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 <stdarg.h> 15 #include <linux/types.h> 16 #include <linux/string.h> 17 #include <linux/ctype.h> 18 #include <errno.h> 19 20 #include <common.h> 21 #if !defined(CONFIG_PANIC_HANG) 22 #include <command.h> 23 #endif 24 25 #include <div64.h> 26 #define noinline __attribute__((noinline)) 27 28 /* some reluctance to put this into a new limits.h, so it is here */ 29 #define INT_MAX ((int)(~0U>>1)) 30 31 static const char hex_asc[] = "0123456789abcdef"; 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 42 unsigned long simple_strtoul(const char *cp, char **endp, 43 unsigned int base) 44 { 45 unsigned long result = 0; 46 unsigned long value; 47 48 if (*cp == '0') { 49 cp++; 50 if ((*cp == 'x') && isxdigit(cp[1])) { 51 base = 16; 52 cp++; 53 } 54 55 if (!base) 56 base = 8; 57 } 58 59 if (!base) 60 base = 10; 61 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 } 67 68 if (endp) 69 *endp = (char *)cp; 70 71 return result; 72 } 73 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 98 long simple_strtol(const char *cp, char **endp, unsigned int base) 99 { 100 if (*cp == '-') 101 return -simple_strtoul(cp + 1, endp, base); 102 103 return simple_strtoul(cp, endp, base); 104 } 105 106 unsigned long ustrtoul(const char *cp, char **endp, unsigned int base) 107 { 108 unsigned long result = simple_strtoul(cp, endp, base); 109 switch (**endp) { 110 case 'G': 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 } 128 129 unsigned long long ustrtoull(const char *cp, char **endp, unsigned int base) 130 { 131 unsigned long long result = simple_strtoull(cp, endp, base); 132 switch (**endp) { 133 case 'G': 134 result *= 1024; 135 /* fall through */ 136 case 'M': 137 result *= 1024; 138 /* fall through */ 139 case 'K': 140 case 'k': 141 result *= 1024; 142 if ((*endp)[1] == 'i') { 143 if ((*endp)[2] == 'B') 144 (*endp) += 3; 145 else 146 (*endp) += 2; 147 } 148 } 149 return result; 150 } 151 152 unsigned long long simple_strtoull(const char *cp, char **endp, 153 unsigned int base) 154 { 155 unsigned long long result = 0, value; 156 157 if (*cp == '0') { 158 cp++; 159 if ((*cp == 'x') && isxdigit(cp[1])) { 160 base = 16; 161 cp++; 162 } 163 164 if (!base) 165 base = 8; 166 } 167 168 if (!base) 169 base = 10; 170 171 while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp - '0' 172 : (islower(*cp) ? toupper(*cp) : *cp) - 'A' + 10) < base) { 173 result = result * base + value; 174 cp++; 175 } 176 177 if (endp) 178 *endp = (char *) cp; 179 180 return result; 181 } 182 183 /* we use this so that we can do without the ctype library */ 184 #define is_digit(c) ((c) >= '0' && (c) <= '9') 185 186 static int skip_atoi(const char **s) 187 { 188 int i = 0; 189 190 while (is_digit(**s)) 191 i = i * 10 + *((*s)++) - '0'; 192 193 return i; 194 } 195 196 /* Decimal conversion is by far the most typical, and is used 197 * for /proc and /sys data. This directly impacts e.g. top performance 198 * with many processes running. We optimize it for speed 199 * using code from 200 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html 201 * (with permission from the author, Douglas W. Jones). */ 202 203 /* Formats correctly any integer in [0,99999]. 204 * Outputs from one to five digits depending on input. 205 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ 206 static char *put_dec_trunc(char *buf, unsigned q) 207 { 208 unsigned d3, d2, d1, d0; 209 d1 = (q>>4) & 0xf; 210 d2 = (q>>8) & 0xf; 211 d3 = (q>>12); 212 213 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 214 q = (d0 * 0xcd) >> 11; 215 d0 = d0 - 10*q; 216 *buf++ = d0 + '0'; /* least significant digit */ 217 d1 = q + 9*d3 + 5*d2 + d1; 218 if (d1 != 0) { 219 q = (d1 * 0xcd) >> 11; 220 d1 = d1 - 10*q; 221 *buf++ = d1 + '0'; /* next digit */ 222 223 d2 = q + 2*d2; 224 if ((d2 != 0) || (d3 != 0)) { 225 q = (d2 * 0xd) >> 7; 226 d2 = d2 - 10*q; 227 *buf++ = d2 + '0'; /* next digit */ 228 229 d3 = q + 4*d3; 230 if (d3 != 0) { 231 q = (d3 * 0xcd) >> 11; 232 d3 = d3 - 10*q; 233 *buf++ = d3 + '0'; /* next digit */ 234 if (q != 0) 235 *buf++ = q + '0'; /* most sign. digit */ 236 } 237 } 238 } 239 return buf; 240 } 241 /* Same with if's removed. Always emits five digits */ 242 static char *put_dec_full(char *buf, unsigned q) 243 { 244 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ 245 /* but anyway, gcc produces better code with full-sized ints */ 246 unsigned d3, d2, d1, d0; 247 d1 = (q>>4) & 0xf; 248 d2 = (q>>8) & 0xf; 249 d3 = (q>>12); 250 251 /* 252 * Possible ways to approx. divide by 10 253 * gcc -O2 replaces multiply with shifts and adds 254 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) 255 * (x * 0x67) >> 10: 1100111 256 * (x * 0x34) >> 9: 110100 - same 257 * (x * 0x1a) >> 8: 11010 - same 258 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) 259 */ 260 261 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 262 q = (d0 * 0xcd) >> 11; 263 d0 = d0 - 10*q; 264 *buf++ = d0 + '0'; 265 d1 = q + 9*d3 + 5*d2 + d1; 266 q = (d1 * 0xcd) >> 11; 267 d1 = d1 - 10*q; 268 *buf++ = d1 + '0'; 269 270 d2 = q + 2*d2; 271 q = (d2 * 0xd) >> 7; 272 d2 = d2 - 10*q; 273 *buf++ = d2 + '0'; 274 275 d3 = q + 4*d3; 276 q = (d3 * 0xcd) >> 11; /* - shorter code */ 277 /* q = (d3 * 0x67) >> 10; - would also work */ 278 d3 = d3 - 10*q; 279 *buf++ = d3 + '0'; 280 *buf++ = q + '0'; 281 return buf; 282 } 283 /* No inlining helps gcc to use registers better */ 284 static noinline char *put_dec(char *buf, u64 num) 285 { 286 while (1) { 287 unsigned rem; 288 if (num < 100000) 289 return put_dec_trunc(buf, num); 290 rem = do_div(num, 100000); 291 buf = put_dec_full(buf, rem); 292 } 293 } 294 295 #define ZEROPAD 1 /* pad with zero */ 296 #define SIGN 2 /* unsigned/signed long */ 297 #define PLUS 4 /* show plus */ 298 #define SPACE 8 /* space if plus */ 299 #define LEFT 16 /* left justified */ 300 #define SMALL 32 /* Must be 32 == 0x20 */ 301 #define SPECIAL 64 /* 0x */ 302 303 #ifdef CONFIG_SYS_VSNPRINTF 304 /* 305 * Macro to add a new character to our output string, but only if it will 306 * fit. The macro moves to the next character position in the output string. 307 */ 308 #define ADDCH(str, ch) do { \ 309 if ((str) < end) \ 310 *(str) = (ch); \ 311 ++str; \ 312 } while (0) 313 #else 314 #define ADDCH(str, ch) (*(str)++ = (ch)) 315 #endif 316 317 static char *number(char *buf, char *end, u64 num, 318 int base, int size, int precision, int type) 319 { 320 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ 321 static const char digits[16] = "0123456789ABCDEF"; 322 323 char tmp[66]; 324 char sign; 325 char locase; 326 int need_pfx = ((type & SPECIAL) && base != 10); 327 int i; 328 329 /* locase = 0 or 0x20. ORing digits or letters with 'locase' 330 * produces same digits or (maybe lowercased) letters */ 331 locase = (type & SMALL); 332 if (type & LEFT) 333 type &= ~ZEROPAD; 334 sign = 0; 335 if (type & SIGN) { 336 if ((s64) num < 0) { 337 sign = '-'; 338 num = -(s64) num; 339 size--; 340 } else if (type & PLUS) { 341 sign = '+'; 342 size--; 343 } else if (type & SPACE) { 344 sign = ' '; 345 size--; 346 } 347 } 348 if (need_pfx) { 349 size--; 350 if (base == 16) 351 size--; 352 } 353 354 /* generate full string in tmp[], in reverse order */ 355 i = 0; 356 if (num == 0) 357 tmp[i++] = '0'; 358 /* Generic code, for any base: 359 else do { 360 tmp[i++] = (digits[do_div(num,base)] | locase); 361 } while (num != 0); 362 */ 363 else if (base != 10) { /* 8 or 16 */ 364 int mask = base - 1; 365 int shift = 3; 366 367 if (base == 16) 368 shift = 4; 369 370 do { 371 tmp[i++] = (digits[((unsigned char)num) & mask] 372 | locase); 373 num >>= shift; 374 } while (num); 375 } else { /* base 10 */ 376 i = put_dec(tmp, num) - tmp; 377 } 378 379 /* printing 100 using %2d gives "100", not "00" */ 380 if (i > precision) 381 precision = i; 382 /* leading space padding */ 383 size -= precision; 384 if (!(type & (ZEROPAD + LEFT))) { 385 while (--size >= 0) 386 ADDCH(buf, ' '); 387 } 388 /* sign */ 389 if (sign) 390 ADDCH(buf, sign); 391 /* "0x" / "0" prefix */ 392 if (need_pfx) { 393 ADDCH(buf, '0'); 394 if (base == 16) 395 ADDCH(buf, 'X' | locase); 396 } 397 /* zero or space padding */ 398 if (!(type & LEFT)) { 399 char c = (type & ZEROPAD) ? '0' : ' '; 400 401 while (--size >= 0) 402 ADDCH(buf, c); 403 } 404 /* hmm even more zero padding? */ 405 while (i <= --precision) 406 ADDCH(buf, '0'); 407 /* actual digits of result */ 408 while (--i >= 0) 409 ADDCH(buf, tmp[i]); 410 /* trailing space padding */ 411 while (--size >= 0) 412 ADDCH(buf, ' '); 413 return buf; 414 } 415 416 static char *string(char *buf, char *end, char *s, int field_width, 417 int precision, int flags) 418 { 419 int len, i; 420 421 if (s == NULL) 422 s = "<NULL>"; 423 424 len = strnlen(s, precision); 425 426 if (!(flags & LEFT)) 427 while (len < field_width--) 428 ADDCH(buf, ' '); 429 for (i = 0; i < len; ++i) 430 ADDCH(buf, *s++); 431 while (len < field_width--) 432 ADDCH(buf, ' '); 433 return buf; 434 } 435 436 #ifdef CONFIG_CMD_NET 437 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, 438 int precision, int flags) 439 { 440 /* (6 * 2 hex digits), 5 colons and trailing zero */ 441 char mac_addr[6 * 3]; 442 char *p = mac_addr; 443 int i; 444 445 for (i = 0; i < 6; i++) { 446 p = pack_hex_byte(p, addr[i]); 447 if (!(flags & SPECIAL) && i != 5) 448 *p++ = ':'; 449 } 450 *p = '\0'; 451 452 return string(buf, end, mac_addr, field_width, precision, 453 flags & ~SPECIAL); 454 } 455 456 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, 457 int precision, int flags) 458 { 459 /* (8 * 4 hex digits), 7 colons and trailing zero */ 460 char ip6_addr[8 * 5]; 461 char *p = ip6_addr; 462 int i; 463 464 for (i = 0; i < 8; i++) { 465 p = pack_hex_byte(p, addr[2 * i]); 466 p = pack_hex_byte(p, addr[2 * i + 1]); 467 if (!(flags & SPECIAL) && i != 7) 468 *p++ = ':'; 469 } 470 *p = '\0'; 471 472 return string(buf, end, ip6_addr, field_width, precision, 473 flags & ~SPECIAL); 474 } 475 476 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, 477 int precision, int flags) 478 { 479 /* (4 * 3 decimal digits), 3 dots and trailing zero */ 480 char ip4_addr[4 * 4]; 481 char temp[3]; /* hold each IP quad in reverse order */ 482 char *p = ip4_addr; 483 int i, digits; 484 485 for (i = 0; i < 4; i++) { 486 digits = put_dec_trunc(temp, addr[i]) - temp; 487 /* reverse the digits in the quad */ 488 while (digits--) 489 *p++ = temp[digits]; 490 if (i != 3) 491 *p++ = '.'; 492 } 493 *p = '\0'; 494 495 return string(buf, end, ip4_addr, field_width, precision, 496 flags & ~SPECIAL); 497 } 498 #endif 499 500 /* 501 * Show a '%p' thing. A kernel extension is that the '%p' is followed 502 * by an extra set of alphanumeric characters that are extended format 503 * specifiers. 504 * 505 * Right now we handle: 506 * 507 * - 'M' For a 6-byte MAC address, it prints the address in the 508 * usual colon-separated hex notation 509 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated 510 * decimal for v4 and colon separated network-order 16 bit hex for v6) 511 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is 512 * currently the same 513 * 514 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 515 * function pointers are really function descriptors, which contain a 516 * pointer to the real address. 517 */ 518 static char *pointer(const char *fmt, char *buf, char *end, void *ptr, 519 int field_width, int precision, int flags) 520 { 521 /* 522 * Being a boot loader, we explicitly allow pointers to 523 * (physical) address null. 524 */ 525 #if 0 526 if (!ptr) 527 return string(buf, end, "(null)", field_width, precision, 528 flags); 529 #endif 530 531 #ifdef CONFIG_CMD_NET 532 switch (*fmt) { 533 case 'm': 534 flags |= SPECIAL; 535 /* Fallthrough */ 536 case 'M': 537 return mac_address_string(buf, end, ptr, field_width, 538 precision, flags); 539 case 'i': 540 flags |= SPECIAL; 541 /* Fallthrough */ 542 case 'I': 543 if (fmt[1] == '6') 544 return ip6_addr_string(buf, end, ptr, field_width, 545 precision, flags); 546 if (fmt[1] == '4') 547 return ip4_addr_string(buf, end, ptr, field_width, 548 precision, flags); 549 flags &= ~SPECIAL; 550 break; 551 } 552 #endif 553 flags |= SMALL; 554 if (field_width == -1) { 555 field_width = 2*sizeof(void *); 556 flags |= ZEROPAD; 557 } 558 return number(buf, end, (unsigned long)ptr, 16, field_width, 559 precision, flags); 560 } 561 562 static int vsnprintf_internal(char *buf, size_t size, const char *fmt, 563 va_list args) 564 { 565 u64 num; 566 int base; 567 char *str; 568 569 int flags; /* flags to number() */ 570 571 int field_width; /* width of output field */ 572 int precision; /* min. # of digits for integers; max 573 number of chars for from string */ 574 int qualifier; /* 'h', 'l', or 'L' for integer fields */ 575 /* 'z' support added 23/7/1999 S.H. */ 576 /* 'z' changed to 'Z' --davidm 1/25/99 */ 577 /* 't' added for ptrdiff_t */ 578 char *end = buf + size; 579 580 #ifdef CONFIG_SYS_VSNPRINTF 581 /* Make sure end is always >= buf - do we want this in U-Boot? */ 582 if (end < buf) { 583 end = ((void *)-1); 584 size = end - buf; 585 } 586 #endif 587 str = buf; 588 589 for (; *fmt ; ++fmt) { 590 if (*fmt != '%') { 591 ADDCH(str, *fmt); 592 continue; 593 } 594 595 /* process flags */ 596 flags = 0; 597 repeat: 598 ++fmt; /* this also skips first '%' */ 599 switch (*fmt) { 600 case '-': 601 flags |= LEFT; 602 goto repeat; 603 case '+': 604 flags |= PLUS; 605 goto repeat; 606 case ' ': 607 flags |= SPACE; 608 goto repeat; 609 case '#': 610 flags |= SPECIAL; 611 goto repeat; 612 case '0': 613 flags |= ZEROPAD; 614 goto repeat; 615 } 616 617 /* get field width */ 618 field_width = -1; 619 if (is_digit(*fmt)) 620 field_width = skip_atoi(&fmt); 621 else if (*fmt == '*') { 622 ++fmt; 623 /* it's the next argument */ 624 field_width = va_arg(args, int); 625 if (field_width < 0) { 626 field_width = -field_width; 627 flags |= LEFT; 628 } 629 } 630 631 /* get the precision */ 632 precision = -1; 633 if (*fmt == '.') { 634 ++fmt; 635 if (is_digit(*fmt)) 636 precision = skip_atoi(&fmt); 637 else if (*fmt == '*') { 638 ++fmt; 639 /* it's the next argument */ 640 precision = va_arg(args, int); 641 } 642 if (precision < 0) 643 precision = 0; 644 } 645 646 /* get the conversion qualifier */ 647 qualifier = -1; 648 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || 649 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { 650 qualifier = *fmt; 651 ++fmt; 652 if (qualifier == 'l' && *fmt == 'l') { 653 qualifier = 'L'; 654 ++fmt; 655 } 656 } 657 658 /* default base */ 659 base = 10; 660 661 switch (*fmt) { 662 case 'c': 663 if (!(flags & LEFT)) { 664 while (--field_width > 0) 665 ADDCH(str, ' '); 666 } 667 ADDCH(str, (unsigned char) va_arg(args, int)); 668 while (--field_width > 0) 669 ADDCH(str, ' '); 670 continue; 671 672 case 's': 673 str = string(str, end, va_arg(args, char *), 674 field_width, precision, flags); 675 continue; 676 677 case 'p': 678 str = pointer(fmt + 1, str, end, 679 va_arg(args, void *), 680 field_width, precision, flags); 681 /* Skip all alphanumeric pointer suffixes */ 682 while (isalnum(fmt[1])) 683 fmt++; 684 continue; 685 686 case 'n': 687 if (qualifier == 'l') { 688 long *ip = va_arg(args, long *); 689 *ip = (str - buf); 690 } else { 691 int *ip = va_arg(args, int *); 692 *ip = (str - buf); 693 } 694 continue; 695 696 case '%': 697 ADDCH(str, '%'); 698 continue; 699 700 /* integer number formats - set up the flags and "break" */ 701 case 'o': 702 base = 8; 703 break; 704 705 case 'x': 706 flags |= SMALL; 707 case 'X': 708 base = 16; 709 break; 710 711 case 'd': 712 case 'i': 713 flags |= SIGN; 714 case 'u': 715 break; 716 717 default: 718 ADDCH(str, '%'); 719 if (*fmt) 720 ADDCH(str, *fmt); 721 else 722 --fmt; 723 continue; 724 } 725 if (qualifier == 'L') /* "quad" for 64 bit variables */ 726 num = va_arg(args, unsigned long long); 727 else if (qualifier == 'l') { 728 num = va_arg(args, unsigned long); 729 if (flags & SIGN) 730 num = (signed long) num; 731 } else if (qualifier == 'Z' || qualifier == 'z') { 732 num = va_arg(args, size_t); 733 } else if (qualifier == 't') { 734 num = va_arg(args, ptrdiff_t); 735 } else if (qualifier == 'h') { 736 num = (unsigned short) va_arg(args, int); 737 if (flags & SIGN) 738 num = (signed short) num; 739 } else { 740 num = va_arg(args, unsigned int); 741 if (flags & SIGN) 742 num = (signed int) num; 743 } 744 str = number(str, end, num, base, field_width, precision, 745 flags); 746 } 747 748 #ifdef CONFIG_SYS_VSNPRINTF 749 if (size > 0) { 750 ADDCH(str, '\0'); 751 if (str > end) 752 end[-1] = '\0'; 753 } 754 #else 755 *str = '\0'; 756 #endif 757 /* the trailing null byte doesn't count towards the total */ 758 return str - buf; 759 } 760 761 #ifdef CONFIG_SYS_VSNPRINTF 762 int vsnprintf(char *buf, size_t size, const char *fmt, 763 va_list args) 764 { 765 return vsnprintf_internal(buf, size, fmt, args); 766 } 767 768 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 769 { 770 int i; 771 772 i = vsnprintf(buf, size, fmt, args); 773 774 if (likely(i < size)) 775 return i; 776 if (size != 0) 777 return size - 1; 778 return 0; 779 } 780 781 int snprintf(char *buf, size_t size, const char *fmt, ...) 782 { 783 va_list args; 784 int i; 785 786 va_start(args, fmt); 787 i = vsnprintf(buf, size, fmt, args); 788 va_end(args); 789 790 return i; 791 } 792 793 int scnprintf(char *buf, size_t size, const char *fmt, ...) 794 { 795 va_list args; 796 int i; 797 798 va_start(args, fmt); 799 i = vscnprintf(buf, size, fmt, args); 800 va_end(args); 801 802 return i; 803 } 804 #endif /* CONFIG_SYS_VSNPRINT */ 805 806 /** 807 * Format a string and place it in a buffer (va_list version) 808 * 809 * @param buf The buffer to place the result into 810 * @param fmt The format string to use 811 * @param args Arguments for the format string 812 * 813 * The function returns the number of characters written 814 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid 815 * buffer overflows. 816 * 817 * If you're not already dealing with a va_list consider using sprintf(). 818 */ 819 int vsprintf(char *buf, const char *fmt, va_list args) 820 { 821 return vsnprintf_internal(buf, INT_MAX, fmt, args); 822 } 823 824 int sprintf(char *buf, const char *fmt, ...) 825 { 826 va_list args; 827 int i; 828 829 va_start(args, fmt); 830 i = vsprintf(buf, fmt, args); 831 va_end(args); 832 return i; 833 } 834 835 void panic(const char *fmt, ...) 836 { 837 va_list args; 838 va_start(args, fmt); 839 vprintf(fmt, args); 840 putc('\n'); 841 va_end(args); 842 #if defined(CONFIG_PANIC_HANG) 843 hang(); 844 #else 845 udelay(100000); /* allow messages to go out */ 846 do_reset(NULL, 0, 0, NULL); 847 #endif 848 while (1) 849 ; 850 } 851 852 void __assert_fail(const char *assertion, const char *file, unsigned line, 853 const char *function) 854 { 855 /* This will not return */ 856 panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, 857 assertion); 858 } 859 860 char *simple_itoa(ulong i) 861 { 862 /* 21 digits plus null terminator, good for 64-bit or smaller ints */ 863 static char local[22]; 864 char *p = &local[21]; 865 866 *p-- = '\0'; 867 do { 868 *p-- = '0' + i % 10; 869 i /= 10; 870 } while (i > 0); 871 return p + 1; 872 } 873 874 /* We don't seem to have %'d in U-Boot */ 875 void print_grouped_ull(unsigned long long int_val, int digits) 876 { 877 char str[21], *s; 878 int grab = 3; 879 880 digits = (digits + 2) / 3; 881 sprintf(str, "%*llu", digits * 3, int_val); 882 for (s = str; *s; s += grab) { 883 if (s != str) 884 putc(s[-1] != ' ' ? ',' : ' '); 885 printf("%.*s", grab, s); 886 grab = 3; 887 } 888 } 889