blob: 3b924ec5e0d608ee09dd67faa9ff118886a1fa90 [file] [log] [blame]
wdenk153d5112002-08-30 11:07:04 +00001/*
2 * linux/lib/vsprintf.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
8/*
9 * Wirzenius wrote this portably, Torvalds fucked it up :-)
10 */
11
12#include <stdarg.h>
13#include <linux/types.h>
14#include <linux/string.h>
15#include <linux/ctype.h>
Heiko Schochera7fd0d92011-05-02 21:33:49 +000016#include <errno.h>
wdenk153d5112002-08-30 11:07:04 +000017
18#include <common.h>
19#if !defined (CONFIG_PANIC_HANG)
20#include <command.h>
wdenk153d5112002-08-30 11:07:04 +000021#endif
22
Dirk Behme47910502009-07-22 17:51:56 +020023#include <div64.h>
Mike Frysinger6c6166f2009-02-16 23:21:36 -050024# define NUM_TYPE long long
Dirk Behme47910502009-07-22 17:51:56 +020025#define noinline __attribute__((noinline))
26
Mike Frysinger6c6166f2009-02-16 23:21:36 -050027const char hex_asc[] = "0123456789abcdef";
28#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
29#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
30
31static inline char *pack_hex_byte(char *buf, u8 byte)
32{
33 *buf++ = hex_asc_hi(byte);
34 *buf++ = hex_asc_lo(byte);
35 return buf;
36}
37
wdenk153d5112002-08-30 11:07:04 +000038unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
39{
40 unsigned long result = 0,value;
41
42 if (*cp == '0') {
43 cp++;
44 if ((*cp == 'x') && isxdigit(cp[1])) {
45 base = 16;
46 cp++;
47 }
48 if (!base) {
49 base = 8;
50 }
51 }
52 if (!base) {
53 base = 10;
54 }
55 while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
56 ? toupper(*cp) : *cp)-'A'+10) < base) {
57 result = result*base + value;
58 cp++;
59 }
60 if (endp)
61 *endp = (char *)cp;
62 return result;
63}
64
Heiko Schochera7fd0d92011-05-02 21:33:49 +000065/**
66 * strict_strtoul - convert a string to an unsigned long strictly
67 * @cp: The string to be converted
68 * @base: The number base to use
69 * @res: The converted result value
70 *
71 * strict_strtoul converts a string to an unsigned long only if the
72 * string is really an unsigned long string, any string containing
73 * any invalid char at the tail will be rejected and -EINVAL is returned,
74 * only a newline char at the tail is acceptible because people generally
75 * change a module parameter in the following way:
76 *
77 * echo 1024 > /sys/module/e1000/parameters/copybreak
78 *
79 * echo will append a newline to the tail.
80 *
81 * It returns 0 if conversion is successful and *res is set to the converted
82 * value, otherwise it returns -EINVAL and *res is set to 0.
83 *
84 * simple_strtoul just ignores the successive invalid characters and
85 * return the converted value of prefix part of the string.
86 *
87 * Copied this function from Linux 2.6.38 commit ID:
88 * 521cb40b0c44418a4fd36dc633f575813d59a43d
89 *
90 */
91int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
92{
93 char *tail;
94 unsigned long val;
95 size_t len;
96
97 *res = 0;
98 len = strlen(cp);
99 if (len == 0)
100 return -EINVAL;
101
102 val = simple_strtoul(cp, &tail, base);
103 if (tail == cp)
104 return -EINVAL;
105
106 if ((*tail == '\0') ||
107 ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
108 *res = val;
109 return 0;
110 }
111
112 return -EINVAL;
113}
114
wdenk153d5112002-08-30 11:07:04 +0000115long simple_strtol(const char *cp,char **endp,unsigned int base)
116{
117 if(*cp=='-')
118 return -simple_strtoul(cp+1,endp,base);
119 return simple_strtoul(cp,endp,base);
120}
121
Kyungmin Park7e6ee7a2008-11-19 16:32:36 +0100122int ustrtoul(const char *cp, char **endp, unsigned int base)
123{
124 unsigned long result = simple_strtoul(cp, endp, base);
125 switch (**endp) {
126 case 'G' :
127 result *= 1024;
128 /* fall through */
129 case 'M':
130 result *= 1024;
131 /* fall through */
132 case 'K':
133 case 'k':
134 result *= 1024;
135 if ((*endp)[1] == 'i') {
136 if ((*endp)[2] == 'B')
137 (*endp) += 3;
138 else
139 (*endp) += 2;
140 }
141 }
142 return result;
143}
144
wdenkc40b2952004-03-13 23:29:43 +0000145unsigned long long simple_strtoull (const char *cp, char **endp, unsigned int base)
146{
147 unsigned long long result = 0, value;
148
149 if (*cp == '0') {
150 cp++;
151 if ((*cp == 'x') && isxdigit (cp[1])) {
152 base = 16;
153 cp++;
154 }
155 if (!base) {
156 base = 8;
157 }
158 }
159 if (!base) {
160 base = 10;
161 }
162 while (isxdigit (*cp) && (value = isdigit (*cp)
163 ? *cp - '0'
164 : (islower (*cp) ? toupper (*cp) : *cp) - 'A' + 10) < base) {
165 result = result * base + value;
166 cp++;
167 }
168 if (endp)
169 *endp = (char *) cp;
170 return result;
171}
wdenkc40b2952004-03-13 23:29:43 +0000172
wdenk153d5112002-08-30 11:07:04 +0000173/* we use this so that we can do without the ctype library */
174#define is_digit(c) ((c) >= '0' && (c) <= '9')
175
176static int skip_atoi(const char **s)
177{
178 int i=0;
179
180 while (is_digit(**s))
181 i = i*10 + *((*s)++) - '0';
182 return i;
183}
184
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500185/* Decimal conversion is by far the most typical, and is used
186 * for /proc and /sys data. This directly impacts e.g. top performance
187 * with many processes running. We optimize it for speed
188 * using code from
189 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
190 * (with permission from the author, Douglas W. Jones). */
191
192/* Formats correctly any integer in [0,99999].
193 * Outputs from one to five digits depending on input.
194 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
195static char* put_dec_trunc(char *buf, unsigned q)
196{
197 unsigned d3, d2, d1, d0;
198 d1 = (q>>4) & 0xf;
199 d2 = (q>>8) & 0xf;
200 d3 = (q>>12);
201
202 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
203 q = (d0 * 0xcd) >> 11;
204 d0 = d0 - 10*q;
205 *buf++ = d0 + '0'; /* least significant digit */
206 d1 = q + 9*d3 + 5*d2 + d1;
207 if (d1 != 0) {
208 q = (d1 * 0xcd) >> 11;
209 d1 = d1 - 10*q;
210 *buf++ = d1 + '0'; /* next digit */
211
212 d2 = q + 2*d2;
213 if ((d2 != 0) || (d3 != 0)) {
214 q = (d2 * 0xd) >> 7;
215 d2 = d2 - 10*q;
216 *buf++ = d2 + '0'; /* next digit */
217
218 d3 = q + 4*d3;
219 if (d3 != 0) {
220 q = (d3 * 0xcd) >> 11;
221 d3 = d3 - 10*q;
222 *buf++ = d3 + '0'; /* next digit */
223 if (q != 0)
224 *buf++ = q + '0'; /* most sign. digit */
225 }
226 }
227 }
228 return buf;
229}
230/* Same with if's removed. Always emits five digits */
231static char* put_dec_full(char *buf, unsigned q)
232{
233 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
234 /* but anyway, gcc produces better code with full-sized ints */
235 unsigned d3, d2, d1, d0;
236 d1 = (q>>4) & 0xf;
237 d2 = (q>>8) & 0xf;
238 d3 = (q>>12);
239
Wolfgang Denkc0a14ae2009-04-05 00:27:57 +0200240 /*
241 * Possible ways to approx. divide by 10
242 * gcc -O2 replaces multiply with shifts and adds
243 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
244 * (x * 0x67) >> 10: 1100111
245 * (x * 0x34) >> 9: 110100 - same
246 * (x * 0x1a) >> 8: 11010 - same
247 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
248 */
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500249
250 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
251 q = (d0 * 0xcd) >> 11;
252 d0 = d0 - 10*q;
253 *buf++ = d0 + '0';
254 d1 = q + 9*d3 + 5*d2 + d1;
255 q = (d1 * 0xcd) >> 11;
256 d1 = d1 - 10*q;
257 *buf++ = d1 + '0';
258
259 d2 = q + 2*d2;
260 q = (d2 * 0xd) >> 7;
261 d2 = d2 - 10*q;
262 *buf++ = d2 + '0';
263
264 d3 = q + 4*d3;
265 q = (d3 * 0xcd) >> 11; /* - shorter code */
266 /* q = (d3 * 0x67) >> 10; - would also work */
267 d3 = d3 - 10*q;
268 *buf++ = d3 + '0';
269 *buf++ = q + '0';
270 return buf;
271}
272/* No inlining helps gcc to use registers better */
273static noinline char* put_dec(char *buf, unsigned NUM_TYPE num)
274{
275 while (1) {
276 unsigned rem;
277 if (num < 100000)
278 return put_dec_trunc(buf, num);
279 rem = do_div(num, 100000);
280 buf = put_dec_full(buf, rem);
281 }
282}
283
wdenk153d5112002-08-30 11:07:04 +0000284#define ZEROPAD 1 /* pad with zero */
285#define SIGN 2 /* unsigned/signed long */
286#define PLUS 4 /* show plus */
287#define SPACE 8 /* space if plus */
288#define LEFT 16 /* left justified */
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500289#define SMALL 32 /* Must be 32 == 0x20 */
290#define SPECIAL 64 /* 0x */
wdenk153d5112002-08-30 11:07:04 +0000291
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500292static char *number(char *buf, unsigned NUM_TYPE num, int base, int size, int precision, int type)
wdenk153d5112002-08-30 11:07:04 +0000293{
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500294 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
295 static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
296
297 char tmp[66];
298 char sign;
299 char locase;
300 int need_pfx = ((type & SPECIAL) && base != 10);
wdenk153d5112002-08-30 11:07:04 +0000301 int i;
302
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500303 /* locase = 0 or 0x20. ORing digits or letters with 'locase'
304 * produces same digits or (maybe lowercased) letters */
305 locase = (type & SMALL);
wdenk153d5112002-08-30 11:07:04 +0000306 if (type & LEFT)
307 type &= ~ZEROPAD;
wdenk153d5112002-08-30 11:07:04 +0000308 sign = 0;
309 if (type & SIGN) {
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500310 if ((signed NUM_TYPE) num < 0) {
wdenk153d5112002-08-30 11:07:04 +0000311 sign = '-';
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500312 num = - (signed NUM_TYPE) num;
wdenk153d5112002-08-30 11:07:04 +0000313 size--;
314 } else if (type & PLUS) {
315 sign = '+';
316 size--;
317 } else if (type & SPACE) {
318 sign = ' ';
319 size--;
320 }
321 }
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500322 if (need_pfx) {
323 size--;
wdenk153d5112002-08-30 11:07:04 +0000324 if (base == 16)
wdenk153d5112002-08-30 11:07:04 +0000325 size--;
326 }
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500327
328 /* generate full string in tmp[], in reverse order */
wdenk153d5112002-08-30 11:07:04 +0000329 i = 0;
330 if (num == 0)
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500331 tmp[i++] = '0';
332 /* Generic code, for any base:
333 else do {
334 tmp[i++] = (digits[do_div(num,base)] | locase);
335 } while (num != 0);
336 */
337 else if (base != 10) { /* 8 or 16 */
338 int mask = base - 1;
339 int shift = 3;
340 if (base == 16) shift = 4;
341 do {
342 tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
343 num >>= shift;
344 } while (num);
345 } else { /* base 10 */
346 i = put_dec(tmp, num) - tmp;
347 }
348
349 /* printing 100 using %2d gives "100", not "00" */
wdenk153d5112002-08-30 11:07:04 +0000350 if (i > precision)
351 precision = i;
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500352 /* leading space padding */
wdenk153d5112002-08-30 11:07:04 +0000353 size -= precision;
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500354 if (!(type & (ZEROPAD+LEFT)))
355 while(--size >= 0)
356 *buf++ = ' ';
357 /* sign */
wdenk153d5112002-08-30 11:07:04 +0000358 if (sign)
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500359 *buf++ = sign;
360 /* "0x" / "0" prefix */
361 if (need_pfx) {
362 *buf++ = '0';
363 if (base == 16)
364 *buf++ = ('X' | locase);
wdenk153d5112002-08-30 11:07:04 +0000365 }
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500366 /* zero or space padding */
367 if (!(type & LEFT)) {
368 char c = (type & ZEROPAD) ? '0' : ' ';
369 while (--size >= 0)
370 *buf++ = c;
371 }
372 /* hmm even more zero padding? */
373 while (i <= --precision)
374 *buf++ = '0';
375 /* actual digits of result */
376 while (--i >= 0)
377 *buf++ = tmp[i];
378 /* trailing space padding */
379 while (--size >= 0)
380 *buf++ = ' ';
381 return buf;
wdenk153d5112002-08-30 11:07:04 +0000382}
383
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500384static char *string(char *buf, char *s, int field_width, int precision, int flags)
385{
386 int len, i;
wdenk153d5112002-08-30 11:07:04 +0000387
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500388 if (s == 0)
389 s = "<NULL>";
390
391 len = strnlen(s, precision);
392
393 if (!(flags & LEFT))
394 while (len < field_width--)
395 *buf++ = ' ';
396 for (i = 0; i < len; ++i)
397 *buf++ = *s++;
398 while (len < field_width--)
399 *buf++ = ' ';
400 return buf;
401}
402
403#ifdef CONFIG_CMD_NET
404static char *mac_address_string(char *buf, u8 *addr, int field_width,
405 int precision, int flags)
406{
407 char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
408 char *p = mac_addr;
409 int i;
410
411 for (i = 0; i < 6; i++) {
412 p = pack_hex_byte(p, addr[i]);
413 if (!(flags & SPECIAL) && i != 5)
414 *p++ = ':';
415 }
416 *p = '\0';
417
418 return string(buf, mac_addr, field_width, precision, flags & ~SPECIAL);
419}
420
421static char *ip6_addr_string(char *buf, u8 *addr, int field_width,
422 int precision, int flags)
423{
424 char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
425 char *p = ip6_addr;
426 int i;
427
428 for (i = 0; i < 8; i++) {
429 p = pack_hex_byte(p, addr[2 * i]);
430 p = pack_hex_byte(p, addr[2 * i + 1]);
431 if (!(flags & SPECIAL) && i != 7)
432 *p++ = ':';
433 }
434 *p = '\0';
435
436 return string(buf, ip6_addr, field_width, precision, flags & ~SPECIAL);
437}
438
439static char *ip4_addr_string(char *buf, u8 *addr, int field_width,
440 int precision, int flags)
441{
442 char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
443 char temp[3]; /* hold each IP quad in reverse order */
444 char *p = ip4_addr;
445 int i, digits;
446
447 for (i = 0; i < 4; i++) {
448 digits = put_dec_trunc(temp, addr[i]) - temp;
449 /* reverse the digits in the quad */
450 while (digits--)
451 *p++ = temp[digits];
452 if (i != 3)
453 *p++ = '.';
454 }
455 *p = '\0';
456
457 return string(buf, ip4_addr, field_width, precision, flags & ~SPECIAL);
458}
459#endif
460
461/*
462 * Show a '%p' thing. A kernel extension is that the '%p' is followed
463 * by an extra set of alphanumeric characters that are extended format
464 * specifiers.
465 *
466 * Right now we handle:
467 *
468 * - 'M' For a 6-byte MAC address, it prints the address in the
469 * usual colon-separated hex notation
470 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
471 * decimal for v4 and colon separated network-order 16 bit hex for v6)
472 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
473 * currently the same
474 *
475 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
476 * function pointers are really function descriptors, which contain a
477 * pointer to the real address.
478 */
479static char *pointer(const char *fmt, char *buf, void *ptr, int field_width, int precision, int flags)
480{
481 if (!ptr)
482 return string(buf, "(null)", field_width, precision, flags);
483
484#ifdef CONFIG_CMD_NET
485 switch (*fmt) {
486 case 'm':
487 flags |= SPECIAL;
488 /* Fallthrough */
489 case 'M':
490 return mac_address_string(buf, ptr, field_width, precision, flags);
491 case 'i':
492 flags |= SPECIAL;
493 /* Fallthrough */
494 case 'I':
495 if (fmt[1] == '6')
496 return ip6_addr_string(buf, ptr, field_width, precision, flags);
497 if (fmt[1] == '4')
498 return ip4_addr_string(buf, ptr, field_width, precision, flags);
499 flags &= ~SPECIAL;
500 break;
501 }
502#endif
503 flags |= SMALL;
504 if (field_width == -1) {
505 field_width = 2*sizeof(void *);
506 flags |= ZEROPAD;
507 }
508 return number(buf, (unsigned long) ptr, 16, field_width, precision, flags);
509}
510
511/**
512 * vsprintf - Format a string and place it in a buffer
513 * @buf: The buffer to place the result into
514 * @fmt: The format string to use
515 * @args: Arguments for the format string
516 *
517 * This function follows C99 vsprintf, but has some extensions:
518 * %pS output the name of a text symbol
519 * %pF output the name of a function pointer
520 * %pR output the address range in a struct resource
521 *
522 * The function returns the number of characters written
523 * into @buf.
524 *
525 * Call this function if you are already dealing with a va_list.
526 * You probably want sprintf() instead.
527 */
wdenk153d5112002-08-30 11:07:04 +0000528int vsprintf(char *buf, const char *fmt, va_list args)
529{
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500530 unsigned NUM_TYPE num;
531 int base;
532 char *str;
wdenk153d5112002-08-30 11:07:04 +0000533
534 int flags; /* flags to number() */
535
536 int field_width; /* width of output field */
537 int precision; /* min. # of digits for integers; max
538 number of chars for from string */
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500539 int qualifier; /* 'h', 'l', or 'L' for integer fields */
540 /* 'z' support added 23/7/1999 S.H. */
541 /* 'z' changed to 'Z' --davidm 1/25/99 */
542 /* 't' added for ptrdiff_t */
wdenk153d5112002-08-30 11:07:04 +0000543
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500544 str = buf;
545
546 for (; *fmt ; ++fmt) {
wdenk153d5112002-08-30 11:07:04 +0000547 if (*fmt != '%') {
548 *str++ = *fmt;
549 continue;
550 }
551
552 /* process flags */
553 flags = 0;
554 repeat:
555 ++fmt; /* this also skips first '%' */
556 switch (*fmt) {
557 case '-': flags |= LEFT; goto repeat;
558 case '+': flags |= PLUS; goto repeat;
559 case ' ': flags |= SPACE; goto repeat;
560 case '#': flags |= SPECIAL; goto repeat;
561 case '0': flags |= ZEROPAD; goto repeat;
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500562 }
wdenk153d5112002-08-30 11:07:04 +0000563
564 /* get field width */
565 field_width = -1;
566 if (is_digit(*fmt))
567 field_width = skip_atoi(&fmt);
568 else if (*fmt == '*') {
569 ++fmt;
570 /* it's the next argument */
571 field_width = va_arg(args, int);
572 if (field_width < 0) {
573 field_width = -field_width;
574 flags |= LEFT;
575 }
576 }
577
578 /* get the precision */
579 precision = -1;
580 if (*fmt == '.') {
581 ++fmt;
582 if (is_digit(*fmt))
583 precision = skip_atoi(&fmt);
584 else if (*fmt == '*') {
585 ++fmt;
586 /* it's the next argument */
587 precision = va_arg(args, int);
588 }
589 if (precision < 0)
590 precision = 0;
591 }
592
593 /* get the conversion qualifier */
594 qualifier = -1;
Jean-Christophe PLAGNIOL-VILLARDf354b732008-07-14 14:11:45 +0200595 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500596 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
wdenk153d5112002-08-30 11:07:04 +0000597 qualifier = *fmt;
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500598 ++fmt;
599 if (qualifier == 'l' && *fmt == 'l') {
600 qualifier = 'L';
James Yangbf052932008-01-10 16:02:07 -0600601 ++fmt;
602 }
wdenk153d5112002-08-30 11:07:04 +0000603 }
604
605 /* default base */
606 base = 10;
607
608 switch (*fmt) {
609 case 'c':
610 if (!(flags & LEFT))
611 while (--field_width > 0)
612 *str++ = ' ';
613 *str++ = (unsigned char) va_arg(args, int);
614 while (--field_width > 0)
615 *str++ = ' ';
616 continue;
617
618 case 's':
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500619 str = string(str, va_arg(args, char *), field_width, precision, flags);
wdenk153d5112002-08-30 11:07:04 +0000620 continue;
621
622 case 'p':
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500623 str = pointer(fmt+1, str,
624 va_arg(args, void *),
625 field_width, precision, flags);
626 /* Skip all alphanumeric pointer suffixes */
627 while (isalnum(fmt[1]))
628 fmt++;
wdenk153d5112002-08-30 11:07:04 +0000629 continue;
630
wdenk153d5112002-08-30 11:07:04 +0000631 case 'n':
632 if (qualifier == 'l') {
633 long * ip = va_arg(args, long *);
634 *ip = (str - buf);
635 } else {
636 int * ip = va_arg(args, int *);
637 *ip = (str - buf);
638 }
639 continue;
640
641 case '%':
642 *str++ = '%';
643 continue;
644
645 /* integer number formats - set up the flags and "break" */
646 case 'o':
647 base = 8;
648 break;
649
wdenk153d5112002-08-30 11:07:04 +0000650 case 'x':
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500651 flags |= SMALL;
652 case 'X':
wdenk153d5112002-08-30 11:07:04 +0000653 base = 16;
654 break;
655
656 case 'd':
657 case 'i':
658 flags |= SIGN;
659 case 'u':
660 break;
661
662 default:
663 *str++ = '%';
664 if (*fmt)
665 *str++ = *fmt;
666 else
667 --fmt;
668 continue;
669 }
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500670 if (qualifier == 'L') /* "quad" for 64 bit variables */
wdenkc40b2952004-03-13 23:29:43 +0000671 num = va_arg(args, unsigned long long);
Heiko Schocher4b142fe2009-12-03 11:21:21 +0100672 else if (qualifier == 'l') {
wdenk153d5112002-08-30 11:07:04 +0000673 num = va_arg(args, unsigned long);
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500674 if (flags & SIGN)
675 num = (signed long) num;
Jean-Christophe PLAGNIOL-VILLARDf354b732008-07-14 14:11:45 +0200676 } else if (qualifier == 'Z' || qualifier == 'z') {
677 num = va_arg(args, size_t);
678 } else if (qualifier == 't') {
679 num = va_arg(args, ptrdiff_t);
680 } else if (qualifier == 'h') {
wdenk153d5112002-08-30 11:07:04 +0000681 num = (unsigned short) va_arg(args, int);
682 if (flags & SIGN)
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500683 num = (signed short) num;
684 } else {
wdenk153d5112002-08-30 11:07:04 +0000685 num = va_arg(args, unsigned int);
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500686 if (flags & SIGN)
687 num = (signed int) num;
688 }
wdenk153d5112002-08-30 11:07:04 +0000689 str = number(str, num, base, field_width, precision, flags);
690 }
691 *str = '\0';
692 return str-buf;
693}
694
Mike Frysinger6c6166f2009-02-16 23:21:36 -0500695/**
696 * sprintf - Format a string and place it in a buffer
697 * @buf: The buffer to place the result into
698 * @fmt: The format string to use
699 * @...: Arguments for the format string
700 *
701 * The function returns the number of characters written
702 * into @buf.
703 *
704 * See the vsprintf() documentation for format string extensions over C99.
705 */
wdenk153d5112002-08-30 11:07:04 +0000706int sprintf(char * buf, const char *fmt, ...)
707{
708 va_list args;
709 int i;
710
711 va_start(args, fmt);
712 i=vsprintf(buf,fmt,args);
713 va_end(args);
714 return i;
715}
716
717void panic(const char *fmt, ...)
718{
719 va_list args;
720 va_start(args, fmt);
wdenk6dd652f2003-06-19 23:40:20 +0000721 vprintf(fmt, args);
wdenk153d5112002-08-30 11:07:04 +0000722 putc('\n');
723 va_end(args);
724#if defined (CONFIG_PANIC_HANG)
725 hang();
726#else
727 udelay (100000); /* allow messages to go out */
728 do_reset (NULL, 0, 0, NULL);
729#endif
730}