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 */ | |
b89dc5d6 BH |
384 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
385 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ | |
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 { | |
ef0658f3 JP |
411 | u16 type; |
412 | s16 field_width; /* width of output field */ | |
413 | u8 flags; /* flags to number() */ | |
414 | u8 base; | |
415 | s8 precision; /* # of digits/chars */ | |
416 | u8 qualifier; | |
fef20d9c FW |
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 |
4da0b66c | 600 | static const struct printf_spec io_spec = { |
fef20d9c | 601 | .base = 16, |
4da0b66c | 602 | .field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c FW |
603 | .precision = -1, |
604 | .flags = SPECIAL | SMALL | ZEROPAD, | |
605 | }; | |
4da0b66c BH |
606 | static const struct printf_spec mem_spec = { |
607 | .base = 16, | |
608 | .field_width = MEM_RSRC_PRINTK_SIZE, | |
609 | .precision = -1, | |
610 | .flags = SPECIAL | SMALL | ZEROPAD, | |
611 | }; | |
612 | static const struct printf_spec dec_spec = { | |
c91d3376 BH |
613 | .base = 10, |
614 | .precision = -1, | |
615 | .flags = 0, | |
616 | }; | |
4da0b66c | 617 | static const struct printf_spec str_spec = { |
fd95541e BH |
618 | .field_width = -1, |
619 | .precision = 10, | |
620 | .flags = LEFT, | |
621 | }; | |
4da0b66c | 622 | static const struct printf_spec flag_spec = { |
fd95541e BH |
623 | .base = 16, |
624 | .precision = -1, | |
625 | .flags = SPECIAL | SMALL, | |
626 | }; | |
c7dabef8 BH |
627 | |
628 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) | |
629 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ | |
630 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) | |
631 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) | |
632 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]") | |
633 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") | |
634 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, | |
635 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; | |
636 | ||
332d2e78 | 637 | char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8 | 638 | int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c | 639 | const struct printf_spec *specp; |
332d2e78 LT |
640 | |
641 | *p++ = '['; | |
4da0b66c | 642 | if (res->flags & IORESOURCE_IO) { |
c7dabef8 | 643 | p = string(p, pend, "io ", str_spec); |
4da0b66c BH |
644 | specp = &io_spec; |
645 | } else if (res->flags & IORESOURCE_MEM) { | |
c7dabef8 | 646 | p = string(p, pend, "mem ", str_spec); |
4da0b66c BH |
647 | specp = &mem_spec; |
648 | } else if (res->flags & IORESOURCE_IRQ) { | |
c7dabef8 | 649 | p = string(p, pend, "irq ", str_spec); |
4da0b66c BH |
650 | specp = &dec_spec; |
651 | } else if (res->flags & IORESOURCE_DMA) { | |
c7dabef8 | 652 | p = string(p, pend, "dma ", str_spec); |
4da0b66c BH |
653 | specp = &dec_spec; |
654 | } else { | |
c7dabef8 | 655 | p = string(p, pend, "??? ", str_spec); |
4da0b66c | 656 | specp = &mem_spec; |
c7dabef8 | 657 | decode = 0; |
fd95541e | 658 | } |
4da0b66c | 659 | p = number(p, pend, res->start, *specp); |
c91d3376 BH |
660 | if (res->start != res->end) { |
661 | *p++ = '-'; | |
4da0b66c | 662 | p = number(p, pend, res->end, *specp); |
c91d3376 | 663 | } |
c7dabef8 | 664 | if (decode) { |
fd95541e BH |
665 | if (res->flags & IORESOURCE_MEM_64) |
666 | p = string(p, pend, " 64bit", str_spec); | |
667 | if (res->flags & IORESOURCE_PREFETCH) | |
668 | p = string(p, pend, " pref", str_spec); | |
669 | if (res->flags & IORESOURCE_DISABLED) | |
670 | p = string(p, pend, " disabled", str_spec); | |
c7dabef8 BH |
671 | } else { |
672 | p = string(p, pend, " flags ", str_spec); | |
673 | p = number(p, pend, res->flags, flag_spec); | |
fd95541e | 674 | } |
332d2e78 | 675 | *p++ = ']'; |
c7dabef8 | 676 | *p = '\0'; |
332d2e78 | 677 | |
fef20d9c | 678 | return string(buf, end, sym, spec); |
332d2e78 LT |
679 | } |
680 | ||
fef20d9c | 681 | static char *mac_address_string(char *buf, char *end, u8 *addr, |
8a27f7c9 | 682 | struct printf_spec spec, const char *fmt) |
dd45c9cf | 683 | { |
8a27f7c9 | 684 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf HH |
685 | char *p = mac_addr; |
686 | int i; | |
bc7259a2 JP |
687 | char separator; |
688 | ||
689 | if (fmt[1] == 'F') { /* FDDI canonical format */ | |
bc7259a2 JP |
690 | separator = '-'; |
691 | } else { | |
bc7259a2 JP |
692 | separator = ':'; |
693 | } | |
dd45c9cf HH |
694 | |
695 | for (i = 0; i < 6; i++) { | |
c8e00060 | 696 | p = pack_hex_byte(p, addr[i]); |
8a27f7c9 | 697 | if (fmt[0] == 'M' && i != 5) |
bc7259a2 | 698 | *p++ = separator; |
dd45c9cf HH |
699 | } |
700 | *p = '\0'; | |
701 | ||
fef20d9c | 702 | return string(buf, end, mac_addr, spec); |
dd45c9cf HH |
703 | } |
704 | ||
0159f24e | 705 | static char *ip4_string(char *p, const u8 *addr, const char *fmt) |
8a27f7c9 JP |
706 | { |
707 | int i; | |
0159f24e JP |
708 | bool leading_zeros = (fmt[0] == 'i'); |
709 | int index; | |
710 | int step; | |
711 | ||
712 | switch (fmt[2]) { | |
713 | case 'h': | |
714 | #ifdef __BIG_ENDIAN | |
715 | index = 0; | |
716 | step = 1; | |
717 | #else | |
718 | index = 3; | |
719 | step = -1; | |
720 | #endif | |
721 | break; | |
722 | case 'l': | |
723 | index = 3; | |
724 | step = -1; | |
725 | break; | |
726 | case 'n': | |
727 | case 'b': | |
728 | default: | |
729 | index = 0; | |
730 | step = 1; | |
731 | break; | |
732 | } | |
8a27f7c9 JP |
733 | for (i = 0; i < 4; i++) { |
734 | char temp[3]; /* hold each IP quad in reverse order */ | |
0159f24e | 735 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c9 JP |
736 | if (leading_zeros) { |
737 | if (digits < 3) | |
738 | *p++ = '0'; | |
739 | if (digits < 2) | |
740 | *p++ = '0'; | |
741 | } | |
742 | /* reverse the digits in the quad */ | |
743 | while (digits--) | |
744 | *p++ = temp[digits]; | |
745 | if (i < 3) | |
746 | *p++ = '.'; | |
0159f24e | 747 | index += step; |
8a27f7c9 | 748 | } |
8a27f7c9 | 749 | *p = '\0'; |
7b9186f5 | 750 | |
8a27f7c9 JP |
751 | return p; |
752 | } | |
753 | ||
eb78cd26 | 754 | static char *ip6_compressed_string(char *p, const char *addr) |
689afa7d | 755 | { |
7b9186f5 | 756 | int i, j, range; |
8a27f7c9 JP |
757 | unsigned char zerolength[8]; |
758 | int longest = 1; | |
759 | int colonpos = -1; | |
760 | u16 word; | |
7b9186f5 | 761 | u8 hi, lo; |
8a27f7c9 | 762 | bool needcolon = false; |
eb78cd26 JP |
763 | bool useIPv4; |
764 | struct in6_addr in6; | |
765 | ||
766 | memcpy(&in6, addr, sizeof(struct in6_addr)); | |
767 | ||
768 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); | |
8a27f7c9 JP |
769 | |
770 | memset(zerolength, 0, sizeof(zerolength)); | |
771 | ||
772 | if (useIPv4) | |
773 | range = 6; | |
774 | else | |
775 | range = 8; | |
776 | ||
777 | /* find position of longest 0 run */ | |
778 | for (i = 0; i < range; i++) { | |
779 | for (j = i; j < range; j++) { | |
eb78cd26 | 780 | if (in6.s6_addr16[j] != 0) |
8a27f7c9 JP |
781 | break; |
782 | zerolength[i]++; | |
783 | } | |
784 | } | |
785 | for (i = 0; i < range; i++) { | |
786 | if (zerolength[i] > longest) { | |
787 | longest = zerolength[i]; | |
788 | colonpos = i; | |
789 | } | |
790 | } | |
689afa7d | 791 | |
8a27f7c9 JP |
792 | /* emit address */ |
793 | for (i = 0; i < range; i++) { | |
794 | if (i == colonpos) { | |
795 | if (needcolon || i == 0) | |
796 | *p++ = ':'; | |
797 | *p++ = ':'; | |
798 | needcolon = false; | |
799 | i += longest - 1; | |
800 | continue; | |
801 | } | |
802 | if (needcolon) { | |
803 | *p++ = ':'; | |
804 | needcolon = false; | |
805 | } | |
806 | /* hex u16 without leading 0s */ | |
eb78cd26 | 807 | word = ntohs(in6.s6_addr16[i]); |
8a27f7c9 JP |
808 | hi = word >> 8; |
809 | lo = word & 0xff; | |
810 | if (hi) { | |
811 | if (hi > 0x0f) | |
812 | p = pack_hex_byte(p, hi); | |
813 | else | |
814 | *p++ = hex_asc_lo(hi); | |
b5ff992b | 815 | p = pack_hex_byte(p, lo); |
8a27f7c9 | 816 | } |
b5ff992b | 817 | else if (lo > 0x0f) |
8a27f7c9 JP |
818 | p = pack_hex_byte(p, lo); |
819 | else | |
820 | *p++ = hex_asc_lo(lo); | |
821 | needcolon = true; | |
822 | } | |
823 | ||
824 | if (useIPv4) { | |
825 | if (needcolon) | |
826 | *p++ = ':'; | |
0159f24e | 827 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c9 | 828 | } |
8a27f7c9 | 829 | *p = '\0'; |
7b9186f5 | 830 | |
8a27f7c9 JP |
831 | return p; |
832 | } | |
833 | ||
eb78cd26 | 834 | static char *ip6_string(char *p, const char *addr, const char *fmt) |
8a27f7c9 JP |
835 | { |
836 | int i; | |
7b9186f5 | 837 | |
689afa7d | 838 | for (i = 0; i < 8; i++) { |
eb78cd26 JP |
839 | p = pack_hex_byte(p, *addr++); |
840 | p = pack_hex_byte(p, *addr++); | |
8a27f7c9 | 841 | if (fmt[0] == 'I' && i != 7) |
689afa7d HH |
842 | *p++ = ':'; |
843 | } | |
844 | *p = '\0'; | |
7b9186f5 | 845 | |
8a27f7c9 JP |
846 | return p; |
847 | } | |
848 | ||
849 | static char *ip6_addr_string(char *buf, char *end, const u8 *addr, | |
850 | struct printf_spec spec, const char *fmt) | |
851 | { | |
852 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; | |
853 | ||
854 | if (fmt[0] == 'I' && fmt[2] == 'c') | |
eb78cd26 | 855 | ip6_compressed_string(ip6_addr, addr); |
8a27f7c9 | 856 | else |
eb78cd26 | 857 | ip6_string(ip6_addr, addr, fmt); |
689afa7d | 858 | |
fef20d9c | 859 | return string(buf, end, ip6_addr, spec); |
689afa7d HH |
860 | } |
861 | ||
8a27f7c9 JP |
862 | static char *ip4_addr_string(char *buf, char *end, const u8 *addr, |
863 | struct printf_spec spec, const char *fmt) | |
4aa99606 | 864 | { |
8a27f7c9 | 865 | char ip4_addr[sizeof("255.255.255.255")]; |
4aa99606 | 866 | |
0159f24e | 867 | ip4_string(ip4_addr, addr, fmt); |
4aa99606 | 868 | |
fef20d9c | 869 | return string(buf, end, ip4_addr, spec); |
4aa99606 HH |
870 | } |
871 | ||
9ac6e44e JP |
872 | static char *uuid_string(char *buf, char *end, const u8 *addr, |
873 | struct printf_spec spec, const char *fmt) | |
874 | { | |
875 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; | |
876 | char *p = uuid; | |
877 | int i; | |
878 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; | |
879 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; | |
880 | const u8 *index = be; | |
881 | bool uc = false; | |
882 | ||
883 | switch (*(++fmt)) { | |
884 | case 'L': | |
885 | uc = true; /* fall-through */ | |
886 | case 'l': | |
887 | index = le; | |
888 | break; | |
889 | case 'B': | |
890 | uc = true; | |
891 | break; | |
892 | } | |
893 | ||
894 | for (i = 0; i < 16; i++) { | |
895 | p = pack_hex_byte(p, addr[index[i]]); | |
896 | switch (i) { | |
897 | case 3: | |
898 | case 5: | |
899 | case 7: | |
900 | case 9: | |
901 | *p++ = '-'; | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | *p = 0; | |
907 | ||
908 | if (uc) { | |
909 | p = uuid; | |
910 | do { | |
911 | *p = toupper(*p); | |
912 | } while (*(++p)); | |
913 | } | |
914 | ||
915 | return string(buf, end, uuid, spec); | |
916 | } | |
917 | ||
4d8a743c LT |
918 | /* |
919 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
920 | * by an extra set of alphanumeric characters that are extended format | |
921 | * specifiers. | |
922 | * | |
332d2e78 LT |
923 | * Right now we handle: |
924 | * | |
0c8b946e FW |
925 | * - 'F' For symbolic function descriptor pointers with offset |
926 | * - 'f' For simple symbolic function names without offset | |
0efb4d20 SR |
927 | * - 'S' For symbolic direct pointers with offset |
928 | * - 's' For symbolic direct pointers without offset | |
c7dabef8 BH |
929 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
930 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] | |
dd45c9cf HH |
931 | * - 'M' For a 6-byte MAC address, it prints the address in the |
932 | * usual colon-separated hex notation | |
8a27f7c9 | 933 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2 | 934 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e00060 | 935 | * with a dash-separated hex notation |
8a27f7c9 JP |
936 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
937 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) | |
938 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's | |
939 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses | |
940 | * IPv6 omits the colons (01020304...0f) | |
941 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) | |
0159f24e | 942 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c9 | 943 | * - 'I6c' for IPv6 addresses printed as specified by |
3f472402 | 944 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
9ac6e44e JP |
945 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
946 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" | |
947 | * Options for %pU are: | |
948 | * b big endian lower case hex (default) | |
949 | * B big endian UPPER case hex | |
950 | * l little endian lower case hex | |
951 | * L little endian UPPER case hex | |
952 | * big endian output byte order is: | |
953 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] | |
954 | * little endian output byte order is: | |
955 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] | |
956 | * | |
332d2e78 LT |
957 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
958 | * function pointers are really function descriptors, which contain a | |
959 | * pointer to the real address. | |
4d8a743c | 960 | */ |
fef20d9c FW |
961 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
962 | struct printf_spec spec) | |
78a8bf69 | 963 | { |
d97106ab | 964 | if (!ptr) |
fef20d9c | 965 | return string(buf, end, "(null)", spec); |
d97106ab | 966 | |
0fe1ef24 LT |
967 | switch (*fmt) { |
968 | case 'F': | |
0c8b946e | 969 | case 'f': |
0fe1ef24 LT |
970 | ptr = dereference_function_descriptor(ptr); |
971 | /* Fallthrough */ | |
972 | case 'S': | |
9ac6e44e | 973 | case 's': |
0c8b946e | 974 | return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e78 | 975 | case 'R': |
c7dabef8 | 976 | case 'r': |
fd95541e | 977 | return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c9 JP |
978 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
979 | case 'm': /* Contiguous: 000102030405 */ | |
bc7259a2 | 980 | /* [mM]F (FDDI, bit reversed) */ |
8a27f7c9 JP |
981 | return mac_address_string(buf, end, ptr, spec, fmt); |
982 | case 'I': /* Formatted IP supported | |
983 | * 4: 1.2.3.4 | |
984 | * 6: 0001:0203:...:0708 | |
985 | * 6c: 1::708 or 1::1.2.3.4 | |
986 | */ | |
987 | case 'i': /* Contiguous: | |
988 | * 4: 001.002.003.004 | |
989 | * 6: 000102...0f | |
990 | */ | |
991 | switch (fmt[1]) { | |
992 | case '6': | |
993 | return ip6_addr_string(buf, end, ptr, spec, fmt); | |
994 | case '4': | |
995 | return ip4_addr_string(buf, end, ptr, spec, fmt); | |
996 | } | |
fef20d9c | 997 | break; |
9ac6e44e JP |
998 | case 'U': |
999 | return uuid_string(buf, end, ptr, spec, fmt); | |
fef20d9c FW |
1000 | } |
1001 | spec.flags |= SMALL; | |
1002 | if (spec.field_width == -1) { | |
1003 | spec.field_width = 2*sizeof(void *); | |
1004 | spec.flags |= ZEROPAD; | |
1005 | } | |
1006 | spec.base = 16; | |
1007 | ||
1008 | return number(buf, end, (unsigned long) ptr, spec); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Helper function to decode printf style format. | |
1013 | * Each call decode a token from the format and return the | |
1014 | * number of characters read (or likely the delta where it wants | |
1015 | * to go on the next call). | |
1016 | * The decoded token is returned through the parameters | |
1017 | * | |
1018 | * 'h', 'l', or 'L' for integer fields | |
1019 | * 'z' support added 23/7/1999 S.H. | |
1020 | * 'z' changed to 'Z' --davidm 1/25/99 | |
1021 | * 't' added for ptrdiff_t | |
1022 | * | |
1023 | * @fmt: the format string | |
1024 | * @type of the token returned | |
1025 | * @flags: various flags such as +, -, # tokens.. | |
1026 | * @field_width: overwritten width | |
1027 | * @base: base of the number (octal, hex, ...) | |
1028 | * @precision: precision of a number | |
1029 | * @qualifier: qualifier of a number (long, size_t, ...) | |
1030 | */ | |
1031 | static int format_decode(const char *fmt, struct printf_spec *spec) | |
1032 | { | |
1033 | const char *start = fmt; | |
fef20d9c FW |
1034 | |
1035 | /* we finished early by reading the field width */ | |
ed681a91 | 1036 | if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c FW |
1037 | if (spec->field_width < 0) { |
1038 | spec->field_width = -spec->field_width; | |
1039 | spec->flags |= LEFT; | |
1040 | } | |
1041 | spec->type = FORMAT_TYPE_NONE; | |
1042 | goto precision; | |
1043 | } | |
1044 | ||
1045 | /* we finished early by reading the precision */ | |
1046 | if (spec->type == FORMAT_TYPE_PRECISION) { | |
1047 | if (spec->precision < 0) | |
1048 | spec->precision = 0; | |
1049 | ||
1050 | spec->type = FORMAT_TYPE_NONE; | |
1051 | goto qualifier; | |
1052 | } | |
1053 | ||
1054 | /* By default */ | |
1055 | spec->type = FORMAT_TYPE_NONE; | |
1056 | ||
1057 | for (; *fmt ; ++fmt) { | |
1058 | if (*fmt == '%') | |
1059 | break; | |
1060 | } | |
1061 | ||
1062 | /* Return the current non-format string */ | |
1063 | if (fmt != start || !*fmt) | |
1064 | return fmt - start; | |
1065 | ||
1066 | /* Process flags */ | |
1067 | spec->flags = 0; | |
1068 | ||
1069 | while (1) { /* this also skips first '%' */ | |
1070 | bool found = true; | |
1071 | ||
1072 | ++fmt; | |
1073 | ||
1074 | switch (*fmt) { | |
1075 | case '-': spec->flags |= LEFT; break; | |
1076 | case '+': spec->flags |= PLUS; break; | |
1077 | case ' ': spec->flags |= SPACE; break; | |
1078 | case '#': spec->flags |= SPECIAL; break; | |
1079 | case '0': spec->flags |= ZEROPAD; break; | |
1080 | default: found = false; | |
1081 | } | |
1082 | ||
1083 | if (!found) | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | /* get field width */ | |
1088 | spec->field_width = -1; | |
1089 | ||
1090 | if (isdigit(*fmt)) | |
1091 | spec->field_width = skip_atoi(&fmt); | |
1092 | else if (*fmt == '*') { | |
1093 | /* it's the next argument */ | |
ed681a91 | 1094 | spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c FW |
1095 | return ++fmt - start; |
1096 | } | |
1097 | ||
1098 | precision: | |
1099 | /* get the precision */ | |
1100 | spec->precision = -1; | |
1101 | if (*fmt == '.') { | |
1102 | ++fmt; | |
1103 | if (isdigit(*fmt)) { | |
1104 | spec->precision = skip_atoi(&fmt); | |
1105 | if (spec->precision < 0) | |
1106 | spec->precision = 0; | |
1107 | } else if (*fmt == '*') { | |
1108 | /* it's the next argument */ | |
adf26f84 | 1109 | spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c FW |
1110 | return ++fmt - start; |
1111 | } | |
1112 | } | |
1113 | ||
1114 | qualifier: | |
1115 | /* get the conversion qualifier */ | |
1116 | spec->qualifier = -1; | |
08562cb2 AGR |
1117 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1118 | TOLOWER(*fmt) == 'z' || *fmt == 't') { | |
a4e94ef0 Z |
1119 | spec->qualifier = *fmt++; |
1120 | if (unlikely(spec->qualifier == *fmt)) { | |
1121 | if (spec->qualifier == 'l') { | |
1122 | spec->qualifier = 'L'; | |
1123 | ++fmt; | |
1124 | } else if (spec->qualifier == 'h') { | |
1125 | spec->qualifier = 'H'; | |
1126 | ++fmt; | |
1127 | } | |
fef20d9c FW |
1128 | } |
1129 | } | |
1130 | ||
1131 | /* default base */ | |
1132 | spec->base = 10; | |
1133 | switch (*fmt) { | |
1134 | case 'c': | |
1135 | spec->type = FORMAT_TYPE_CHAR; | |
1136 | return ++fmt - start; | |
1137 | ||
1138 | case 's': | |
1139 | spec->type = FORMAT_TYPE_STR; | |
1140 | return ++fmt - start; | |
1141 | ||
1142 | case 'p': | |
1143 | spec->type = FORMAT_TYPE_PTR; | |
1144 | return fmt - start; | |
1145 | /* skip alnum */ | |
1146 | ||
1147 | case 'n': | |
1148 | spec->type = FORMAT_TYPE_NRCHARS; | |
1149 | return ++fmt - start; | |
1150 | ||
1151 | case '%': | |
1152 | spec->type = FORMAT_TYPE_PERCENT_CHAR; | |
1153 | return ++fmt - start; | |
1154 | ||
1155 | /* integer number formats - set up the flags and "break" */ | |
1156 | case 'o': | |
1157 | spec->base = 8; | |
1158 | break; | |
1159 | ||
1160 | case 'x': | |
1161 | spec->flags |= SMALL; | |
1162 | ||
1163 | case 'X': | |
1164 | spec->base = 16; | |
1165 | break; | |
1166 | ||
1167 | case 'd': | |
1168 | case 'i': | |
39e874f8 | 1169 | spec->flags |= SIGN; |
fef20d9c | 1170 | case 'u': |
4aa99606 | 1171 | break; |
fef20d9c FW |
1172 | |
1173 | default: | |
1174 | spec->type = FORMAT_TYPE_INVALID; | |
1175 | return fmt - start; | |
0fe1ef24 | 1176 | } |
fef20d9c FW |
1177 | |
1178 | if (spec->qualifier == 'L') | |
1179 | spec->type = FORMAT_TYPE_LONG_LONG; | |
1180 | else if (spec->qualifier == 'l') { | |
39e874f8 | 1181 | if (spec->flags & SIGN) |
fef20d9c FW |
1182 | spec->type = FORMAT_TYPE_LONG; |
1183 | else | |
1184 | spec->type = FORMAT_TYPE_ULONG; | |
08562cb2 | 1185 | } else if (TOLOWER(spec->qualifier) == 'z') { |
fef20d9c FW |
1186 | spec->type = FORMAT_TYPE_SIZE_T; |
1187 | } else if (spec->qualifier == 't') { | |
1188 | spec->type = FORMAT_TYPE_PTRDIFF; | |
a4e94ef0 Z |
1189 | } else if (spec->qualifier == 'H') { |
1190 | if (spec->flags & SIGN) | |
1191 | spec->type = FORMAT_TYPE_BYTE; | |
1192 | else | |
1193 | spec->type = FORMAT_TYPE_UBYTE; | |
fef20d9c | 1194 | } else if (spec->qualifier == 'h') { |
39e874f8 | 1195 | if (spec->flags & SIGN) |
fef20d9c FW |
1196 | spec->type = FORMAT_TYPE_SHORT; |
1197 | else | |
1198 | spec->type = FORMAT_TYPE_USHORT; | |
1199 | } else { | |
39e874f8 | 1200 | if (spec->flags & SIGN) |
fef20d9c FW |
1201 | spec->type = FORMAT_TYPE_INT; |
1202 | else | |
1203 | spec->type = FORMAT_TYPE_UINT; | |
78a8bf69 | 1204 | } |
fef20d9c FW |
1205 | |
1206 | return ++fmt - start; | |
78a8bf69 LT |
1207 | } |
1208 | ||
1da177e4 LT |
1209 | /** |
1210 | * vsnprintf - Format a string and place it in a buffer | |
1211 | * @buf: The buffer to place the result into | |
1212 | * @size: The size of the buffer, including the trailing null space | |
1213 | * @fmt: The format string to use | |
1214 | * @args: Arguments for the format string | |
1215 | * | |
20036fdc | 1216 | * This function follows C99 vsnprintf, but has some extensions: |
91adcd2c SR |
1217 | * %pS output the name of a text symbol with offset |
1218 | * %ps output the name of a text symbol without offset | |
0c8b946e FW |
1219 | * %pF output the name of a function pointer with its offset |
1220 | * %pf output the name of a function pointer without its offset | |
8a79503a UKK |
1221 | * %pR output the address range in a struct resource with decoded flags |
1222 | * %pr output the address range in a struct resource with raw flags | |
1223 | * %pM output a 6-byte MAC address with colons | |
1224 | * %pm output a 6-byte MAC address without colons | |
1225 | * %pI4 print an IPv4 address without leading zeros | |
1226 | * %pi4 print an IPv4 address with leading zeros | |
1227 | * %pI6 print an IPv6 address with colons | |
1228 | * %pi6 print an IPv6 address without colons | |
1229 | * %pI6c print an IPv6 address as specified by | |
3f472402 | 1230 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
8a79503a UKK |
1231 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
1232 | * case. | |
0efb4d20 | 1233 | * %n is ignored |
20036fdc | 1234 | * |
1da177e4 LT |
1235 | * The return value is the number of characters which would |
1236 | * be generated for the given input, excluding the trailing | |
1237 | * '\0', as per ISO C99. If you want to have the exact | |
1238 | * number of characters written into @buf as return value | |
72fd4a35 | 1239 | * (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4 LT |
1240 | * return is greater than or equal to @size, the resulting |
1241 | * string is truncated. | |
1242 | * | |
1243 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1244 | * You probably want snprintf() instead. |
1da177e4 LT |
1245 | */ |
1246 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1247 | { | |
1da177e4 | 1248 | unsigned long long num; |
d4be151b | 1249 | char *str, *end; |
fef20d9c | 1250 | struct printf_spec spec = {0}; |
1da177e4 | 1251 | |
f796937a JF |
1252 | /* Reject out-of-range values early. Large positive sizes are |
1253 | used for unknown buffer sizes. */ | |
2f30b1f9 | 1254 | if (WARN_ON_ONCE((int) size < 0)) |
1da177e4 | 1255 | return 0; |
1da177e4 LT |
1256 | |
1257 | str = buf; | |
f796937a | 1258 | end = buf + size; |
1da177e4 | 1259 | |
f796937a JF |
1260 | /* Make sure end is always >= buf */ |
1261 | if (end < buf) { | |
1262 | end = ((void *)-1); | |
1263 | size = end - buf; | |
1da177e4 LT |
1264 | } |
1265 | ||
fef20d9c FW |
1266 | while (*fmt) { |
1267 | const char *old_fmt = fmt; | |
d4be151b | 1268 | int read = format_decode(fmt, &spec); |
1da177e4 | 1269 | |
fef20d9c | 1270 | fmt += read; |
1da177e4 | 1271 | |
fef20d9c FW |
1272 | switch (spec.type) { |
1273 | case FORMAT_TYPE_NONE: { | |
1274 | int copy = read; | |
1275 | if (str < end) { | |
1276 | if (copy > end - str) | |
1277 | copy = end - str; | |
1278 | memcpy(str, old_fmt, copy); | |
1da177e4 | 1279 | } |
fef20d9c FW |
1280 | str += read; |
1281 | break; | |
1da177e4 LT |
1282 | } |
1283 | ||
ed681a91 | 1284 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1285 | spec.field_width = va_arg(args, int); |
1286 | break; | |
1da177e4 | 1287 | |
fef20d9c FW |
1288 | case FORMAT_TYPE_PRECISION: |
1289 | spec.precision = va_arg(args, int); | |
1290 | break; | |
1da177e4 | 1291 | |
d4be151b AGR |
1292 | case FORMAT_TYPE_CHAR: { |
1293 | char c; | |
1294 | ||
fef20d9c FW |
1295 | if (!(spec.flags & LEFT)) { |
1296 | while (--spec.field_width > 0) { | |
f796937a | 1297 | if (str < end) |
1da177e4 LT |
1298 | *str = ' '; |
1299 | ++str; | |
1da177e4 | 1300 | |
fef20d9c FW |
1301 | } |
1302 | } | |
1303 | c = (unsigned char) va_arg(args, int); | |
1304 | if (str < end) | |
1305 | *str = c; | |
1306 | ++str; | |
1307 | while (--spec.field_width > 0) { | |
f796937a | 1308 | if (str < end) |
fef20d9c | 1309 | *str = ' '; |
1da177e4 | 1310 | ++str; |
fef20d9c FW |
1311 | } |
1312 | break; | |
d4be151b | 1313 | } |
1da177e4 | 1314 | |
fef20d9c FW |
1315 | case FORMAT_TYPE_STR: |
1316 | str = string(str, end, va_arg(args, char *), spec); | |
1317 | break; | |
1da177e4 | 1318 | |
fef20d9c FW |
1319 | case FORMAT_TYPE_PTR: |
1320 | str = pointer(fmt+1, str, end, va_arg(args, void *), | |
1321 | spec); | |
1322 | while (isalnum(*fmt)) | |
1323 | fmt++; | |
1324 | break; | |
1da177e4 | 1325 | |
fef20d9c FW |
1326 | case FORMAT_TYPE_PERCENT_CHAR: |
1327 | if (str < end) | |
1328 | *str = '%'; | |
1329 | ++str; | |
1330 | break; | |
1da177e4 | 1331 | |
fef20d9c FW |
1332 | case FORMAT_TYPE_INVALID: |
1333 | if (str < end) | |
1334 | *str = '%'; | |
1335 | ++str; | |
fef20d9c FW |
1336 | break; |
1337 | ||
1338 | case FORMAT_TYPE_NRCHARS: { | |
ef0658f3 | 1339 | u8 qualifier = spec.qualifier; |
fef20d9c FW |
1340 | |
1341 | if (qualifier == 'l') { | |
1342 | long *ip = va_arg(args, long *); | |
1343 | *ip = (str - buf); | |
08562cb2 | 1344 | } else if (TOLOWER(qualifier) == 'z') { |
fef20d9c FW |
1345 | size_t *ip = va_arg(args, size_t *); |
1346 | *ip = (str - buf); | |
1347 | } else { | |
1348 | int *ip = va_arg(args, int *); | |
1349 | *ip = (str - buf); | |
1350 | } | |
1351 | break; | |
1da177e4 | 1352 | } |
fef20d9c FW |
1353 | |
1354 | default: | |
1355 | switch (spec.type) { | |
1356 | case FORMAT_TYPE_LONG_LONG: | |
1357 | num = va_arg(args, long long); | |
1358 | break; | |
1359 | case FORMAT_TYPE_ULONG: | |
1360 | num = va_arg(args, unsigned long); | |
1361 | break; | |
1362 | case FORMAT_TYPE_LONG: | |
1363 | num = va_arg(args, long); | |
1364 | break; | |
1365 | case FORMAT_TYPE_SIZE_T: | |
1366 | num = va_arg(args, size_t); | |
1367 | break; | |
1368 | case FORMAT_TYPE_PTRDIFF: | |
1369 | num = va_arg(args, ptrdiff_t); | |
1370 | break; | |
a4e94ef0 Z |
1371 | case FORMAT_TYPE_UBYTE: |
1372 | num = (unsigned char) va_arg(args, int); | |
1373 | break; | |
1374 | case FORMAT_TYPE_BYTE: | |
1375 | num = (signed char) va_arg(args, int); | |
1376 | break; | |
fef20d9c FW |
1377 | case FORMAT_TYPE_USHORT: |
1378 | num = (unsigned short) va_arg(args, int); | |
1379 | break; | |
1380 | case FORMAT_TYPE_SHORT: | |
1381 | num = (short) va_arg(args, int); | |
1382 | break; | |
39e874f8 FW |
1383 | case FORMAT_TYPE_INT: |
1384 | num = (int) va_arg(args, int); | |
fef20d9c FW |
1385 | break; |
1386 | default: | |
1387 | num = va_arg(args, unsigned int); | |
1388 | } | |
1389 | ||
1390 | str = number(str, end, num, spec); | |
1da177e4 | 1391 | } |
1da177e4 | 1392 | } |
fef20d9c | 1393 | |
f796937a JF |
1394 | if (size > 0) { |
1395 | if (str < end) | |
1396 | *str = '\0'; | |
1397 | else | |
0a6047ee | 1398 | end[-1] = '\0'; |
f796937a | 1399 | } |
fef20d9c | 1400 | |
f796937a | 1401 | /* the trailing null byte doesn't count towards the total */ |
1da177e4 | 1402 | return str-buf; |
fef20d9c | 1403 | |
1da177e4 | 1404 | } |
1da177e4 LT |
1405 | EXPORT_SYMBOL(vsnprintf); |
1406 | ||
1407 | /** | |
1408 | * vscnprintf - Format a string and place it in a buffer | |
1409 | * @buf: The buffer to place the result into | |
1410 | * @size: The size of the buffer, including the trailing null space | |
1411 | * @fmt: The format string to use | |
1412 | * @args: Arguments for the format string | |
1413 | * | |
1414 | * The return value is the number of characters which have been written into | |
1415 | * the @buf not including the trailing '\0'. If @size is <= 0 the function | |
1416 | * returns 0. | |
1417 | * | |
1418 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1419 | * You probably want scnprintf() instead. |
20036fdc AK |
1420 | * |
1421 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1422 | */ |
1423 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) | |
1424 | { | |
1425 | int i; | |
1426 | ||
7b9186f5 AGR |
1427 | i = vsnprintf(buf, size, fmt, args); |
1428 | ||
1da177e4 LT |
1429 | return (i >= size) ? (size - 1) : i; |
1430 | } | |
1da177e4 LT |
1431 | EXPORT_SYMBOL(vscnprintf); |
1432 | ||
1433 | /** | |
1434 | * snprintf - Format a string and place it in a buffer | |
1435 | * @buf: The buffer to place the result into | |
1436 | * @size: The size of the buffer, including the trailing null space | |
1437 | * @fmt: The format string to use | |
1438 | * @...: Arguments for the format string | |
1439 | * | |
1440 | * The return value is the number of characters which would be | |
1441 | * generated for the given input, excluding the trailing null, | |
1442 | * as per ISO C99. If the return is greater than or equal to | |
1443 | * @size, the resulting string is truncated. | |
20036fdc AK |
1444 | * |
1445 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1446 | */ |
7b9186f5 | 1447 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1448 | { |
1449 | va_list args; | |
1450 | int i; | |
1451 | ||
1452 | va_start(args, fmt); | |
7b9186f5 | 1453 | i = vsnprintf(buf, size, fmt, args); |
1da177e4 | 1454 | va_end(args); |
7b9186f5 | 1455 | |
1da177e4 LT |
1456 | return i; |
1457 | } | |
1da177e4 LT |
1458 | EXPORT_SYMBOL(snprintf); |
1459 | ||
1460 | /** | |
1461 | * scnprintf - Format a string and place it in a buffer | |
1462 | * @buf: The buffer to place the result into | |
1463 | * @size: The size of the buffer, including the trailing null space | |
1464 | * @fmt: The format string to use | |
1465 | * @...: Arguments for the format string | |
1466 | * | |
1467 | * The return value is the number of characters written into @buf not including | |
ea6f3281 | 1468 | * the trailing '\0'. If @size is <= 0 the function returns 0. |
1da177e4 LT |
1469 | */ |
1470 | ||
7b9186f5 | 1471 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4 LT |
1472 | { |
1473 | va_list args; | |
1474 | int i; | |
1475 | ||
1476 | va_start(args, fmt); | |
1477 | i = vsnprintf(buf, size, fmt, args); | |
1478 | va_end(args); | |
7b9186f5 | 1479 | |
1da177e4 LT |
1480 | return (i >= size) ? (size - 1) : i; |
1481 | } | |
1482 | EXPORT_SYMBOL(scnprintf); | |
1483 | ||
1484 | /** | |
1485 | * vsprintf - Format a string and place it in a buffer | |
1486 | * @buf: The buffer to place the result into | |
1487 | * @fmt: The format string to use | |
1488 | * @args: Arguments for the format string | |
1489 | * | |
1490 | * The function returns the number of characters written | |
72fd4a35 | 1491 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4 LT |
1492 | * buffer overflows. |
1493 | * | |
1494 | * Call this function if you are already dealing with a va_list. | |
72fd4a35 | 1495 | * You probably want sprintf() instead. |
20036fdc AK |
1496 | * |
1497 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 LT |
1498 | */ |
1499 | int vsprintf(char *buf, const char *fmt, va_list args) | |
1500 | { | |
1501 | return vsnprintf(buf, INT_MAX, fmt, args); | |
1502 | } | |
1da177e4 LT |
1503 | EXPORT_SYMBOL(vsprintf); |
1504 | ||
1505 | /** | |
1506 | * sprintf - Format a string and place it in a buffer | |
1507 | * @buf: The buffer to place the result into | |
1508 | * @fmt: The format string to use | |
1509 | * @...: Arguments for the format string | |
1510 | * | |
1511 | * The function returns the number of characters written | |
72fd4a35 | 1512 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4 | 1513 | * buffer overflows. |
20036fdc AK |
1514 | * |
1515 | * See the vsnprintf() documentation for format string extensions over C99. | |
1da177e4 | 1516 | */ |
7b9186f5 | 1517 | int sprintf(char *buf, const char *fmt, ...) |
1da177e4 LT |
1518 | { |
1519 | va_list args; | |
1520 | int i; | |
1521 | ||
1522 | va_start(args, fmt); | |
7b9186f5 | 1523 | i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4 | 1524 | va_end(args); |
7b9186f5 | 1525 | |
1da177e4 LT |
1526 | return i; |
1527 | } | |
1da177e4 LT |
1528 | EXPORT_SYMBOL(sprintf); |
1529 | ||
4370aa4a LJ |
1530 | #ifdef CONFIG_BINARY_PRINTF |
1531 | /* | |
1532 | * bprintf service: | |
1533 | * vbin_printf() - VA arguments to binary data | |
1534 | * bstr_printf() - Binary data to text string | |
1535 | */ | |
1536 | ||
1537 | /** | |
1538 | * vbin_printf - Parse a format string and place args' binary value in a buffer | |
1539 | * @bin_buf: The buffer to place args' binary value | |
1540 | * @size: The size of the buffer(by words(32bits), not characters) | |
1541 | * @fmt: The format string to use | |
1542 | * @args: Arguments for the format string | |
1543 | * | |
1544 | * The format follows C99 vsnprintf, except %n is ignored, and its argument | |
1545 | * is skiped. | |
1546 | * | |
1547 | * The return value is the number of words(32bits) which would be generated for | |
1548 | * the given input. | |
1549 | * | |
1550 | * NOTE: | |
1551 | * If the return value is greater than @size, the resulting bin_buf is NOT | |
1552 | * valid for bstr_printf(). | |
1553 | */ | |
1554 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) | |
1555 | { | |
fef20d9c | 1556 | struct printf_spec spec = {0}; |
4370aa4a | 1557 | char *str, *end; |
4370aa4a LJ |
1558 | |
1559 | str = (char *)bin_buf; | |
1560 | end = (char *)(bin_buf + size); | |
1561 | ||
1562 | #define save_arg(type) \ | |
1563 | do { \ | |
1564 | if (sizeof(type) == 8) { \ | |
1565 | unsigned long long value; \ | |
1566 | str = PTR_ALIGN(str, sizeof(u32)); \ | |
1567 | value = va_arg(args, unsigned long long); \ | |
1568 | if (str + sizeof(type) <= end) { \ | |
1569 | *(u32 *)str = *(u32 *)&value; \ | |
1570 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ | |
1571 | } \ | |
1572 | } else { \ | |
1573 | unsigned long value; \ | |
1574 | str = PTR_ALIGN(str, sizeof(type)); \ | |
1575 | value = va_arg(args, int); \ | |
1576 | if (str + sizeof(type) <= end) \ | |
1577 | *(typeof(type) *)str = (type)value; \ | |
1578 | } \ | |
1579 | str += sizeof(type); \ | |
1580 | } while (0) | |
1581 | ||
fef20d9c | 1582 | while (*fmt) { |
d4be151b | 1583 | int read = format_decode(fmt, &spec); |
4370aa4a | 1584 | |
fef20d9c | 1585 | fmt += read; |
4370aa4a | 1586 | |
fef20d9c FW |
1587 | switch (spec.type) { |
1588 | case FORMAT_TYPE_NONE: | |
d4be151b AGR |
1589 | case FORMAT_TYPE_INVALID: |
1590 | case FORMAT_TYPE_PERCENT_CHAR: | |
fef20d9c FW |
1591 | break; |
1592 | ||
ed681a91 | 1593 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1594 | case FORMAT_TYPE_PRECISION: |
1595 | save_arg(int); | |
1596 | break; | |
1597 | ||
1598 | case FORMAT_TYPE_CHAR: | |
4370aa4a | 1599 | save_arg(char); |
fef20d9c FW |
1600 | break; |
1601 | ||
1602 | case FORMAT_TYPE_STR: { | |
4370aa4a LJ |
1603 | const char *save_str = va_arg(args, char *); |
1604 | size_t len; | |
6c356634 | 1605 | |
4370aa4a LJ |
1606 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
1607 | || (unsigned long)save_str < PAGE_SIZE) | |
0f4f81dc | 1608 | save_str = "(null)"; |
6c356634 AGR |
1609 | len = strlen(save_str) + 1; |
1610 | if (str + len < end) | |
1611 | memcpy(str, save_str, len); | |
1612 | str += len; | |
fef20d9c | 1613 | break; |
4370aa4a | 1614 | } |
fef20d9c FW |
1615 | |
1616 | case FORMAT_TYPE_PTR: | |
4370aa4a LJ |
1617 | save_arg(void *); |
1618 | /* skip all alphanumeric pointer suffixes */ | |
fef20d9c | 1619 | while (isalnum(*fmt)) |
4370aa4a | 1620 | fmt++; |
fef20d9c FW |
1621 | break; |
1622 | ||
fef20d9c | 1623 | case FORMAT_TYPE_NRCHARS: { |
4370aa4a | 1624 | /* skip %n 's argument */ |
ef0658f3 | 1625 | u8 qualifier = spec.qualifier; |
4370aa4a LJ |
1626 | void *skip_arg; |
1627 | if (qualifier == 'l') | |
1628 | skip_arg = va_arg(args, long *); | |
08562cb2 | 1629 | else if (TOLOWER(qualifier) == 'z') |
4370aa4a LJ |
1630 | skip_arg = va_arg(args, size_t *); |
1631 | else | |
1632 | skip_arg = va_arg(args, int *); | |
fef20d9c | 1633 | break; |
4370aa4a | 1634 | } |
fef20d9c FW |
1635 | |
1636 | default: | |
1637 | switch (spec.type) { | |
1638 | ||
1639 | case FORMAT_TYPE_LONG_LONG: | |
4370aa4a | 1640 | save_arg(long long); |
fef20d9c FW |
1641 | break; |
1642 | case FORMAT_TYPE_ULONG: | |
1643 | case FORMAT_TYPE_LONG: | |
4370aa4a | 1644 | save_arg(unsigned long); |
fef20d9c FW |
1645 | break; |
1646 | case FORMAT_TYPE_SIZE_T: | |
4370aa4a | 1647 | save_arg(size_t); |
fef20d9c FW |
1648 | break; |
1649 | case FORMAT_TYPE_PTRDIFF: | |
4370aa4a | 1650 | save_arg(ptrdiff_t); |
fef20d9c | 1651 | break; |
a4e94ef0 Z |
1652 | case FORMAT_TYPE_UBYTE: |
1653 | case FORMAT_TYPE_BYTE: | |
1654 | save_arg(char); | |
1655 | break; | |
fef20d9c FW |
1656 | case FORMAT_TYPE_USHORT: |
1657 | case FORMAT_TYPE_SHORT: | |
4370aa4a | 1658 | save_arg(short); |
fef20d9c FW |
1659 | break; |
1660 | default: | |
4370aa4a | 1661 | save_arg(int); |
fef20d9c | 1662 | } |
4370aa4a LJ |
1663 | } |
1664 | } | |
fef20d9c | 1665 | |
7b9186f5 | 1666 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c | 1667 | #undef save_arg |
4370aa4a LJ |
1668 | } |
1669 | EXPORT_SYMBOL_GPL(vbin_printf); | |
1670 | ||
1671 | /** | |
1672 | * bstr_printf - Format a string from binary arguments and place it in a buffer | |
1673 | * @buf: The buffer to place the result into | |
1674 | * @size: The size of the buffer, including the trailing null space | |
1675 | * @fmt: The format string to use | |
1676 | * @bin_buf: Binary arguments for the format string | |
1677 | * | |
1678 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets | |
1679 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is | |
1680 | * a binary buffer that generated by vbin_printf. | |
1681 | * | |
1682 | * The format follows C99 vsnprintf, but has some extensions: | |
0efb4d20 | 1683 | * see vsnprintf comment for details. |
4370aa4a LJ |
1684 | * |
1685 | * The return value is the number of characters which would | |
1686 | * be generated for the given input, excluding the trailing | |
1687 | * '\0', as per ISO C99. If you want to have the exact | |
1688 | * number of characters written into @buf as return value | |
1689 | * (not including the trailing '\0'), use vscnprintf(). If the | |
1690 | * return is greater than or equal to @size, the resulting | |
1691 | * string is truncated. | |
1692 | */ | |
1693 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) | |
1694 | { | |
fef20d9c | 1695 | struct printf_spec spec = {0}; |
d4be151b AGR |
1696 | char *str, *end; |
1697 | const char *args = (const char *)bin_buf; | |
4370aa4a | 1698 | |
2f30b1f9 | 1699 | if (WARN_ON_ONCE((int) size < 0)) |
4370aa4a | 1700 | return 0; |
4370aa4a LJ |
1701 | |
1702 | str = buf; | |
1703 | end = buf + size; | |
1704 | ||
1705 | #define get_arg(type) \ | |
1706 | ({ \ | |
1707 | typeof(type) value; \ | |
1708 | if (sizeof(type) == 8) { \ | |
1709 | args = PTR_ALIGN(args, sizeof(u32)); \ | |
1710 | *(u32 *)&value = *(u32 *)args; \ | |
1711 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ | |
1712 | } else { \ | |
1713 | args = PTR_ALIGN(args, sizeof(type)); \ | |
1714 | value = *(typeof(type) *)args; \ | |
1715 | } \ | |
1716 | args += sizeof(type); \ | |
1717 | value; \ | |
1718 | }) | |
1719 | ||
1720 | /* Make sure end is always >= buf */ | |
1721 | if (end < buf) { | |
1722 | end = ((void *)-1); | |
1723 | size = end - buf; | |
1724 | } | |
1725 | ||
fef20d9c | 1726 | while (*fmt) { |
fef20d9c | 1727 | const char *old_fmt = fmt; |
d4be151b | 1728 | int read = format_decode(fmt, &spec); |
4370aa4a | 1729 | |
fef20d9c | 1730 | fmt += read; |
4370aa4a | 1731 | |
fef20d9c FW |
1732 | switch (spec.type) { |
1733 | case FORMAT_TYPE_NONE: { | |
1734 | int copy = read; | |
1735 | if (str < end) { | |
1736 | if (copy > end - str) | |
1737 | copy = end - str; | |
1738 | memcpy(str, old_fmt, copy); | |
4370aa4a | 1739 | } |
fef20d9c FW |
1740 | str += read; |
1741 | break; | |
4370aa4a LJ |
1742 | } |
1743 | ||
ed681a91 | 1744 | case FORMAT_TYPE_WIDTH: |
fef20d9c FW |
1745 | spec.field_width = get_arg(int); |
1746 | break; | |
4370aa4a | 1747 | |
fef20d9c FW |
1748 | case FORMAT_TYPE_PRECISION: |
1749 | spec.precision = get_arg(int); | |
1750 | break; | |
4370aa4a | 1751 | |
d4be151b AGR |
1752 | case FORMAT_TYPE_CHAR: { |
1753 | char c; | |
1754 | ||
fef20d9c FW |
1755 | if (!(spec.flags & LEFT)) { |
1756 | while (--spec.field_width > 0) { | |
4370aa4a LJ |
1757 | if (str < end) |
1758 | *str = ' '; | |
1759 | ++str; | |
1760 | } | |
1761 | } | |
1762 | c = (unsigned char) get_arg(char); | |
1763 | if (str < end) | |
1764 | *str = c; | |
1765 | ++str; | |
fef20d9c | 1766 | while (--spec.field_width > 0) { |
4370aa4a LJ |
1767 | if (str < end) |
1768 | *str = ' '; | |
1769 | ++str; | |
1770 | } | |
fef20d9c | 1771 | break; |
d4be151b | 1772 | } |
4370aa4a | 1773 | |
fef20d9c | 1774 | case FORMAT_TYPE_STR: { |
4370aa4a | 1775 | const char *str_arg = args; |
d4be151b | 1776 | args += strlen(str_arg) + 1; |
fef20d9c FW |
1777 | str = string(str, end, (char *)str_arg, spec); |
1778 | break; | |
4370aa4a LJ |
1779 | } |
1780 | ||
fef20d9c FW |
1781 | case FORMAT_TYPE_PTR: |
1782 | str = pointer(fmt+1, str, end, get_arg(void *), spec); | |
1783 | while (isalnum(*fmt)) | |
4370aa4a | 1784 | fmt++; |
fef20d9c | 1785 | break; |
4370aa4a | 1786 | |
fef20d9c | 1787 | case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c | 1788 | case FORMAT_TYPE_INVALID: |
4370aa4a LJ |
1789 | if (str < end) |
1790 | *str = '%'; | |
1791 | ++str; | |
fef20d9c FW |
1792 | break; |
1793 | ||
1794 | case FORMAT_TYPE_NRCHARS: | |
1795 | /* skip */ | |
1796 | break; | |
1797 | ||
d4be151b AGR |
1798 | default: { |
1799 | unsigned long long num; | |
1800 | ||
fef20d9c FW |
1801 | switch (spec.type) { |
1802 | ||
1803 | case FORMAT_TYPE_LONG_LONG: | |
1804 | num = get_arg(long long); | |
1805 | break; | |
1806 | case FORMAT_TYPE_ULONG: | |
fef20d9c FW |
1807 | case FORMAT_TYPE_LONG: |
1808 | num = get_arg(unsigned long); | |
1809 | break; | |
1810 | case FORMAT_TYPE_SIZE_T: | |
1811 | num = get_arg(size_t); | |
1812 | break; | |
1813 | case FORMAT_TYPE_PTRDIFF: | |
1814 | num = get_arg(ptrdiff_t); | |
1815 | break; | |
a4e94ef0 Z |
1816 | case FORMAT_TYPE_UBYTE: |
1817 | num = get_arg(unsigned char); | |
1818 | break; | |
1819 | case FORMAT_TYPE_BYTE: | |
1820 | num = get_arg(signed char); | |
1821 | break; | |
fef20d9c FW |
1822 | case FORMAT_TYPE_USHORT: |
1823 | num = get_arg(unsigned short); | |
1824 | break; | |
1825 | case FORMAT_TYPE_SHORT: | |
1826 | num = get_arg(short); | |
1827 | break; | |
1828 | case FORMAT_TYPE_UINT: | |
1829 | num = get_arg(unsigned int); | |
1830 | break; | |
1831 | default: | |
1832 | num = get_arg(int); | |
1833 | } | |
1834 | ||
1835 | str = number(str, end, num, spec); | |
d4be151b AGR |
1836 | } /* default: */ |
1837 | } /* switch(spec.type) */ | |
1838 | } /* while(*fmt) */ | |
fef20d9c | 1839 | |
4370aa4a LJ |
1840 | if (size > 0) { |
1841 | if (str < end) | |
1842 | *str = '\0'; | |
1843 | else | |
1844 | end[-1] = '\0'; | |
1845 | } | |
fef20d9c | 1846 | |
4370aa4a LJ |
1847 | #undef get_arg |
1848 | ||
1849 | /* the trailing null byte doesn't count towards the total */ | |
1850 | return str - buf; | |
1851 | } | |
1852 | EXPORT_SYMBOL_GPL(bstr_printf); | |
1853 | ||
1854 | /** | |
1855 | * bprintf - Parse a format string and place args' binary value in a buffer | |
1856 | * @bin_buf: The buffer to place args' binary value | |
1857 | * @size: The size of the buffer(by words(32bits), not characters) | |
1858 | * @fmt: The format string to use | |
1859 | * @...: Arguments for the format string | |
1860 | * | |
1861 | * The function returns the number of words(u32) written | |
1862 | * into @bin_buf. | |
1863 | */ | |
1864 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) | |
1865 | { | |
1866 | va_list args; | |
1867 | int ret; | |
1868 | ||
1869 | va_start(args, fmt); | |
1870 | ret = vbin_printf(bin_buf, size, fmt, args); | |
1871 | va_end(args); | |
7b9186f5 | 1872 | |
4370aa4a LJ |
1873 | return ret; |
1874 | } | |
1875 | EXPORT_SYMBOL_GPL(bprintf); | |
1876 | ||
1877 | #endif /* CONFIG_BINARY_PRINTF */ | |
1878 | ||
1da177e4 LT |
1879 | /** |
1880 | * vsscanf - Unformat a buffer into a list of arguments | |
1881 | * @buf: input buffer | |
1882 | * @fmt: format of buffer | |
1883 | * @args: arguments | |
1884 | */ | |
7b9186f5 | 1885 | int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4 LT |
1886 | { |
1887 | const char *str = buf; | |
1888 | char *next; | |
1889 | char digit; | |
1890 | int num = 0; | |
ef0658f3 JP |
1891 | u8 qualifier; |
1892 | u8 base; | |
1893 | s16 field_width; | |
d4be151b | 1894 | bool is_sign; |
1da177e4 | 1895 | |
7b9186f5 | 1896 | while (*fmt && *str) { |
1da177e4 LT |
1897 | /* skip any white space in format */ |
1898 | /* white space in format matchs any amount of | |
1899 | * white space, including none, in the input. | |
1900 | */ | |
1901 | if (isspace(*fmt)) { | |
e7d2860b AGR |
1902 | fmt = skip_spaces(++fmt); |
1903 | str = skip_spaces(str); | |
1da177e4 LT |
1904 | } |
1905 | ||
1906 | /* anything that is not a conversion must match exactly */ | |
1907 | if (*fmt != '%' && *fmt) { | |
1908 | if (*fmt++ != *str++) | |
1909 | break; | |
1910 | continue; | |
1911 | } | |
1912 | ||
1913 | if (!*fmt) | |
1914 | break; | |
1915 | ++fmt; | |
7b9186f5 | 1916 | |
1da177e4 LT |
1917 | /* skip this conversion. |
1918 | * advance both strings to next white space | |
1919 | */ | |
1920 | if (*fmt == '*') { | |
8fccae2c | 1921 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4 LT |
1922 | fmt++; |
1923 | while (!isspace(*str) && *str) | |
1924 | str++; | |
1925 | continue; | |
1926 | } | |
1927 | ||
1928 | /* get field width */ | |
1929 | field_width = -1; | |
1930 | if (isdigit(*fmt)) | |
1931 | field_width = skip_atoi(&fmt); | |
1932 | ||
1933 | /* get conversion qualifier */ | |
1934 | qualifier = -1; | |
08562cb2 AGR |
1935 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
1936 | TOLOWER(*fmt) == 'z') { | |
1da177e4 LT |
1937 | qualifier = *fmt++; |
1938 | if (unlikely(qualifier == *fmt)) { | |
1939 | if (qualifier == 'h') { | |
1940 | qualifier = 'H'; | |
1941 | fmt++; | |
1942 | } else if (qualifier == 'l') { | |
1943 | qualifier = 'L'; | |
1944 | fmt++; | |
1945 | } | |
1946 | } | |
1947 | } | |
1da177e4 LT |
1948 | |
1949 | if (!*fmt || !*str) | |
1950 | break; | |
1951 | ||
d4be151b AGR |
1952 | base = 10; |
1953 | is_sign = 0; | |
1954 | ||
7b9186f5 | 1955 | switch (*fmt++) { |
1da177e4 LT |
1956 | case 'c': |
1957 | { | |
7b9186f5 | 1958 | char *s = (char *)va_arg(args, char*); |
1da177e4 LT |
1959 | if (field_width == -1) |
1960 | field_width = 1; | |
1961 | do { | |
1962 | *s++ = *str++; | |
1963 | } while (--field_width > 0 && *str); | |
1964 | num++; | |
1965 | } | |
1966 | continue; | |
1967 | case 's': | |
1968 | { | |
7b9186f5 AGR |
1969 | char *s = (char *)va_arg(args, char *); |
1970 | if (field_width == -1) | |
ef0658f3 | 1971 | field_width = SHORT_MAX; |
1da177e4 | 1972 | /* first, skip leading white space in buffer */ |
e7d2860b | 1973 | str = skip_spaces(str); |
1da177e4 LT |
1974 | |
1975 | /* now copy until next white space */ | |
7b9186f5 | 1976 | while (*str && !isspace(*str) && field_width--) |
1da177e4 | 1977 | *s++ = *str++; |
1da177e4 LT |
1978 | *s = '\0'; |
1979 | num++; | |
1980 | } | |
1981 | continue; | |
1982 | case 'n': | |
1983 | /* return number of characters read so far */ | |
1984 | { | |
7b9186f5 | 1985 | int *i = (int *)va_arg(args, int*); |
1da177e4 LT |
1986 | *i = str - buf; |
1987 | } | |
1988 | continue; | |
1989 | case 'o': | |
1990 | base = 8; | |
1991 | break; | |
1992 | case 'x': | |
1993 | case 'X': | |
1994 | base = 16; | |
1995 | break; | |
1996 | case 'i': | |
7b9186f5 | 1997 | base = 0; |
1da177e4 LT |
1998 | case 'd': |
1999 | is_sign = 1; | |
2000 | case 'u': | |
2001 | break; | |
2002 | case '%': | |
2003 | /* looking for '%' in str */ | |
7b9186f5 | 2004 | if (*str++ != '%') |
1da177e4 LT |
2005 | return num; |
2006 | continue; | |
2007 | default: | |
2008 | /* invalid format; stop here */ | |
2009 | return num; | |
2010 | } | |
2011 | ||
2012 | /* have some sort of integer conversion. | |
2013 | * first, skip white space in buffer. | |
2014 | */ | |
e7d2860b | 2015 | str = skip_spaces(str); |
1da177e4 LT |
2016 | |
2017 | digit = *str; | |
2018 | if (is_sign && digit == '-') | |
2019 | digit = *(str + 1); | |
2020 | ||
2021 | if (!digit | |
7b9186f5 AGR |
2022 | || (base == 16 && !isxdigit(digit)) |
2023 | || (base == 10 && !isdigit(digit)) | |
2024 | || (base == 8 && (!isdigit(digit) || digit > '7')) | |
2025 | || (base == 0 && !isdigit(digit))) | |
2026 | break; | |
1da177e4 | 2027 | |
7b9186f5 | 2028 | switch (qualifier) { |
1da177e4 LT |
2029 | case 'H': /* that's 'hh' in format */ |
2030 | if (is_sign) { | |
7b9186f5 AGR |
2031 | signed char *s = (signed char *)va_arg(args, signed char *); |
2032 | *s = (signed char)simple_strtol(str, &next, base); | |
1da177e4 | 2033 | } else { |
7b9186f5 AGR |
2034 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
2035 | *s = (unsigned char)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2036 | } |
2037 | break; | |
2038 | case 'h': | |
2039 | if (is_sign) { | |
7b9186f5 AGR |
2040 | short *s = (short *)va_arg(args, short *); |
2041 | *s = (short)simple_strtol(str, &next, base); | |
1da177e4 | 2042 | } else { |
7b9186f5 AGR |
2043 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
2044 | *s = (unsigned short)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2045 | } |
2046 | break; | |
2047 | case 'l': | |
2048 | if (is_sign) { | |
7b9186f5 AGR |
2049 | long *l = (long *)va_arg(args, long *); |
2050 | *l = simple_strtol(str, &next, base); | |
1da177e4 | 2051 | } else { |
7b9186f5 AGR |
2052 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
2053 | *l = simple_strtoul(str, &next, base); | |
1da177e4 LT |
2054 | } |
2055 | break; | |
2056 | case 'L': | |
2057 | if (is_sign) { | |
7b9186f5 AGR |
2058 | long long *l = (long long *)va_arg(args, long long *); |
2059 | *l = simple_strtoll(str, &next, base); | |
1da177e4 | 2060 | } else { |
7b9186f5 AGR |
2061 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
2062 | *l = simple_strtoull(str, &next, base); | |
1da177e4 LT |
2063 | } |
2064 | break; | |
2065 | case 'Z': | |
2066 | case 'z': | |
2067 | { | |
7b9186f5 AGR |
2068 | size_t *s = (size_t *)va_arg(args, size_t *); |
2069 | *s = (size_t)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2070 | } |
2071 | break; | |
2072 | default: | |
2073 | if (is_sign) { | |
7b9186f5 AGR |
2074 | int *i = (int *)va_arg(args, int *); |
2075 | *i = (int)simple_strtol(str, &next, base); | |
1da177e4 | 2076 | } else { |
7b9186f5 AGR |
2077 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
2078 | *i = (unsigned int)simple_strtoul(str, &next, base); | |
1da177e4 LT |
2079 | } |
2080 | break; | |
2081 | } | |
2082 | num++; | |
2083 | ||
2084 | if (!next) | |
2085 | break; | |
2086 | str = next; | |
2087 | } | |
c6b40d16 JB |
2088 | |
2089 | /* | |
2090 | * Now we've come all the way through so either the input string or the | |
2091 | * format ended. In the former case, there can be a %n at the current | |
2092 | * position in the format that needs to be filled. | |
2093 | */ | |
2094 | if (*fmt == '%' && *(fmt + 1) == 'n') { | |
2095 | int *p = (int *)va_arg(args, int *); | |
2096 | *p = str - buf; | |
2097 | } | |
2098 | ||
1da177e4 LT |
2099 | return num; |
2100 | } | |
1da177e4 LT |
2101 | EXPORT_SYMBOL(vsscanf); |
2102 | ||
2103 | /** | |
2104 | * sscanf - Unformat a buffer into a list of arguments | |
2105 | * @buf: input buffer | |
2106 | * @fmt: formatting of buffer | |
2107 | * @...: resulting arguments | |
2108 | */ | |
7b9186f5 | 2109 | int sscanf(const char *buf, const char *fmt, ...) |
1da177e4 LT |
2110 | { |
2111 | va_list args; | |
2112 | int i; | |
2113 | ||
7b9186f5 AGR |
2114 | va_start(args, fmt); |
2115 | i = vsscanf(buf, fmt, args); | |
1da177e4 | 2116 | va_end(args); |
7b9186f5 | 2117 | |
1da177e4 LT |
2118 | return i; |
2119 | } | |
1da177e4 | 2120 | EXPORT_SYMBOL(sscanf); |