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Commit | Line | Data |
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153d511e WD |
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 :-) | |
3cce8a54 SG |
10 | * |
11 | * from hush: simple_itoa() was lifted from boa-0.93.15 | |
153d511e WD |
12 | */ |
13 | ||
14 | #include <stdarg.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/ctype.h> | |
a7fd0d9f | 18 | #include <errno.h> |
153d511e WD |
19 | |
20 | #include <common.h> | |
8acdae68 | 21 | #if !defined(CONFIG_PANIC_HANG) |
153d511e | 22 | #include <command.h> |
153d511e WD |
23 | #endif |
24 | ||
47910506 | 25 | #include <div64.h> |
47910506 DB |
26 | #define noinline __attribute__((noinline)) |
27 | ||
046a37bd SR |
28 | /* some reluctance to put this into a new limits.h, so it is here */ |
29 | #define INT_MAX ((int)(~0U>>1)) | |
30 | ||
0eb25768 | 31 | static const char hex_asc[] = "0123456789abcdef"; |
6c6166f5 MF |
32 | #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] |
33 | #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] | |
34 | ||
35 | static inline char *pack_hex_byte(char *buf, u8 byte) | |
36 | { | |
37 | *buf++ = hex_asc_hi(byte); | |
38 | *buf++ = hex_asc_lo(byte); | |
39 | return buf; | |
40 | } | |
41 | ||
8acdae68 DS |
42 | unsigned long simple_strtoul(const char *cp, char **endp, |
43 | unsigned int base) | |
153d511e | 44 | { |
8acdae68 DS |
45 | unsigned long result = 0; |
46 | unsigned long value; | |
153d511e WD |
47 | |
48 | if (*cp == '0') { | |
49 | cp++; | |
50 | if ((*cp == 'x') && isxdigit(cp[1])) { | |
51 | base = 16; | |
52 | cp++; | |
53 | } | |
8acdae68 DS |
54 | |
55 | if (!base) | |
153d511e | 56 | base = 8; |
153d511e | 57 | } |
8acdae68 DS |
58 | |
59 | if (!base) | |
153d511e | 60 | base = 10; |
8acdae68 | 61 | |
153d511e WD |
62 | while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp) |
63 | ? toupper(*cp) : *cp)-'A'+10) < base) { | |
64 | result = result*base + value; | |
65 | cp++; | |
66 | } | |
8acdae68 | 67 | |
153d511e WD |
68 | if (endp) |
69 | *endp = (char *)cp; | |
8acdae68 | 70 | |
153d511e WD |
71 | return result; |
72 | } | |
73 | ||
a7fd0d9f HS |
74 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
75 | { | |
76 | char *tail; | |
77 | unsigned long val; | |
78 | size_t len; | |
79 | ||
80 | *res = 0; | |
81 | len = strlen(cp); | |
82 | if (len == 0) | |
83 | return -EINVAL; | |
84 | ||
85 | val = simple_strtoul(cp, &tail, base); | |
86 | if (tail == cp) | |
87 | return -EINVAL; | |
88 | ||
89 | if ((*tail == '\0') || | |
90 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { | |
91 | *res = val; | |
92 | return 0; | |
93 | } | |
94 | ||
95 | return -EINVAL; | |
96 | } | |
97 | ||
8acdae68 | 98 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
153d511e | 99 | { |
8acdae68 DS |
100 | if (*cp == '-') |
101 | return -simple_strtoul(cp + 1, endp, base); | |
102 | ||
103 | return simple_strtoul(cp, endp, base); | |
153d511e WD |
104 | } |
105 | ||
3ec44111 | 106 | unsigned long ustrtoul(const char *cp, char **endp, unsigned int base) |
7e6ee7ad KP |
107 | { |
108 | unsigned long result = simple_strtoul(cp, endp, base); | |
109 | switch (**endp) { | |
8acdae68 | 110 | case 'G': |
7e6ee7ad KP |
111 | result *= 1024; |
112 | /* fall through */ | |
113 | case 'M': | |
114 | result *= 1024; | |
115 | /* fall through */ | |
116 | case 'K': | |
117 | case 'k': | |
118 | result *= 1024; | |
119 | if ((*endp)[1] == 'i') { | |
120 | if ((*endp)[2] == 'B') | |
121 | (*endp) += 3; | |
122 | else | |
123 | (*endp) += 2; | |
124 | } | |
125 | } | |
126 | return result; | |
127 | } | |
128 | ||
8acdae68 DS |
129 | unsigned long long simple_strtoull(const char *cp, char **endp, |
130 | unsigned int base) | |
c40b2956 WD |
131 | { |
132 | unsigned long long result = 0, value; | |
133 | ||
134 | if (*cp == '0') { | |
135 | cp++; | |
8acdae68 | 136 | if ((*cp == 'x') && isxdigit(cp[1])) { |
c40b2956 WD |
137 | base = 16; |
138 | cp++; | |
139 | } | |
8acdae68 DS |
140 | |
141 | if (!base) | |
c40b2956 | 142 | base = 8; |
c40b2956 | 143 | } |
8acdae68 DS |
144 | |
145 | if (!base) | |
c40b2956 | 146 | base = 10; |
8acdae68 DS |
147 | |
148 | while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp - '0' | |
149 | : (islower(*cp) ? toupper(*cp) : *cp) - 'A' + 10) < base) { | |
c40b2956 WD |
150 | result = result * base + value; |
151 | cp++; | |
152 | } | |
8acdae68 | 153 | |
c40b2956 WD |
154 | if (endp) |
155 | *endp = (char *) cp; | |
8acdae68 | 156 | |
c40b2956 WD |
157 | return result; |
158 | } | |
c40b2956 | 159 | |
153d511e WD |
160 | /* we use this so that we can do without the ctype library */ |
161 | #define is_digit(c) ((c) >= '0' && (c) <= '9') | |
162 | ||
163 | static int skip_atoi(const char **s) | |
164 | { | |
8acdae68 | 165 | int i = 0; |
153d511e WD |
166 | |
167 | while (is_digit(**s)) | |
8acdae68 DS |
168 | i = i * 10 + *((*s)++) - '0'; |
169 | ||
153d511e WD |
170 | return i; |
171 | } | |
172 | ||
6c6166f5 MF |
173 | /* Decimal conversion is by far the most typical, and is used |
174 | * for /proc and /sys data. This directly impacts e.g. top performance | |
175 | * with many processes running. We optimize it for speed | |
176 | * using code from | |
177 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html | |
178 | * (with permission from the author, Douglas W. Jones). */ | |
179 | ||
180 | /* Formats correctly any integer in [0,99999]. | |
181 | * Outputs from one to five digits depending on input. | |
182 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ | |
8acdae68 | 183 | static char *put_dec_trunc(char *buf, unsigned q) |
6c6166f5 MF |
184 | { |
185 | unsigned d3, d2, d1, d0; | |
186 | d1 = (q>>4) & 0xf; | |
187 | d2 = (q>>8) & 0xf; | |
188 | d3 = (q>>12); | |
189 | ||
190 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
191 | q = (d0 * 0xcd) >> 11; | |
192 | d0 = d0 - 10*q; | |
193 | *buf++ = d0 + '0'; /* least significant digit */ | |
194 | d1 = q + 9*d3 + 5*d2 + d1; | |
195 | if (d1 != 0) { | |
196 | q = (d1 * 0xcd) >> 11; | |
197 | d1 = d1 - 10*q; | |
198 | *buf++ = d1 + '0'; /* next digit */ | |
199 | ||
200 | d2 = q + 2*d2; | |
201 | if ((d2 != 0) || (d3 != 0)) { | |
202 | q = (d2 * 0xd) >> 7; | |
203 | d2 = d2 - 10*q; | |
204 | *buf++ = d2 + '0'; /* next digit */ | |
205 | ||
206 | d3 = q + 4*d3; | |
207 | if (d3 != 0) { | |
208 | q = (d3 * 0xcd) >> 11; | |
209 | d3 = d3 - 10*q; | |
210 | *buf++ = d3 + '0'; /* next digit */ | |
211 | if (q != 0) | |
8acdae68 | 212 | *buf++ = q + '0'; /* most sign. digit */ |
6c6166f5 MF |
213 | } |
214 | } | |
215 | } | |
216 | return buf; | |
217 | } | |
218 | /* Same with if's removed. Always emits five digits */ | |
8acdae68 | 219 | static char *put_dec_full(char *buf, unsigned q) |
6c6166f5 MF |
220 | { |
221 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ | |
222 | /* but anyway, gcc produces better code with full-sized ints */ | |
223 | unsigned d3, d2, d1, d0; | |
224 | d1 = (q>>4) & 0xf; | |
225 | d2 = (q>>8) & 0xf; | |
226 | d3 = (q>>12); | |
227 | ||
c0a14aed WD |
228 | /* |
229 | * Possible ways to approx. divide by 10 | |
230 | * gcc -O2 replaces multiply with shifts and adds | |
231 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) | |
232 | * (x * 0x67) >> 10: 1100111 | |
233 | * (x * 0x34) >> 9: 110100 - same | |
234 | * (x * 0x1a) >> 8: 11010 - same | |
235 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) | |
236 | */ | |
6c6166f5 MF |
237 | |
238 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); | |
239 | q = (d0 * 0xcd) >> 11; | |
240 | d0 = d0 - 10*q; | |
241 | *buf++ = d0 + '0'; | |
242 | d1 = q + 9*d3 + 5*d2 + d1; | |
243 | q = (d1 * 0xcd) >> 11; | |
244 | d1 = d1 - 10*q; | |
245 | *buf++ = d1 + '0'; | |
246 | ||
247 | d2 = q + 2*d2; | |
248 | q = (d2 * 0xd) >> 7; | |
249 | d2 = d2 - 10*q; | |
250 | *buf++ = d2 + '0'; | |
251 | ||
252 | d3 = q + 4*d3; | |
253 | q = (d3 * 0xcd) >> 11; /* - shorter code */ | |
254 | /* q = (d3 * 0x67) >> 10; - would also work */ | |
255 | d3 = d3 - 10*q; | |
256 | *buf++ = d3 + '0'; | |
257 | *buf++ = q + '0'; | |
258 | return buf; | |
259 | } | |
260 | /* No inlining helps gcc to use registers better */ | |
7b64f66c | 261 | static noinline char *put_dec(char *buf, u64 num) |
6c6166f5 MF |
262 | { |
263 | while (1) { | |
264 | unsigned rem; | |
265 | if (num < 100000) | |
266 | return put_dec_trunc(buf, num); | |
267 | rem = do_div(num, 100000); | |
268 | buf = put_dec_full(buf, rem); | |
269 | } | |
270 | } | |
271 | ||
153d511e WD |
272 | #define ZEROPAD 1 /* pad with zero */ |
273 | #define SIGN 2 /* unsigned/signed long */ | |
274 | #define PLUS 4 /* show plus */ | |
275 | #define SPACE 8 /* space if plus */ | |
276 | #define LEFT 16 /* left justified */ | |
6c6166f5 MF |
277 | #define SMALL 32 /* Must be 32 == 0x20 */ |
278 | #define SPECIAL 64 /* 0x */ | |
153d511e | 279 | |
046a37bd SR |
280 | #ifdef CONFIG_SYS_VSNPRINTF |
281 | /* | |
282 | * Macro to add a new character to our output string, but only if it will | |
283 | * fit. The macro moves to the next character position in the output string. | |
284 | */ | |
285 | #define ADDCH(str, ch) do { \ | |
286 | if ((str) < end) \ | |
287 | *(str) = (ch); \ | |
288 | ++str; \ | |
289 | } while (0) | |
290 | #else | |
291 | #define ADDCH(str, ch) (*(str)++ = (ch)) | |
292 | #endif | |
293 | ||
7b64f66c | 294 | static char *number(char *buf, char *end, u64 num, |
046a37bd | 295 | int base, int size, int precision, int type) |
153d511e | 296 | { |
6c6166f5 | 297 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
8acdae68 | 298 | static const char digits[16] = "0123456789ABCDEF"; |
6c6166f5 MF |
299 | |
300 | char tmp[66]; | |
301 | char sign; | |
302 | char locase; | |
303 | int need_pfx = ((type & SPECIAL) && base != 10); | |
153d511e WD |
304 | int i; |
305 | ||
6c6166f5 MF |
306 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
307 | * produces same digits or (maybe lowercased) letters */ | |
308 | locase = (type & SMALL); | |
153d511e WD |
309 | if (type & LEFT) |
310 | type &= ~ZEROPAD; | |
153d511e WD |
311 | sign = 0; |
312 | if (type & SIGN) { | |
7b64f66c | 313 | if ((s64) num < 0) { |
153d511e | 314 | sign = '-'; |
7b64f66c | 315 | num = -(s64) num; |
153d511e WD |
316 | size--; |
317 | } else if (type & PLUS) { | |
318 | sign = '+'; | |
319 | size--; | |
320 | } else if (type & SPACE) { | |
321 | sign = ' '; | |
322 | size--; | |
323 | } | |
324 | } | |
6c6166f5 MF |
325 | if (need_pfx) { |
326 | size--; | |
153d511e | 327 | if (base == 16) |
153d511e WD |
328 | size--; |
329 | } | |
6c6166f5 MF |
330 | |
331 | /* generate full string in tmp[], in reverse order */ | |
153d511e WD |
332 | i = 0; |
333 | if (num == 0) | |
6c6166f5 MF |
334 | tmp[i++] = '0'; |
335 | /* Generic code, for any base: | |
336 | else do { | |
337 | tmp[i++] = (digits[do_div(num,base)] | locase); | |
338 | } while (num != 0); | |
339 | */ | |
340 | else if (base != 10) { /* 8 or 16 */ | |
341 | int mask = base - 1; | |
342 | int shift = 3; | |
8acdae68 DS |
343 | |
344 | if (base == 16) | |
345 | shift = 4; | |
346 | ||
6c6166f5 | 347 | do { |
8acdae68 DS |
348 | tmp[i++] = (digits[((unsigned char)num) & mask] |
349 | | locase); | |
6c6166f5 MF |
350 | num >>= shift; |
351 | } while (num); | |
352 | } else { /* base 10 */ | |
353 | i = put_dec(tmp, num) - tmp; | |
354 | } | |
355 | ||
356 | /* printing 100 using %2d gives "100", not "00" */ | |
153d511e WD |
357 | if (i > precision) |
358 | precision = i; | |
6c6166f5 | 359 | /* leading space padding */ |
153d511e | 360 | size -= precision; |
046a37bd SR |
361 | if (!(type & (ZEROPAD + LEFT))) { |
362 | while (--size >= 0) | |
363 | ADDCH(buf, ' '); | |
364 | } | |
6c6166f5 | 365 | /* sign */ |
153d511e | 366 | if (sign) |
046a37bd | 367 | ADDCH(buf, sign); |
6c6166f5 MF |
368 | /* "0x" / "0" prefix */ |
369 | if (need_pfx) { | |
046a37bd | 370 | ADDCH(buf, '0'); |
6c6166f5 | 371 | if (base == 16) |
046a37bd | 372 | ADDCH(buf, 'X' | locase); |
6c6166f5 MF |
373 | } |
374 | /* zero or space padding */ | |
375 | if (!(type & LEFT)) { | |
376 | char c = (type & ZEROPAD) ? '0' : ' '; | |
046a37bd | 377 | |
6c6166f5 | 378 | while (--size >= 0) |
046a37bd | 379 | ADDCH(buf, c); |
153d511e | 380 | } |
6c6166f5 MF |
381 | /* hmm even more zero padding? */ |
382 | while (i <= --precision) | |
046a37bd | 383 | ADDCH(buf, '0'); |
6c6166f5 MF |
384 | /* actual digits of result */ |
385 | while (--i >= 0) | |
046a37bd | 386 | ADDCH(buf, tmp[i]); |
6c6166f5 MF |
387 | /* trailing space padding */ |
388 | while (--size >= 0) | |
046a37bd | 389 | ADDCH(buf, ' '); |
6c6166f5 | 390 | return buf; |
153d511e WD |
391 | } |
392 | ||
046a37bd SR |
393 | static char *string(char *buf, char *end, char *s, int field_width, |
394 | int precision, int flags) | |
6c6166f5 MF |
395 | { |
396 | int len, i; | |
153d511e | 397 | |
0eb25768 | 398 | if (s == NULL) |
6c6166f5 MF |
399 | s = "<NULL>"; |
400 | ||
401 | len = strnlen(s, precision); | |
402 | ||
403 | if (!(flags & LEFT)) | |
404 | while (len < field_width--) | |
046a37bd | 405 | ADDCH(buf, ' '); |
6c6166f5 | 406 | for (i = 0; i < len; ++i) |
046a37bd | 407 | ADDCH(buf, *s++); |
6c6166f5 | 408 | while (len < field_width--) |
046a37bd | 409 | ADDCH(buf, ' '); |
6c6166f5 MF |
410 | return buf; |
411 | } | |
412 | ||
413 | #ifdef CONFIG_CMD_NET | |
046a37bd | 414 | static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 | 415 | int precision, int flags) |
153d511e | 416 | { |
8acdae68 DS |
417 | /* (6 * 2 hex digits), 5 colons and trailing zero */ |
418 | char mac_addr[6 * 3]; | |
6c6166f5 MF |
419 | char *p = mac_addr; |
420 | int i; | |
421 | ||
422 | for (i = 0; i < 6; i++) { | |
423 | p = pack_hex_byte(p, addr[i]); | |
424 | if (!(flags & SPECIAL) && i != 5) | |
425 | *p++ = ':'; | |
426 | } | |
427 | *p = '\0'; | |
428 | ||
046a37bd SR |
429 | return string(buf, end, mac_addr, field_width, precision, |
430 | flags & ~SPECIAL); | |
6c6166f5 MF |
431 | } |
432 | ||
046a37bd | 433 | static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
434 | int precision, int flags) |
435 | { | |
8acdae68 DS |
436 | /* (8 * 4 hex digits), 7 colons and trailing zero */ |
437 | char ip6_addr[8 * 5]; | |
6c6166f5 MF |
438 | char *p = ip6_addr; |
439 | int i; | |
440 | ||
441 | for (i = 0; i < 8; i++) { | |
442 | p = pack_hex_byte(p, addr[2 * i]); | |
443 | p = pack_hex_byte(p, addr[2 * i + 1]); | |
444 | if (!(flags & SPECIAL) && i != 7) | |
445 | *p++ = ':'; | |
446 | } | |
447 | *p = '\0'; | |
448 | ||
046a37bd SR |
449 | return string(buf, end, ip6_addr, field_width, precision, |
450 | flags & ~SPECIAL); | |
6c6166f5 MF |
451 | } |
452 | ||
046a37bd | 453 | static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
454 | int precision, int flags) |
455 | { | |
8acdae68 DS |
456 | /* (4 * 3 decimal digits), 3 dots and trailing zero */ |
457 | char ip4_addr[4 * 4]; | |
6c6166f5 MF |
458 | char temp[3]; /* hold each IP quad in reverse order */ |
459 | char *p = ip4_addr; | |
460 | int i, digits; | |
461 | ||
462 | for (i = 0; i < 4; i++) { | |
463 | digits = put_dec_trunc(temp, addr[i]) - temp; | |
464 | /* reverse the digits in the quad */ | |
465 | while (digits--) | |
466 | *p++ = temp[digits]; | |
467 | if (i != 3) | |
468 | *p++ = '.'; | |
469 | } | |
470 | *p = '\0'; | |
471 | ||
046a37bd SR |
472 | return string(buf, end, ip4_addr, field_width, precision, |
473 | flags & ~SPECIAL); | |
6c6166f5 | 474 | } |
c40b2956 | 475 | #endif |
6c6166f5 MF |
476 | |
477 | /* | |
478 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
479 | * by an extra set of alphanumeric characters that are extended format | |
480 | * specifiers. | |
481 | * | |
482 | * Right now we handle: | |
483 | * | |
484 | * - 'M' For a 6-byte MAC address, it prints the address in the | |
485 | * usual colon-separated hex notation | |
486 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated | |
487 | * decimal for v4 and colon separated network-order 16 bit hex for v6) | |
488 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is | |
489 | * currently the same | |
490 | * | |
491 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 | |
492 | * function pointers are really function descriptors, which contain a | |
493 | * pointer to the real address. | |
494 | */ | |
046a37bd SR |
495 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
496 | int field_width, int precision, int flags) | |
6c6166f5 | 497 | { |
d266f669 WD |
498 | /* |
499 | * Being a boot loader, we explicitly allow pointers to | |
500 | * (physical) address null. | |
501 | */ | |
502 | #if 0 | |
6c6166f5 | 503 | if (!ptr) |
046a37bd SR |
504 | return string(buf, end, "(null)", field_width, precision, |
505 | flags); | |
d266f669 | 506 | #endif |
6c6166f5 MF |
507 | |
508 | #ifdef CONFIG_CMD_NET | |
509 | switch (*fmt) { | |
510 | case 'm': | |
511 | flags |= SPECIAL; | |
512 | /* Fallthrough */ | |
513 | case 'M': | |
046a37bd SR |
514 | return mac_address_string(buf, end, ptr, field_width, |
515 | precision, flags); | |
6c6166f5 MF |
516 | case 'i': |
517 | flags |= SPECIAL; | |
518 | /* Fallthrough */ | |
519 | case 'I': | |
520 | if (fmt[1] == '6') | |
046a37bd SR |
521 | return ip6_addr_string(buf, end, ptr, field_width, |
522 | precision, flags); | |
6c6166f5 | 523 | if (fmt[1] == '4') |
046a37bd SR |
524 | return ip4_addr_string(buf, end, ptr, field_width, |
525 | precision, flags); | |
6c6166f5 MF |
526 | flags &= ~SPECIAL; |
527 | break; | |
528 | } | |
529 | #endif | |
530 | flags |= SMALL; | |
531 | if (field_width == -1) { | |
532 | field_width = 2*sizeof(void *); | |
533 | flags |= ZEROPAD; | |
534 | } | |
046a37bd SR |
535 | return number(buf, end, (unsigned long)ptr, 16, field_width, |
536 | precision, flags); | |
6c6166f5 MF |
537 | } |
538 | ||
046a37bd SR |
539 | static int vsnprintf_internal(char *buf, size_t size, const char *fmt, |
540 | va_list args) | |
6c6166f5 | 541 | { |
7b64f66c | 542 | u64 num; |
6c6166f5 MF |
543 | int base; |
544 | char *str; | |
153d511e WD |
545 | |
546 | int flags; /* flags to number() */ | |
547 | ||
548 | int field_width; /* width of output field */ | |
549 | int precision; /* min. # of digits for integers; max | |
550 | number of chars for from string */ | |
6c6166f5 MF |
551 | int qualifier; /* 'h', 'l', or 'L' for integer fields */ |
552 | /* 'z' support added 23/7/1999 S.H. */ | |
553 | /* 'z' changed to 'Z' --davidm 1/25/99 */ | |
554 | /* 't' added for ptrdiff_t */ | |
046a37bd | 555 | char *end = buf + size; |
6c6166f5 | 556 | |
046a37bd SR |
557 | #ifdef CONFIG_SYS_VSNPRINTF |
558 | /* Make sure end is always >= buf - do we want this in U-Boot? */ | |
559 | if (end < buf) { | |
560 | end = ((void *)-1); | |
561 | size = end - buf; | |
562 | } | |
563 | #endif | |
6c6166f5 | 564 | str = buf; |
153d511e | 565 | |
6c6166f5 | 566 | for (; *fmt ; ++fmt) { |
153d511e | 567 | if (*fmt != '%') { |
046a37bd | 568 | ADDCH(str, *fmt); |
153d511e WD |
569 | continue; |
570 | } | |
571 | ||
572 | /* process flags */ | |
573 | flags = 0; | |
8acdae68 | 574 | repeat: |
153d511e WD |
575 | ++fmt; /* this also skips first '%' */ |
576 | switch (*fmt) { | |
8acdae68 DS |
577 | case '-': |
578 | flags |= LEFT; | |
579 | goto repeat; | |
580 | case '+': | |
581 | flags |= PLUS; | |
582 | goto repeat; | |
583 | case ' ': | |
584 | flags |= SPACE; | |
585 | goto repeat; | |
586 | case '#': | |
587 | flags |= SPECIAL; | |
588 | goto repeat; | |
589 | case '0': | |
590 | flags |= ZEROPAD; | |
591 | goto repeat; | |
6c6166f5 | 592 | } |
153d511e WD |
593 | |
594 | /* get field width */ | |
595 | field_width = -1; | |
596 | if (is_digit(*fmt)) | |
597 | field_width = skip_atoi(&fmt); | |
598 | else if (*fmt == '*') { | |
599 | ++fmt; | |
600 | /* it's the next argument */ | |
601 | field_width = va_arg(args, int); | |
602 | if (field_width < 0) { | |
603 | field_width = -field_width; | |
604 | flags |= LEFT; | |
605 | } | |
606 | } | |
607 | ||
608 | /* get the precision */ | |
609 | precision = -1; | |
610 | if (*fmt == '.') { | |
611 | ++fmt; | |
612 | if (is_digit(*fmt)) | |
613 | precision = skip_atoi(&fmt); | |
614 | else if (*fmt == '*') { | |
615 | ++fmt; | |
616 | /* it's the next argument */ | |
617 | precision = va_arg(args, int); | |
618 | } | |
619 | if (precision < 0) | |
620 | precision = 0; | |
621 | } | |
622 | ||
623 | /* get the conversion qualifier */ | |
624 | qualifier = -1; | |
f354b73e | 625 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || |
6c6166f5 | 626 | *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { |
153d511e | 627 | qualifier = *fmt; |
6c6166f5 MF |
628 | ++fmt; |
629 | if (qualifier == 'l' && *fmt == 'l') { | |
630 | qualifier = 'L'; | |
bf052939 JY |
631 | ++fmt; |
632 | } | |
153d511e WD |
633 | } |
634 | ||
635 | /* default base */ | |
636 | base = 10; | |
637 | ||
638 | switch (*fmt) { | |
639 | case 'c': | |
046a37bd | 640 | if (!(flags & LEFT)) { |
153d511e | 641 | while (--field_width > 0) |
046a37bd SR |
642 | ADDCH(str, ' '); |
643 | } | |
644 | ADDCH(str, (unsigned char) va_arg(args, int)); | |
153d511e | 645 | while (--field_width > 0) |
046a37bd | 646 | ADDCH(str, ' '); |
153d511e WD |
647 | continue; |
648 | ||
649 | case 's': | |
046a37bd SR |
650 | str = string(str, end, va_arg(args, char *), |
651 | field_width, precision, flags); | |
153d511e WD |
652 | continue; |
653 | ||
654 | case 'p': | |
8acdae68 | 655 | str = pointer(fmt + 1, str, end, |
6c6166f5 MF |
656 | va_arg(args, void *), |
657 | field_width, precision, flags); | |
658 | /* Skip all alphanumeric pointer suffixes */ | |
659 | while (isalnum(fmt[1])) | |
660 | fmt++; | |
153d511e WD |
661 | continue; |
662 | ||
153d511e WD |
663 | case 'n': |
664 | if (qualifier == 'l') { | |
8acdae68 | 665 | long *ip = va_arg(args, long *); |
153d511e WD |
666 | *ip = (str - buf); |
667 | } else { | |
8acdae68 | 668 | int *ip = va_arg(args, int *); |
153d511e WD |
669 | *ip = (str - buf); |
670 | } | |
671 | continue; | |
672 | ||
673 | case '%': | |
046a37bd | 674 | ADDCH(str, '%'); |
153d511e WD |
675 | continue; |
676 | ||
677 | /* integer number formats - set up the flags and "break" */ | |
678 | case 'o': | |
679 | base = 8; | |
680 | break; | |
681 | ||
153d511e | 682 | case 'x': |
6c6166f5 MF |
683 | flags |= SMALL; |
684 | case 'X': | |
153d511e WD |
685 | base = 16; |
686 | break; | |
687 | ||
688 | case 'd': | |
689 | case 'i': | |
690 | flags |= SIGN; | |
691 | case 'u': | |
692 | break; | |
693 | ||
694 | default: | |
046a37bd | 695 | ADDCH(str, '%'); |
153d511e | 696 | if (*fmt) |
046a37bd | 697 | ADDCH(str, *fmt); |
153d511e WD |
698 | else |
699 | --fmt; | |
700 | continue; | |
701 | } | |
6c6166f5 | 702 | if (qualifier == 'L') /* "quad" for 64 bit variables */ |
c40b2956 | 703 | num = va_arg(args, unsigned long long); |
4b142feb | 704 | else if (qualifier == 'l') { |
153d511e | 705 | num = va_arg(args, unsigned long); |
6c6166f5 MF |
706 | if (flags & SIGN) |
707 | num = (signed long) num; | |
f354b73e JCPV |
708 | } else if (qualifier == 'Z' || qualifier == 'z') { |
709 | num = va_arg(args, size_t); | |
710 | } else if (qualifier == 't') { | |
711 | num = va_arg(args, ptrdiff_t); | |
712 | } else if (qualifier == 'h') { | |
153d511e WD |
713 | num = (unsigned short) va_arg(args, int); |
714 | if (flags & SIGN) | |
6c6166f5 MF |
715 | num = (signed short) num; |
716 | } else { | |
153d511e | 717 | num = va_arg(args, unsigned int); |
6c6166f5 MF |
718 | if (flags & SIGN) |
719 | num = (signed int) num; | |
720 | } | |
046a37bd SR |
721 | str = number(str, end, num, base, field_width, precision, |
722 | flags); | |
723 | } | |
724 | ||
725 | #ifdef CONFIG_SYS_VSNPRINTF | |
726 | if (size > 0) { | |
727 | ADDCH(str, '\0'); | |
728 | if (str > end) | |
729 | end[-1] = '\0'; | |
153d511e | 730 | } |
046a37bd | 731 | #else |
153d511e | 732 | *str = '\0'; |
046a37bd SR |
733 | #endif |
734 | /* the trailing null byte doesn't count towards the total */ | |
8acdae68 | 735 | return str - buf; |
153d511e WD |
736 | } |
737 | ||
046a37bd SR |
738 | #ifdef CONFIG_SYS_VSNPRINTF |
739 | int vsnprintf(char *buf, size_t size, const char *fmt, | |
740 | va_list args) | |
741 | { | |
742 | return vsnprintf_internal(buf, size, fmt, args); | |
743 | } | |
744 | ||
046a37bd SR |
745 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
746 | { | |
747 | int i; | |
748 | ||
749 | i = vsnprintf(buf, size, fmt, args); | |
750 | ||
751 | if (likely(i < size)) | |
752 | return i; | |
753 | if (size != 0) | |
754 | return size - 1; | |
755 | return 0; | |
756 | } | |
757 | ||
046a37bd SR |
758 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
759 | { | |
760 | va_list args; | |
761 | int i; | |
762 | ||
763 | va_start(args, fmt); | |
764 | i = vsnprintf(buf, size, fmt, args); | |
765 | va_end(args); | |
766 | ||
767 | return i; | |
768 | } | |
769 | ||
046a37bd SR |
770 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
771 | { | |
772 | va_list args; | |
773 | int i; | |
774 | ||
775 | va_start(args, fmt); | |
776 | i = vscnprintf(buf, size, fmt, args); | |
777 | va_end(args); | |
778 | ||
779 | return i; | |
780 | } | |
781 | #endif /* CONFIG_SYS_VSNPRINT */ | |
782 | ||
783 | /** | |
784 | * Format a string and place it in a buffer (va_list version) | |
785 | * | |
786 | * @param buf The buffer to place the result into | |
787 | * @param fmt The format string to use | |
788 | * @param args Arguments for the format string | |
789 | * | |
790 | * The function returns the number of characters written | |
791 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid | |
792 | * buffer overflows. | |
793 | * | |
794 | * If you're not already dealing with a va_list consider using sprintf(). | |
795 | */ | |
796 | int vsprintf(char *buf, const char *fmt, va_list args) | |
797 | { | |
798 | return vsnprintf_internal(buf, INT_MAX, fmt, args); | |
799 | } | |
800 | ||
8acdae68 | 801 | int sprintf(char *buf, const char *fmt, ...) |
153d511e WD |
802 | { |
803 | va_list args; | |
804 | int i; | |
805 | ||
806 | va_start(args, fmt); | |
8acdae68 | 807 | i = vsprintf(buf, fmt, args); |
153d511e WD |
808 | va_end(args); |
809 | return i; | |
810 | } | |
811 | ||
812 | void panic(const char *fmt, ...) | |
813 | { | |
8acdae68 | 814 | va_list args; |
153d511e | 815 | va_start(args, fmt); |
6dd652fa | 816 | vprintf(fmt, args); |
153d511e WD |
817 | putc('\n'); |
818 | va_end(args); | |
8acdae68 | 819 | #if defined(CONFIG_PANIC_HANG) |
153d511e WD |
820 | hang(); |
821 | #else | |
8acdae68 DS |
822 | udelay(100000); /* allow messages to go out */ |
823 | do_reset(NULL, 0, 0, NULL); | |
153d511e | 824 | #endif |
40e01881 HS |
825 | while (1) |
826 | ; | |
153d511e | 827 | } |
21726a7a SG |
828 | |
829 | void __assert_fail(const char *assertion, const char *file, unsigned line, | |
830 | const char *function) | |
831 | { | |
832 | /* This will not return */ | |
833 | panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, | |
834 | assertion); | |
835 | } | |
3cce8a54 SG |
836 | |
837 | char *simple_itoa(ulong i) | |
838 | { | |
839 | /* 21 digits plus null terminator, good for 64-bit or smaller ints */ | |
840 | static char local[22]; | |
841 | char *p = &local[21]; | |
842 | ||
843 | *p-- = '\0'; | |
844 | do { | |
845 | *p-- = '0' + i % 10; | |
846 | i /= 10; | |
847 | } while (i > 0); | |
848 | return p + 1; | |
849 | } |