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 | ||
12 | /* | |
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> |
1da177e4 | 28 | |
4e57b681 | 29 | #include <asm/page.h> /* for PAGE_SIZE */ |
1da177e4 | 30 | #include <asm/div64.h> |
deac93df | 31 | #include <asm/sections.h> /* for dereference_function_descriptor() */ |
1da177e4 | 32 | |
9b706aee DV |
33 | /* Works only for digits and letters, but small and fast */ |
34 | #define TOLOWER(x) ((x) | 0x20) | |
35 | ||
aa46a63e HH |
36 | static unsigned int simple_guess_base(const char *cp) |
37 | { | |
38 | if (cp[0] == '0') { | |
39 | if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) | |
40 | return 16; | |
41 | else | |
42 | return 8; | |
43 | } else { | |
44 | return 10; | |
45 | } | |
46 | } | |
47 | ||
1da177e4 LT |
48 | /** |
49 | * simple_strtoul - convert a string to an unsigned long | |
50 | * @cp: The start of the string | |
51 | * @endp: A pointer to the end of the parsed string will be placed here | |
52 | * @base: The number base to use | |
53 | */ | |
22d27051 | 54 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
1da177e4 | 55 | { |
aa46a63e HH |
56 | unsigned long result = 0; |
57 | ||
58 | if (!base) | |
59 | base = simple_guess_base(cp); | |
60 | ||
61 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') | |
62 | cp += 2; | |
63 | ||
64 | while (isxdigit(*cp)) { | |
65 | unsigned int value; | |
66 | ||
67 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; | |
68 | if (value >= base) | |
69 | break; | |
70 | result = result * base + value; | |
1da177e4 LT |
71 | cp++; |
72 | } | |
aa46a63e | 73 | |
1da177e4 LT |
74 | if (endp) |
75 | *endp = (char *)cp; | |
76 | return result; | |
77 | } | |
1da177e4 LT |
78 | EXPORT_SYMBOL(simple_strtoul); |
79 | ||
80 | /** | |
81 | * simple_strtol - convert a string to a signed long | |
82 | * @cp: The start of the string | |
83 | * @endp: A pointer to the end of the parsed string will be placed here | |
84 | * @base: The number base to use | |
85 | */ | |
22d27051 | 86 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
1da177e4 | 87 | { |
22d27051 HH |
88 | if(*cp == '-') |
89 | return -simple_strtoul(cp + 1, endp, base); | |
90 | return simple_strtoul(cp, endp, base); | |
1da177e4 | 91 | } |
1da177e4 LT |
92 | EXPORT_SYMBOL(simple_strtol); |
93 | ||
94 | /** | |
95 | * simple_strtoull - convert a string to an unsigned long long | |
96 | * @cp: The start of the string | |
97 | * @endp: A pointer to the end of the parsed string will be placed here | |
98 | * @base: The number base to use | |
99 | */ | |
22d27051 | 100 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
1da177e4 | 101 | { |
aa46a63e HH |
102 | unsigned long long result = 0; |
103 | ||
104 | if (!base) | |
105 | base = simple_guess_base(cp); | |
106 | ||
107 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') | |
108 | cp += 2; | |
109 | ||
110 | while (isxdigit(*cp)) { | |
111 | unsigned int value; | |
112 | ||
113 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; | |
114 | if (value >= base) | |
115 | break; | |
116 | result = result * base + value; | |
1da177e4 LT |
117 | cp++; |
118 | } | |
aa46a63e | 119 | |
1da177e4 LT |
120 | if (endp) |
121 | *endp = (char *)cp; | |
122 | return result; | |
123 | } | |
1da177e4 LT |
124 | EXPORT_SYMBOL(simple_strtoull); |
125 | ||
126 | /** | |
127 | * simple_strtoll - convert a string to a signed long long | |
128 | * @cp: The start of the string | |
129 | * @endp: A pointer to the end of the parsed string will be placed here | |
130 | * @base: The number base to use | |
131 | */ | |
22d27051 | 132 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
1da177e4 LT |
133 | { |
134 | if(*cp=='-') | |
22d27051 HH |
135 | return -simple_strtoull(cp + 1, endp, base); |
136 | return simple_strtoull(cp, endp, base); | |
1da177e4 LT |
137 | } |
138 | ||
06b2a76d YY |
139 | /** |
140 | * strict_strtoul - convert a string to an unsigned long strictly | |
141 | * @cp: The string to be converted | |
142 | * @base: The number base to use | |
143 | * @res: The converted result value | |
144 | * | |
145 | * strict_strtoul converts a string to an unsigned long only if the | |
146 | * string is really an unsigned long string, any string containing | |
147 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
148 | * only a newline char at the tail is acceptible because people generally | |
149 | * change a module parameter in the following way: | |
150 | * | |
151 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
152 | * | |
153 | * echo will append a newline to the tail. | |
154 | * | |
155 | * It returns 0 if conversion is successful and *res is set to the converted | |
156 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
157 | * | |
158 | * simple_strtoul just ignores the successive invalid characters and | |
159 | * return the converted value of prefix part of the string. | |
160 | */ | |
9d85db22 HH |
161 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
162 | { | |
163 | char *tail; | |
164 | unsigned long val; | |
165 | size_t len; | |
166 | ||
167 | *res = 0; | |
168 | len = strlen(cp); | |
169 | if (len == 0) | |
170 | return -EINVAL; | |
171 | ||
172 | val = simple_strtoul(cp, &tail, base); | |
173 | if ((*tail == '\0') || | |
174 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
175 | *res = val; | |
176 | return 0; | |
177 | } | |
178 | ||
179 | return -EINVAL; | |
180 | } | |
181 | EXPORT_SYMBOL(strict_strtoul); | |
06b2a76d YY |
182 | |
183 | /** | |
184 | * strict_strtol - convert a string to a long strictly | |
185 | * @cp: The string to be converted | |
186 | * @base: The number base to use | |
187 | * @res: The converted result value | |
188 | * | |
189 | * strict_strtol is similiar to strict_strtoul, but it allows the first | |
190 | * character of a string is '-'. | |
191 | * | |
192 | * It returns 0 if conversion is successful and *res is set to the converted | |
193 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
194 | */ | |
9d85db22 HH |
195 | int strict_strtol(const char *cp, unsigned int base, long *res) |
196 | { | |
197 | int ret; | |
198 | if (*cp == '-') { | |
199 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); | |
200 | if (!ret) | |
201 | *res = -(*res); | |
202 | } else { | |
203 | ret = strict_strtoul(cp, base, (unsigned long *)res); | |
204 | } | |
205 | ||
206 | return ret; | |
207 | } | |
208 | EXPORT_SYMBOL(strict_strtol); | |
06b2a76d YY |
209 | |
210 | /** | |
211 | * strict_strtoull - convert a string to an unsigned long long strictly | |
212 | * @cp: The string to be converted | |
213 | * @base: The number base to use | |
214 | * @res: The converted result value | |
215 | * | |
216 | * strict_strtoull converts a string to an unsigned long long only if the | |
217 | * string is really an unsigned long long string, any string containing | |
218 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
219 | * only a newline char at the tail is acceptible because people generally | |
220 | * change a module parameter in the following way: | |
221 | * | |
222 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
223 | * | |
224 | * echo will append a newline to the tail of the string. | |
225 | * | |
226 | * It returns 0 if conversion is successful and *res is set to the converted | |
227 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
228 | * | |
229 | * simple_strtoull just ignores the successive invalid characters and | |
230 | * return the converted value of prefix part of the string. | |
231 | */ | |
9d85db22 HH |
232 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
233 | { | |
234 | char *tail; | |
235 | unsigned long long val; | |
236 | size_t len; | |
237 | ||
238 | *res = 0; | |
239 | len = strlen(cp); | |
240 | if (len == 0) | |
241 | return -EINVAL; | |
242 | ||
243 | val = simple_strtoull(cp, &tail, base); | |
244 | if ((*tail == '\0') || | |
245 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
246 | *res = val; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | return -EINVAL; | |
251 | } | |
252 | EXPORT_SYMBOL(strict_strtoull); | |
06b2a76d YY |
253 | |
254 | /** | |
255 | * strict_strtoll - convert a string to a long long strictly | |
256 | * @cp: The string to be converted | |
257 | * @base: The number base to use | |
258 | * @res: The converted result value | |
259 | * | |
260 | * strict_strtoll is similiar to strict_strtoull, but it allows the first | |
261 | * character of a string is '-'. | |
262 | * | |
263 | * It returns 0 if conversion is successful and *res is set to the converted | |
264 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
265 | */ | |
9d85db22 HH |
266 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
267 | { | |
268 | int ret; | |
269 | if (*cp == '-') { | |
270 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); | |
271 | if (!ret) | |
272 | *res = -(*res); | |
273 | } else { | |
274 | ret = strict_strtoull(cp, base, (unsigned long long *)res); | |
275 | } | |
06b2a76d | 276 | |
9d85db22 HH |
277 | return ret; |
278 | } | |
06b2a76d | 279 | EXPORT_SYMBOL(strict_strtoll); |
06b2a76d | 280 | |
1da177e4 LT |
281 | static int skip_atoi(const char **s) |
282 | { | |
283 | int i=0; | |
284 | ||
285 | while (isdigit(**s)) | |
286 | i = i*10 + *((*s)++) - '0'; | |
287 | return i; | |
288 | } | |
289 | ||
4277eedd DV |
290 | /* Decimal conversion is by far the most typical, and is used |
291 | * for /proc and /sys data. This directly impacts e.g. top performance | |
292 | * with many processes running. We optimize it for speed | |
293 | * using code from | |
294 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
295 | * (with permission from the author, Douglas W. Jones). */ | |
296 | ||
297 | /* Formats correctly any integer in [0,99999]. | |
298 | * Outputs from one to five digits depending on input. | |
299 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
300 | static char* put_dec_trunc(char *buf, unsigned q) | |
301 | { | |
302 | unsigned d3, d2, d1, d0; | |
303 | d1 = (q>>4) & 0xf; | |
304 | d2 = (q>>8) & 0xf; | |
305 | d3 = (q>>12); | |
306 | ||
307 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
308 | q = (d0 * 0xcd) >> 11; | |
309 | d0 = d0 - 10*q; | |
310 | *buf++ = d0 + '0'; /* least significant digit */ | |
311 | d1 = q + 9*d3 + 5*d2 + d1; | |
312 | if (d1 != 0) { | |
313 | q = (d1 * 0xcd) >> 11; | |
314 | d1 = d1 - 10*q; | |
315 | *buf++ = d1 + '0'; /* next digit */ | |
316 | ||
317 | d2 = q + 2*d2; | |
318 | if ((d2 != 0) || (d3 != 0)) { | |
319 | q = (d2 * 0xd) >> 7; | |
320 | d2 = d2 - 10*q; | |
321 | *buf++ = d2 + '0'; /* next digit */ | |
322 | ||
323 | d3 = q + 4*d3; | |
324 | if (d3 != 0) { | |
325 | q = (d3 * 0xcd) >> 11; | |
326 | d3 = d3 - 10*q; | |
327 | *buf++ = d3 + '0'; /* next digit */ | |
328 | if (q != 0) | |
329 | *buf++ = q + '0'; /* most sign. digit */ | |
330 | } | |
331 | } | |
332 | } | |
333 | return buf; | |
334 | } | |
335 | /* Same with if's removed. Always emits five digits */ | |
336 | static char* put_dec_full(char *buf, unsigned q) | |
337 | { | |
338 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
339 | /* but anyway, gcc produces better code with full-sized ints */ | |
340 | unsigned d3, d2, d1, d0; | |
341 | d1 = (q>>4) & 0xf; | |
342 | d2 = (q>>8) & 0xf; | |
343 | d3 = (q>>12); | |
344 | ||
345 | /* Possible ways to approx. divide by 10 */ | |
346 | /* gcc -O2 replaces multiply with shifts and adds */ | |
347 | // (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
348 | // (x * 0x67) >> 10: 1100111 | |
349 | // (x * 0x34) >> 9: 110100 - same | |
350 | // (x * 0x1a) >> 8: 11010 - same | |
351 | // (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
352 | ||
353 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
354 | q = (d0 * 0xcd) >> 11; | |
355 | d0 = d0 - 10*q; | |
356 | *buf++ = d0 + '0'; | |
357 | d1 = q + 9*d3 + 5*d2 + d1; | |
358 | q = (d1 * 0xcd) >> 11; | |
359 | d1 = d1 - 10*q; | |
360 | *buf++ = d1 + '0'; | |
361 | ||
362 | d2 = q + 2*d2; | |
363 | q = (d2 * 0xd) >> 7; | |
364 | d2 = d2 - 10*q; | |
365 | *buf++ = d2 + '0'; | |
366 | ||
367 | d3 = q + 4*d3; | |
368 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
369 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
370 | d3 = d3 - 10*q; | |
371 | *buf++ = d3 + '0'; | |
372 | *buf++ = q + '0'; | |
373 | return buf; | |
374 | } | |
375 | /* No inlining helps gcc to use registers better */ | |
376 | static noinline char* put_dec(char *buf, unsigned long long num) | |
377 | { | |
378 | while (1) { | |
379 | unsigned rem; | |
380 | if (num < 100000) | |
381 | return put_dec_trunc(buf, num); | |
382 | rem = do_div(num, 100000); | |
383 | buf = put_dec_full(buf, rem); | |
384 | } | |
385 | } | |
386 | ||
1da177e4 LT |
387 | #define ZEROPAD 1 /* pad with zero */ |
388 | #define SIGN 2 /* unsigned/signed long */ | |
389 | #define PLUS 4 /* show plus */ | |
390 | #define SPACE 8 /* space if plus */ | |
391 | #define LEFT 16 /* left justified */ | |
9b706aee DV |
392 | #define SMALL 32 /* Must be 32 == 0x20 */ |
393 | #define SPECIAL 64 /* 0x */ | |
1da177e4 | 394 | |
b39a7340 | 395 | static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type) |
1da177e4 | 396 | { |
9b706aee DV |
397 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
398 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ | |
399 | ||
400 | char tmp[66]; | |
401 | char sign; | |
402 | char locase; | |
b39a7340 | 403 | int need_pfx = ((type & SPECIAL) && base != 10); |
1da177e4 LT |
404 | int i; |
405 | ||
9b706aee DV |
406 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
407 | * produces same digits or (maybe lowercased) letters */ | |
408 | locase = (type & SMALL); | |
1da177e4 LT |
409 | if (type & LEFT) |
410 | type &= ~ZEROPAD; | |
1da177e4 LT |
411 | sign = 0; |
412 | if (type & SIGN) { | |
413 | if ((signed long long) num < 0) { | |
414 | sign = '-'; | |
415 | num = - (signed long long) num; | |
416 | size--; | |
417 | } else if (type & PLUS) { | |
418 | sign = '+'; | |
419 | size--; | |
420 | } else if (type & SPACE) { | |
421 | sign = ' '; | |
422 | size--; | |
423 | } | |
424 | } | |
b39a7340 DV |
425 | if (need_pfx) { |
426 | size--; | |
1da177e4 | 427 | if (base == 16) |
1da177e4 LT |
428 | size--; |
429 | } | |
b39a7340 DV |
430 | |
431 | /* generate full string in tmp[], in reverse order */ | |
1da177e4 LT |
432 | i = 0; |
433 | if (num == 0) | |
b39a7340 | 434 | tmp[i++] = '0'; |
4277eedd DV |
435 | /* Generic code, for any base: |
436 | else do { | |
9b706aee | 437 | tmp[i++] = (digits[do_div(num,base)] | locase); |
4277eedd DV |
438 | } while (num != 0); |
439 | */ | |
b39a7340 DV |
440 | else if (base != 10) { /* 8 or 16 */ |
441 | int mask = base - 1; | |
442 | int shift = 3; | |
443 | if (base == 16) shift = 4; | |
444 | do { | |
9b706aee | 445 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
b39a7340 DV |
446 | num >>= shift; |
447 | } while (num); | |
4277eedd DV |
448 | } else { /* base 10 */ |
449 | i = put_dec(tmp, num) - tmp; | |
450 | } | |
b39a7340 DV |
451 | |
452 | /* printing 100 using %2d gives "100", not "00" */ | |
1da177e4 LT |
453 | if (i > precision) |
454 | precision = i; | |
b39a7340 | 455 | /* leading space padding */ |
1da177e4 | 456 | size -= precision; |
b39a7340 DV |
457 | if (!(type & (ZEROPAD+LEFT))) { |
458 | while(--size >= 0) { | |
f796937a | 459 | if (buf < end) |
1da177e4 LT |
460 | *buf = ' '; |
461 | ++buf; | |
462 | } | |
463 | } | |
b39a7340 | 464 | /* sign */ |
1da177e4 | 465 | if (sign) { |
f796937a | 466 | if (buf < end) |
1da177e4 LT |
467 | *buf = sign; |
468 | ++buf; | |
469 | } | |
b39a7340 DV |
470 | /* "0x" / "0" prefix */ |
471 | if (need_pfx) { | |
472 | if (buf < end) | |
473 | *buf = '0'; | |
474 | ++buf; | |
475 | if (base == 16) { | |
f796937a | 476 | if (buf < end) |
9b706aee | 477 | *buf = ('X' | locase); |
1da177e4 LT |
478 | ++buf; |
479 | } | |
480 | } | |
b39a7340 | 481 | /* zero or space padding */ |
1da177e4 | 482 | if (!(type & LEFT)) { |
b39a7340 DV |
483 | char c = (type & ZEROPAD) ? '0' : ' '; |
484 | while (--size >= 0) { | |
f796937a | 485 | if (buf < end) |
1da177e4 LT |
486 | *buf = c; |
487 | ++buf; | |
488 | } | |
489 | } | |
b39a7340 DV |
490 | /* hmm even more zero padding? */ |
491 | while (i <= --precision) { | |
f796937a | 492 | if (buf < end) |
1da177e4 LT |
493 | *buf = '0'; |
494 | ++buf; | |
495 | } | |
b39a7340 DV |
496 | /* actual digits of result */ |
497 | while (--i >= 0) { | |
f796937a | 498 | if (buf < end) |
1da177e4 LT |
499 | *buf = tmp[i]; |
500 | ++buf; | |
501 | } | |
b39a7340 DV |
502 | /* trailing space padding */ |
503 | while (--size >= 0) { | |
f796937a | 504 | if (buf < end) |
1da177e4 LT |
505 | *buf = ' '; |
506 | ++buf; | |
507 | } | |
508 | return buf; | |
509 | } | |
510 | ||
0f9bfa56 LT |
511 | static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags) |
512 | { | |
513 | int len, i; | |
514 | ||
515 | if ((unsigned long)s < PAGE_SIZE) | |
516 | s = "<NULL>"; | |
517 | ||
518 | len = strnlen(s, precision); | |
519 | ||
520 | if (!(flags & LEFT)) { | |
521 | while (len < field_width--) { | |
522 | if (buf < end) | |
523 | *buf = ' '; | |
524 | ++buf; | |
525 | } | |
526 | } | |
527 | for (i = 0; i < len; ++i) { | |
528 | if (buf < end) | |
529 | *buf = *s; | |
530 | ++buf; ++s; | |
531 | } | |
532 | while (len < field_width--) { | |
533 | if (buf < end) | |
534 | *buf = ' '; | |
535 | ++buf; | |
536 | } | |
537 | return buf; | |
538 | } | |
539 | ||
0fe1ef24 LT |
540 | static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags) |
541 | { | |
542 | unsigned long value = (unsigned long) ptr; | |
543 | #ifdef CONFIG_KALLSYMS | |
544 | char sym[KSYM_SYMBOL_LEN]; | |
545 | sprint_symbol(sym, value); | |
546 | return string(buf, end, sym, field_width, precision, flags); | |
547 | #else | |
548 | field_width = 2*sizeof(void *); | |
549 | flags |= SPECIAL | SMALL | ZEROPAD; | |
550 | return number(buf, end, value, 16, field_width, precision, flags); | |
551 | #endif | |
552 | } | |
553 | ||
332d2e78 LT |
554 | static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags) |
555 | { | |
556 | #ifndef IO_RSRC_PRINTK_SIZE | |
557 | #define IO_RSRC_PRINTK_SIZE 4 | |
558 | #endif | |
559 | ||
560 | #ifndef MEM_RSRC_PRINTK_SIZE | |
561 | #define MEM_RSRC_PRINTK_SIZE 8 | |
562 | #endif | |
563 | ||
564 | /* room for the actual numbers, the two "0x", -, [, ] and the final zero */ | |
565 | char sym[4*sizeof(resource_size_t) + 8]; | |
566 | char *p = sym, *pend = sym + sizeof(sym); | |
567 | int size = -1; | |
568 | ||
569 | if (res->flags & IORESOURCE_IO) | |
570 | size = IO_RSRC_PRINTK_SIZE; | |
571 | else if (res->flags & IORESOURCE_MEM) | |
572 | size = MEM_RSRC_PRINTK_SIZE; | |
573 | ||
574 | *p++ = '['; | |
575 | p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD); | |
576 | *p++ = '-'; | |
577 | p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD); | |
578 | *p++ = ']'; | |
579 | *p = 0; | |
580 | ||
581 | return string(buf, end, sym, field_width, precision, flags); | |
582 | } | |
583 | ||
dd45c9cf HH |
584 | static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
585 | int precision, int flags) | |
586 | { | |
587 | char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */ | |
588 | char *p = mac_addr; | |
589 | int i; | |
590 | ||
591 | for (i = 0; i < 6; i++) { | |
592 | p = pack_hex_byte(p, addr[i]); | |
593 | if (!(flags & SPECIAL) && i != 5) | |
594 | *p++ = ':'; | |
595 | } | |
596 | *p = '\0'; | |
597 | ||
598 | return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL); | |
599 | } | |
600 | ||
689afa7d HH |
601 | static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
602 | int precision, int flags) | |
603 | { | |
604 | char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */ | |
605 | char *p = ip6_addr; | |
606 | int i; | |
607 | ||
608 | for (i = 0; i < 8; i++) { | |
609 | p = pack_hex_byte(p, addr[2 * i]); | |
610 | p = pack_hex_byte(p, addr[2 * i + 1]); | |
611 | if (!(flags & SPECIAL) && i != 7) | |
612 | *p++ = ':'; | |
613 | } | |
614 | *p = '\0'; | |
615 | ||
616 | return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL); | |
617 | } | |
618 | ||
4aa99606 HH |
619 | static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
620 | int precision, int flags) | |
621 | { | |
622 | char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */ | |
b9ac9985 | 623 | char temp[3]; /* hold each IP quad in reverse order */ |
4aa99606 | 624 | char *p = ip4_addr; |
b9ac9985 | 625 | int i, digits; |
4aa99606 HH |
626 | |
627 | for (i = 0; i < 4; i++) { | |
b9ac9985 HH |
628 | digits = put_dec_trunc(temp, addr[i]) - temp; |
629 | /* reverse the digits in the quad */ | |
630 | while (digits--) | |
631 | *p++ = temp[digits]; | |
4aa99606 HH |
632 | if (i != 3) |
633 | *p++ = '.'; | |
634 | } | |
635 | *p = '\0'; | |
636 | ||
637 | return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL); | |
638 | } | |
639 | ||
4d8a743c LT |
640 | /* |
641 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
642 | * by an extra set of alphanumeric characters that are extended format | |
643 | * specifiers. | |
644 | * | |
332d2e78 LT |
645 | * Right now we handle: |
646 | * | |
647 | * - 'F' For symbolic function descriptor pointers | |
648 | * - 'S' For symbolic direct pointers | |
649 | * - 'R' For a struct resource pointer, it prints the range of | |
650 | * addresses (not the name nor the flags) | |
dd45c9cf HH |
651 | * - 'M' For a 6-byte MAC address, it prints the address in the |
652 | * usual colon-separated hex notation | |
4aa99606 HH |
653 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated |
654 | * decimal for v4 and colon separated network-order 16 bit hex for v6) | |
655 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is | |
6b9a1066 | 656 | * currently the same |
0fe1ef24 | 657 | * |
332d2e78 LT |
658 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
659 | * function pointers are really function descriptors, which contain a | |
660 | * pointer to the real address. | |
4d8a743c LT |
661 | */ |
662 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags) | |
78a8bf69 | 663 | { |
0fe1ef24 LT |
664 | switch (*fmt) { |
665 | case 'F': | |
666 | ptr = dereference_function_descriptor(ptr); | |
667 | /* Fallthrough */ | |
668 | case 'S': | |
669 | return symbol_string(buf, end, ptr, field_width, precision, flags); | |
332d2e78 LT |
670 | case 'R': |
671 | return resource_string(buf, end, ptr, field_width, precision, flags); | |
411c41ee HH |
672 | case 'm': |
673 | flags |= SPECIAL; | |
674 | /* Fallthrough */ | |
dd45c9cf HH |
675 | case 'M': |
676 | return mac_address_string(buf, end, ptr, field_width, precision, flags); | |
4aa99606 HH |
677 | case 'i': |
678 | flags |= SPECIAL; | |
679 | /* Fallthrough */ | |
680 | case 'I': | |
681 | if (fmt[1] == '6') | |
682 | return ip6_addr_string(buf, end, ptr, field_width, precision, flags); | |
683 | if (fmt[1] == '4') | |
684 | return ip4_addr_string(buf, end, ptr, field_width, precision, flags); | |
685 | flags &= ~SPECIAL; | |
686 | break; | |
0fe1ef24 | 687 | } |
78a8bf69 LT |
688 | flags |= SMALL; |
689 | if (field_width == -1) { | |
690 | field_width = 2*sizeof(void *); | |
691 | flags |= ZEROPAD; | |
692 | } | |
693 | return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags); | |
694 | } | |
695 | ||
1da177e4 LT |
696 | /** |
697 | * vsnprintf - Format a string and place it in a buffer | |
698 | * @buf: The buffer to place the result into | |
699 | * @size: The size of the buffer, including the trailing null space | |
700 | * @fmt: The format string to use | |
701 | * @args: Arguments for the format string | |
702 | * | |
20036fdc AK |
703 | * This function follows C99 vsnprintf, but has some extensions: |
704 | * %pS output the name of a text symbol | |
705 | * %pF output the name of a function pointer | |
332d2e78 | 706 | * %pR output the address range in a struct resource |
20036fdc | 707 | * |
1da177e4 LT |
708 | * The return value is the number of characters which would |
709 | * be generated for the given input, excluding the trailing | |
710 | * '\0', as per ISO C99. If you want to have the exact | |
711 | * number of characters written into @buf as return value | |
72fd4a35 | 712 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
713 | * return is greater than or equal to @size, the resulting |
714 | * string is truncated. | |
715 | * | |
716 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 717 | * You probably want snprintf() instead. |
1da177e4 LT |
718 | */ |
719 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
720 | { | |
1da177e4 | 721 | unsigned long long num; |
0f9bfa56 | 722 | int base; |
1da177e4 | 723 | char *str, *end, c; |
1da177e4 LT |
724 | |
725 | int flags; /* flags to number() */ | |
726 | ||
727 | int field_width; /* width of output field */ | |
728 | int precision; /* min. # of digits for integers; max | |
729 | number of chars for from string */ | |
730 | int qualifier; /* 'h', 'l', or 'L' for integer fields */ | |
731 | /* 'z' support added 23/7/1999 S.H. */ | |
732 | /* 'z' changed to 'Z' --davidm 1/25/99 */ | |
80322306 | 733 | /* 't' added for ptrdiff_t */ |
1da177e4 | 734 | |
f796937a JF |
735 | /* Reject out-of-range values early. Large positive sizes are |
736 | used for unknown buffer sizes. */ | |
1da177e4 LT |
737 | if (unlikely((int) size < 0)) { |
738 | /* There can be only one.. */ | |
b39a7340 | 739 | static char warn = 1; |
1da177e4 LT |
740 | WARN_ON(warn); |
741 | warn = 0; | |
742 | return 0; | |
743 | } | |
744 | ||
745 | str = buf; | |
f796937a | 746 | end = buf + size; |
1da177e4 | 747 | |
f796937a JF |
748 | /* Make sure end is always >= buf */ |
749 | if (end < buf) { | |
750 | end = ((void *)-1); | |
751 | size = end - buf; | |
1da177e4 LT |
752 | } |
753 | ||
754 | for (; *fmt ; ++fmt) { | |
755 | if (*fmt != '%') { | |
f796937a | 756 | if (str < end) |
1da177e4 LT |
757 | *str = *fmt; |
758 | ++str; | |
759 | continue; | |
760 | } | |
761 | ||
762 | /* process flags */ | |
763 | flags = 0; | |
764 | repeat: | |
765 | ++fmt; /* this also skips first '%' */ | |
766 | switch (*fmt) { | |
767 | case '-': flags |= LEFT; goto repeat; | |
768 | case '+': flags |= PLUS; goto repeat; | |
769 | case ' ': flags |= SPACE; goto repeat; | |
770 | case '#': flags |= SPECIAL; goto repeat; | |
771 | case '0': flags |= ZEROPAD; goto repeat; | |
772 | } | |
773 | ||
774 | /* get field width */ | |
775 | field_width = -1; | |
776 | if (isdigit(*fmt)) | |
777 | field_width = skip_atoi(&fmt); | |
778 | else if (*fmt == '*') { | |
779 | ++fmt; | |
780 | /* it's the next argument */ | |
781 | field_width = va_arg(args, int); | |
782 | if (field_width < 0) { | |
783 | field_width = -field_width; | |
784 | flags |= LEFT; | |
785 | } | |
786 | } | |
787 | ||
788 | /* get the precision */ | |
789 | precision = -1; | |
790 | if (*fmt == '.') { | |
791 | ++fmt; | |
792 | if (isdigit(*fmt)) | |
793 | precision = skip_atoi(&fmt); | |
794 | else if (*fmt == '*') { | |
795 | ++fmt; | |
796 | /* it's the next argument */ | |
797 | precision = va_arg(args, int); | |
798 | } | |
799 | if (precision < 0) | |
800 | precision = 0; | |
801 | } | |
802 | ||
803 | /* get the conversion qualifier */ | |
804 | qualifier = -1; | |
805 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || | |
80322306 | 806 | *fmt =='Z' || *fmt == 'z' || *fmt == 't') { |
1da177e4 LT |
807 | qualifier = *fmt; |
808 | ++fmt; | |
809 | if (qualifier == 'l' && *fmt == 'l') { | |
810 | qualifier = 'L'; | |
811 | ++fmt; | |
812 | } | |
813 | } | |
814 | ||
815 | /* default base */ | |
816 | base = 10; | |
817 | ||
818 | switch (*fmt) { | |
819 | case 'c': | |
820 | if (!(flags & LEFT)) { | |
821 | while (--field_width > 0) { | |
f796937a | 822 | if (str < end) |
1da177e4 LT |
823 | *str = ' '; |
824 | ++str; | |
825 | } | |
826 | } | |
827 | c = (unsigned char) va_arg(args, int); | |
f796937a | 828 | if (str < end) |
1da177e4 LT |
829 | *str = c; |
830 | ++str; | |
831 | while (--field_width > 0) { | |
f796937a | 832 | if (str < end) |
1da177e4 LT |
833 | *str = ' '; |
834 | ++str; | |
835 | } | |
836 | continue; | |
837 | ||
838 | case 's': | |
0f9bfa56 | 839 | str = string(str, end, va_arg(args, char *), field_width, precision, flags); |
1da177e4 LT |
840 | continue; |
841 | ||
842 | case 'p': | |
4d8a743c LT |
843 | str = pointer(fmt+1, str, end, |
844 | va_arg(args, void *), | |
845 | field_width, precision, flags); | |
846 | /* Skip all alphanumeric pointer suffixes */ | |
847 | while (isalnum(fmt[1])) | |
848 | fmt++; | |
1da177e4 LT |
849 | continue; |
850 | ||
1da177e4 LT |
851 | case 'n': |
852 | /* FIXME: | |
853 | * What does C99 say about the overflow case here? */ | |
854 | if (qualifier == 'l') { | |
855 | long * ip = va_arg(args, long *); | |
856 | *ip = (str - buf); | |
857 | } else if (qualifier == 'Z' || qualifier == 'z') { | |
858 | size_t * ip = va_arg(args, size_t *); | |
859 | *ip = (str - buf); | |
860 | } else { | |
861 | int * ip = va_arg(args, int *); | |
862 | *ip = (str - buf); | |
863 | } | |
864 | continue; | |
865 | ||
866 | case '%': | |
f796937a | 867 | if (str < end) |
1da177e4 LT |
868 | *str = '%'; |
869 | ++str; | |
870 | continue; | |
871 | ||
872 | /* integer number formats - set up the flags and "break" */ | |
873 | case 'o': | |
874 | base = 8; | |
875 | break; | |
876 | ||
1da177e4 | 877 | case 'x': |
9b706aee DV |
878 | flags |= SMALL; |
879 | case 'X': | |
1da177e4 LT |
880 | base = 16; |
881 | break; | |
882 | ||
883 | case 'd': | |
884 | case 'i': | |
885 | flags |= SIGN; | |
886 | case 'u': | |
887 | break; | |
888 | ||
889 | default: | |
f796937a | 890 | if (str < end) |
1da177e4 LT |
891 | *str = '%'; |
892 | ++str; | |
893 | if (*fmt) { | |
f796937a | 894 | if (str < end) |
1da177e4 LT |
895 | *str = *fmt; |
896 | ++str; | |
897 | } else { | |
898 | --fmt; | |
899 | } | |
900 | continue; | |
901 | } | |
902 | if (qualifier == 'L') | |
903 | num = va_arg(args, long long); | |
904 | else if (qualifier == 'l') { | |
905 | num = va_arg(args, unsigned long); | |
906 | if (flags & SIGN) | |
907 | num = (signed long) num; | |
908 | } else if (qualifier == 'Z' || qualifier == 'z') { | |
909 | num = va_arg(args, size_t); | |
80322306 AV |
910 | } else if (qualifier == 't') { |
911 | num = va_arg(args, ptrdiff_t); | |
1da177e4 LT |
912 | } else if (qualifier == 'h') { |
913 | num = (unsigned short) va_arg(args, int); | |
914 | if (flags & SIGN) | |
915 | num = (signed short) num; | |
916 | } else { | |
917 | num = va_arg(args, unsigned int); | |
918 | if (flags & SIGN) | |
919 | num = (signed int) num; | |
920 | } | |
921 | str = number(str, end, num, base, | |
922 | field_width, precision, flags); | |
923 | } | |
f796937a JF |
924 | if (size > 0) { |
925 | if (str < end) | |
926 | *str = '\0'; | |
927 | else | |
0a6047ee | 928 | end[-1] = '\0'; |
f796937a JF |
929 | } |
930 | /* the trailing null byte doesn't count towards the total */ | |
1da177e4 LT |
931 | return str-buf; |
932 | } | |
1da177e4 LT |
933 | EXPORT_SYMBOL(vsnprintf); |
934 | ||
935 | /** | |
936 | * vscnprintf - Format a string and place it in a buffer | |
937 | * @buf: The buffer to place the result into | |
938 | * @size: The size of the buffer, including the trailing null space | |
939 | * @fmt: The format string to use | |
940 | * @args: Arguments for the format string | |
941 | * | |
942 | * The return value is the number of characters which have been written into | |
943 | * the @buf not including the trailing '\0'. If @size is <= 0 the function | |
944 | * returns 0. | |
945 | * | |
946 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 947 | * You probably want scnprintf() instead. |
20036fdc AK |
948 | * |
949 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
950 | */ |
951 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
952 | { | |
953 | int i; | |
954 | ||
955 | i=vsnprintf(buf,size,fmt,args); | |
956 | return (i >= size) ? (size - 1) : i; | |
957 | } | |
1da177e4 LT |
958 | EXPORT_SYMBOL(vscnprintf); |
959 | ||
960 | /** | |
961 | * snprintf - Format a string and place it in a buffer | |
962 | * @buf: The buffer to place the result into | |
963 | * @size: The size of the buffer, including the trailing null space | |
964 | * @fmt: The format string to use | |
965 | * @...: Arguments for the format string | |
966 | * | |
967 | * The return value is the number of characters which would be | |
968 | * generated for the given input, excluding the trailing null, | |
969 | * as per ISO C99. If the return is greater than or equal to | |
970 | * @size, the resulting string is truncated. | |
20036fdc AK |
971 | * |
972 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
973 | */ |
974 | int snprintf(char * buf, size_t size, const char *fmt, ...) | |
975 | { | |
976 | va_list args; | |
977 | int i; | |
978 | ||
979 | va_start(args, fmt); | |
980 | i=vsnprintf(buf,size,fmt,args); | |
981 | va_end(args); | |
982 | return i; | |
983 | } | |
1da177e4 LT |
984 | EXPORT_SYMBOL(snprintf); |
985 | ||
986 | /** | |
987 | * scnprintf - Format a string and place it in a buffer | |
988 | * @buf: The buffer to place the result into | |
989 | * @size: The size of the buffer, including the trailing null space | |
990 | * @fmt: The format string to use | |
991 | * @...: Arguments for the format string | |
992 | * | |
993 | * The return value is the number of characters written into @buf not including | |
ea6f3281 | 994 | * the trailing '\0'. If @size is <= 0 the function returns 0. |
1da177e4 LT |
995 | */ |
996 | ||
997 | int scnprintf(char * buf, size_t size, const char *fmt, ...) | |
998 | { | |
999 | va_list args; | |
1000 | int i; | |
1001 | ||
1002 | va_start(args, fmt); | |
1003 | i = vsnprintf(buf, size, fmt, args); | |
1004 | va_end(args); | |
1005 | return (i >= size) ? (size - 1) : i; | |
1006 | } | |
1007 | EXPORT_SYMBOL(scnprintf); | |
1008 | ||
1009 | /** | |
1010 | * vsprintf - Format a string and place it in a buffer | |
1011 | * @buf: The buffer to place the result into | |
1012 | * @fmt: The format string to use | |
1013 | * @args: Arguments for the format string | |
1014 | * | |
1015 | * The function returns the number of characters written | |
72fd4a35 | 1016 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1017 | * buffer overflows. |
1018 | * | |
1019 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1020 | * You probably want sprintf() instead. |
20036fdc AK |
1021 | * |
1022 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1023 | */ |
1024 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1025 | { | |
1026 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1027 | } | |
1da177e4 LT |
1028 | EXPORT_SYMBOL(vsprintf); |
1029 | ||
1030 | /** | |
1031 | * sprintf - Format a string and place it in a buffer | |
1032 | * @buf: The buffer to place the result into | |
1033 | * @fmt: The format string to use | |
1034 | * @...: Arguments for the format string | |
1035 | * | |
1036 | * The function returns the number of characters written | |
72fd4a35 | 1037 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1038 | * buffer overflows. |
20036fdc AK |
1039 | * |
1040 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1041 | */ |
1042 | int sprintf(char * buf, const char *fmt, ...) | |
1043 | { | |
1044 | va_list args; | |
1045 | int i; | |
1046 | ||
1047 | va_start(args, fmt); | |
1048 | i=vsnprintf(buf, INT_MAX, fmt, args); | |
1049 | va_end(args); | |
1050 | return i; | |
1051 | } | |
1da177e4 LT |
1052 | EXPORT_SYMBOL(sprintf); |
1053 | ||
1054 | /** | |
1055 | * vsscanf - Unformat a buffer into a list of arguments | |
1056 | * @buf: input buffer | |
1057 | * @fmt: format of buffer | |
1058 | * @args: arguments | |
1059 | */ | |
1060 | int vsscanf(const char * buf, const char * fmt, va_list args) | |
1061 | { | |
1062 | const char *str = buf; | |
1063 | char *next; | |
1064 | char digit; | |
1065 | int num = 0; | |
1066 | int qualifier; | |
1067 | int base; | |
1068 | int field_width; | |
1069 | int is_sign = 0; | |
1070 | ||
1071 | while(*fmt && *str) { | |
1072 | /* skip any white space in format */ | |
1073 | /* white space in format matchs any amount of | |
1074 | * white space, including none, in the input. | |
1075 | */ | |
1076 | if (isspace(*fmt)) { | |
1077 | while (isspace(*fmt)) | |
1078 | ++fmt; | |
1079 | while (isspace(*str)) | |
1080 | ++str; | |
1081 | } | |
1082 | ||
1083 | /* anything that is not a conversion must match exactly */ | |
1084 | if (*fmt != '%' && *fmt) { | |
1085 | if (*fmt++ != *str++) | |
1086 | break; | |
1087 | continue; | |
1088 | } | |
1089 | ||
1090 | if (!*fmt) | |
1091 | break; | |
1092 | ++fmt; | |
1093 | ||
1094 | /* skip this conversion. | |
1095 | * advance both strings to next white space | |
1096 | */ | |
1097 | if (*fmt == '*') { | |
1098 | while (!isspace(*fmt) && *fmt) | |
1099 | fmt++; | |
1100 | while (!isspace(*str) && *str) | |
1101 | str++; | |
1102 | continue; | |
1103 | } | |
1104 | ||
1105 | /* get field width */ | |
1106 | field_width = -1; | |
1107 | if (isdigit(*fmt)) | |
1108 | field_width = skip_atoi(&fmt); | |
1109 | ||
1110 | /* get conversion qualifier */ | |
1111 | qualifier = -1; | |
1112 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || | |
1113 | *fmt == 'Z' || *fmt == 'z') { | |
1114 | qualifier = *fmt++; | |
1115 | if (unlikely(qualifier == *fmt)) { | |
1116 | if (qualifier == 'h') { | |
1117 | qualifier = 'H'; | |
1118 | fmt++; | |
1119 | } else if (qualifier == 'l') { | |
1120 | qualifier = 'L'; | |
1121 | fmt++; | |
1122 | } | |
1123 | } | |
1124 | } | |
1125 | base = 10; | |
1126 | is_sign = 0; | |
1127 | ||
1128 | if (!*fmt || !*str) | |
1129 | break; | |
1130 | ||
1131 | switch(*fmt++) { | |
1132 | case 'c': | |
1133 | { | |
1134 | char *s = (char *) va_arg(args,char*); | |
1135 | if (field_width == -1) | |
1136 | field_width = 1; | |
1137 | do { | |
1138 | *s++ = *str++; | |
1139 | } while (--field_width > 0 && *str); | |
1140 | num++; | |
1141 | } | |
1142 | continue; | |
1143 | case 's': | |
1144 | { | |
1145 | char *s = (char *) va_arg(args, char *); | |
1146 | if(field_width == -1) | |
1147 | field_width = INT_MAX; | |
1148 | /* first, skip leading white space in buffer */ | |
1149 | while (isspace(*str)) | |
1150 | str++; | |
1151 | ||
1152 | /* now copy until next white space */ | |
1153 | while (*str && !isspace(*str) && field_width--) { | |
1154 | *s++ = *str++; | |
1155 | } | |
1156 | *s = '\0'; | |
1157 | num++; | |
1158 | } | |
1159 | continue; | |
1160 | case 'n': | |
1161 | /* return number of characters read so far */ | |
1162 | { | |
1163 | int *i = (int *)va_arg(args,int*); | |
1164 | *i = str - buf; | |
1165 | } | |
1166 | continue; | |
1167 | case 'o': | |
1168 | base = 8; | |
1169 | break; | |
1170 | case 'x': | |
1171 | case 'X': | |
1172 | base = 16; | |
1173 | break; | |
1174 | case 'i': | |
1175 | base = 0; | |
1176 | case 'd': | |
1177 | is_sign = 1; | |
1178 | case 'u': | |
1179 | break; | |
1180 | case '%': | |
1181 | /* looking for '%' in str */ | |
1182 | if (*str++ != '%') | |
1183 | return num; | |
1184 | continue; | |
1185 | default: | |
1186 | /* invalid format; stop here */ | |
1187 | return num; | |
1188 | } | |
1189 | ||
1190 | /* have some sort of integer conversion. | |
1191 | * first, skip white space in buffer. | |
1192 | */ | |
1193 | while (isspace(*str)) | |
1194 | str++; | |
1195 | ||
1196 | digit = *str; | |
1197 | if (is_sign && digit == '-') | |
1198 | digit = *(str + 1); | |
1199 | ||
1200 | if (!digit | |
1201 | || (base == 16 && !isxdigit(digit)) | |
1202 | || (base == 10 && !isdigit(digit)) | |
1203 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
1204 | || (base == 0 && !isdigit(digit))) | |
1205 | break; | |
1206 | ||
1207 | switch(qualifier) { | |
1208 | case 'H': /* that's 'hh' in format */ | |
1209 | if (is_sign) { | |
1210 | signed char *s = (signed char *) va_arg(args,signed char *); | |
1211 | *s = (signed char) simple_strtol(str,&next,base); | |
1212 | } else { | |
1213 | unsigned char *s = (unsigned char *) va_arg(args, unsigned char *); | |
1214 | *s = (unsigned char) simple_strtoul(str, &next, base); | |
1215 | } | |
1216 | break; | |
1217 | case 'h': | |
1218 | if (is_sign) { | |
1219 | short *s = (short *) va_arg(args,short *); | |
1220 | *s = (short) simple_strtol(str,&next,base); | |
1221 | } else { | |
1222 | unsigned short *s = (unsigned short *) va_arg(args, unsigned short *); | |
1223 | *s = (unsigned short) simple_strtoul(str, &next, base); | |
1224 | } | |
1225 | break; | |
1226 | case 'l': | |
1227 | if (is_sign) { | |
1228 | long *l = (long *) va_arg(args,long *); | |
1229 | *l = simple_strtol(str,&next,base); | |
1230 | } else { | |
1231 | unsigned long *l = (unsigned long*) va_arg(args,unsigned long*); | |
1232 | *l = simple_strtoul(str,&next,base); | |
1233 | } | |
1234 | break; | |
1235 | case 'L': | |
1236 | if (is_sign) { | |
1237 | long long *l = (long long*) va_arg(args,long long *); | |
1238 | *l = simple_strtoll(str,&next,base); | |
1239 | } else { | |
1240 | unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*); | |
1241 | *l = simple_strtoull(str,&next,base); | |
1242 | } | |
1243 | break; | |
1244 | case 'Z': | |
1245 | case 'z': | |
1246 | { | |
1247 | size_t *s = (size_t*) va_arg(args,size_t*); | |
1248 | *s = (size_t) simple_strtoul(str,&next,base); | |
1249 | } | |
1250 | break; | |
1251 | default: | |
1252 | if (is_sign) { | |
1253 | int *i = (int *) va_arg(args, int*); | |
1254 | *i = (int) simple_strtol(str,&next,base); | |
1255 | } else { | |
1256 | unsigned int *i = (unsigned int*) va_arg(args, unsigned int*); | |
1257 | *i = (unsigned int) simple_strtoul(str,&next,base); | |
1258 | } | |
1259 | break; | |
1260 | } | |
1261 | num++; | |
1262 | ||
1263 | if (!next) | |
1264 | break; | |
1265 | str = next; | |
1266 | } | |
c6b40d16 JB |
1267 | |
1268 | /* | |
1269 | * Now we've come all the way through so either the input string or the | |
1270 | * format ended. In the former case, there can be a %n at the current | |
1271 | * position in the format that needs to be filled. | |
1272 | */ | |
1273 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
1274 | int *p = (int *)va_arg(args, int *); | |
1275 | *p = str - buf; | |
1276 | } | |
1277 | ||
1da177e4 LT |
1278 | return num; |
1279 | } | |
1da177e4 LT |
1280 | EXPORT_SYMBOL(vsscanf); |
1281 | ||
1282 | /** | |
1283 | * sscanf - Unformat a buffer into a list of arguments | |
1284 | * @buf: input buffer | |
1285 | * @fmt: formatting of buffer | |
1286 | * @...: resulting arguments | |
1287 | */ | |
1288 | int sscanf(const char * buf, const char * fmt, ...) | |
1289 | { | |
1290 | va_list args; | |
1291 | int i; | |
1292 | ||
1293 | va_start(args,fmt); | |
1294 | i = vsscanf(buf,fmt,args); | |
1295 | va_end(args); | |
1296 | return i; | |
1297 | } | |
1da177e4 | 1298 | EXPORT_SYMBOL(sscanf); |