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 unsigned long simple_strtoul(const char *cp, char **endp, 29 unsigned int base) 30 { 31 unsigned long result = 0; 32 unsigned long value; 33 34 if (*cp == '0') { 35 cp++; 36 if ((*cp == 'x') && isxdigit(cp[1])) { 37 base = 16; 38 cp++; 39 } 40 41 if (!base) 42 base = 8; 43 } 44 45 if (!base) 46 base = 10; 47 48 while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp) 49 ? toupper(*cp) : *cp)-'A'+10) < base) { 50 result = result*base + value; 51 cp++; 52 } 53 54 if (endp) 55 *endp = (char *)cp; 56 57 return result; 58 } 59 60 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) 61 { 62 char *tail; 63 unsigned long val; 64 size_t len; 65 66 *res = 0; 67 len = strlen(cp); 68 if (len == 0) 69 return -EINVAL; 70 71 val = simple_strtoul(cp, &tail, base); 72 if (tail == cp) 73 return -EINVAL; 74 75 if ((*tail == '\0') || 76 ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { 77 *res = val; 78 return 0; 79 } 80 81 return -EINVAL; 82 } 83 84 long simple_strtol(const char *cp, char **endp, unsigned int base) 85 { 86 if (*cp == '-') 87 return -simple_strtoul(cp + 1, endp, base); 88 89 return simple_strtoul(cp, endp, base); 90 } 91 92 unsigned long ustrtoul(const char *cp, char **endp, unsigned int base) 93 { 94 unsigned long result = simple_strtoul(cp, endp, base); 95 switch (**endp) { 96 case 'G': 97 result *= 1024; 98 /* fall through */ 99 case 'M': 100 result *= 1024; 101 /* fall through */ 102 case 'K': 103 case 'k': 104 result *= 1024; 105 if ((*endp)[1] == 'i') { 106 if ((*endp)[2] == 'B') 107 (*endp) += 3; 108 else 109 (*endp) += 2; 110 } 111 } 112 return result; 113 } 114 115 unsigned long long ustrtoull(const char *cp, char **endp, unsigned int base) 116 { 117 unsigned long long result = simple_strtoull(cp, endp, base); 118 switch (**endp) { 119 case 'G': 120 result *= 1024; 121 /* fall through */ 122 case 'M': 123 result *= 1024; 124 /* fall through */ 125 case 'K': 126 case 'k': 127 result *= 1024; 128 if ((*endp)[1] == 'i') { 129 if ((*endp)[2] == 'B') 130 (*endp) += 3; 131 else 132 (*endp) += 2; 133 } 134 } 135 return result; 136 } 137 138 unsigned long long simple_strtoull(const char *cp, char **endp, 139 unsigned int base) 140 { 141 unsigned long long result = 0, value; 142 143 if (*cp == '0') { 144 cp++; 145 if ((*cp == 'x') && isxdigit(cp[1])) { 146 base = 16; 147 cp++; 148 } 149 150 if (!base) 151 base = 8; 152 } 153 154 if (!base) 155 base = 10; 156 157 while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp - '0' 158 : (islower(*cp) ? toupper(*cp) : *cp) - 'A' + 10) < base) { 159 result = result * base + value; 160 cp++; 161 } 162 163 if (endp) 164 *endp = (char *) cp; 165 166 return result; 167 } 168 169 /* we use this so that we can do without the ctype library */ 170 #define is_digit(c) ((c) >= '0' && (c) <= '9') 171 172 static int skip_atoi(const char **s) 173 { 174 int i = 0; 175 176 while (is_digit(**s)) 177 i = i * 10 + *((*s)++) - '0'; 178 179 return i; 180 } 181 182 /* Decimal conversion is by far the most typical, and is used 183 * for /proc and /sys data. This directly impacts e.g. top performance 184 * with many processes running. We optimize it for speed 185 * using code from 186 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html 187 * (with permission from the author, Douglas W. Jones). */ 188 189 /* Formats correctly any integer in [0,99999]. 190 * Outputs from one to five digits depending on input. 191 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ 192 static char *put_dec_trunc(char *buf, unsigned q) 193 { 194 unsigned d3, d2, d1, d0; 195 d1 = (q>>4) & 0xf; 196 d2 = (q>>8) & 0xf; 197 d3 = (q>>12); 198 199 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 200 q = (d0 * 0xcd) >> 11; 201 d0 = d0 - 10*q; 202 *buf++ = d0 + '0'; /* least significant digit */ 203 d1 = q + 9*d3 + 5*d2 + d1; 204 if (d1 != 0) { 205 q = (d1 * 0xcd) >> 11; 206 d1 = d1 - 10*q; 207 *buf++ = d1 + '0'; /* next digit */ 208 209 d2 = q + 2*d2; 210 if ((d2 != 0) || (d3 != 0)) { 211 q = (d2 * 0xd) >> 7; 212 d2 = d2 - 10*q; 213 *buf++ = d2 + '0'; /* next digit */ 214 215 d3 = q + 4*d3; 216 if (d3 != 0) { 217 q = (d3 * 0xcd) >> 11; 218 d3 = d3 - 10*q; 219 *buf++ = d3 + '0'; /* next digit */ 220 if (q != 0) 221 *buf++ = q + '0'; /* most sign. digit */ 222 } 223 } 224 } 225 return buf; 226 } 227 /* Same with if's removed. Always emits five digits */ 228 static char *put_dec_full(char *buf, unsigned q) 229 { 230 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ 231 /* but anyway, gcc produces better code with full-sized ints */ 232 unsigned d3, d2, d1, d0; 233 d1 = (q>>4) & 0xf; 234 d2 = (q>>8) & 0xf; 235 d3 = (q>>12); 236 237 /* 238 * Possible ways to approx. divide by 10 239 * gcc -O2 replaces multiply with shifts and adds 240 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) 241 * (x * 0x67) >> 10: 1100111 242 * (x * 0x34) >> 9: 110100 - same 243 * (x * 0x1a) >> 8: 11010 - same 244 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) 245 */ 246 247 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 248 q = (d0 * 0xcd) >> 11; 249 d0 = d0 - 10*q; 250 *buf++ = d0 + '0'; 251 d1 = q + 9*d3 + 5*d2 + d1; 252 q = (d1 * 0xcd) >> 11; 253 d1 = d1 - 10*q; 254 *buf++ = d1 + '0'; 255 256 d2 = q + 2*d2; 257 q = (d2 * 0xd) >> 7; 258 d2 = d2 - 10*q; 259 *buf++ = d2 + '0'; 260 261 d3 = q + 4*d3; 262 q = (d3 * 0xcd) >> 11; /* - shorter code */ 263 /* q = (d3 * 0x67) >> 10; - would also work */ 264 d3 = d3 - 10*q; 265 *buf++ = d3 + '0'; 266 *buf++ = q + '0'; 267 return buf; 268 } 269 /* No inlining helps gcc to use registers better */ 270 static noinline char *put_dec(char *buf, uint64_t num) 271 { 272 while (1) { 273 unsigned rem; 274 if (num < 100000) 275 return put_dec_trunc(buf, num); 276 rem = do_div(num, 100000); 277 buf = put_dec_full(buf, rem); 278 } 279 } 280 281 #define ZEROPAD 1 /* pad with zero */ 282 #define SIGN 2 /* unsigned/signed long */ 283 #define PLUS 4 /* show plus */ 284 #define SPACE 8 /* space if plus */ 285 #define LEFT 16 /* left justified */ 286 #define SMALL 32 /* Must be 32 == 0x20 */ 287 #define SPECIAL 64 /* 0x */ 288 289 #ifdef CONFIG_SYS_VSNPRINTF 290 /* 291 * Macro to add a new character to our output string, but only if it will 292 * fit. The macro moves to the next character position in the output string. 293 */ 294 #define ADDCH(str, ch) do { \ 295 if ((str) < end) \ 296 *(str) = (ch); \ 297 ++str; \ 298 } while (0) 299 #else 300 #define ADDCH(str, ch) (*(str)++ = (ch)) 301 #endif 302 303 static char *number(char *buf, char *end, u64 num, 304 int base, int size, int precision, int type) 305 { 306 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ 307 static const char digits[16] = "0123456789ABCDEF"; 308 309 char tmp[66]; 310 char sign; 311 char locase; 312 int need_pfx = ((type & SPECIAL) && base != 10); 313 int i; 314 315 /* locase = 0 or 0x20. ORing digits or letters with 'locase' 316 * produces same digits or (maybe lowercased) letters */ 317 locase = (type & SMALL); 318 if (type & LEFT) 319 type &= ~ZEROPAD; 320 sign = 0; 321 if (type & SIGN) { 322 if ((s64) num < 0) { 323 sign = '-'; 324 num = -(s64) num; 325 size--; 326 } else if (type & PLUS) { 327 sign = '+'; 328 size--; 329 } else if (type & SPACE) { 330 sign = ' '; 331 size--; 332 } 333 } 334 if (need_pfx) { 335 size--; 336 if (base == 16) 337 size--; 338 } 339 340 /* generate full string in tmp[], in reverse order */ 341 i = 0; 342 if (num == 0) 343 tmp[i++] = '0'; 344 /* Generic code, for any base: 345 else do { 346 tmp[i++] = (digits[do_div(num,base)] | locase); 347 } while (num != 0); 348 */ 349 else if (base != 10) { /* 8 or 16 */ 350 int mask = base - 1; 351 int shift = 3; 352 353 if (base == 16) 354 shift = 4; 355 356 do { 357 tmp[i++] = (digits[((unsigned char)num) & mask] 358 | locase); 359 num >>= shift; 360 } while (num); 361 } else { /* base 10 */ 362 i = put_dec(tmp, num) - tmp; 363 } 364 365 /* printing 100 using %2d gives "100", not "00" */ 366 if (i > precision) 367 precision = i; 368 /* leading space padding */ 369 size -= precision; 370 if (!(type & (ZEROPAD + LEFT))) { 371 while (--size >= 0) 372 ADDCH(buf, ' '); 373 } 374 /* sign */ 375 if (sign) 376 ADDCH(buf, sign); 377 /* "0x" / "0" prefix */ 378 if (need_pfx) { 379 ADDCH(buf, '0'); 380 if (base == 16) 381 ADDCH(buf, 'X' | locase); 382 } 383 /* zero or space padding */ 384 if (!(type & LEFT)) { 385 char c = (type & ZEROPAD) ? '0' : ' '; 386 387 while (--size >= 0) 388 ADDCH(buf, c); 389 } 390 /* hmm even more zero padding? */ 391 while (i <= --precision) 392 ADDCH(buf, '0'); 393 /* actual digits of result */ 394 while (--i >= 0) 395 ADDCH(buf, tmp[i]); 396 /* trailing space padding */ 397 while (--size >= 0) 398 ADDCH(buf, ' '); 399 return buf; 400 } 401 402 static char *string(char *buf, char *end, char *s, int field_width, 403 int precision, int flags) 404 { 405 int len, i; 406 407 if (s == NULL) 408 s = "<NULL>"; 409 410 len = strnlen(s, precision); 411 412 if (!(flags & LEFT)) 413 while (len < field_width--) 414 ADDCH(buf, ' '); 415 for (i = 0; i < len; ++i) 416 ADDCH(buf, *s++); 417 while (len < field_width--) 418 ADDCH(buf, ' '); 419 return buf; 420 } 421 422 #ifdef CONFIG_CMD_NET 423 static const char hex_asc[] = "0123456789abcdef"; 424 #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] 425 #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] 426 427 static inline char *pack_hex_byte(char *buf, u8 byte) 428 { 429 *buf++ = hex_asc_hi(byte); 430 *buf++ = hex_asc_lo(byte); 431 return buf; 432 } 433 434 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, 435 int precision, int flags) 436 { 437 /* (6 * 2 hex digits), 5 colons and trailing zero */ 438 char mac_addr[6 * 3]; 439 char *p = mac_addr; 440 int i; 441 442 for (i = 0; i < 6; i++) { 443 p = pack_hex_byte(p, addr[i]); 444 if (!(flags & SPECIAL) && i != 5) 445 *p++ = ':'; 446 } 447 *p = '\0'; 448 449 return string(buf, end, mac_addr, field_width, precision, 450 flags & ~SPECIAL); 451 } 452 453 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, 454 int precision, int flags) 455 { 456 /* (8 * 4 hex digits), 7 colons and trailing zero */ 457 char ip6_addr[8 * 5]; 458 char *p = ip6_addr; 459 int i; 460 461 for (i = 0; i < 8; i++) { 462 p = pack_hex_byte(p, addr[2 * i]); 463 p = pack_hex_byte(p, addr[2 * i + 1]); 464 if (!(flags & SPECIAL) && i != 7) 465 *p++ = ':'; 466 } 467 *p = '\0'; 468 469 return string(buf, end, ip6_addr, field_width, precision, 470 flags & ~SPECIAL); 471 } 472 473 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, 474 int precision, int flags) 475 { 476 /* (4 * 3 decimal digits), 3 dots and trailing zero */ 477 char ip4_addr[4 * 4]; 478 char temp[3]; /* hold each IP quad in reverse order */ 479 char *p = ip4_addr; 480 int i, digits; 481 482 for (i = 0; i < 4; i++) { 483 digits = put_dec_trunc(temp, addr[i]) - temp; 484 /* reverse the digits in the quad */ 485 while (digits--) 486 *p++ = temp[digits]; 487 if (i != 3) 488 *p++ = '.'; 489 } 490 *p = '\0'; 491 492 return string(buf, end, ip4_addr, field_width, precision, 493 flags & ~SPECIAL); 494 } 495 #endif 496 497 /* 498 * Show a '%p' thing. A kernel extension is that the '%p' is followed 499 * by an extra set of alphanumeric characters that are extended format 500 * specifiers. 501 * 502 * Right now we handle: 503 * 504 * - 'M' For a 6-byte MAC address, it prints the address in the 505 * usual colon-separated hex notation 506 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated 507 * decimal for v4 and colon separated network-order 16 bit hex for v6) 508 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is 509 * currently the same 510 * 511 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 512 * function pointers are really function descriptors, which contain a 513 * pointer to the real address. 514 */ 515 static char *pointer(const char *fmt, char *buf, char *end, void *ptr, 516 int field_width, int precision, int flags) 517 { 518 /* 519 * Being a boot loader, we explicitly allow pointers to 520 * (physical) address null. 521 */ 522 #if 0 523 if (!ptr) 524 return string(buf, end, "(null)", field_width, precision, 525 flags); 526 #endif 527 528 #ifdef CONFIG_CMD_NET 529 switch (*fmt) { 530 case 'm': 531 flags |= SPECIAL; 532 /* Fallthrough */ 533 case 'M': 534 return mac_address_string(buf, end, ptr, field_width, 535 precision, flags); 536 case 'i': 537 flags |= SPECIAL; 538 /* Fallthrough */ 539 case 'I': 540 if (fmt[1] == '6') 541 return ip6_addr_string(buf, end, ptr, field_width, 542 precision, flags); 543 if (fmt[1] == '4') 544 return ip4_addr_string(buf, end, ptr, field_width, 545 precision, flags); 546 flags &= ~SPECIAL; 547 break; 548 } 549 #endif 550 flags |= SMALL; 551 if (field_width == -1) { 552 field_width = 2*sizeof(void *); 553 flags |= ZEROPAD; 554 } 555 return number(buf, end, (unsigned long)ptr, 16, field_width, 556 precision, flags); 557 } 558 559 static int vsnprintf_internal(char *buf, size_t size, const char *fmt, 560 va_list args) 561 { 562 u64 num; 563 int base; 564 char *str; 565 566 int flags; /* flags to number() */ 567 568 int field_width; /* width of output field */ 569 int precision; /* min. # of digits for integers; max 570 number of chars for from string */ 571 int qualifier; /* 'h', 'l', or 'L' for integer fields */ 572 /* 'z' support added 23/7/1999 S.H. */ 573 /* 'z' changed to 'Z' --davidm 1/25/99 */ 574 /* 't' added for ptrdiff_t */ 575 char *end = buf + size; 576 577 #ifdef CONFIG_SYS_VSNPRINTF 578 /* Make sure end is always >= buf - do we want this in U-Boot? */ 579 if (end < buf) { 580 end = ((void *)-1); 581 size = end - buf; 582 } 583 #endif 584 str = buf; 585 586 for (; *fmt ; ++fmt) { 587 if (*fmt != '%') { 588 ADDCH(str, *fmt); 589 continue; 590 } 591 592 /* process flags */ 593 flags = 0; 594 repeat: 595 ++fmt; /* this also skips first '%' */ 596 switch (*fmt) { 597 case '-': 598 flags |= LEFT; 599 goto repeat; 600 case '+': 601 flags |= PLUS; 602 goto repeat; 603 case ' ': 604 flags |= SPACE; 605 goto repeat; 606 case '#': 607 flags |= SPECIAL; 608 goto repeat; 609 case '0': 610 flags |= ZEROPAD; 611 goto repeat; 612 } 613 614 /* get field width */ 615 field_width = -1; 616 if (is_digit(*fmt)) 617 field_width = skip_atoi(&fmt); 618 else if (*fmt == '*') { 619 ++fmt; 620 /* it's the next argument */ 621 field_width = va_arg(args, int); 622 if (field_width < 0) { 623 field_width = -field_width; 624 flags |= LEFT; 625 } 626 } 627 628 /* get the precision */ 629 precision = -1; 630 if (*fmt == '.') { 631 ++fmt; 632 if (is_digit(*fmt)) 633 precision = skip_atoi(&fmt); 634 else if (*fmt == '*') { 635 ++fmt; 636 /* it's the next argument */ 637 precision = va_arg(args, int); 638 } 639 if (precision < 0) 640 precision = 0; 641 } 642 643 /* get the conversion qualifier */ 644 qualifier = -1; 645 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || 646 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { 647 qualifier = *fmt; 648 ++fmt; 649 if (qualifier == 'l' && *fmt == 'l') { 650 qualifier = 'L'; 651 ++fmt; 652 } 653 } 654 655 /* default base */ 656 base = 10; 657 658 switch (*fmt) { 659 case 'c': 660 if (!(flags & LEFT)) { 661 while (--field_width > 0) 662 ADDCH(str, ' '); 663 } 664 ADDCH(str, (unsigned char) va_arg(args, int)); 665 while (--field_width > 0) 666 ADDCH(str, ' '); 667 continue; 668 669 case 's': 670 str = string(str, end, va_arg(args, char *), 671 field_width, precision, flags); 672 continue; 673 674 case 'p': 675 str = pointer(fmt + 1, str, end, 676 va_arg(args, void *), 677 field_width, precision, flags); 678 /* Skip all alphanumeric pointer suffixes */ 679 while (isalnum(fmt[1])) 680 fmt++; 681 continue; 682 683 case 'n': 684 if (qualifier == 'l') { 685 long *ip = va_arg(args, long *); 686 *ip = (str - buf); 687 } else { 688 int *ip = va_arg(args, int *); 689 *ip = (str - buf); 690 } 691 continue; 692 693 case '%': 694 ADDCH(str, '%'); 695 continue; 696 697 /* integer number formats - set up the flags and "break" */ 698 case 'o': 699 base = 8; 700 break; 701 702 case 'x': 703 flags |= SMALL; 704 case 'X': 705 base = 16; 706 break; 707 708 case 'd': 709 case 'i': 710 flags |= SIGN; 711 case 'u': 712 break; 713 714 default: 715 ADDCH(str, '%'); 716 if (*fmt) 717 ADDCH(str, *fmt); 718 else 719 --fmt; 720 continue; 721 } 722 if (qualifier == 'L') /* "quad" for 64 bit variables */ 723 num = va_arg(args, unsigned long long); 724 else if (qualifier == 'l') { 725 num = va_arg(args, unsigned long); 726 if (flags & SIGN) 727 num = (signed long) num; 728 } else if (qualifier == 'Z' || qualifier == 'z') { 729 num = va_arg(args, size_t); 730 } else if (qualifier == 't') { 731 num = va_arg(args, ptrdiff_t); 732 } else if (qualifier == 'h') { 733 num = (unsigned short) va_arg(args, int); 734 if (flags & SIGN) 735 num = (signed short) num; 736 } else { 737 num = va_arg(args, unsigned int); 738 if (flags & SIGN) 739 num = (signed int) num; 740 } 741 str = number(str, end, num, base, field_width, precision, 742 flags); 743 } 744 745 #ifdef CONFIG_SYS_VSNPRINTF 746 if (size > 0) { 747 ADDCH(str, '\0'); 748 if (str > end) 749 end[-1] = '\0'; 750 --str; 751 } 752 #else 753 *str = '\0'; 754 #endif 755 /* the trailing null byte doesn't count towards the total */ 756 return str - buf; 757 } 758 759 #ifdef CONFIG_SYS_VSNPRINTF 760 int vsnprintf(char *buf, size_t size, const char *fmt, 761 va_list args) 762 { 763 return vsnprintf_internal(buf, size, fmt, args); 764 } 765 766 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 767 { 768 int i; 769 770 i = vsnprintf(buf, size, fmt, args); 771 772 if (likely(i < size)) 773 return i; 774 if (size != 0) 775 return size - 1; 776 return 0; 777 } 778 779 int snprintf(char *buf, size_t size, const char *fmt, ...) 780 { 781 va_list args; 782 int i; 783 784 va_start(args, fmt); 785 i = vsnprintf(buf, size, fmt, args); 786 va_end(args); 787 788 return i; 789 } 790 791 int scnprintf(char *buf, size_t size, const char *fmt, ...) 792 { 793 va_list args; 794 int i; 795 796 va_start(args, fmt); 797 i = vscnprintf(buf, size, fmt, args); 798 va_end(args); 799 800 return i; 801 } 802 #endif /* CONFIG_SYS_VSNPRINT */ 803 804 /** 805 * Format a string and place it in a buffer (va_list version) 806 * 807 * @param buf The buffer to place the result into 808 * @param fmt The format string to use 809 * @param args Arguments for the format string 810 * 811 * The function returns the number of characters written 812 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid 813 * buffer overflows. 814 * 815 * If you're not already dealing with a va_list consider using sprintf(). 816 */ 817 int vsprintf(char *buf, const char *fmt, va_list args) 818 { 819 return vsnprintf_internal(buf, INT_MAX, fmt, args); 820 } 821 822 int sprintf(char *buf, const char *fmt, ...) 823 { 824 va_list args; 825 int i; 826 827 va_start(args, fmt); 828 i = vsprintf(buf, fmt, args); 829 va_end(args); 830 return i; 831 } 832 833 void panic(const char *fmt, ...) 834 { 835 va_list args; 836 va_start(args, fmt); 837 vprintf(fmt, args); 838 putc('\n'); 839 va_end(args); 840 #if defined(CONFIG_PANIC_HANG) 841 hang(); 842 #else 843 udelay(100000); /* allow messages to go out */ 844 do_reset(NULL, 0, 0, NULL); 845 #endif 846 while (1) 847 ; 848 } 849 850 void __assert_fail(const char *assertion, const char *file, unsigned line, 851 const char *function) 852 { 853 /* This will not return */ 854 panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, 855 assertion); 856 } 857 858 char *simple_itoa(ulong i) 859 { 860 /* 21 digits plus null terminator, good for 64-bit or smaller ints */ 861 static char local[22]; 862 char *p = &local[21]; 863 864 *p-- = '\0'; 865 do { 866 *p-- = '0' + i % 10; 867 i /= 10; 868 } while (i > 0); 869 return p + 1; 870 } 871 872 /* We don't seem to have %'d in U-Boot */ 873 void print_grouped_ull(unsigned long long int_val, int digits) 874 { 875 char str[21], *s; 876 int grab = 3; 877 878 digits = (digits + 2) / 3; 879 sprintf(str, "%*llu", digits * 3, int_val); 880 for (s = str; *s; s += grab) { 881 if (s != str) 882 putc(s[-1] != ' ' ? ',' : ' '); 883 printf("%.*s", grab, s); 884 grab = 3; 885 } 886 } 887