]>
Commit | Line | Data |
---|---|---|
a032b68d | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
6e866b33 MB |
2 | |
3 | #include <errno.h> | |
bb4f798a | 4 | #include <locale.h> |
6e866b33 MB |
5 | #include <math.h> |
6 | #include <stdarg.h> | |
6e866b33 | 7 | #include <stdlib.h> |
6e866b33 MB |
8 | #include <sys/types.h> |
9 | ||
10 | #include "sd-messages.h" | |
11 | ||
12 | #include "alloc-util.h" | |
bb4f798a | 13 | #include "errno-util.h" |
6e866b33 MB |
14 | #include "fd-util.h" |
15 | #include "fileio.h" | |
16 | #include "float.h" | |
17 | #include "hexdecoct.h" | |
18 | #include "json-internal.h" | |
19 | #include "json.h" | |
20 | #include "macro.h" | |
bb4f798a | 21 | #include "memory-util.h" |
6e866b33 MB |
22 | #include "string-table.h" |
23 | #include "string-util.h" | |
24 | #include "strv.h" | |
25 | #include "terminal-util.h" | |
46cdbd49 | 26 | #include "user-util.h" |
6e866b33 MB |
27 | #include "utf8.h" |
28 | ||
46cdbd49 | 29 | /* Refuse putting together variants with a larger depth than 2K by default (as a protection against overflowing stacks |
6e866b33 MB |
30 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
31 | * remains under 2^16. | |
46cdbd49 BR |
32 | * |
33 | * The value first was 16k, but it was discovered to be too high on llvm/x86-64. See also: | |
34 | * https://github.com/systemd/systemd/issues/10738 | |
35 | * | |
36 | * The value then was 4k, but it was discovered to be too high on s390x/aarch64. See also: | |
37 | * https://github.com/systemd/systemd/issues/14396 */ | |
38 | ||
39 | #define DEPTH_MAX (2U*1024U) | |
6e866b33 MB |
40 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
41 | ||
42 | typedef struct JsonSource { | |
43 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
44 | size_t n_ref; | |
45 | unsigned max_line; | |
46 | unsigned max_column; | |
47 | char name[]; | |
48 | } JsonSource; | |
49 | ||
50 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
51 | struct JsonVariant { | |
52 | union { | |
53 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
54 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
55 | * see below.) */ | |
56 | size_t n_ref; | |
57 | ||
58 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
59 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
60 | JsonVariant *parent; | |
61 | }; | |
62 | ||
63 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ | |
64 | JsonSource *source; | |
65 | unsigned line, column; | |
66 | ||
3a6ce677 BR |
67 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
68 | uint16_t depth; | |
69 | ||
70 | JsonVariantType type:8; | |
6e866b33 MB |
71 | |
72 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
73 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
74 | bool is_embedded:1; | |
75 | ||
76 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
77 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
78 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
79 | bool is_reference:1; | |
80 | ||
81 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
82 | bool is_marked:1; | |
83 | ||
46cdbd49 BR |
84 | /* Erase from memory when freeing */ |
85 | bool sensitive:1; | |
86 | ||
87 | /* If this is an object the fields are strictly ordered by name */ | |
88 | bool sorted:1; | |
89 | ||
90 | /* If in addition to this object all objects referenced by it are also ordered strictly by name */ | |
91 | bool normalized:1; | |
92 | ||
6e866b33 MB |
93 | union { |
94 | /* For simple types we store the value in-line. */ | |
95 | JsonValue value; | |
96 | ||
97 | /* For objects and arrays we store the number of elements immediately following */ | |
98 | size_t n_elements; | |
99 | ||
100 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
101 | JsonVariant *reference; | |
102 | ||
103 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
104 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
105 | * element, while longer strings are stored as references. When this object is not embedded into an | |
106 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
107 | * much larger than INLINE_STRING_LENGTH. | |
108 | * | |
109 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
110 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
111 | * would the union and then the struct this is included in. And of structures with undefined size we | |
112 | * can't allocate arrays (at least not easily). */ | |
113 | char string[0]; | |
114 | }; | |
115 | }; | |
116 | ||
117 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
118 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
119 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
120 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
121 | ||
122 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
123 | * (x86-64). */ | |
124 | #ifdef __x86_64__ | |
125 | assert_cc(sizeof(JsonVariant) == 48U); | |
126 | assert_cc(INLINE_STRING_MAX == 15U); | |
127 | #endif | |
128 | ||
129 | static JsonSource* json_source_new(const char *name) { | |
130 | JsonSource *s; | |
131 | ||
132 | assert(name); | |
133 | ||
134 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
135 | if (!s) | |
136 | return NULL; | |
137 | ||
138 | *s = (JsonSource) { | |
139 | .n_ref = 1, | |
140 | }; | |
141 | strcpy(s->name, name); | |
142 | ||
143 | return s; | |
144 | } | |
145 | ||
146 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
147 | ||
148 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
149 | if (a == b) | |
150 | return true; | |
151 | ||
152 | if (!a || !b) | |
153 | return false; | |
154 | ||
155 | return streq(a->name, b->name); | |
156 | } | |
157 | ||
158 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
159 | ||
160 | /* There are four kind of JsonVariant* pointers: | |
161 | * | |
162 | * 1. NULL | |
163 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
164 | * 3. A 'magic' one, i.e. one of the special JSON_VARIANT_MAGIC_XYZ values, that encode a few very basic values directly in the pointer. | |
165 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
166 | * | |
167 | * The four kinds of pointers can be discerned like this: | |
168 | * | |
169 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
170 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
171 | * OSes, as it is a faulting page). In order to discern #2 and #4 we check the lowest bit. If it's off it's #2, | |
172 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
173 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
174 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
175 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
176 | ||
177 | static bool json_variant_is_magic(const JsonVariant *v) { | |
178 | if (!v) | |
179 | return false; | |
180 | ||
181 | return v < _JSON_VARIANT_MAGIC_MAX; | |
182 | } | |
183 | ||
184 | static bool json_variant_is_const_string(const JsonVariant *v) { | |
185 | ||
186 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
187 | return false; | |
188 | ||
189 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
190 | * hence use all uneven pointers as indicators for const strings. */ | |
191 | ||
192 | return (((uintptr_t) v) & 1) != 0; | |
193 | } | |
194 | ||
195 | static bool json_variant_is_regular(const JsonVariant *v) { | |
196 | ||
197 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
198 | return false; | |
199 | ||
200 | return (((uintptr_t) v) & 1) == 0; | |
201 | } | |
202 | ||
203 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
204 | ||
205 | /* Recursively dereference variants that are references to other variants */ | |
206 | ||
207 | if (!v) | |
208 | return NULL; | |
209 | ||
210 | if (!json_variant_is_regular(v)) | |
211 | return v; | |
212 | ||
213 | if (!v->is_reference) | |
214 | return v; | |
215 | ||
216 | return json_variant_dereference(v->reference); | |
217 | } | |
218 | ||
219 | static uint16_t json_variant_depth(JsonVariant *v) { | |
220 | ||
221 | v = json_variant_dereference(v); | |
222 | if (!v) | |
223 | return 0; | |
224 | ||
225 | if (!json_variant_is_regular(v)) | |
226 | return 0; | |
227 | ||
228 | return v->depth; | |
229 | } | |
230 | ||
46cdbd49 | 231 | static JsonVariant *json_variant_formalize(JsonVariant *v) { |
6e866b33 | 232 | |
46cdbd49 BR |
233 | /* Converts json variant pointers to their normalized form, i.e. fully dereferenced and wherever |
234 | * possible converted to the "magic" version if there is one */ | |
6e866b33 MB |
235 | |
236 | if (!v) | |
237 | return NULL; | |
238 | ||
239 | v = json_variant_dereference(v); | |
240 | ||
241 | switch (json_variant_type(v)) { | |
242 | ||
243 | case JSON_VARIANT_BOOLEAN: | |
244 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
245 | ||
246 | case JSON_VARIANT_NULL: | |
247 | return JSON_VARIANT_MAGIC_NULL; | |
248 | ||
249 | case JSON_VARIANT_INTEGER: | |
250 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
251 | ||
252 | case JSON_VARIANT_UNSIGNED: | |
253 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
254 | ||
255 | case JSON_VARIANT_REAL: | |
a10f5d05 | 256 | DISABLE_WARNING_FLOAT_EQUAL; |
6e866b33 | 257 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; |
a10f5d05 | 258 | REENABLE_WARNING; |
6e866b33 MB |
259 | |
260 | case JSON_VARIANT_STRING: | |
261 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
262 | ||
263 | case JSON_VARIANT_ARRAY: | |
264 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
265 | ||
266 | case JSON_VARIANT_OBJECT: | |
267 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
268 | ||
269 | default: | |
270 | return v; | |
271 | } | |
272 | } | |
273 | ||
46cdbd49 | 274 | static JsonVariant *json_variant_conservative_formalize(JsonVariant *v) { |
6e866b33 | 275 | |
46cdbd49 | 276 | /* Much like json_variant_formalize(), but won't simplify if the variant has a source/line location attached to |
6e866b33 MB |
277 | * it, in order not to lose context */ |
278 | ||
279 | if (!v) | |
280 | return NULL; | |
281 | ||
282 | if (!json_variant_is_regular(v)) | |
283 | return v; | |
284 | ||
285 | if (v->source || v->line > 0 || v->column > 0) | |
286 | return v; | |
287 | ||
46cdbd49 | 288 | return json_variant_formalize(v); |
6e866b33 MB |
289 | } |
290 | ||
291 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
292 | JsonVariant *v; | |
293 | ||
294 | assert_return(ret, -EINVAL); | |
295 | ||
f2dec872 BR |
296 | v = malloc0(MAX(sizeof(JsonVariant), |
297 | offsetof(JsonVariant, value) + space)); | |
6e866b33 MB |
298 | if (!v) |
299 | return -ENOMEM; | |
300 | ||
301 | v->n_ref = 1; | |
302 | v->type = type; | |
303 | ||
304 | *ret = v; | |
305 | return 0; | |
306 | } | |
307 | ||
308 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
309 | JsonVariant *v; | |
310 | int r; | |
311 | ||
312 | assert_return(ret, -EINVAL); | |
313 | ||
314 | if (i == 0) { | |
315 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
316 | return 0; | |
317 | } | |
318 | ||
319 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
320 | if (r < 0) | |
321 | return r; | |
322 | ||
323 | v->value.integer = i; | |
324 | *ret = v; | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
330 | JsonVariant *v; | |
331 | int r; | |
332 | ||
333 | assert_return(ret, -EINVAL); | |
334 | if (u == 0) { | |
335 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
340 | if (r < 0) | |
341 | return r; | |
342 | ||
343 | v->value.unsig = u; | |
344 | *ret = v; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
350 | JsonVariant *v; | |
351 | int r; | |
352 | ||
353 | assert_return(ret, -EINVAL); | |
354 | ||
a10f5d05 | 355 | DISABLE_WARNING_FLOAT_EQUAL; |
6e866b33 | 356 | if (d == 0.0) { |
6e866b33 MB |
357 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; |
358 | return 0; | |
359 | } | |
a10f5d05 | 360 | REENABLE_WARNING; |
6e866b33 MB |
361 | |
362 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | v->value.real = d; | |
367 | *ret = v; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
373 | assert_return(ret, -EINVAL); | |
374 | ||
375 | if (b) | |
376 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
377 | else | |
378 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | int json_variant_new_null(JsonVariant **ret) { | |
384 | assert_return(ret, -EINVAL); | |
385 | ||
386 | *ret = JSON_VARIANT_MAGIC_NULL; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
391 | JsonVariant *v; | |
392 | int r; | |
393 | ||
394 | assert_return(ret, -EINVAL); | |
395 | if (!s) { | |
3a6ce677 | 396 | assert_return(IN_SET(n, 0, SIZE_MAX), -EINVAL); |
6e866b33 MB |
397 | return json_variant_new_null(ret); |
398 | } | |
3a6ce677 | 399 | if (n == SIZE_MAX) /* determine length automatically */ |
f2dec872 BR |
400 | n = strlen(s); |
401 | else if (memchr(s, 0, n)) /* don't allow embedded NUL, as we can't express that in JSON */ | |
402 | return -EINVAL; | |
6e866b33 MB |
403 | if (n == 0) { |
404 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
405 | return 0; | |
406 | } | |
407 | ||
a032b68d MB |
408 | if (!utf8_is_valid_n(s, n)) /* JSON strings must be valid UTF-8 */ |
409 | return -EUCLEAN; | |
410 | ||
6e866b33 MB |
411 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); |
412 | if (r < 0) | |
413 | return r; | |
414 | ||
415 | memcpy(v->string, s, n); | |
416 | v->string[n] = 0; | |
417 | ||
418 | *ret = v; | |
419 | return 0; | |
420 | } | |
421 | ||
46cdbd49 BR |
422 | int json_variant_new_base64(JsonVariant **ret, const void *p, size_t n) { |
423 | _cleanup_free_ char *s = NULL; | |
424 | ssize_t k; | |
425 | ||
426 | assert_return(ret, -EINVAL); | |
427 | assert_return(n == 0 || p, -EINVAL); | |
428 | ||
429 | k = base64mem(p, n, &s); | |
430 | if (k < 0) | |
431 | return k; | |
432 | ||
433 | return json_variant_new_stringn(ret, s, k); | |
434 | } | |
435 | ||
3a6ce677 BR |
436 | int json_variant_new_hex(JsonVariant **ret, const void *p, size_t n) { |
437 | _cleanup_free_ char *s = NULL; | |
438 | ||
439 | assert_return(ret, -EINVAL); | |
440 | assert_return(n == 0 || p, -EINVAL); | |
441 | ||
442 | s = hexmem(p, n); | |
443 | if (!s) | |
444 | return -ENOMEM; | |
445 | ||
446 | return json_variant_new_stringn(ret, s, n*2); | |
447 | } | |
448 | ||
a032b68d MB |
449 | int json_variant_new_id128(JsonVariant **ret, sd_id128_t id) { |
450 | char s[SD_ID128_STRING_MAX]; | |
451 | ||
452 | return json_variant_new_string(ret, sd_id128_to_string(id, s)); | |
453 | } | |
454 | ||
6e866b33 MB |
455 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { |
456 | assert(a); | |
457 | ||
458 | b = json_variant_dereference(b); | |
459 | if (!b) { | |
460 | a->type = JSON_VARIANT_NULL; | |
461 | return; | |
462 | } | |
463 | ||
464 | a->type = json_variant_type(b); | |
465 | switch (a->type) { | |
466 | ||
467 | case JSON_VARIANT_INTEGER: | |
468 | a->value.integer = json_variant_integer(b); | |
469 | break; | |
470 | ||
471 | case JSON_VARIANT_UNSIGNED: | |
472 | a->value.unsig = json_variant_unsigned(b); | |
473 | break; | |
474 | ||
475 | case JSON_VARIANT_REAL: | |
476 | a->value.real = json_variant_real(b); | |
477 | break; | |
478 | ||
479 | case JSON_VARIANT_BOOLEAN: | |
480 | a->value.boolean = json_variant_boolean(b); | |
481 | break; | |
482 | ||
483 | case JSON_VARIANT_STRING: { | |
484 | const char *s; | |
485 | ||
486 | assert_se(s = json_variant_string(b)); | |
487 | ||
488 | /* Short strings we can store inline */ | |
489 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
490 | strcpy(a->string, s); | |
491 | break; | |
492 | } | |
493 | ||
494 | /* For longer strings, use a reference… */ | |
495 | _fallthrough_; | |
496 | } | |
497 | ||
498 | case JSON_VARIANT_ARRAY: | |
499 | case JSON_VARIANT_OBJECT: | |
500 | a->is_reference = true; | |
46cdbd49 | 501 | a->reference = json_variant_ref(json_variant_conservative_formalize(b)); |
6e866b33 MB |
502 | break; |
503 | ||
504 | case JSON_VARIANT_NULL: | |
505 | break; | |
506 | ||
507 | default: | |
508 | assert_not_reached("Unexpected variant type"); | |
509 | } | |
510 | } | |
511 | ||
512 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
513 | assert(v); | |
514 | assert(from); | |
515 | ||
516 | if (!json_variant_is_regular(from)) | |
517 | return; | |
518 | ||
519 | v->line = from->line; | |
520 | v->column = from->column; | |
521 | v->source = json_source_ref(from->source); | |
522 | } | |
523 | ||
524 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
525 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
46cdbd49 | 526 | bool normalized = true; |
6e866b33 MB |
527 | |
528 | assert_return(ret, -EINVAL); | |
529 | if (n == 0) { | |
530 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
531 | return 0; | |
532 | } | |
533 | assert_return(array, -EINVAL); | |
534 | ||
535 | v = new(JsonVariant, n + 1); | |
536 | if (!v) | |
537 | return -ENOMEM; | |
538 | ||
539 | *v = (JsonVariant) { | |
540 | .n_ref = 1, | |
541 | .type = JSON_VARIANT_ARRAY, | |
542 | }; | |
543 | ||
544 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
545 | JsonVariant *w = v + 1 + v->n_elements, | |
546 | *c = array[v->n_elements]; | |
547 | uint16_t d; | |
548 | ||
549 | d = json_variant_depth(c); | |
550 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
551 | return -ELNRNG; | |
552 | if (d >= v->depth) | |
553 | v->depth = d + 1; | |
554 | ||
555 | *w = (JsonVariant) { | |
556 | .is_embedded = true, | |
557 | .parent = v, | |
558 | }; | |
559 | ||
560 | json_variant_set(w, c); | |
561 | json_variant_copy_source(w, c); | |
46cdbd49 BR |
562 | |
563 | if (!json_variant_is_normalized(c)) | |
564 | normalized = false; | |
6e866b33 MB |
565 | } |
566 | ||
46cdbd49 BR |
567 | v->normalized = normalized; |
568 | ||
6e866b33 MB |
569 | *ret = TAKE_PTR(v); |
570 | return 0; | |
571 | } | |
572 | ||
573 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
574 | JsonVariant *v; | |
575 | size_t i; | |
576 | ||
577 | assert_return(ret, -EINVAL); | |
578 | if (n == 0) { | |
579 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
580 | return 0; | |
581 | } | |
582 | assert_return(p, -EINVAL); | |
583 | ||
584 | v = new(JsonVariant, n + 1); | |
585 | if (!v) | |
586 | return -ENOMEM; | |
587 | ||
588 | *v = (JsonVariant) { | |
589 | .n_ref = 1, | |
590 | .type = JSON_VARIANT_ARRAY, | |
591 | .n_elements = n, | |
592 | .depth = 1, | |
593 | }; | |
594 | ||
595 | for (i = 0; i < n; i++) { | |
596 | JsonVariant *w = v + 1 + i; | |
597 | ||
598 | *w = (JsonVariant) { | |
599 | .is_embedded = true, | |
600 | .parent = v, | |
601 | .type = JSON_VARIANT_UNSIGNED, | |
602 | .value.unsig = ((const uint8_t*) p)[i], | |
603 | }; | |
604 | } | |
605 | ||
46cdbd49 BR |
606 | v->normalized = true; |
607 | ||
6e866b33 MB |
608 | *ret = v; |
609 | return 0; | |
610 | } | |
611 | ||
612 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
613 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
614 | size_t n; | |
615 | int r; | |
616 | ||
617 | assert(ret); | |
618 | ||
619 | n = strv_length(l); | |
620 | if (n == 0) { | |
621 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
622 | return 0; | |
623 | } | |
624 | ||
625 | v = new(JsonVariant, n + 1); | |
626 | if (!v) | |
627 | return -ENOMEM; | |
628 | ||
629 | *v = (JsonVariant) { | |
630 | .n_ref = 1, | |
631 | .type = JSON_VARIANT_ARRAY, | |
632 | .depth = 1, | |
633 | }; | |
634 | ||
635 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
636 | JsonVariant *w = v + 1 + v->n_elements; | |
637 | size_t k; | |
638 | ||
639 | *w = (JsonVariant) { | |
640 | .is_embedded = true, | |
641 | .parent = v, | |
642 | .type = JSON_VARIANT_STRING, | |
643 | }; | |
644 | ||
645 | k = strlen(l[v->n_elements]); | |
646 | ||
647 | if (k > INLINE_STRING_MAX) { | |
648 | /* If string is too long, store it as reference. */ | |
649 | ||
f2dec872 | 650 | r = json_variant_new_string(&w->reference, l[v->n_elements]); |
6e866b33 MB |
651 | if (r < 0) |
652 | return r; | |
653 | ||
654 | w->is_reference = true; | |
a032b68d MB |
655 | } else { |
656 | if (!utf8_is_valid_n(l[v->n_elements], k)) /* JSON strings must be valid UTF-8 */ | |
657 | return -EUCLEAN; | |
658 | ||
6e866b33 | 659 | memcpy(w->string, l[v->n_elements], k+1); |
a032b68d | 660 | } |
6e866b33 MB |
661 | } |
662 | ||
46cdbd49 BR |
663 | v->normalized = true; |
664 | ||
6e866b33 MB |
665 | *ret = TAKE_PTR(v); |
666 | return 0; | |
667 | } | |
668 | ||
669 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
670 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
46cdbd49 BR |
671 | const char *prev = NULL; |
672 | bool sorted = true, normalized = true; | |
6e866b33 MB |
673 | |
674 | assert_return(ret, -EINVAL); | |
675 | if (n == 0) { | |
676 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
677 | return 0; | |
678 | } | |
679 | assert_return(array, -EINVAL); | |
680 | assert_return(n % 2 == 0, -EINVAL); | |
681 | ||
682 | v = new(JsonVariant, n + 1); | |
683 | if (!v) | |
684 | return -ENOMEM; | |
685 | ||
686 | *v = (JsonVariant) { | |
687 | .n_ref = 1, | |
688 | .type = JSON_VARIANT_OBJECT, | |
689 | }; | |
690 | ||
691 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
692 | JsonVariant *w = v + 1 + v->n_elements, | |
693 | *c = array[v->n_elements]; | |
694 | uint16_t d; | |
695 | ||
46cdbd49 BR |
696 | if ((v->n_elements & 1) == 0) { |
697 | const char *k; | |
698 | ||
699 | if (!json_variant_is_string(c)) | |
700 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
701 | ||
702 | assert_se(k = json_variant_string(c)); | |
703 | ||
704 | if (prev && strcmp(k, prev) <= 0) | |
705 | sorted = normalized = false; | |
706 | ||
707 | prev = k; | |
708 | } else if (!json_variant_is_normalized(c)) | |
709 | normalized = false; | |
6e866b33 MB |
710 | |
711 | d = json_variant_depth(c); | |
712 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
713 | return -ELNRNG; | |
714 | if (d >= v->depth) | |
715 | v->depth = d + 1; | |
716 | ||
717 | *w = (JsonVariant) { | |
718 | .is_embedded = true, | |
719 | .parent = v, | |
720 | }; | |
721 | ||
722 | json_variant_set(w, c); | |
723 | json_variant_copy_source(w, c); | |
724 | } | |
725 | ||
46cdbd49 BR |
726 | v->normalized = normalized; |
727 | v->sorted = sorted; | |
728 | ||
6e866b33 MB |
729 | *ret = TAKE_PTR(v); |
730 | return 0; | |
731 | } | |
732 | ||
46cdbd49 BR |
733 | static size_t json_variant_size(JsonVariant* v) { |
734 | ||
735 | if (!json_variant_is_regular(v)) | |
736 | return 0; | |
737 | ||
738 | if (v->is_reference) | |
739 | return offsetof(JsonVariant, reference) + sizeof(JsonVariant*); | |
740 | ||
741 | switch (v->type) { | |
742 | ||
743 | case JSON_VARIANT_STRING: | |
744 | return offsetof(JsonVariant, string) + strlen(v->string) + 1; | |
745 | ||
746 | case JSON_VARIANT_REAL: | |
747 | return offsetof(JsonVariant, value) + sizeof(long double); | |
748 | ||
749 | case JSON_VARIANT_UNSIGNED: | |
750 | return offsetof(JsonVariant, value) + sizeof(uintmax_t); | |
751 | ||
752 | case JSON_VARIANT_INTEGER: | |
753 | return offsetof(JsonVariant, value) + sizeof(intmax_t); | |
754 | ||
755 | case JSON_VARIANT_BOOLEAN: | |
756 | return offsetof(JsonVariant, value) + sizeof(bool); | |
757 | ||
758 | case JSON_VARIANT_ARRAY: | |
759 | case JSON_VARIANT_OBJECT: | |
760 | return offsetof(JsonVariant, n_elements) + sizeof(size_t); | |
761 | ||
762 | case JSON_VARIANT_NULL: | |
763 | return offsetof(JsonVariant, value); | |
764 | ||
765 | default: | |
766 | assert_not_reached("unexpected type"); | |
767 | } | |
768 | } | |
769 | ||
770 | static void json_variant_free_inner(JsonVariant *v, bool force_sensitive) { | |
771 | bool sensitive; | |
772 | ||
6e866b33 MB |
773 | assert(v); |
774 | ||
775 | if (!json_variant_is_regular(v)) | |
776 | return; | |
777 | ||
778 | json_source_unref(v->source); | |
779 | ||
46cdbd49 BR |
780 | sensitive = v->sensitive || force_sensitive; |
781 | ||
6e866b33 | 782 | if (v->is_reference) { |
46cdbd49 BR |
783 | if (sensitive) |
784 | json_variant_sensitive(v->reference); | |
785 | ||
6e866b33 MB |
786 | json_variant_unref(v->reference); |
787 | return; | |
788 | } | |
789 | ||
790 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
791 | size_t i; | |
792 | ||
793 | for (i = 0; i < v->n_elements; i++) | |
46cdbd49 | 794 | json_variant_free_inner(v + 1 + i, sensitive); |
6e866b33 | 795 | } |
46cdbd49 BR |
796 | |
797 | if (sensitive) | |
798 | explicit_bzero_safe(v, json_variant_size(v)); | |
6e866b33 MB |
799 | } |
800 | ||
801 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
802 | if (!v) | |
803 | return NULL; | |
804 | if (!json_variant_is_regular(v)) | |
805 | return v; | |
806 | ||
807 | if (v->is_embedded) | |
808 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
809 | else { | |
810 | assert(v->n_ref > 0); | |
811 | v->n_ref++; | |
812 | } | |
813 | ||
814 | return v; | |
815 | } | |
816 | ||
817 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
818 | if (!v) | |
819 | return NULL; | |
820 | if (!json_variant_is_regular(v)) | |
821 | return NULL; | |
822 | ||
823 | if (v->is_embedded) | |
824 | json_variant_unref(v->parent); | |
825 | else { | |
826 | assert(v->n_ref > 0); | |
827 | v->n_ref--; | |
828 | ||
829 | if (v->n_ref == 0) { | |
46cdbd49 | 830 | json_variant_free_inner(v, false); |
6e866b33 MB |
831 | free(v); |
832 | } | |
833 | } | |
834 | ||
835 | return NULL; | |
836 | } | |
837 | ||
838 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
839 | size_t i; | |
840 | ||
841 | assert(array || n == 0); | |
842 | ||
843 | for (i = 0; i < n; i++) | |
844 | json_variant_unref(array[i]); | |
845 | } | |
846 | ||
847 | const char *json_variant_string(JsonVariant *v) { | |
848 | if (!v) | |
849 | return NULL; | |
850 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
851 | return ""; | |
852 | if (json_variant_is_magic(v)) | |
853 | goto mismatch; | |
854 | if (json_variant_is_const_string(v)) { | |
855 | uintptr_t p = (uintptr_t) v; | |
856 | ||
857 | assert((p & 1) != 0); | |
858 | return (const char*) (p ^ 1U); | |
859 | } | |
860 | ||
861 | if (v->is_reference) | |
862 | return json_variant_string(v->reference); | |
863 | if (v->type != JSON_VARIANT_STRING) | |
864 | goto mismatch; | |
865 | ||
866 | return v->string; | |
867 | ||
868 | mismatch: | |
869 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
870 | return NULL; | |
871 | } | |
872 | ||
873 | bool json_variant_boolean(JsonVariant *v) { | |
874 | if (!v) | |
875 | goto mismatch; | |
876 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
877 | return true; | |
878 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
879 | return false; | |
880 | if (!json_variant_is_regular(v)) | |
881 | goto mismatch; | |
882 | if (v->type != JSON_VARIANT_BOOLEAN) | |
883 | goto mismatch; | |
884 | if (v->is_reference) | |
885 | return json_variant_boolean(v->reference); | |
886 | ||
887 | return v->value.boolean; | |
888 | ||
889 | mismatch: | |
890 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
891 | return false; | |
892 | } | |
893 | ||
894 | intmax_t json_variant_integer(JsonVariant *v) { | |
895 | if (!v) | |
896 | goto mismatch; | |
897 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
898 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
899 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
900 | return 0; | |
901 | if (!json_variant_is_regular(v)) | |
902 | goto mismatch; | |
903 | if (v->is_reference) | |
904 | return json_variant_integer(v->reference); | |
905 | ||
906 | switch (v->type) { | |
907 | ||
908 | case JSON_VARIANT_INTEGER: | |
909 | return v->value.integer; | |
910 | ||
911 | case JSON_VARIANT_UNSIGNED: | |
912 | if (v->value.unsig <= INTMAX_MAX) | |
913 | return (intmax_t) v->value.unsig; | |
914 | ||
915 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
916 | return 0; | |
917 | ||
918 | case JSON_VARIANT_REAL: { | |
919 | intmax_t converted; | |
920 | ||
921 | converted = (intmax_t) v->value.real; | |
922 | ||
a10f5d05 | 923 | DISABLE_WARNING_FLOAT_EQUAL; |
6e866b33 | 924 | if ((long double) converted == v->value.real) |
6e866b33 | 925 | return converted; |
a10f5d05 | 926 | REENABLE_WARNING; |
6e866b33 MB |
927 | |
928 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
929 | return 0; | |
930 | } | |
931 | ||
932 | default: | |
933 | break; | |
934 | } | |
935 | ||
936 | mismatch: | |
937 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
938 | return 0; | |
939 | } | |
940 | ||
941 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
942 | if (!v) | |
943 | goto mismatch; | |
944 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
945 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
946 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
947 | return 0; | |
948 | if (!json_variant_is_regular(v)) | |
949 | goto mismatch; | |
950 | if (v->is_reference) | |
951 | return json_variant_integer(v->reference); | |
952 | ||
953 | switch (v->type) { | |
954 | ||
955 | case JSON_VARIANT_INTEGER: | |
956 | if (v->value.integer >= 0) | |
957 | return (uintmax_t) v->value.integer; | |
958 | ||
959 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
960 | return 0; | |
961 | ||
962 | case JSON_VARIANT_UNSIGNED: | |
963 | return v->value.unsig; | |
964 | ||
965 | case JSON_VARIANT_REAL: { | |
966 | uintmax_t converted; | |
967 | ||
968 | converted = (uintmax_t) v->value.real; | |
969 | ||
a10f5d05 | 970 | DISABLE_WARNING_FLOAT_EQUAL; |
6e866b33 | 971 | if ((long double) converted == v->value.real) |
6e866b33 | 972 | return converted; |
a10f5d05 | 973 | REENABLE_WARNING; |
6e866b33 MB |
974 | |
975 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
976 | return 0; | |
977 | } | |
978 | ||
979 | default: | |
980 | break; | |
981 | } | |
982 | ||
983 | mismatch: | |
984 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
985 | return 0; | |
986 | } | |
987 | ||
988 | long double json_variant_real(JsonVariant *v) { | |
989 | if (!v) | |
990 | return 0.0; | |
991 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
992 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
993 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
994 | return 0.0; | |
995 | if (!json_variant_is_regular(v)) | |
996 | goto mismatch; | |
997 | if (v->is_reference) | |
998 | return json_variant_real(v->reference); | |
999 | ||
1000 | switch (v->type) { | |
1001 | ||
1002 | case JSON_VARIANT_REAL: | |
1003 | return v->value.real; | |
1004 | ||
1005 | case JSON_VARIANT_INTEGER: { | |
1006 | long double converted; | |
1007 | ||
1008 | converted = (long double) v->value.integer; | |
1009 | ||
1010 | if ((intmax_t) converted == v->value.integer) | |
1011 | return converted; | |
1012 | ||
1013 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
1014 | return 0.0; | |
1015 | } | |
1016 | ||
1017 | case JSON_VARIANT_UNSIGNED: { | |
1018 | long double converted; | |
1019 | ||
1020 | converted = (long double) v->value.unsig; | |
1021 | ||
1022 | if ((uintmax_t) converted == v->value.unsig) | |
1023 | return converted; | |
1024 | ||
1025 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
1026 | return 0.0; | |
1027 | } | |
1028 | ||
1029 | default: | |
1030 | break; | |
1031 | } | |
1032 | ||
1033 | mismatch: | |
1034 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
1035 | return 0.0; | |
1036 | } | |
1037 | ||
1038 | bool json_variant_is_negative(JsonVariant *v) { | |
1039 | if (!v) | |
1040 | goto mismatch; | |
1041 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
1042 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
1043 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1044 | return false; | |
1045 | if (!json_variant_is_regular(v)) | |
1046 | goto mismatch; | |
1047 | if (v->is_reference) | |
1048 | return json_variant_is_negative(v->reference); | |
1049 | ||
1050 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
1051 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
1052 | * values. */ | |
1053 | ||
1054 | switch (v->type) { | |
1055 | ||
1056 | case JSON_VARIANT_REAL: | |
1057 | return v->value.real < 0; | |
1058 | ||
1059 | case JSON_VARIANT_INTEGER: | |
1060 | return v->value.integer < 0; | |
1061 | ||
1062 | case JSON_VARIANT_UNSIGNED: | |
1063 | return false; | |
1064 | ||
1065 | default: | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | mismatch: | |
1070 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
1071 | return false; | |
1072 | } | |
1073 | ||
46cdbd49 BR |
1074 | bool json_variant_is_blank_object(JsonVariant *v) { |
1075 | /* Returns true if the specified object is null or empty */ | |
1076 | return !v || | |
1077 | json_variant_is_null(v) || | |
1078 | (json_variant_is_object(v) && json_variant_elements(v) == 0); | |
1079 | } | |
1080 | ||
1081 | bool json_variant_is_blank_array(JsonVariant *v) { | |
1082 | return !v || | |
1083 | json_variant_is_null(v) || | |
1084 | (json_variant_is_array(v) && json_variant_elements(v) == 0); | |
1085 | } | |
1086 | ||
6e866b33 MB |
1087 | JsonVariantType json_variant_type(JsonVariant *v) { |
1088 | ||
1089 | if (!v) | |
1090 | return _JSON_VARIANT_TYPE_INVALID; | |
1091 | ||
1092 | if (json_variant_is_const_string(v)) | |
1093 | return JSON_VARIANT_STRING; | |
1094 | ||
1095 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) | |
1096 | return JSON_VARIANT_BOOLEAN; | |
1097 | ||
1098 | if (v == JSON_VARIANT_MAGIC_NULL) | |
1099 | return JSON_VARIANT_NULL; | |
1100 | ||
1101 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
1102 | return JSON_VARIANT_INTEGER; | |
1103 | ||
1104 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
1105 | return JSON_VARIANT_UNSIGNED; | |
1106 | ||
1107 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1108 | return JSON_VARIANT_REAL; | |
1109 | ||
1110 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
1111 | return JSON_VARIANT_STRING; | |
1112 | ||
1113 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
1114 | return JSON_VARIANT_ARRAY; | |
1115 | ||
1116 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1117 | return JSON_VARIANT_OBJECT; | |
1118 | ||
1119 | return v->type; | |
1120 | } | |
1121 | ||
a10f5d05 | 1122 | _function_no_sanitize_float_cast_overflow_ bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { |
6e866b33 MB |
1123 | JsonVariantType rt; |
1124 | ||
a10f5d05 MB |
1125 | /* Note: we turn off ubsan float cast overflo detection for this function, since it would complain |
1126 | * about our float casts but we do them explicitly to detect conversion errors. */ | |
1127 | ||
6e866b33 | 1128 | v = json_variant_dereference(v); |
7c20daf6 FS |
1129 | if (!v) |
1130 | return false; | |
6e866b33 MB |
1131 | |
1132 | rt = json_variant_type(v); | |
1133 | if (rt == type) | |
1134 | return true; | |
1135 | ||
1136 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ | |
1137 | if (json_variant_is_const_string(v)) | |
1138 | return false; | |
1139 | ||
1140 | /* All three magic zeroes qualify as integer, unsigned and as real */ | |
1141 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
1142 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
1143 | return true; | |
1144 | ||
1145 | /* All other magic variant types are only equal to themselves */ | |
1146 | if (json_variant_is_magic(v)) | |
1147 | return false; | |
1148 | ||
1149 | /* Handle the "number" pseudo type */ | |
1150 | if (type == JSON_VARIANT_NUMBER) | |
1151 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1152 | ||
1153 | /* Integer conversions are OK in many cases */ | |
1154 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1155 | return v->value.integer >= 0; | |
1156 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1157 | return v->value.unsig <= INTMAX_MAX; | |
1158 | ||
1159 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1160 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1161 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1162 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1163 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1164 | ||
a10f5d05 MB |
1165 | DISABLE_WARNING_FLOAT_EQUAL; |
1166 | ||
6e866b33 MB |
1167 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ |
1168 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1169 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1170 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1171 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
a10f5d05 MB |
1172 | |
1173 | REENABLE_WARNING; | |
6e866b33 MB |
1174 | |
1175 | return false; | |
1176 | } | |
1177 | ||
1178 | size_t json_variant_elements(JsonVariant *v) { | |
1179 | if (!v) | |
1180 | return 0; | |
1181 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1182 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1183 | return 0; | |
1184 | if (!json_variant_is_regular(v)) | |
1185 | goto mismatch; | |
1186 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1187 | goto mismatch; | |
1188 | if (v->is_reference) | |
1189 | return json_variant_elements(v->reference); | |
1190 | ||
1191 | return v->n_elements; | |
1192 | ||
1193 | mismatch: | |
1194 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1199 | if (!v) | |
1200 | return NULL; | |
1201 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1202 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1203 | return NULL; | |
1204 | if (!json_variant_is_regular(v)) | |
1205 | goto mismatch; | |
1206 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1207 | goto mismatch; | |
1208 | if (v->is_reference) | |
1209 | return json_variant_by_index(v->reference, idx); | |
1210 | if (idx >= v->n_elements) | |
1211 | return NULL; | |
1212 | ||
46cdbd49 | 1213 | return json_variant_conservative_formalize(v + 1 + idx); |
6e866b33 MB |
1214 | |
1215 | mismatch: | |
1216 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1217 | return NULL; | |
1218 | } | |
1219 | ||
1220 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1221 | size_t i; | |
1222 | ||
1223 | if (!v) | |
1224 | goto not_found; | |
1225 | if (!key) | |
1226 | goto not_found; | |
1227 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1228 | goto not_found; | |
1229 | if (!json_variant_is_regular(v)) | |
1230 | goto mismatch; | |
1231 | if (v->type != JSON_VARIANT_OBJECT) | |
1232 | goto mismatch; | |
1233 | if (v->is_reference) | |
1234 | return json_variant_by_key(v->reference, key); | |
1235 | ||
46cdbd49 BR |
1236 | if (v->sorted) { |
1237 | size_t a = 0, b = v->n_elements/2; | |
1238 | ||
1239 | /* If the variant is sorted we can use bisection to find the entry we need in O(log(n)) time */ | |
1240 | ||
1241 | while (b > a) { | |
1242 | JsonVariant *p; | |
1243 | const char *f; | |
1244 | int c; | |
1245 | ||
1246 | i = (a + b) / 2; | |
1247 | p = json_variant_dereference(v + 1 + i*2); | |
1248 | ||
1249 | assert_se(f = json_variant_string(p)); | |
1250 | ||
1251 | c = strcmp(key, f); | |
1252 | if (c == 0) { | |
1253 | if (ret_key) | |
1254 | *ret_key = json_variant_conservative_formalize(v + 1 + i*2); | |
1255 | ||
1256 | return json_variant_conservative_formalize(v + 1 + i*2 + 1); | |
1257 | } else if (c < 0) | |
1258 | b = i; | |
1259 | else | |
1260 | a = i + 1; | |
1261 | } | |
1262 | ||
1263 | goto not_found; | |
1264 | } | |
1265 | ||
1266 | /* The variant is not sorted, hence search for the field linearly */ | |
6e866b33 MB |
1267 | for (i = 0; i < v->n_elements; i += 2) { |
1268 | JsonVariant *p; | |
1269 | ||
1270 | p = json_variant_dereference(v + 1 + i); | |
1271 | ||
1272 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1273 | continue; | |
1274 | ||
1275 | if (streq(json_variant_string(p), key)) { | |
1276 | ||
1277 | if (ret_key) | |
46cdbd49 | 1278 | *ret_key = json_variant_conservative_formalize(v + 1 + i); |
6e866b33 | 1279 | |
46cdbd49 | 1280 | return json_variant_conservative_formalize(v + 1 + i + 1); |
6e866b33 MB |
1281 | } |
1282 | } | |
1283 | ||
1284 | not_found: | |
1285 | if (ret_key) | |
1286 | *ret_key = NULL; | |
1287 | ||
1288 | return NULL; | |
1289 | ||
1290 | mismatch: | |
1291 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1292 | if (ret_key) | |
1293 | *ret_key = NULL; | |
1294 | ||
1295 | return NULL; | |
1296 | } | |
1297 | ||
1298 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1299 | return json_variant_by_key_full(v, key, NULL); | |
1300 | } | |
1301 | ||
1302 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1303 | JsonVariantType t; | |
1304 | ||
46cdbd49 BR |
1305 | a = json_variant_formalize(a); |
1306 | b = json_variant_formalize(b); | |
6e866b33 MB |
1307 | |
1308 | if (a == b) | |
1309 | return true; | |
1310 | ||
1311 | t = json_variant_type(a); | |
1312 | if (!json_variant_has_type(b, t)) | |
1313 | return false; | |
1314 | ||
1315 | switch (t) { | |
1316 | ||
1317 | case JSON_VARIANT_STRING: | |
1318 | return streq(json_variant_string(a), json_variant_string(b)); | |
1319 | ||
1320 | case JSON_VARIANT_INTEGER: | |
1321 | return json_variant_integer(a) == json_variant_integer(b); | |
1322 | ||
1323 | case JSON_VARIANT_UNSIGNED: | |
1324 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1325 | ||
1326 | case JSON_VARIANT_REAL: | |
a10f5d05 | 1327 | DISABLE_WARNING_FLOAT_EQUAL; |
6e866b33 | 1328 | return json_variant_real(a) == json_variant_real(b); |
a10f5d05 | 1329 | REENABLE_WARNING; |
6e866b33 MB |
1330 | |
1331 | case JSON_VARIANT_BOOLEAN: | |
1332 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1333 | ||
1334 | case JSON_VARIANT_NULL: | |
1335 | return true; | |
1336 | ||
1337 | case JSON_VARIANT_ARRAY: { | |
1338 | size_t i, n; | |
1339 | ||
1340 | n = json_variant_elements(a); | |
1341 | if (n != json_variant_elements(b)) | |
1342 | return false; | |
1343 | ||
1344 | for (i = 0; i < n; i++) { | |
1345 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1346 | return false; | |
1347 | } | |
1348 | ||
1349 | return true; | |
1350 | } | |
1351 | ||
1352 | case JSON_VARIANT_OBJECT: { | |
1353 | size_t i, n; | |
1354 | ||
1355 | n = json_variant_elements(a); | |
1356 | if (n != json_variant_elements(b)) | |
1357 | return false; | |
1358 | ||
1359 | /* Iterate through all keys in 'a' */ | |
1360 | for (i = 0; i < n; i += 2) { | |
1361 | bool found = false; | |
1362 | size_t j; | |
1363 | ||
1364 | /* Match them against all keys in 'b' */ | |
1365 | for (j = 0; j < n; j += 2) { | |
1366 | JsonVariant *key_b; | |
1367 | ||
1368 | key_b = json_variant_by_index(b, j); | |
1369 | ||
1370 | /* During the first iteration unmark everything */ | |
1371 | if (i == 0) | |
1372 | key_b->is_marked = false; | |
1373 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1374 | continue; | |
1375 | ||
1376 | if (found) | |
1377 | continue; | |
1378 | ||
1379 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1380 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1381 | /* Key and values match! */ | |
1382 | key_b->is_marked = found = true; | |
1383 | ||
1384 | /* In the first iteration we continue the inner loop since we want to mark | |
1385 | * everything, otherwise exit the loop quickly after we found what we were | |
1386 | * looking for. */ | |
1387 | if (i != 0) | |
1388 | break; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | if (!found) | |
1393 | return false; | |
1394 | } | |
1395 | ||
1396 | return true; | |
1397 | } | |
1398 | ||
1399 | default: | |
1400 | assert_not_reached("Unknown variant type."); | |
1401 | } | |
1402 | } | |
1403 | ||
46cdbd49 BR |
1404 | void json_variant_sensitive(JsonVariant *v) { |
1405 | assert(v); | |
1406 | ||
1407 | /* Marks a variant as "sensitive", so that it is erased from memory when it is destroyed. This is a | |
1408 | * one-way operation: as soon as it is marked this way it remains marked this way until it's | |
a10f5d05 | 1409 | * destroyed. A magic variant is never sensitive though, even when asked, since it's too |
46cdbd49 BR |
1410 | * basic. Similar, const string variant are never sensitive either, after all they are included in |
1411 | * the source code as they are, which is not suitable for inclusion of secrets. | |
1412 | * | |
1413 | * Note that this flag has a recursive effect: when we destroy an object or array we'll propagate the | |
1414 | * flag to all contained variants. And if those are then destroyed this is propagated further down, | |
1415 | * and so on. */ | |
1416 | ||
1417 | v = json_variant_formalize(v); | |
1418 | if (!json_variant_is_regular(v)) | |
1419 | return; | |
1420 | ||
1421 | v->sensitive = true; | |
1422 | } | |
1423 | ||
a10f5d05 MB |
1424 | bool json_variant_is_sensitive(JsonVariant *v) { |
1425 | v = json_variant_formalize(v); | |
1426 | if (!json_variant_is_regular(v)) | |
1427 | return false; | |
1428 | ||
1429 | return v->sensitive; | |
1430 | } | |
1431 | ||
1432 | static void json_variant_propagate_sensitive(JsonVariant *from, JsonVariant *to) { | |
1433 | if (json_variant_is_sensitive(from)) | |
1434 | json_variant_sensitive(to); | |
1435 | } | |
1436 | ||
6e866b33 MB |
1437 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { |
1438 | assert_return(v, -EINVAL); | |
1439 | ||
1440 | if (ret_source) | |
1441 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; | |
1442 | ||
1443 | if (ret_line) | |
1444 | *ret_line = json_variant_is_regular(v) ? v->line : 0; | |
1445 | ||
1446 | if (ret_column) | |
1447 | *ret_column = json_variant_is_regular(v) ? v->column : 0; | |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { | |
1453 | size_t w, k; | |
1454 | ||
1455 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1456 | return 0; | |
1457 | ||
1458 | if (!json_variant_is_regular(v)) | |
1459 | return 0; | |
1460 | ||
1461 | if (!v->source && v->line == 0 && v->column == 0) | |
1462 | return 0; | |
1463 | ||
1464 | /* The max width we need to format the line numbers for this source file */ | |
1465 | w = (v->source && v->source->max_line > 0) ? | |
1466 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1467 | DECIMAL_STR_MAX(unsigned)-1; | |
1468 | k = (v->source && v->source->max_column > 0) ? | |
1469 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1470 | DECIMAL_STR_MAX(unsigned) -1; | |
1471 | ||
1472 | if (whitespace) { | |
1473 | size_t i, n; | |
1474 | ||
1475 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1476 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1477 | (v->line > 0 ? w : 0) + | |
1478 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1479 | (v->column > 0 ? k : 0) + | |
1480 | 2; | |
1481 | ||
1482 | for (i = 0; i < n; i++) | |
1483 | fputc(' ', f); | |
1484 | } else { | |
1485 | fputc('[', f); | |
1486 | ||
1487 | if (v->source) | |
1488 | fputs(v->source->name, f); | |
1489 | if (v->source && (v->line > 0 || v->column > 0)) | |
1490 | fputc(':', f); | |
1491 | if (v->line > 0) | |
1492 | fprintf(f, "%*u", (int) w, v->line); | |
1493 | if ((v->source || v->line > 0) || v->column > 0) | |
1494 | fputc(':', f); | |
1495 | if (v->column > 0) | |
1496 | fprintf(f, "%*u", (int) k, v->column); | |
1497 | ||
1498 | fputc(']', f); | |
1499 | fputc(' ', f); | |
1500 | } | |
1501 | ||
1502 | return 0; | |
1503 | } | |
1504 | ||
a032b68d MB |
1505 | static void json_format_string(FILE *f, const char *q, JsonFormatFlags flags) { |
1506 | assert(q); | |
1507 | ||
1508 | fputc('"', f); | |
1509 | ||
1510 | if (flags & JSON_FORMAT_COLOR) | |
3a6ce677 | 1511 | fputs(ansi_green(), f); |
a032b68d MB |
1512 | |
1513 | for (; *q; q++) | |
1514 | switch (*q) { | |
1515 | case '"': | |
1516 | fputs("\\\"", f); | |
1517 | break; | |
1518 | ||
1519 | case '\\': | |
1520 | fputs("\\\\", f); | |
1521 | break; | |
1522 | ||
1523 | case '\b': | |
1524 | fputs("\\b", f); | |
1525 | break; | |
1526 | ||
1527 | case '\f': | |
1528 | fputs("\\f", f); | |
1529 | break; | |
1530 | ||
1531 | case '\n': | |
1532 | fputs("\\n", f); | |
1533 | break; | |
1534 | ||
1535 | case '\r': | |
1536 | fputs("\\r", f); | |
1537 | break; | |
1538 | ||
1539 | case '\t': | |
1540 | fputs("\\t", f); | |
1541 | break; | |
1542 | ||
1543 | default: | |
1544 | if ((signed char) *q >= 0 && *q < ' ') | |
1545 | fprintf(f, "\\u%04x", *q); | |
1546 | else | |
1547 | fputc(*q, f); | |
1548 | break; | |
1549 | } | |
1550 | ||
1551 | if (flags & JSON_FORMAT_COLOR) | |
1552 | fputs(ANSI_NORMAL, f); | |
1553 | ||
1554 | fputc('"', f); | |
1555 | } | |
1556 | ||
6e866b33 MB |
1557 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
1558 | int r; | |
1559 | ||
1560 | assert(f); | |
1561 | assert(v); | |
1562 | ||
1563 | switch (json_variant_type(v)) { | |
1564 | ||
1565 | case JSON_VARIANT_REAL: { | |
1566 | locale_t loc; | |
1567 | ||
1568 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1569 | if (loc == (locale_t) 0) | |
1570 | return -errno; | |
1571 | ||
1572 | if (flags & JSON_FORMAT_COLOR) | |
3a6ce677 | 1573 | fputs(ansi_highlight_blue(), f); |
6e866b33 MB |
1574 | |
1575 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1576 | ||
1577 | if (flags & JSON_FORMAT_COLOR) | |
1578 | fputs(ANSI_NORMAL, f); | |
1579 | ||
1580 | freelocale(loc); | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | case JSON_VARIANT_INTEGER: | |
1585 | if (flags & JSON_FORMAT_COLOR) | |
3a6ce677 | 1586 | fputs(ansi_highlight_blue(), f); |
6e866b33 MB |
1587 | |
1588 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1589 | ||
1590 | if (flags & JSON_FORMAT_COLOR) | |
1591 | fputs(ANSI_NORMAL, f); | |
1592 | break; | |
1593 | ||
1594 | case JSON_VARIANT_UNSIGNED: | |
1595 | if (flags & JSON_FORMAT_COLOR) | |
3a6ce677 | 1596 | fputs(ansi_highlight_blue(), f); |
6e866b33 MB |
1597 | |
1598 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1599 | ||
1600 | if (flags & JSON_FORMAT_COLOR) | |
1601 | fputs(ANSI_NORMAL, f); | |
1602 | break; | |
1603 | ||
1604 | case JSON_VARIANT_BOOLEAN: | |
1605 | ||
1606 | if (flags & JSON_FORMAT_COLOR) | |
1607 | fputs(ANSI_HIGHLIGHT, f); | |
1608 | ||
1609 | if (json_variant_boolean(v)) | |
1610 | fputs("true", f); | |
1611 | else | |
1612 | fputs("false", f); | |
1613 | ||
1614 | if (flags & JSON_FORMAT_COLOR) | |
1615 | fputs(ANSI_NORMAL, f); | |
1616 | ||
1617 | break; | |
1618 | ||
1619 | case JSON_VARIANT_NULL: | |
1620 | if (flags & JSON_FORMAT_COLOR) | |
1621 | fputs(ANSI_HIGHLIGHT, f); | |
1622 | ||
1623 | fputs("null", f); | |
1624 | ||
1625 | if (flags & JSON_FORMAT_COLOR) | |
1626 | fputs(ANSI_NORMAL, f); | |
1627 | break; | |
1628 | ||
a032b68d MB |
1629 | case JSON_VARIANT_STRING: |
1630 | json_format_string(f, json_variant_string(v), flags); | |
6e866b33 | 1631 | break; |
6e866b33 MB |
1632 | |
1633 | case JSON_VARIANT_ARRAY: { | |
1634 | size_t i, n; | |
1635 | ||
1636 | n = json_variant_elements(v); | |
1637 | ||
1638 | if (n == 0) | |
1639 | fputs("[]", f); | |
1640 | else { | |
1641 | _cleanup_free_ char *joined = NULL; | |
1642 | const char *prefix2; | |
1643 | ||
1644 | if (flags & JSON_FORMAT_PRETTY) { | |
1645 | joined = strjoin(strempty(prefix), "\t"); | |
1646 | if (!joined) | |
1647 | return -ENOMEM; | |
1648 | ||
1649 | prefix2 = joined; | |
1650 | fputs("[\n", f); | |
1651 | } else { | |
1652 | prefix2 = strempty(prefix); | |
1653 | fputc('[', f); | |
1654 | } | |
1655 | ||
1656 | for (i = 0; i < n; i++) { | |
1657 | JsonVariant *e; | |
1658 | ||
1659 | assert_se(e = json_variant_by_index(v, i)); | |
1660 | ||
1661 | if (i > 0) { | |
1662 | if (flags & JSON_FORMAT_PRETTY) | |
1663 | fputs(",\n", f); | |
1664 | else | |
1665 | fputc(',', f); | |
1666 | } | |
1667 | ||
1668 | if (flags & JSON_FORMAT_PRETTY) { | |
1669 | print_source(f, e, flags, false); | |
1670 | fputs(prefix2, f); | |
1671 | } | |
1672 | ||
1673 | r = json_format(f, e, flags, prefix2); | |
1674 | if (r < 0) | |
1675 | return r; | |
1676 | } | |
1677 | ||
1678 | if (flags & JSON_FORMAT_PRETTY) { | |
1679 | fputc('\n', f); | |
1680 | print_source(f, v, flags, true); | |
1681 | fputs(strempty(prefix), f); | |
1682 | } | |
1683 | ||
1684 | fputc(']', f); | |
1685 | } | |
1686 | break; | |
1687 | } | |
1688 | ||
1689 | case JSON_VARIANT_OBJECT: { | |
1690 | size_t i, n; | |
1691 | ||
1692 | n = json_variant_elements(v); | |
1693 | ||
1694 | if (n == 0) | |
1695 | fputs("{}", f); | |
1696 | else { | |
1697 | _cleanup_free_ char *joined = NULL; | |
1698 | const char *prefix2; | |
1699 | ||
1700 | if (flags & JSON_FORMAT_PRETTY) { | |
1701 | joined = strjoin(strempty(prefix), "\t"); | |
1702 | if (!joined) | |
1703 | return -ENOMEM; | |
1704 | ||
1705 | prefix2 = joined; | |
1706 | fputs("{\n", f); | |
1707 | } else { | |
1708 | prefix2 = strempty(prefix); | |
1709 | fputc('{', f); | |
1710 | } | |
1711 | ||
1712 | for (i = 0; i < n; i += 2) { | |
1713 | JsonVariant *e; | |
1714 | ||
1715 | e = json_variant_by_index(v, i); | |
1716 | ||
1717 | if (i > 0) { | |
1718 | if (flags & JSON_FORMAT_PRETTY) | |
1719 | fputs(",\n", f); | |
1720 | else | |
1721 | fputc(',', f); | |
1722 | } | |
1723 | ||
1724 | if (flags & JSON_FORMAT_PRETTY) { | |
1725 | print_source(f, e, flags, false); | |
1726 | fputs(prefix2, f); | |
1727 | } | |
1728 | ||
1729 | r = json_format(f, e, flags, prefix2); | |
1730 | if (r < 0) | |
1731 | return r; | |
1732 | ||
1733 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1734 | ||
1735 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1736 | if (r < 0) | |
1737 | return r; | |
1738 | } | |
1739 | ||
1740 | if (flags & JSON_FORMAT_PRETTY) { | |
1741 | fputc('\n', f); | |
1742 | print_source(f, v, flags, true); | |
1743 | fputs(strempty(prefix), f); | |
1744 | } | |
1745 | ||
1746 | fputc('}', f); | |
1747 | } | |
1748 | break; | |
1749 | } | |
1750 | ||
1751 | default: | |
1752 | assert_not_reached("Unexpected variant type."); | |
1753 | } | |
1754 | ||
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { | |
1759 | _cleanup_free_ char *s = NULL; | |
1760 | size_t sz = 0; | |
1761 | int r; | |
1762 | ||
f2dec872 BR |
1763 | /* Returns the length of the generated string (without the terminating NUL), |
1764 | * or negative on error. */ | |
1765 | ||
6e866b33 MB |
1766 | assert_return(v, -EINVAL); |
1767 | assert_return(ret, -EINVAL); | |
1768 | ||
3a6ce677 BR |
1769 | if (flags & JSON_FORMAT_OFF) |
1770 | return -ENOEXEC; | |
1771 | ||
6e866b33 MB |
1772 | { |
1773 | _cleanup_fclose_ FILE *f = NULL; | |
1774 | ||
f2dec872 | 1775 | f = open_memstream_unlocked(&s, &sz); |
6e866b33 MB |
1776 | if (!f) |
1777 | return -ENOMEM; | |
1778 | ||
6e866b33 MB |
1779 | json_variant_dump(v, flags, f, NULL); |
1780 | ||
f2dec872 BR |
1781 | /* Add terminating 0, so that the output buffer is a valid string. */ |
1782 | fputc('\0', f); | |
1783 | ||
6e866b33 MB |
1784 | r = fflush_and_check(f); |
1785 | } | |
1786 | if (r < 0) | |
1787 | return r; | |
1788 | ||
1789 | assert(s); | |
1790 | *ret = TAKE_PTR(s); | |
f2dec872 BR |
1791 | assert(sz > 0); |
1792 | return (int) sz - 1; | |
6e866b33 MB |
1793 | } |
1794 | ||
1795 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { | |
1796 | if (!v) | |
1797 | return; | |
1798 | ||
1799 | if (!f) | |
1800 | f = stdout; | |
1801 | ||
1802 | print_source(f, v, flags, false); | |
1803 | ||
1804 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) | |
1805 | flags |= JSON_FORMAT_COLOR; | |
1806 | ||
46cdbd49 BR |
1807 | if (((flags & (JSON_FORMAT_PRETTY_AUTO|JSON_FORMAT_PRETTY)) == JSON_FORMAT_PRETTY_AUTO)) |
1808 | flags |= on_tty() ? JSON_FORMAT_PRETTY : JSON_FORMAT_NEWLINE; | |
1809 | ||
6e866b33 MB |
1810 | if (flags & JSON_FORMAT_SSE) |
1811 | fputs("data: ", f); | |
1812 | if (flags & JSON_FORMAT_SEQ) | |
1813 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1814 | ||
1815 | json_format(f, v, flags, prefix); | |
1816 | ||
1817 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1818 | fputc('\n', f); | |
1819 | if (flags & JSON_FORMAT_SSE) | |
1820 | fputc('\n', f); /* In case of SSE add a second newline */ | |
46cdbd49 BR |
1821 | |
1822 | if (flags & JSON_FORMAT_FLUSH) | |
1823 | fflush(f); | |
1824 | } | |
1825 | ||
1826 | int json_variant_filter(JsonVariant **v, char **to_remove) { | |
1827 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
1828 | _cleanup_free_ JsonVariant **array = NULL; | |
1829 | size_t i, n = 0, k = 0; | |
1830 | int r; | |
1831 | ||
1832 | assert(v); | |
1833 | ||
1834 | if (json_variant_is_blank_object(*v)) | |
1835 | return 0; | |
1836 | if (!json_variant_is_object(*v)) | |
1837 | return -EINVAL; | |
1838 | ||
1839 | if (strv_isempty(to_remove)) | |
1840 | return 0; | |
1841 | ||
1842 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1843 | JsonVariant *p; | |
1844 | ||
1845 | p = json_variant_by_index(*v, i); | |
1846 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1847 | return -EINVAL; | |
1848 | ||
1849 | if (strv_contains(to_remove, json_variant_string(p))) { | |
1850 | if (!array) { | |
1851 | array = new(JsonVariant*, json_variant_elements(*v) - 2); | |
1852 | if (!array) | |
1853 | return -ENOMEM; | |
1854 | ||
1855 | for (k = 0; k < i; k++) | |
1856 | array[k] = json_variant_by_index(*v, k); | |
1857 | } | |
1858 | ||
1859 | n++; | |
1860 | } else if (array) { | |
1861 | array[k++] = p; | |
1862 | array[k++] = json_variant_by_index(*v, i + 1); | |
1863 | } | |
1864 | } | |
1865 | ||
1866 | if (n == 0) | |
1867 | return 0; | |
1868 | ||
1869 | r = json_variant_new_object(&w, array, k); | |
1870 | if (r < 0) | |
1871 | return r; | |
1872 | ||
a10f5d05 MB |
1873 | json_variant_propagate_sensitive(*v, w); |
1874 | ||
46cdbd49 BR |
1875 | json_variant_unref(*v); |
1876 | *v = TAKE_PTR(w); | |
1877 | ||
1878 | return (int) n; | |
1879 | } | |
1880 | ||
1881 | int json_variant_set_field(JsonVariant **v, const char *field, JsonVariant *value) { | |
1882 | _cleanup_(json_variant_unrefp) JsonVariant *field_variant = NULL, *w = NULL; | |
1883 | _cleanup_free_ JsonVariant **array = NULL; | |
1884 | size_t i, k = 0; | |
1885 | int r; | |
1886 | ||
1887 | assert(v); | |
1888 | assert(field); | |
1889 | ||
1890 | if (json_variant_is_blank_object(*v)) { | |
1891 | array = new(JsonVariant*, 2); | |
1892 | if (!array) | |
1893 | return -ENOMEM; | |
1894 | ||
1895 | } else { | |
1896 | if (!json_variant_is_object(*v)) | |
1897 | return -EINVAL; | |
1898 | ||
1899 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1900 | JsonVariant *p; | |
1901 | ||
1902 | p = json_variant_by_index(*v, i); | |
1903 | if (!json_variant_is_string(p)) | |
1904 | return -EINVAL; | |
1905 | ||
1906 | if (streq(json_variant_string(p), field)) { | |
1907 | ||
1908 | if (!array) { | |
1909 | array = new(JsonVariant*, json_variant_elements(*v)); | |
1910 | if (!array) | |
1911 | return -ENOMEM; | |
1912 | ||
1913 | for (k = 0; k < i; k++) | |
1914 | array[k] = json_variant_by_index(*v, k); | |
1915 | } | |
1916 | ||
1917 | } else if (array) { | |
1918 | array[k++] = p; | |
1919 | array[k++] = json_variant_by_index(*v, i + 1); | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | if (!array) { | |
1924 | array = new(JsonVariant*, json_variant_elements(*v) + 2); | |
1925 | if (!array) | |
1926 | return -ENOMEM; | |
1927 | ||
1928 | for (k = 0; k < json_variant_elements(*v); k++) | |
1929 | array[k] = json_variant_by_index(*v, k); | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | r = json_variant_new_string(&field_variant, field); | |
1934 | if (r < 0) | |
1935 | return r; | |
1936 | ||
1937 | array[k++] = field_variant; | |
1938 | array[k++] = value; | |
1939 | ||
1940 | r = json_variant_new_object(&w, array, k); | |
1941 | if (r < 0) | |
1942 | return r; | |
1943 | ||
a10f5d05 MB |
1944 | json_variant_propagate_sensitive(*v, w); |
1945 | ||
46cdbd49 BR |
1946 | json_variant_unref(*v); |
1947 | *v = TAKE_PTR(w); | |
1948 | ||
1949 | return 1; | |
1950 | } | |
1951 | ||
1952 | int json_variant_set_field_string(JsonVariant **v, const char *field, const char *value) { | |
1953 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1954 | int r; | |
1955 | ||
1956 | r = json_variant_new_string(&m, value); | |
1957 | if (r < 0) | |
1958 | return r; | |
1959 | ||
1960 | return json_variant_set_field(v, field, m); | |
1961 | } | |
1962 | ||
1963 | int json_variant_set_field_integer(JsonVariant **v, const char *field, intmax_t i) { | |
1964 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1965 | int r; | |
1966 | ||
1967 | r = json_variant_new_integer(&m, i); | |
1968 | if (r < 0) | |
1969 | return r; | |
1970 | ||
1971 | return json_variant_set_field(v, field, m); | |
1972 | } | |
1973 | ||
1974 | int json_variant_set_field_unsigned(JsonVariant **v, const char *field, uintmax_t u) { | |
1975 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1976 | int r; | |
1977 | ||
1978 | r = json_variant_new_unsigned(&m, u); | |
1979 | if (r < 0) | |
1980 | return r; | |
1981 | ||
1982 | return json_variant_set_field(v, field, m); | |
1983 | } | |
1984 | ||
1985 | int json_variant_set_field_boolean(JsonVariant **v, const char *field, bool b) { | |
1986 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1987 | int r; | |
1988 | ||
1989 | r = json_variant_new_boolean(&m, b); | |
1990 | if (r < 0) | |
1991 | return r; | |
1992 | ||
1993 | return json_variant_set_field(v, field, m); | |
1994 | } | |
1995 | ||
a032b68d MB |
1996 | int json_variant_set_field_strv(JsonVariant **v, const char *field, char **l) { |
1997 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1998 | int r; | |
1999 | ||
2000 | r = json_variant_new_array_strv(&m, l); | |
2001 | if (r < 0) | |
2002 | return r; | |
2003 | ||
2004 | return json_variant_set_field(v, field, m); | |
2005 | } | |
2006 | ||
46cdbd49 BR |
2007 | int json_variant_merge(JsonVariant **v, JsonVariant *m) { |
2008 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
2009 | _cleanup_free_ JsonVariant **array = NULL; | |
2010 | size_t v_elements, m_elements, i, k; | |
2011 | bool v_blank, m_blank; | |
2012 | int r; | |
2013 | ||
2014 | m = json_variant_dereference(m); | |
2015 | ||
2016 | v_blank = json_variant_is_blank_object(*v); | |
2017 | m_blank = json_variant_is_blank_object(m); | |
2018 | ||
2019 | if (!v_blank && !json_variant_is_object(*v)) | |
2020 | return -EINVAL; | |
2021 | if (!m_blank && !json_variant_is_object(m)) | |
2022 | return -EINVAL; | |
2023 | ||
2024 | if (m_blank) | |
2025 | return 0; /* nothing to do */ | |
2026 | ||
2027 | if (v_blank) { | |
2028 | json_variant_unref(*v); | |
2029 | *v = json_variant_ref(m); | |
2030 | return 1; | |
2031 | } | |
2032 | ||
2033 | v_elements = json_variant_elements(*v); | |
2034 | m_elements = json_variant_elements(m); | |
2035 | if (v_elements > SIZE_MAX - m_elements) /* overflow check */ | |
2036 | return -ENOMEM; | |
2037 | ||
2038 | array = new(JsonVariant*, v_elements + m_elements); | |
2039 | if (!array) | |
2040 | return -ENOMEM; | |
2041 | ||
2042 | k = 0; | |
2043 | for (i = 0; i < v_elements; i += 2) { | |
2044 | JsonVariant *u; | |
2045 | ||
2046 | u = json_variant_by_index(*v, i); | |
2047 | if (!json_variant_is_string(u)) | |
2048 | return -EINVAL; | |
2049 | ||
2050 | if (json_variant_by_key(m, json_variant_string(u))) | |
2051 | continue; /* skip if exists in second variant */ | |
2052 | ||
2053 | array[k++] = u; | |
2054 | array[k++] = json_variant_by_index(*v, i + 1); | |
2055 | } | |
2056 | ||
2057 | for (i = 0; i < m_elements; i++) | |
2058 | array[k++] = json_variant_by_index(m, i); | |
2059 | ||
2060 | r = json_variant_new_object(&w, array, k); | |
2061 | if (r < 0) | |
2062 | return r; | |
2063 | ||
a10f5d05 MB |
2064 | json_variant_propagate_sensitive(*v, w); |
2065 | json_variant_propagate_sensitive(m, w); | |
2066 | ||
46cdbd49 BR |
2067 | json_variant_unref(*v); |
2068 | *v = TAKE_PTR(w); | |
2069 | ||
2070 | return 1; | |
2071 | } | |
2072 | ||
2073 | int json_variant_append_array(JsonVariant **v, JsonVariant *element) { | |
2074 | _cleanup_(json_variant_unrefp) JsonVariant *nv = NULL; | |
2075 | bool blank; | |
2076 | int r; | |
2077 | ||
2078 | assert(v); | |
2079 | assert(element); | |
2080 | ||
2081 | ||
2082 | if (!*v || json_variant_is_null(*v)) | |
2083 | blank = true; | |
2084 | else if (!json_variant_is_array(*v)) | |
2085 | return -EINVAL; | |
2086 | else | |
2087 | blank = json_variant_elements(*v) == 0; | |
2088 | ||
2089 | if (blank) | |
2090 | r = json_variant_new_array(&nv, (JsonVariant*[]) { element }, 1); | |
2091 | else { | |
2092 | _cleanup_free_ JsonVariant **array = NULL; | |
2093 | size_t i; | |
2094 | ||
2095 | array = new(JsonVariant*, json_variant_elements(*v) + 1); | |
2096 | if (!array) | |
2097 | return -ENOMEM; | |
2098 | ||
2099 | for (i = 0; i < json_variant_elements(*v); i++) | |
2100 | array[i] = json_variant_by_index(*v, i); | |
2101 | ||
2102 | array[i] = element; | |
2103 | ||
2104 | r = json_variant_new_array(&nv, array, i + 1); | |
2105 | } | |
46cdbd49 BR |
2106 | if (r < 0) |
2107 | return r; | |
2108 | ||
a10f5d05 MB |
2109 | json_variant_propagate_sensitive(*v, nv); |
2110 | ||
46cdbd49 BR |
2111 | json_variant_unref(*v); |
2112 | *v = TAKE_PTR(nv); | |
2113 | ||
2114 | return 0; | |
2115 | } | |
2116 | ||
2117 | int json_variant_strv(JsonVariant *v, char ***ret) { | |
2118 | char **l = NULL; | |
2119 | size_t n, i; | |
2120 | bool sensitive; | |
2121 | int r; | |
2122 | ||
2123 | assert(ret); | |
2124 | ||
2125 | if (!v || json_variant_is_null(v)) { | |
2126 | l = new0(char*, 1); | |
2127 | if (!l) | |
2128 | return -ENOMEM; | |
2129 | ||
2130 | *ret = l; | |
2131 | return 0; | |
2132 | } | |
2133 | ||
2134 | if (!json_variant_is_array(v)) | |
2135 | return -EINVAL; | |
2136 | ||
2137 | sensitive = v->sensitive; | |
2138 | ||
2139 | n = json_variant_elements(v); | |
2140 | l = new(char*, n+1); | |
2141 | if (!l) | |
2142 | return -ENOMEM; | |
2143 | ||
2144 | for (i = 0; i < n; i++) { | |
2145 | JsonVariant *e; | |
2146 | ||
2147 | assert_se(e = json_variant_by_index(v, i)); | |
2148 | sensitive = sensitive || e->sensitive; | |
2149 | ||
2150 | if (!json_variant_is_string(e)) { | |
2151 | l[i] = NULL; | |
2152 | r = -EINVAL; | |
2153 | goto fail; | |
2154 | } | |
2155 | ||
2156 | l[i] = strdup(json_variant_string(e)); | |
2157 | if (!l[i]) { | |
2158 | r = -ENOMEM; | |
2159 | goto fail; | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | l[i] = NULL; | |
2164 | *ret = TAKE_PTR(l); | |
2165 | ||
2166 | return 0; | |
2167 | ||
2168 | fail: | |
2169 | if (sensitive) | |
2170 | strv_free_erase(l); | |
2171 | else | |
2172 | strv_free(l); | |
2173 | ||
2174 | return r; | |
6e866b33 MB |
2175 | } |
2176 | ||
2177 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { | |
2178 | JsonVariantType t; | |
2179 | JsonVariant *c; | |
2180 | JsonValue value; | |
2181 | const void *source; | |
2182 | size_t k; | |
2183 | ||
2184 | assert(nv); | |
2185 | assert(v); | |
2186 | ||
2187 | /* Let's copy the simple types literally, and the larger types by references */ | |
2188 | t = json_variant_type(v); | |
2189 | switch (t) { | |
2190 | case JSON_VARIANT_INTEGER: | |
2191 | k = sizeof(intmax_t); | |
2192 | value.integer = json_variant_integer(v); | |
2193 | source = &value; | |
2194 | break; | |
2195 | ||
2196 | case JSON_VARIANT_UNSIGNED: | |
2197 | k = sizeof(uintmax_t); | |
2198 | value.unsig = json_variant_unsigned(v); | |
2199 | source = &value; | |
2200 | break; | |
2201 | ||
2202 | case JSON_VARIANT_REAL: | |
2203 | k = sizeof(long double); | |
2204 | value.real = json_variant_real(v); | |
2205 | source = &value; | |
2206 | break; | |
2207 | ||
2208 | case JSON_VARIANT_BOOLEAN: | |
2209 | k = sizeof(bool); | |
2210 | value.boolean = json_variant_boolean(v); | |
2211 | source = &value; | |
2212 | break; | |
2213 | ||
2214 | case JSON_VARIANT_NULL: | |
2215 | k = 0; | |
2216 | source = NULL; | |
2217 | break; | |
2218 | ||
2219 | case JSON_VARIANT_STRING: | |
2220 | source = json_variant_string(v); | |
2221 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
2222 | if (k <= INLINE_STRING_MAX) { | |
2223 | k ++; | |
2224 | break; | |
2225 | } | |
2226 | ||
2227 | _fallthrough_; | |
2228 | ||
2229 | default: | |
2230 | /* Everything else copy by reference */ | |
2231 | ||
f2dec872 BR |
2232 | c = malloc0(MAX(sizeof(JsonVariant), |
2233 | offsetof(JsonVariant, reference) + sizeof(JsonVariant*))); | |
6e866b33 MB |
2234 | if (!c) |
2235 | return -ENOMEM; | |
2236 | ||
2237 | c->n_ref = 1; | |
2238 | c->type = t; | |
2239 | c->is_reference = true; | |
46cdbd49 | 2240 | c->reference = json_variant_ref(json_variant_formalize(v)); |
6e866b33 MB |
2241 | |
2242 | *nv = c; | |
2243 | return 0; | |
2244 | } | |
2245 | ||
f2dec872 BR |
2246 | c = malloc0(MAX(sizeof(JsonVariant), |
2247 | offsetof(JsonVariant, value) + k)); | |
6e866b33 MB |
2248 | if (!c) |
2249 | return -ENOMEM; | |
2250 | ||
2251 | c->n_ref = 1; | |
2252 | c->type = t; | |
2253 | ||
2254 | memcpy_safe(&c->value, source, k); | |
2255 | ||
a10f5d05 MB |
2256 | json_variant_propagate_sensitive(v, c); |
2257 | ||
6e866b33 MB |
2258 | *nv = c; |
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | static bool json_single_ref(JsonVariant *v) { | |
2263 | ||
2264 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
2265 | ||
2266 | if (!json_variant_is_regular(v)) | |
2267 | return false; | |
2268 | ||
2269 | if (v->is_embedded) | |
2270 | return json_single_ref(v->parent); | |
2271 | ||
2272 | assert(v->n_ref > 0); | |
2273 | return v->n_ref == 1; | |
2274 | } | |
2275 | ||
2276 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
2277 | JsonVariant *w; | |
2278 | int r; | |
2279 | ||
2280 | assert(v); | |
2281 | ||
2282 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
2283 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
2284 | ||
2285 | if (!*v) | |
2286 | return 0; | |
2287 | ||
2288 | if (source && line > source->max_line) | |
2289 | source->max_line = line; | |
2290 | if (source && column > source->max_column) | |
2291 | source->max_column = column; | |
2292 | ||
2293 | if (!json_variant_is_regular(*v)) { | |
2294 | ||
2295 | if (!source && line == 0 && column == 0) | |
2296 | return 0; | |
2297 | ||
2298 | } else { | |
2299 | if (json_source_equal((*v)->source, source) && | |
2300 | (*v)->line == line && | |
2301 | (*v)->column == column) | |
2302 | return 0; | |
2303 | ||
2304 | if (json_single_ref(*v)) { /* Sole reference? */ | |
2305 | json_source_unref((*v)->source); | |
2306 | (*v)->source = json_source_ref(source); | |
2307 | (*v)->line = line; | |
2308 | (*v)->column = column; | |
2309 | return 1; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | r = json_variant_copy(&w, *v); | |
2314 | if (r < 0) | |
2315 | return r; | |
2316 | ||
2317 | assert(json_variant_is_regular(w)); | |
2318 | assert(!w->is_embedded); | |
2319 | assert(w->n_ref == 1); | |
2320 | assert(!w->source); | |
2321 | ||
2322 | w->source = json_source_ref(source); | |
2323 | w->line = line; | |
2324 | w->column = column; | |
2325 | ||
2326 | json_variant_unref(*v); | |
2327 | *v = w; | |
2328 | ||
2329 | return 1; | |
2330 | } | |
2331 | ||
2332 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
2333 | assert(line); | |
2334 | assert(column); | |
2335 | assert(s || n == 0); | |
2336 | ||
2337 | while (n > 0) { | |
6e866b33 MB |
2338 | if (*s == '\n') { |
2339 | (*line)++; | |
2340 | *column = 1; | |
2341 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ | |
2342 | (*column)++; | |
2343 | else { | |
2344 | int w; | |
2345 | ||
bb4f798a | 2346 | w = utf8_encoded_valid_unichar(s, n); |
6e866b33 MB |
2347 | if (w < 0) /* count invalid unichars as normal characters */ |
2348 | w = 1; | |
2349 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
2350 | w = (int) n; | |
2351 | ||
2352 | (*column)++; | |
2353 | ||
2354 | s += w; | |
2355 | n -= w; | |
2356 | continue; | |
2357 | } | |
2358 | ||
2359 | s++; | |
2360 | n--; | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
2365 | int aa, bb, cc, dd; | |
2366 | uint16_t x; | |
2367 | ||
2368 | assert(c); | |
2369 | assert(ret); | |
2370 | ||
2371 | aa = unhexchar(c[0]); | |
2372 | if (aa < 0) | |
2373 | return -EINVAL; | |
2374 | ||
2375 | bb = unhexchar(c[1]); | |
2376 | if (bb < 0) | |
2377 | return -EINVAL; | |
2378 | ||
2379 | cc = unhexchar(c[2]); | |
2380 | if (cc < 0) | |
2381 | return -EINVAL; | |
2382 | ||
2383 | dd = unhexchar(c[3]); | |
2384 | if (dd < 0) | |
2385 | return -EINVAL; | |
2386 | ||
2387 | x = ((uint16_t) aa << 12) | | |
2388 | ((uint16_t) bb << 8) | | |
2389 | ((uint16_t) cc << 4) | | |
2390 | ((uint16_t) dd); | |
2391 | ||
2392 | if (x <= 0) | |
2393 | return -EINVAL; | |
2394 | ||
2395 | *ret = x; | |
2396 | ||
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | static int json_parse_string(const char **p, char **ret) { | |
2401 | _cleanup_free_ char *s = NULL; | |
8b3d4ff0 | 2402 | size_t n = 0; |
6e866b33 MB |
2403 | const char *c; |
2404 | ||
2405 | assert(p); | |
2406 | assert(*p); | |
2407 | assert(ret); | |
2408 | ||
2409 | c = *p; | |
2410 | ||
2411 | if (*c != '"') | |
2412 | return -EINVAL; | |
2413 | ||
2414 | c++; | |
2415 | ||
2416 | for (;;) { | |
2417 | int len; | |
2418 | ||
2419 | /* Check for EOF */ | |
2420 | if (*c == 0) | |
2421 | return -EINVAL; | |
2422 | ||
2423 | /* Check for control characters 0x00..0x1f */ | |
2424 | if (*c > 0 && *c < ' ') | |
2425 | return -EINVAL; | |
2426 | ||
2427 | /* Check for control character 0x7f */ | |
2428 | if (*c == 0x7f) | |
2429 | return -EINVAL; | |
2430 | ||
2431 | if (*c == '"') { | |
2432 | if (!s) { | |
2433 | s = strdup(""); | |
2434 | if (!s) | |
2435 | return -ENOMEM; | |
2436 | } else | |
2437 | s[n] = 0; | |
2438 | ||
2439 | *p = c + 1; | |
2440 | ||
2441 | *ret = TAKE_PTR(s); | |
2442 | return JSON_TOKEN_STRING; | |
2443 | } | |
2444 | ||
2445 | if (*c == '\\') { | |
2446 | char ch = 0; | |
2447 | c++; | |
2448 | ||
2449 | if (*c == 0) | |
2450 | return -EINVAL; | |
2451 | ||
2452 | if (IN_SET(*c, '"', '\\', '/')) | |
2453 | ch = *c; | |
2454 | else if (*c == 'b') | |
2455 | ch = '\b'; | |
2456 | else if (*c == 'f') | |
2457 | ch = '\f'; | |
2458 | else if (*c == 'n') | |
2459 | ch = '\n'; | |
2460 | else if (*c == 'r') | |
2461 | ch = '\r'; | |
2462 | else if (*c == 't') | |
2463 | ch = '\t'; | |
2464 | else if (*c == 'u') { | |
2465 | char16_t x; | |
2466 | int r; | |
2467 | ||
2468 | r = unhex_ucs2(c + 1, &x); | |
2469 | if (r < 0) | |
2470 | return r; | |
2471 | ||
2472 | c += 5; | |
2473 | ||
8b3d4ff0 | 2474 | if (!GREEDY_REALLOC(s, n + 5)) |
6e866b33 MB |
2475 | return -ENOMEM; |
2476 | ||
2477 | if (!utf16_is_surrogate(x)) | |
2478 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
2479 | else if (utf16_is_trailing_surrogate(x)) | |
2480 | return -EINVAL; | |
2481 | else { | |
2482 | char16_t y; | |
2483 | ||
2484 | if (c[0] != '\\' || c[1] != 'u') | |
2485 | return -EINVAL; | |
2486 | ||
2487 | r = unhex_ucs2(c + 2, &y); | |
2488 | if (r < 0) | |
2489 | return r; | |
2490 | ||
2491 | c += 6; | |
2492 | ||
2493 | if (!utf16_is_trailing_surrogate(y)) | |
2494 | return -EINVAL; | |
2495 | ||
2496 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
2497 | } | |
2498 | ||
2499 | continue; | |
2500 | } else | |
2501 | return -EINVAL; | |
2502 | ||
8b3d4ff0 | 2503 | if (!GREEDY_REALLOC(s, n + 2)) |
6e866b33 MB |
2504 | return -ENOMEM; |
2505 | ||
2506 | s[n++] = ch; | |
2507 | c ++; | |
2508 | continue; | |
2509 | } | |
2510 | ||
3a6ce677 | 2511 | len = utf8_encoded_valid_unichar(c, SIZE_MAX); |
6e866b33 MB |
2512 | if (len < 0) |
2513 | return len; | |
2514 | ||
8b3d4ff0 | 2515 | if (!GREEDY_REALLOC(s, n + len + 1)) |
6e866b33 MB |
2516 | return -ENOMEM; |
2517 | ||
2518 | memcpy(s + n, c, len); | |
2519 | n += len; | |
2520 | c += len; | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | static int json_parse_number(const char **p, JsonValue *ret) { | |
2525 | bool negative = false, exponent_negative = false, is_real = false; | |
2526 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
2527 | intmax_t i = 0; | |
2528 | uintmax_t u = 0; | |
2529 | const char *c; | |
2530 | ||
2531 | assert(p); | |
2532 | assert(*p); | |
2533 | assert(ret); | |
2534 | ||
2535 | c = *p; | |
2536 | ||
2537 | if (*c == '-') { | |
2538 | negative = true; | |
2539 | c++; | |
2540 | } | |
2541 | ||
2542 | if (*c == '0') | |
2543 | c++; | |
2544 | else { | |
2545 | if (!strchr("123456789", *c) || *c == 0) | |
2546 | return -EINVAL; | |
2547 | ||
2548 | do { | |
2549 | if (!is_real) { | |
2550 | if (negative) { | |
2551 | ||
2552 | if (i < INTMAX_MIN / 10) /* overflow */ | |
2553 | is_real = true; | |
2554 | else { | |
2555 | intmax_t t = 10 * i; | |
2556 | ||
2557 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
2558 | is_real = true; | |
2559 | else | |
2560 | i = t - (*c - '0'); | |
2561 | } | |
2562 | } else { | |
2563 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
2564 | is_real = true; | |
2565 | else { | |
2566 | uintmax_t t = 10 * u; | |
2567 | ||
2568 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
2569 | is_real = true; | |
2570 | else | |
2571 | u = t + (*c - '0'); | |
2572 | } | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | x = 10.0 * x + (*c - '0'); | |
2577 | ||
2578 | c++; | |
2579 | } while (strchr("0123456789", *c) && *c != 0); | |
2580 | } | |
2581 | ||
2582 | if (*c == '.') { | |
2583 | is_real = true; | |
2584 | c++; | |
2585 | ||
2586 | if (!strchr("0123456789", *c) || *c == 0) | |
2587 | return -EINVAL; | |
2588 | ||
2589 | do { | |
2590 | y = 10.0 * y + (*c - '0'); | |
2591 | shift = 10.0 * shift; | |
2592 | c++; | |
2593 | } while (strchr("0123456789", *c) && *c != 0); | |
2594 | } | |
2595 | ||
2596 | if (IN_SET(*c, 'e', 'E')) { | |
2597 | is_real = true; | |
2598 | c++; | |
2599 | ||
2600 | if (*c == '-') { | |
2601 | exponent_negative = true; | |
2602 | c++; | |
2603 | } else if (*c == '+') | |
2604 | c++; | |
2605 | ||
2606 | if (!strchr("0123456789", *c) || *c == 0) | |
2607 | return -EINVAL; | |
2608 | ||
2609 | do { | |
2610 | exponent = 10.0 * exponent + (*c - '0'); | |
2611 | c++; | |
2612 | } while (strchr("0123456789", *c) && *c != 0); | |
2613 | } | |
2614 | ||
2615 | *p = c; | |
2616 | ||
2617 | if (is_real) { | |
2618 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2619 | return JSON_TOKEN_REAL; | |
2620 | } else if (negative) { | |
2621 | ret->integer = i; | |
2622 | return JSON_TOKEN_INTEGER; | |
2623 | } else { | |
2624 | ret->unsig = u; | |
2625 | return JSON_TOKEN_UNSIGNED; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | int json_tokenize( | |
2630 | const char **p, | |
2631 | char **ret_string, | |
2632 | JsonValue *ret_value, | |
2633 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2634 | unsigned *ret_column, | |
2635 | void **state, | |
2636 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2637 | unsigned *column) { | |
2638 | ||
2639 | unsigned start_line, start_column; | |
2640 | const char *start, *c; | |
2641 | size_t n; | |
2642 | int t, r; | |
2643 | ||
2644 | enum { | |
2645 | STATE_NULL, | |
2646 | STATE_VALUE, | |
2647 | STATE_VALUE_POST, | |
2648 | }; | |
2649 | ||
2650 | assert(p); | |
2651 | assert(*p); | |
2652 | assert(ret_string); | |
2653 | assert(ret_value); | |
2654 | assert(ret_line); | |
2655 | assert(ret_column); | |
2656 | assert(line); | |
2657 | assert(column); | |
2658 | assert(state); | |
2659 | ||
2660 | t = PTR_TO_INT(*state); | |
2661 | if (t == STATE_NULL) { | |
2662 | *line = 1; | |
2663 | *column = 1; | |
2664 | t = STATE_VALUE; | |
2665 | } | |
2666 | ||
2667 | /* Skip over the whitespace */ | |
2668 | n = strspn(*p, WHITESPACE); | |
2669 | inc_lines_columns(line, column, *p, n); | |
2670 | c = *p + n; | |
2671 | ||
2672 | /* Remember where we started processing this token */ | |
2673 | start = c; | |
2674 | start_line = *line; | |
2675 | start_column = *column; | |
2676 | ||
2677 | if (*c == 0) { | |
2678 | *ret_string = NULL; | |
2679 | *ret_value = JSON_VALUE_NULL; | |
2680 | r = JSON_TOKEN_END; | |
2681 | goto finish; | |
2682 | } | |
2683 | ||
2684 | switch (t) { | |
2685 | ||
2686 | case STATE_VALUE: | |
2687 | ||
2688 | if (*c == '{') { | |
2689 | c++; | |
2690 | *state = INT_TO_PTR(STATE_VALUE); | |
2691 | r = JSON_TOKEN_OBJECT_OPEN; | |
2692 | goto null_return; | |
2693 | ||
2694 | } else if (*c == '}') { | |
2695 | c++; | |
2696 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2697 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2698 | goto null_return; | |
2699 | ||
2700 | } else if (*c == '[') { | |
2701 | c++; | |
2702 | *state = INT_TO_PTR(STATE_VALUE); | |
2703 | r = JSON_TOKEN_ARRAY_OPEN; | |
2704 | goto null_return; | |
2705 | ||
2706 | } else if (*c == ']') { | |
2707 | c++; | |
2708 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2709 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2710 | goto null_return; | |
2711 | ||
2712 | } else if (*c == '"') { | |
2713 | ||
2714 | r = json_parse_string(&c, ret_string); | |
2715 | if (r < 0) | |
2716 | return r; | |
2717 | ||
2718 | *ret_value = JSON_VALUE_NULL; | |
2719 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2720 | goto finish; | |
2721 | ||
2722 | } else if (strchr("-0123456789", *c)) { | |
2723 | ||
2724 | r = json_parse_number(&c, ret_value); | |
2725 | if (r < 0) | |
2726 | return r; | |
2727 | ||
2728 | *ret_string = NULL; | |
2729 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2730 | goto finish; | |
2731 | ||
2732 | } else if (startswith(c, "true")) { | |
2733 | *ret_string = NULL; | |
2734 | ret_value->boolean = true; | |
2735 | c += 4; | |
2736 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2737 | r = JSON_TOKEN_BOOLEAN; | |
2738 | goto finish; | |
2739 | ||
2740 | } else if (startswith(c, "false")) { | |
2741 | *ret_string = NULL; | |
2742 | ret_value->boolean = false; | |
2743 | c += 5; | |
2744 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2745 | r = JSON_TOKEN_BOOLEAN; | |
2746 | goto finish; | |
2747 | ||
2748 | } else if (startswith(c, "null")) { | |
2749 | *ret_string = NULL; | |
2750 | *ret_value = JSON_VALUE_NULL; | |
2751 | c += 4; | |
2752 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2753 | r = JSON_TOKEN_NULL; | |
2754 | goto finish; | |
2755 | ||
2756 | } | |
2757 | ||
2758 | return -EINVAL; | |
2759 | ||
2760 | case STATE_VALUE_POST: | |
2761 | ||
2762 | if (*c == ':') { | |
2763 | c++; | |
2764 | *state = INT_TO_PTR(STATE_VALUE); | |
2765 | r = JSON_TOKEN_COLON; | |
2766 | goto null_return; | |
2767 | ||
2768 | } else if (*c == ',') { | |
2769 | c++; | |
2770 | *state = INT_TO_PTR(STATE_VALUE); | |
2771 | r = JSON_TOKEN_COMMA; | |
2772 | goto null_return; | |
2773 | ||
2774 | } else if (*c == '}') { | |
2775 | c++; | |
2776 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2777 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2778 | goto null_return; | |
2779 | ||
2780 | } else if (*c == ']') { | |
2781 | c++; | |
2782 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2783 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2784 | goto null_return; | |
2785 | } | |
2786 | ||
2787 | return -EINVAL; | |
2788 | ||
2789 | default: | |
2790 | assert_not_reached("Unexpected tokenizer state"); | |
2791 | } | |
2792 | ||
2793 | null_return: | |
2794 | *ret_string = NULL; | |
2795 | *ret_value = JSON_VALUE_NULL; | |
2796 | ||
2797 | finish: | |
2798 | inc_lines_columns(line, column, start, c - start); | |
2799 | *p = c; | |
2800 | ||
2801 | *ret_line = start_line; | |
2802 | *ret_column = start_column; | |
2803 | ||
2804 | return r; | |
2805 | } | |
2806 | ||
2807 | typedef enum JsonExpect { | |
2808 | /* The following values are used by json_parse() */ | |
2809 | EXPECT_TOPLEVEL, | |
2810 | EXPECT_END, | |
2811 | EXPECT_OBJECT_FIRST_KEY, | |
2812 | EXPECT_OBJECT_NEXT_KEY, | |
2813 | EXPECT_OBJECT_COLON, | |
2814 | EXPECT_OBJECT_VALUE, | |
2815 | EXPECT_OBJECT_COMMA, | |
2816 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2817 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2818 | EXPECT_ARRAY_COMMA, | |
2819 | ||
2820 | /* And these are used by json_build() */ | |
2821 | EXPECT_ARRAY_ELEMENT, | |
2822 | EXPECT_OBJECT_KEY, | |
2823 | } JsonExpect; | |
2824 | ||
2825 | typedef struct JsonStack { | |
2826 | JsonExpect expect; | |
2827 | JsonVariant **elements; | |
8b3d4ff0 | 2828 | size_t n_elements; |
6e866b33 MB |
2829 | unsigned line_before; |
2830 | unsigned column_before; | |
3a6ce677 | 2831 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == SIZE_MAX, suppress all subsequent elements */ |
6e866b33 MB |
2832 | } JsonStack; |
2833 | ||
2834 | static void json_stack_release(JsonStack *s) { | |
2835 | assert(s); | |
2836 | ||
2837 | json_variant_unref_many(s->elements, s->n_elements); | |
2838 | s->elements = mfree(s->elements); | |
2839 | } | |
2840 | ||
2841 | static int json_parse_internal( | |
2842 | const char **input, | |
2843 | JsonSource *source, | |
46cdbd49 | 2844 | JsonParseFlags flags, |
6e866b33 MB |
2845 | JsonVariant **ret, |
2846 | unsigned *line, | |
2847 | unsigned *column, | |
2848 | bool continue_end) { | |
2849 | ||
8b3d4ff0 | 2850 | size_t n_stack = 1, i; |
6e866b33 MB |
2851 | unsigned line_buffer = 0, column_buffer = 0; |
2852 | void *tokenizer_state = NULL; | |
2853 | JsonStack *stack = NULL; | |
2854 | const char *p; | |
2855 | int r; | |
2856 | ||
2857 | assert_return(input, -EINVAL); | |
2858 | assert_return(ret, -EINVAL); | |
2859 | ||
2860 | p = *input; | |
2861 | ||
8b3d4ff0 | 2862 | if (!GREEDY_REALLOC(stack, n_stack)) |
6e866b33 MB |
2863 | return -ENOMEM; |
2864 | ||
2865 | stack[0] = (JsonStack) { | |
2866 | .expect = EXPECT_TOPLEVEL, | |
2867 | }; | |
2868 | ||
2869 | if (!line) | |
2870 | line = &line_buffer; | |
2871 | if (!column) | |
2872 | column = &column_buffer; | |
2873 | ||
2874 | for (;;) { | |
f2dec872 | 2875 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
6e866b33 MB |
2876 | _cleanup_free_ char *string = NULL; |
2877 | unsigned line_token, column_token; | |
6e866b33 MB |
2878 | JsonStack *current; |
2879 | JsonValue value; | |
2880 | int token; | |
2881 | ||
2882 | assert(n_stack > 0); | |
2883 | current = stack + n_stack - 1; | |
2884 | ||
2885 | if (continue_end && current->expect == EXPECT_END) | |
2886 | goto done; | |
2887 | ||
2888 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2889 | if (token < 0) { | |
2890 | r = token; | |
2891 | goto finish; | |
2892 | } | |
2893 | ||
2894 | switch (token) { | |
2895 | ||
2896 | case JSON_TOKEN_END: | |
2897 | if (current->expect != EXPECT_END) { | |
2898 | r = -EINVAL; | |
2899 | goto finish; | |
2900 | } | |
2901 | ||
2902 | assert(current->n_elements == 1); | |
2903 | assert(n_stack == 1); | |
2904 | goto done; | |
2905 | ||
2906 | case JSON_TOKEN_COLON: | |
2907 | ||
2908 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2909 | r = -EINVAL; | |
2910 | goto finish; | |
2911 | } | |
2912 | ||
2913 | current->expect = EXPECT_OBJECT_VALUE; | |
2914 | break; | |
2915 | ||
2916 | case JSON_TOKEN_COMMA: | |
2917 | ||
2918 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2919 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2920 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2921 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2922 | else { | |
2923 | r = -EINVAL; | |
2924 | goto finish; | |
2925 | } | |
2926 | ||
2927 | break; | |
2928 | ||
2929 | case JSON_TOKEN_OBJECT_OPEN: | |
2930 | ||
2931 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2932 | r = -EINVAL; | |
2933 | goto finish; | |
2934 | } | |
2935 | ||
8b3d4ff0 | 2936 | if (!GREEDY_REALLOC(stack, n_stack+1)) { |
6e866b33 MB |
2937 | r = -ENOMEM; |
2938 | goto finish; | |
2939 | } | |
2940 | current = stack + n_stack - 1; | |
2941 | ||
2942 | /* Prepare the expect for when we return from the child */ | |
2943 | if (current->expect == EXPECT_TOPLEVEL) | |
2944 | current->expect = EXPECT_END; | |
2945 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2946 | current->expect = EXPECT_OBJECT_COMMA; | |
2947 | else { | |
2948 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2949 | current->expect = EXPECT_ARRAY_COMMA; | |
2950 | } | |
2951 | ||
2952 | stack[n_stack++] = (JsonStack) { | |
2953 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2954 | .line_before = line_token, | |
2955 | .column_before = column_token, | |
2956 | }; | |
2957 | ||
2958 | current = stack + n_stack - 1; | |
2959 | break; | |
2960 | ||
2961 | case JSON_TOKEN_OBJECT_CLOSE: | |
2962 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2963 | r = -EINVAL; | |
2964 | goto finish; | |
2965 | } | |
2966 | ||
2967 | assert(n_stack > 1); | |
2968 | ||
2969 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2970 | if (r < 0) | |
2971 | goto finish; | |
2972 | ||
2973 | line_token = current->line_before; | |
2974 | column_token = current->column_before; | |
2975 | ||
2976 | json_stack_release(current); | |
2977 | n_stack--, current--; | |
2978 | ||
2979 | break; | |
2980 | ||
2981 | case JSON_TOKEN_ARRAY_OPEN: | |
2982 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2983 | r = -EINVAL; | |
2984 | goto finish; | |
2985 | } | |
2986 | ||
8b3d4ff0 | 2987 | if (!GREEDY_REALLOC(stack, n_stack+1)) { |
6e866b33 MB |
2988 | r = -ENOMEM; |
2989 | goto finish; | |
2990 | } | |
2991 | current = stack + n_stack - 1; | |
2992 | ||
2993 | /* Prepare the expect for when we return from the child */ | |
2994 | if (current->expect == EXPECT_TOPLEVEL) | |
2995 | current->expect = EXPECT_END; | |
2996 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2997 | current->expect = EXPECT_OBJECT_COMMA; | |
2998 | else { | |
2999 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3000 | current->expect = EXPECT_ARRAY_COMMA; | |
3001 | } | |
3002 | ||
3003 | stack[n_stack++] = (JsonStack) { | |
3004 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
3005 | .line_before = line_token, | |
3006 | .column_before = column_token, | |
3007 | }; | |
3008 | ||
3009 | break; | |
3010 | ||
3011 | case JSON_TOKEN_ARRAY_CLOSE: | |
3012 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
3013 | r = -EINVAL; | |
3014 | goto finish; | |
3015 | } | |
3016 | ||
3017 | assert(n_stack > 1); | |
3018 | ||
3019 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
3020 | if (r < 0) | |
3021 | goto finish; | |
3022 | ||
3023 | line_token = current->line_before; | |
3024 | column_token = current->column_before; | |
3025 | ||
3026 | json_stack_release(current); | |
3027 | n_stack--, current--; | |
3028 | break; | |
3029 | ||
3030 | case JSON_TOKEN_STRING: | |
3031 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3032 | r = -EINVAL; | |
3033 | goto finish; | |
3034 | } | |
3035 | ||
3036 | r = json_variant_new_string(&add, string); | |
3037 | if (r < 0) | |
3038 | goto finish; | |
3039 | ||
3040 | if (current->expect == EXPECT_TOPLEVEL) | |
3041 | current->expect = EXPECT_END; | |
3042 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
3043 | current->expect = EXPECT_OBJECT_COLON; | |
3044 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3045 | current->expect = EXPECT_OBJECT_COMMA; | |
3046 | else { | |
3047 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3048 | current->expect = EXPECT_ARRAY_COMMA; | |
3049 | } | |
3050 | ||
3051 | break; | |
3052 | ||
3053 | case JSON_TOKEN_REAL: | |
3054 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3055 | r = -EINVAL; | |
3056 | goto finish; | |
3057 | } | |
3058 | ||
3059 | r = json_variant_new_real(&add, value.real); | |
3060 | if (r < 0) | |
3061 | goto finish; | |
3062 | ||
3063 | if (current->expect == EXPECT_TOPLEVEL) | |
3064 | current->expect = EXPECT_END; | |
3065 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3066 | current->expect = EXPECT_OBJECT_COMMA; | |
3067 | else { | |
3068 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3069 | current->expect = EXPECT_ARRAY_COMMA; | |
3070 | } | |
3071 | ||
3072 | break; | |
3073 | ||
3074 | case JSON_TOKEN_INTEGER: | |
3075 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3076 | r = -EINVAL; | |
3077 | goto finish; | |
3078 | } | |
3079 | ||
3080 | r = json_variant_new_integer(&add, value.integer); | |
3081 | if (r < 0) | |
3082 | goto finish; | |
3083 | ||
3084 | if (current->expect == EXPECT_TOPLEVEL) | |
3085 | current->expect = EXPECT_END; | |
3086 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3087 | current->expect = EXPECT_OBJECT_COMMA; | |
3088 | else { | |
3089 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3090 | current->expect = EXPECT_ARRAY_COMMA; | |
3091 | } | |
3092 | ||
3093 | break; | |
3094 | ||
3095 | case JSON_TOKEN_UNSIGNED: | |
3096 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3097 | r = -EINVAL; | |
3098 | goto finish; | |
3099 | } | |
3100 | ||
3101 | r = json_variant_new_unsigned(&add, value.unsig); | |
3102 | if (r < 0) | |
3103 | goto finish; | |
3104 | ||
3105 | if (current->expect == EXPECT_TOPLEVEL) | |
3106 | current->expect = EXPECT_END; | |
3107 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3108 | current->expect = EXPECT_OBJECT_COMMA; | |
3109 | else { | |
3110 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3111 | current->expect = EXPECT_ARRAY_COMMA; | |
3112 | } | |
3113 | ||
3114 | break; | |
3115 | ||
3116 | case JSON_TOKEN_BOOLEAN: | |
3117 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3118 | r = -EINVAL; | |
3119 | goto finish; | |
3120 | } | |
3121 | ||
3122 | r = json_variant_new_boolean(&add, value.boolean); | |
3123 | if (r < 0) | |
3124 | goto finish; | |
3125 | ||
3126 | if (current->expect == EXPECT_TOPLEVEL) | |
3127 | current->expect = EXPECT_END; | |
3128 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3129 | current->expect = EXPECT_OBJECT_COMMA; | |
3130 | else { | |
3131 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3132 | current->expect = EXPECT_ARRAY_COMMA; | |
3133 | } | |
3134 | ||
3135 | break; | |
3136 | ||
3137 | case JSON_TOKEN_NULL: | |
3138 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3139 | r = -EINVAL; | |
3140 | goto finish; | |
3141 | } | |
3142 | ||
3143 | r = json_variant_new_null(&add); | |
3144 | if (r < 0) | |
3145 | goto finish; | |
3146 | ||
3147 | if (current->expect == EXPECT_TOPLEVEL) | |
3148 | current->expect = EXPECT_END; | |
3149 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3150 | current->expect = EXPECT_OBJECT_COMMA; | |
3151 | else { | |
3152 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3153 | current->expect = EXPECT_ARRAY_COMMA; | |
3154 | } | |
3155 | ||
3156 | break; | |
3157 | ||
3158 | default: | |
3159 | assert_not_reached("Unexpected token"); | |
3160 | } | |
3161 | ||
3162 | if (add) { | |
46cdbd49 BR |
3163 | /* If we are asked to make this parsed object sensitive, then let's apply this |
3164 | * immediately after allocating each variant, so that when we abort half-way | |
3165 | * everything we already allocated that is then freed is correctly marked. */ | |
3166 | if (FLAGS_SET(flags, JSON_PARSE_SENSITIVE)) | |
3167 | json_variant_sensitive(add); | |
3168 | ||
6e866b33 MB |
3169 | (void) json_variant_set_source(&add, source, line_token, column_token); |
3170 | ||
8b3d4ff0 | 3171 | if (!GREEDY_REALLOC(current->elements, current->n_elements + 1)) { |
6e866b33 MB |
3172 | r = -ENOMEM; |
3173 | goto finish; | |
3174 | } | |
3175 | ||
f2dec872 | 3176 | current->elements[current->n_elements++] = TAKE_PTR(add); |
6e866b33 MB |
3177 | } |
3178 | } | |
3179 | ||
3180 | done: | |
3181 | assert(n_stack == 1); | |
3182 | assert(stack[0].n_elements == 1); | |
3183 | ||
3184 | *ret = json_variant_ref(stack[0].elements[0]); | |
3185 | *input = p; | |
3186 | r = 0; | |
3187 | ||
3188 | finish: | |
3189 | for (i = 0; i < n_stack; i++) | |
3190 | json_stack_release(stack + i); | |
3191 | ||
3192 | free(stack); | |
3193 | ||
3194 | return r; | |
3195 | } | |
3196 | ||
46cdbd49 BR |
3197 | int json_parse(const char *input, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3198 | return json_parse_internal(&input, NULL, flags, ret, ret_line, ret_column, false); | |
6e866b33 MB |
3199 | } |
3200 | ||
46cdbd49 BR |
3201 | int json_parse_continue(const char **p, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3202 | return json_parse_internal(p, NULL, flags, ret, ret_line, ret_column, true); | |
6e866b33 MB |
3203 | } |
3204 | ||
46cdbd49 | 3205 | int json_parse_file_at(FILE *f, int dir_fd, const char *path, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
6e866b33 MB |
3206 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; |
3207 | _cleanup_free_ char *text = NULL; | |
3208 | const char *p; | |
3209 | int r; | |
3210 | ||
3211 | if (f) | |
3212 | r = read_full_stream(f, &text, NULL); | |
3213 | else if (path) | |
3a6ce677 | 3214 | r = read_full_file_full(dir_fd, path, UINT64_MAX, SIZE_MAX, 0, NULL, &text, NULL); |
6e866b33 MB |
3215 | else |
3216 | return -EINVAL; | |
3217 | if (r < 0) | |
3218 | return r; | |
3219 | ||
3220 | if (path) { | |
3221 | source = json_source_new(path); | |
3222 | if (!source) | |
3223 | return -ENOMEM; | |
3224 | } | |
3225 | ||
3226 | p = text; | |
46cdbd49 | 3227 | return json_parse_internal(&p, source, flags, ret, ret_line, ret_column, false); |
6e866b33 MB |
3228 | } |
3229 | ||
3230 | int json_buildv(JsonVariant **ret, va_list ap) { | |
3231 | JsonStack *stack = NULL; | |
8b3d4ff0 | 3232 | size_t n_stack = 1, i; |
6e866b33 MB |
3233 | int r; |
3234 | ||
3235 | assert_return(ret, -EINVAL); | |
3236 | ||
8b3d4ff0 | 3237 | if (!GREEDY_REALLOC(stack, n_stack)) |
6e866b33 MB |
3238 | return -ENOMEM; |
3239 | ||
3240 | stack[0] = (JsonStack) { | |
3241 | .expect = EXPECT_TOPLEVEL, | |
3242 | }; | |
3243 | ||
3244 | for (;;) { | |
3245 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; | |
3246 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would | |
3247 | * have been added to the current variant */ | |
3248 | JsonStack *current; | |
3249 | int command; | |
3250 | ||
3251 | assert(n_stack > 0); | |
3252 | current = stack + n_stack - 1; | |
3253 | ||
3254 | if (current->expect == EXPECT_END) | |
3255 | goto done; | |
3256 | ||
3257 | command = va_arg(ap, int); | |
3258 | ||
3259 | switch (command) { | |
3260 | ||
3261 | case _JSON_BUILD_STRING: { | |
3262 | const char *p; | |
3263 | ||
3264 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3265 | r = -EINVAL; | |
3266 | goto finish; | |
3267 | } | |
3268 | ||
3269 | p = va_arg(ap, const char *); | |
3270 | ||
3271 | if (current->n_suppress == 0) { | |
3272 | r = json_variant_new_string(&add, p); | |
3273 | if (r < 0) | |
3274 | goto finish; | |
3275 | } | |
3276 | ||
3277 | n_subtract = 1; | |
3278 | ||
3279 | if (current->expect == EXPECT_TOPLEVEL) | |
3280 | current->expect = EXPECT_END; | |
3281 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3282 | current->expect = EXPECT_OBJECT_KEY; | |
3283 | else | |
3284 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3285 | ||
3286 | break; | |
3287 | } | |
3288 | ||
3289 | case _JSON_BUILD_INTEGER: { | |
3290 | intmax_t j; | |
3291 | ||
3292 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3293 | r = -EINVAL; | |
3294 | goto finish; | |
3295 | } | |
3296 | ||
3297 | j = va_arg(ap, intmax_t); | |
3298 | ||
3299 | if (current->n_suppress == 0) { | |
3300 | r = json_variant_new_integer(&add, j); | |
3301 | if (r < 0) | |
3302 | goto finish; | |
3303 | } | |
3304 | ||
3305 | n_subtract = 1; | |
3306 | ||
3307 | if (current->expect == EXPECT_TOPLEVEL) | |
3308 | current->expect = EXPECT_END; | |
3309 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3310 | current->expect = EXPECT_OBJECT_KEY; | |
3311 | else | |
3312 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3313 | ||
3314 | break; | |
3315 | } | |
3316 | ||
3317 | case _JSON_BUILD_UNSIGNED: { | |
3318 | uintmax_t j; | |
3319 | ||
3320 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3321 | r = -EINVAL; | |
3322 | goto finish; | |
3323 | } | |
3324 | ||
3325 | j = va_arg(ap, uintmax_t); | |
3326 | ||
3327 | if (current->n_suppress == 0) { | |
3328 | r = json_variant_new_unsigned(&add, j); | |
3329 | if (r < 0) | |
3330 | goto finish; | |
3331 | } | |
3332 | ||
3333 | n_subtract = 1; | |
3334 | ||
3335 | if (current->expect == EXPECT_TOPLEVEL) | |
3336 | current->expect = EXPECT_END; | |
3337 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3338 | current->expect = EXPECT_OBJECT_KEY; | |
3339 | else | |
3340 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3341 | ||
3342 | break; | |
3343 | } | |
3344 | ||
3345 | case _JSON_BUILD_REAL: { | |
3346 | long double d; | |
3347 | ||
3348 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3349 | r = -EINVAL; | |
3350 | goto finish; | |
3351 | } | |
3352 | ||
3353 | d = va_arg(ap, long double); | |
3354 | ||
3355 | if (current->n_suppress == 0) { | |
3356 | r = json_variant_new_real(&add, d); | |
3357 | if (r < 0) | |
3358 | goto finish; | |
3359 | } | |
3360 | ||
3361 | n_subtract = 1; | |
3362 | ||
3363 | if (current->expect == EXPECT_TOPLEVEL) | |
3364 | current->expect = EXPECT_END; | |
3365 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3366 | current->expect = EXPECT_OBJECT_KEY; | |
3367 | else | |
3368 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3369 | ||
3370 | break; | |
3371 | } | |
3372 | ||
3373 | case _JSON_BUILD_BOOLEAN: { | |
3374 | bool b; | |
3375 | ||
3376 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3377 | r = -EINVAL; | |
3378 | goto finish; | |
3379 | } | |
3380 | ||
3381 | b = va_arg(ap, int); | |
3382 | ||
3383 | if (current->n_suppress == 0) { | |
3384 | r = json_variant_new_boolean(&add, b); | |
3385 | if (r < 0) | |
3386 | goto finish; | |
3387 | } | |
3388 | ||
3389 | n_subtract = 1; | |
3390 | ||
3391 | if (current->expect == EXPECT_TOPLEVEL) | |
3392 | current->expect = EXPECT_END; | |
3393 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3394 | current->expect = EXPECT_OBJECT_KEY; | |
3395 | else | |
3396 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3397 | ||
3398 | break; | |
3399 | } | |
3400 | ||
3401 | case _JSON_BUILD_NULL: | |
3402 | ||
3403 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3404 | r = -EINVAL; | |
3405 | goto finish; | |
3406 | } | |
3407 | ||
3408 | if (current->n_suppress == 0) { | |
3409 | r = json_variant_new_null(&add); | |
3410 | if (r < 0) | |
3411 | goto finish; | |
3412 | } | |
3413 | ||
3414 | n_subtract = 1; | |
3415 | ||
3416 | if (current->expect == EXPECT_TOPLEVEL) | |
3417 | current->expect = EXPECT_END; | |
3418 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3419 | current->expect = EXPECT_OBJECT_KEY; | |
3420 | else | |
3421 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3422 | ||
3423 | break; | |
3424 | ||
3425 | case _JSON_BUILD_VARIANT: | |
3426 | ||
3427 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3428 | r = -EINVAL; | |
3429 | goto finish; | |
3430 | } | |
3431 | ||
3432 | /* Note that we don't care for current->n_suppress here, after all the variant is already | |
3433 | * allocated anyway... */ | |
3434 | add = va_arg(ap, JsonVariant*); | |
3435 | if (!add) | |
3436 | add = JSON_VARIANT_MAGIC_NULL; | |
3437 | else | |
3438 | json_variant_ref(add); | |
3439 | ||
3440 | n_subtract = 1; | |
3441 | ||
3442 | if (current->expect == EXPECT_TOPLEVEL) | |
3443 | current->expect = EXPECT_END; | |
3444 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3445 | current->expect = EXPECT_OBJECT_KEY; | |
3446 | else | |
3447 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3448 | ||
3449 | break; | |
3450 | ||
46cdbd49 BR |
3451 | case _JSON_BUILD_VARIANT_ARRAY: { |
3452 | JsonVariant **array; | |
3453 | size_t n; | |
3454 | ||
3455 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3456 | r = -EINVAL; | |
3457 | goto finish; | |
3458 | } | |
3459 | ||
3460 | array = va_arg(ap, JsonVariant**); | |
3461 | n = va_arg(ap, size_t); | |
3462 | ||
3463 | if (current->n_suppress == 0) { | |
3464 | r = json_variant_new_array(&add, array, n); | |
3465 | if (r < 0) | |
3466 | goto finish; | |
3467 | } | |
3468 | ||
3469 | n_subtract = 1; | |
3470 | ||
3471 | if (current->expect == EXPECT_TOPLEVEL) | |
3472 | current->expect = EXPECT_END; | |
3473 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3474 | current->expect = EXPECT_OBJECT_KEY; | |
3475 | else | |
3476 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3477 | ||
3478 | break; | |
3479 | } | |
3480 | ||
6e866b33 MB |
3481 | case _JSON_BUILD_LITERAL: { |
3482 | const char *l; | |
3483 | ||
3484 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3485 | r = -EINVAL; | |
3486 | goto finish; | |
3487 | } | |
3488 | ||
3489 | l = va_arg(ap, const char *); | |
3490 | ||
3491 | if (l) { | |
3492 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
3493 | * errors even in suppressed object properties */ | |
3494 | ||
46cdbd49 | 3495 | r = json_parse(l, 0, &add, NULL, NULL); |
6e866b33 MB |
3496 | if (r < 0) |
3497 | goto finish; | |
3498 | } else | |
3499 | add = JSON_VARIANT_MAGIC_NULL; | |
3500 | ||
3501 | n_subtract = 1; | |
3502 | ||
3503 | if (current->expect == EXPECT_TOPLEVEL) | |
3504 | current->expect = EXPECT_END; | |
3505 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3506 | current->expect = EXPECT_OBJECT_KEY; | |
3507 | else | |
3508 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3509 | ||
3510 | break; | |
3511 | } | |
3512 | ||
3513 | case _JSON_BUILD_ARRAY_BEGIN: | |
3514 | ||
3515 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3516 | r = -EINVAL; | |
3517 | goto finish; | |
3518 | } | |
3519 | ||
8b3d4ff0 | 3520 | if (!GREEDY_REALLOC(stack, n_stack+1)) { |
6e866b33 MB |
3521 | r = -ENOMEM; |
3522 | goto finish; | |
3523 | } | |
3524 | current = stack + n_stack - 1; | |
3525 | ||
3526 | if (current->expect == EXPECT_TOPLEVEL) | |
3527 | current->expect = EXPECT_END; | |
3528 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3529 | current->expect = EXPECT_OBJECT_KEY; | |
3530 | else | |
3531 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3532 | ||
3533 | stack[n_stack++] = (JsonStack) { | |
3534 | .expect = EXPECT_ARRAY_ELEMENT, | |
3a6ce677 | 3535 | .n_suppress = current->n_suppress != 0 ? SIZE_MAX : 0, /* if we shall suppress the |
6e866b33 MB |
3536 | * new array, then we should |
3537 | * also suppress all array | |
3538 | * members */ | |
3539 | }; | |
3540 | ||
3541 | break; | |
3542 | ||
3543 | case _JSON_BUILD_ARRAY_END: | |
3544 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
3545 | r = -EINVAL; | |
3546 | goto finish; | |
3547 | } | |
3548 | ||
3549 | assert(n_stack > 1); | |
3550 | ||
3551 | if (current->n_suppress == 0) { | |
3552 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
3553 | if (r < 0) | |
3554 | goto finish; | |
3555 | } | |
3556 | ||
3557 | n_subtract = 1; | |
3558 | ||
3559 | json_stack_release(current); | |
3560 | n_stack--, current--; | |
3561 | ||
3562 | break; | |
3563 | ||
3564 | case _JSON_BUILD_STRV: { | |
3565 | char **l; | |
3566 | ||
3567 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3568 | r = -EINVAL; | |
3569 | goto finish; | |
3570 | } | |
3571 | ||
3572 | l = va_arg(ap, char **); | |
3573 | ||
3574 | if (current->n_suppress == 0) { | |
3575 | r = json_variant_new_array_strv(&add, l); | |
3576 | if (r < 0) | |
3577 | goto finish; | |
3578 | } | |
3579 | ||
3580 | n_subtract = 1; | |
3581 | ||
3582 | if (current->expect == EXPECT_TOPLEVEL) | |
3583 | current->expect = EXPECT_END; | |
3584 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3585 | current->expect = EXPECT_OBJECT_KEY; | |
3586 | else | |
3587 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3588 | ||
3589 | break; | |
3590 | } | |
3591 | ||
46cdbd49 BR |
3592 | case _JSON_BUILD_BASE64: { |
3593 | const void *p; | |
3594 | size_t n; | |
3595 | ||
3596 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3597 | r = -EINVAL; | |
3598 | goto finish; | |
3599 | } | |
3600 | ||
3601 | p = va_arg(ap, const void *); | |
3602 | n = va_arg(ap, size_t); | |
3603 | ||
3604 | if (current->n_suppress == 0) { | |
3605 | r = json_variant_new_base64(&add, p, n); | |
3606 | if (r < 0) | |
3607 | goto finish; | |
3608 | } | |
3609 | ||
3610 | n_subtract = 1; | |
3611 | ||
3612 | if (current->expect == EXPECT_TOPLEVEL) | |
3613 | current->expect = EXPECT_END; | |
3614 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3615 | current->expect = EXPECT_OBJECT_KEY; | |
3616 | else | |
3617 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3618 | ||
3619 | break; | |
3620 | } | |
3621 | ||
3a6ce677 BR |
3622 | case _JSON_BUILD_HEX: { |
3623 | const void *p; | |
3624 | size_t n; | |
3625 | ||
3626 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3627 | r = -EINVAL; | |
3628 | goto finish; | |
3629 | } | |
3630 | ||
3631 | p = va_arg(ap, const void *); | |
3632 | n = va_arg(ap, size_t); | |
3633 | ||
3634 | if (current->n_suppress == 0) { | |
3635 | r = json_variant_new_hex(&add, p, n); | |
3636 | if (r < 0) | |
3637 | goto finish; | |
3638 | } | |
3639 | ||
3640 | n_subtract = 1; | |
3641 | ||
3642 | if (current->expect == EXPECT_TOPLEVEL) | |
3643 | current->expect = EXPECT_END; | |
3644 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3645 | current->expect = EXPECT_OBJECT_KEY; | |
3646 | else | |
3647 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3648 | ||
3649 | break; | |
3650 | } | |
3651 | ||
a032b68d MB |
3652 | case _JSON_BUILD_ID128: { |
3653 | sd_id128_t id; | |
3654 | ||
3655 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3656 | r = -EINVAL; | |
3657 | goto finish; | |
3658 | } | |
3659 | ||
3660 | id = va_arg(ap, sd_id128_t); | |
3661 | ||
3662 | if (current->n_suppress == 0) { | |
3663 | r = json_variant_new_id128(&add, id); | |
3664 | if (r < 0) | |
3665 | goto finish; | |
3666 | } | |
3667 | ||
3668 | n_subtract = 1; | |
3669 | ||
3670 | if (current->expect == EXPECT_TOPLEVEL) | |
3671 | current->expect = EXPECT_END; | |
3672 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3673 | current->expect = EXPECT_OBJECT_KEY; | |
3674 | else | |
3675 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3676 | ||
3677 | break; | |
3678 | } | |
3679 | ||
3680 | case _JSON_BUILD_BYTE_ARRAY: { | |
3681 | const void *array; | |
3682 | size_t n; | |
3683 | ||
3684 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3685 | r = -EINVAL; | |
3686 | goto finish; | |
3687 | } | |
3688 | ||
3689 | array = va_arg(ap, const void*); | |
3690 | n = va_arg(ap, size_t); | |
3691 | ||
3692 | if (current->n_suppress == 0) { | |
3693 | r = json_variant_new_array_bytes(&add, array, n); | |
3694 | if (r < 0) | |
3695 | goto finish; | |
3696 | } | |
3697 | ||
3698 | n_subtract = 1; | |
3699 | ||
3700 | if (current->expect == EXPECT_TOPLEVEL) | |
3701 | current->expect = EXPECT_END; | |
3702 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3703 | current->expect = EXPECT_OBJECT_KEY; | |
3704 | else | |
3705 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3706 | ||
3707 | break; | |
3708 | } | |
3709 | ||
6e866b33 MB |
3710 | case _JSON_BUILD_OBJECT_BEGIN: |
3711 | ||
3712 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3713 | r = -EINVAL; | |
3714 | goto finish; | |
3715 | } | |
3716 | ||
8b3d4ff0 | 3717 | if (!GREEDY_REALLOC(stack, n_stack+1)) { |
6e866b33 MB |
3718 | r = -ENOMEM; |
3719 | goto finish; | |
3720 | } | |
3721 | current = stack + n_stack - 1; | |
3722 | ||
3723 | if (current->expect == EXPECT_TOPLEVEL) | |
3724 | current->expect = EXPECT_END; | |
3725 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3726 | current->expect = EXPECT_OBJECT_KEY; | |
3727 | else | |
3728 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3729 | ||
3730 | stack[n_stack++] = (JsonStack) { | |
3731 | .expect = EXPECT_OBJECT_KEY, | |
3a6ce677 | 3732 | .n_suppress = current->n_suppress != 0 ? SIZE_MAX : 0, /* if we shall suppress the |
6e866b33 MB |
3733 | * new object, then we should |
3734 | * also suppress all object | |
3735 | * members */ | |
3736 | }; | |
3737 | ||
3738 | break; | |
3739 | ||
3740 | case _JSON_BUILD_OBJECT_END: | |
3741 | ||
3742 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3743 | r = -EINVAL; | |
3744 | goto finish; | |
3745 | } | |
3746 | ||
3747 | assert(n_stack > 1); | |
3748 | ||
3749 | if (current->n_suppress == 0) { | |
3750 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3751 | if (r < 0) | |
3752 | goto finish; | |
3753 | } | |
3754 | ||
3755 | n_subtract = 1; | |
3756 | ||
3757 | json_stack_release(current); | |
3758 | n_stack--, current--; | |
3759 | ||
3760 | break; | |
3761 | ||
3762 | case _JSON_BUILD_PAIR: { | |
3763 | const char *n; | |
3764 | ||
3765 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3766 | r = -EINVAL; | |
3767 | goto finish; | |
3768 | } | |
3769 | ||
3770 | n = va_arg(ap, const char *); | |
3771 | ||
3772 | if (current->n_suppress == 0) { | |
3773 | r = json_variant_new_string(&add, n); | |
3774 | if (r < 0) | |
3775 | goto finish; | |
3776 | } | |
3777 | ||
3778 | n_subtract = 1; | |
3779 | ||
3780 | current->expect = EXPECT_OBJECT_VALUE; | |
3781 | break; | |
3782 | } | |
3783 | ||
3784 | case _JSON_BUILD_PAIR_CONDITION: { | |
3785 | const char *n; | |
3786 | bool b; | |
3787 | ||
3788 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3789 | r = -EINVAL; | |
3790 | goto finish; | |
3791 | } | |
3792 | ||
3793 | b = va_arg(ap, int); | |
3794 | n = va_arg(ap, const char *); | |
3795 | ||
3796 | if (b && current->n_suppress == 0) { | |
3797 | r = json_variant_new_string(&add, n); | |
3798 | if (r < 0) | |
3799 | goto finish; | |
3800 | } | |
3801 | ||
3802 | n_subtract = 1; /* we generated one item */ | |
3803 | ||
3a6ce677 | 3804 | if (!b && current->n_suppress != SIZE_MAX) |
6e866b33 MB |
3805 | current->n_suppress += 2; /* Suppress this one and the next item */ |
3806 | ||
3807 | current->expect = EXPECT_OBJECT_VALUE; | |
3808 | break; | |
3809 | }} | |
3810 | ||
3811 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ | |
3812 | if (add && current->n_suppress == 0) { | |
8b3d4ff0 | 3813 | if (!GREEDY_REALLOC(current->elements, current->n_elements + 1)) { |
6e866b33 MB |
3814 | r = -ENOMEM; |
3815 | goto finish; | |
3816 | } | |
3817 | ||
3818 | current->elements[current->n_elements++] = TAKE_PTR(add); | |
3819 | } | |
3820 | ||
3821 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3a6ce677 | 3822 | * counter. Except if the counter is SIZE_MAX, i.e. we shall suppress an infinite number of elements |
6e866b33 | 3823 | * on this stack level */ |
3a6ce677 | 3824 | if (current->n_suppress != SIZE_MAX) { |
6e866b33 MB |
3825 | if (current->n_suppress <= n_subtract) /* Saturated */ |
3826 | current->n_suppress = 0; | |
3827 | else | |
3828 | current->n_suppress -= n_subtract; | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | done: | |
3833 | assert(n_stack == 1); | |
3834 | assert(stack[0].n_elements == 1); | |
3835 | ||
3836 | *ret = json_variant_ref(stack[0].elements[0]); | |
3837 | r = 0; | |
3838 | ||
3839 | finish: | |
3840 | for (i = 0; i < n_stack; i++) | |
3841 | json_stack_release(stack + i); | |
3842 | ||
3843 | free(stack); | |
3844 | ||
6e866b33 MB |
3845 | return r; |
3846 | } | |
3847 | ||
3848 | int json_build(JsonVariant **ret, ...) { | |
3849 | va_list ap; | |
3850 | int r; | |
3851 | ||
3852 | va_start(ap, ret); | |
3853 | r = json_buildv(ret, ap); | |
3854 | va_end(ap); | |
3855 | ||
3856 | return r; | |
3857 | } | |
3858 | ||
3859 | int json_log_internal( | |
3860 | JsonVariant *variant, | |
3861 | int level, | |
3862 | int error, | |
3863 | const char *file, | |
3864 | int line, | |
3865 | const char *func, | |
3866 | const char *format, ...) { | |
3867 | ||
3868 | PROTECT_ERRNO; | |
3869 | ||
3870 | unsigned source_line, source_column; | |
3871 | char buffer[LINE_MAX]; | |
3872 | const char *source; | |
3873 | va_list ap; | |
3874 | int r; | |
3875 | ||
7c20daf6 | 3876 | errno = ERRNO_VALUE(error); |
6e866b33 MB |
3877 | |
3878 | va_start(ap, format); | |
3879 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3880 | va_end(ap); | |
3881 | ||
3882 | if (variant) { | |
3883 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3884 | if (r < 0) | |
3885 | return r; | |
3886 | } else { | |
3887 | source = NULL; | |
3888 | source_line = 0; | |
3889 | source_column = 0; | |
3890 | } | |
3891 | ||
3892 | if (source && source_line > 0 && source_column > 0) | |
3893 | return log_struct_internal( | |
3a6ce677 | 3894 | level, |
6e866b33 MB |
3895 | error, |
3896 | file, line, func, | |
3897 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3898 | "CONFIG_FILE=%s", source, | |
3899 | "CONFIG_LINE=%u", source_line, | |
3900 | "CONFIG_COLUMN=%u", source_column, | |
bb4f798a | 3901 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
6e866b33 | 3902 | NULL); |
3a6ce677 BR |
3903 | else if (source_line > 0 && source_column > 0) |
3904 | return log_struct_internal( | |
3905 | level, | |
3906 | error, | |
3907 | file, line, func, | |
3908 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3909 | "CONFIG_LINE=%u", source_line, | |
3910 | "CONFIG_COLUMN=%u", source_column, | |
3911 | LOG_MESSAGE("(string):%u:%u: %s", source_line, source_column, buffer), | |
3912 | NULL); | |
6e866b33 MB |
3913 | else |
3914 | return log_struct_internal( | |
3a6ce677 | 3915 | level, |
6e866b33 MB |
3916 | error, |
3917 | file, line, func, | |
3918 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3919 | LOG_MESSAGE("%s", buffer), | |
3920 | NULL); | |
3921 | } | |
3922 | ||
3923 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3924 | const JsonDispatch *p; | |
3925 | size_t i, n, m; | |
3926 | int r, done = 0; | |
3927 | bool *found; | |
3928 | ||
3929 | if (!json_variant_is_object(v)) { | |
3930 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3931 | ||
3932 | if (flags & JSON_PERMISSIVE) | |
3933 | return 0; | |
3934 | ||
3935 | return -EINVAL; | |
3936 | } | |
3937 | ||
3938 | for (p = table, m = 0; p->name; p++) | |
3939 | m++; | |
3940 | ||
3941 | found = newa0(bool, m); | |
3942 | ||
3943 | n = json_variant_elements(v); | |
3944 | for (i = 0; i < n; i += 2) { | |
3945 | JsonVariant *key, *value; | |
3946 | ||
3947 | assert_se(key = json_variant_by_index(v, i)); | |
3948 | assert_se(value = json_variant_by_index(v, i+1)); | |
3949 | ||
3950 | for (p = table; p->name; p++) | |
a032b68d | 3951 | if (p->name == POINTER_MAX || |
6e866b33 MB |
3952 | streq_ptr(json_variant_string(key), p->name)) |
3953 | break; | |
3954 | ||
3955 | if (p->name) { /* Found a matching entry! :-) */ | |
3956 | JsonDispatchFlags merged_flags; | |
3957 | ||
3958 | merged_flags = flags | p->flags; | |
3959 | ||
3960 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3961 | !json_variant_has_type(value, p->type)) { | |
3962 | ||
3963 | json_log(value, merged_flags, 0, | |
3964 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3965 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3966 | ||
3967 | if (merged_flags & JSON_PERMISSIVE) | |
3968 | continue; | |
3969 | ||
3970 | return -EINVAL; | |
3971 | } | |
3972 | ||
3973 | if (found[p-table]) { | |
3974 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3975 | ||
3976 | if (merged_flags & JSON_PERMISSIVE) | |
3977 | continue; | |
3978 | ||
3979 | return -ENOTUNIQ; | |
3980 | } | |
3981 | ||
3982 | found[p-table] = true; | |
3983 | ||
3984 | if (p->callback) { | |
3985 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3986 | if (r < 0) { | |
3987 | if (merged_flags & JSON_PERMISSIVE) | |
3988 | continue; | |
3989 | ||
3990 | return r; | |
3991 | } | |
3992 | } | |
3993 | ||
3994 | done ++; | |
3995 | ||
3996 | } else { /* Didn't find a matching entry! :-( */ | |
3997 | ||
3998 | if (bad) { | |
3999 | r = bad(json_variant_string(key), value, flags, userdata); | |
4000 | if (r < 0) { | |
4001 | if (flags & JSON_PERMISSIVE) | |
4002 | continue; | |
4003 | ||
4004 | return r; | |
4005 | } else | |
4006 | done ++; | |
4007 | ||
4008 | } else { | |
4009 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
4010 | ||
4011 | if (flags & JSON_PERMISSIVE) | |
4012 | continue; | |
4013 | ||
4014 | return -EADDRNOTAVAIL; | |
4015 | } | |
4016 | } | |
4017 | } | |
4018 | ||
4019 | for (p = table; p->name; p++) { | |
4020 | JsonDispatchFlags merged_flags = p->flags | flags; | |
4021 | ||
4022 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
4023 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
4024 | ||
4025 | if ((merged_flags & JSON_PERMISSIVE)) | |
4026 | continue; | |
4027 | ||
4028 | return -ENXIO; | |
4029 | } | |
4030 | } | |
4031 | ||
4032 | return done; | |
4033 | } | |
4034 | ||
4035 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4036 | bool *b = userdata; | |
4037 | ||
4038 | assert(variant); | |
4039 | assert(b); | |
4040 | ||
bb4f798a MB |
4041 | if (!json_variant_is_boolean(variant)) |
4042 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
6e866b33 MB |
4043 | |
4044 | *b = json_variant_boolean(variant); | |
4045 | return 0; | |
4046 | } | |
4047 | ||
4048 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4049 | int *b = userdata; | |
4050 | ||
4051 | assert(variant); | |
4052 | assert(b); | |
4053 | ||
46cdbd49 BR |
4054 | if (json_variant_is_null(variant)) { |
4055 | *b = -1; | |
4056 | return 0; | |
4057 | } | |
4058 | ||
bb4f798a MB |
4059 | if (!json_variant_is_boolean(variant)) |
4060 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
6e866b33 MB |
4061 | |
4062 | *b = json_variant_boolean(variant); | |
4063 | return 0; | |
4064 | } | |
4065 | ||
3a6ce677 | 4066 | int json_dispatch_intmax(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
6e866b33 MB |
4067 | intmax_t *i = userdata; |
4068 | ||
4069 | assert(variant); | |
4070 | assert(i); | |
4071 | ||
bb4f798a MB |
4072 | if (!json_variant_is_integer(variant)) |
4073 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
6e866b33 MB |
4074 | |
4075 | *i = json_variant_integer(variant); | |
4076 | return 0; | |
4077 | } | |
4078 | ||
3a6ce677 | 4079 | int json_dispatch_uintmax(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
6e866b33 MB |
4080 | uintmax_t *u = userdata; |
4081 | ||
4082 | assert(variant); | |
4083 | assert(u); | |
4084 | ||
bb4f798a MB |
4085 | if (!json_variant_is_unsigned(variant)) |
4086 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
6e866b33 MB |
4087 | |
4088 | *u = json_variant_unsigned(variant); | |
4089 | return 0; | |
4090 | } | |
4091 | ||
4092 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4093 | uint32_t *u = userdata; | |
4094 | ||
4095 | assert(variant); | |
4096 | assert(u); | |
4097 | ||
bb4f798a MB |
4098 | if (!json_variant_is_unsigned(variant)) |
4099 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
6e866b33 | 4100 | |
bb4f798a MB |
4101 | if (json_variant_unsigned(variant) > UINT32_MAX) |
4102 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
6e866b33 MB |
4103 | |
4104 | *u = (uint32_t) json_variant_unsigned(variant); | |
4105 | return 0; | |
4106 | } | |
4107 | ||
4108 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4109 | int32_t *i = userdata; | |
4110 | ||
4111 | assert(variant); | |
4112 | assert(i); | |
4113 | ||
bb4f798a MB |
4114 | if (!json_variant_is_integer(variant)) |
4115 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
6e866b33 | 4116 | |
bb4f798a MB |
4117 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) |
4118 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
6e866b33 MB |
4119 | |
4120 | *i = (int32_t) json_variant_integer(variant); | |
4121 | return 0; | |
4122 | } | |
4123 | ||
4124 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4125 | char **s = userdata; | |
4126 | int r; | |
4127 | ||
4128 | assert(variant); | |
4129 | assert(s); | |
4130 | ||
4131 | if (json_variant_is_null(variant)) { | |
4132 | *s = mfree(*s); | |
4133 | return 0; | |
4134 | } | |
4135 | ||
bb4f798a MB |
4136 | if (!json_variant_is_string(variant)) |
4137 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
6e866b33 | 4138 | |
46cdbd49 BR |
4139 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) |
4140 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4141 | ||
6e866b33 MB |
4142 | r = free_and_strdup(s, json_variant_string(variant)); |
4143 | if (r < 0) | |
4144 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4145 | ||
4146 | return 0; | |
4147 | } | |
4148 | ||
46cdbd49 BR |
4149 | int json_dispatch_const_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4150 | const char **s = userdata; | |
4151 | ||
4152 | assert(variant); | |
4153 | assert(s); | |
4154 | ||
4155 | if (json_variant_is_null(variant)) { | |
4156 | *s = NULL; | |
4157 | return 0; | |
4158 | } | |
4159 | ||
4160 | if (!json_variant_is_string(variant)) | |
4161 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4162 | ||
4163 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) | |
4164 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4165 | ||
4166 | *s = json_variant_string(variant); | |
4167 | return 0; | |
4168 | } | |
4169 | ||
6e866b33 MB |
4170 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4171 | _cleanup_strv_free_ char **l = NULL; | |
4172 | char ***s = userdata; | |
f2dec872 | 4173 | JsonVariant *e; |
6e866b33 MB |
4174 | int r; |
4175 | ||
4176 | assert(variant); | |
4177 | assert(s); | |
4178 | ||
4179 | if (json_variant_is_null(variant)) { | |
4180 | *s = strv_free(*s); | |
4181 | return 0; | |
4182 | } | |
4183 | ||
46cdbd49 BR |
4184 | /* Let's be flexible here: accept a single string in place of a single-item array */ |
4185 | if (json_variant_is_string(variant)) { | |
4186 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) | |
4187 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4188 | ||
4189 | l = strv_new(json_variant_string(variant)); | |
4190 | if (!l) | |
4191 | return log_oom(); | |
4192 | ||
4193 | strv_free_and_replace(*s, l); | |
4194 | return 0; | |
4195 | } | |
4196 | ||
bb4f798a MB |
4197 | if (!json_variant_is_array(variant)) |
4198 | return json_log(variant, SYNTHETIC_ERRNO(EINVAL), flags, "JSON field '%s' is not an array.", strna(name)); | |
6e866b33 | 4199 | |
f2dec872 | 4200 | JSON_VARIANT_ARRAY_FOREACH(e, variant) { |
bb4f798a MB |
4201 | if (!json_variant_is_string(e)) |
4202 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); | |
6e866b33 | 4203 | |
46cdbd49 BR |
4204 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(e))) |
4205 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4206 | ||
6e866b33 MB |
4207 | r = strv_extend(&l, json_variant_string(e)); |
4208 | if (r < 0) | |
f2dec872 | 4209 | return json_log(e, flags, r, "Failed to append array element: %m"); |
6e866b33 MB |
4210 | } |
4211 | ||
4212 | strv_free_and_replace(*s, l); | |
4213 | return 0; | |
4214 | } | |
4215 | ||
4216 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4217 | JsonVariant **p = userdata; | |
4218 | ||
4219 | assert(variant); | |
4220 | assert(p); | |
4221 | ||
4222 | json_variant_unref(*p); | |
4223 | *p = json_variant_ref(variant); | |
4224 | ||
4225 | return 0; | |
4226 | } | |
4227 | ||
46cdbd49 BR |
4228 | int json_dispatch_uid_gid(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4229 | uid_t *uid = userdata; | |
4230 | uintmax_t k; | |
4231 | ||
4232 | assert_cc(sizeof(uid_t) == sizeof(uint32_t)); | |
4233 | assert_cc(sizeof(gid_t) == sizeof(uint32_t)); | |
4234 | ||
a10f5d05 | 4235 | DISABLE_WARNING_TYPE_LIMITS; |
3a6ce677 | 4236 | assert_cc((UID_INVALID < (uid_t) 0) == (GID_INVALID < (gid_t) 0)); |
a10f5d05 | 4237 | REENABLE_WARNING; |
46cdbd49 BR |
4238 | |
4239 | if (json_variant_is_null(variant)) { | |
4240 | *uid = UID_INVALID; | |
4241 | return 0; | |
4242 | } | |
4243 | ||
4244 | if (!json_variant_is_unsigned(variant)) | |
4245 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a integer.", strna(name)); | |
4246 | ||
4247 | k = json_variant_unsigned(variant); | |
4248 | if (k > UINT32_MAX || !uid_is_valid(k)) | |
4249 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid UID/GID.", strna(name)); | |
4250 | ||
4251 | *uid = k; | |
4252 | return 0; | |
4253 | } | |
4254 | ||
4255 | int json_dispatch_user_group_name(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4256 | char **s = userdata; | |
4257 | const char *n; | |
4258 | int r; | |
4259 | ||
4260 | if (json_variant_is_null(variant)) { | |
4261 | *s = mfree(*s); | |
4262 | return 0; | |
4263 | } | |
4264 | ||
4265 | if (!json_variant_is_string(variant)) | |
4266 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4267 | ||
4268 | n = json_variant_string(variant); | |
d0648cfe | 4269 | if (!valid_user_group_name(n, FLAGS_SET(flags, JSON_RELAX) ? VALID_USER_RELAX : 0)) |
46cdbd49 BR |
4270 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid user/group name.", strna(name)); |
4271 | ||
4272 | r = free_and_strdup(s, n); | |
4273 | if (r < 0) | |
4274 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4275 | ||
4276 | return 0; | |
4277 | } | |
4278 | ||
4279 | int json_dispatch_id128(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4280 | sd_id128_t *uuid = userdata; | |
4281 | int r; | |
4282 | ||
4283 | if (json_variant_is_null(variant)) { | |
4284 | *uuid = SD_ID128_NULL; | |
4285 | return 0; | |
4286 | } | |
4287 | ||
4288 | if (!json_variant_is_string(variant)) | |
4289 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4290 | ||
4291 | r = sd_id128_from_string(json_variant_string(variant), uuid); | |
4292 | if (r < 0) | |
4293 | return json_log(variant, flags, r, "JSON field '%s' is not a valid UID.", strna(name)); | |
4294 | ||
4295 | return 0; | |
4296 | } | |
4297 | ||
4298 | int json_dispatch_unsupported(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4299 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not allowed in this object.", strna(name)); | |
4300 | } | |
4301 | ||
4302 | static int json_cmp_strings(const void *x, const void *y) { | |
4303 | JsonVariant *const *a = x, *const *b = y; | |
4304 | ||
4305 | if (!json_variant_is_string(*a) || !json_variant_is_string(*b)) | |
4306 | return CMP(*a, *b); | |
4307 | ||
4308 | return strcmp(json_variant_string(*a), json_variant_string(*b)); | |
4309 | } | |
4310 | ||
4311 | int json_variant_sort(JsonVariant **v) { | |
4312 | _cleanup_free_ JsonVariant **a = NULL; | |
4313 | JsonVariant *n = NULL; | |
4314 | size_t i, m; | |
4315 | int r; | |
4316 | ||
4317 | assert(v); | |
4318 | ||
4319 | if (json_variant_is_sorted(*v)) | |
4320 | return 0; | |
4321 | ||
4322 | if (!json_variant_is_object(*v)) | |
4323 | return -EMEDIUMTYPE; | |
4324 | ||
4325 | /* Sorts they key/value pairs in an object variant */ | |
4326 | ||
4327 | m = json_variant_elements(*v); | |
4328 | a = new(JsonVariant*, m); | |
4329 | if (!a) | |
4330 | return -ENOMEM; | |
4331 | ||
4332 | for (i = 0; i < m; i++) | |
4333 | a[i] = json_variant_by_index(*v, i); | |
4334 | ||
4335 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4336 | ||
4337 | r = json_variant_new_object(&n, a, m); | |
4338 | if (r < 0) | |
4339 | return r; | |
a10f5d05 MB |
4340 | |
4341 | json_variant_propagate_sensitive(*v, n); | |
4342 | ||
46cdbd49 BR |
4343 | if (!n->sorted) /* Check if this worked. This will fail if there are multiple identical keys used. */ |
4344 | return -ENOTUNIQ; | |
4345 | ||
4346 | json_variant_unref(*v); | |
4347 | *v = n; | |
4348 | ||
4349 | return 1; | |
4350 | } | |
4351 | ||
4352 | int json_variant_normalize(JsonVariant **v) { | |
4353 | _cleanup_free_ JsonVariant **a = NULL; | |
4354 | JsonVariant *n = NULL; | |
4355 | size_t i, j, m; | |
4356 | int r; | |
4357 | ||
4358 | assert(v); | |
4359 | ||
4360 | if (json_variant_is_normalized(*v)) | |
4361 | return 0; | |
4362 | ||
4363 | if (!json_variant_is_object(*v) && !json_variant_is_array(*v)) | |
4364 | return -EMEDIUMTYPE; | |
4365 | ||
4366 | /* Sorts the key/value pairs in an object variant anywhere down the tree in the specified variant */ | |
4367 | ||
4368 | m = json_variant_elements(*v); | |
4369 | a = new(JsonVariant*, m); | |
4370 | if (!a) | |
4371 | return -ENOMEM; | |
4372 | ||
4373 | for (i = 0; i < m; i++) { | |
4374 | a[i] = json_variant_ref(json_variant_by_index(*v, i)); | |
4375 | ||
4376 | r = json_variant_normalize(a + i); | |
4377 | if (r < 0) | |
4378 | goto finish; | |
4379 | } | |
4380 | ||
4381 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4382 | ||
4383 | if (json_variant_is_object(*v)) | |
4384 | r = json_variant_new_object(&n, a, m); | |
4385 | else { | |
4386 | assert(json_variant_is_array(*v)); | |
4387 | r = json_variant_new_array(&n, a, m); | |
4388 | } | |
4389 | if (r < 0) | |
4390 | goto finish; | |
a10f5d05 MB |
4391 | |
4392 | json_variant_propagate_sensitive(*v, n); | |
4393 | ||
46cdbd49 BR |
4394 | if (!n->normalized) { /* Let's see if normalization worked. It will fail if there are multiple |
4395 | * identical keys used in the same object anywhere, or if there are floating | |
4396 | * point numbers used (see below) */ | |
4397 | r = -ENOTUNIQ; | |
4398 | goto finish; | |
4399 | } | |
4400 | ||
4401 | json_variant_unref(*v); | |
4402 | *v = n; | |
4403 | ||
4404 | r = 1; | |
4405 | ||
4406 | finish: | |
4407 | for (j = 0; j < i; j++) | |
4408 | json_variant_unref(a[j]); | |
4409 | ||
4410 | return r; | |
4411 | } | |
4412 | ||
4413 | bool json_variant_is_normalized(JsonVariant *v) { | |
4414 | ||
4415 | /* For now, let's consider anything containing numbers not expressible as integers as | |
4416 | * non-normalized. That's because we cannot sensibly compare them due to accuracy issues, nor even | |
4417 | * store them if they are too large. */ | |
4418 | if (json_variant_is_real(v) && !json_variant_is_integer(v) && !json_variant_is_unsigned(v)) | |
4419 | return false; | |
4420 | ||
4421 | /* The concept only applies to variants that include other variants, i.e. objects and arrays. All | |
4422 | * others are normalized anyway. */ | |
4423 | if (!json_variant_is_object(v) && !json_variant_is_array(v)) | |
4424 | return true; | |
4425 | ||
4426 | /* Empty objects/arrays don't include any other variant, hence are always normalized too */ | |
4427 | if (json_variant_elements(v) == 0) | |
4428 | return true; | |
4429 | ||
4430 | return v->normalized; /* For everything else there's an explicit boolean we maintain */ | |
4431 | } | |
4432 | ||
4433 | bool json_variant_is_sorted(JsonVariant *v) { | |
4434 | ||
4435 | /* Returns true if all key/value pairs of an object are properly sorted. Note that this only applies | |
4436 | * to objects, not arrays. */ | |
4437 | ||
4438 | if (!json_variant_is_object(v)) | |
4439 | return true; | |
4440 | if (json_variant_elements(v) <= 1) | |
4441 | return true; | |
4442 | ||
4443 | return v->sorted; | |
4444 | } | |
4445 | ||
4446 | int json_variant_unbase64(JsonVariant *v, void **ret, size_t *ret_size) { | |
4447 | ||
4448 | if (!json_variant_is_string(v)) | |
4449 | return -EINVAL; | |
4450 | ||
3a6ce677 BR |
4451 | return unbase64mem(json_variant_string(v), SIZE_MAX, ret, ret_size); |
4452 | } | |
4453 | ||
4454 | int json_variant_unhex(JsonVariant *v, void **ret, size_t *ret_size) { | |
4455 | ||
4456 | if (!json_variant_is_string(v)) | |
4457 | return -EINVAL; | |
4458 | ||
4459 | return unhexmem(json_variant_string(v), SIZE_MAX, ret, ret_size); | |
46cdbd49 BR |
4460 | } |
4461 | ||
6e866b33 MB |
4462 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { |
4463 | [JSON_VARIANT_STRING] = "string", | |
4464 | [JSON_VARIANT_INTEGER] = "integer", | |
4465 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
4466 | [JSON_VARIANT_REAL] = "real", | |
4467 | [JSON_VARIANT_NUMBER] = "number", | |
4468 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
4469 | [JSON_VARIANT_ARRAY] = "array", | |
4470 | [JSON_VARIANT_OBJECT] = "object", | |
4471 | [JSON_VARIANT_NULL] = "null", | |
4472 | }; | |
4473 | ||
4474 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |