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 * from hush: simple_itoa() was lifted from boa-0.93.15
12 */
13
14 #include <common.h>
15 #include <charset.h>
16 #include <efi_loader.h>
17 #include <div64.h>
18 #include <hexdump.h>
19 #include <uuid.h>
20 #include <stdarg.h>
21 #include <linux/types.h>
22 #include <linux/string.h>
23 #include <linux/ctype.h>
24
25 #define noinline __attribute__((noinline))
26
27 /* we use this so that we can do without the ctype library */
28 #define is_digit(c) ((c) >= '0' && (c) <= '9')
29
skip_atoi(const char ** s)30 static int skip_atoi(const char **s)
31 {
32 int i = 0;
33
34 while (is_digit(**s))
35 i = i * 10 + *((*s)++) - '0';
36
37 return i;
38 }
39
40 /* Decimal conversion is by far the most typical, and is used
41 * for /proc and /sys data. This directly impacts e.g. top performance
42 * with many processes running. We optimize it for speed
43 * using code from
44 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
45 * (with permission from the author, Douglas W. Jones). */
46
47 /* Formats correctly any integer in [0,99999].
48 * Outputs from one to five digits depending on input.
49 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
put_dec_trunc(char * buf,unsigned q)50 static char *put_dec_trunc(char *buf, unsigned q)
51 {
52 unsigned d3, d2, d1, d0;
53 d1 = (q>>4) & 0xf;
54 d2 = (q>>8) & 0xf;
55 d3 = (q>>12);
56
57 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
58 q = (d0 * 0xcd) >> 11;
59 d0 = d0 - 10*q;
60 *buf++ = d0 + '0'; /* least significant digit */
61 d1 = q + 9*d3 + 5*d2 + d1;
62 if (d1 != 0) {
63 q = (d1 * 0xcd) >> 11;
64 d1 = d1 - 10*q;
65 *buf++ = d1 + '0'; /* next digit */
66
67 d2 = q + 2*d2;
68 if ((d2 != 0) || (d3 != 0)) {
69 q = (d2 * 0xd) >> 7;
70 d2 = d2 - 10*q;
71 *buf++ = d2 + '0'; /* next digit */
72
73 d3 = q + 4*d3;
74 if (d3 != 0) {
75 q = (d3 * 0xcd) >> 11;
76 d3 = d3 - 10*q;
77 *buf++ = d3 + '0'; /* next digit */
78 if (q != 0)
79 *buf++ = q + '0'; /* most sign. digit */
80 }
81 }
82 }
83 return buf;
84 }
85 /* Same with if's removed. Always emits five digits */
put_dec_full(char * buf,unsigned q)86 static char *put_dec_full(char *buf, unsigned q)
87 {
88 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
89 /* but anyway, gcc produces better code with full-sized ints */
90 unsigned d3, d2, d1, d0;
91 d1 = (q>>4) & 0xf;
92 d2 = (q>>8) & 0xf;
93 d3 = (q>>12);
94
95 /*
96 * Possible ways to approx. divide by 10
97 * gcc -O2 replaces multiply with shifts and adds
98 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
99 * (x * 0x67) >> 10: 1100111
100 * (x * 0x34) >> 9: 110100 - same
101 * (x * 0x1a) >> 8: 11010 - same
102 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
103 */
104
105 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
106 q = (d0 * 0xcd) >> 11;
107 d0 = d0 - 10*q;
108 *buf++ = d0 + '0';
109 d1 = q + 9*d3 + 5*d2 + d1;
110 q = (d1 * 0xcd) >> 11;
111 d1 = d1 - 10*q;
112 *buf++ = d1 + '0';
113
114 d2 = q + 2*d2;
115 q = (d2 * 0xd) >> 7;
116 d2 = d2 - 10*q;
117 *buf++ = d2 + '0';
118
119 d3 = q + 4*d3;
120 q = (d3 * 0xcd) >> 11; /* - shorter code */
121 /* q = (d3 * 0x67) >> 10; - would also work */
122 d3 = d3 - 10*q;
123 *buf++ = d3 + '0';
124 *buf++ = q + '0';
125 return buf;
126 }
127 /* No inlining helps gcc to use registers better */
put_dec(char * buf,uint64_t num)128 static noinline char *put_dec(char *buf, uint64_t num)
129 {
130 while (1) {
131 unsigned rem;
132 if (num < 100000)
133 return put_dec_trunc(buf, num);
134 rem = do_div(num, 100000);
135 buf = put_dec_full(buf, rem);
136 }
137 }
138
139 #define ZEROPAD 1 /* pad with zero */
140 #define SIGN 2 /* unsigned/signed long */
141 #define PLUS 4 /* show plus */
142 #define SPACE 8 /* space if plus */
143 #define LEFT 16 /* left justified */
144 #define SMALL 32 /* Must be 32 == 0x20 */
145 #define SPECIAL 64 /* 0x */
146
147 /*
148 * Macro to add a new character to our output string, but only if it will
149 * fit. The macro moves to the next character position in the output string.
150 */
151 #define ADDCH(str, ch) do { \
152 if ((str) < end) \
153 *(str) = (ch); \
154 ++str; \
155 } while (0)
156
number(char * buf,char * end,u64 num,int base,int size,int precision,int type)157 static char *number(char *buf, char *end, u64 num,
158 int base, int size, int precision, int type)
159 {
160 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
161 static const char digits[16] = "0123456789ABCDEF";
162
163 char tmp[66];
164 char sign;
165 char locase;
166 int need_pfx = ((type & SPECIAL) && base != 10);
167 int i;
168
169 /* locase = 0 or 0x20. ORing digits or letters with 'locase'
170 * produces same digits or (maybe lowercased) letters */
171 locase = (type & SMALL);
172 if (type & LEFT)
173 type &= ~ZEROPAD;
174 sign = 0;
175 if (type & SIGN) {
176 if ((s64) num < 0) {
177 sign = '-';
178 num = -(s64) num;
179 size--;
180 } else if (type & PLUS) {
181 sign = '+';
182 size--;
183 } else if (type & SPACE) {
184 sign = ' ';
185 size--;
186 }
187 }
188 if (need_pfx) {
189 size--;
190 if (base == 16)
191 size--;
192 }
193
194 /* generate full string in tmp[], in reverse order */
195 i = 0;
196 if (num == 0)
197 tmp[i++] = '0';
198 /* Generic code, for any base:
199 else do {
200 tmp[i++] = (digits[do_div(num,base)] | locase);
201 } while (num != 0);
202 */
203 else if (base != 10) { /* 8 or 16 */
204 int mask = base - 1;
205 int shift = 3;
206
207 if (base == 16)
208 shift = 4;
209
210 do {
211 tmp[i++] = (digits[((unsigned char)num) & mask]
212 | locase);
213 num >>= shift;
214 } while (num);
215 } else { /* base 10 */
216 i = put_dec(tmp, num) - tmp;
217 }
218
219 /* printing 100 using %2d gives "100", not "00" */
220 if (i > precision)
221 precision = i;
222 /* leading space padding */
223 size -= precision;
224 if (!(type & (ZEROPAD + LEFT))) {
225 while (--size >= 0)
226 ADDCH(buf, ' ');
227 }
228 /* sign */
229 if (sign)
230 ADDCH(buf, sign);
231 /* "0x" / "0" prefix */
232 if (need_pfx) {
233 ADDCH(buf, '0');
234 if (base == 16)
235 ADDCH(buf, 'X' | locase);
236 }
237 /* zero or space padding */
238 if (!(type & LEFT)) {
239 char c = (type & ZEROPAD) ? '0' : ' ';
240
241 while (--size >= 0)
242 ADDCH(buf, c);
243 }
244 /* hmm even more zero padding? */
245 while (i <= --precision)
246 ADDCH(buf, '0');
247 /* actual digits of result */
248 while (--i >= 0)
249 ADDCH(buf, tmp[i]);
250 /* trailing space padding */
251 while (--size >= 0)
252 ADDCH(buf, ' ');
253 return buf;
254 }
255
string(char * buf,char * end,char * s,int field_width,int precision,int flags)256 static char *string(char *buf, char *end, char *s, int field_width,
257 int precision, int flags)
258 {
259 int len, i;
260
261 if (s == NULL)
262 s = "<NULL>";
263
264 len = strnlen(s, precision);
265
266 if (!(flags & LEFT))
267 while (len < field_width--)
268 ADDCH(buf, ' ');
269 for (i = 0; i < len; ++i)
270 ADDCH(buf, *s++);
271 while (len < field_width--)
272 ADDCH(buf, ' ');
273 return buf;
274 }
275
string16(char * buf,char * end,u16 * s,int field_width,int precision,int flags)276 static char *string16(char *buf, char *end, u16 *s, int field_width,
277 int precision, int flags)
278 {
279 u16 *str = s ? s : L"<NULL>";
280 int utf16_len = utf16_strnlen(str, precision);
281 u8 utf8[utf16_len * MAX_UTF8_PER_UTF16];
282 int utf8_len, i;
283
284 utf8_len = utf16_to_utf8(utf8, str, utf16_len) - utf8;
285
286 if (!(flags & LEFT))
287 while (utf8_len < field_width--)
288 ADDCH(buf, ' ');
289 for (i = 0; i < utf8_len; ++i)
290 ADDCH(buf, utf8[i]);
291 while (utf8_len < field_width--)
292 ADDCH(buf, ' ');
293 return buf;
294 }
295
296 #ifdef CONFIG_CMD_NET
mac_address_string(char * buf,char * end,u8 * addr,int field_width,int precision,int flags)297 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
298 int precision, int flags)
299 {
300 /* (6 * 2 hex digits), 5 colons and trailing zero */
301 char mac_addr[6 * 3];
302 char *p = mac_addr;
303 int i;
304
305 for (i = 0; i < 6; i++) {
306 p = hex_byte_pack(p, addr[i]);
307 if (!(flags & SPECIAL) && i != 5)
308 *p++ = ':';
309 }
310 *p = '\0';
311
312 return string(buf, end, mac_addr, field_width, precision,
313 flags & ~SPECIAL);
314 }
315
ip6_addr_string(char * buf,char * end,u8 * addr,int field_width,int precision,int flags)316 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
317 int precision, int flags)
318 {
319 /* (8 * 4 hex digits), 7 colons and trailing zero */
320 char ip6_addr[8 * 5];
321 char *p = ip6_addr;
322 int i;
323
324 for (i = 0; i < 8; i++) {
325 p = hex_byte_pack(p, addr[2 * i]);
326 p = hex_byte_pack(p, addr[2 * i + 1]);
327 if (!(flags & SPECIAL) && i != 7)
328 *p++ = ':';
329 }
330 *p = '\0';
331
332 return string(buf, end, ip6_addr, field_width, precision,
333 flags & ~SPECIAL);
334 }
335
ip4_addr_string(char * buf,char * end,u8 * addr,int field_width,int precision,int flags)336 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
337 int precision, int flags)
338 {
339 /* (4 * 3 decimal digits), 3 dots and trailing zero */
340 char ip4_addr[4 * 4];
341 char temp[3]; /* hold each IP quad in reverse order */
342 char *p = ip4_addr;
343 int i, digits;
344
345 for (i = 0; i < 4; i++) {
346 digits = put_dec_trunc(temp, addr[i]) - temp;
347 /* reverse the digits in the quad */
348 while (digits--)
349 *p++ = temp[digits];
350 if (i != 3)
351 *p++ = '.';
352 }
353 *p = '\0';
354
355 return string(buf, end, ip4_addr, field_width, precision,
356 flags & ~SPECIAL);
357 }
358 #endif
359
360 #ifdef CONFIG_LIB_UUID
361 /*
362 * This works (roughly) the same way as linux's, but we currently always
363 * print lower-case (ie. we just keep %pUB and %pUL for compat with linux),
364 * mostly just because that is what uuid_bin_to_str() supports.
365 *
366 * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10
367 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10
368 */
uuid_string(char * buf,char * end,u8 * addr,int field_width,int precision,int flags,const char * fmt)369 static char *uuid_string(char *buf, char *end, u8 *addr, int field_width,
370 int precision, int flags, const char *fmt)
371 {
372 char uuid[UUID_STR_LEN + 1];
373 int str_format = UUID_STR_FORMAT_STD;
374
375 switch (*(++fmt)) {
376 case 'L':
377 case 'l':
378 str_format = UUID_STR_FORMAT_GUID;
379 break;
380 case 'B':
381 case 'b':
382 /* this is the default */
383 break;
384 default:
385 break;
386 }
387
388 uuid_bin_to_str(addr, uuid, str_format);
389
390 return string(buf, end, uuid, field_width, precision, flags);
391 }
392 #endif
393
394 /*
395 * Show a '%p' thing. A kernel extension is that the '%p' is followed
396 * by an extra set of alphanumeric characters that are extended format
397 * specifiers.
398 *
399 * Right now we handle:
400 *
401 * - 'M' For a 6-byte MAC address, it prints the address in the
402 * usual colon-separated hex notation
403 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
404 * decimal for v4 and colon separated network-order 16 bit hex for v6)
405 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
406 * currently the same
407 *
408 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
409 * function pointers are really function descriptors, which contain a
410 * pointer to the real address.
411 */
pointer(const char * fmt,char * buf,char * end,void * ptr,int field_width,int precision,int flags)412 static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
413 int field_width, int precision, int flags)
414 {
415 u64 num = (uintptr_t)ptr;
416
417 /*
418 * Being a boot loader, we explicitly allow pointers to
419 * (physical) address null.
420 */
421 #if 0
422 if (!ptr)
423 return string(buf, end, "(null)", field_width, precision,
424 flags);
425 #endif
426
427 switch (*fmt) {
428 #ifdef CONFIG_CMD_NET
429 case 'a':
430 flags |= SPECIAL | ZEROPAD;
431
432 switch (fmt[1]) {
433 case 'p':
434 default:
435 field_width = sizeof(phys_addr_t) * 2 + 2;
436 num = *(phys_addr_t *)ptr;
437 break;
438 }
439 break;
440 case 'm':
441 flags |= SPECIAL;
442 /* Fallthrough */
443 case 'M':
444 return mac_address_string(buf, end, ptr, field_width,
445 precision, flags);
446 case 'i':
447 flags |= SPECIAL;
448 /* Fallthrough */
449 case 'I':
450 if (fmt[1] == '6')
451 return ip6_addr_string(buf, end, ptr, field_width,
452 precision, flags);
453 if (fmt[1] == '4')
454 return ip4_addr_string(buf, end, ptr, field_width,
455 precision, flags);
456 flags &= ~SPECIAL;
457 break;
458 #endif
459 #ifdef CONFIG_LIB_UUID
460 case 'U':
461 return uuid_string(buf, end, ptr, field_width, precision,
462 flags, fmt);
463 #endif
464 default:
465 break;
466 }
467 flags |= SMALL;
468 if (field_width == -1) {
469 field_width = 2*sizeof(void *);
470 flags |= ZEROPAD;
471 }
472 return number(buf, end, num, 16, field_width, precision, flags);
473 }
474
vsnprintf_internal(char * buf,size_t size,const char * fmt,va_list args)475 static int vsnprintf_internal(char *buf, size_t size, const char *fmt,
476 va_list args)
477 {
478 u64 num;
479 int base;
480 char *str;
481
482 int flags; /* flags to number() */
483
484 int field_width; /* width of output field */
485 int precision; /* min. # of digits for integers; max
486 number of chars for from string */
487 int qualifier; /* 'h', 'l', or 'L' for integer fields */
488 /* 'z' support added 23/7/1999 S.H. */
489 /* 'z' changed to 'Z' --davidm 1/25/99 */
490 /* 't' added for ptrdiff_t */
491 char *end = buf + size;
492
493 /* Make sure end is always >= buf - do we want this in U-Boot? */
494 if (end < buf) {
495 end = ((void *)-1);
496 size = end - buf;
497 }
498 str = buf;
499
500 for (; *fmt ; ++fmt) {
501 if (*fmt != '%') {
502 ADDCH(str, *fmt);
503 continue;
504 }
505
506 /* process flags */
507 flags = 0;
508 repeat:
509 ++fmt; /* this also skips first '%' */
510 switch (*fmt) {
511 case '-':
512 flags |= LEFT;
513 goto repeat;
514 case '+':
515 flags |= PLUS;
516 goto repeat;
517 case ' ':
518 flags |= SPACE;
519 goto repeat;
520 case '#':
521 flags |= SPECIAL;
522 goto repeat;
523 case '0':
524 flags |= ZEROPAD;
525 goto repeat;
526 }
527
528 /* get field width */
529 field_width = -1;
530 if (is_digit(*fmt))
531 field_width = skip_atoi(&fmt);
532 else if (*fmt == '*') {
533 ++fmt;
534 /* it's the next argument */
535 field_width = va_arg(args, int);
536 if (field_width < 0) {
537 field_width = -field_width;
538 flags |= LEFT;
539 }
540 }
541
542 /* get the precision */
543 precision = -1;
544 if (*fmt == '.') {
545 ++fmt;
546 if (is_digit(*fmt))
547 precision = skip_atoi(&fmt);
548 else if (*fmt == '*') {
549 ++fmt;
550 /* it's the next argument */
551 precision = va_arg(args, int);
552 }
553 if (precision < 0)
554 precision = 0;
555 }
556
557 /* get the conversion qualifier */
558 qualifier = -1;
559 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
560 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
561 qualifier = *fmt;
562 ++fmt;
563 if (qualifier == 'l' && *fmt == 'l') {
564 qualifier = 'L';
565 ++fmt;
566 }
567 }
568
569 /* default base */
570 base = 10;
571
572 switch (*fmt) {
573 case 'c':
574 if (!(flags & LEFT)) {
575 while (--field_width > 0)
576 ADDCH(str, ' ');
577 }
578 ADDCH(str, (unsigned char) va_arg(args, int));
579 while (--field_width > 0)
580 ADDCH(str, ' ');
581 continue;
582
583 case 's':
584 if (qualifier == 'l' && !IS_ENABLED(CONFIG_SPL_BUILD)) {
585 str = string16(str, end, va_arg(args, u16 *),
586 field_width, precision, flags);
587 } else {
588 str = string(str, end, va_arg(args, char *),
589 field_width, precision, flags);
590 }
591 continue;
592
593 case 'p':
594 str = pointer(fmt + 1, str, end,
595 va_arg(args, void *),
596 field_width, precision, flags);
597 /* Skip all alphanumeric pointer suffixes */
598 while (isalnum(fmt[1]))
599 fmt++;
600 continue;
601
602 case 'n':
603 if (qualifier == 'l') {
604 long *ip = va_arg(args, long *);
605 *ip = (str - buf);
606 } else {
607 int *ip = va_arg(args, int *);
608 *ip = (str - buf);
609 }
610 continue;
611
612 case '%':
613 ADDCH(str, '%');
614 continue;
615
616 /* integer number formats - set up the flags and "break" */
617 case 'o':
618 base = 8;
619 break;
620
621 case 'x':
622 flags |= SMALL;
623 case 'X':
624 base = 16;
625 break;
626
627 case 'd':
628 case 'i':
629 flags |= SIGN;
630 case 'u':
631 break;
632
633 default:
634 ADDCH(str, '%');
635 if (*fmt)
636 ADDCH(str, *fmt);
637 else
638 --fmt;
639 continue;
640 }
641 if (qualifier == 'L') /* "quad" for 64 bit variables */
642 num = va_arg(args, unsigned long long);
643 else if (qualifier == 'l') {
644 num = va_arg(args, unsigned long);
645 if (flags & SIGN)
646 num = (signed long) num;
647 } else if (qualifier == 'Z' || qualifier == 'z') {
648 num = va_arg(args, size_t);
649 } else if (qualifier == 't') {
650 num = va_arg(args, ptrdiff_t);
651 } else if (qualifier == 'h') {
652 num = (unsigned short) va_arg(args, int);
653 if (flags & SIGN)
654 num = (signed short) num;
655 } else {
656 num = va_arg(args, unsigned int);
657 if (flags & SIGN)
658 num = (signed int) num;
659 }
660 str = number(str, end, num, base, field_width, precision,
661 flags);
662 }
663
664 if (size > 0) {
665 ADDCH(str, '\0');
666 if (str > end)
667 end[-1] = '\0';
668 --str;
669 }
670 /* the trailing null byte doesn't count towards the total */
671 return str - buf;
672 }
673
vsnprintf(char * buf,size_t size,const char * fmt,va_list args)674 int vsnprintf(char *buf, size_t size, const char *fmt,
675 va_list args)
676 {
677 return vsnprintf_internal(buf, size, fmt, args);
678 }
679
vscnprintf(char * buf,size_t size,const char * fmt,va_list args)680 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
681 {
682 int i;
683
684 i = vsnprintf(buf, size, fmt, args);
685
686 if (likely(i < size))
687 return i;
688 if (size != 0)
689 return size - 1;
690 return 0;
691 }
692
snprintf(char * buf,size_t size,const char * fmt,...)693 int snprintf(char *buf, size_t size, const char *fmt, ...)
694 {
695 va_list args;
696 int i;
697
698 va_start(args, fmt);
699 i = vsnprintf(buf, size, fmt, args);
700 va_end(args);
701
702 return i;
703 }
704
scnprintf(char * buf,size_t size,const char * fmt,...)705 int scnprintf(char *buf, size_t size, const char *fmt, ...)
706 {
707 va_list args;
708 int i;
709
710 va_start(args, fmt);
711 i = vscnprintf(buf, size, fmt, args);
712 va_end(args);
713
714 return i;
715 }
716
717 /**
718 * Format a string and place it in a buffer (va_list version)
719 *
720 * @param buf The buffer to place the result into
721 * @param fmt The format string to use
722 * @param args Arguments for the format string
723 *
724 * The function returns the number of characters written
725 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
726 * buffer overflows.
727 *
728 * If you're not already dealing with a va_list consider using sprintf().
729 */
vsprintf(char * buf,const char * fmt,va_list args)730 int vsprintf(char *buf, const char *fmt, va_list args)
731 {
732 return vsnprintf_internal(buf, INT_MAX, fmt, args);
733 }
734
sprintf(char * buf,const char * fmt,...)735 int sprintf(char *buf, const char *fmt, ...)
736 {
737 va_list args;
738 int i;
739
740 va_start(args, fmt);
741 i = vsprintf(buf, fmt, args);
742 va_end(args);
743 return i;
744 }
745
printf(const char * fmt,...)746 int printf(const char *fmt, ...)
747 {
748 va_list args;
749 uint i;
750 char printbuffer[CONFIG_SYS_PBSIZE];
751
752 va_start(args, fmt);
753
754 /*
755 * For this to work, printbuffer must be larger than
756 * anything we ever want to print.
757 */
758 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
759 va_end(args);
760
761 /* Print the string */
762 puts(printbuffer);
763 return i;
764 }
765
vprintf(const char * fmt,va_list args)766 int vprintf(const char *fmt, va_list args)
767 {
768 uint i;
769 char printbuffer[CONFIG_SYS_PBSIZE];
770
771 /*
772 * For this to work, printbuffer must be larger than
773 * anything we ever want to print.
774 */
775 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
776
777 /* Print the string */
778 puts(printbuffer);
779 return i;
780 }
781
782
__assert_fail(const char * assertion,const char * file,unsigned line,const char * function)783 void __assert_fail(const char *assertion, const char *file, unsigned line,
784 const char *function)
785 {
786 /* This will not return */
787 panic("%s:%u: %s: Assertion `%s' failed.", file, line, function,
788 assertion);
789 }
790
simple_itoa(ulong i)791 char *simple_itoa(ulong i)
792 {
793 /* 21 digits plus null terminator, good for 64-bit or smaller ints */
794 static char local[22];
795 char *p = &local[21];
796
797 *p-- = '\0';
798 do {
799 *p-- = '0' + i % 10;
800 i /= 10;
801 } while (i > 0);
802 return p + 1;
803 }
804
805 /* We don't seem to have %'d in U-Boot */
print_grouped_ull(unsigned long long int_val,int digits)806 void print_grouped_ull(unsigned long long int_val, int digits)
807 {
808 char str[21], *s;
809 int grab = 3;
810
811 digits = (digits + 2) / 3;
812 sprintf(str, "%*llu", digits * 3, int_val);
813 for (s = str; *s; s += grab) {
814 if (s != str)
815 putc(s[-1] != ' ' ? ',' : ' ');
816 printf("%.*s", grab, s);
817 grab = 3;
818 }
819 }
820
str2off(const char * p,loff_t * num)821 bool str2off(const char *p, loff_t *num)
822 {
823 char *endptr;
824
825 *num = simple_strtoull(p, &endptr, 16);
826 return *p != '\0' && *endptr == '\0';
827 }
828
str2long(const char * p,ulong * num)829 bool str2long(const char *p, ulong *num)
830 {
831 char *endptr;
832
833 *num = simple_strtoul(p, &endptr, 16);
834 return *p != '\0' && *endptr == '\0';
835 }
836