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 LT |
120 | } |
121 | ||
06b2a76d YY |
122 | /** |
123 | * strict_strtoul - convert a string to an unsigned long strictly | |
124 | * @cp: The string to be converted | |
125 | * @base: The number base to use | |
126 | * @res: The converted result value | |
127 | * | |
128 | * strict_strtoul converts a string to an unsigned long only if the | |
129 | * string is really an unsigned long string, any string containing | |
130 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
131 | * only a newline char at the tail is acceptible because people generally | |
132 | * change a module parameter in the following way: | |
133 | * | |
134 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
135 | * | |
136 | * echo will append a newline to the tail. | |
137 | * | |
138 | * It returns 0 if conversion is successful and *res is set to the converted | |
139 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
140 | * | |
141 | * simple_strtoul just ignores the successive invalid characters and | |
142 | * return the converted value of prefix part of the string. | |
143 | */ | |
9d85db22 HH |
144 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
145 | { | |
146 | char *tail; | |
147 | unsigned long val; | |
148 | size_t len; | |
149 | ||
150 | *res = 0; | |
151 | len = strlen(cp); | |
152 | if (len == 0) | |
153 | return -EINVAL; | |
154 | ||
155 | val = simple_strtoul(cp, &tail, base); | |
e899aa82 PM |
156 | if (tail == cp) |
157 | return -EINVAL; | |
7b9186f5 | 158 | |
9d85db22 HH |
159 | if ((*tail == '\0') || |
160 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
161 | *res = val; | |
162 | return 0; | |
163 | } | |
164 | ||
165 | return -EINVAL; | |
166 | } | |
167 | EXPORT_SYMBOL(strict_strtoul); | |
06b2a76d YY |
168 | |
169 | /** | |
170 | * strict_strtol - convert a string to a long strictly | |
171 | * @cp: The string to be converted | |
172 | * @base: The number base to use | |
173 | * @res: The converted result value | |
174 | * | |
175 | * strict_strtol is similiar to strict_strtoul, but it allows the first | |
176 | * character of a string is '-'. | |
177 | * | |
178 | * It returns 0 if conversion is successful and *res is set to the converted | |
179 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
180 | */ | |
9d85db22 HH |
181 | int strict_strtol(const char *cp, unsigned int base, long *res) |
182 | { | |
183 | int ret; | |
184 | if (*cp == '-') { | |
185 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); | |
186 | if (!ret) | |
187 | *res = -(*res); | |
188 | } else { | |
189 | ret = strict_strtoul(cp, base, (unsigned long *)res); | |
190 | } | |
191 | ||
192 | return ret; | |
193 | } | |
194 | EXPORT_SYMBOL(strict_strtol); | |
06b2a76d YY |
195 | |
196 | /** | |
197 | * strict_strtoull - convert a string to an unsigned long long strictly | |
198 | * @cp: The string to be converted | |
199 | * @base: The number base to use | |
200 | * @res: The converted result value | |
201 | * | |
202 | * strict_strtoull converts a string to an unsigned long long only if the | |
203 | * string is really an unsigned long long string, any string containing | |
204 | * any invalid char at the tail will be rejected and -EINVAL is returned, | |
205 | * only a newline char at the tail is acceptible because people generally | |
206 | * change a module parameter in the following way: | |
207 | * | |
208 | * echo 1024 > /sys/module/e1000/parameters/copybreak | |
209 | * | |
210 | * echo will append a newline to the tail of the string. | |
211 | * | |
212 | * It returns 0 if conversion is successful and *res is set to the converted | |
213 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
214 | * | |
215 | * simple_strtoull just ignores the successive invalid characters and | |
216 | * return the converted value of prefix part of the string. | |
217 | */ | |
9d85db22 HH |
218 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
219 | { | |
220 | char *tail; | |
221 | unsigned long long val; | |
222 | size_t len; | |
223 | ||
224 | *res = 0; | |
225 | len = strlen(cp); | |
226 | if (len == 0) | |
227 | return -EINVAL; | |
228 | ||
229 | val = simple_strtoull(cp, &tail, base); | |
e899aa82 PM |
230 | if (tail == cp) |
231 | return -EINVAL; | |
9d85db22 HH |
232 | if ((*tail == '\0') || |
233 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
234 | *res = val; | |
235 | return 0; | |
236 | } | |
237 | ||
238 | return -EINVAL; | |
239 | } | |
240 | EXPORT_SYMBOL(strict_strtoull); | |
06b2a76d YY |
241 | |
242 | /** | |
243 | * strict_strtoll - convert a string to a long long strictly | |
244 | * @cp: The string to be converted | |
245 | * @base: The number base to use | |
246 | * @res: The converted result value | |
247 | * | |
248 | * strict_strtoll is similiar to strict_strtoull, but it allows the first | |
249 | * character of a string is '-'. | |
250 | * | |
251 | * It returns 0 if conversion is successful and *res is set to the converted | |
252 | * value, otherwise it returns -EINVAL and *res is set to 0. | |
253 | */ | |
9d85db22 HH |
254 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
255 | { | |
256 | int ret; | |
257 | if (*cp == '-') { | |
258 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); | |
259 | if (!ret) | |
260 | *res = -(*res); | |
261 | } else { | |
262 | ret = strict_strtoull(cp, base, (unsigned long long *)res); | |
263 | } | |
06b2a76d | 264 | |
9d85db22 HH |
265 | return ret; |
266 | } | |
06b2a76d | 267 | EXPORT_SYMBOL(strict_strtoll); |
06b2a76d | 268 | |
1da177e4 LT |
269 | static int skip_atoi(const char **s) |
270 | { | |
7b9186f5 | 271 | int i = 0; |
1da177e4 LT |
272 | |
273 | while (isdigit(**s)) | |
274 | i = i*10 + *((*s)++) - '0'; | |
7b9186f5 | 275 | |
1da177e4 LT |
276 | return i; |
277 | } | |
278 | ||
4277eedd DV |
279 | /* Decimal conversion is by far the most typical, and is used |
280 | * for /proc and /sys data. This directly impacts e.g. top performance | |
281 | * with many processes running. We optimize it for speed | |
282 | * using code from | |
283 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
284 | * (with permission from the author, Douglas W. Jones). */ | |
285 | ||
286 | /* Formats correctly any integer in [0,99999]. | |
287 | * Outputs from one to five digits depending on input. | |
288 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
7b9186f5 | 289 | static char *put_dec_trunc(char *buf, unsigned q) |
4277eedd DV |
290 | { |
291 | unsigned d3, d2, d1, d0; | |
292 | d1 = (q>>4) & 0xf; | |
293 | d2 = (q>>8) & 0xf; | |
294 | d3 = (q>>12); | |
295 | ||
296 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
297 | q = (d0 * 0xcd) >> 11; | |
298 | d0 = d0 - 10*q; | |
299 | *buf++ = d0 + '0'; /* least significant digit */ | |
300 | d1 = q + 9*d3 + 5*d2 + d1; | |
301 | if (d1 != 0) { | |
302 | q = (d1 * 0xcd) >> 11; | |
303 | d1 = d1 - 10*q; | |
304 | *buf++ = d1 + '0'; /* next digit */ | |
305 | ||
306 | d2 = q + 2*d2; | |
307 | if ((d2 != 0) || (d3 != 0)) { | |
308 | q = (d2 * 0xd) >> 7; | |
309 | d2 = d2 - 10*q; | |
310 | *buf++ = d2 + '0'; /* next digit */ | |
311 | ||
312 | d3 = q + 4*d3; | |
313 | if (d3 != 0) { | |
314 | q = (d3 * 0xcd) >> 11; | |
315 | d3 = d3 - 10*q; | |
316 | *buf++ = d3 + '0'; /* next digit */ | |
317 | if (q != 0) | |
7b9186f5 | 318 | *buf++ = q + '0'; /* most sign. digit */ |
4277eedd DV |
319 | } |
320 | } | |
321 | } | |
7b9186f5 | 322 | |
4277eedd DV |
323 | return buf; |
324 | } | |
325 | /* Same with if's removed. Always emits five digits */ | |
7b9186f5 | 326 | static char *put_dec_full(char *buf, unsigned q) |
4277eedd DV |
327 | { |
328 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
329 | /* but anyway, gcc produces better code with full-sized ints */ | |
330 | unsigned d3, d2, d1, d0; | |
331 | d1 = (q>>4) & 0xf; | |
332 | d2 = (q>>8) & 0xf; | |
333 | d3 = (q>>12); | |
334 | ||
7b9186f5 AGR |
335 | /* |
336 | * Possible ways to approx. divide by 10 | |
337 | * gcc -O2 replaces multiply with shifts and adds | |
338 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
339 | * (x * 0x67) >> 10: 1100111 | |
340 | * (x * 0x34) >> 9: 110100 - same | |
341 | * (x * 0x1a) >> 8: 11010 - same | |
342 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
343 | */ | |
4277eedd DV |
344 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
345 | q = (d0 * 0xcd) >> 11; | |
346 | d0 = d0 - 10*q; | |
347 | *buf++ = d0 + '0'; | |
348 | d1 = q + 9*d3 + 5*d2 + d1; | |
349 | q = (d1 * 0xcd) >> 11; | |
350 | d1 = d1 - 10*q; | |
351 | *buf++ = d1 + '0'; | |
352 | ||
353 | d2 = q + 2*d2; | |
354 | q = (d2 * 0xd) >> 7; | |
355 | d2 = d2 - 10*q; | |
356 | *buf++ = d2 + '0'; | |
357 | ||
358 | d3 = q + 4*d3; | |
359 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
360 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
361 | d3 = d3 - 10*q; | |
362 | *buf++ = d3 + '0'; | |
363 | *buf++ = q + '0'; | |
7b9186f5 | 364 | |
4277eedd DV |
365 | return buf; |
366 | } | |
367 | /* No inlining helps gcc to use registers better */ | |
7b9186f5 | 368 | static noinline char *put_dec(char *buf, unsigned long long num) |
4277eedd DV |
369 | { |
370 | while (1) { | |
371 | unsigned rem; | |
372 | if (num < 100000) | |
373 | return put_dec_trunc(buf, num); | |
374 | rem = do_div(num, 100000); | |
375 | buf = put_dec_full(buf, rem); | |
376 | } | |
377 | } | |
378 | ||
1da177e4 LT |
379 | #define ZEROPAD 1 /* pad with zero */ |
380 | #define SIGN 2 /* unsigned/signed long */ | |
381 | #define PLUS 4 /* show plus */ | |
382 | #define SPACE 8 /* space if plus */ | |
383 | #define LEFT 16 /* left justified */ | |
9b706aee DV |
384 | #define SMALL 32 /* Must be 32 == 0x20 */ |
385 | #define SPECIAL 64 /* 0x */ | |
1da177e4 | 386 | |
fef20d9c FW |
387 | enum format_type { |
388 | FORMAT_TYPE_NONE, /* Just a string part */ | |
ed681a91 | 389 | FORMAT_TYPE_WIDTH, |
fef20d9c FW |
390 | FORMAT_TYPE_PRECISION, |
391 | FORMAT_TYPE_CHAR, | |
392 | FORMAT_TYPE_STR, | |
393 | FORMAT_TYPE_PTR, | |
394 | FORMAT_TYPE_PERCENT_CHAR, | |
395 | FORMAT_TYPE_INVALID, | |
396 | FORMAT_TYPE_LONG_LONG, | |
397 | FORMAT_TYPE_ULONG, | |
398 | FORMAT_TYPE_LONG, | |
a4e94ef0 Z |
399 | FORMAT_TYPE_UBYTE, |
400 | FORMAT_TYPE_BYTE, | |
fef20d9c FW |
401 | FORMAT_TYPE_USHORT, |
402 | FORMAT_TYPE_SHORT, | |
403 | FORMAT_TYPE_UINT, | |
404 | FORMAT_TYPE_INT, | |
405 | FORMAT_TYPE_NRCHARS, | |
406 | FORMAT_TYPE_SIZE_T, | |
407 | FORMAT_TYPE_PTRDIFF | |
408 | }; | |
409 | ||
410 | struct printf_spec { | |
411 | enum format_type type; | |
412 | int flags; /* flags to number() */ | |
413 | int field_width; /* width of output field */ | |
414 | int base; | |
415 | int precision; /* # of digits/chars */ | |
416 | int qualifier; | |
417 | }; | |
418 | ||
419 | static 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 | ||
0f4f81dc | 539 | static char *string(char *buf, char *end, const char *s, struct printf_spec spec) |
0f9bfa56 LT |
540 | { |
541 | int len, i; | |
542 | ||
543 | if ((unsigned long)s < PAGE_SIZE) | |
0f4f81dc | 544 | s = "(null)"; |
0f9bfa56 | 545 | |
fef20d9c | 546 | len = strnlen(s, spec.precision); |
0f9bfa56 | 547 | |
fef20d9c FW |
548 | if (!(spec.flags & LEFT)) { |
549 | while (len < spec.field_width--) { | |
0f9bfa56 LT |
550 | if (buf < end) |
551 | *buf = ' '; | |
552 | ++buf; | |
553 | } | |
554 | } | |
555 | for (i = 0; i < len; ++i) { | |
556 | if (buf < end) | |
557 | *buf = *s; | |
558 | ++buf; ++s; | |
559 | } | |
fef20d9c | 560 | while (len < spec.field_width--) { |
0f9bfa56 LT |
561 | if (buf < end) |
562 | *buf = ' '; | |
563 | ++buf; | |
564 | } | |
7b9186f5 | 565 | |
0f9bfa56 LT |
566 | return buf; |
567 | } | |
568 | ||
fef20d9c | 569 | static char *symbol_string(char *buf, char *end, void *ptr, |
0c8b946e | 570 | struct printf_spec spec, char ext) |
0fe1ef24 LT |
571 | { |
572 | unsigned long value = (unsigned long) ptr; | |
573 | #ifdef CONFIG_KALLSYMS | |
574 | char sym[KSYM_SYMBOL_LEN]; | |
91adcd2c | 575 | if (ext != 'f' && ext != 's') |
0c8b946e FW |
576 | sprint_symbol(sym, value); |
577 | else | |
578 | kallsyms_lookup(value, NULL, NULL, NULL, sym); | |
7b9186f5 | 579 | |
fef20d9c | 580 | return string(buf, end, sym, spec); |
0fe1ef24 | 581 | #else |
7b9186f5 | 582 | spec.field_width = 2 * sizeof(void *); |
fef20d9c FW |
583 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
584 | spec.base = 16; | |
7b9186f5 | 585 | |
fef20d9c | 586 | return number(buf, end, value, spec); |
0fe1ef24 LT |
587 | #endif |
588 | } | |
589 | ||
fef20d9c | 590 | static char *resource_string(char *buf, char *end, struct resource *res, |
fd95541e | 591 | struct printf_spec spec, const char *fmt) |
332d2e78 LT |
592 | { |
593 | #ifndef IO_RSRC_PRINTK_SIZE | |
28405372 | 594 | #define IO_RSRC_PRINTK_SIZE 6 |
332d2e78 LT |
595 | #endif |
596 | ||
597 | #ifndef MEM_RSRC_PRINTK_SIZE | |
28405372 | 598 | #define MEM_RSRC_PRINTK_SIZE 10 |
332d2e78 | 599 | #endif |
c91d3376 | 600 | struct printf_spec hex_spec = { |
fef20d9c FW |
601 | .base = 16, |
602 | .precision = -1, | |
603 | .flags = SPECIAL | SMALL | ZEROPAD, | |
604 | }; | |
c91d3376 BH |
605 | struct printf_spec dec_spec = { |
606 | .base = 10, | |
607 | .precision = -1, | |
608 | .flags = 0, | |
609 | }; | |
fd95541e BH |
610 | struct printf_spec str_spec = { |
611 | .field_width = -1, | |
612 | .precision = 10, | |
613 | .flags = LEFT, | |
614 | }; | |
615 | struct printf_spec flag_spec = { | |
616 | .base = 16, | |
617 | .precision = -1, | |
618 | .flags = SPECIAL | SMALL, | |
619 | }; | |
c7dabef8 BH |
620 | |
621 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
622 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
623 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
624 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
625 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]") | |
626 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") | |
627 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
628 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
629 | ||
332d2e78 | 630 | char *p = sym, *pend = sym + sizeof(sym); |
c91d3376 | 631 | int size = -1, addr = 0; |
c7dabef8 | 632 | int decode = (fmt[0] == 'R') ? 1 : 0; |
332d2e78 | 633 | |
c91d3376 | 634 | if (res->flags & IORESOURCE_IO) { |
332d2e78 | 635 | size = IO_RSRC_PRINTK_SIZE; |
c91d3376 BH |
636 | addr = 1; |
637 | } else if (res->flags & IORESOURCE_MEM) { | |
332d2e78 | 638 | size = MEM_RSRC_PRINTK_SIZE; |
c91d3376 BH |
639 | addr = 1; |
640 | } | |
332d2e78 LT |
641 | |
642 | *p++ = '['; | |
c7dabef8 BH |
643 | if (res->flags & IORESOURCE_IO) |
644 | p = string(p, pend, "io ", str_spec); | |
645 | else if (res->flags & IORESOURCE_MEM) | |
646 | p = string(p, pend, "mem ", str_spec); | |
647 | else if (res->flags & IORESOURCE_IRQ) | |
648 | p = string(p, pend, "irq ", str_spec); | |
649 | else if (res->flags & IORESOURCE_DMA) | |
650 | p = string(p, pend, "dma ", str_spec); | |
651 | else { | |
652 | p = string(p, pend, "??? ", str_spec); | |
653 | decode = 0; | |
fd95541e | 654 | } |
c91d3376 BH |
655 | hex_spec.field_width = size; |
656 | p = number(p, pend, res->start, addr ? hex_spec : dec_spec); | |
657 | if (res->start != res->end) { | |
658 | *p++ = '-'; | |
659 | p = number(p, pend, res->end, addr ? hex_spec : dec_spec); | |
660 | } | |
c7dabef8 | 661 | if (decode) { |
fd95541e BH |
662 | if (res->flags & IORESOURCE_MEM_64) |
663 | p = string(p, pend, " 64bit", str_spec); | |
664 | if (res->flags & IORESOURCE_PREFETCH) | |
665 | p = string(p, pend, " pref", str_spec); | |
666 | if (res->flags & IORESOURCE_DISABLED) | |
667 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
668 | } else { |
669 | p = string(p, pend, " flags ", str_spec); | |
670 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 671 | } |
332d2e78 | 672 | *p++ = ']'; |
c7dabef8 | 673 | *p = '\0'; |
332d2e78 | 674 | |
fef20d9c | 675 | return string(buf, end, sym, spec); |
332d2e78 LT |
676 | } |
677 | ||
fef20d9c | 678 | static char *mac_address_string(char *buf, char *end, u8 *addr, |
8a27f7c9 | 679 | struct printf_spec spec, const char *fmt) |
dd45c9cf | 680 | { |
8a27f7c9 | 681 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
682 | char *p = mac_addr; |
683 | int i; | |
bc7259a2 JP |
684 | char separator; |
685 | ||
686 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
687 | separator = '-'; |
688 | } else { | |
bc7259a2 JP |
689 | separator = ':'; |
690 | } | |
dd45c9cf HH |
691 | |
692 | for (i = 0; i < 6; i++) { | |
c8e00060 | 693 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 694 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 695 | *p++ = separator; |
dd45c9cf HH |
696 | } |
697 | *p = '\0'; | |
698 | ||
fef20d9c | 699 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
700 | } |
701 | ||
8a27f7c9 JP |
702 | static char *ip4_string(char *p, const u8 *addr, bool leading_zeros) |
703 | { | |
704 | int i; | |
705 | ||
706 | for (i = 0; i < 4; i++) { | |
707 | char temp[3]; /* hold each IP quad in reverse order */ | |
708 | int digits = put_dec_trunc(temp, addr[i]) - temp; | |
709 | if (leading_zeros) { | |
710 | if (digits < 3) | |
711 | *p++ = '0'; | |
712 | if (digits < 2) | |
713 | *p++ = '0'; | |
714 | } | |
715 | /* reverse the digits in the quad */ | |
716 | while (digits--) | |
717 | *p++ = temp[digits]; | |
718 | if (i < 3) | |
719 | *p++ = '.'; | |
720 | } | |
8a27f7c9 | 721 | *p = '\0'; |
7b9186f5 | 722 | |
8a27f7c9 JP |
723 | return p; |
724 | } | |
725 | ||
eb78cd26 | 726 | static char *ip6_compressed_string(char *p, const char *addr) |
689afa7d | 727 | { |
7b9186f5 | 728 | int i, j, range; |
8a27f7c9 JP |
729 | unsigned char zerolength[8]; |
730 | int longest = 1; | |
731 | int colonpos = -1; | |
732 | u16 word; | |
7b9186f5 | 733 | u8 hi, lo; |
8a27f7c9 | 734 | bool needcolon = false; |
eb78cd26 JP |
735 | bool useIPv4; |
736 | struct in6_addr in6; | |
737 | ||
738 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
739 | ||
740 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
741 | |
742 | memset(zerolength, 0, sizeof(zerolength)); | |
743 | ||
744 | if (useIPv4) | |
745 | range = 6; | |
746 | else | |
747 | range = 8; | |
748 | ||
749 | /* find position of longest 0 run */ | |
750 | for (i = 0; i < range; i++) { | |
751 | for (j = i; j < range; j++) { | |
eb78cd26 | 752 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
753 | break; |
754 | zerolength[i]++; | |
755 | } | |
756 | } | |
757 | for (i = 0; i < range; i++) { | |
758 | if (zerolength[i] > longest) { | |
759 | longest = zerolength[i]; | |
760 | colonpos = i; | |
761 | } | |
762 | } | |
689afa7d | 763 | |
8a27f7c9 JP |
764 | /* emit address */ |
765 | for (i = 0; i < range; i++) { | |
766 | if (i == colonpos) { | |
767 | if (needcolon || i == 0) | |
768 | *p++ = ':'; | |
769 | *p++ = ':'; | |
770 | needcolon = false; | |
771 | i += longest - 1; | |
772 | continue; | |
773 | } | |
774 | if (needcolon) { | |
775 | *p++ = ':'; | |
776 | needcolon = false; | |
777 | } | |
778 | /* hex u16 without leading 0s */ | |
eb78cd26 | 779 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
780 | hi = word >> 8; |
781 | lo = word & 0xff; | |
782 | if (hi) { | |
783 | if (hi > 0x0f) | |
784 | p = pack_hex_byte(p, hi); | |
785 | else | |
786 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 787 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 788 | } |
b5ff992b | 789 | else if (lo > 0x0f) |
8a27f7c9 JP |
790 | p = pack_hex_byte(p, lo); |
791 | else | |
792 | *p++ = hex_asc_lo(lo); | |
793 | needcolon = true; | |
794 | } | |
795 | ||
796 | if (useIPv4) { | |
797 | if (needcolon) | |
798 | *p++ = ':'; | |
eb78cd26 | 799 | p = ip4_string(p, &in6.s6_addr[12], false); |
8a27f7c9 | 800 | } |
8a27f7c9 | 801 | *p = '\0'; |
7b9186f5 | 802 | |
8a27f7c9 JP |
803 | return p; |
804 | } | |
805 | ||
eb78cd26 | 806 | static char *ip6_string(char *p, const char *addr, const char *fmt) |
8a27f7c9 JP |
807 | { |
808 | int i; | |
7b9186f5 | 809 | |
689afa7d | 810 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
811 | p = pack_hex_byte(p, *addr++); |
812 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 813 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
814 | *p++ = ':'; |
815 | } | |
816 | *p = '\0'; | |
7b9186f5 | 817 | |
8a27f7c9 JP |
818 | return p; |
819 | } | |
820 | ||
821 | static char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
822 | struct printf_spec spec, const char *fmt) | |
823 | { | |
824 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
825 | ||
826 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 827 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 828 | else |
eb78cd26 | 829 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 830 | |
fef20d9c | 831 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
832 | } |
833 | ||
8a27f7c9 JP |
834 | static char *ip4_addr_string(char *buf, char *end, const u8 *addr, |
835 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 836 | { |
8a27f7c9 | 837 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 838 | |
8a27f7c9 | 839 | ip4_string(ip4_addr, addr, fmt[0] == 'i'); |
4aa99606 | 840 | |
fef20d9c | 841 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
842 | } |
843 | ||
9ac6e44e JP |
844 | static char *uuid_string(char *buf, char *end, const u8 *addr, |
845 | struct printf_spec spec, const char *fmt) | |
846 | { | |
847 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
848 | char *p = uuid; | |
849 | int i; | |
850 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
851 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
852 | const u8 *index = be; | |
853 | bool uc = false; | |
854 | ||
855 | switch (*(++fmt)) { | |
856 | case 'L': | |
857 | uc = true; /* fall-through */ | |
858 | case 'l': | |
859 | index = le; | |
860 | break; | |
861 | case 'B': | |
862 | uc = true; | |
863 | break; | |
864 | } | |
865 | ||
866 | for (i = 0; i < 16; i++) { | |
867 | p = pack_hex_byte(p, addr[index[i]]); | |
868 | switch (i) { | |
869 | case 3: | |
870 | case 5: | |
871 | case 7: | |
872 | case 9: | |
873 | *p++ = '-'; | |
874 | break; | |
875 | } | |
876 | } | |
877 | ||
878 | *p = 0; | |
879 | ||
880 | if (uc) { | |
881 | p = uuid; | |
882 | do { | |
883 | *p = toupper(*p); | |
884 | } while (*(++p)); | |
885 | } | |
886 | ||
887 | return string(buf, end, uuid, spec); | |
888 | } | |
889 | ||
4d8a743c LT |
890 | /* |
891 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
892 | * by an extra set of alphanumeric characters that are extended format | |
893 | * specifiers. | |
894 | * | |
332d2e78 LT |
895 | * Right now we handle: |
896 | * | |
0c8b946e FW |
897 | * - 'F' For symbolic function descriptor pointers with offset |
898 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
899 | * - 'S' For symbolic direct pointers with offset |
900 | * - 's' For symbolic direct pointers without offset | |
c7dabef8 BH |
901 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
902 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
903 | * - 'M' For a 6-byte MAC address, it prints the address in the |
904 | * usual colon-separated hex notation | |
8a27f7c9 | 905 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 906 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 907 | * with a dash-separated hex notation |
8a27f7c9 JP |
908 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
909 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
910 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
911 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
912 | * IPv6 omits the colons (01020304...0f) | |
913 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
914 | * - 'I6c' for IPv6 addresses printed as specified by | |
915 | * http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt | |
9ac6e44e JP |
916 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
917 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
918 | * Options for %pU are: | |
919 | * b big endian lower case hex (default) | |
920 | * B big endian UPPER case hex | |
921 | * l little endian lower case hex | |
922 | * L little endian UPPER case hex | |
923 | * big endian output byte order is: | |
924 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
925 | * little endian output byte order is: | |
926 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
927 | * | |
332d2e78 LT |
928 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
929 | * function pointers are really function descriptors, which contain a | |
930 | * pointer to the real address. | |
4d8a743c | 931 | */ |
fef20d9c FW |
932 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
933 | struct printf_spec spec) | |
78a8bf69 | 934 | { |
d97106ab | 935 | if (!ptr) |
fef20d9c | 936 | return string(buf, end, "(null)", spec); |
d97106ab | 937 | |
0fe1ef24 LT |
938 | switch (*fmt) { |
939 | case 'F': | |
0c8b946e | 940 | case 'f': |
0fe1ef24 LT |
941 | ptr = dereference_function_descriptor(ptr); |
942 | /* Fallthrough */ | |
943 | case 'S': | |
9ac6e44e | 944 | case 's': |
0c8b946e | 945 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 946 | case 'R': |
c7dabef8 | 947 | case 'r': |
fd95541e | 948 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
949 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
950 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 951 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
952 | return mac_address_string(buf, end, ptr, spec, fmt); |
953 | case 'I': /* Formatted IP supported | |
954 | * 4: 1.2.3.4 | |
955 | * 6: 0001:0203:...:0708 | |
956 | * 6c: 1::708 or 1::1.2.3.4 | |
957 | */ | |
958 | case 'i': /* Contiguous: | |
959 | * 4: 001.002.003.004 | |
960 | * 6: 000102...0f | |
961 | */ | |
962 | switch (fmt[1]) { | |
963 | case '6': | |
964 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
965 | case '4': | |
966 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
967 | } | |
fef20d9c | 968 | break; |
9ac6e44e JP |
969 | case 'U': |
970 | return uuid_string(buf, end, ptr, spec, fmt); | |
fef20d9c FW |
971 | } |
972 | spec.flags |= SMALL; | |
973 | if (spec.field_width == -1) { | |
974 | spec.field_width = 2*sizeof(void *); | |
975 | spec.flags |= ZEROPAD; | |
976 | } | |
977 | spec.base = 16; | |
978 | ||
979 | return number(buf, end, (unsigned long) ptr, spec); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Helper function to decode printf style format. | |
984 | * Each call decode a token from the format and return the | |
985 | * number of characters read (or likely the delta where it wants | |
986 | * to go on the next call). | |
987 | * The decoded token is returned through the parameters | |
988 | * | |
989 | * 'h', 'l', or 'L' for integer fields | |
990 | * 'z' support added 23/7/1999 S.H. | |
991 | * 'z' changed to 'Z' --davidm 1/25/99 | |
992 | * 't' added for ptrdiff_t | |
993 | * | |
994 | * @fmt: the format string | |
995 | * @type of the token returned | |
996 | * @flags: various flags such as +, -, # tokens.. | |
997 | * @field_width: overwritten width | |
998 | * @base: base of the number (octal, hex, ...) | |
999 | * @precision: precision of a number | |
1000 | * @qualifier: qualifier of a number (long, size_t, ...) | |
1001 | */ | |
1002 | static int format_decode(const char *fmt, struct printf_spec *spec) | |
1003 | { | |
1004 | const char *start = fmt; | |
fef20d9c FW |
1005 | |
1006 | /* we finished early by reading the field width */ | |
ed681a91 | 1007 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
1008 | if (spec->field_width < 0) { |
1009 | spec->field_width = -spec->field_width; | |
1010 | spec->flags |= LEFT; | |
1011 | } | |
1012 | spec->type = FORMAT_TYPE_NONE; | |
1013 | goto precision; | |
1014 | } | |
1015 | ||
1016 | /* we finished early by reading the precision */ | |
1017 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
1018 | if (spec->precision < 0) | |
1019 | spec->precision = 0; | |
1020 | ||
1021 | spec->type = FORMAT_TYPE_NONE; | |
1022 | goto qualifier; | |
1023 | } | |
1024 | ||
1025 | /* By default */ | |
1026 | spec->type = FORMAT_TYPE_NONE; | |
1027 | ||
1028 | for (; *fmt ; ++fmt) { | |
1029 | if (*fmt == '%') | |
1030 | break; | |
1031 | } | |
1032 | ||
1033 | /* Return the current non-format string */ | |
1034 | if (fmt != start || !*fmt) | |
1035 | return fmt - start; | |
1036 | ||
1037 | /* Process flags */ | |
1038 | spec->flags = 0; | |
1039 | ||
1040 | while (1) { /* this also skips first '%' */ | |
1041 | bool found = true; | |
1042 | ||
1043 | ++fmt; | |
1044 | ||
1045 | switch (*fmt) { | |
1046 | case '-': spec->flags |= LEFT; break; | |
1047 | case '+': spec->flags |= PLUS; break; | |
1048 | case ' ': spec->flags |= SPACE; break; | |
1049 | case '#': spec->flags |= SPECIAL; break; | |
1050 | case '0': spec->flags |= ZEROPAD; break; | |
1051 | default: found = false; | |
1052 | } | |
1053 | ||
1054 | if (!found) | |
1055 | break; | |
1056 | } | |
1057 | ||
1058 | /* get field width */ | |
1059 | spec->field_width = -1; | |
1060 | ||
1061 | if (isdigit(*fmt)) | |
1062 | spec->field_width = skip_atoi(&fmt); | |
1063 | else if (*fmt == '*') { | |
1064 | /* it's the next argument */ | |
ed681a91 | 1065 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1066 | return ++fmt - start; |
1067 | } | |
1068 | ||
1069 | precision: | |
1070 | /* get the precision */ | |
1071 | spec->precision = -1; | |
1072 | if (*fmt == '.') { | |
1073 | ++fmt; | |
1074 | if (isdigit(*fmt)) { | |
1075 | spec->precision = skip_atoi(&fmt); | |
1076 | if (spec->precision < 0) | |
1077 | spec->precision = 0; | |
1078 | } else if (*fmt == '*') { | |
1079 | /* it's the next argument */ | |
adf26f84 | 1080 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1081 | return ++fmt - start; |
1082 | } | |
1083 | } | |
1084 | ||
1085 | qualifier: | |
1086 | /* get the conversion qualifier */ | |
1087 | spec->qualifier = -1; | |
08562cb2 AGR |
1088 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1089 | TOLOWER(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1090 | spec->qualifier = *fmt++; |
1091 | if (unlikely(spec->qualifier == *fmt)) { | |
1092 | if (spec->qualifier == 'l') { | |
1093 | spec->qualifier = 'L'; | |
1094 | ++fmt; | |
1095 | } else if (spec->qualifier == 'h') { | |
1096 | spec->qualifier = 'H'; | |
1097 | ++fmt; | |
1098 | } | |
fef20d9c FW |
1099 | } |
1100 | } | |
1101 | ||
1102 | /* default base */ | |
1103 | spec->base = 10; | |
1104 | switch (*fmt) { | |
1105 | case 'c': | |
1106 | spec->type = FORMAT_TYPE_CHAR; | |
1107 | return ++fmt - start; | |
1108 | ||
1109 | case 's': | |
1110 | spec->type = FORMAT_TYPE_STR; | |
1111 | return ++fmt - start; | |
1112 | ||
1113 | case 'p': | |
1114 | spec->type = FORMAT_TYPE_PTR; | |
1115 | return fmt - start; | |
1116 | /* skip alnum */ | |
1117 | ||
1118 | case 'n': | |
1119 | spec->type = FORMAT_TYPE_NRCHARS; | |
1120 | return ++fmt - start; | |
1121 | ||
1122 | case '%': | |
1123 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1124 | return ++fmt - start; | |
1125 | ||
1126 | /* integer number formats - set up the flags and "break" */ | |
1127 | case 'o': | |
1128 | spec->base = 8; | |
1129 | break; | |
1130 | ||
1131 | case 'x': | |
1132 | spec->flags |= SMALL; | |
1133 | ||
1134 | case 'X': | |
1135 | spec->base = 16; | |
1136 | break; | |
1137 | ||
1138 | case 'd': | |
1139 | case 'i': | |
39e874f8 | 1140 | spec->flags |= SIGN; |
fef20d9c | 1141 | case 'u': |
4aa99606 | 1142 | break; |
fef20d9c FW |
1143 | |
1144 | default: | |
1145 | spec->type = FORMAT_TYPE_INVALID; | |
1146 | return fmt - start; | |
0fe1ef24 | 1147 | } |
fef20d9c FW |
1148 | |
1149 | if (spec->qualifier == 'L') | |
1150 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1151 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1152 | if (spec->flags & SIGN) |
fef20d9c FW |
1153 | spec->type = FORMAT_TYPE_LONG; |
1154 | else | |
1155 | spec->type = FORMAT_TYPE_ULONG; | |
08562cb2 | 1156 | } else if (TOLOWER(spec->qualifier) == 'z') { |
fef20d9c FW |
1157 | spec->type = FORMAT_TYPE_SIZE_T; |
1158 | } else if (spec->qualifier == 't') { | |
1159 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1160 | } else if (spec->qualifier == 'H') { |
1161 | if (spec->flags & SIGN) | |
1162 | spec->type = FORMAT_TYPE_BYTE; | |
1163 | else | |
1164 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1165 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1166 | if (spec->flags & SIGN) |
fef20d9c FW |
1167 | spec->type = FORMAT_TYPE_SHORT; |
1168 | else | |
1169 | spec->type = FORMAT_TYPE_USHORT; | |
1170 | } else { | |
39e874f8 | 1171 | if (spec->flags & SIGN) |
fef20d9c FW |
1172 | spec->type = FORMAT_TYPE_INT; |
1173 | else | |
1174 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1175 | } |
fef20d9c FW |
1176 | |
1177 | return ++fmt - start; | |
78a8bf69 LT |
1178 | } |
1179 | ||
1da177e4 LT |
1180 | /** |
1181 | * vsnprintf - Format a string and place it in a buffer | |
1182 | * @buf: The buffer to place the result into | |
1183 | * @size: The size of the buffer, including the trailing null space | |
1184 | * @fmt: The format string to use | |
1185 | * @args: Arguments for the format string | |
1186 | * | |
20036fdc | 1187 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1188 | * %pS output the name of a text symbol with offset |
1189 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1190 | * %pF output the name of a function pointer with its offset |
1191 | * %pf output the name of a function pointer without its offset | |
8a79503a UKK |
1192 | * %pR output the address range in a struct resource with decoded flags |
1193 | * %pr output the address range in a struct resource with raw flags | |
1194 | * %pM output a 6-byte MAC address with colons | |
1195 | * %pm output a 6-byte MAC address without colons | |
1196 | * %pI4 print an IPv4 address without leading zeros | |
1197 | * %pi4 print an IPv4 address with leading zeros | |
1198 | * %pI6 print an IPv6 address with colons | |
1199 | * %pi6 print an IPv6 address without colons | |
1200 | * %pI6c print an IPv6 address as specified by | |
1201 | * http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt | |
1202 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper | |
1203 | * case. | |
0efb4d20 | 1204 | * %n is ignored |
20036fdc | 1205 | * |
1da177e4 LT |
1206 | * The return value is the number of characters which would |
1207 | * be generated for the given input, excluding the trailing | |
1208 | * '\0', as per ISO C99. If you want to have the exact | |
1209 | * number of characters written into @buf as return value | |
72fd4a35 | 1210 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1211 | * return is greater than or equal to @size, the resulting |
1212 | * string is truncated. | |
1213 | * | |
1214 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1215 | * You probably want snprintf() instead. |
1da177e4 LT |
1216 | */ |
1217 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1218 | { | |
1da177e4 | 1219 | unsigned long long num; |
d4be151b | 1220 | char *str, *end; |
fef20d9c | 1221 | struct printf_spec spec = {0}; |
1da177e4 | 1222 | |
f796937a JF |
1223 | /* Reject out-of-range values early. Large positive sizes are |
1224 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1225 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1226 | return 0; |
1da177e4 LT |
1227 | |
1228 | str = buf; | |
f796937a | 1229 | end = buf + size; |
1da177e4 | 1230 | |
f796937a JF |
1231 | /* Make sure end is always >= buf */ |
1232 | if (end < buf) { | |
1233 | end = ((void *)-1); | |
1234 | size = end - buf; | |
1da177e4 LT |
1235 | } |
1236 | ||
fef20d9c FW |
1237 | while (*fmt) { |
1238 | const char *old_fmt = fmt; | |
d4be151b | 1239 | int read = format_decode(fmt, &spec); |
1da177e4 | 1240 | |
fef20d9c | 1241 | fmt += read; |
1da177e4 | 1242 | |
fef20d9c FW |
1243 | switch (spec.type) { |
1244 | case FORMAT_TYPE_NONE: { | |
1245 | int copy = read; | |
1246 | if (str < end) { | |
1247 | if (copy > end - str) | |
1248 | copy = end - str; | |
1249 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1250 | } |
fef20d9c FW |
1251 | str += read; |
1252 | break; | |
1da177e4 LT |
1253 | } |
1254 | ||
ed681a91 | 1255 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1256 | spec.field_width = va_arg(args, int); |
1257 | break; | |
1da177e4 | 1258 | |
fef20d9c FW |
1259 | case FORMAT_TYPE_PRECISION: |
1260 | spec.precision = va_arg(args, int); | |
1261 | break; | |
1da177e4 | 1262 | |
d4be151b AGR |
1263 | case FORMAT_TYPE_CHAR: { |
1264 | char c; | |
1265 | ||
fef20d9c FW |
1266 | if (!(spec.flags & LEFT)) { |
1267 | while (--spec.field_width > 0) { | |
f796937a | 1268 | if (str < end) |
1da177e4 LT |
1269 | *str = ' '; |
1270 | ++str; | |
1da177e4 | 1271 | |
fef20d9c FW |
1272 | } |
1273 | } | |
1274 | c = (unsigned char) va_arg(args, int); | |
1275 | if (str < end) | |
1276 | *str = c; | |
1277 | ++str; | |
1278 | while (--spec.field_width > 0) { | |
f796937a | 1279 | if (str < end) |
fef20d9c | 1280 | *str = ' '; |
1da177e4 | 1281 | ++str; |
fef20d9c FW |
1282 | } |
1283 | break; | |
d4be151b | 1284 | } |
1da177e4 | 1285 | |
fef20d9c FW |
1286 | case FORMAT_TYPE_STR: |
1287 | str = string(str, end, va_arg(args, char *), spec); | |
1288 | break; | |
1da177e4 | 1289 | |
fef20d9c FW |
1290 | case FORMAT_TYPE_PTR: |
1291 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1292 | spec); | |
1293 | while (isalnum(*fmt)) | |
1294 | fmt++; | |
1295 | break; | |
1da177e4 | 1296 | |
fef20d9c FW |
1297 | case FORMAT_TYPE_PERCENT_CHAR: |
1298 | if (str < end) | |
1299 | *str = '%'; | |
1300 | ++str; | |
1301 | break; | |
1da177e4 | 1302 | |
fef20d9c FW |
1303 | case FORMAT_TYPE_INVALID: |
1304 | if (str < end) | |
1305 | *str = '%'; | |
1306 | ++str; | |
fef20d9c FW |
1307 | break; |
1308 | ||
1309 | case FORMAT_TYPE_NRCHARS: { | |
1310 | int qualifier = spec.qualifier; | |
1311 | ||
1312 | if (qualifier == 'l') { | |
1313 | long *ip = va_arg(args, long *); | |
1314 | *ip = (str - buf); | |
08562cb2 | 1315 | } else if (TOLOWER(qualifier) == 'z') { |
fef20d9c FW |
1316 | size_t *ip = va_arg(args, size_t *); |
1317 | *ip = (str - buf); | |
1318 | } else { | |
1319 | int *ip = va_arg(args, int *); | |
1320 | *ip = (str - buf); | |
1321 | } | |
1322 | break; | |
1da177e4 | 1323 | } |
fef20d9c FW |
1324 | |
1325 | default: | |
1326 | switch (spec.type) { | |
1327 | case FORMAT_TYPE_LONG_LONG: | |
1328 | num = va_arg(args, long long); | |
1329 | break; | |
1330 | case FORMAT_TYPE_ULONG: | |
1331 | num = va_arg(args, unsigned long); | |
1332 | break; | |
1333 | case FORMAT_TYPE_LONG: | |
1334 | num = va_arg(args, long); | |
1335 | break; | |
1336 | case FORMAT_TYPE_SIZE_T: | |
1337 | num = va_arg(args, size_t); | |
1338 | break; | |
1339 | case FORMAT_TYPE_PTRDIFF: | |
1340 | num = va_arg(args, ptrdiff_t); | |
1341 | break; | |
a4e94ef0 Z |
1342 | case FORMAT_TYPE_UBYTE: |
1343 | num = (unsigned char) va_arg(args, int); | |
1344 | break; | |
1345 | case FORMAT_TYPE_BYTE: | |
1346 | num = (signed char) va_arg(args, int); | |
1347 | break; | |
fef20d9c FW |
1348 | case FORMAT_TYPE_USHORT: |
1349 | num = (unsigned short) va_arg(args, int); | |
1350 | break; | |
1351 | case FORMAT_TYPE_SHORT: | |
1352 | num = (short) va_arg(args, int); | |
1353 | break; | |
39e874f8 FW |
1354 | case FORMAT_TYPE_INT: |
1355 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1356 | break; |
1357 | default: | |
1358 | num = va_arg(args, unsigned int); | |
1359 | } | |
1360 | ||
1361 | str = number(str, end, num, spec); | |
1da177e4 | 1362 | } |
1da177e4 | 1363 | } |
fef20d9c | 1364 | |
f796937a JF |
1365 | if (size > 0) { |
1366 | if (str < end) | |
1367 | *str = '\0'; | |
1368 | else | |
0a6047ee | 1369 | end[-1] = '\0'; |
f796937a | 1370 | } |
fef20d9c | 1371 | |
f796937a | 1372 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1373 | return str-buf; |
fef20d9c | 1374 | |
1da177e4 | 1375 | } |
1da177e4 LT |
1376 | EXPORT_SYMBOL(vsnprintf); |
1377 | ||
1378 | /** | |
1379 | * vscnprintf - Format a string and place it in a buffer | |
1380 | * @buf: The buffer to place the result into | |
1381 | * @size: The size of the buffer, including the trailing null space | |
1382 | * @fmt: The format string to use | |
1383 | * @args: Arguments for the format string | |
1384 | * | |
1385 | * The return value is the number of characters which have been written into | |
1386 | * the @buf not including the trailing '\0'. If @size is <= 0 the function | |
1387 | * returns 0. | |
1388 | * | |
1389 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1390 | * You probably want scnprintf() instead. |
20036fdc AK |
1391 | * |
1392 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1393 | */ |
1394 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1395 | { | |
1396 | int i; | |
1397 | ||
7b9186f5 AGR |
1398 | i = vsnprintf(buf, size, fmt, args); |
1399 | ||
1da177e4 LT |
1400 | return (i >= size) ? (size - 1) : i; |
1401 | } | |
1da177e4 LT |
1402 | EXPORT_SYMBOL(vscnprintf); |
1403 | ||
1404 | /** | |
1405 | * snprintf - Format a string and place it in a buffer | |
1406 | * @buf: The buffer to place the result into | |
1407 | * @size: The size of the buffer, including the trailing null space | |
1408 | * @fmt: The format string to use | |
1409 | * @...: Arguments for the format string | |
1410 | * | |
1411 | * The return value is the number of characters which would be | |
1412 | * generated for the given input, excluding the trailing null, | |
1413 | * as per ISO C99. If the return is greater than or equal to | |
1414 | * @size, the resulting string is truncated. | |
20036fdc AK |
1415 | * |
1416 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1417 | */ |
7b9186f5 | 1418 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1419 | { |
1420 | va_list args; | |
1421 | int i; | |
1422 | ||
1423 | va_start(args, fmt); | |
7b9186f5 | 1424 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1425 | va_end(args); |
7b9186f5 | 1426 | |
1da177e4 LT |
1427 | return i; |
1428 | } | |
1da177e4 LT |
1429 | EXPORT_SYMBOL(snprintf); |
1430 | ||
1431 | /** | |
1432 | * scnprintf - Format a string and place it in a buffer | |
1433 | * @buf: The buffer to place the result into | |
1434 | * @size: The size of the buffer, including the trailing null space | |
1435 | * @fmt: The format string to use | |
1436 | * @...: Arguments for the format string | |
1437 | * | |
1438 | * The return value is the number of characters written into @buf not including | |
ea6f3281 | 1439 | * the trailing '\0'. If @size is <= 0 the function returns 0. |
1da177e4 LT |
1440 | */ |
1441 | ||
7b9186f5 | 1442 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1443 | { |
1444 | va_list args; | |
1445 | int i; | |
1446 | ||
1447 | va_start(args, fmt); | |
1448 | i = vsnprintf(buf, size, fmt, args); | |
1449 | va_end(args); | |
7b9186f5 | 1450 | |
1da177e4 LT |
1451 | return (i >= size) ? (size - 1) : i; |
1452 | } | |
1453 | EXPORT_SYMBOL(scnprintf); | |
1454 | ||
1455 | /** | |
1456 | * vsprintf - Format a string and place it in a buffer | |
1457 | * @buf: The buffer to place the result into | |
1458 | * @fmt: The format string to use | |
1459 | * @args: Arguments for the format string | |
1460 | * | |
1461 | * The function returns the number of characters written | |
72fd4a35 | 1462 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1463 | * buffer overflows. |
1464 | * | |
1465 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1466 | * You probably want sprintf() instead. |
20036fdc AK |
1467 | * |
1468 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1469 | */ |
1470 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1471 | { | |
1472 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1473 | } | |
1da177e4 LT |
1474 | EXPORT_SYMBOL(vsprintf); |
1475 | ||
1476 | /** | |
1477 | * sprintf - Format a string and place it in a buffer | |
1478 | * @buf: The buffer to place the result into | |
1479 | * @fmt: The format string to use | |
1480 | * @...: Arguments for the format string | |
1481 | * | |
1482 | * The function returns the number of characters written | |
72fd4a35 | 1483 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1484 | * buffer overflows. |
20036fdc AK |
1485 | * |
1486 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1487 | */ |
7b9186f5 | 1488 | int sprintf(char *buf, const char *fmt, ...) |
1da177e4 LT |
1489 | { |
1490 | va_list args; | |
1491 | int i; | |
1492 | ||
1493 | va_start(args, fmt); | |
7b9186f5 | 1494 | i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4 | 1495 | va_end(args); |
7b9186f5 | 1496 | |
1da177e4 LT |
1497 | return i; |
1498 | } | |
1da177e4 LT |
1499 | EXPORT_SYMBOL(sprintf); |
1500 | ||
4370aa4a LJ |
1501 | #ifdef CONFIG_BINARY_PRINTF |
1502 | /* | |
1503 | * bprintf service: | |
1504 | * vbin_printf() - VA arguments to binary data | |
1505 | * bstr_printf() - Binary data to text string | |
1506 | */ | |
1507 | ||
1508 | /** | |
1509 | * vbin_printf - Parse a format string and place args' binary value in a buffer | |
1510 | * @bin_buf: The buffer to place args' binary value | |
1511 | * @size: The size of the buffer(by words(32bits), not characters) | |
1512 | * @fmt: The format string to use | |
1513 | * @args: Arguments for the format string | |
1514 | * | |
1515 | * The format follows C99 vsnprintf, except %n is ignored, and its argument | |
1516 | * is skiped. | |
1517 | * | |
1518 | * The return value is the number of words(32bits) which would be generated for | |
1519 | * the given input. | |
1520 | * | |
1521 | * NOTE: | |
1522 | * If the return value is greater than @size, the resulting bin_buf is NOT | |
1523 | * valid for bstr_printf(). | |
1524 | */ | |
1525 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) | |
1526 | { | |
fef20d9c | 1527 | struct printf_spec spec = {0}; |
4370aa4a | 1528 | char *str, *end; |
4370aa4a LJ |
1529 | |
1530 | str = (char *)bin_buf; | |
1531 | end = (char *)(bin_buf + size); | |
1532 | ||
1533 | #define save_arg(type) \ | |
1534 | do { \ | |
1535 | if (sizeof(type) == 8) { \ | |
1536 | unsigned long long value; \ | |
1537 | str = PTR_ALIGN(str, sizeof(u32)); \ | |
1538 | value = va_arg(args, unsigned long long); \ | |
1539 | if (str + sizeof(type) <= end) { \ | |
1540 | *(u32 *)str = *(u32 *)&value; \ | |
1541 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ | |
1542 | } \ | |
1543 | } else { \ | |
1544 | unsigned long value; \ | |
1545 | str = PTR_ALIGN(str, sizeof(type)); \ | |
1546 | value = va_arg(args, int); \ | |
1547 | if (str + sizeof(type) <= end) \ | |
1548 | *(typeof(type) *)str = (type)value; \ | |
1549 | } \ | |
1550 | str += sizeof(type); \ | |
1551 | } while (0) | |
1552 | ||
fef20d9c | 1553 | while (*fmt) { |
d4be151b | 1554 | int read = format_decode(fmt, &spec); |
4370aa4a | 1555 | |
fef20d9c | 1556 | fmt += read; |
4370aa4a | 1557 | |
fef20d9c FW |
1558 | switch (spec.type) { |
1559 | case FORMAT_TYPE_NONE: | |
d4be151b AGR |
1560 | case FORMAT_TYPE_INVALID: |
1561 | case FORMAT_TYPE_PERCENT_CHAR: | |
fef20d9c FW |
1562 | break; |
1563 | ||
ed681a91 | 1564 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1565 | case FORMAT_TYPE_PRECISION: |
1566 | save_arg(int); | |
1567 | break; | |
1568 | ||
1569 | case FORMAT_TYPE_CHAR: | |
4370aa4a | 1570 | save_arg(char); |
fef20d9c FW |
1571 | break; |
1572 | ||
1573 | case FORMAT_TYPE_STR: { | |
4370aa4a LJ |
1574 | const char *save_str = va_arg(args, char *); |
1575 | size_t len; | |
6c356634 | 1576 | |
4370aa4a LJ |
1577 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
1578 | || (unsigned long)save_str < PAGE_SIZE) | |
0f4f81dc | 1579 | save_str = "(null)"; |
6c356634 AGR |
1580 | len = strlen(save_str) + 1; |
1581 | if (str + len < end) | |
1582 | memcpy(str, save_str, len); | |
1583 | str += len; | |
fef20d9c | 1584 | break; |
4370aa4a | 1585 | } |
fef20d9c FW |
1586 | |
1587 | case FORMAT_TYPE_PTR: | |
4370aa4a LJ |
1588 | save_arg(void *); |
1589 | /* skip all alphanumeric pointer suffixes */ | |
fef20d9c | 1590 | while (isalnum(*fmt)) |
4370aa4a | 1591 | fmt++; |
fef20d9c FW |
1592 | break; |
1593 | ||
fef20d9c | 1594 | case FORMAT_TYPE_NRCHARS: { |
4370aa4a | 1595 | /* skip %n 's argument */ |
fef20d9c | 1596 | int qualifier = spec.qualifier; |
4370aa4a LJ |
1597 | void *skip_arg; |
1598 | if (qualifier == 'l') | |
1599 | skip_arg = va_arg(args, long *); | |
08562cb2 | 1600 | else if (TOLOWER(qualifier) == 'z') |
4370aa4a LJ |
1601 | skip_arg = va_arg(args, size_t *); |
1602 | else | |
1603 | skip_arg = va_arg(args, int *); | |
fef20d9c | 1604 | break; |
4370aa4a | 1605 | } |
fef20d9c FW |
1606 | |
1607 | default: | |
1608 | switch (spec.type) { | |
1609 | ||
1610 | case FORMAT_TYPE_LONG_LONG: | |
4370aa4a | 1611 | save_arg(long long); |
fef20d9c FW |
1612 | break; |
1613 | case FORMAT_TYPE_ULONG: | |
1614 | case FORMAT_TYPE_LONG: | |
4370aa4a | 1615 | save_arg(unsigned long); |
fef20d9c FW |
1616 | break; |
1617 | case FORMAT_TYPE_SIZE_T: | |
4370aa4a | 1618 | save_arg(size_t); |
fef20d9c FW |
1619 | break; |
1620 | case FORMAT_TYPE_PTRDIFF: | |
4370aa4a | 1621 | save_arg(ptrdiff_t); |
fef20d9c | 1622 | break; |
a4e94ef0 Z |
1623 | case FORMAT_TYPE_UBYTE: |
1624 | case FORMAT_TYPE_BYTE: | |
1625 | save_arg(char); | |
1626 | break; | |
fef20d9c FW |
1627 | case FORMAT_TYPE_USHORT: |
1628 | case FORMAT_TYPE_SHORT: | |
4370aa4a | 1629 | save_arg(short); |
fef20d9c FW |
1630 | break; |
1631 | default: | |
4370aa4a | 1632 | save_arg(int); |
fef20d9c | 1633 | } |
4370aa4a LJ |
1634 | } |
1635 | } | |
fef20d9c | 1636 | |
7b9186f5 | 1637 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c | 1638 | #undef save_arg |
4370aa4a LJ |
1639 | } |
1640 | EXPORT_SYMBOL_GPL(vbin_printf); | |
1641 | ||
1642 | /** | |
1643 | * bstr_printf - Format a string from binary arguments and place it in a buffer | |
1644 | * @buf: The buffer to place the result into | |
1645 | * @size: The size of the buffer, including the trailing null space | |
1646 | * @fmt: The format string to use | |
1647 | * @bin_buf: Binary arguments for the format string | |
1648 | * | |
1649 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets | |
1650 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is | |
1651 | * a binary buffer that generated by vbin_printf. | |
1652 | * | |
1653 | * The format follows C99 vsnprintf, but has some extensions: | |
0efb4d20 | 1654 | * see vsnprintf comment for details. |
4370aa4a LJ |
1655 | * |
1656 | * The return value is the number of characters which would | |
1657 | * be generated for the given input, excluding the trailing | |
1658 | * '\0', as per ISO C99. If you want to have the exact | |
1659 | * number of characters written into @buf as return value | |
1660 | * (not including the trailing '\0'), use vscnprintf(). If the | |
1661 | * return is greater than or equal to @size, the resulting | |
1662 | * string is truncated. | |
1663 | */ | |
1664 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) | |
1665 | { | |
fef20d9c | 1666 | struct printf_spec spec = {0}; |
d4be151b AGR |
1667 | char *str, *end; |
1668 | const char *args = (const char *)bin_buf; | |
4370aa4a | 1669 | |
2f30b1f9 | 1670 | if (WARN_ON_ONCE((int) size < 0)) |
4370aa4a | 1671 | return 0; |
4370aa4a LJ |
1672 | |
1673 | str = buf; | |
1674 | end = buf + size; | |
1675 | ||
1676 | #define get_arg(type) \ | |
1677 | ({ \ | |
1678 | typeof(type) value; \ | |
1679 | if (sizeof(type) == 8) { \ | |
1680 | args = PTR_ALIGN(args, sizeof(u32)); \ | |
1681 | *(u32 *)&value = *(u32 *)args; \ | |
1682 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ | |
1683 | } else { \ | |
1684 | args = PTR_ALIGN(args, sizeof(type)); \ | |
1685 | value = *(typeof(type) *)args; \ | |
1686 | } \ | |
1687 | args += sizeof(type); \ | |
1688 | value; \ | |
1689 | }) | |
1690 | ||
1691 | /* Make sure end is always >= buf */ | |
1692 | if (end < buf) { | |
1693 | end = ((void *)-1); | |
1694 | size = end - buf; | |
1695 | } | |
1696 | ||
fef20d9c | 1697 | while (*fmt) { |
fef20d9c | 1698 | const char *old_fmt = fmt; |
d4be151b | 1699 | int read = format_decode(fmt, &spec); |
4370aa4a | 1700 | |
fef20d9c | 1701 | fmt += read; |
4370aa4a | 1702 | |
fef20d9c FW |
1703 | switch (spec.type) { |
1704 | case FORMAT_TYPE_NONE: { | |
1705 | int copy = read; | |
1706 | if (str < end) { | |
1707 | if (copy > end - str) | |
1708 | copy = end - str; | |
1709 | memcpy(str, old_fmt, copy); | |
4370aa4a | 1710 | } |
fef20d9c FW |
1711 | str += read; |
1712 | break; | |
4370aa4a LJ |
1713 | } |
1714 | ||
ed681a91 | 1715 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1716 | spec.field_width = get_arg(int); |
1717 | break; | |
4370aa4a | 1718 | |
fef20d9c FW |
1719 | case FORMAT_TYPE_PRECISION: |
1720 | spec.precision = get_arg(int); | |
1721 | break; | |
4370aa4a | 1722 | |
d4be151b AGR |
1723 | case FORMAT_TYPE_CHAR: { |
1724 | char c; | |
1725 | ||
fef20d9c FW |
1726 | if (!(spec.flags & LEFT)) { |
1727 | while (--spec.field_width > 0) { | |
4370aa4a LJ |
1728 | if (str < end) |
1729 | *str = ' '; | |
1730 | ++str; | |
1731 | } | |
1732 | } | |
1733 | c = (unsigned char) get_arg(char); | |
1734 | if (str < end) | |
1735 | *str = c; | |
1736 | ++str; | |
fef20d9c | 1737 | while (--spec.field_width > 0) { |
4370aa4a LJ |
1738 | if (str < end) |
1739 | *str = ' '; | |
1740 | ++str; | |
1741 | } | |
fef20d9c | 1742 | break; |
d4be151b | 1743 | } |
4370aa4a | 1744 | |
fef20d9c | 1745 | case FORMAT_TYPE_STR: { |
4370aa4a | 1746 | const char *str_arg = args; |
d4be151b | 1747 | args += strlen(str_arg) + 1; |
fef20d9c FW |
1748 | str = string(str, end, (char *)str_arg, spec); |
1749 | break; | |
4370aa4a LJ |
1750 | } |
1751 | ||
fef20d9c FW |
1752 | case FORMAT_TYPE_PTR: |
1753 | str = pointer(fmt+1, str, end, get_arg(void *), spec); | |
1754 | while (isalnum(*fmt)) | |
4370aa4a | 1755 | fmt++; |
fef20d9c | 1756 | break; |
4370aa4a | 1757 | |
fef20d9c | 1758 | case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c | 1759 | case FORMAT_TYPE_INVALID: |
4370aa4a LJ |
1760 | if (str < end) |
1761 | *str = '%'; | |
1762 | ++str; | |
fef20d9c FW |
1763 | break; |
1764 | ||
1765 | case FORMAT_TYPE_NRCHARS: | |
1766 | /* skip */ | |
1767 | break; | |
1768 | ||
d4be151b AGR |
1769 | default: { |
1770 | unsigned long long num; | |
1771 | ||
fef20d9c FW |
1772 | switch (spec.type) { |
1773 | ||
1774 | case FORMAT_TYPE_LONG_LONG: | |
1775 | num = get_arg(long long); | |
1776 | break; | |
1777 | case FORMAT_TYPE_ULONG: | |
fef20d9c FW |
1778 | case FORMAT_TYPE_LONG: |
1779 | num = get_arg(unsigned long); | |
1780 | break; | |
1781 | case FORMAT_TYPE_SIZE_T: | |
1782 | num = get_arg(size_t); | |
1783 | break; | |
1784 | case FORMAT_TYPE_PTRDIFF: | |
1785 | num = get_arg(ptrdiff_t); | |
1786 | break; | |
a4e94ef0 Z |
1787 | case FORMAT_TYPE_UBYTE: |
1788 | num = get_arg(unsigned char); | |
1789 | break; | |
1790 | case FORMAT_TYPE_BYTE: | |
1791 | num = get_arg(signed char); | |
1792 | break; | |
fef20d9c FW |
1793 | case FORMAT_TYPE_USHORT: |
1794 | num = get_arg(unsigned short); | |
1795 | break; | |
1796 | case FORMAT_TYPE_SHORT: | |
1797 | num = get_arg(short); | |
1798 | break; | |
1799 | case FORMAT_TYPE_UINT: | |
1800 | num = get_arg(unsigned int); | |
1801 | break; | |
1802 | default: | |
1803 | num = get_arg(int); | |
1804 | } | |
1805 | ||
1806 | str = number(str, end, num, spec); | |
d4be151b AGR |
1807 | } /* default: */ |
1808 | } /* switch(spec.type) */ | |
1809 | } /* while(*fmt) */ | |
fef20d9c | 1810 | |
4370aa4a LJ |
1811 | if (size > 0) { |
1812 | if (str < end) | |
1813 | *str = '\0'; | |
1814 | else | |
1815 | end[-1] = '\0'; | |
1816 | } | |
fef20d9c | 1817 | |
4370aa4a LJ |
1818 | #undef get_arg |
1819 | ||
1820 | /* the trailing null byte doesn't count towards the total */ | |
1821 | return str - buf; | |
1822 | } | |
1823 | EXPORT_SYMBOL_GPL(bstr_printf); | |
1824 | ||
1825 | /** | |
1826 | * bprintf - Parse a format string and place args' binary value in a buffer | |
1827 | * @bin_buf: The buffer to place args' binary value | |
1828 | * @size: The size of the buffer(by words(32bits), not characters) | |
1829 | * @fmt: The format string to use | |
1830 | * @...: Arguments for the format string | |
1831 | * | |
1832 | * The function returns the number of words(u32) written | |
1833 | * into @bin_buf. | |
1834 | */ | |
1835 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) | |
1836 | { | |
1837 | va_list args; | |
1838 | int ret; | |
1839 | ||
1840 | va_start(args, fmt); | |
1841 | ret = vbin_printf(bin_buf, size, fmt, args); | |
1842 | va_end(args); | |
7b9186f5 | 1843 | |
4370aa4a LJ |
1844 | return ret; |
1845 | } | |
1846 | EXPORT_SYMBOL_GPL(bprintf); | |
1847 | ||
1848 | #endif /* CONFIG_BINARY_PRINTF */ | |
1849 | ||
1da177e4 LT |
1850 | /** |
1851 | * vsscanf - Unformat a buffer into a list of arguments | |
1852 | * @buf: input buffer | |
1853 | * @fmt: format of buffer | |
1854 | * @args: arguments | |
1855 | */ | |
7b9186f5 | 1856 | int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4 LT |
1857 | { |
1858 | const char *str = buf; | |
1859 | char *next; | |
1860 | char digit; | |
1861 | int num = 0; | |
7b9186f5 | 1862 | int qualifier, base, field_width; |
d4be151b | 1863 | bool is_sign; |
1da177e4 | 1864 | |
7b9186f5 | 1865 | while (*fmt && *str) { |
1da177e4 LT |
1866 | /* skip any white space in format */ |
1867 | /* white space in format matchs any amount of | |
1868 | * white space, including none, in the input. | |
1869 | */ | |
1870 | if (isspace(*fmt)) { | |
e7d2860b AGR |
1871 | fmt = skip_spaces(++fmt); |
1872 | str = skip_spaces(str); | |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /* anything that is not a conversion must match exactly */ | |
1876 | if (*fmt != '%' && *fmt) { | |
1877 | if (*fmt++ != *str++) | |
1878 | break; | |
1879 | continue; | |
1880 | } | |
1881 | ||
1882 | if (!*fmt) | |
1883 | break; | |
1884 | ++fmt; | |
7b9186f5 | 1885 | |
1da177e4 LT |
1886 | /* skip this conversion. |
1887 | * advance both strings to next white space | |
1888 | */ | |
1889 | if (*fmt == '*') { | |
8fccae2c | 1890 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4 LT |
1891 | fmt++; |
1892 | while (!isspace(*str) && *str) | |
1893 | str++; | |
1894 | continue; | |
1895 | } | |
1896 | ||
1897 | /* get field width */ | |
1898 | field_width = -1; | |
1899 | if (isdigit(*fmt)) | |
1900 | field_width = skip_atoi(&fmt); | |
1901 | ||
1902 | /* get conversion qualifier */ | |
1903 | qualifier = -1; | |
08562cb2 AGR |
1904 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1905 | TOLOWER(*fmt) == 'z') { | |
1da177e4 LT |
1906 | qualifier = *fmt++; |
1907 | if (unlikely(qualifier == *fmt)) { | |
1908 | if (qualifier == 'h') { | |
1909 | qualifier = 'H'; | |
1910 | fmt++; | |
1911 | } else if (qualifier == 'l') { | |
1912 | qualifier = 'L'; | |
1913 | fmt++; | |
1914 | } | |
1915 | } | |
1916 | } | |
1da177e4 LT |
1917 | |
1918 | if (!*fmt || !*str) | |
1919 | break; | |
1920 | ||
d4be151b AGR |
1921 | base = 10; |
1922 | is_sign = 0; | |
1923 | ||
7b9186f5 | 1924 | switch (*fmt++) { |
1da177e4 LT |
1925 | case 'c': |
1926 | { | |
7b9186f5 | 1927 | char *s = (char *)va_arg(args, char*); |
1da177e4 LT |
1928 | if (field_width == -1) |
1929 | field_width = 1; | |
1930 | do { | |
1931 | *s++ = *str++; | |
1932 | } while (--field_width > 0 && *str); | |
1933 | num++; | |
1934 | } | |
1935 | continue; | |
1936 | case 's': | |
1937 | { | |
7b9186f5 AGR |
1938 | char *s = (char *)va_arg(args, char *); |
1939 | if (field_width == -1) | |
1da177e4 LT |
1940 | field_width = INT_MAX; |
1941 | /* first, skip leading white space in buffer */ | |
e7d2860b | 1942 | str = skip_spaces(str); |
1da177e4 LT |
1943 | |
1944 | /* now copy until next white space */ | |
7b9186f5 | 1945 | while (*str && !isspace(*str) && field_width--) |
1da177e4 | 1946 | *s++ = *str++; |
1da177e4 LT |
1947 | *s = '\0'; |
1948 | num++; | |
1949 | } | |
1950 | continue; | |
1951 | case 'n': | |
1952 | /* return number of characters read so far */ | |
1953 | { | |
7b9186f5 | 1954 | int *i = (int *)va_arg(args, int*); |
1da177e4 LT |
1955 | *i = str - buf; |
1956 | } | |
1957 | continue; | |
1958 | case 'o': | |
1959 | base = 8; | |
1960 | break; | |
1961 | case 'x': | |
1962 | case 'X': | |
1963 | base = 16; | |
1964 | break; | |
1965 | case 'i': | |
7b9186f5 | 1966 | base = 0; |
1da177e4 LT |
1967 | case 'd': |
1968 | is_sign = 1; | |
1969 | case 'u': | |
1970 | break; | |
1971 | case '%': | |
1972 | /* looking for '%' in str */ | |
7b9186f5 | 1973 | if (*str++ != '%') |
1da177e4 LT |
1974 | return num; |
1975 | continue; | |
1976 | default: | |
1977 | /* invalid format; stop here */ | |
1978 | return num; | |
1979 | } | |
1980 | ||
1981 | /* have some sort of integer conversion. | |
1982 | * first, skip white space in buffer. | |
1983 | */ | |
e7d2860b | 1984 | str = skip_spaces(str); |
1da177e4 LT |
1985 | |
1986 | digit = *str; | |
1987 | if (is_sign && digit == '-') | |
1988 | digit = *(str + 1); | |
1989 | ||
1990 | if (!digit | |
7b9186f5 AGR |
1991 | || (base == 16 && !isxdigit(digit)) |
1992 | || (base == 10 && !isdigit(digit)) | |
1993 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
1994 | || (base == 0 && !isdigit(digit))) | |
1995 | break; | |
1da177e4 | 1996 | |
7b9186f5 | 1997 | switch (qualifier) { |
1da177e4 LT |
1998 | case 'H': /* that's 'hh' in format */ |
1999 | if (is_sign) { | |
7b9186f5 AGR |
2000 | signed char *s = (signed char *)va_arg(args, signed char *); |
2001 | *s = (signed char)simple_strtol(str, &next, base); | |
1da177e4 | 2002 | } else { |
7b9186f5 AGR |
2003 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
2004 | *s = (unsigned char)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2005 | } |
2006 | break; | |
2007 | case 'h': | |
2008 | if (is_sign) { | |
7b9186f5 AGR |
2009 | short *s = (short *)va_arg(args, short *); |
2010 | *s = (short)simple_strtol(str, &next, base); | |
1da177e4 | 2011 | } else { |
7b9186f5 AGR |
2012 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
2013 | *s = (unsigned short)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2014 | } |
2015 | break; | |
2016 | case 'l': | |
2017 | if (is_sign) { | |
7b9186f5 AGR |
2018 | long *l = (long *)va_arg(args, long *); |
2019 | *l = simple_strtol(str, &next, base); | |
1da177e4 | 2020 | } else { |
7b9186f5 AGR |
2021 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
2022 | *l = simple_strtoul(str, &next, base); | |
1da177e4 LT |
2023 | } |
2024 | break; | |
2025 | case 'L': | |
2026 | if (is_sign) { | |
7b9186f5 AGR |
2027 | long long *l = (long long *)va_arg(args, long long *); |
2028 | *l = simple_strtoll(str, &next, base); | |
1da177e4 | 2029 | } else { |
7b9186f5 AGR |
2030 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
2031 | *l = simple_strtoull(str, &next, base); | |
1da177e4 LT |
2032 | } |
2033 | break; | |
2034 | case 'Z': | |
2035 | case 'z': | |
2036 | { | |
7b9186f5 AGR |
2037 | size_t *s = (size_t *)va_arg(args, size_t *); |
2038 | *s = (size_t)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2039 | } |
2040 | break; | |
2041 | default: | |
2042 | if (is_sign) { | |
7b9186f5 AGR |
2043 | int *i = (int *)va_arg(args, int *); |
2044 | *i = (int)simple_strtol(str, &next, base); | |
1da177e4 | 2045 | } else { |
7b9186f5 AGR |
2046 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
2047 | *i = (unsigned int)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2048 | } |
2049 | break; | |
2050 | } | |
2051 | num++; | |
2052 | ||
2053 | if (!next) | |
2054 | break; | |
2055 | str = next; | |
2056 | } | |
c6b40d16 JB |
2057 | |
2058 | /* | |
2059 | * Now we've come all the way through so either the input string or the | |
2060 | * format ended. In the former case, there can be a %n at the current | |
2061 | * position in the format that needs to be filled. | |
2062 | */ | |
2063 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
2064 | int *p = (int *)va_arg(args, int *); | |
2065 | *p = str - buf; | |
2066 | } | |
2067 | ||
1da177e4 LT |
2068 | return num; |
2069 | } | |
1da177e4 LT |
2070 | EXPORT_SYMBOL(vsscanf); |
2071 | ||
2072 | /** | |
2073 | * sscanf - Unformat a buffer into a list of arguments | |
2074 | * @buf: input buffer | |
2075 | * @fmt: formatting of buffer | |
2076 | * @...: resulting arguments | |
2077 | */ | |
7b9186f5 | 2078 | int sscanf(const char *buf, const char *fmt, ...) |
1da177e4 LT |
2079 | { |
2080 | va_list args; | |
2081 | int i; | |
2082 | ||
7b9186f5 AGR |
2083 | va_start(args, fmt); |
2084 | i = vsscanf(buf, fmt, args); | |
1da177e4 | 2085 | va_end(args); |
7b9186f5 | 2086 | |
1da177e4 LT |
2087 | return i; |
2088 | } | |
1da177e4 | 2089 | EXPORT_SYMBOL(sscanf); |