]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/lib/vsprintf.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | */ | |
6 | ||
7 | /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ | |
8 | /* | |
9 | * Wirzenius wrote this portably, Torvalds fucked it up :-) | |
10 | */ | |
11 | ||
7b9186f5 | 12 | /* |
1da177e4 LT |
13 | * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com> |
14 | * - changed to provide snprintf and vsnprintf functions | |
15 | * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de> | |
16 | * - scnprintf and vscnprintf | |
17 | */ | |
18 | ||
19 | #include <stdarg.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/ctype.h> | |
24 | #include <linux/kernel.h> | |
0fe1ef24 LT |
25 | #include <linux/kallsyms.h> |
26 | #include <linux/uaccess.h> | |
332d2e78 | 27 | #include <linux/ioport.h> |
8a27f7c9 | 28 | #include <net/addrconf.h> |
1da177e4 | 29 | |
4e57b681 | 30 | #include <asm/page.h> /* for PAGE_SIZE */ |
1da177e4 | 31 | #include <asm/div64.h> |
deac93df | 32 | #include <asm/sections.h> /* for dereference_function_descriptor() */ |
1da177e4 | 33 | |
9b706aee DV |
34 | /* Works only for digits and letters, but small and fast */ |
35 | #define TOLOWER(x) ((x) | 0x20) | |
36 | ||
aa46a63e HH |
37 | static unsigned int simple_guess_base(const char *cp) |
38 | { | |
39 | if (cp[0] == '0') { | |
40 | if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) | |
41 | return 16; | |
42 | else | |
43 | return 8; | |
44 | } else { | |
45 | return 10; | |
46 | } | |
47 | } | |
48 | ||
1da177e4 | 49 | /** |
922ac25c | 50 | * simple_strtoull - convert a string to an unsigned long long |
1da177e4 LT |
51 | * @cp: The start of the string |
52 | * @endp: A pointer to the end of the parsed string will be placed here | |
53 | * @base: The number base to use | |
54 | */ | |
922ac25c | 55 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
1da177e4 | 56 | { |
922ac25c | 57 | unsigned long long result = 0; |
aa46a63e HH |
58 | |
59 | if (!base) | |
60 | base = simple_guess_base(cp); | |
61 | ||
62 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') | |
63 | cp += 2; | |
64 | ||
65 | while (isxdigit(*cp)) { | |
66 | unsigned int value; | |
67 | ||
68 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; | |
69 | if (value >= base) | |
70 | break; | |
71 | result = result * base + value; | |
1da177e4 LT |
72 | cp++; |
73 | } | |
74 | if (endp) | |
75 | *endp = (char *)cp; | |
7b9186f5 | 76 | |
1da177e4 LT |
77 | return result; |
78 | } | |
922ac25c | 79 | EXPORT_SYMBOL(simple_strtoull); |
1da177e4 LT |
80 | |
81 | /** | |
922ac25c | 82 | * simple_strtoul - convert a string to an unsigned long |
1da177e4 LT |
83 | * @cp: The start of the string |
84 | * @endp: A pointer to the end of the parsed string will be placed here | |
85 | * @base: The number base to use | |
86 | */ | |
922ac25c | 87 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
1da177e4 | 88 | { |
922ac25c | 89 | return simple_strtoull(cp, endp, base); |
1da177e4 | 90 | } |
922ac25c | 91 | EXPORT_SYMBOL(simple_strtoul); |
1da177e4 LT |
92 | |
93 | /** | |
922ac25c | 94 | * simple_strtol - convert a string to a signed long |
1da177e4 LT |
95 | * @cp: The start of the string |
96 | * @endp: A pointer to the end of the parsed string will be placed here | |
97 | * @base: The number base to use | |
98 | */ | |
922ac25c | 99 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
1da177e4 | 100 | { |
922ac25c AGR |
101 | if (*cp == '-') |
102 | return -simple_strtoul(cp + 1, endp, base); | |
7b9186f5 | 103 | |
922ac25c | 104 | return simple_strtoul(cp, endp, base); |
1da177e4 | 105 | } |
922ac25c | 106 | EXPORT_SYMBOL(simple_strtol); |
1da177e4 LT |
107 | |
108 | /** | |
109 | * simple_strtoll - convert a string to a signed long long | |
110 | * @cp: The start of the string | |
111 | * @endp: A pointer to the end of the parsed string will be placed here | |
112 | * @base: The number base to use | |
113 | */ | |
22d27051 | 114 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
1da177e4 | 115 | { |
7b9186f5 | 116 | if (*cp == '-') |
22d27051 | 117 | return -simple_strtoull(cp + 1, endp, base); |
7b9186f5 | 118 | |
22d27051 | 119 | return simple_strtoull(cp, endp, base); |
1da177e4 | 120 | } |
98d5ce0d | 121 | EXPORT_SYMBOL(simple_strtoll); |
1da177e4 | 122 | |
06b2a76d YY |
123 | /** |
124 | * strict_strtoul - convert a string to an unsigned long strictly | |
125 | * @cp: The string to be converted | |
126 | * @base: The number base to use | |
127 | * @res: The converted result value | |
128 | * | |
129 | * strict_strtoul converts a string to an unsigned long only if the | |
130 | * string is really an unsigned long string, any string containing | |
131 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
132 | * only a newline char at the tail is acceptible because people generally | |
133 | * change a module parameter in the following way: | |
134 | * | |
135 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
136 | * | |
137 | * echo will append a newline to the tail. | |
138 | * | |
139 | * It returns 0 if conversion is successful and *res is set to the converted | |
140 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
141 | * | |
142 | * simple_strtoul just ignores the successive invalid characters and | |
143 | * return the converted value of prefix part of the string. | |
144 | */ | |
9d85db22 HH |
145 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
146 | { | |
147 | char *tail; | |
148 | unsigned long val; | |
9d85db22 HH |
149 | |
150 | *res = 0; | |
559b140a | 151 | if (!*cp) |
9d85db22 HH |
152 | return -EINVAL; |
153 | ||
154 | val = simple_strtoul(cp, &tail, base); | |
e899aa82 PM |
155 | if (tail == cp) |
156 | return -EINVAL; | |
7b9186f5 | 157 | |
559b140a | 158 | if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { |
9d85db22 HH |
159 | *res = val; |
160 | return 0; | |
161 | } | |
162 | ||
163 | return -EINVAL; | |
164 | } | |
165 | EXPORT_SYMBOL(strict_strtoul); | |
06b2a76d YY |
166 | |
167 | /** | |
168 | * strict_strtol - convert a string to a long strictly | |
169 | * @cp: The string to be converted | |
170 | * @base: The number base to use | |
171 | * @res: The converted result value | |
172 | * | |
173 | * strict_strtol is similiar to strict_strtoul, but it allows the first | |
174 | * character of a string is '-'. | |
175 | * | |
176 | * It returns 0 if conversion is successful and *res is set to the converted | |
177 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
178 | */ | |
9d85db22 HH |
179 | int strict_strtol(const char *cp, unsigned int base, long *res) |
180 | { | |
181 | int ret; | |
182 | if (*cp == '-') { | |
183 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); | |
184 | if (!ret) | |
185 | *res = -(*res); | |
186 | } else { | |
187 | ret = strict_strtoul(cp, base, (unsigned long *)res); | |
188 | } | |
189 | ||
190 | return ret; | |
191 | } | |
192 | EXPORT_SYMBOL(strict_strtol); | |
06b2a76d YY |
193 | |
194 | /** | |
195 | * strict_strtoull - convert a string to an unsigned long long strictly | |
196 | * @cp: The string to be converted | |
197 | * @base: The number base to use | |
198 | * @res: The converted result value | |
199 | * | |
200 | * strict_strtoull converts a string to an unsigned long long only if the | |
201 | * string is really an unsigned long long string, any string containing | |
202 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
203 | * only a newline char at the tail is acceptible because people generally | |
204 | * change a module parameter in the following way: | |
205 | * | |
206 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
207 | * | |
208 | * echo will append a newline to the tail of the string. | |
209 | * | |
210 | * It returns 0 if conversion is successful and *res is set to the converted | |
211 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
212 | * | |
213 | * simple_strtoull just ignores the successive invalid characters and | |
214 | * return the converted value of prefix part of the string. | |
215 | */ | |
9d85db22 HH |
216 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
217 | { | |
218 | char *tail; | |
219 | unsigned long long val; | |
9d85db22 HH |
220 | |
221 | *res = 0; | |
559b140a | 222 | if (!*cp) |
9d85db22 HH |
223 | return -EINVAL; |
224 | ||
225 | val = simple_strtoull(cp, &tail, base); | |
e899aa82 PM |
226 | if (tail == cp) |
227 | return -EINVAL; | |
559b140a | 228 | if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { |
9d85db22 HH |
229 | *res = val; |
230 | return 0; | |
231 | } | |
232 | ||
233 | return -EINVAL; | |
234 | } | |
235 | EXPORT_SYMBOL(strict_strtoull); | |
06b2a76d YY |
236 | |
237 | /** | |
238 | * strict_strtoll - convert a string to a long long strictly | |
239 | * @cp: The string to be converted | |
240 | * @base: The number base to use | |
241 | * @res: The converted result value | |
242 | * | |
243 | * strict_strtoll is similiar to strict_strtoull, but it allows the first | |
244 | * character of a string is '-'. | |
245 | * | |
246 | * It returns 0 if conversion is successful and *res is set to the converted | |
247 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
248 | */ | |
9d85db22 HH |
249 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
250 | { | |
251 | int ret; | |
252 | if (*cp == '-') { | |
253 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); | |
254 | if (!ret) | |
255 | *res = -(*res); | |
256 | } else { | |
257 | ret = strict_strtoull(cp, base, (unsigned long long *)res); | |
258 | } | |
06b2a76d | 259 | |
9d85db22 HH |
260 | return ret; |
261 | } | |
06b2a76d | 262 | EXPORT_SYMBOL(strict_strtoll); |
06b2a76d | 263 | |
cf3b429b JP |
264 | static noinline_for_stack |
265 | int skip_atoi(const char **s) | |
1da177e4 | 266 | { |
7b9186f5 | 267 | int i = 0; |
1da177e4 LT |
268 | |
269 | while (isdigit(**s)) | |
270 | i = i*10 + *((*s)++) - '0'; | |
7b9186f5 | 271 | |
1da177e4 LT |
272 | return i; |
273 | } | |
274 | ||
4277eedd DV |
275 | /* Decimal conversion is by far the most typical, and is used |
276 | * for /proc and /sys data. This directly impacts e.g. top performance | |
277 | * with many processes running. We optimize it for speed | |
278 | * using code from | |
279 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
280 | * (with permission from the author, Douglas W. Jones). */ | |
281 | ||
282 | /* Formats correctly any integer in [0,99999]. | |
283 | * Outputs from one to five digits depending on input. | |
284 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
cf3b429b JP |
285 | static noinline_for_stack |
286 | char *put_dec_trunc(char *buf, unsigned q) | |
4277eedd DV |
287 | { |
288 | unsigned d3, d2, d1, d0; | |
289 | d1 = (q>>4) & 0xf; | |
290 | d2 = (q>>8) & 0xf; | |
291 | d3 = (q>>12); | |
292 | ||
293 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
294 | q = (d0 * 0xcd) >> 11; | |
295 | d0 = d0 - 10*q; | |
296 | *buf++ = d0 + '0'; /* least significant digit */ | |
297 | d1 = q + 9*d3 + 5*d2 + d1; | |
298 | if (d1 != 0) { | |
299 | q = (d1 * 0xcd) >> 11; | |
300 | d1 = d1 - 10*q; | |
301 | *buf++ = d1 + '0'; /* next digit */ | |
302 | ||
303 | d2 = q + 2*d2; | |
304 | if ((d2 != 0) || (d3 != 0)) { | |
305 | q = (d2 * 0xd) >> 7; | |
306 | d2 = d2 - 10*q; | |
307 | *buf++ = d2 + '0'; /* next digit */ | |
308 | ||
309 | d3 = q + 4*d3; | |
310 | if (d3 != 0) { | |
311 | q = (d3 * 0xcd) >> 11; | |
312 | d3 = d3 - 10*q; | |
313 | *buf++ = d3 + '0'; /* next digit */ | |
314 | if (q != 0) | |
7b9186f5 | 315 | *buf++ = q + '0'; /* most sign. digit */ |
4277eedd DV |
316 | } |
317 | } | |
318 | } | |
7b9186f5 | 319 | |
4277eedd DV |
320 | return buf; |
321 | } | |
322 | /* Same with if's removed. Always emits five digits */ | |
cf3b429b JP |
323 | static noinline_for_stack |
324 | char *put_dec_full(char *buf, unsigned q) | |
4277eedd DV |
325 | { |
326 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
327 | /* but anyway, gcc produces better code with full-sized ints */ | |
328 | unsigned d3, d2, d1, d0; | |
329 | d1 = (q>>4) & 0xf; | |
330 | d2 = (q>>8) & 0xf; | |
331 | d3 = (q>>12); | |
332 | ||
7b9186f5 AGR |
333 | /* |
334 | * Possible ways to approx. divide by 10 | |
335 | * gcc -O2 replaces multiply with shifts and adds | |
336 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
337 | * (x * 0x67) >> 10: 1100111 | |
338 | * (x * 0x34) >> 9: 110100 - same | |
339 | * (x * 0x1a) >> 8: 11010 - same | |
340 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
341 | */ | |
4277eedd DV |
342 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
343 | q = (d0 * 0xcd) >> 11; | |
344 | d0 = d0 - 10*q; | |
345 | *buf++ = d0 + '0'; | |
346 | d1 = q + 9*d3 + 5*d2 + d1; | |
347 | q = (d1 * 0xcd) >> 11; | |
348 | d1 = d1 - 10*q; | |
349 | *buf++ = d1 + '0'; | |
350 | ||
351 | d2 = q + 2*d2; | |
352 | q = (d2 * 0xd) >> 7; | |
353 | d2 = d2 - 10*q; | |
354 | *buf++ = d2 + '0'; | |
355 | ||
356 | d3 = q + 4*d3; | |
357 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
358 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
359 | d3 = d3 - 10*q; | |
360 | *buf++ = d3 + '0'; | |
361 | *buf++ = q + '0'; | |
7b9186f5 | 362 | |
4277eedd DV |
363 | return buf; |
364 | } | |
365 | /* No inlining helps gcc to use registers better */ | |
cf3b429b JP |
366 | static noinline_for_stack |
367 | char *put_dec(char *buf, unsigned long long num) | |
4277eedd DV |
368 | { |
369 | while (1) { | |
370 | unsigned rem; | |
371 | if (num < 100000) | |
372 | return put_dec_trunc(buf, num); | |
373 | rem = do_div(num, 100000); | |
374 | buf = put_dec_full(buf, rem); | |
375 | } | |
376 | } | |
377 | ||
1da177e4 LT |
378 | #define ZEROPAD 1 /* pad with zero */ |
379 | #define SIGN 2 /* unsigned/signed long */ | |
380 | #define PLUS 4 /* show plus */ | |
381 | #define SPACE 8 /* space if plus */ | |
382 | #define LEFT 16 /* left justified */ | |
b89dc5d6 BH |
383 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
384 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ | |
1da177e4 | 385 | |
fef20d9c FW |
386 | enum format_type { |
387 | FORMAT_TYPE_NONE, /* Just a string part */ | |
ed681a91 | 388 | FORMAT_TYPE_WIDTH, |
fef20d9c FW |
389 | FORMAT_TYPE_PRECISION, |
390 | FORMAT_TYPE_CHAR, | |
391 | FORMAT_TYPE_STR, | |
392 | FORMAT_TYPE_PTR, | |
393 | FORMAT_TYPE_PERCENT_CHAR, | |
394 | FORMAT_TYPE_INVALID, | |
395 | FORMAT_TYPE_LONG_LONG, | |
396 | FORMAT_TYPE_ULONG, | |
397 | FORMAT_TYPE_LONG, | |
a4e94ef0 Z |
398 | FORMAT_TYPE_UBYTE, |
399 | FORMAT_TYPE_BYTE, | |
fef20d9c FW |
400 | FORMAT_TYPE_USHORT, |
401 | FORMAT_TYPE_SHORT, | |
402 | FORMAT_TYPE_UINT, | |
403 | FORMAT_TYPE_INT, | |
404 | FORMAT_TYPE_NRCHARS, | |
405 | FORMAT_TYPE_SIZE_T, | |
406 | FORMAT_TYPE_PTRDIFF | |
407 | }; | |
408 | ||
409 | struct printf_spec { | |
4e310fda | 410 | u8 type; /* format_type enum */ |
ef0658f3 | 411 | u8 flags; /* flags to number() */ |
4e310fda JP |
412 | u8 base; /* number base, 8, 10 or 16 only */ |
413 | u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ | |
414 | s16 field_width; /* width of output field */ | |
415 | s16 precision; /* # of digits/chars */ | |
fef20d9c FW |
416 | }; |
417 | ||
cf3b429b JP |
418 | static noinline_for_stack |
419 | char *number(char *buf, char *end, unsigned long long num, | |
420 | struct printf_spec spec) | |
1da177e4 | 421 | { |
9b706aee DV |
422 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
423 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ | |
424 | ||
425 | char tmp[66]; | |
426 | char sign; | |
427 | char locase; | |
fef20d9c | 428 | int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
1da177e4 LT |
429 | int i; |
430 | ||
9b706aee DV |
431 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
432 | * produces same digits or (maybe lowercased) letters */ | |
fef20d9c FW |
433 | locase = (spec.flags & SMALL); |
434 | if (spec.flags & LEFT) | |
435 | spec.flags &= ~ZEROPAD; | |
1da177e4 | 436 | sign = 0; |
fef20d9c | 437 | if (spec.flags & SIGN) { |
7b9186f5 | 438 | if ((signed long long)num < 0) { |
1da177e4 | 439 | sign = '-'; |
7b9186f5 | 440 | num = -(signed long long)num; |
fef20d9c FW |
441 | spec.field_width--; |
442 | } else if (spec.flags & PLUS) { | |
1da177e4 | 443 | sign = '+'; |
fef20d9c FW |
444 | spec.field_width--; |
445 | } else if (spec.flags & SPACE) { | |
1da177e4 | 446 | sign = ' '; |
fef20d9c | 447 | spec.field_width--; |
1da177e4 LT |
448 | } |
449 | } | |
b39a7340 | 450 | if (need_pfx) { |
fef20d9c FW |
451 | spec.field_width--; |
452 | if (spec.base == 16) | |
453 | spec.field_width--; | |
1da177e4 | 454 | } |
b39a7340 DV |
455 | |
456 | /* generate full string in tmp[], in reverse order */ | |
1da177e4 LT |
457 | i = 0; |
458 | if (num == 0) | |
b39a7340 | 459 | tmp[i++] = '0'; |
4277eedd DV |
460 | /* Generic code, for any base: |
461 | else do { | |
9b706aee | 462 | tmp[i++] = (digits[do_div(num,base)] | locase); |
4277eedd DV |
463 | } while (num != 0); |
464 | */ | |
fef20d9c FW |
465 | else if (spec.base != 10) { /* 8 or 16 */ |
466 | int mask = spec.base - 1; | |
b39a7340 | 467 | int shift = 3; |
7b9186f5 AGR |
468 | |
469 | if (spec.base == 16) | |
470 | shift = 4; | |
b39a7340 | 471 | do { |
9b706aee | 472 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
b39a7340 DV |
473 | num >>= shift; |
474 | } while (num); | |
4277eedd DV |
475 | } else { /* base 10 */ |
476 | i = put_dec(tmp, num) - tmp; | |
477 | } | |
b39a7340 DV |
478 | |
479 | /* printing 100 using %2d gives "100", not "00" */ | |
fef20d9c FW |
480 | if (i > spec.precision) |
481 | spec.precision = i; | |
b39a7340 | 482 | /* leading space padding */ |
fef20d9c FW |
483 | spec.field_width -= spec.precision; |
484 | if (!(spec.flags & (ZEROPAD+LEFT))) { | |
7b9186f5 | 485 | while (--spec.field_width >= 0) { |
f796937a | 486 | if (buf < end) |
1da177e4 LT |
487 | *buf = ' '; |
488 | ++buf; | |
489 | } | |
490 | } | |
b39a7340 | 491 | /* sign */ |
1da177e4 | 492 | if (sign) { |
f796937a | 493 | if (buf < end) |
1da177e4 LT |
494 | *buf = sign; |
495 | ++buf; | |
496 | } | |
b39a7340 DV |
497 | /* "0x" / "0" prefix */ |
498 | if (need_pfx) { | |
499 | if (buf < end) | |
500 | *buf = '0'; | |
501 | ++buf; | |
fef20d9c | 502 | if (spec.base == 16) { |
f796937a | 503 | if (buf < end) |
9b706aee | 504 | *buf = ('X' | locase); |
1da177e4 LT |
505 | ++buf; |
506 | } | |
507 | } | |
b39a7340 | 508 | /* zero or space padding */ |
fef20d9c FW |
509 | if (!(spec.flags & LEFT)) { |
510 | char c = (spec.flags & ZEROPAD) ? '0' : ' '; | |
511 | while (--spec.field_width >= 0) { | |
f796937a | 512 | if (buf < end) |
1da177e4 LT |
513 | *buf = c; |
514 | ++buf; | |
515 | } | |
516 | } | |
b39a7340 | 517 | /* hmm even more zero padding? */ |
fef20d9c | 518 | while (i <= --spec.precision) { |
f796937a | 519 | if (buf < end) |
1da177e4 LT |
520 | *buf = '0'; |
521 | ++buf; | |
522 | } | |
b39a7340 DV |
523 | /* actual digits of result */ |
524 | while (--i >= 0) { | |
f796937a | 525 | if (buf < end) |
1da177e4 LT |
526 | *buf = tmp[i]; |
527 | ++buf; | |
528 | } | |
b39a7340 | 529 | /* trailing space padding */ |
fef20d9c | 530 | while (--spec.field_width >= 0) { |
f796937a | 531 | if (buf < end) |
1da177e4 LT |
532 | *buf = ' '; |
533 | ++buf; | |
534 | } | |
7b9186f5 | 535 | |
1da177e4 LT |
536 | return buf; |
537 | } | |
538 | ||
cf3b429b JP |
539 | static noinline_for_stack |
540 | char *string(char *buf, char *end, const char *s, struct printf_spec spec) | |
0f9bfa56 LT |
541 | { |
542 | int len, i; | |
543 | ||
544 | if ((unsigned long)s < PAGE_SIZE) | |
0f4f81dc | 545 | s = "(null)"; |
0f9bfa56 | 546 | |
fef20d9c | 547 | len = strnlen(s, spec.precision); |
0f9bfa56 | 548 | |
fef20d9c FW |
549 | if (!(spec.flags & LEFT)) { |
550 | while (len < spec.field_width--) { | |
0f9bfa56 LT |
551 | if (buf < end) |
552 | *buf = ' '; | |
553 | ++buf; | |
554 | } | |
555 | } | |
556 | for (i = 0; i < len; ++i) { | |
557 | if (buf < end) | |
558 | *buf = *s; | |
559 | ++buf; ++s; | |
560 | } | |
fef20d9c | 561 | while (len < spec.field_width--) { |
0f9bfa56 LT |
562 | if (buf < end) |
563 | *buf = ' '; | |
564 | ++buf; | |
565 | } | |
7b9186f5 | 566 | |
0f9bfa56 LT |
567 | return buf; |
568 | } | |
569 | ||
cf3b429b JP |
570 | static noinline_for_stack |
571 | char *symbol_string(char *buf, char *end, void *ptr, | |
572 | struct printf_spec spec, char ext) | |
0fe1ef24 LT |
573 | { |
574 | unsigned long value = (unsigned long) ptr; | |
575 | #ifdef CONFIG_KALLSYMS | |
576 | char sym[KSYM_SYMBOL_LEN]; | |
0f77a8d3 NK |
577 | if (ext == 'B') |
578 | sprint_backtrace(sym, value); | |
579 | else if (ext != 'f' && ext != 's') | |
0c8b946e FW |
580 | sprint_symbol(sym, value); |
581 | else | |
582 | kallsyms_lookup(value, NULL, NULL, NULL, sym); | |
7b9186f5 | 583 | |
fef20d9c | 584 | return string(buf, end, sym, spec); |
0fe1ef24 | 585 | #else |
7b9186f5 | 586 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
587 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
588 | spec.base = 16; | |
7b9186f5 | 589 | |
fef20d9c | 590 | return number(buf, end, value, spec); |
0fe1ef24 LT |
591 | #endif |
592 | } | |
593 | ||
cf3b429b JP |
594 | static noinline_for_stack |
595 | char *resource_string(char *buf, char *end, struct resource *res, | |
596 | struct printf_spec spec, const char *fmt) | |
332d2e78 LT |
597 | { |
598 | #ifndef IO_RSRC_PRINTK_SIZE | |
28405372 | 599 | #define IO_RSRC_PRINTK_SIZE 6 |
332d2e78 LT |
600 | #endif |
601 | ||
602 | #ifndef MEM_RSRC_PRINTK_SIZE | |
28405372 | 603 | #define MEM_RSRC_PRINTK_SIZE 10 |
332d2e78 | 604 | #endif |
4da0b66c | 605 | static const struct printf_spec io_spec = { |
fef20d9c | 606 | .base = 16, |
4da0b66c | 607 | .field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c FW |
608 | .precision = -1, |
609 | .flags = SPECIAL | SMALL | ZEROPAD, | |
610 | }; | |
4da0b66c BH |
611 | static const struct printf_spec mem_spec = { |
612 | .base = 16, | |
613 | .field_width = MEM_RSRC_PRINTK_SIZE, | |
614 | .precision = -1, | |
615 | .flags = SPECIAL | SMALL | ZEROPAD, | |
616 | }; | |
0f4050c7 BH |
617 | static const struct printf_spec bus_spec = { |
618 | .base = 16, | |
619 | .field_width = 2, | |
620 | .precision = -1, | |
621 | .flags = SMALL | ZEROPAD, | |
622 | }; | |
4da0b66c | 623 | static const struct printf_spec dec_spec = { |
c91d3376 BH |
624 | .base = 10, |
625 | .precision = -1, | |
626 | .flags = 0, | |
627 | }; | |
4da0b66c | 628 | static const struct printf_spec str_spec = { |
fd95541e BH |
629 | .field_width = -1, |
630 | .precision = 10, | |
631 | .flags = LEFT, | |
632 | }; | |
4da0b66c | 633 | static const struct printf_spec flag_spec = { |
fd95541e BH |
634 | .base = 16, |
635 | .precision = -1, | |
636 | .flags = SPECIAL | SMALL, | |
637 | }; | |
c7dabef8 BH |
638 | |
639 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
640 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
641 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
642 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
9d7cca04 | 643 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
c7dabef8 BH |
644 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
645 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
646 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
647 | ||
332d2e78 | 648 | char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8 | 649 | int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c | 650 | const struct printf_spec *specp; |
332d2e78 LT |
651 | |
652 | *p++ = '['; | |
4da0b66c | 653 | if (res->flags & IORESOURCE_IO) { |
c7dabef8 | 654 | p = string(p, pend, "io ", str_spec); |
4da0b66c BH |
655 | specp = &io_spec; |
656 | } else if (res->flags & IORESOURCE_MEM) { | |
c7dabef8 | 657 | p = string(p, pend, "mem ", str_spec); |
4da0b66c BH |
658 | specp = &mem_spec; |
659 | } else if (res->flags & IORESOURCE_IRQ) { | |
c7dabef8 | 660 | p = string(p, pend, "irq ", str_spec); |
4da0b66c BH |
661 | specp = &dec_spec; |
662 | } else if (res->flags & IORESOURCE_DMA) { | |
c7dabef8 | 663 | p = string(p, pend, "dma ", str_spec); |
4da0b66c | 664 | specp = &dec_spec; |
0f4050c7 BH |
665 | } else if (res->flags & IORESOURCE_BUS) { |
666 | p = string(p, pend, "bus ", str_spec); | |
667 | specp = &bus_spec; | |
4da0b66c | 668 | } else { |
c7dabef8 | 669 | p = string(p, pend, "??? ", str_spec); |
4da0b66c | 670 | specp = &mem_spec; |
c7dabef8 | 671 | decode = 0; |
fd95541e | 672 | } |
4da0b66c | 673 | p = number(p, pend, res->start, *specp); |
c91d3376 BH |
674 | if (res->start != res->end) { |
675 | *p++ = '-'; | |
4da0b66c | 676 | p = number(p, pend, res->end, *specp); |
c91d3376 | 677 | } |
c7dabef8 | 678 | if (decode) { |
fd95541e BH |
679 | if (res->flags & IORESOURCE_MEM_64) |
680 | p = string(p, pend, " 64bit", str_spec); | |
681 | if (res->flags & IORESOURCE_PREFETCH) | |
682 | p = string(p, pend, " pref", str_spec); | |
9d7cca04 BH |
683 | if (res->flags & IORESOURCE_WINDOW) |
684 | p = string(p, pend, " window", str_spec); | |
fd95541e BH |
685 | if (res->flags & IORESOURCE_DISABLED) |
686 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
687 | } else { |
688 | p = string(p, pend, " flags ", str_spec); | |
689 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 690 | } |
332d2e78 | 691 | *p++ = ']'; |
c7dabef8 | 692 | *p = '\0'; |
332d2e78 | 693 | |
fef20d9c | 694 | return string(buf, end, sym, spec); |
332d2e78 LT |
695 | } |
696 | ||
cf3b429b JP |
697 | static noinline_for_stack |
698 | char *mac_address_string(char *buf, char *end, u8 *addr, | |
699 | struct printf_spec spec, const char *fmt) | |
dd45c9cf | 700 | { |
8a27f7c9 | 701 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
702 | char *p = mac_addr; |
703 | int i; | |
bc7259a2 JP |
704 | char separator; |
705 | ||
706 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
707 | separator = '-'; |
708 | } else { | |
bc7259a2 JP |
709 | separator = ':'; |
710 | } | |
dd45c9cf HH |
711 | |
712 | for (i = 0; i < 6; i++) { | |
c8e00060 | 713 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 714 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 715 | *p++ = separator; |
dd45c9cf HH |
716 | } |
717 | *p = '\0'; | |
718 | ||
fef20d9c | 719 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
720 | } |
721 | ||
cf3b429b JP |
722 | static noinline_for_stack |
723 | char *ip4_string(char *p, const u8 *addr, const char *fmt) | |
8a27f7c9 JP |
724 | { |
725 | int i; | |
0159f24e JP |
726 | bool leading_zeros = (fmt[0] == 'i'); |
727 | int index; | |
728 | int step; | |
729 | ||
730 | switch (fmt[2]) { | |
731 | case 'h': | |
732 | #ifdef __BIG_ENDIAN | |
733 | index = 0; | |
734 | step = 1; | |
735 | #else | |
736 | index = 3; | |
737 | step = -1; | |
738 | #endif | |
739 | break; | |
740 | case 'l': | |
741 | index = 3; | |
742 | step = -1; | |
743 | break; | |
744 | case 'n': | |
745 | case 'b': | |
746 | default: | |
747 | index = 0; | |
748 | step = 1; | |
749 | break; | |
750 | } | |
8a27f7c9 JP |
751 | for (i = 0; i < 4; i++) { |
752 | char temp[3]; /* hold each IP quad in reverse order */ | |
0159f24e | 753 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c9 JP |
754 | if (leading_zeros) { |
755 | if (digits < 3) | |
756 | *p++ = '0'; | |
757 | if (digits < 2) | |
758 | *p++ = '0'; | |
759 | } | |
760 | /* reverse the digits in the quad */ | |
761 | while (digits--) | |
762 | *p++ = temp[digits]; | |
763 | if (i < 3) | |
764 | *p++ = '.'; | |
0159f24e | 765 | index += step; |
8a27f7c9 | 766 | } |
8a27f7c9 | 767 | *p = '\0'; |
7b9186f5 | 768 | |
8a27f7c9 JP |
769 | return p; |
770 | } | |
771 | ||
cf3b429b JP |
772 | static noinline_for_stack |
773 | char *ip6_compressed_string(char *p, const char *addr) | |
689afa7d | 774 | { |
7b9186f5 | 775 | int i, j, range; |
8a27f7c9 JP |
776 | unsigned char zerolength[8]; |
777 | int longest = 1; | |
778 | int colonpos = -1; | |
779 | u16 word; | |
7b9186f5 | 780 | u8 hi, lo; |
8a27f7c9 | 781 | bool needcolon = false; |
eb78cd26 JP |
782 | bool useIPv4; |
783 | struct in6_addr in6; | |
784 | ||
785 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
786 | ||
787 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
788 | |
789 | memset(zerolength, 0, sizeof(zerolength)); | |
790 | ||
791 | if (useIPv4) | |
792 | range = 6; | |
793 | else | |
794 | range = 8; | |
795 | ||
796 | /* find position of longest 0 run */ | |
797 | for (i = 0; i < range; i++) { | |
798 | for (j = i; j < range; j++) { | |
eb78cd26 | 799 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
800 | break; |
801 | zerolength[i]++; | |
802 | } | |
803 | } | |
804 | for (i = 0; i < range; i++) { | |
805 | if (zerolength[i] > longest) { | |
806 | longest = zerolength[i]; | |
807 | colonpos = i; | |
808 | } | |
809 | } | |
689afa7d | 810 | |
8a27f7c9 JP |
811 | /* emit address */ |
812 | for (i = 0; i < range; i++) { | |
813 | if (i == colonpos) { | |
814 | if (needcolon || i == 0) | |
815 | *p++ = ':'; | |
816 | *p++ = ':'; | |
817 | needcolon = false; | |
818 | i += longest - 1; | |
819 | continue; | |
820 | } | |
821 | if (needcolon) { | |
822 | *p++ = ':'; | |
823 | needcolon = false; | |
824 | } | |
825 | /* hex u16 without leading 0s */ | |
eb78cd26 | 826 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
827 | hi = word >> 8; |
828 | lo = word & 0xff; | |
829 | if (hi) { | |
830 | if (hi > 0x0f) | |
831 | p = pack_hex_byte(p, hi); | |
832 | else | |
833 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 834 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 835 | } |
b5ff992b | 836 | else if (lo > 0x0f) |
8a27f7c9 JP |
837 | p = pack_hex_byte(p, lo); |
838 | else | |
839 | *p++ = hex_asc_lo(lo); | |
840 | needcolon = true; | |
841 | } | |
842 | ||
843 | if (useIPv4) { | |
844 | if (needcolon) | |
845 | *p++ = ':'; | |
0159f24e | 846 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c9 | 847 | } |
8a27f7c9 | 848 | *p = '\0'; |
7b9186f5 | 849 | |
8a27f7c9 JP |
850 | return p; |
851 | } | |
852 | ||
cf3b429b JP |
853 | static noinline_for_stack |
854 | char *ip6_string(char *p, const char *addr, const char *fmt) | |
8a27f7c9 JP |
855 | { |
856 | int i; | |
7b9186f5 | 857 | |
689afa7d | 858 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
859 | p = pack_hex_byte(p, *addr++); |
860 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 861 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
862 | *p++ = ':'; |
863 | } | |
864 | *p = '\0'; | |
7b9186f5 | 865 | |
8a27f7c9 JP |
866 | return p; |
867 | } | |
868 | ||
cf3b429b JP |
869 | static noinline_for_stack |
870 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
871 | struct printf_spec spec, const char *fmt) | |
8a27f7c9 JP |
872 | { |
873 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
874 | ||
875 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 876 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 877 | else |
eb78cd26 | 878 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 879 | |
fef20d9c | 880 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
881 | } |
882 | ||
cf3b429b JP |
883 | static noinline_for_stack |
884 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, | |
885 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 886 | { |
8a27f7c9 | 887 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 888 | |
0159f24e | 889 | ip4_string(ip4_addr, addr, fmt); |
4aa99606 | 890 | |
fef20d9c | 891 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
892 | } |
893 | ||
cf3b429b JP |
894 | static noinline_for_stack |
895 | char *uuid_string(char *buf, char *end, const u8 *addr, | |
896 | struct printf_spec spec, const char *fmt) | |
9ac6e44e JP |
897 | { |
898 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
899 | char *p = uuid; | |
900 | int i; | |
901 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
902 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
903 | const u8 *index = be; | |
904 | bool uc = false; | |
905 | ||
906 | switch (*(++fmt)) { | |
907 | case 'L': | |
908 | uc = true; /* fall-through */ | |
909 | case 'l': | |
910 | index = le; | |
911 | break; | |
912 | case 'B': | |
913 | uc = true; | |
914 | break; | |
915 | } | |
916 | ||
917 | for (i = 0; i < 16; i++) { | |
918 | p = pack_hex_byte(p, addr[index[i]]); | |
919 | switch (i) { | |
920 | case 3: | |
921 | case 5: | |
922 | case 7: | |
923 | case 9: | |
924 | *p++ = '-'; | |
925 | break; | |
926 | } | |
927 | } | |
928 | ||
929 | *p = 0; | |
930 | ||
931 | if (uc) { | |
932 | p = uuid; | |
933 | do { | |
934 | *p = toupper(*p); | |
935 | } while (*(++p)); | |
936 | } | |
937 | ||
938 | return string(buf, end, uuid, spec); | |
939 | } | |
940 | ||
455cd5ab DR |
941 | int kptr_restrict = 1; |
942 | ||
4d8a743c LT |
943 | /* |
944 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
945 | * by an extra set of alphanumeric characters that are extended format | |
946 | * specifiers. | |
947 | * | |
332d2e78 LT |
948 | * Right now we handle: |
949 | * | |
0c8b946e FW |
950 | * - 'F' For symbolic function descriptor pointers with offset |
951 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
952 | * - 'S' For symbolic direct pointers with offset |
953 | * - 's' For symbolic direct pointers without offset | |
0f77a8d3 | 954 | * - 'B' For backtraced symbolic direct pointers with offset |
c7dabef8 BH |
955 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
956 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
957 | * - 'M' For a 6-byte MAC address, it prints the address in the |
958 | * usual colon-separated hex notation | |
8a27f7c9 | 959 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 960 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 961 | * with a dash-separated hex notation |
8a27f7c9 JP |
962 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
963 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
964 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
965 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
966 | * IPv6 omits the colons (01020304...0f) | |
967 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
0159f24e | 968 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c9 | 969 | * - 'I6c' for IPv6 addresses printed as specified by |
3f472402 | 970 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
9ac6e44e JP |
971 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
972 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
973 | * Options for %pU are: | |
974 | * b big endian lower case hex (default) | |
975 | * B big endian UPPER case hex | |
976 | * l little endian lower case hex | |
977 | * L little endian UPPER case hex | |
978 | * big endian output byte order is: | |
979 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
980 | * little endian output byte order is: | |
981 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
7db6f5fb JP |
982 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
983 | * call vsnprintf(->format, *->va_list). | |
984 | * Implements a "recursive vsnprintf". | |
985 | * Do not use this feature without some mechanism to verify the | |
986 | * correctness of the format string and va_list arguments. | |
455cd5ab | 987 | * - 'K' For a kernel pointer that should be hidden from unprivileged users |
9ac6e44e | 988 | * |
332d2e78 LT |
989 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
990 | * function pointers are really function descriptors, which contain a | |
991 | * pointer to the real address. | |
4d8a743c | 992 | */ |
cf3b429b JP |
993 | static noinline_for_stack |
994 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, | |
995 | struct printf_spec spec) | |
78a8bf69 | 996 | { |
5e057981 JP |
997 | if (!ptr) { |
998 | /* | |
999 | * Print (null) with the same width as a pointer so it makes | |
1000 | * tabular output look nice. | |
1001 | */ | |
1002 | if (spec.field_width == -1) | |
1003 | spec.field_width = 2 * sizeof(void *); | |
fef20d9c | 1004 | return string(buf, end, "(null)", spec); |
5e057981 | 1005 | } |
d97106ab | 1006 | |
0fe1ef24 LT |
1007 | switch (*fmt) { |
1008 | case 'F': | |
0c8b946e | 1009 | case 'f': |
0fe1ef24 LT |
1010 | ptr = dereference_function_descriptor(ptr); |
1011 | /* Fallthrough */ | |
1012 | case 'S': | |
9ac6e44e | 1013 | case 's': |
0f77a8d3 | 1014 | case 'B': |
0c8b946e | 1015 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 1016 | case 'R': |
c7dabef8 | 1017 | case 'r': |
fd95541e | 1018 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
1019 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
1020 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 1021 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
1022 | return mac_address_string(buf, end, ptr, spec, fmt); |
1023 | case 'I': /* Formatted IP supported | |
1024 | * 4: 1.2.3.4 | |
1025 | * 6: 0001:0203:...:0708 | |
1026 | * 6c: 1::708 or 1::1.2.3.4 | |
1027 | */ | |
1028 | case 'i': /* Contiguous: | |
1029 | * 4: 001.002.003.004 | |
1030 | * 6: 000102...0f | |
1031 | */ | |
1032 | switch (fmt[1]) { | |
1033 | case '6': | |
1034 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
1035 | case '4': | |
1036 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
1037 | } | |
fef20d9c | 1038 | break; |
9ac6e44e JP |
1039 | case 'U': |
1040 | return uuid_string(buf, end, ptr, spec, fmt); | |
7db6f5fb JP |
1041 | case 'V': |
1042 | return buf + vsnprintf(buf, end - buf, | |
1043 | ((struct va_format *)ptr)->fmt, | |
1044 | *(((struct va_format *)ptr)->va)); | |
455cd5ab DR |
1045 | case 'K': |
1046 | /* | |
1047 | * %pK cannot be used in IRQ context because its test | |
1048 | * for CAP_SYSLOG would be meaningless. | |
1049 | */ | |
1050 | if (in_irq() || in_serving_softirq() || in_nmi()) { | |
1051 | if (spec.field_width == -1) | |
1052 | spec.field_width = 2 * sizeof(void *); | |
1053 | return string(buf, end, "pK-error", spec); | |
1054 | } else if ((kptr_restrict == 0) || | |
1055 | (kptr_restrict == 1 && | |
1056 | has_capability_noaudit(current, CAP_SYSLOG))) | |
1057 | break; | |
1058 | ||
1059 | if (spec.field_width == -1) { | |
1060 | spec.field_width = 2 * sizeof(void *); | |
1061 | spec.flags |= ZEROPAD; | |
1062 | } | |
1063 | return number(buf, end, 0, spec); | |
fef20d9c FW |
1064 | } |
1065 | spec.flags |= SMALL; | |
1066 | if (spec.field_width == -1) { | |
5e057981 | 1067 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
1068 | spec.flags |= ZEROPAD; |
1069 | } | |
1070 | spec.base = 16; | |
1071 | ||
1072 | return number(buf, end, (unsigned long) ptr, spec); | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Helper function to decode printf style format. | |
1077 | * Each call decode a token from the format and return the | |
1078 | * number of characters read (or likely the delta where it wants | |
1079 | * to go on the next call). | |
1080 | * The decoded token is returned through the parameters | |
1081 | * | |
1082 | * 'h', 'l', or 'L' for integer fields | |
1083 | * 'z' support added 23/7/1999 S.H. | |
1084 | * 'z' changed to 'Z' --davidm 1/25/99 | |
1085 | * 't' added for ptrdiff_t | |
1086 | * | |
1087 | * @fmt: the format string | |
1088 | * @type of the token returned | |
1089 | * @flags: various flags such as +, -, # tokens.. | |
1090 | * @field_width: overwritten width | |
1091 | * @base: base of the number (octal, hex, ...) | |
1092 | * @precision: precision of a number | |
1093 | * @qualifier: qualifier of a number (long, size_t, ...) | |
1094 | */ | |
cf3b429b JP |
1095 | static noinline_for_stack |
1096 | int format_decode(const char *fmt, struct printf_spec *spec) | |
fef20d9c FW |
1097 | { |
1098 | const char *start = fmt; | |
fef20d9c FW |
1099 | |
1100 | /* we finished early by reading the field width */ | |
ed681a91 | 1101 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
1102 | if (spec->field_width < 0) { |
1103 | spec->field_width = -spec->field_width; | |
1104 | spec->flags |= LEFT; | |
1105 | } | |
1106 | spec->type = FORMAT_TYPE_NONE; | |
1107 | goto precision; | |
1108 | } | |
1109 | ||
1110 | /* we finished early by reading the precision */ | |
1111 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
1112 | if (spec->precision < 0) | |
1113 | spec->precision = 0; | |
1114 | ||
1115 | spec->type = FORMAT_TYPE_NONE; | |
1116 | goto qualifier; | |
1117 | } | |
1118 | ||
1119 | /* By default */ | |
1120 | spec->type = FORMAT_TYPE_NONE; | |
1121 | ||
1122 | for (; *fmt ; ++fmt) { | |
1123 | if (*fmt == '%') | |
1124 | break; | |
1125 | } | |
1126 | ||
1127 | /* Return the current non-format string */ | |
1128 | if (fmt != start || !*fmt) | |
1129 | return fmt - start; | |
1130 | ||
1131 | /* Process flags */ | |
1132 | spec->flags = 0; | |
1133 | ||
1134 | while (1) { /* this also skips first '%' */ | |
1135 | bool found = true; | |
1136 | ||
1137 | ++fmt; | |
1138 | ||
1139 | switch (*fmt) { | |
1140 | case '-': spec->flags |= LEFT; break; | |
1141 | case '+': spec->flags |= PLUS; break; | |
1142 | case ' ': spec->flags |= SPACE; break; | |
1143 | case '#': spec->flags |= SPECIAL; break; | |
1144 | case '0': spec->flags |= ZEROPAD; break; | |
1145 | default: found = false; | |
1146 | } | |
1147 | ||
1148 | if (!found) | |
1149 | break; | |
1150 | } | |
1151 | ||
1152 | /* get field width */ | |
1153 | spec->field_width = -1; | |
1154 | ||
1155 | if (isdigit(*fmt)) | |
1156 | spec->field_width = skip_atoi(&fmt); | |
1157 | else if (*fmt == '*') { | |
1158 | /* it's the next argument */ | |
ed681a91 | 1159 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1160 | return ++fmt - start; |
1161 | } | |
1162 | ||
1163 | precision: | |
1164 | /* get the precision */ | |
1165 | spec->precision = -1; | |
1166 | if (*fmt == '.') { | |
1167 | ++fmt; | |
1168 | if (isdigit(*fmt)) { | |
1169 | spec->precision = skip_atoi(&fmt); | |
1170 | if (spec->precision < 0) | |
1171 | spec->precision = 0; | |
1172 | } else if (*fmt == '*') { | |
1173 | /* it's the next argument */ | |
adf26f84 | 1174 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1175 | return ++fmt - start; |
1176 | } | |
1177 | } | |
1178 | ||
1179 | qualifier: | |
1180 | /* get the conversion qualifier */ | |
1181 | spec->qualifier = -1; | |
08562cb2 AGR |
1182 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1183 | TOLOWER(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1184 | spec->qualifier = *fmt++; |
1185 | if (unlikely(spec->qualifier == *fmt)) { | |
1186 | if (spec->qualifier == 'l') { | |
1187 | spec->qualifier = 'L'; | |
1188 | ++fmt; | |
1189 | } else if (spec->qualifier == 'h') { | |
1190 | spec->qualifier = 'H'; | |
1191 | ++fmt; | |
1192 | } | |
fef20d9c FW |
1193 | } |
1194 | } | |
1195 | ||
1196 | /* default base */ | |
1197 | spec->base = 10; | |
1198 | switch (*fmt) { | |
1199 | case 'c': | |
1200 | spec->type = FORMAT_TYPE_CHAR; | |
1201 | return ++fmt - start; | |
1202 | ||
1203 | case 's': | |
1204 | spec->type = FORMAT_TYPE_STR; | |
1205 | return ++fmt - start; | |
1206 | ||
1207 | case 'p': | |
1208 | spec->type = FORMAT_TYPE_PTR; | |
1209 | return fmt - start; | |
1210 | /* skip alnum */ | |
1211 | ||
1212 | case 'n': | |
1213 | spec->type = FORMAT_TYPE_NRCHARS; | |
1214 | return ++fmt - start; | |
1215 | ||
1216 | case '%': | |
1217 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1218 | return ++fmt - start; | |
1219 | ||
1220 | /* integer number formats - set up the flags and "break" */ | |
1221 | case 'o': | |
1222 | spec->base = 8; | |
1223 | break; | |
1224 | ||
1225 | case 'x': | |
1226 | spec->flags |= SMALL; | |
1227 | ||
1228 | case 'X': | |
1229 | spec->base = 16; | |
1230 | break; | |
1231 | ||
1232 | case 'd': | |
1233 | case 'i': | |
39e874f8 | 1234 | spec->flags |= SIGN; |
fef20d9c | 1235 | case 'u': |
4aa99606 | 1236 | break; |
fef20d9c FW |
1237 | |
1238 | default: | |
1239 | spec->type = FORMAT_TYPE_INVALID; | |
1240 | return fmt - start; | |
0fe1ef24 | 1241 | } |
fef20d9c FW |
1242 | |
1243 | if (spec->qualifier == 'L') | |
1244 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1245 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1246 | if (spec->flags & SIGN) |
fef20d9c FW |
1247 | spec->type = FORMAT_TYPE_LONG; |
1248 | else | |
1249 | spec->type = FORMAT_TYPE_ULONG; | |
08562cb2 | 1250 | } else if (TOLOWER(spec->qualifier) == 'z') { |
fef20d9c FW |
1251 | spec->type = FORMAT_TYPE_SIZE_T; |
1252 | } else if (spec->qualifier == 't') { | |
1253 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1254 | } else if (spec->qualifier == 'H') { |
1255 | if (spec->flags & SIGN) | |
1256 | spec->type = FORMAT_TYPE_BYTE; | |
1257 | else | |
1258 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1259 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1260 | if (spec->flags & SIGN) |
fef20d9c FW |
1261 | spec->type = FORMAT_TYPE_SHORT; |
1262 | else | |
1263 | spec->type = FORMAT_TYPE_USHORT; | |
1264 | } else { | |
39e874f8 | 1265 | if (spec->flags & SIGN) |
fef20d9c FW |
1266 | spec->type = FORMAT_TYPE_INT; |
1267 | else | |
1268 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1269 | } |
fef20d9c FW |
1270 | |
1271 | return ++fmt - start; | |
78a8bf69 LT |
1272 | } |
1273 | ||
1da177e4 LT |
1274 | /** |
1275 | * vsnprintf - Format a string and place it in a buffer | |
1276 | * @buf: The buffer to place the result into | |
1277 | * @size: The size of the buffer, including the trailing null space | |
1278 | * @fmt: The format string to use | |
1279 | * @args: Arguments for the format string | |
1280 | * | |
20036fdc | 1281 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1282 | * %pS output the name of a text symbol with offset |
1283 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1284 | * %pF output the name of a function pointer with its offset |
1285 | * %pf output the name of a function pointer without its offset | |
0f77a8d3 | 1286 | * %pB output the name of a backtrace symbol with its offset |
8a79503a UKK |
1287 | * %pR output the address range in a struct resource with decoded flags |
1288 | * %pr output the address range in a struct resource with raw flags | |
1289 | * %pM output a 6-byte MAC address with colons | |
1290 | * %pm output a 6-byte MAC address without colons | |
1291 | * %pI4 print an IPv4 address without leading zeros | |
1292 | * %pi4 print an IPv4 address with leading zeros | |
1293 | * %pI6 print an IPv6 address with colons | |
1294 | * %pi6 print an IPv6 address without colons | |
1295 | * %pI6c print an IPv6 address as specified by | |
3f472402 | 1296 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
8a79503a UKK |
1297 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
1298 | * case. | |
0efb4d20 | 1299 | * %n is ignored |
20036fdc | 1300 | * |
1da177e4 LT |
1301 | * The return value is the number of characters which would |
1302 | * be generated for the given input, excluding the trailing | |
1303 | * '\0', as per ISO C99. If you want to have the exact | |
1304 | * number of characters written into @buf as return value | |
72fd4a35 | 1305 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1306 | * return is greater than or equal to @size, the resulting |
1307 | * string is truncated. | |
1308 | * | |
1309 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1310 | * You probably want snprintf() instead. |
1da177e4 LT |
1311 | */ |
1312 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1313 | { | |
1da177e4 | 1314 | unsigned long long num; |
d4be151b | 1315 | char *str, *end; |
fef20d9c | 1316 | struct printf_spec spec = {0}; |
1da177e4 | 1317 | |
f796937a JF |
1318 | /* Reject out-of-range values early. Large positive sizes are |
1319 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1320 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1321 | return 0; |
1da177e4 LT |
1322 | |
1323 | str = buf; | |
f796937a | 1324 | end = buf + size; |
1da177e4 | 1325 | |
f796937a JF |
1326 | /* Make sure end is always >= buf */ |
1327 | if (end < buf) { | |
1328 | end = ((void *)-1); | |
1329 | size = end - buf; | |
1da177e4 LT |
1330 | } |
1331 | ||
fef20d9c FW |
1332 | while (*fmt) { |
1333 | const char *old_fmt = fmt; | |
d4be151b | 1334 | int read = format_decode(fmt, &spec); |
1da177e4 | 1335 | |
fef20d9c | 1336 | fmt += read; |
1da177e4 | 1337 | |
fef20d9c FW |
1338 | switch (spec.type) { |
1339 | case FORMAT_TYPE_NONE: { | |
1340 | int copy = read; | |
1341 | if (str < end) { | |
1342 | if (copy > end - str) | |
1343 | copy = end - str; | |
1344 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1345 | } |
fef20d9c FW |
1346 | str += read; |
1347 | break; | |
1da177e4 LT |
1348 | } |
1349 | ||
ed681a91 | 1350 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1351 | spec.field_width = va_arg(args, int); |
1352 | break; | |
1da177e4 | 1353 | |
fef20d9c FW |
1354 | case FORMAT_TYPE_PRECISION: |
1355 | spec.precision = va_arg(args, int); | |
1356 | break; | |
1da177e4 | 1357 | |
d4be151b AGR |
1358 | case FORMAT_TYPE_CHAR: { |
1359 | char c; | |
1360 | ||
fef20d9c FW |
1361 | if (!(spec.flags & LEFT)) { |
1362 | while (--spec.field_width > 0) { | |
f796937a | 1363 | if (str < end) |
1da177e4 LT |
1364 | *str = ' '; |
1365 | ++str; | |
1da177e4 | 1366 | |
fef20d9c FW |
1367 | } |
1368 | } | |
1369 | c = (unsigned char) va_arg(args, int); | |
1370 | if (str < end) | |
1371 | *str = c; | |
1372 | ++str; | |
1373 | while (--spec.field_width > 0) { | |
f796937a | 1374 | if (str < end) |
fef20d9c | 1375 | *str = ' '; |
1da177e4 | 1376 | ++str; |
fef20d9c FW |
1377 | } |
1378 | break; | |
d4be151b | 1379 | } |
1da177e4 | 1380 | |
fef20d9c FW |
1381 | case FORMAT_TYPE_STR: |
1382 | str = string(str, end, va_arg(args, char *), spec); | |
1383 | break; | |
1da177e4 | 1384 | |
fef20d9c FW |
1385 | case FORMAT_TYPE_PTR: |
1386 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1387 | spec); | |
1388 | while (isalnum(*fmt)) | |
1389 | fmt++; | |
1390 | break; | |
1da177e4 | 1391 | |
fef20d9c FW |
1392 | case FORMAT_TYPE_PERCENT_CHAR: |
1393 | if (str < end) | |
1394 | *str = '%'; | |
1395 | ++str; | |
1396 | break; | |
1da177e4 | 1397 | |
fef20d9c FW |
1398 | case FORMAT_TYPE_INVALID: |
1399 | if (str < end) | |
1400 | *str = '%'; | |
1401 | ++str; | |
fef20d9c FW |
1402 | break; |
1403 | ||
1404 | case FORMAT_TYPE_NRCHARS: { | |
ef0658f3 | 1405 | u8 qualifier = spec.qualifier; |
fef20d9c FW |
1406 | |
1407 | if (qualifier == 'l') { | |
1408 | long *ip = va_arg(args, long *); | |
1409 | *ip = (str - buf); | |
08562cb2 | 1410 | } else if (TOLOWER(qualifier) == 'z') { |
fef20d9c FW |
1411 | size_t *ip = va_arg(args, size_t *); |
1412 | *ip = (str - buf); | |
1413 | } else { | |
1414 | int *ip = va_arg(args, int *); | |
1415 | *ip = (str - buf); | |
1416 | } | |
1417 | break; | |
1da177e4 | 1418 | } |
fef20d9c FW |
1419 | |
1420 | default: | |
1421 | switch (spec.type) { | |
1422 | case FORMAT_TYPE_LONG_LONG: | |
1423 | num = va_arg(args, long long); | |
1424 | break; | |
1425 | case FORMAT_TYPE_ULONG: | |
1426 | num = va_arg(args, unsigned long); | |
1427 | break; | |
1428 | case FORMAT_TYPE_LONG: | |
1429 | num = va_arg(args, long); | |
1430 | break; | |
1431 | case FORMAT_TYPE_SIZE_T: | |
1432 | num = va_arg(args, size_t); | |
1433 | break; | |
1434 | case FORMAT_TYPE_PTRDIFF: | |
1435 | num = va_arg(args, ptrdiff_t); | |
1436 | break; | |
a4e94ef0 Z |
1437 | case FORMAT_TYPE_UBYTE: |
1438 | num = (unsigned char) va_arg(args, int); | |
1439 | break; | |
1440 | case FORMAT_TYPE_BYTE: | |
1441 | num = (signed char) va_arg(args, int); | |
1442 | break; | |
fef20d9c FW |
1443 | case FORMAT_TYPE_USHORT: |
1444 | num = (unsigned short) va_arg(args, int); | |
1445 | break; | |
1446 | case FORMAT_TYPE_SHORT: | |
1447 | num = (short) va_arg(args, int); | |
1448 | break; | |
39e874f8 FW |
1449 | case FORMAT_TYPE_INT: |
1450 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1451 | break; |
1452 | default: | |
1453 | num = va_arg(args, unsigned int); | |
1454 | } | |
1455 | ||
1456 | str = number(str, end, num, spec); | |
1da177e4 | 1457 | } |
1da177e4 | 1458 | } |
fef20d9c | 1459 | |
f796937a JF |
1460 | if (size > 0) { |
1461 | if (str < end) | |
1462 | *str = '\0'; | |
1463 | else | |
0a6047ee | 1464 | end[-1] = '\0'; |
f796937a | 1465 | } |
fef20d9c | 1466 | |
f796937a | 1467 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1468 | return str-buf; |
fef20d9c | 1469 | |
1da177e4 | 1470 | } |
1da177e4 LT |
1471 | EXPORT_SYMBOL(vsnprintf); |
1472 | ||
1473 | /** | |
1474 | * vscnprintf - Format a string and place it in a buffer | |
1475 | * @buf: The buffer to place the result into | |
1476 | * @size: The size of the buffer, including the trailing null space | |
1477 | * @fmt: The format string to use | |
1478 | * @args: Arguments for the format string | |
1479 | * | |
1480 | * The return value is the number of characters which have been written into | |
b921c69f | 1481 | * the @buf not including the trailing '\0'. If @size is == 0 the function |
1da177e4 LT |
1482 | * returns 0. |
1483 | * | |
1484 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1485 | * You probably want scnprintf() instead. |
20036fdc AK |
1486 | * |
1487 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1488 | */ |
1489 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1490 | { | |
1491 | int i; | |
1492 | ||
7b9186f5 AGR |
1493 | i = vsnprintf(buf, size, fmt, args); |
1494 | ||
b921c69f AA |
1495 | if (likely(i < size)) |
1496 | return i; | |
1497 | if (size != 0) | |
1498 | return size - 1; | |
1499 | return 0; | |
1da177e4 | 1500 | } |
1da177e4 LT |
1501 | EXPORT_SYMBOL(vscnprintf); |
1502 | ||
1503 | /** | |
1504 | * snprintf - Format a string and place it in a buffer | |
1505 | * @buf: The buffer to place the result into | |
1506 | * @size: The size of the buffer, including the trailing null space | |
1507 | * @fmt: The format string to use | |
1508 | * @...: Arguments for the format string | |
1509 | * | |
1510 | * The return value is the number of characters which would be | |
1511 | * generated for the given input, excluding the trailing null, | |
1512 | * as per ISO C99. If the return is greater than or equal to | |
1513 | * @size, the resulting string is truncated. | |
20036fdc AK |
1514 | * |
1515 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1516 | */ |
7b9186f5 | 1517 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1518 | { |
1519 | va_list args; | |
1520 | int i; | |
1521 | ||
1522 | va_start(args, fmt); | |
7b9186f5 | 1523 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1524 | va_end(args); |
7b9186f5 | 1525 | |
1da177e4 LT |
1526 | return i; |
1527 | } | |
1da177e4 LT |
1528 | EXPORT_SYMBOL(snprintf); |
1529 | ||
1530 | /** | |
1531 | * scnprintf - Format a string and place it in a buffer | |
1532 | * @buf: The buffer to place the result into | |
1533 | * @size: The size of the buffer, including the trailing null space | |
1534 | * @fmt: The format string to use | |
1535 | * @...: Arguments for the format string | |
1536 | * | |
1537 | * The return value is the number of characters written into @buf not including | |
b903c0b8 | 1538 | * the trailing '\0'. If @size is == 0 the function returns 0. |
1da177e4 LT |
1539 | */ |
1540 | ||
7b9186f5 | 1541 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1542 | { |
1543 | va_list args; | |
1544 | int i; | |
1545 | ||
1546 | va_start(args, fmt); | |
b921c69f | 1547 | i = vscnprintf(buf, size, fmt, args); |
1da177e4 | 1548 | va_end(args); |
7b9186f5 | 1549 | |
b921c69f | 1550 | return i; |
1da177e4 LT |
1551 | } |
1552 | EXPORT_SYMBOL(scnprintf); | |
1553 | ||
1554 | /** | |
1555 | * vsprintf - Format a string and place it in a buffer | |
1556 | * @buf: The buffer to place the result into | |
1557 | * @fmt: The format string to use | |
1558 | * @args: Arguments for the format string | |
1559 | * | |
1560 | * The function returns the number of characters written | |
72fd4a35 | 1561 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1562 | * buffer overflows. |
1563 | * | |
1564 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1565 | * You probably want sprintf() instead. |
20036fdc AK |
1566 | * |
1567 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1568 | */ |
1569 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1570 | { | |
1571 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1572 | } | |
1da177e4 LT |
1573 | EXPORT_SYMBOL(vsprintf); |
1574 | ||
1575 | /** | |
1576 | * sprintf - Format a string and place it in a buffer | |
1577 | * @buf: The buffer to place the result into | |
1578 | * @fmt: The format string to use | |
1579 | * @...: Arguments for the format string | |
1580 | * | |
1581 | * The function returns the number of characters written | |
72fd4a35 | 1582 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1583 | * buffer overflows. |
20036fdc AK |
1584 | * |
1585 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1586 | */ |
7b9186f5 | 1587 | int sprintf(char *buf, const char *fmt, ...) |
1da177e4 LT |
1588 | { |
1589 | va_list args; | |
1590 | int i; | |
1591 | ||
1592 | va_start(args, fmt); | |
7b9186f5 | 1593 | i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4 | 1594 | va_end(args); |
7b9186f5 | 1595 | |
1da177e4 LT |
1596 | return i; |
1597 | } | |
1da177e4 LT |
1598 | EXPORT_SYMBOL(sprintf); |
1599 | ||
4370aa4a LJ |
1600 | #ifdef CONFIG_BINARY_PRINTF |
1601 | /* | |
1602 | * bprintf service: | |
1603 | * vbin_printf() - VA arguments to binary data | |
1604 | * bstr_printf() - Binary data to text string | |
1605 | */ | |
1606 | ||
1607 | /** | |
1608 | * vbin_printf - Parse a format string and place args' binary value in a buffer | |
1609 | * @bin_buf: The buffer to place args' binary value | |
1610 | * @size: The size of the buffer(by words(32bits), not characters) | |
1611 | * @fmt: The format string to use | |
1612 | * @args: Arguments for the format string | |
1613 | * | |
1614 | * The format follows C99 vsnprintf, except %n is ignored, and its argument | |
1615 | * is skiped. | |
1616 | * | |
1617 | * The return value is the number of words(32bits) which would be generated for | |
1618 | * the given input. | |
1619 | * | |
1620 | * NOTE: | |
1621 | * If the return value is greater than @size, the resulting bin_buf is NOT | |
1622 | * valid for bstr_printf(). | |
1623 | */ | |
1624 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) | |
1625 | { | |
fef20d9c | 1626 | struct printf_spec spec = {0}; |
4370aa4a | 1627 | char *str, *end; |
4370aa4a LJ |
1628 | |
1629 | str = (char *)bin_buf; | |
1630 | end = (char *)(bin_buf + size); | |
1631 | ||
1632 | #define save_arg(type) \ | |
1633 | do { \ | |
1634 | if (sizeof(type) == 8) { \ | |
1635 | unsigned long long value; \ | |
1636 | str = PTR_ALIGN(str, sizeof(u32)); \ | |
1637 | value = va_arg(args, unsigned long long); \ | |
1638 | if (str + sizeof(type) <= end) { \ | |
1639 | *(u32 *)str = *(u32 *)&value; \ | |
1640 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ | |
1641 | } \ | |
1642 | } else { \ | |
1643 | unsigned long value; \ | |
1644 | str = PTR_ALIGN(str, sizeof(type)); \ | |
1645 | value = va_arg(args, int); \ | |
1646 | if (str + sizeof(type) <= end) \ | |
1647 | *(typeof(type) *)str = (type)value; \ | |
1648 | } \ | |
1649 | str += sizeof(type); \ | |
1650 | } while (0) | |
1651 | ||
fef20d9c | 1652 | while (*fmt) { |
d4be151b | 1653 | int read = format_decode(fmt, &spec); |
4370aa4a | 1654 | |
fef20d9c | 1655 | fmt += read; |
4370aa4a | 1656 | |
fef20d9c FW |
1657 | switch (spec.type) { |
1658 | case FORMAT_TYPE_NONE: | |
d4be151b AGR |
1659 | case FORMAT_TYPE_INVALID: |
1660 | case FORMAT_TYPE_PERCENT_CHAR: | |
fef20d9c FW |
1661 | break; |
1662 | ||
ed681a91 | 1663 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1664 | case FORMAT_TYPE_PRECISION: |
1665 | save_arg(int); | |
1666 | break; | |
1667 | ||
1668 | case FORMAT_TYPE_CHAR: | |
4370aa4a | 1669 | save_arg(char); |
fef20d9c FW |
1670 | break; |
1671 | ||
1672 | case FORMAT_TYPE_STR: { | |
4370aa4a LJ |
1673 | const char *save_str = va_arg(args, char *); |
1674 | size_t len; | |
6c356634 | 1675 | |
4370aa4a LJ |
1676 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
1677 | || (unsigned long)save_str < PAGE_SIZE) | |
0f4f81dc | 1678 | save_str = "(null)"; |
6c356634 AGR |
1679 | len = strlen(save_str) + 1; |
1680 | if (str + len < end) | |
1681 | memcpy(str, save_str, len); | |
1682 | str += len; | |
fef20d9c | 1683 | break; |
4370aa4a | 1684 | } |
fef20d9c FW |
1685 | |
1686 | case FORMAT_TYPE_PTR: | |
4370aa4a LJ |
1687 | save_arg(void *); |
1688 | /* skip all alphanumeric pointer suffixes */ | |
fef20d9c | 1689 | while (isalnum(*fmt)) |
4370aa4a | 1690 | fmt++; |
fef20d9c FW |
1691 | break; |
1692 | ||
fef20d9c | 1693 | case FORMAT_TYPE_NRCHARS: { |
4370aa4a | 1694 | /* skip %n 's argument */ |
ef0658f3 | 1695 | u8 qualifier = spec.qualifier; |
4370aa4a LJ |
1696 | void *skip_arg; |
1697 | if (qualifier == 'l') | |
1698 | skip_arg = va_arg(args, long *); | |
08562cb2 | 1699 | else if (TOLOWER(qualifier) == 'z') |
4370aa4a LJ |
1700 | skip_arg = va_arg(args, size_t *); |
1701 | else | |
1702 | skip_arg = va_arg(args, int *); | |
fef20d9c | 1703 | break; |
4370aa4a | 1704 | } |
fef20d9c FW |
1705 | |
1706 | default: | |
1707 | switch (spec.type) { | |
1708 | ||
1709 | case FORMAT_TYPE_LONG_LONG: | |
4370aa4a | 1710 | save_arg(long long); |
fef20d9c FW |
1711 | break; |
1712 | case FORMAT_TYPE_ULONG: | |
1713 | case FORMAT_TYPE_LONG: | |
4370aa4a | 1714 | save_arg(unsigned long); |
fef20d9c FW |
1715 | break; |
1716 | case FORMAT_TYPE_SIZE_T: | |
4370aa4a | 1717 | save_arg(size_t); |
fef20d9c FW |
1718 | break; |
1719 | case FORMAT_TYPE_PTRDIFF: | |
4370aa4a | 1720 | save_arg(ptrdiff_t); |
fef20d9c | 1721 | break; |
a4e94ef0 Z |
1722 | case FORMAT_TYPE_UBYTE: |
1723 | case FORMAT_TYPE_BYTE: | |
1724 | save_arg(char); | |
1725 | break; | |
fef20d9c FW |
1726 | case FORMAT_TYPE_USHORT: |
1727 | case FORMAT_TYPE_SHORT: | |
4370aa4a | 1728 | save_arg(short); |
fef20d9c FW |
1729 | break; |
1730 | default: | |
4370aa4a | 1731 | save_arg(int); |
fef20d9c | 1732 | } |
4370aa4a LJ |
1733 | } |
1734 | } | |
fef20d9c | 1735 | |
7b9186f5 | 1736 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c | 1737 | #undef save_arg |
4370aa4a LJ |
1738 | } |
1739 | EXPORT_SYMBOL_GPL(vbin_printf); | |
1740 | ||
1741 | /** | |
1742 | * bstr_printf - Format a string from binary arguments and place it in a buffer | |
1743 | * @buf: The buffer to place the result into | |
1744 | * @size: The size of the buffer, including the trailing null space | |
1745 | * @fmt: The format string to use | |
1746 | * @bin_buf: Binary arguments for the format string | |
1747 | * | |
1748 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets | |
1749 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is | |
1750 | * a binary buffer that generated by vbin_printf. | |
1751 | * | |
1752 | * The format follows C99 vsnprintf, but has some extensions: | |
0efb4d20 | 1753 | * see vsnprintf comment for details. |
4370aa4a LJ |
1754 | * |
1755 | * The return value is the number of characters which would | |
1756 | * be generated for the given input, excluding the trailing | |
1757 | * '\0', as per ISO C99. If you want to have the exact | |
1758 | * number of characters written into @buf as return value | |
1759 | * (not including the trailing '\0'), use vscnprintf(). If the | |
1760 | * return is greater than or equal to @size, the resulting | |
1761 | * string is truncated. | |
1762 | */ | |
1763 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) | |
1764 | { | |
fef20d9c | 1765 | struct printf_spec spec = {0}; |
d4be151b AGR |
1766 | char *str, *end; |
1767 | const char *args = (const char *)bin_buf; | |
4370aa4a | 1768 | |
2f30b1f9 | 1769 | if (WARN_ON_ONCE((int) size < 0)) |
4370aa4a | 1770 | return 0; |
4370aa4a LJ |
1771 | |
1772 | str = buf; | |
1773 | end = buf + size; | |
1774 | ||
1775 | #define get_arg(type) \ | |
1776 | ({ \ | |
1777 | typeof(type) value; \ | |
1778 | if (sizeof(type) == 8) { \ | |
1779 | args = PTR_ALIGN(args, sizeof(u32)); \ | |
1780 | *(u32 *)&value = *(u32 *)args; \ | |
1781 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ | |
1782 | } else { \ | |
1783 | args = PTR_ALIGN(args, sizeof(type)); \ | |
1784 | value = *(typeof(type) *)args; \ | |
1785 | } \ | |
1786 | args += sizeof(type); \ | |
1787 | value; \ | |
1788 | }) | |
1789 | ||
1790 | /* Make sure end is always >= buf */ | |
1791 | if (end < buf) { | |
1792 | end = ((void *)-1); | |
1793 | size = end - buf; | |
1794 | } | |
1795 | ||
fef20d9c | 1796 | while (*fmt) { |
fef20d9c | 1797 | const char *old_fmt = fmt; |
d4be151b | 1798 | int read = format_decode(fmt, &spec); |
4370aa4a | 1799 | |
fef20d9c | 1800 | fmt += read; |
4370aa4a | 1801 | |
fef20d9c FW |
1802 | switch (spec.type) { |
1803 | case FORMAT_TYPE_NONE: { | |
1804 | int copy = read; | |
1805 | if (str < end) { | |
1806 | if (copy > end - str) | |
1807 | copy = end - str; | |
1808 | memcpy(str, old_fmt, copy); | |
4370aa4a | 1809 | } |
fef20d9c FW |
1810 | str += read; |
1811 | break; | |
4370aa4a LJ |
1812 | } |
1813 | ||
ed681a91 | 1814 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1815 | spec.field_width = get_arg(int); |
1816 | break; | |
4370aa4a | 1817 | |
fef20d9c FW |
1818 | case FORMAT_TYPE_PRECISION: |
1819 | spec.precision = get_arg(int); | |
1820 | break; | |
4370aa4a | 1821 | |
d4be151b AGR |
1822 | case FORMAT_TYPE_CHAR: { |
1823 | char c; | |
1824 | ||
fef20d9c FW |
1825 | if (!(spec.flags & LEFT)) { |
1826 | while (--spec.field_width > 0) { | |
4370aa4a LJ |
1827 | if (str < end) |
1828 | *str = ' '; | |
1829 | ++str; | |
1830 | } | |
1831 | } | |
1832 | c = (unsigned char) get_arg(char); | |
1833 | if (str < end) | |
1834 | *str = c; | |
1835 | ++str; | |
fef20d9c | 1836 | while (--spec.field_width > 0) { |
4370aa4a LJ |
1837 | if (str < end) |
1838 | *str = ' '; | |
1839 | ++str; | |
1840 | } | |
fef20d9c | 1841 | break; |
d4be151b | 1842 | } |
4370aa4a | 1843 | |
fef20d9c | 1844 | case FORMAT_TYPE_STR: { |
4370aa4a | 1845 | const char *str_arg = args; |
d4be151b | 1846 | args += strlen(str_arg) + 1; |
fef20d9c FW |
1847 | str = string(str, end, (char *)str_arg, spec); |
1848 | break; | |
4370aa4a LJ |
1849 | } |
1850 | ||
fef20d9c FW |
1851 | case FORMAT_TYPE_PTR: |
1852 | str = pointer(fmt+1, str, end, get_arg(void *), spec); | |
1853 | while (isalnum(*fmt)) | |
4370aa4a | 1854 | fmt++; |
fef20d9c | 1855 | break; |
4370aa4a | 1856 | |
fef20d9c | 1857 | case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c | 1858 | case FORMAT_TYPE_INVALID: |
4370aa4a LJ |
1859 | if (str < end) |
1860 | *str = '%'; | |
1861 | ++str; | |
fef20d9c FW |
1862 | break; |
1863 | ||
1864 | case FORMAT_TYPE_NRCHARS: | |
1865 | /* skip */ | |
1866 | break; | |
1867 | ||
d4be151b AGR |
1868 | default: { |
1869 | unsigned long long num; | |
1870 | ||
fef20d9c FW |
1871 | switch (spec.type) { |
1872 | ||
1873 | case FORMAT_TYPE_LONG_LONG: | |
1874 | num = get_arg(long long); | |
1875 | break; | |
1876 | case FORMAT_TYPE_ULONG: | |
fef20d9c FW |
1877 | case FORMAT_TYPE_LONG: |
1878 | num = get_arg(unsigned long); | |
1879 | break; | |
1880 | case FORMAT_TYPE_SIZE_T: | |
1881 | num = get_arg(size_t); | |
1882 | break; | |
1883 | case FORMAT_TYPE_PTRDIFF: | |
1884 | num = get_arg(ptrdiff_t); | |
1885 | break; | |
a4e94ef0 Z |
1886 | case FORMAT_TYPE_UBYTE: |
1887 | num = get_arg(unsigned char); | |
1888 | break; | |
1889 | case FORMAT_TYPE_BYTE: | |
1890 | num = get_arg(signed char); | |
1891 | break; | |
fef20d9c FW |
1892 | case FORMAT_TYPE_USHORT: |
1893 | num = get_arg(unsigned short); | |
1894 | break; | |
1895 | case FORMAT_TYPE_SHORT: | |
1896 | num = get_arg(short); | |
1897 | break; | |
1898 | case FORMAT_TYPE_UINT: | |
1899 | num = get_arg(unsigned int); | |
1900 | break; | |
1901 | default: | |
1902 | num = get_arg(int); | |
1903 | } | |
1904 | ||
1905 | str = number(str, end, num, spec); | |
d4be151b AGR |
1906 | } /* default: */ |
1907 | } /* switch(spec.type) */ | |
1908 | } /* while(*fmt) */ | |
fef20d9c | 1909 | |
4370aa4a LJ |
1910 | if (size > 0) { |
1911 | if (str < end) | |
1912 | *str = '\0'; | |
1913 | else | |
1914 | end[-1] = '\0'; | |
1915 | } | |
fef20d9c | 1916 | |
4370aa4a LJ |
1917 | #undef get_arg |
1918 | ||
1919 | /* the trailing null byte doesn't count towards the total */ | |
1920 | return str - buf; | |
1921 | } | |
1922 | EXPORT_SYMBOL_GPL(bstr_printf); | |
1923 | ||
1924 | /** | |
1925 | * bprintf - Parse a format string and place args' binary value in a buffer | |
1926 | * @bin_buf: The buffer to place args' binary value | |
1927 | * @size: The size of the buffer(by words(32bits), not characters) | |
1928 | * @fmt: The format string to use | |
1929 | * @...: Arguments for the format string | |
1930 | * | |
1931 | * The function returns the number of words(u32) written | |
1932 | * into @bin_buf. | |
1933 | */ | |
1934 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) | |
1935 | { | |
1936 | va_list args; | |
1937 | int ret; | |
1938 | ||
1939 | va_start(args, fmt); | |
1940 | ret = vbin_printf(bin_buf, size, fmt, args); | |
1941 | va_end(args); | |
7b9186f5 | 1942 | |
4370aa4a LJ |
1943 | return ret; |
1944 | } | |
1945 | EXPORT_SYMBOL_GPL(bprintf); | |
1946 | ||
1947 | #endif /* CONFIG_BINARY_PRINTF */ | |
1948 | ||
1da177e4 LT |
1949 | /** |
1950 | * vsscanf - Unformat a buffer into a list of arguments | |
1951 | * @buf: input buffer | |
1952 | * @fmt: format of buffer | |
1953 | * @args: arguments | |
1954 | */ | |
7b9186f5 | 1955 | int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4 LT |
1956 | { |
1957 | const char *str = buf; | |
1958 | char *next; | |
1959 | char digit; | |
1960 | int num = 0; | |
ef0658f3 JP |
1961 | u8 qualifier; |
1962 | u8 base; | |
1963 | s16 field_width; | |
d4be151b | 1964 | bool is_sign; |
1da177e4 | 1965 | |
7b9186f5 | 1966 | while (*fmt && *str) { |
1da177e4 LT |
1967 | /* skip any white space in format */ |
1968 | /* white space in format matchs any amount of | |
1969 | * white space, including none, in the input. | |
1970 | */ | |
1971 | if (isspace(*fmt)) { | |
e7d2860b AGR |
1972 | fmt = skip_spaces(++fmt); |
1973 | str = skip_spaces(str); | |
1da177e4 LT |
1974 | } |
1975 | ||
1976 | /* anything that is not a conversion must match exactly */ | |
1977 | if (*fmt != '%' && *fmt) { | |
1978 | if (*fmt++ != *str++) | |
1979 | break; | |
1980 | continue; | |
1981 | } | |
1982 | ||
1983 | if (!*fmt) | |
1984 | break; | |
1985 | ++fmt; | |
7b9186f5 | 1986 | |
1da177e4 LT |
1987 | /* skip this conversion. |
1988 | * advance both strings to next white space | |
1989 | */ | |
1990 | if (*fmt == '*') { | |
8fccae2c | 1991 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4 LT |
1992 | fmt++; |
1993 | while (!isspace(*str) && *str) | |
1994 | str++; | |
1995 | continue; | |
1996 | } | |
1997 | ||
1998 | /* get field width */ | |
1999 | field_width = -1; | |
2000 | if (isdigit(*fmt)) | |
2001 | field_width = skip_atoi(&fmt); | |
2002 | ||
2003 | /* get conversion qualifier */ | |
2004 | qualifier = -1; | |
08562cb2 AGR |
2005 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
2006 | TOLOWER(*fmt) == 'z') { | |
1da177e4 LT |
2007 | qualifier = *fmt++; |
2008 | if (unlikely(qualifier == *fmt)) { | |
2009 | if (qualifier == 'h') { | |
2010 | qualifier = 'H'; | |
2011 | fmt++; | |
2012 | } else if (qualifier == 'l') { | |
2013 | qualifier = 'L'; | |
2014 | fmt++; | |
2015 | } | |
2016 | } | |
2017 | } | |
1da177e4 LT |
2018 | |
2019 | if (!*fmt || !*str) | |
2020 | break; | |
2021 | ||
d4be151b AGR |
2022 | base = 10; |
2023 | is_sign = 0; | |
2024 | ||
7b9186f5 | 2025 | switch (*fmt++) { |
1da177e4 LT |
2026 | case 'c': |
2027 | { | |
7b9186f5 | 2028 | char *s = (char *)va_arg(args, char*); |
1da177e4 LT |
2029 | if (field_width == -1) |
2030 | field_width = 1; | |
2031 | do { | |
2032 | *s++ = *str++; | |
2033 | } while (--field_width > 0 && *str); | |
2034 | num++; | |
2035 | } | |
2036 | continue; | |
2037 | case 's': | |
2038 | { | |
7b9186f5 AGR |
2039 | char *s = (char *)va_arg(args, char *); |
2040 | if (field_width == -1) | |
4be929be | 2041 | field_width = SHRT_MAX; |
1da177e4 | 2042 | /* first, skip leading white space in buffer */ |
e7d2860b | 2043 | str = skip_spaces(str); |
1da177e4 LT |
2044 | |
2045 | /* now copy until next white space */ | |
7b9186f5 | 2046 | while (*str && !isspace(*str) && field_width--) |
1da177e4 | 2047 | *s++ = *str++; |
1da177e4 LT |
2048 | *s = '\0'; |
2049 | num++; | |
2050 | } | |
2051 | continue; | |
2052 | case 'n': | |
2053 | /* return number of characters read so far */ | |
2054 | { | |
7b9186f5 | 2055 | int *i = (int *)va_arg(args, int*); |
1da177e4 LT |
2056 | *i = str - buf; |
2057 | } | |
2058 | continue; | |
2059 | case 'o': | |
2060 | base = 8; | |
2061 | break; | |
2062 | case 'x': | |
2063 | case 'X': | |
2064 | base = 16; | |
2065 | break; | |
2066 | case 'i': | |
7b9186f5 | 2067 | base = 0; |
1da177e4 LT |
2068 | case 'd': |
2069 | is_sign = 1; | |
2070 | case 'u': | |
2071 | break; | |
2072 | case '%': | |
2073 | /* looking for '%' in str */ | |
7b9186f5 | 2074 | if (*str++ != '%') |
1da177e4 LT |
2075 | return num; |
2076 | continue; | |
2077 | default: | |
2078 | /* invalid format; stop here */ | |
2079 | return num; | |
2080 | } | |
2081 | ||
2082 | /* have some sort of integer conversion. | |
2083 | * first, skip white space in buffer. | |
2084 | */ | |
e7d2860b | 2085 | str = skip_spaces(str); |
1da177e4 LT |
2086 | |
2087 | digit = *str; | |
2088 | if (is_sign && digit == '-') | |
2089 | digit = *(str + 1); | |
2090 | ||
2091 | if (!digit | |
7b9186f5 AGR |
2092 | || (base == 16 && !isxdigit(digit)) |
2093 | || (base == 10 && !isdigit(digit)) | |
2094 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
2095 | || (base == 0 && !isdigit(digit))) | |
2096 | break; | |
1da177e4 | 2097 | |
7b9186f5 | 2098 | switch (qualifier) { |
1da177e4 LT |
2099 | case 'H': /* that's 'hh' in format */ |
2100 | if (is_sign) { | |
7b9186f5 AGR |
2101 | signed char *s = (signed char *)va_arg(args, signed char *); |
2102 | *s = (signed char)simple_strtol(str, &next, base); | |
1da177e4 | 2103 | } else { |
7b9186f5 AGR |
2104 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
2105 | *s = (unsigned char)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2106 | } |
2107 | break; | |
2108 | case 'h': | |
2109 | if (is_sign) { | |
7b9186f5 AGR |
2110 | short *s = (short *)va_arg(args, short *); |
2111 | *s = (short)simple_strtol(str, &next, base); | |
1da177e4 | 2112 | } else { |
7b9186f5 AGR |
2113 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
2114 | *s = (unsigned short)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2115 | } |
2116 | break; | |
2117 | case 'l': | |
2118 | if (is_sign) { | |
7b9186f5 AGR |
2119 | long *l = (long *)va_arg(args, long *); |
2120 | *l = simple_strtol(str, &next, base); | |
1da177e4 | 2121 | } else { |
7b9186f5 AGR |
2122 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
2123 | *l = simple_strtoul(str, &next, base); | |
1da177e4 LT |
2124 | } |
2125 | break; | |
2126 | case 'L': | |
2127 | if (is_sign) { | |
7b9186f5 AGR |
2128 | long long *l = (long long *)va_arg(args, long long *); |
2129 | *l = simple_strtoll(str, &next, base); | |
1da177e4 | 2130 | } else { |
7b9186f5 AGR |
2131 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
2132 | *l = simple_strtoull(str, &next, base); | |
1da177e4 LT |
2133 | } |
2134 | break; | |
2135 | case 'Z': | |
2136 | case 'z': | |
2137 | { | |
7b9186f5 AGR |
2138 | size_t *s = (size_t *)va_arg(args, size_t *); |
2139 | *s = (size_t)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2140 | } |
2141 | break; | |
2142 | default: | |
2143 | if (is_sign) { | |
7b9186f5 AGR |
2144 | int *i = (int *)va_arg(args, int *); |
2145 | *i = (int)simple_strtol(str, &next, base); | |
1da177e4 | 2146 | } else { |
7b9186f5 AGR |
2147 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
2148 | *i = (unsigned int)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2149 | } |
2150 | break; | |
2151 | } | |
2152 | num++; | |
2153 | ||
2154 | if (!next) | |
2155 | break; | |
2156 | str = next; | |
2157 | } | |
c6b40d16 JB |
2158 | |
2159 | /* | |
2160 | * Now we've come all the way through so either the input string or the | |
2161 | * format ended. In the former case, there can be a %n at the current | |
2162 | * position in the format that needs to be filled. | |
2163 | */ | |
2164 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
2165 | int *p = (int *)va_arg(args, int *); | |
2166 | *p = str - buf; | |
2167 | } | |
2168 | ||
1da177e4 LT |
2169 | return num; |
2170 | } | |
1da177e4 LT |
2171 | EXPORT_SYMBOL(vsscanf); |
2172 | ||
2173 | /** | |
2174 | * sscanf - Unformat a buffer into a list of arguments | |
2175 | * @buf: input buffer | |
2176 | * @fmt: formatting of buffer | |
2177 | * @...: resulting arguments | |
2178 | */ | |
7b9186f5 | 2179 | int sscanf(const char *buf, const char *fmt, ...) |
1da177e4 LT |
2180 | { |
2181 | va_list args; | |
2182 | int i; | |
2183 | ||
7b9186f5 AGR |
2184 | va_start(args, fmt); |
2185 | i = vsscanf(buf, fmt, args); | |
1da177e4 | 2186 | va_end(args); |
7b9186f5 | 2187 | |
1da177e4 LT |
2188 | return i; |
2189 | } | |
1da177e4 | 2190 | EXPORT_SYMBOL(sscanf); |