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); | |
e899aa82 PM |
173 | if (tail == cp) |
174 | return -EINVAL; | |
9d85db22 HH |
175 | if ((*tail == '\0') || |
176 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
177 | *res = val; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | return -EINVAL; | |
182 | } | |
183 | EXPORT_SYMBOL(strict_strtoul); | |
06b2a76d YY |
184 | |
185 | /** | |
186 | * strict_strtol - convert a string to a long strictly | |
187 | * @cp: The string to be converted | |
188 | * @base: The number base to use | |
189 | * @res: The converted result value | |
190 | * | |
191 | * strict_strtol is similiar to strict_strtoul, but it allows the first | |
192 | * character of a string is '-'. | |
193 | * | |
194 | * It returns 0 if conversion is successful and *res is set to the converted | |
195 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
196 | */ | |
9d85db22 HH |
197 | int strict_strtol(const char *cp, unsigned int base, long *res) |
198 | { | |
199 | int ret; | |
200 | if (*cp == '-') { | |
201 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); | |
202 | if (!ret) | |
203 | *res = -(*res); | |
204 | } else { | |
205 | ret = strict_strtoul(cp, base, (unsigned long *)res); | |
206 | } | |
207 | ||
208 | return ret; | |
209 | } | |
210 | EXPORT_SYMBOL(strict_strtol); | |
06b2a76d YY |
211 | |
212 | /** | |
213 | * strict_strtoull - convert a string to an unsigned long long strictly | |
214 | * @cp: The string to be converted | |
215 | * @base: The number base to use | |
216 | * @res: The converted result value | |
217 | * | |
218 | * strict_strtoull converts a string to an unsigned long long only if the | |
219 | * string is really an unsigned long long string, any string containing | |
220 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
221 | * only a newline char at the tail is acceptible because people generally | |
222 | * change a module parameter in the following way: | |
223 | * | |
224 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
225 | * | |
226 | * echo will append a newline to the tail of the string. | |
227 | * | |
228 | * It returns 0 if conversion is successful and *res is set to the converted | |
229 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
230 | * | |
231 | * simple_strtoull just ignores the successive invalid characters and | |
232 | * return the converted value of prefix part of the string. | |
233 | */ | |
9d85db22 HH |
234 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
235 | { | |
236 | char *tail; | |
237 | unsigned long long val; | |
238 | size_t len; | |
239 | ||
240 | *res = 0; | |
241 | len = strlen(cp); | |
242 | if (len == 0) | |
243 | return -EINVAL; | |
244 | ||
245 | val = simple_strtoull(cp, &tail, base); | |
e899aa82 PM |
246 | if (tail == cp) |
247 | return -EINVAL; | |
9d85db22 HH |
248 | if ((*tail == '\0') || |
249 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
250 | *res = val; | |
251 | return 0; | |
252 | } | |
253 | ||
254 | return -EINVAL; | |
255 | } | |
256 | EXPORT_SYMBOL(strict_strtoull); | |
06b2a76d YY |
257 | |
258 | /** | |
259 | * strict_strtoll - convert a string to a long long strictly | |
260 | * @cp: The string to be converted | |
261 | * @base: The number base to use | |
262 | * @res: The converted result value | |
263 | * | |
264 | * strict_strtoll is similiar to strict_strtoull, but it allows the first | |
265 | * character of a string is '-'. | |
266 | * | |
267 | * It returns 0 if conversion is successful and *res is set to the converted | |
268 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
269 | */ | |
9d85db22 HH |
270 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
271 | { | |
272 | int ret; | |
273 | if (*cp == '-') { | |
274 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); | |
275 | if (!ret) | |
276 | *res = -(*res); | |
277 | } else { | |
278 | ret = strict_strtoull(cp, base, (unsigned long long *)res); | |
279 | } | |
06b2a76d | 280 | |
9d85db22 HH |
281 | return ret; |
282 | } | |
06b2a76d | 283 | EXPORT_SYMBOL(strict_strtoll); |
06b2a76d | 284 | |
1da177e4 LT |
285 | static int skip_atoi(const char **s) |
286 | { | |
287 | int i=0; | |
288 | ||
289 | while (isdigit(**s)) | |
290 | i = i*10 + *((*s)++) - '0'; | |
291 | return i; | |
292 | } | |
293 | ||
4277eedd DV |
294 | /* Decimal conversion is by far the most typical, and is used |
295 | * for /proc and /sys data. This directly impacts e.g. top performance | |
296 | * with many processes running. We optimize it for speed | |
297 | * using code from | |
298 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
299 | * (with permission from the author, Douglas W. Jones). */ | |
300 | ||
301 | /* Formats correctly any integer in [0,99999]. | |
302 | * Outputs from one to five digits depending on input. | |
303 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
304 | static char* put_dec_trunc(char *buf, unsigned q) | |
305 | { | |
306 | unsigned d3, d2, d1, d0; | |
307 | d1 = (q>>4) & 0xf; | |
308 | d2 = (q>>8) & 0xf; | |
309 | d3 = (q>>12); | |
310 | ||
311 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
312 | q = (d0 * 0xcd) >> 11; | |
313 | d0 = d0 - 10*q; | |
314 | *buf++ = d0 + '0'; /* least significant digit */ | |
315 | d1 = q + 9*d3 + 5*d2 + d1; | |
316 | if (d1 != 0) { | |
317 | q = (d1 * 0xcd) >> 11; | |
318 | d1 = d1 - 10*q; | |
319 | *buf++ = d1 + '0'; /* next digit */ | |
320 | ||
321 | d2 = q + 2*d2; | |
322 | if ((d2 != 0) || (d3 != 0)) { | |
323 | q = (d2 * 0xd) >> 7; | |
324 | d2 = d2 - 10*q; | |
325 | *buf++ = d2 + '0'; /* next digit */ | |
326 | ||
327 | d3 = q + 4*d3; | |
328 | if (d3 != 0) { | |
329 | q = (d3 * 0xcd) >> 11; | |
330 | d3 = d3 - 10*q; | |
331 | *buf++ = d3 + '0'; /* next digit */ | |
332 | if (q != 0) | |
333 | *buf++ = q + '0'; /* most sign. digit */ | |
334 | } | |
335 | } | |
336 | } | |
337 | return buf; | |
338 | } | |
339 | /* Same with if's removed. Always emits five digits */ | |
340 | static char* put_dec_full(char *buf, unsigned q) | |
341 | { | |
342 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
343 | /* but anyway, gcc produces better code with full-sized ints */ | |
344 | unsigned d3, d2, d1, d0; | |
345 | d1 = (q>>4) & 0xf; | |
346 | d2 = (q>>8) & 0xf; | |
347 | d3 = (q>>12); | |
348 | ||
349 | /* Possible ways to approx. divide by 10 */ | |
350 | /* gcc -O2 replaces multiply with shifts and adds */ | |
351 | // (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
352 | // (x * 0x67) >> 10: 1100111 | |
353 | // (x * 0x34) >> 9: 110100 - same | |
354 | // (x * 0x1a) >> 8: 11010 - same | |
355 | // (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
356 | ||
357 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
358 | q = (d0 * 0xcd) >> 11; | |
359 | d0 = d0 - 10*q; | |
360 | *buf++ = d0 + '0'; | |
361 | d1 = q + 9*d3 + 5*d2 + d1; | |
362 | q = (d1 * 0xcd) >> 11; | |
363 | d1 = d1 - 10*q; | |
364 | *buf++ = d1 + '0'; | |
365 | ||
366 | d2 = q + 2*d2; | |
367 | q = (d2 * 0xd) >> 7; | |
368 | d2 = d2 - 10*q; | |
369 | *buf++ = d2 + '0'; | |
370 | ||
371 | d3 = q + 4*d3; | |
372 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
373 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
374 | d3 = d3 - 10*q; | |
375 | *buf++ = d3 + '0'; | |
376 | *buf++ = q + '0'; | |
377 | return buf; | |
378 | } | |
379 | /* No inlining helps gcc to use registers better */ | |
380 | static noinline char* put_dec(char *buf, unsigned long long num) | |
381 | { | |
382 | while (1) { | |
383 | unsigned rem; | |
384 | if (num < 100000) | |
385 | return put_dec_trunc(buf, num); | |
386 | rem = do_div(num, 100000); | |
387 | buf = put_dec_full(buf, rem); | |
388 | } | |
389 | } | |
390 | ||
1da177e4 LT |
391 | #define ZEROPAD 1 /* pad with zero */ |
392 | #define SIGN 2 /* unsigned/signed long */ | |
393 | #define PLUS 4 /* show plus */ | |
394 | #define SPACE 8 /* space if plus */ | |
395 | #define LEFT 16 /* left justified */ | |
9b706aee DV |
396 | #define SMALL 32 /* Must be 32 == 0x20 */ |
397 | #define SPECIAL 64 /* 0x */ | |
1da177e4 | 398 | |
b39a7340 | 399 | static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type) |
1da177e4 | 400 | { |
9b706aee DV |
401 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
402 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ | |
403 | ||
404 | char tmp[66]; | |
405 | char sign; | |
406 | char locase; | |
b39a7340 | 407 | int need_pfx = ((type & SPECIAL) && base != 10); |
1da177e4 LT |
408 | int i; |
409 | ||
9b706aee DV |
410 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
411 | * produces same digits or (maybe lowercased) letters */ | |
412 | locase = (type & SMALL); | |
1da177e4 LT |
413 | if (type & LEFT) |
414 | type &= ~ZEROPAD; | |
1da177e4 LT |
415 | sign = 0; |
416 | if (type & SIGN) { | |
417 | if ((signed long long) num < 0) { | |
418 | sign = '-'; | |
419 | num = - (signed long long) num; | |
420 | size--; | |
421 | } else if (type & PLUS) { | |
422 | sign = '+'; | |
423 | size--; | |
424 | } else if (type & SPACE) { | |
425 | sign = ' '; | |
426 | size--; | |
427 | } | |
428 | } | |
b39a7340 DV |
429 | if (need_pfx) { |
430 | size--; | |
1da177e4 | 431 | if (base == 16) |
1da177e4 LT |
432 | size--; |
433 | } | |
b39a7340 DV |
434 | |
435 | /* generate full string in tmp[], in reverse order */ | |
1da177e4 LT |
436 | i = 0; |
437 | if (num == 0) | |
b39a7340 | 438 | tmp[i++] = '0'; |
4277eedd DV |
439 | /* Generic code, for any base: |
440 | else do { | |
9b706aee | 441 | tmp[i++] = (digits[do_div(num,base)] | locase); |
4277eedd DV |
442 | } while (num != 0); |
443 | */ | |
b39a7340 DV |
444 | else if (base != 10) { /* 8 or 16 */ |
445 | int mask = base - 1; | |
446 | int shift = 3; | |
447 | if (base == 16) shift = 4; | |
448 | do { | |
9b706aee | 449 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
b39a7340 DV |
450 | num >>= shift; |
451 | } while (num); | |
4277eedd DV |
452 | } else { /* base 10 */ |
453 | i = put_dec(tmp, num) - tmp; | |
454 | } | |
b39a7340 DV |
455 | |
456 | /* printing 100 using %2d gives "100", not "00" */ | |
1da177e4 LT |
457 | if (i > precision) |
458 | precision = i; | |
b39a7340 | 459 | /* leading space padding */ |
1da177e4 | 460 | size -= precision; |
b39a7340 DV |
461 | if (!(type & (ZEROPAD+LEFT))) { |
462 | while(--size >= 0) { | |
f796937a | 463 | if (buf < end) |
1da177e4 LT |
464 | *buf = ' '; |
465 | ++buf; | |
466 | } | |
467 | } | |
b39a7340 | 468 | /* sign */ |
1da177e4 | 469 | if (sign) { |
f796937a | 470 | if (buf < end) |
1da177e4 LT |
471 | *buf = sign; |
472 | ++buf; | |
473 | } | |
b39a7340 DV |
474 | /* "0x" / "0" prefix */ |
475 | if (need_pfx) { | |
476 | if (buf < end) | |
477 | *buf = '0'; | |
478 | ++buf; | |
479 | if (base == 16) { | |
f796937a | 480 | if (buf < end) |
9b706aee | 481 | *buf = ('X' | locase); |
1da177e4 LT |
482 | ++buf; |
483 | } | |
484 | } | |
b39a7340 | 485 | /* zero or space padding */ |
1da177e4 | 486 | if (!(type & LEFT)) { |
b39a7340 DV |
487 | char c = (type & ZEROPAD) ? '0' : ' '; |
488 | while (--size >= 0) { | |
f796937a | 489 | if (buf < end) |
1da177e4 LT |
490 | *buf = c; |
491 | ++buf; | |
492 | } | |
493 | } | |
b39a7340 DV |
494 | /* hmm even more zero padding? */ |
495 | while (i <= --precision) { | |
f796937a | 496 | if (buf < end) |
1da177e4 LT |
497 | *buf = '0'; |
498 | ++buf; | |
499 | } | |
b39a7340 DV |
500 | /* actual digits of result */ |
501 | while (--i >= 0) { | |
f796937a | 502 | if (buf < end) |
1da177e4 LT |
503 | *buf = tmp[i]; |
504 | ++buf; | |
505 | } | |
b39a7340 DV |
506 | /* trailing space padding */ |
507 | while (--size >= 0) { | |
f796937a | 508 | if (buf < end) |
1da177e4 LT |
509 | *buf = ' '; |
510 | ++buf; | |
511 | } | |
512 | return buf; | |
513 | } | |
514 | ||
0f9bfa56 LT |
515 | static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags) |
516 | { | |
517 | int len, i; | |
518 | ||
519 | if ((unsigned long)s < PAGE_SIZE) | |
520 | s = "<NULL>"; | |
521 | ||
522 | len = strnlen(s, precision); | |
523 | ||
524 | if (!(flags & LEFT)) { | |
525 | while (len < field_width--) { | |
526 | if (buf < end) | |
527 | *buf = ' '; | |
528 | ++buf; | |
529 | } | |
530 | } | |
531 | for (i = 0; i < len; ++i) { | |
532 | if (buf < end) | |
533 | *buf = *s; | |
534 | ++buf; ++s; | |
535 | } | |
536 | while (len < field_width--) { | |
537 | if (buf < end) | |
538 | *buf = ' '; | |
539 | ++buf; | |
540 | } | |
541 | return buf; | |
542 | } | |
543 | ||
0fe1ef24 LT |
544 | static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags) |
545 | { | |
546 | unsigned long value = (unsigned long) ptr; | |
547 | #ifdef CONFIG_KALLSYMS | |
548 | char sym[KSYM_SYMBOL_LEN]; | |
549 | sprint_symbol(sym, value); | |
550 | return string(buf, end, sym, field_width, precision, flags); | |
551 | #else | |
552 | field_width = 2*sizeof(void *); | |
553 | flags |= SPECIAL | SMALL | ZEROPAD; | |
554 | return number(buf, end, value, 16, field_width, precision, flags); | |
555 | #endif | |
556 | } | |
557 | ||
332d2e78 LT |
558 | static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags) |
559 | { | |
560 | #ifndef IO_RSRC_PRINTK_SIZE | |
561 | #define IO_RSRC_PRINTK_SIZE 4 | |
562 | #endif | |
563 | ||
564 | #ifndef MEM_RSRC_PRINTK_SIZE | |
565 | #define MEM_RSRC_PRINTK_SIZE 8 | |
566 | #endif | |
567 | ||
568 | /* room for the actual numbers, the two "0x", -, [, ] and the final zero */ | |
569 | char sym[4*sizeof(resource_size_t) + 8]; | |
570 | char *p = sym, *pend = sym + sizeof(sym); | |
571 | int size = -1; | |
572 | ||
573 | if (res->flags & IORESOURCE_IO) | |
574 | size = IO_RSRC_PRINTK_SIZE; | |
575 | else if (res->flags & IORESOURCE_MEM) | |
576 | size = MEM_RSRC_PRINTK_SIZE; | |
577 | ||
578 | *p++ = '['; | |
579 | p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD); | |
580 | *p++ = '-'; | |
581 | p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD); | |
582 | *p++ = ']'; | |
583 | *p = 0; | |
584 | ||
585 | return string(buf, end, sym, field_width, precision, flags); | |
586 | } | |
587 | ||
dd45c9cf HH |
588 | static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
589 | int precision, int flags) | |
590 | { | |
591 | char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */ | |
592 | char *p = mac_addr; | |
593 | int i; | |
594 | ||
595 | for (i = 0; i < 6; i++) { | |
596 | p = pack_hex_byte(p, addr[i]); | |
597 | if (!(flags & SPECIAL) && i != 5) | |
598 | *p++ = ':'; | |
599 | } | |
600 | *p = '\0'; | |
601 | ||
602 | return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL); | |
603 | } | |
604 | ||
689afa7d HH |
605 | static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
606 | int precision, int flags) | |
607 | { | |
608 | char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */ | |
609 | char *p = ip6_addr; | |
610 | int i; | |
611 | ||
612 | for (i = 0; i < 8; i++) { | |
613 | p = pack_hex_byte(p, addr[2 * i]); | |
614 | p = pack_hex_byte(p, addr[2 * i + 1]); | |
615 | if (!(flags & SPECIAL) && i != 7) | |
616 | *p++ = ':'; | |
617 | } | |
618 | *p = '\0'; | |
619 | ||
620 | return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL); | |
621 | } | |
622 | ||
4aa99606 HH |
623 | static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
624 | int precision, int flags) | |
625 | { | |
626 | char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */ | |
b9ac9985 | 627 | char temp[3]; /* hold each IP quad in reverse order */ |
4aa99606 | 628 | char *p = ip4_addr; |
b9ac9985 | 629 | int i, digits; |
4aa99606 HH |
630 | |
631 | for (i = 0; i < 4; i++) { | |
b9ac9985 HH |
632 | digits = put_dec_trunc(temp, addr[i]) - temp; |
633 | /* reverse the digits in the quad */ | |
634 | while (digits--) | |
635 | *p++ = temp[digits]; | |
4aa99606 HH |
636 | if (i != 3) |
637 | *p++ = '.'; | |
638 | } | |
639 | *p = '\0'; | |
640 | ||
641 | return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL); | |
642 | } | |
643 | ||
4d8a743c LT |
644 | /* |
645 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
646 | * by an extra set of alphanumeric characters that are extended format | |
647 | * specifiers. | |
648 | * | |
332d2e78 LT |
649 | * Right now we handle: |
650 | * | |
651 | * - 'F' For symbolic function descriptor pointers | |
652 | * - 'S' For symbolic direct pointers | |
653 | * - 'R' For a struct resource pointer, it prints the range of | |
654 | * addresses (not the name nor the flags) | |
dd45c9cf HH |
655 | * - 'M' For a 6-byte MAC address, it prints the address in the |
656 | * usual colon-separated hex notation | |
4aa99606 HH |
657 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated |
658 | * decimal for v4 and colon separated network-order 16 bit hex for v6) | |
659 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is | |
6b9a1066 | 660 | * currently the same |
0fe1ef24 | 661 | * |
332d2e78 LT |
662 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
663 | * function pointers are really function descriptors, which contain a | |
664 | * pointer to the real address. | |
4d8a743c LT |
665 | */ |
666 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags) | |
78a8bf69 | 667 | { |
d97106ab LT |
668 | if (!ptr) |
669 | return string(buf, end, "(null)", field_width, precision, flags); | |
670 | ||
0fe1ef24 LT |
671 | switch (*fmt) { |
672 | case 'F': | |
673 | ptr = dereference_function_descriptor(ptr); | |
674 | /* Fallthrough */ | |
675 | case 'S': | |
676 | return symbol_string(buf, end, ptr, field_width, precision, flags); | |
332d2e78 LT |
677 | case 'R': |
678 | return resource_string(buf, end, ptr, field_width, precision, flags); | |
411c41ee HH |
679 | case 'm': |
680 | flags |= SPECIAL; | |
681 | /* Fallthrough */ | |
dd45c9cf HH |
682 | case 'M': |
683 | return mac_address_string(buf, end, ptr, field_width, precision, flags); | |
4aa99606 HH |
684 | case 'i': |
685 | flags |= SPECIAL; | |
686 | /* Fallthrough */ | |
687 | case 'I': | |
688 | if (fmt[1] == '6') | |
689 | return ip6_addr_string(buf, end, ptr, field_width, precision, flags); | |
690 | if (fmt[1] == '4') | |
691 | return ip4_addr_string(buf, end, ptr, field_width, precision, flags); | |
692 | flags &= ~SPECIAL; | |
693 | break; | |
0fe1ef24 | 694 | } |
78a8bf69 LT |
695 | flags |= SMALL; |
696 | if (field_width == -1) { | |
697 | field_width = 2*sizeof(void *); | |
698 | flags |= ZEROPAD; | |
699 | } | |
700 | return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags); | |
701 | } | |
702 | ||
1da177e4 LT |
703 | /** |
704 | * vsnprintf - Format a string and place it in a buffer | |
705 | * @buf: The buffer to place the result into | |
706 | * @size: The size of the buffer, including the trailing null space | |
707 | * @fmt: The format string to use | |
708 | * @args: Arguments for the format string | |
709 | * | |
20036fdc AK |
710 | * This function follows C99 vsnprintf, but has some extensions: |
711 | * %pS output the name of a text symbol | |
712 | * %pF output the name of a function pointer | |
332d2e78 | 713 | * %pR output the address range in a struct resource |
20036fdc | 714 | * |
1da177e4 LT |
715 | * The return value is the number of characters which would |
716 | * be generated for the given input, excluding the trailing | |
717 | * '\0', as per ISO C99. If you want to have the exact | |
718 | * number of characters written into @buf as return value | |
72fd4a35 | 719 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
720 | * return is greater than or equal to @size, the resulting |
721 | * string is truncated. | |
722 | * | |
723 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 724 | * You probably want snprintf() instead. |
1da177e4 LT |
725 | */ |
726 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
727 | { | |
1da177e4 | 728 | unsigned long long num; |
0f9bfa56 | 729 | int base; |
1da177e4 | 730 | char *str, *end, c; |
1da177e4 LT |
731 | |
732 | int flags; /* flags to number() */ | |
733 | ||
734 | int field_width; /* width of output field */ | |
735 | int precision; /* min. # of digits for integers; max | |
736 | number of chars for from string */ | |
737 | int qualifier; /* 'h', 'l', or 'L' for integer fields */ | |
738 | /* 'z' support added 23/7/1999 S.H. */ | |
739 | /* 'z' changed to 'Z' --davidm 1/25/99 */ | |
80322306 | 740 | /* 't' added for ptrdiff_t */ |
1da177e4 | 741 | |
f796937a JF |
742 | /* Reject out-of-range values early. Large positive sizes are |
743 | used for unknown buffer sizes. */ | |
1da177e4 LT |
744 | if (unlikely((int) size < 0)) { |
745 | /* There can be only one.. */ | |
b39a7340 | 746 | static char warn = 1; |
1da177e4 LT |
747 | WARN_ON(warn); |
748 | warn = 0; | |
749 | return 0; | |
750 | } | |
751 | ||
752 | str = buf; | |
f796937a | 753 | end = buf + size; |
1da177e4 | 754 | |
f796937a JF |
755 | /* Make sure end is always >= buf */ |
756 | if (end < buf) { | |
757 | end = ((void *)-1); | |
758 | size = end - buf; | |
1da177e4 LT |
759 | } |
760 | ||
761 | for (; *fmt ; ++fmt) { | |
762 | if (*fmt != '%') { | |
f796937a | 763 | if (str < end) |
1da177e4 LT |
764 | *str = *fmt; |
765 | ++str; | |
766 | continue; | |
767 | } | |
768 | ||
769 | /* process flags */ | |
770 | flags = 0; | |
771 | repeat: | |
772 | ++fmt; /* this also skips first '%' */ | |
773 | switch (*fmt) { | |
774 | case '-': flags |= LEFT; goto repeat; | |
775 | case '+': flags |= PLUS; goto repeat; | |
776 | case ' ': flags |= SPACE; goto repeat; | |
777 | case '#': flags |= SPECIAL; goto repeat; | |
778 | case '0': flags |= ZEROPAD; goto repeat; | |
779 | } | |
780 | ||
781 | /* get field width */ | |
782 | field_width = -1; | |
783 | if (isdigit(*fmt)) | |
784 | field_width = skip_atoi(&fmt); | |
785 | else if (*fmt == '*') { | |
786 | ++fmt; | |
787 | /* it's the next argument */ | |
788 | field_width = va_arg(args, int); | |
789 | if (field_width < 0) { | |
790 | field_width = -field_width; | |
791 | flags |= LEFT; | |
792 | } | |
793 | } | |
794 | ||
795 | /* get the precision */ | |
796 | precision = -1; | |
797 | if (*fmt == '.') { | |
798 | ++fmt; | |
799 | if (isdigit(*fmt)) | |
800 | precision = skip_atoi(&fmt); | |
801 | else if (*fmt == '*') { | |
802 | ++fmt; | |
803 | /* it's the next argument */ | |
804 | precision = va_arg(args, int); | |
805 | } | |
806 | if (precision < 0) | |
807 | precision = 0; | |
808 | } | |
809 | ||
810 | /* get the conversion qualifier */ | |
811 | qualifier = -1; | |
812 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || | |
80322306 | 813 | *fmt =='Z' || *fmt == 'z' || *fmt == 't') { |
1da177e4 LT |
814 | qualifier = *fmt; |
815 | ++fmt; | |
816 | if (qualifier == 'l' && *fmt == 'l') { | |
817 | qualifier = 'L'; | |
818 | ++fmt; | |
819 | } | |
820 | } | |
821 | ||
822 | /* default base */ | |
823 | base = 10; | |
824 | ||
825 | switch (*fmt) { | |
826 | case 'c': | |
827 | if (!(flags & LEFT)) { | |
828 | while (--field_width > 0) { | |
f796937a | 829 | if (str < end) |
1da177e4 LT |
830 | *str = ' '; |
831 | ++str; | |
832 | } | |
833 | } | |
834 | c = (unsigned char) va_arg(args, int); | |
f796937a | 835 | if (str < end) |
1da177e4 LT |
836 | *str = c; |
837 | ++str; | |
838 | while (--field_width > 0) { | |
f796937a | 839 | if (str < end) |
1da177e4 LT |
840 | *str = ' '; |
841 | ++str; | |
842 | } | |
843 | continue; | |
844 | ||
845 | case 's': | |
0f9bfa56 | 846 | str = string(str, end, va_arg(args, char *), field_width, precision, flags); |
1da177e4 LT |
847 | continue; |
848 | ||
849 | case 'p': | |
4d8a743c LT |
850 | str = pointer(fmt+1, str, end, |
851 | va_arg(args, void *), | |
852 | field_width, precision, flags); | |
853 | /* Skip all alphanumeric pointer suffixes */ | |
854 | while (isalnum(fmt[1])) | |
855 | fmt++; | |
1da177e4 LT |
856 | continue; |
857 | ||
1da177e4 LT |
858 | case 'n': |
859 | /* FIXME: | |
860 | * What does C99 say about the overflow case here? */ | |
861 | if (qualifier == 'l') { | |
862 | long * ip = va_arg(args, long *); | |
863 | *ip = (str - buf); | |
864 | } else if (qualifier == 'Z' || qualifier == 'z') { | |
865 | size_t * ip = va_arg(args, size_t *); | |
866 | *ip = (str - buf); | |
867 | } else { | |
868 | int * ip = va_arg(args, int *); | |
869 | *ip = (str - buf); | |
870 | } | |
871 | continue; | |
872 | ||
873 | case '%': | |
f796937a | 874 | if (str < end) |
1da177e4 LT |
875 | *str = '%'; |
876 | ++str; | |
877 | continue; | |
878 | ||
879 | /* integer number formats - set up the flags and "break" */ | |
880 | case 'o': | |
881 | base = 8; | |
882 | break; | |
883 | ||
1da177e4 | 884 | case 'x': |
9b706aee DV |
885 | flags |= SMALL; |
886 | case 'X': | |
1da177e4 LT |
887 | base = 16; |
888 | break; | |
889 | ||
890 | case 'd': | |
891 | case 'i': | |
892 | flags |= SIGN; | |
893 | case 'u': | |
894 | break; | |
895 | ||
896 | default: | |
f796937a | 897 | if (str < end) |
1da177e4 LT |
898 | *str = '%'; |
899 | ++str; | |
900 | if (*fmt) { | |
f796937a | 901 | if (str < end) |
1da177e4 LT |
902 | *str = *fmt; |
903 | ++str; | |
904 | } else { | |
905 | --fmt; | |
906 | } | |
907 | continue; | |
908 | } | |
909 | if (qualifier == 'L') | |
910 | num = va_arg(args, long long); | |
911 | else if (qualifier == 'l') { | |
912 | num = va_arg(args, unsigned long); | |
913 | if (flags & SIGN) | |
914 | num = (signed long) num; | |
915 | } else if (qualifier == 'Z' || qualifier == 'z') { | |
916 | num = va_arg(args, size_t); | |
80322306 AV |
917 | } else if (qualifier == 't') { |
918 | num = va_arg(args, ptrdiff_t); | |
1da177e4 LT |
919 | } else if (qualifier == 'h') { |
920 | num = (unsigned short) va_arg(args, int); | |
921 | if (flags & SIGN) | |
922 | num = (signed short) num; | |
923 | } else { | |
924 | num = va_arg(args, unsigned int); | |
925 | if (flags & SIGN) | |
926 | num = (signed int) num; | |
927 | } | |
928 | str = number(str, end, num, base, | |
929 | field_width, precision, flags); | |
930 | } | |
f796937a JF |
931 | if (size > 0) { |
932 | if (str < end) | |
933 | *str = '\0'; | |
934 | else | |
0a6047ee | 935 | end[-1] = '\0'; |
f796937a JF |
936 | } |
937 | /* the trailing null byte doesn't count towards the total */ | |
1da177e4 LT |
938 | return str-buf; |
939 | } | |
1da177e4 LT |
940 | EXPORT_SYMBOL(vsnprintf); |
941 | ||
942 | /** | |
943 | * vscnprintf - Format a string and place it in a buffer | |
944 | * @buf: The buffer to place the result into | |
945 | * @size: The size of the buffer, including the trailing null space | |
946 | * @fmt: The format string to use | |
947 | * @args: Arguments for the format string | |
948 | * | |
949 | * The return value is the number of characters which have been written into | |
950 | * the @buf not including the trailing '\0'. If @size is <= 0 the function | |
951 | * returns 0. | |
952 | * | |
953 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 954 | * You probably want scnprintf() instead. |
20036fdc AK |
955 | * |
956 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
957 | */ |
958 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
959 | { | |
960 | int i; | |
961 | ||
962 | i=vsnprintf(buf,size,fmt,args); | |
963 | return (i >= size) ? (size - 1) : i; | |
964 | } | |
1da177e4 LT |
965 | EXPORT_SYMBOL(vscnprintf); |
966 | ||
967 | /** | |
968 | * snprintf - Format a string and place it in a buffer | |
969 | * @buf: The buffer to place the result into | |
970 | * @size: The size of the buffer, including the trailing null space | |
971 | * @fmt: The format string to use | |
972 | * @...: Arguments for the format string | |
973 | * | |
974 | * The return value is the number of characters which would be | |
975 | * generated for the given input, excluding the trailing null, | |
976 | * as per ISO C99. If the return is greater than or equal to | |
977 | * @size, the resulting string is truncated. | |
20036fdc AK |
978 | * |
979 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
980 | */ |
981 | int snprintf(char * buf, size_t size, const char *fmt, ...) | |
982 | { | |
983 | va_list args; | |
984 | int i; | |
985 | ||
986 | va_start(args, fmt); | |
987 | i=vsnprintf(buf,size,fmt,args); | |
988 | va_end(args); | |
989 | return i; | |
990 | } | |
1da177e4 LT |
991 | EXPORT_SYMBOL(snprintf); |
992 | ||
993 | /** | |
994 | * scnprintf - Format a string and place it in a buffer | |
995 | * @buf: The buffer to place the result into | |
996 | * @size: The size of the buffer, including the trailing null space | |
997 | * @fmt: The format string to use | |
998 | * @...: Arguments for the format string | |
999 | * | |
1000 | * The return value is the number of characters written into @buf not including | |
ea6f3281 | 1001 | * the trailing '\0'. If @size is <= 0 the function returns 0. |
1da177e4 LT |
1002 | */ |
1003 | ||
1004 | int scnprintf(char * buf, size_t size, const char *fmt, ...) | |
1005 | { | |
1006 | va_list args; | |
1007 | int i; | |
1008 | ||
1009 | va_start(args, fmt); | |
1010 | i = vsnprintf(buf, size, fmt, args); | |
1011 | va_end(args); | |
1012 | return (i >= size) ? (size - 1) : i; | |
1013 | } | |
1014 | EXPORT_SYMBOL(scnprintf); | |
1015 | ||
1016 | /** | |
1017 | * vsprintf - Format a string and place it in a buffer | |
1018 | * @buf: The buffer to place the result into | |
1019 | * @fmt: The format string to use | |
1020 | * @args: Arguments for the format string | |
1021 | * | |
1022 | * The function returns the number of characters written | |
72fd4a35 | 1023 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1024 | * buffer overflows. |
1025 | * | |
1026 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1027 | * You probably want sprintf() instead. |
20036fdc AK |
1028 | * |
1029 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1030 | */ |
1031 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1032 | { | |
1033 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1034 | } | |
1da177e4 LT |
1035 | EXPORT_SYMBOL(vsprintf); |
1036 | ||
1037 | /** | |
1038 | * sprintf - Format a string and place it in a buffer | |
1039 | * @buf: The buffer to place the result into | |
1040 | * @fmt: The format string to use | |
1041 | * @...: Arguments for the format string | |
1042 | * | |
1043 | * The function returns the number of characters written | |
72fd4a35 | 1044 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1045 | * buffer overflows. |
20036fdc AK |
1046 | * |
1047 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1048 | */ |
1049 | int sprintf(char * buf, const char *fmt, ...) | |
1050 | { | |
1051 | va_list args; | |
1052 | int i; | |
1053 | ||
1054 | va_start(args, fmt); | |
1055 | i=vsnprintf(buf, INT_MAX, fmt, args); | |
1056 | va_end(args); | |
1057 | return i; | |
1058 | } | |
1da177e4 LT |
1059 | EXPORT_SYMBOL(sprintf); |
1060 | ||
1061 | /** | |
1062 | * vsscanf - Unformat a buffer into a list of arguments | |
1063 | * @buf: input buffer | |
1064 | * @fmt: format of buffer | |
1065 | * @args: arguments | |
1066 | */ | |
1067 | int vsscanf(const char * buf, const char * fmt, va_list args) | |
1068 | { | |
1069 | const char *str = buf; | |
1070 | char *next; | |
1071 | char digit; | |
1072 | int num = 0; | |
1073 | int qualifier; | |
1074 | int base; | |
1075 | int field_width; | |
1076 | int is_sign = 0; | |
1077 | ||
1078 | while(*fmt && *str) { | |
1079 | /* skip any white space in format */ | |
1080 | /* white space in format matchs any amount of | |
1081 | * white space, including none, in the input. | |
1082 | */ | |
1083 | if (isspace(*fmt)) { | |
1084 | while (isspace(*fmt)) | |
1085 | ++fmt; | |
1086 | while (isspace(*str)) | |
1087 | ++str; | |
1088 | } | |
1089 | ||
1090 | /* anything that is not a conversion must match exactly */ | |
1091 | if (*fmt != '%' && *fmt) { | |
1092 | if (*fmt++ != *str++) | |
1093 | break; | |
1094 | continue; | |
1095 | } | |
1096 | ||
1097 | if (!*fmt) | |
1098 | break; | |
1099 | ++fmt; | |
1100 | ||
1101 | /* skip this conversion. | |
1102 | * advance both strings to next white space | |
1103 | */ | |
1104 | if (*fmt == '*') { | |
1105 | while (!isspace(*fmt) && *fmt) | |
1106 | fmt++; | |
1107 | while (!isspace(*str) && *str) | |
1108 | str++; | |
1109 | continue; | |
1110 | } | |
1111 | ||
1112 | /* get field width */ | |
1113 | field_width = -1; | |
1114 | if (isdigit(*fmt)) | |
1115 | field_width = skip_atoi(&fmt); | |
1116 | ||
1117 | /* get conversion qualifier */ | |
1118 | qualifier = -1; | |
1119 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || | |
1120 | *fmt == 'Z' || *fmt == 'z') { | |
1121 | qualifier = *fmt++; | |
1122 | if (unlikely(qualifier == *fmt)) { | |
1123 | if (qualifier == 'h') { | |
1124 | qualifier = 'H'; | |
1125 | fmt++; | |
1126 | } else if (qualifier == 'l') { | |
1127 | qualifier = 'L'; | |
1128 | fmt++; | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | base = 10; | |
1133 | is_sign = 0; | |
1134 | ||
1135 | if (!*fmt || !*str) | |
1136 | break; | |
1137 | ||
1138 | switch(*fmt++) { | |
1139 | case 'c': | |
1140 | { | |
1141 | char *s = (char *) va_arg(args,char*); | |
1142 | if (field_width == -1) | |
1143 | field_width = 1; | |
1144 | do { | |
1145 | *s++ = *str++; | |
1146 | } while (--field_width > 0 && *str); | |
1147 | num++; | |
1148 | } | |
1149 | continue; | |
1150 | case 's': | |
1151 | { | |
1152 | char *s = (char *) va_arg(args, char *); | |
1153 | if(field_width == -1) | |
1154 | field_width = INT_MAX; | |
1155 | /* first, skip leading white space in buffer */ | |
1156 | while (isspace(*str)) | |
1157 | str++; | |
1158 | ||
1159 | /* now copy until next white space */ | |
1160 | while (*str && !isspace(*str) && field_width--) { | |
1161 | *s++ = *str++; | |
1162 | } | |
1163 | *s = '\0'; | |
1164 | num++; | |
1165 | } | |
1166 | continue; | |
1167 | case 'n': | |
1168 | /* return number of characters read so far */ | |
1169 | { | |
1170 | int *i = (int *)va_arg(args,int*); | |
1171 | *i = str - buf; | |
1172 | } | |
1173 | continue; | |
1174 | case 'o': | |
1175 | base = 8; | |
1176 | break; | |
1177 | case 'x': | |
1178 | case 'X': | |
1179 | base = 16; | |
1180 | break; | |
1181 | case 'i': | |
1182 | base = 0; | |
1183 | case 'd': | |
1184 | is_sign = 1; | |
1185 | case 'u': | |
1186 | break; | |
1187 | case '%': | |
1188 | /* looking for '%' in str */ | |
1189 | if (*str++ != '%') | |
1190 | return num; | |
1191 | continue; | |
1192 | default: | |
1193 | /* invalid format; stop here */ | |
1194 | return num; | |
1195 | } | |
1196 | ||
1197 | /* have some sort of integer conversion. | |
1198 | * first, skip white space in buffer. | |
1199 | */ | |
1200 | while (isspace(*str)) | |
1201 | str++; | |
1202 | ||
1203 | digit = *str; | |
1204 | if (is_sign && digit == '-') | |
1205 | digit = *(str + 1); | |
1206 | ||
1207 | if (!digit | |
1208 | || (base == 16 && !isxdigit(digit)) | |
1209 | || (base == 10 && !isdigit(digit)) | |
1210 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
1211 | || (base == 0 && !isdigit(digit))) | |
1212 | break; | |
1213 | ||
1214 | switch(qualifier) { | |
1215 | case 'H': /* that's 'hh' in format */ | |
1216 | if (is_sign) { | |
1217 | signed char *s = (signed char *) va_arg(args,signed char *); | |
1218 | *s = (signed char) simple_strtol(str,&next,base); | |
1219 | } else { | |
1220 | unsigned char *s = (unsigned char *) va_arg(args, unsigned char *); | |
1221 | *s = (unsigned char) simple_strtoul(str, &next, base); | |
1222 | } | |
1223 | break; | |
1224 | case 'h': | |
1225 | if (is_sign) { | |
1226 | short *s = (short *) va_arg(args,short *); | |
1227 | *s = (short) simple_strtol(str,&next,base); | |
1228 | } else { | |
1229 | unsigned short *s = (unsigned short *) va_arg(args, unsigned short *); | |
1230 | *s = (unsigned short) simple_strtoul(str, &next, base); | |
1231 | } | |
1232 | break; | |
1233 | case 'l': | |
1234 | if (is_sign) { | |
1235 | long *l = (long *) va_arg(args,long *); | |
1236 | *l = simple_strtol(str,&next,base); | |
1237 | } else { | |
1238 | unsigned long *l = (unsigned long*) va_arg(args,unsigned long*); | |
1239 | *l = simple_strtoul(str,&next,base); | |
1240 | } | |
1241 | break; | |
1242 | case 'L': | |
1243 | if (is_sign) { | |
1244 | long long *l = (long long*) va_arg(args,long long *); | |
1245 | *l = simple_strtoll(str,&next,base); | |
1246 | } else { | |
1247 | unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*); | |
1248 | *l = simple_strtoull(str,&next,base); | |
1249 | } | |
1250 | break; | |
1251 | case 'Z': | |
1252 | case 'z': | |
1253 | { | |
1254 | size_t *s = (size_t*) va_arg(args,size_t*); | |
1255 | *s = (size_t) simple_strtoul(str,&next,base); | |
1256 | } | |
1257 | break; | |
1258 | default: | |
1259 | if (is_sign) { | |
1260 | int *i = (int *) va_arg(args, int*); | |
1261 | *i = (int) simple_strtol(str,&next,base); | |
1262 | } else { | |
1263 | unsigned int *i = (unsigned int*) va_arg(args, unsigned int*); | |
1264 | *i = (unsigned int) simple_strtoul(str,&next,base); | |
1265 | } | |
1266 | break; | |
1267 | } | |
1268 | num++; | |
1269 | ||
1270 | if (!next) | |
1271 | break; | |
1272 | str = next; | |
1273 | } | |
c6b40d16 JB |
1274 | |
1275 | /* | |
1276 | * Now we've come all the way through so either the input string or the | |
1277 | * format ended. In the former case, there can be a %n at the current | |
1278 | * position in the format that needs to be filled. | |
1279 | */ | |
1280 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
1281 | int *p = (int *)va_arg(args, int *); | |
1282 | *p = str - buf; | |
1283 | } | |
1284 | ||
1da177e4 LT |
1285 | return num; |
1286 | } | |
1da177e4 LT |
1287 | EXPORT_SYMBOL(vsscanf); |
1288 | ||
1289 | /** | |
1290 | * sscanf - Unformat a buffer into a list of arguments | |
1291 | * @buf: input buffer | |
1292 | * @fmt: formatting of buffer | |
1293 | * @...: resulting arguments | |
1294 | */ | |
1295 | int sscanf(const char * buf, const char * fmt, ...) | |
1296 | { | |
1297 | va_list args; | |
1298 | int i; | |
1299 | ||
1300 | va_start(args,fmt); | |
1301 | i = vsscanf(buf,fmt,args); | |
1302 | va_end(args); | |
1303 | return i; | |
1304 | } | |
1da177e4 | 1305 | EXPORT_SYMBOL(sscanf); |