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Commit | Line | Data |
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1e59de90 TL |
1 | /* |
2 | * Example debug transport with a local debug message encoder/decoder. | |
3 | * | |
4 | * Provides a "received dvalue" callback for a fully parsed dvalue (user | |
5 | * code frees dvalue) and a "cooperate" callback for e.g. UI integration. | |
6 | * There are a few other callbacks. See test.c for usage examples. | |
7 | * | |
8 | * This transport implementation is not multithreaded which means that: | |
9 | * | |
10 | * - Callbacks to "received dvalue" callback come from the Duktape thread, | |
11 | * either during normal execution or from duk_debugger_cooperate(). | |
12 | * | |
13 | * - Calls into duk_trans_dvalue_send() must be made from the callbacks | |
14 | * provided (e.g. "received dvalue" or "cooperate") which use the active | |
15 | * Duktape thread. | |
16 | * | |
17 | * - The only exception to this is when Duktape is idle: you can then call | |
18 | * duk_trans_dvalue_send() from any thread (only one thread at a time). | |
19 | * When you next call into Duktape or call duk_debugger_cooperate(), the | |
20 | * queued data will be read and processed by Duktape. | |
21 | * | |
22 | * There are functions for creating and freeing values; internally they use | |
23 | * malloc() and free() for memory management. Duktape heap alloc functions | |
24 | * are not used to minimize disturbances to the Duktape heap under debugging. | |
25 | * | |
26 | * Doesn't depend on C99 types; assumes "int" is at least 32 bits, and makes | |
27 | * a few assumptions about format specifiers. | |
28 | */ | |
29 | ||
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <string.h> | |
33 | ||
34 | #include "duktape.h" | |
35 | #include "duk_trans_dvalue.h" | |
36 | ||
37 | /* Define to enable debug prints to stderr. */ | |
38 | #if 0 | |
39 | #define DEBUG_PRINTS | |
40 | #endif | |
41 | ||
42 | /* Define to enable error prints to stderr. */ | |
43 | #if 1 | |
44 | #define ERROR_PRINTS | |
45 | #endif | |
46 | ||
47 | /* | |
48 | * Dvalue handling | |
49 | */ | |
50 | ||
51 | duk_dvalue *duk_dvalue_alloc(void) { | |
52 | duk_dvalue *dv = (duk_dvalue *) malloc(sizeof(duk_dvalue)); | |
53 | if (dv) { | |
54 | memset((void *) dv, 0, sizeof(duk_dvalue)); | |
55 | dv->buf = NULL; | |
56 | } | |
57 | return dv; | |
58 | } | |
59 | ||
60 | void duk_dvalue_free(duk_dvalue *dv) { | |
61 | if (dv) { | |
62 | free(dv->buf); /* tolerates NULL */ | |
63 | dv->buf = NULL; | |
64 | free(dv); | |
65 | } | |
66 | } | |
67 | ||
68 | static void duk__dvalue_bufesc(duk_dvalue *dv, char *buf, size_t maxbytes, int stresc) { | |
69 | size_t i, limit; | |
70 | ||
71 | *buf = (char) 0; | |
72 | limit = dv->len > maxbytes ? maxbytes : dv->len; | |
73 | for (i = 0; i < limit; i++) { | |
74 | unsigned char c = dv->buf[i]; | |
75 | if (stresc) { | |
76 | if (c >= 0x20 && c <= 0x7e && c != (char) '"' && c != (char) '\'') { | |
77 | sprintf(buf, "%c", c); | |
78 | buf++; | |
79 | } else { | |
80 | sprintf(buf, "\\x%02x", (unsigned int) c); | |
81 | buf += 4; | |
82 | } | |
83 | } else { | |
84 | sprintf(buf, "%02x", (unsigned int) c); | |
85 | buf += 2; | |
86 | } | |
87 | } | |
88 | if (dv->len > maxbytes) { | |
89 | sprintf(buf, "..."); | |
90 | buf += 3; | |
91 | } | |
92 | } | |
93 | ||
94 | /* Caller must provide a buffer at least DUK_DVALUE_TOSTRING_BUFLEN in size. */ | |
95 | void duk_dvalue_to_string(duk_dvalue *dv, char *buf) { | |
96 | char hexbuf[32 * 4 + 4]; /* 32 hex encoded or \xXX escaped bytes, possible "...", NUL */ | |
97 | ||
98 | if (!dv) { | |
99 | sprintf(buf, "NULL"); | |
100 | return; | |
101 | } | |
102 | ||
103 | switch (dv->tag) { | |
104 | case DUK_DVALUE_EOM: | |
105 | sprintf(buf, "EOM"); | |
106 | break; | |
107 | case DUK_DVALUE_REQ: | |
108 | sprintf(buf, "REQ"); | |
109 | break; | |
110 | case DUK_DVALUE_REP: | |
111 | sprintf(buf, "REP"); | |
112 | break; | |
113 | case DUK_DVALUE_ERR: | |
114 | sprintf(buf, "ERR"); | |
115 | break; | |
116 | case DUK_DVALUE_NFY: | |
117 | sprintf(buf, "NFY"); | |
118 | break; | |
119 | case DUK_DVALUE_INTEGER: | |
120 | sprintf(buf, "%d", dv->i); | |
121 | break; | |
122 | case DUK_DVALUE_STRING: | |
123 | duk__dvalue_bufesc(dv, hexbuf, 32, 1); | |
124 | sprintf(buf, "str:%ld:\"%s\"", (long) dv->len, hexbuf); | |
125 | break; | |
126 | case DUK_DVALUE_BUFFER: | |
127 | duk__dvalue_bufesc(dv, hexbuf, 32, 0); | |
128 | sprintf(buf, "buf:%ld:%s", (long) dv->len, hexbuf); | |
129 | break; | |
130 | case DUK_DVALUE_UNUSED: | |
131 | sprintf(buf, "undefined"); | |
132 | break; | |
133 | case DUK_DVALUE_UNDEFINED: | |
134 | sprintf(buf, "undefined"); | |
135 | break; | |
136 | case DUK_DVALUE_NULL: | |
137 | sprintf(buf, "null"); | |
138 | break; | |
139 | case DUK_DVALUE_TRUE: | |
140 | sprintf(buf, "true"); | |
141 | break; | |
142 | case DUK_DVALUE_FALSE: | |
143 | sprintf(buf, "false"); | |
144 | break; | |
145 | case DUK_DVALUE_NUMBER: | |
146 | if (fpclassify(dv->d) == FP_ZERO) { | |
147 | if (signbit(dv->d)) { | |
148 | sprintf(buf, "-0"); | |
149 | } else { | |
150 | sprintf(buf, "0"); | |
151 | } | |
152 | } else { | |
153 | sprintf(buf, "%lg", dv->d); | |
154 | } | |
155 | break; | |
156 | case DUK_DVALUE_OBJECT: | |
157 | duk__dvalue_bufesc(dv, hexbuf, 32, 0); | |
158 | sprintf(buf, "obj:%d:%s", (int) dv->i, hexbuf); | |
159 | break; | |
160 | case DUK_DVALUE_POINTER: | |
161 | duk__dvalue_bufesc(dv, hexbuf, 32, 0); | |
162 | sprintf(buf, "ptr:%s", hexbuf); | |
163 | break; | |
164 | case DUK_DVALUE_LIGHTFUNC: | |
165 | duk__dvalue_bufesc(dv, hexbuf, 32, 0); | |
166 | sprintf(buf, "lfunc:%04x:%s", (unsigned int) dv->i, hexbuf); | |
167 | break; | |
168 | case DUK_DVALUE_HEAPPTR: | |
169 | duk__dvalue_bufesc(dv, hexbuf, 32, 0); | |
170 | sprintf(buf, "heapptr:%s", hexbuf); | |
171 | break; | |
172 | default: | |
173 | sprintf(buf, "unknown:%d", (int) dv->tag); | |
174 | } | |
175 | } | |
176 | ||
177 | duk_dvalue *duk_dvalue_make_tag(int tag) { | |
178 | duk_dvalue *dv = duk_dvalue_alloc(); | |
179 | if (!dv) { return NULL; } | |
180 | dv->tag = tag; | |
181 | return dv; | |
182 | } | |
183 | ||
184 | duk_dvalue *duk_dvalue_make_tag_int(int tag, int intval) { | |
185 | duk_dvalue *dv = duk_dvalue_alloc(); | |
186 | if (!dv) { return NULL; } | |
187 | dv->tag = tag; | |
188 | dv->i = intval; | |
189 | return dv; | |
190 | } | |
191 | ||
192 | duk_dvalue *duk_dvalue_make_tag_double(int tag, double dblval) { | |
193 | duk_dvalue *dv = duk_dvalue_alloc(); | |
194 | if (!dv) { return NULL; } | |
195 | dv->tag = tag; | |
196 | dv->d = dblval; | |
197 | return dv; | |
198 | } | |
199 | ||
200 | duk_dvalue *duk_dvalue_make_tag_data(int tag, const char *buf, size_t len) { | |
201 | unsigned char *p; | |
202 | duk_dvalue *dv = duk_dvalue_alloc(); | |
203 | if (!dv) { return NULL; } | |
204 | /* Alloc size is len + 1 so that a NUL terminator is always | |
205 | * guaranteed which is convenient, e.g. you can printf() the | |
206 | * value safely. | |
207 | */ | |
208 | p = (unsigned char *) malloc(len + 1); | |
209 | if (!p) { | |
210 | free(dv); | |
211 | return NULL; | |
212 | } | |
213 | memcpy((void *) p, (const void *) buf, len); | |
214 | p[len] = (unsigned char) 0; | |
215 | dv->tag = tag; | |
216 | dv->buf = p; | |
217 | dv->len = len; | |
218 | return dv; | |
219 | } | |
220 | ||
221 | duk_dvalue *duk_dvalue_make_tag_int_data(int tag, int intval, const char *buf, size_t len) { | |
222 | duk_dvalue *dv = duk_dvalue_make_tag_data(tag, buf, len); | |
223 | if (!dv) { return NULL; } | |
224 | dv->i = intval; | |
225 | return dv; | |
226 | } | |
227 | ||
228 | /* | |
229 | * Dvalue transport handling | |
230 | */ | |
231 | ||
232 | static void duk__trans_dvalue_double_byteswap(duk_trans_dvalue_ctx *ctx, volatile unsigned char *p) { | |
233 | unsigned char t; | |
234 | ||
235 | /* Portable IEEE double byteswap. Relies on runtime detection of | |
236 | * host endianness. | |
237 | */ | |
238 | ||
239 | if (ctx->double_byteorder == 0) { | |
240 | /* little endian */ | |
241 | t = p[0]; p[0] = p[7]; p[7] = t; | |
242 | t = p[1]; p[1] = p[6]; p[6] = t; | |
243 | t = p[2]; p[2] = p[5]; p[5] = t; | |
244 | t = p[3]; p[3] = p[4]; p[4] = t; | |
245 | } else if (ctx->double_byteorder == 1) { | |
246 | /* big endian: ok as is */ | |
247 | ; | |
248 | } else { | |
249 | /* mixed endian */ | |
250 | t = p[0]; p[0] = p[3]; p[3] = t; | |
251 | t = p[1]; p[1] = p[2]; p[2] = t; | |
252 | t = p[4]; p[4] = p[7]; p[7] = t; | |
253 | t = p[5]; p[5] = p[6]; p[6] = t; | |
254 | } | |
255 | } | |
256 | ||
257 | static unsigned int duk__trans_dvalue_parse_u32(duk_trans_dvalue_ctx *ctx, unsigned char *p) { | |
258 | /* Integers are network endian, read back into host format in | |
259 | * a portable manner. | |
260 | */ | |
261 | (void) ctx; | |
262 | return (((unsigned int) p[0]) << 24) + | |
263 | (((unsigned int) p[1]) << 16) + | |
264 | (((unsigned int) p[2]) << 8) + | |
265 | (((unsigned int) p[3]) << 0); | |
266 | } | |
267 | ||
268 | static int duk__trans_dvalue_parse_i32(duk_trans_dvalue_ctx *ctx, unsigned char *p) { | |
269 | /* Portable sign handling, doesn't assume 'int' is exactly 32 bits | |
270 | * like a direct cast would. | |
271 | */ | |
272 | unsigned int tmp = duk__trans_dvalue_parse_u32(ctx, p); | |
273 | if (tmp & 0x80000000UL) { | |
274 | return -((int) ((tmp ^ 0xffffffffUL) + 1UL)); | |
275 | } else { | |
276 | return tmp; | |
277 | } | |
278 | } | |
279 | ||
280 | static unsigned int duk__trans_dvalue_parse_u16(duk_trans_dvalue_ctx *ctx, unsigned char *p) { | |
281 | /* Integers are network endian, read back into host format. */ | |
282 | (void) ctx; | |
283 | return (((unsigned int) p[0]) << 8) + | |
284 | (((unsigned int) p[1]) << 0); | |
285 | } | |
286 | ||
287 | static double duk__trans_dvalue_parse_double(duk_trans_dvalue_ctx *ctx, unsigned char *p) { | |
288 | /* IEEE doubles are network endian, read back into host format. */ | |
289 | volatile union { | |
290 | double d; | |
291 | unsigned char b[8]; | |
292 | } u; | |
293 | memcpy((void *) u.b, (const void *) p, 8); | |
294 | duk__trans_dvalue_double_byteswap(ctx, u.b); | |
295 | return u.d; | |
296 | } | |
297 | ||
298 | static unsigned char *duk__trans_dvalue_encode_u32(duk_trans_dvalue_ctx *ctx, unsigned char *p, unsigned int val) { | |
299 | /* Integers are written in network endian format. */ | |
300 | (void) ctx; | |
301 | *p++ = (unsigned char) ((val >> 24) & 0xff); | |
302 | *p++ = (unsigned char) ((val >> 16) & 0xff); | |
303 | *p++ = (unsigned char) ((val >> 8) & 0xff); | |
304 | *p++ = (unsigned char) (val & 0xff); | |
305 | return p; | |
306 | } | |
307 | ||
308 | static unsigned char *duk__trans_dvalue_encode_i32(duk_trans_dvalue_ctx *ctx, unsigned char *p, int val) { | |
309 | return duk__trans_dvalue_encode_u32(ctx, p, (unsigned int) val & 0xffffffffUL); | |
310 | } | |
311 | ||
312 | static unsigned char *duk__trans_dvalue_encode_u16(duk_trans_dvalue_ctx *ctx, unsigned char *p, unsigned int val) { | |
313 | /* Integers are written in network endian format. */ | |
314 | (void) ctx; | |
315 | *p++ = (unsigned char) ((val >> 8) & 0xff); | |
316 | *p++ = (unsigned char) (val & 0xff); | |
317 | return p; | |
318 | } | |
319 | ||
320 | static unsigned char *duk__trans_dvalue_encode_double(duk_trans_dvalue_ctx *ctx, unsigned char *p, double val) { | |
321 | /* IEEE doubles are written in network endian format. */ | |
322 | volatile union { | |
323 | double d; | |
324 | unsigned char b[8]; | |
325 | } u; | |
326 | u.d = val; | |
327 | duk__trans_dvalue_double_byteswap(ctx, u.b); | |
328 | memcpy((void *) p, (const void *) u.b, 8); | |
329 | p += 8; | |
330 | return p; | |
331 | } | |
332 | ||
333 | static unsigned char *duk__trans_buffer_ensure(duk_trans_buffer *dbuf, size_t space) { | |
334 | size_t avail; | |
335 | size_t used; | |
336 | size_t new_size; | |
337 | void *new_alloc; | |
338 | ||
339 | used = dbuf->write_offset; | |
340 | avail = dbuf->alloc_size - dbuf->write_offset; | |
341 | ||
342 | if (avail >= space) { | |
343 | if (avail - space > 256) { | |
344 | /* Too big, resize so that we reclaim memory if we have just | |
345 | * received a large string/buffer value. | |
346 | */ | |
347 | goto do_realloc; | |
348 | } | |
349 | } else { | |
350 | /* Too small, resize. */ | |
351 | goto do_realloc; | |
352 | } | |
353 | ||
354 | return dbuf->base + dbuf->write_offset; | |
355 | ||
356 | do_realloc: | |
357 | new_size = used + space + 256; /* some extra to reduce resizes */ | |
358 | new_alloc = realloc(dbuf->base, new_size); | |
359 | if (new_alloc) { | |
360 | dbuf->base = (unsigned char *) new_alloc; | |
361 | dbuf->alloc_size = new_size; | |
362 | #if defined(DEBUG_PRINTS) | |
363 | fprintf(stderr, "%s: resized buffer %p to %ld bytes, read_offset=%ld, write_offset=%ld\n", | |
364 | __func__, (void *) dbuf, (long) new_size, (long) dbuf->read_offset, (long) dbuf->write_offset); | |
365 | fflush(stderr); | |
366 | #endif | |
367 | return dbuf->base + dbuf->write_offset; | |
368 | } else { | |
369 | return NULL; | |
370 | } | |
371 | } | |
372 | ||
373 | /* When read_offset is large enough, "rebase" buffer by deleting already | |
374 | * read data and updating offsets. | |
375 | */ | |
376 | static void duk__trans_buffer_rebase(duk_trans_buffer *dbuf) { | |
377 | if (dbuf->read_offset > 64) { | |
378 | #if defined(DEBUG_PRINTS) | |
379 | fprintf(stderr, "%s: rebasing buffer %p, read_offset=%ld, write_offset=%ld\n", | |
380 | __func__, (void *) dbuf, (long) dbuf->read_offset, (long) dbuf->write_offset); | |
381 | fflush(stderr); | |
382 | #endif | |
383 | if (dbuf->write_offset > dbuf->read_offset) { | |
384 | memmove((void *) dbuf->base, (const void *) (dbuf->base + dbuf->read_offset), dbuf->write_offset - dbuf->read_offset); | |
385 | } | |
386 | dbuf->write_offset -= dbuf->read_offset; | |
387 | dbuf->read_offset = 0; | |
388 | } | |
389 | } | |
390 | ||
391 | duk_trans_dvalue_ctx *duk_trans_dvalue_init(void) { | |
392 | volatile union { | |
393 | double d; | |
394 | unsigned char b[8]; | |
395 | } u; | |
396 | duk_trans_dvalue_ctx *ctx = NULL; | |
397 | ||
398 | ctx = (duk_trans_dvalue_ctx *) malloc(sizeof(duk_trans_dvalue_ctx)); | |
399 | if (!ctx) { goto fail; } | |
400 | memset((void *) ctx, 0, sizeof(duk_trans_dvalue_ctx)); | |
401 | ctx->received = NULL; | |
402 | ctx->cooperate = NULL; | |
403 | ctx->handshake = NULL; | |
404 | ctx->detached = NULL; | |
405 | ctx->send_buf.base = NULL; | |
406 | ctx->recv_buf.base = NULL; | |
407 | ||
408 | ctx->send_buf.base = malloc(256); | |
409 | if (!ctx->send_buf.base) { goto fail; } | |
410 | ctx->send_buf.alloc_size = 256; | |
411 | ||
412 | ctx->recv_buf.base = malloc(256); | |
413 | if (!ctx->recv_buf.base) { goto fail; } | |
414 | ctx->recv_buf.alloc_size = 256; | |
415 | ||
416 | /* IEEE double byte order, detect at run time (could also use | |
417 | * preprocessor defines but that's verbose to make portable). | |
418 | * | |
419 | * >>> struct.unpack('>d', '1122334455667788'.decode('hex')) | |
420 | * (3.841412024471731e-226,) | |
421 | * >>> struct.unpack('>d', '8877665544332211'.decode('hex')) | |
422 | * (-7.086876636573014e-268,) | |
423 | * >>> struct.unpack('>d', '4433221188776655'.decode('hex')) | |
424 | * (3.5294303071877444e+20,) | |
425 | */ | |
426 | u.b[0] = 0x11; u.b[1] = 0x22; u.b[2] = 0x33; u.b[3] = 0x44; | |
427 | u.b[4] = 0x55; u.b[5] = 0x66; u.b[6] = 0x77; u.b[7] = 0x88; | |
428 | if (u.d < 0.0) { | |
429 | ctx->double_byteorder = 0; /* little endian */ | |
430 | } else if (u.d < 1.0) { | |
431 | ctx->double_byteorder = 1; /* big endian */ | |
432 | } else { | |
433 | ctx->double_byteorder = 2; /* mixed endian (arm) */ | |
434 | } | |
435 | #if defined(DEBUG_PRINTS) | |
436 | fprintf(stderr, "double endianness test value is %lg -> byteorder %d\n", | |
437 | u.d, ctx->double_byteorder); | |
438 | fflush(stderr); | |
439 | #endif | |
440 | ||
441 | return ctx; | |
442 | ||
443 | fail: | |
444 | if (ctx) { | |
445 | free(ctx->recv_buf.base); /* tolerates NULL */ | |
446 | free(ctx->send_buf.base); /* tolerates NULL */ | |
447 | free(ctx); | |
448 | } | |
449 | return NULL; | |
450 | } | |
451 | ||
452 | void duk_trans_dvalue_free(duk_trans_dvalue_ctx *ctx) { | |
453 | if (ctx) { | |
454 | free(ctx->send_buf.base); /* tolerates NULL */ | |
455 | free(ctx->recv_buf.base); /* tolerates NULL */ | |
456 | free(ctx); | |
457 | } | |
458 | } | |
459 | ||
460 | void duk_trans_dvalue_send(duk_trans_dvalue_ctx *ctx, duk_dvalue *dv) { | |
461 | unsigned char *p; | |
462 | ||
463 | /* Convert argument dvalue into Duktape debug protocol format. | |
464 | * Literal constants are used here for the debug protocol, | |
465 | * e.g. initial byte 0x02 is REP, see doc/debugger.rst. | |
466 | */ | |
467 | ||
468 | #if defined(DEBUG_PRINTS) | |
469 | { | |
470 | char buf[DUK_DVALUE_TOSTRING_BUFLEN]; | |
471 | duk_dvalue_to_string(dv, buf); | |
472 | fprintf(stderr, "%s: sending dvalue: %s\n", __func__, buf); | |
473 | fflush(stderr); | |
474 | } | |
475 | #endif | |
476 | ||
477 | switch (dv->tag) { | |
478 | case DUK_DVALUE_EOM: { | |
479 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
480 | if (!p) { goto alloc_error; } | |
481 | *p++ = 0x00; | |
482 | ctx->send_buf.write_offset += 1; | |
483 | break; | |
484 | } | |
485 | case DUK_DVALUE_REQ: { | |
486 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
487 | if (!p) { goto alloc_error; } | |
488 | *p++ = 0x01; | |
489 | ctx->send_buf.write_offset += 1; | |
490 | break; | |
491 | } | |
492 | case DUK_DVALUE_REP: { | |
493 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
494 | if (!p) { goto alloc_error; } | |
495 | *p++ = 0x02; | |
496 | ctx->send_buf.write_offset += 1; | |
497 | break; | |
498 | } | |
499 | case DUK_DVALUE_ERR: { | |
500 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
501 | if (!p) { goto alloc_error; } | |
502 | *p++ = 0x03; | |
503 | ctx->send_buf.write_offset += 1; | |
504 | break; | |
505 | } | |
506 | case DUK_DVALUE_NFY: { | |
507 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
508 | if (!p) { goto alloc_error; } | |
509 | *p++ = 0x04; | |
510 | ctx->send_buf.write_offset += 1; | |
511 | break; | |
512 | } | |
513 | case DUK_DVALUE_INTEGER: { | |
514 | int i = dv->i; | |
515 | if (i >= 0 && i <= 63) { | |
516 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
517 | if (!p) { goto alloc_error; } | |
518 | *p++ = (unsigned char) (0x80 + i); | |
519 | ctx->send_buf.write_offset += 1; | |
520 | } else if (i >= 0 && i <= 16383L) { | |
521 | p = duk__trans_buffer_ensure(&ctx->send_buf, 2); | |
522 | if (!p) { goto alloc_error; } | |
523 | *p++ = (unsigned char) (0xc0 + (i >> 8)); | |
524 | *p++ = (unsigned char) (i & 0xff); | |
525 | ctx->send_buf.write_offset += 2; | |
526 | } else if (i >= -0x80000000L && i <= 0x7fffffffL) { /* Harmless warning on some platforms (re: range) */ | |
527 | p = duk__trans_buffer_ensure(&ctx->send_buf, 5); | |
528 | if (!p) { goto alloc_error; } | |
529 | *p++ = 0x10; | |
530 | p = duk__trans_dvalue_encode_i32(ctx, p, i); | |
531 | ctx->send_buf.write_offset += 5; | |
532 | } else { | |
533 | goto dvalue_error; | |
534 | } | |
535 | break; | |
536 | } | |
537 | case DUK_DVALUE_STRING: { | |
538 | size_t i = dv->len; | |
539 | if (i <= 0x1fUL) { | |
540 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1 + i); | |
541 | if (!p) { goto alloc_error; } | |
542 | *p++ = (unsigned char) (0x60 + i); | |
543 | memcpy((void *) p, (const void *) dv->buf, i); | |
544 | p += i; | |
545 | ctx->send_buf.write_offset += 1 + i; | |
546 | } else if (i <= 0xffffUL) { | |
547 | p = duk__trans_buffer_ensure(&ctx->send_buf, 3 + i); | |
548 | if (!p) { goto alloc_error; } | |
549 | *p++ = 0x12; | |
550 | p = duk__trans_dvalue_encode_u16(ctx, p, (unsigned int) i); | |
551 | memcpy((void *) p, (const void *) dv->buf, i); | |
552 | p += i; | |
553 | ctx->send_buf.write_offset += 3 + i; | |
554 | } else if (i <= 0xffffffffUL) { | |
555 | p = duk__trans_buffer_ensure(&ctx->send_buf, 5 + i); | |
556 | if (!p) { goto alloc_error; } | |
557 | *p++ = 0x11; | |
558 | p = duk__trans_dvalue_encode_u32(ctx, p, (unsigned int) i); | |
559 | memcpy((void *) p, (const void *) dv->buf, i); | |
560 | p += i; | |
561 | ctx->send_buf.write_offset += 5 + i; | |
562 | } else { | |
563 | goto dvalue_error; | |
564 | } | |
565 | break; | |
566 | } | |
567 | case DUK_DVALUE_BUFFER: { | |
568 | size_t i = dv->len; | |
569 | if (i <= 0xffffUL) { | |
570 | p = duk__trans_buffer_ensure(&ctx->send_buf, 3 + i); | |
571 | if (!p) { goto alloc_error; } | |
572 | *p++ = 0x14; | |
573 | p = duk__trans_dvalue_encode_u16(ctx, p, (unsigned int) i); | |
574 | memcpy((void *) p, (const void *) dv->buf, i); | |
575 | p += i; | |
576 | ctx->send_buf.write_offset += 3 + i; | |
577 | } else if (i <= 0xffffffffUL) { | |
578 | p = duk__trans_buffer_ensure(&ctx->send_buf, 5 + i); | |
579 | if (!p) { goto alloc_error; } | |
580 | *p++ = 0x13; | |
581 | p = duk__trans_dvalue_encode_u32(ctx, p, (unsigned int) i); | |
582 | memcpy((void *) p, (const void *) dv->buf, i); | |
583 | p += i; | |
584 | ctx->send_buf.write_offset += 5 + i; | |
585 | } else { | |
586 | goto dvalue_error; | |
587 | } | |
588 | break; | |
589 | } | |
590 | case DUK_DVALUE_UNUSED: { | |
591 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
592 | if (!p) { goto alloc_error; } | |
593 | *p++ = 0x15; | |
594 | ctx->send_buf.write_offset += 1; | |
595 | break; | |
596 | } | |
597 | case DUK_DVALUE_UNDEFINED: { | |
598 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
599 | if (!p) { goto alloc_error; } | |
600 | *p++ = 0x16; | |
601 | ctx->send_buf.write_offset += 1; | |
602 | break; | |
603 | } | |
604 | case DUK_DVALUE_NULL: { | |
605 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
606 | if (!p) { goto alloc_error; } | |
607 | *p++ = 0x17; | |
608 | ctx->send_buf.write_offset += 1; | |
609 | break; | |
610 | } | |
611 | case DUK_DVALUE_TRUE: { | |
612 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
613 | if (!p) { goto alloc_error; } | |
614 | *p++ = 0x18; | |
615 | ctx->send_buf.write_offset += 1; | |
616 | break; | |
617 | } | |
618 | case DUK_DVALUE_FALSE: { | |
619 | p = duk__trans_buffer_ensure(&ctx->send_buf, 1); | |
620 | if (!p) { goto alloc_error; } | |
621 | *p++ = 0x19; | |
622 | ctx->send_buf.write_offset += 1; | |
623 | break; | |
624 | } | |
625 | case DUK_DVALUE_NUMBER: { | |
626 | p = duk__trans_buffer_ensure(&ctx->send_buf, 9); | |
627 | if (!p) { goto alloc_error; } | |
628 | *p++ = 0x1a; | |
629 | p = duk__trans_dvalue_encode_double(ctx, p, dv->d); | |
630 | ctx->send_buf.write_offset += 9; | |
631 | break; | |
632 | } | |
633 | case DUK_DVALUE_OBJECT: { | |
634 | size_t i = dv->len; | |
635 | if (i <= 0xffUL && dv->i >= 0 && dv->i <= 0xffL) { | |
636 | p = duk__trans_buffer_ensure(&ctx->send_buf, 3 + i); | |
637 | if (!p) { goto alloc_error; } | |
638 | *p++ = 0x1b; | |
639 | *p++ = (unsigned char) dv->i; | |
640 | *p++ = (unsigned char) i; | |
641 | memcpy((void *) p, (const void *) dv->buf, i); | |
642 | ctx->send_buf.write_offset += 3 + i; | |
643 | } else { | |
644 | goto dvalue_error; | |
645 | } | |
646 | break; | |
647 | } | |
648 | case DUK_DVALUE_POINTER: { | |
649 | size_t i = dv->len; | |
650 | if (i <= 0xffUL) { | |
651 | p = duk__trans_buffer_ensure(&ctx->send_buf, 2 + i); | |
652 | if (!p) { goto alloc_error; } | |
653 | *p++ = 0x1c; | |
654 | *p++ = (unsigned char) i; | |
655 | memcpy((void *) p, (const void *) dv->buf, i); | |
656 | ctx->send_buf.write_offset += 2 + i; | |
657 | } else { | |
658 | goto dvalue_error; | |
659 | } | |
660 | break; | |
661 | } | |
662 | case DUK_DVALUE_LIGHTFUNC: { | |
663 | size_t i = dv->len; | |
664 | if (i <= 0xffUL && dv->i >= 0 && dv->i <= 0xffffL) { | |
665 | p = duk__trans_buffer_ensure(&ctx->send_buf, 4 + i); | |
666 | if (!p) { goto alloc_error; } | |
667 | *p++ = 0x1d; | |
668 | p = duk__trans_dvalue_encode_u16(ctx, p, (unsigned int) dv->i); | |
669 | *p++ = (unsigned char) i; | |
670 | memcpy((void *) p, (const void *) dv->buf, i); | |
671 | ctx->send_buf.write_offset += 4 + i; | |
672 | } else { | |
673 | goto dvalue_error; | |
674 | } | |
675 | break; | |
676 | } | |
677 | case DUK_DVALUE_HEAPPTR: { | |
678 | size_t i = dv->len; | |
679 | if (i <= 0xffUL) { | |
680 | p = duk__trans_buffer_ensure(&ctx->send_buf, 2 + i); | |
681 | if (!p) { goto alloc_error; } | |
682 | *p++ = 0x1e; | |
683 | *p++ = (unsigned char) i; | |
684 | memcpy((void *) p, (const void *) dv->buf, i); | |
685 | ctx->send_buf.write_offset += 2 + i; | |
686 | } else { | |
687 | goto dvalue_error; | |
688 | } | |
689 | break; | |
690 | } | |
691 | default: { | |
692 | goto dvalue_error; | |
693 | } | |
694 | } /* end switch */ | |
695 | ||
696 | return; | |
697 | ||
698 | dvalue_error: | |
699 | #if defined(ERROR_PRINTS) | |
700 | fprintf(stderr, "%s: internal error, argument dvalue is invalid\n", __func__); | |
701 | fflush(stdout); | |
702 | #endif | |
703 | return; | |
704 | ||
705 | alloc_error: | |
706 | #if defined(ERROR_PRINTS) | |
707 | fprintf(stderr, "%s: internal error, failed to allocate space for write\n", __func__); | |
708 | fflush(stdout); | |
709 | #endif | |
710 | return; | |
711 | } | |
712 | ||
713 | static void duk__trans_dvalue_send_and_free(duk_trans_dvalue_ctx *ctx, duk_dvalue *dv) { | |
714 | if (!dv) { return; } | |
715 | duk_trans_dvalue_send(ctx, dv); | |
716 | duk_dvalue_free(dv); | |
717 | } | |
718 | ||
719 | void duk_trans_dvalue_send_eom(duk_trans_dvalue_ctx *ctx) { | |
720 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_EOM)); | |
721 | } | |
722 | ||
723 | void duk_trans_dvalue_send_req(duk_trans_dvalue_ctx *ctx) { | |
724 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_REQ)); | |
725 | } | |
726 | ||
727 | void duk_trans_dvalue_send_rep(duk_trans_dvalue_ctx *ctx) { | |
728 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_REP)); | |
729 | } | |
730 | ||
731 | void duk_trans_dvalue_send_err(duk_trans_dvalue_ctx *ctx) { | |
732 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_ERR)); | |
733 | } | |
734 | ||
735 | void duk_trans_dvalue_send_nfy(duk_trans_dvalue_ctx *ctx) { | |
736 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_NFY)); | |
737 | } | |
738 | ||
739 | void duk_trans_dvalue_send_integer(duk_trans_dvalue_ctx *ctx, int val) { | |
740 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_int(DUK_DVALUE_INTEGER, val)); | |
741 | } | |
742 | ||
743 | void duk_trans_dvalue_send_string(duk_trans_dvalue_ctx *ctx, const char *str) { | |
744 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_data(DUK_DVALUE_STRING, str, strlen(str))); | |
745 | } | |
746 | ||
747 | void duk_trans_dvalue_send_lstring(duk_trans_dvalue_ctx *ctx, const char *str, size_t len) { | |
748 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_data(DUK_DVALUE_STRING, str, len)); | |
749 | } | |
750 | ||
751 | void duk_trans_dvalue_send_buffer(duk_trans_dvalue_ctx *ctx, const char *buf, size_t len) { | |
752 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_data(DUK_DVALUE_BUFFER, buf, len)); | |
753 | } | |
754 | ||
755 | void duk_trans_dvalue_send_unused(duk_trans_dvalue_ctx *ctx) { | |
756 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_UNUSED)); | |
757 | } | |
758 | ||
759 | void duk_trans_dvalue_send_undefined(duk_trans_dvalue_ctx *ctx) { | |
760 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_UNDEFINED)); | |
761 | } | |
762 | ||
763 | void duk_trans_dvalue_send_null(duk_trans_dvalue_ctx *ctx) { | |
764 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_NULL)); | |
765 | } | |
766 | ||
767 | void duk_trans_dvalue_send_true(duk_trans_dvalue_ctx *ctx) { | |
768 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_TRUE)); | |
769 | } | |
770 | ||
771 | void duk_trans_dvalue_send_false(duk_trans_dvalue_ctx *ctx) { | |
772 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag(DUK_DVALUE_FALSE)); | |
773 | } | |
774 | ||
775 | void duk_trans_dvalue_send_number(duk_trans_dvalue_ctx *ctx, double val) { | |
776 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_double(DUK_DVALUE_NUMBER, val)); | |
777 | } | |
778 | ||
779 | void duk_trans_dvalue_send_object(duk_trans_dvalue_ctx *ctx, int classnum, const char *ptr_data, size_t ptr_len) { | |
780 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_int_data(DUK_DVALUE_OBJECT, classnum, ptr_data, ptr_len)); | |
781 | } | |
782 | ||
783 | void duk_trans_dvalue_send_pointer(duk_trans_dvalue_ctx *ctx, const char *ptr_data, size_t ptr_len) { | |
784 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_data(DUK_DVALUE_POINTER, ptr_data, ptr_len)); | |
785 | } | |
786 | ||
787 | void duk_trans_dvalue_send_lightfunc(duk_trans_dvalue_ctx *ctx, int lf_flags, const char *ptr_data, size_t ptr_len) { | |
788 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_int_data(DUK_DVALUE_LIGHTFUNC, lf_flags, ptr_data, ptr_len)); | |
789 | } | |
790 | ||
791 | void duk_trans_dvalue_send_heapptr(duk_trans_dvalue_ctx *ctx, const char *ptr_data, size_t ptr_len) { | |
792 | duk__trans_dvalue_send_and_free(ctx, duk_dvalue_make_tag_data(DUK_DVALUE_HEAPPTR, ptr_data, ptr_len)); | |
793 | } | |
794 | ||
795 | void duk_trans_dvalue_send_req_cmd(duk_trans_dvalue_ctx *ctx, int cmd) { | |
796 | duk_trans_dvalue_send_req(ctx); | |
797 | duk_trans_dvalue_send_integer(ctx, cmd); | |
798 | } | |
799 | ||
800 | static duk_dvalue *duk__trans_trial_parse_dvalue(duk_trans_dvalue_ctx *ctx) { | |
801 | unsigned char *p; | |
802 | size_t len; | |
803 | unsigned char ib; | |
804 | duk_dvalue *dv; | |
805 | size_t datalen; | |
806 | ||
807 | p = ctx->recv_buf.base + ctx->recv_buf.read_offset; | |
808 | len = ctx->recv_buf.write_offset - ctx->recv_buf.read_offset; | |
809 | ||
810 | if (len == 0) { | |
811 | return NULL; | |
812 | } | |
813 | ib = p[0]; | |
814 | ||
815 | #if defined(DEBUG_PRINTS) | |
816 | { | |
817 | size_t i; | |
818 | fprintf(stderr, "%s: parsing dvalue, window:", __func__); | |
819 | for (i = 0; i < 16; i++) { | |
820 | if (i < len) { | |
821 | fprintf(stderr, " %02x", (unsigned int) p[i]); | |
822 | } else { | |
823 | fprintf(stderr, " ??"); | |
824 | } | |
825 | } | |
826 | fprintf(stderr, " (length %ld, read_offset %ld, write_offset %ld, alloc_size %ld)\n", | |
827 | (long) len, (long) ctx->recv_buf.read_offset, (long) ctx->recv_buf.write_offset, | |
828 | (long) ctx->recv_buf.alloc_size); | |
829 | fflush(stderr); | |
830 | } | |
831 | #endif | |
832 | ||
833 | if (ib <= 0x1fU) { | |
834 | /* 0x00 ... 0x1f */ | |
835 | switch (ib) { | |
836 | case 0x00: { | |
837 | ctx->recv_buf.read_offset += 1; | |
838 | dv = duk_dvalue_make_tag(DUK_DVALUE_EOM); | |
839 | if (!dv) { goto alloc_error; } | |
840 | return dv; | |
841 | } | |
842 | case 0x01: { | |
843 | ctx->recv_buf.read_offset += 1; | |
844 | dv = duk_dvalue_make_tag(DUK_DVALUE_REQ); | |
845 | if (!dv) { goto alloc_error; } | |
846 | return dv; | |
847 | } | |
848 | case 0x02: { | |
849 | ctx->recv_buf.read_offset += 1; | |
850 | dv = duk_dvalue_make_tag(DUK_DVALUE_REP); | |
851 | if (!dv) { goto alloc_error; } | |
852 | return dv; | |
853 | } | |
854 | case 0x03: { | |
855 | ctx->recv_buf.read_offset += 1; | |
856 | dv = duk_dvalue_make_tag(DUK_DVALUE_ERR); | |
857 | if (!dv) { goto alloc_error; } | |
858 | return dv; | |
859 | } | |
860 | case 0x04: { | |
861 | ctx->recv_buf.read_offset += 1; | |
862 | dv = duk_dvalue_make_tag(DUK_DVALUE_NFY); | |
863 | if (!dv) { goto alloc_error; } | |
864 | return dv; | |
865 | } | |
866 | case 0x10: { | |
867 | int intval; | |
868 | if (len < 5) { goto partial; } | |
869 | intval = duk__trans_dvalue_parse_i32(ctx, p + 1); | |
870 | ctx->recv_buf.read_offset += 5; | |
871 | dv = duk_dvalue_make_tag_int(DUK_DVALUE_INTEGER, intval); | |
872 | if (!dv) { goto alloc_error; } | |
873 | return dv; | |
874 | } | |
875 | case 0x11: { | |
876 | if (len < 5) { goto partial; } | |
877 | datalen = (size_t) duk__trans_dvalue_parse_u32(ctx, p + 1); | |
878 | if (len < 5 + datalen) { goto partial; } | |
879 | ctx->recv_buf.read_offset += 5 + datalen; | |
880 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_STRING, (const char *) (p + 5), datalen); | |
881 | if (!dv) { goto alloc_error; } | |
882 | return dv; | |
883 | } | |
884 | case 0x12: { | |
885 | if (len < 3) { goto partial; } | |
886 | datalen = (size_t) duk__trans_dvalue_parse_u16(ctx, p + 1); | |
887 | if (len < 3 + datalen) { goto partial; } | |
888 | ctx->recv_buf.read_offset += 3 + datalen; | |
889 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_STRING, (const char *) (p + 3), datalen); | |
890 | if (!dv) { goto alloc_error; } | |
891 | return dv; | |
892 | } | |
893 | case 0x13: { | |
894 | if (len < 5) { goto partial; } | |
895 | datalen = (size_t) duk__trans_dvalue_parse_u32(ctx, p + 1); | |
896 | if (len < 5 + datalen) { goto partial; } | |
897 | ctx->recv_buf.read_offset += 5 + datalen; | |
898 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_BUFFER, (const char *) (p + 5), datalen); | |
899 | if (!dv) { goto alloc_error; } | |
900 | return dv; | |
901 | } | |
902 | case 0x14: { | |
903 | if (len < 3) { goto partial; } | |
904 | datalen = (size_t) duk__trans_dvalue_parse_u16(ctx, p + 1); | |
905 | if (len < 3 + datalen) { goto partial; } | |
906 | ctx->recv_buf.read_offset += 3 + datalen; | |
907 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_BUFFER, (const char *) (p + 3), datalen); | |
908 | if (!dv) { goto alloc_error; } | |
909 | return dv; | |
910 | } | |
911 | case 0x15: { | |
912 | ctx->recv_buf.read_offset += 1; | |
913 | dv = duk_dvalue_make_tag(DUK_DVALUE_UNUSED); | |
914 | if (!dv) { goto alloc_error; } | |
915 | return dv; | |
916 | } | |
917 | case 0x16: { | |
918 | ctx->recv_buf.read_offset += 1; | |
919 | dv = duk_dvalue_make_tag(DUK_DVALUE_UNDEFINED); | |
920 | if (!dv) { goto alloc_error; } | |
921 | return dv; | |
922 | } | |
923 | case 0x17: { | |
924 | ctx->recv_buf.read_offset += 1; | |
925 | dv = duk_dvalue_make_tag(DUK_DVALUE_NULL); | |
926 | if (!dv) { goto alloc_error; } | |
927 | return dv; | |
928 | } | |
929 | case 0x18: { | |
930 | ctx->recv_buf.read_offset += 1; | |
931 | dv = duk_dvalue_make_tag(DUK_DVALUE_TRUE); | |
932 | if (!dv) { goto alloc_error; } | |
933 | return dv; | |
934 | } | |
935 | case 0x19: { | |
936 | ctx->recv_buf.read_offset += 1; | |
937 | dv = duk_dvalue_make_tag(DUK_DVALUE_FALSE); | |
938 | if (!dv) { goto alloc_error; } | |
939 | return dv; | |
940 | } | |
941 | case 0x1a: { | |
942 | double dblval; | |
943 | if (len < 9) { goto partial; } | |
944 | dblval = duk__trans_dvalue_parse_double(ctx, p + 1); | |
945 | ctx->recv_buf.read_offset += 9; | |
946 | dv = duk_dvalue_make_tag_double(DUK_DVALUE_NUMBER, dblval); | |
947 | if (!dv) { goto alloc_error; } | |
948 | return dv; | |
949 | } | |
950 | case 0x1b: { | |
951 | int classnum; | |
952 | if (len < 3) { goto partial; } | |
953 | datalen = (size_t) p[2]; | |
954 | if (len < 3 + datalen) { goto partial; } | |
955 | classnum = (int) p[1]; | |
956 | ctx->recv_buf.read_offset += 3 + datalen; | |
957 | dv = duk_dvalue_make_tag_int_data(DUK_DVALUE_OBJECT, classnum, (const char *) (p + 3), datalen); | |
958 | if (!dv) { goto alloc_error; } | |
959 | return dv; | |
960 | } | |
961 | case 0x1c: { | |
962 | if (len < 2) { goto partial; } | |
963 | datalen = (size_t) p[1]; | |
964 | if (len < 2 + datalen) { goto partial; } | |
965 | ctx->recv_buf.read_offset += 2 + datalen; | |
966 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_POINTER, (const char *) (p + 2), datalen); | |
967 | if (!dv) { goto alloc_error; } | |
968 | return dv; | |
969 | } | |
970 | case 0x1d: { | |
971 | int lf_flags; | |
972 | if (len < 4) { goto partial; } | |
973 | datalen = (size_t) p[3]; | |
974 | if (len < 4 + datalen) { goto partial; } | |
975 | lf_flags = (int) duk__trans_dvalue_parse_u16(ctx, p + 1); | |
976 | ctx->recv_buf.read_offset += 4 + datalen; | |
977 | dv = duk_dvalue_make_tag_int_data(DUK_DVALUE_LIGHTFUNC, lf_flags, (const char *) (p + 4), datalen); | |
978 | if (!dv) { goto alloc_error; } | |
979 | return dv; | |
980 | } | |
981 | case 0x1e: { | |
982 | if (len < 2) { goto partial; } | |
983 | datalen = (size_t) p[1]; | |
984 | if (len < 2 + datalen) { goto partial; } | |
985 | ctx->recv_buf.read_offset += 2 + datalen; | |
986 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_HEAPPTR, (const char *) (p + 2), datalen); | |
987 | if (!dv) { goto alloc_error; } | |
988 | return dv; | |
989 | } | |
990 | default: { | |
991 | goto format_error; | |
992 | } | |
993 | } /* end switch */ | |
994 | } else if (ib <= 0x5fU) { | |
995 | /* 0x20 ... 0x5f */ | |
996 | goto format_error; | |
997 | } else if (ib <= 0x7fU) { | |
998 | /* 0x60 ... 0x7f */ | |
999 | datalen = (size_t) (ib - 0x60U); | |
1000 | if (len < 1 + datalen) { goto partial; } | |
1001 | ctx->recv_buf.read_offset += 1 + datalen; | |
1002 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_STRING, (const char *) (p + 1), datalen); | |
1003 | if (!dv) { goto alloc_error; } | |
1004 | return dv; | |
1005 | } else if (ib <= 0xbfU) { | |
1006 | /* 0x80 ... 0xbf */ | |
1007 | int intval; | |
1008 | intval = (int) (ib - 0x80U); | |
1009 | ctx->recv_buf.read_offset += 1; | |
1010 | dv = duk_dvalue_make_tag_int(DUK_DVALUE_INTEGER, intval); | |
1011 | if (!dv) { goto alloc_error; } | |
1012 | return dv; | |
1013 | } else { | |
1014 | /* 0xc0 ... 0xff */ | |
1015 | int intval; | |
1016 | if (len < 2) { goto partial; } | |
1017 | intval = (((int) (ib - 0xc0U)) << 8) + (int) p[1]; | |
1018 | ctx->recv_buf.read_offset += 2; | |
1019 | dv = duk_dvalue_make_tag_int(DUK_DVALUE_INTEGER, intval); | |
1020 | if (!dv) { goto alloc_error; } | |
1021 | return dv; | |
1022 | } | |
1023 | ||
1024 | /* never here */ | |
1025 | ||
1026 | partial: | |
1027 | return NULL; | |
1028 | ||
1029 | alloc_error: | |
1030 | #if defined(ERROR_PRINTS) | |
1031 | fprintf(stderr, "%s: internal error, cannot allocate space for dvalue\n", __func__); | |
1032 | fflush(stdout); | |
1033 | #endif | |
1034 | return NULL; | |
1035 | ||
1036 | format_error: | |
1037 | #if defined(ERROR_PRINTS) | |
1038 | fprintf(stderr, "%s: internal error, dvalue format error\n", __func__); | |
1039 | fflush(stdout); | |
1040 | #endif | |
1041 | return NULL; | |
1042 | } | |
1043 | ||
1044 | static duk_dvalue *duk__trans_trial_parse_handshake(duk_trans_dvalue_ctx *ctx) { | |
1045 | unsigned char *p; | |
1046 | size_t len; | |
1047 | duk_dvalue *dv; | |
1048 | size_t i; | |
1049 | ||
1050 | p = ctx->recv_buf.base + ctx->recv_buf.read_offset; | |
1051 | len = ctx->recv_buf.write_offset - ctx->recv_buf.read_offset; | |
1052 | ||
1053 | for (i = 0; i < len; i++) { | |
1054 | if (p[i] == 0x0a) { | |
1055 | /* Handshake line is returned as a dvalue for convenience; it's | |
1056 | * not actually a part of the dvalue phase of the protocol. | |
1057 | */ | |
1058 | ctx->recv_buf.read_offset += i + 1; | |
1059 | dv = duk_dvalue_make_tag_data(DUK_DVALUE_STRING, (const char *) p, i); | |
1060 | if (!dv) { goto alloc_error; } | |
1061 | return dv; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | return NULL; | |
1066 | ||
1067 | alloc_error: | |
1068 | #if defined(ERROR_PRINTS) | |
1069 | fprintf(stderr, "%s: internal error, cannot allocate space for handshake line\n", __func__); | |
1070 | fflush(stdout); | |
1071 | #endif | |
1072 | return NULL; | |
1073 | } | |
1074 | ||
1075 | static void duk__trans_call_cooperate(duk_trans_dvalue_ctx *ctx, int block) { | |
1076 | if (ctx->cooperate) { | |
1077 | ctx->cooperate(ctx, block); | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | static void duk__trans_call_received(duk_trans_dvalue_ctx *ctx, duk_dvalue *dv) { | |
1082 | if (ctx->received) { | |
1083 | ctx->received(ctx, dv); | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | static void duk__trans_call_handshake(duk_trans_dvalue_ctx *ctx, const char *line) { | |
1088 | if (ctx->handshake) { | |
1089 | ctx->handshake(ctx, line); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | static void duk__trans_call_detached(duk_trans_dvalue_ctx *ctx) { | |
1094 | if (ctx->detached) { | |
1095 | ctx->detached(ctx); | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Duktape callbacks | |
1101 | */ | |
1102 | ||
1103 | duk_size_t duk_trans_dvalue_read_cb(void *udata, char *buffer, duk_size_t length) { | |
1104 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1105 | ||
1106 | #if defined(DEBUG_PRINTS) | |
1107 | fprintf(stderr, "%s: %p %p %ld\n", __func__, udata, (void *) buffer, (long) length); | |
1108 | fflush(stderr); | |
1109 | #endif | |
1110 | ||
1111 | duk__trans_call_cooperate(ctx, 0); | |
1112 | ||
1113 | for (;;) { | |
1114 | size_t avail, now; | |
1115 | ||
1116 | avail = (size_t) (ctx->send_buf.write_offset - ctx->send_buf.read_offset); | |
1117 | if (avail == 0) { | |
1118 | /* Must cooperate until user callback provides data. From | |
1119 | * Duktape's perspective we MUST block until data is received. | |
1120 | */ | |
1121 | duk__trans_call_cooperate(ctx, 1); | |
1122 | } else { | |
1123 | now = avail; | |
1124 | if (now > length) { | |
1125 | now = length; | |
1126 | } | |
1127 | memcpy((void *) buffer, (const void *) (ctx->send_buf.base + ctx->send_buf.read_offset), now); | |
1128 | duk__trans_buffer_rebase(&ctx->send_buf); | |
1129 | ctx->send_buf.read_offset += now; | |
1130 | return now; | |
1131 | } | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | duk_size_t duk_trans_dvalue_write_cb(void *udata, const char *buffer, duk_size_t length) { | |
1136 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1137 | unsigned char *p; | |
1138 | ||
1139 | #if defined(DEBUG_PRINTS) | |
1140 | fprintf(stderr, "%s: %p %p %ld\n", __func__, udata, (void *) buffer, (long) length); | |
1141 | fflush(stderr); | |
1142 | #endif | |
1143 | ||
1144 | duk__trans_call_cooperate(ctx, 0); | |
1145 | ||
1146 | /* Append data. */ | |
1147 | duk__trans_buffer_rebase(&ctx->recv_buf); | |
1148 | p = duk__trans_buffer_ensure(&ctx->recv_buf, length); | |
1149 | memcpy((void *) p, (const void *) buffer, (size_t) length); | |
1150 | ctx->recv_buf.write_offset += length; | |
1151 | ||
1152 | /* Trial parse handshake line or dvalue(s). */ | |
1153 | if (!ctx->handshake_done) { | |
1154 | duk_dvalue *dv = duk__trans_trial_parse_handshake(ctx); | |
1155 | if (dv) { | |
1156 | /* Handshake line is available for caller for the | |
1157 | * duration of the callback, and must not be freed | |
1158 | * by the caller. | |
1159 | */ | |
1160 | duk__trans_call_handshake(ctx, (const char *) dv->buf); | |
1161 | #if defined(DEBUG_PRINTS) | |
1162 | fprintf(stderr, "%s: handshake ok\n", __func__); | |
1163 | fflush(stderr); | |
1164 | #endif | |
1165 | duk_dvalue_free(dv); | |
1166 | ctx->handshake_done = 1; | |
1167 | } | |
1168 | } | |
1169 | if (ctx->handshake_done) { | |
1170 | for (;;) { | |
1171 | duk_dvalue *dv = duk__trans_trial_parse_dvalue(ctx); | |
1172 | if (dv) { | |
1173 | #if defined(DEBUG_PRINTS) | |
1174 | { | |
1175 | char buf[DUK_DVALUE_TOSTRING_BUFLEN]; | |
1176 | duk_dvalue_to_string(dv, buf); | |
1177 | fprintf(stderr, "%s: received dvalue: %s\n", __func__, buf); | |
1178 | fflush(stderr); | |
1179 | } | |
1180 | #endif | |
1181 | ||
1182 | duk__trans_call_received(ctx, dv); | |
1183 | } else { | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | duk__trans_call_cooperate(ctx, 0); /* just in case, if dvalues changed something */ | |
1190 | ||
1191 | return length; | |
1192 | } | |
1193 | ||
1194 | duk_size_t duk_trans_dvalue_peek_cb(void *udata) { | |
1195 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1196 | size_t avail; | |
1197 | ||
1198 | #if defined(DEBUG_PRINTS) | |
1199 | fprintf(stderr, "%s: %p\n", __func__, udata); | |
1200 | fflush(stderr); | |
1201 | #endif | |
1202 | ||
1203 | duk__trans_call_cooperate(ctx, 0); | |
1204 | avail = (size_t) (ctx->send_buf.write_offset - ctx->send_buf.read_offset); | |
1205 | return (duk_size_t) avail; | |
1206 | } | |
1207 | ||
1208 | void duk_trans_dvalue_read_flush_cb(void *udata) { | |
1209 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1210 | ||
1211 | #if defined(DEBUG_PRINTS) | |
1212 | fprintf(stderr, "%s: %p\n", __func__, udata); | |
1213 | fflush(stderr); | |
1214 | #endif | |
1215 | ||
1216 | duk__trans_call_cooperate(ctx, 0); | |
1217 | } | |
1218 | ||
1219 | void duk_trans_dvalue_write_flush_cb(void *udata) { | |
1220 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1221 | ||
1222 | #if defined(DEBUG_PRINTS) | |
1223 | fprintf(stderr, "%s: %p\n", __func__, udata); | |
1224 | fflush(stderr); | |
1225 | #endif | |
1226 | ||
1227 | duk__trans_call_cooperate(ctx, 0); | |
1228 | } | |
1229 | ||
1230 | void duk_trans_dvalue_detached_cb(void *udata) { | |
1231 | duk_trans_dvalue_ctx *ctx = (duk_trans_dvalue_ctx *) udata; | |
1232 | ||
1233 | #if defined(DEBUG_PRINTS) | |
1234 | fprintf(stderr, "%s: %p\n", __func__, udata); | |
1235 | fflush(stderr); | |
1236 | #endif | |
1237 | ||
1238 | duk__trans_call_detached(ctx); | |
1239 | } |