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/ctype.h> 22 #include <linux/err.h> 23 #include <linux/types.h> 24 #include <linux/string.h> 25 26 #define noinline __attribute__((noinline)) 27 28 /* we use this so that we can do without the ctype library */ 29 #define is_digit(c) ((c) >= '0' && (c) <= '9') 30 31 static int skip_atoi(const char **s) 32 { 33 int i = 0; 34 35 while (is_digit(**s)) 36 i = i * 10 + *((*s)++) - '0'; 37 38 return i; 39 } 40 41 /* Decimal conversion is by far the most typical, and is used 42 * for /proc and /sys data. This directly impacts e.g. top performance 43 * with many processes running. We optimize it for speed 44 * using code from 45 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html 46 * (with permission from the author, Douglas W. Jones). */ 47 48 /* Formats correctly any integer in [0,99999]. 49 * Outputs from one to five digits depending on input. 50 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ 51 static char *put_dec_trunc(char *buf, unsigned q) 52 { 53 unsigned d3, d2, d1, d0; 54 d1 = (q>>4) & 0xf; 55 d2 = (q>>8) & 0xf; 56 d3 = (q>>12); 57 58 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 59 q = (d0 * 0xcd) >> 11; 60 d0 = d0 - 10*q; 61 *buf++ = d0 + '0'; /* least significant digit */ 62 d1 = q + 9*d3 + 5*d2 + d1; 63 if (d1 != 0) { 64 q = (d1 * 0xcd) >> 11; 65 d1 = d1 - 10*q; 66 *buf++ = d1 + '0'; /* next digit */ 67 68 d2 = q + 2*d2; 69 if ((d2 != 0) || (d3 != 0)) { 70 q = (d2 * 0xd) >> 7; 71 d2 = d2 - 10*q; 72 *buf++ = d2 + '0'; /* next digit */ 73 74 d3 = q + 4*d3; 75 if (d3 != 0) { 76 q = (d3 * 0xcd) >> 11; 77 d3 = d3 - 10*q; 78 *buf++ = d3 + '0'; /* next digit */ 79 if (q != 0) 80 *buf++ = q + '0'; /* most sign. digit */ 81 } 82 } 83 } 84 return buf; 85 } 86 /* Same with if's removed. Always emits five digits */ 87 static char *put_dec_full(char *buf, unsigned q) 88 { 89 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ 90 /* but anyway, gcc produces better code with full-sized ints */ 91 unsigned d3, d2, d1, d0; 92 d1 = (q>>4) & 0xf; 93 d2 = (q>>8) & 0xf; 94 d3 = (q>>12); 95 96 /* 97 * Possible ways to approx. divide by 10 98 * gcc -O2 replaces multiply with shifts and adds 99 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) 100 * (x * 0x67) >> 10: 1100111 101 * (x * 0x34) >> 9: 110100 - same 102 * (x * 0x1a) >> 8: 11010 - same 103 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) 104 */ 105 106 d0 = 6*(d3 + d2 + d1) + (q & 0xf); 107 q = (d0 * 0xcd) >> 11; 108 d0 = d0 - 10*q; 109 *buf++ = d0 + '0'; 110 d1 = q + 9*d3 + 5*d2 + d1; 111 q = (d1 * 0xcd) >> 11; 112 d1 = d1 - 10*q; 113 *buf++ = d1 + '0'; 114 115 d2 = q + 2*d2; 116 q = (d2 * 0xd) >> 7; 117 d2 = d2 - 10*q; 118 *buf++ = d2 + '0'; 119 120 d3 = q + 4*d3; 121 q = (d3 * 0xcd) >> 11; /* - shorter code */ 122 /* q = (d3 * 0x67) >> 10; - would also work */ 123 d3 = d3 - 10*q; 124 *buf++ = d3 + '0'; 125 *buf++ = q + '0'; 126 return buf; 127 } 128 /* No inlining helps gcc to use registers better */ 129 static noinline char *put_dec(char *buf, uint64_t num) 130 { 131 while (1) { 132 unsigned rem; 133 if (num < 100000) 134 return put_dec_trunc(buf, num); 135 rem = do_div(num, 100000); 136 buf = put_dec_full(buf, rem); 137 } 138 } 139 140 #define ZEROPAD 1 /* pad with zero */ 141 #define SIGN 2 /* unsigned/signed long */ 142 #define PLUS 4 /* show plus */ 143 #define SPACE 8 /* space if plus */ 144 #define LEFT 16 /* left justified */ 145 #define SMALL 32 /* Must be 32 == 0x20 */ 146 #define SPECIAL 64 /* 0x */ 147 148 /* 149 * Macro to add a new character to our output string, but only if it will 150 * fit. The macro moves to the next character position in the output string. 151 */ 152 #define ADDCH(str, ch) do { \ 153 if ((str) < end) \ 154 *(str) = (ch); \ 155 ++str; \ 156 } while (0) 157 158 static char *number(char *buf, char *end, u64 num, 159 int base, int size, int precision, int type) 160 { 161 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ 162 static const char digits[16] = "0123456789ABCDEF"; 163 164 char tmp[66]; 165 char sign; 166 char locase; 167 int need_pfx = ((type & SPECIAL) && base != 10); 168 int i; 169 170 /* locase = 0 or 0x20. ORing digits or letters with 'locase' 171 * produces same digits or (maybe lowercased) letters */ 172 locase = (type & SMALL); 173 if (type & LEFT) 174 type &= ~ZEROPAD; 175 sign = 0; 176 if (type & SIGN) { 177 if ((s64) num < 0) { 178 sign = '-'; 179 num = -(s64) num; 180 size--; 181 } else if (type & PLUS) { 182 sign = '+'; 183 size--; 184 } else if (type & SPACE) { 185 sign = ' '; 186 size--; 187 } 188 } 189 if (need_pfx) { 190 size--; 191 if (base == 16) 192 size--; 193 } 194 195 /* generate full string in tmp[], in reverse order */ 196 i = 0; 197 if (num == 0) 198 tmp[i++] = '0'; 199 /* Generic code, for any base: 200 else do { 201 tmp[i++] = (digits[do_div(num,base)] | locase); 202 } while (num != 0); 203 */ 204 else if (base != 10) { /* 8 or 16 */ 205 int mask = base - 1; 206 int shift = 3; 207 208 if (base == 16) 209 shift = 4; 210 211 do { 212 tmp[i++] = (digits[((unsigned char)num) & mask] 213 | locase); 214 num >>= shift; 215 } while (num); 216 } else { /* base 10 */ 217 i = put_dec(tmp, num) - tmp; 218 } 219 220 /* printing 100 using %2d gives "100", not "00" */ 221 if (i > precision) 222 precision = i; 223 /* leading space padding */ 224 size -= precision; 225 if (!(type & (ZEROPAD + LEFT))) { 226 while (--size >= 0) 227 ADDCH(buf, ' '); 228 } 229 /* sign */ 230 if (sign) 231 ADDCH(buf, sign); 232 /* "0x" / "0" prefix */ 233 if (need_pfx) { 234 ADDCH(buf, '0'); 235 if (base == 16) 236 ADDCH(buf, 'X' | locase); 237 } 238 /* zero or space padding */ 239 if (!(type & LEFT)) { 240 char c = (type & ZEROPAD) ? '0' : ' '; 241 242 while (--size >= 0) 243 ADDCH(buf, c); 244 } 245 /* hmm even more zero padding? */ 246 while (i <= --precision) 247 ADDCH(buf, '0'); 248 /* actual digits of result */ 249 while (--i >= 0) 250 ADDCH(buf, tmp[i]); 251 /* trailing space padding */ 252 while (--size >= 0) 253 ADDCH(buf, ' '); 254 return buf; 255 } 256 257 static char *string(char *buf, char *end, char *s, int field_width, 258 int precision, int flags) 259 { 260 int len, i; 261 262 if (s == NULL) 263 s = "<NULL>"; 264 265 len = strnlen(s, precision); 266 267 if (!(flags & LEFT)) 268 while (len < field_width--) 269 ADDCH(buf, ' '); 270 for (i = 0; i < len; ++i) 271 ADDCH(buf, *s++); 272 while (len < field_width--) 273 ADDCH(buf, ' '); 274 return buf; 275 } 276 277 /* U-Boot uses UTF-16 strings in the EFI context only. */ 278 #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) 279 static char *string16(char *buf, char *end, u16 *s, int field_width, 280 int precision, int flags) 281 { 282 const u16 *str = s ? s : L"<NULL>"; 283 ssize_t i, len = utf16_strnlen(str, precision); 284 285 if (!(flags & LEFT)) 286 for (; len < field_width; --field_width) 287 ADDCH(buf, ' '); 288 for (i = 0; i < len && buf + utf16_utf8_strnlen(str, 1) <= end; ++i) { 289 s32 s = utf16_get(&str); 290 291 utf8_put(s, &buf); 292 } 293 for (; len < field_width; --field_width) 294 ADDCH(buf, ' '); 295 return buf; 296 } 297 298 static char *device_path_string(char *buf, char *end, void *dp, int field_width, 299 int precision, int flags) 300 { 301 u16 *str; 302 303 /* If dp == NULL output the string '<NULL>' */ 304 if (!dp) 305 return string16(buf, end, dp, field_width, precision, flags); 306 307 str = efi_dp_str((struct efi_device_path *)dp); 308 if (!str) 309 return ERR_PTR(-ENOMEM); 310 311 buf = string16(buf, end, str, field_width, precision, flags); 312 efi_free_pool(str); 313 return buf; 314 } 315 #endif 316 317 #ifdef CONFIG_CMD_NET 318 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, 319 int precision, int flags) 320 { 321 /* (6 * 2 hex digits), 5 colons and trailing zero */ 322 char mac_addr[6 * 3]; 323 char *p = mac_addr; 324 int i; 325 326 for (i = 0; i < 6; i++) { 327 p = hex_byte_pack(p, addr[i]); 328 if (!(flags & SPECIAL) && i != 5) 329 *p++ = ':'; 330 } 331 *p = '\0'; 332 333 return string(buf, end, mac_addr, field_width, precision, 334 flags & ~SPECIAL); 335 } 336 337 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, 338 int precision, int flags) 339 { 340 /* (8 * 4 hex digits), 7 colons and trailing zero */ 341 char ip6_addr[8 * 5]; 342 char *p = ip6_addr; 343 int i; 344 345 for (i = 0; i < 8; i++) { 346 p = hex_byte_pack(p, addr[2 * i]); 347 p = hex_byte_pack(p, addr[2 * i + 1]); 348 if (!(flags & SPECIAL) && i != 7) 349 *p++ = ':'; 350 } 351 *p = '\0'; 352 353 return string(buf, end, ip6_addr, field_width, precision, 354 flags & ~SPECIAL); 355 } 356 357 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, 358 int precision, int flags) 359 { 360 /* (4 * 3 decimal digits), 3 dots and trailing zero */ 361 char ip4_addr[4 * 4]; 362 char temp[3]; /* hold each IP quad in reverse order */ 363 char *p = ip4_addr; 364 int i, digits; 365 366 for (i = 0; i < 4; i++) { 367 digits = put_dec_trunc(temp, addr[i]) - temp; 368 /* reverse the digits in the quad */ 369 while (digits--) 370 *p++ = temp[digits]; 371 if (i != 3) 372 *p++ = '.'; 373 } 374 *p = '\0'; 375 376 return string(buf, end, ip4_addr, field_width, precision, 377 flags & ~SPECIAL); 378 } 379 #endif 380 381 #ifdef CONFIG_LIB_UUID 382 /* 383 * This works (roughly) the same way as linux's, but we currently always 384 * print lower-case (ie. we just keep %pUB and %pUL for compat with linux), 385 * mostly just because that is what uuid_bin_to_str() supports. 386 * 387 * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 388 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 389 */ 390 static char *uuid_string(char *buf, char *end, u8 *addr, int field_width, 391 int precision, int flags, const char *fmt) 392 { 393 char uuid[UUID_STR_LEN + 1]; 394 int str_format = UUID_STR_FORMAT_STD; 395 396 switch (*(++fmt)) { 397 case 'L': 398 case 'l': 399 str_format = UUID_STR_FORMAT_GUID; 400 break; 401 case 'B': 402 case 'b': 403 /* this is the default */ 404 break; 405 default: 406 break; 407 } 408 409 if (addr) 410 uuid_bin_to_str(addr, uuid, str_format); 411 else 412 strcpy(uuid, "<NULL>"); 413 414 return string(buf, end, uuid, field_width, precision, flags); 415 } 416 #endif 417 418 /* 419 * Show a '%p' thing. A kernel extension is that the '%p' is followed 420 * by an extra set of alphanumeric characters that are extended format 421 * specifiers. 422 * 423 * Right now we handle: 424 * 425 * - 'M' For a 6-byte MAC address, it prints the address in the 426 * usual colon-separated hex notation 427 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated 428 * decimal for v4 and colon separated network-order 16 bit hex for v6) 429 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is 430 * currently the same 431 * 432 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 433 * function pointers are really function descriptors, which contain a 434 * pointer to the real address. 435 */ 436 static char *pointer(const char *fmt, char *buf, char *end, void *ptr, 437 int field_width, int precision, int flags) 438 { 439 u64 num = (uintptr_t)ptr; 440 441 /* 442 * Being a boot loader, we explicitly allow pointers to 443 * (physical) address null. 444 */ 445 #if 0 446 if (!ptr) 447 return string(buf, end, "(null)", field_width, precision, 448 flags); 449 #endif 450 451 switch (*fmt) { 452 /* Device paths only exist in the EFI context. */ 453 #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) 454 case 'D': 455 return device_path_string(buf, end, ptr, field_width, 456 precision, flags); 457 #endif 458 #ifdef CONFIG_CMD_NET 459 case 'a': 460 flags |= SPECIAL | ZEROPAD; 461 462 switch (fmt[1]) { 463 case 'p': 464 default: 465 field_width = sizeof(phys_addr_t) * 2 + 2; 466 num = *(phys_addr_t *)ptr; 467 break; 468 } 469 break; 470 case 'm': 471 flags |= SPECIAL; 472 /* Fallthrough */ 473 case 'M': 474 return mac_address_string(buf, end, ptr, field_width, 475 precision, flags); 476 case 'i': 477 flags |= SPECIAL; 478 /* Fallthrough */ 479 case 'I': 480 if (fmt[1] == '6') 481 return ip6_addr_string(buf, end, ptr, field_width, 482 precision, flags); 483 if (fmt[1] == '4') 484 return ip4_addr_string(buf, end, ptr, field_width, 485 precision, flags); 486 flags &= ~SPECIAL; 487 break; 488 #endif 489 #ifdef CONFIG_LIB_UUID 490 case 'U': 491 return uuid_string(buf, end, ptr, field_width, precision, 492 flags, fmt); 493 #endif 494 default: 495 break; 496 } 497 flags |= SMALL; 498 if (field_width == -1) { 499 field_width = 2*sizeof(void *); 500 flags |= ZEROPAD; 501 } 502 return number(buf, end, num, 16, field_width, precision, flags); 503 } 504 505 static int vsnprintf_internal(char *buf, size_t size, const char *fmt, 506 va_list args) 507 { 508 u64 num; 509 int base; 510 char *str; 511 512 int flags; /* flags to number() */ 513 514 int field_width; /* width of output field */ 515 int precision; /* min. # of digits for integers; max 516 number of chars for from string */ 517 int qualifier; /* 'h', 'l', or 'L' for integer fields */ 518 /* 'z' support added 23/7/1999 S.H. */ 519 /* 'z' changed to 'Z' --davidm 1/25/99 */ 520 /* 't' added for ptrdiff_t */ 521 char *end = buf + size; 522 523 /* Make sure end is always >= buf - do we want this in U-Boot? */ 524 if (end < buf) { 525 end = ((void *)-1); 526 size = end - buf; 527 } 528 str = buf; 529 530 for (; *fmt ; ++fmt) { 531 if (*fmt != '%') { 532 ADDCH(str, *fmt); 533 continue; 534 } 535 536 /* process flags */ 537 flags = 0; 538 repeat: 539 ++fmt; /* this also skips first '%' */ 540 switch (*fmt) { 541 case '-': 542 flags |= LEFT; 543 goto repeat; 544 case '+': 545 flags |= PLUS; 546 goto repeat; 547 case ' ': 548 flags |= SPACE; 549 goto repeat; 550 case '#': 551 flags |= SPECIAL; 552 goto repeat; 553 case '0': 554 flags |= ZEROPAD; 555 goto repeat; 556 } 557 558 /* get field width */ 559 field_width = -1; 560 if (is_digit(*fmt)) 561 field_width = skip_atoi(&fmt); 562 else if (*fmt == '*') { 563 ++fmt; 564 /* it's the next argument */ 565 field_width = va_arg(args, int); 566 if (field_width < 0) { 567 field_width = -field_width; 568 flags |= LEFT; 569 } 570 } 571 572 /* get the precision */ 573 precision = -1; 574 if (*fmt == '.') { 575 ++fmt; 576 if (is_digit(*fmt)) 577 precision = skip_atoi(&fmt); 578 else if (*fmt == '*') { 579 ++fmt; 580 /* it's the next argument */ 581 precision = va_arg(args, int); 582 } 583 if (precision < 0) 584 precision = 0; 585 } 586 587 /* get the conversion qualifier */ 588 qualifier = -1; 589 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || 590 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { 591 qualifier = *fmt; 592 ++fmt; 593 if (qualifier == 'l' && *fmt == 'l') { 594 qualifier = 'L'; 595 ++fmt; 596 } 597 } 598 599 /* default base */ 600 base = 10; 601 602 switch (*fmt) { 603 case 'c': 604 if (!(flags & LEFT)) { 605 while (--field_width > 0) 606 ADDCH(str, ' '); 607 } 608 ADDCH(str, (unsigned char) va_arg(args, int)); 609 while (--field_width > 0) 610 ADDCH(str, ' '); 611 continue; 612 613 case 's': 614 /* U-Boot uses UTF-16 strings in the EFI context only. */ 615 #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) 616 if (qualifier == 'l') { 617 str = string16(str, end, va_arg(args, u16 *), 618 field_width, precision, flags); 619 } else 620 #endif 621 { 622 str = string(str, end, va_arg(args, char *), 623 field_width, precision, flags); 624 } 625 continue; 626 627 case 'p': 628 str = pointer(fmt + 1, str, end, 629 va_arg(args, void *), 630 field_width, precision, flags); 631 if (IS_ERR(str)) 632 return PTR_ERR(str); 633 /* Skip all alphanumeric pointer suffixes */ 634 while (isalnum(fmt[1])) 635 fmt++; 636 continue; 637 638 case 'n': 639 if (qualifier == 'l') { 640 long *ip = va_arg(args, long *); 641 *ip = (str - buf); 642 } else { 643 int *ip = va_arg(args, int *); 644 *ip = (str - buf); 645 } 646 continue; 647 648 case '%': 649 ADDCH(str, '%'); 650 continue; 651 652 /* integer number formats - set up the flags and "break" */ 653 case 'o': 654 base = 8; 655 break; 656 657 case 'x': 658 flags |= SMALL; 659 case 'X': 660 base = 16; 661 break; 662 663 case 'd': 664 case 'i': 665 flags |= SIGN; 666 case 'u': 667 break; 668 669 default: 670 ADDCH(str, '%'); 671 if (*fmt) 672 ADDCH(str, *fmt); 673 else 674 --fmt; 675 continue; 676 } 677 if (qualifier == 'L') /* "quad" for 64 bit variables */ 678 num = va_arg(args, unsigned long long); 679 else if (qualifier == 'l') { 680 num = va_arg(args, unsigned long); 681 if (flags & SIGN) 682 num = (signed long) num; 683 } else if (qualifier == 'Z' || qualifier == 'z') { 684 num = va_arg(args, size_t); 685 } else if (qualifier == 't') { 686 num = va_arg(args, ptrdiff_t); 687 } else if (qualifier == 'h') { 688 num = (unsigned short) va_arg(args, int); 689 if (flags & SIGN) 690 num = (signed short) num; 691 } else { 692 num = va_arg(args, unsigned int); 693 if (flags & SIGN) 694 num = (signed int) num; 695 } 696 str = number(str, end, num, base, field_width, precision, 697 flags); 698 } 699 700 if (size > 0) { 701 ADDCH(str, '\0'); 702 if (str > end) 703 end[-1] = '\0'; 704 --str; 705 } 706 /* the trailing null byte doesn't count towards the total */ 707 return str - buf; 708 } 709 710 int vsnprintf(char *buf, size_t size, const char *fmt, 711 va_list args) 712 { 713 return vsnprintf_internal(buf, size, fmt, args); 714 } 715 716 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 717 { 718 int i; 719 720 i = vsnprintf(buf, size, fmt, args); 721 722 if (likely(i < size)) 723 return i; 724 if (size != 0) 725 return size - 1; 726 return 0; 727 } 728 729 int snprintf(char *buf, size_t size, const char *fmt, ...) 730 { 731 va_list args; 732 int i; 733 734 va_start(args, fmt); 735 i = vsnprintf(buf, size, fmt, args); 736 va_end(args); 737 738 return i; 739 } 740 741 int scnprintf(char *buf, size_t size, const char *fmt, ...) 742 { 743 va_list args; 744 int i; 745 746 va_start(args, fmt); 747 i = vscnprintf(buf, size, fmt, args); 748 va_end(args); 749 750 return i; 751 } 752 753 /** 754 * Format a string and place it in a buffer (va_list version) 755 * 756 * @param buf The buffer to place the result into 757 * @param fmt The format string to use 758 * @param args Arguments for the format string 759 * 760 * The function returns the number of characters written 761 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid 762 * buffer overflows. 763 * 764 * If you're not already dealing with a va_list consider using sprintf(). 765 */ 766 int vsprintf(char *buf, const char *fmt, va_list args) 767 { 768 return vsnprintf_internal(buf, INT_MAX, fmt, args); 769 } 770 771 int sprintf(char *buf, const char *fmt, ...) 772 { 773 va_list args; 774 int i; 775 776 va_start(args, fmt); 777 i = vsprintf(buf, fmt, args); 778 va_end(args); 779 return i; 780 } 781 782 #if CONFIG_IS_ENABLED(PRINTF) 783 int printf(const char *fmt, ...) 784 { 785 va_list args; 786 uint i; 787 char printbuffer[CONFIG_SYS_PBSIZE]; 788 789 va_start(args, fmt); 790 791 /* 792 * For this to work, printbuffer must be larger than 793 * anything we ever want to print. 794 */ 795 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 796 va_end(args); 797 798 /* Handle error */ 799 if (i <= 0) 800 return i; 801 /* Print the string */ 802 puts(printbuffer); 803 return i; 804 } 805 806 int vprintf(const char *fmt, va_list args) 807 { 808 uint i; 809 char printbuffer[CONFIG_SYS_PBSIZE]; 810 811 /* 812 * For this to work, printbuffer must be larger than 813 * anything we ever want to print. 814 */ 815 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 816 817 /* Handle error */ 818 if (i <= 0) 819 return i; 820 /* Print the string */ 821 puts(printbuffer); 822 return i; 823 } 824 #endif 825 826 char *simple_itoa(ulong i) 827 { 828 /* 21 digits plus null terminator, good for 64-bit or smaller ints */ 829 static char local[22]; 830 char *p = &local[21]; 831 832 *p-- = '\0'; 833 do { 834 *p-- = '0' + i % 10; 835 i /= 10; 836 } while (i > 0); 837 return p + 1; 838 } 839 840 /* We don't seem to have %'d in U-Boot */ 841 void print_grouped_ull(unsigned long long int_val, int digits) 842 { 843 char str[21], *s; 844 int grab = 3; 845 846 digits = (digits + 2) / 3; 847 sprintf(str, "%*llu", digits * 3, int_val); 848 for (s = str; *s; s += grab) { 849 if (s != str) 850 putc(s[-1] != ' ' ? ',' : ' '); 851 printf("%.*s", grab, s); 852 grab = 3; 853 } 854 } 855 856 bool str2off(const char *p, loff_t *num) 857 { 858 char *endptr; 859 860 *num = simple_strtoull(p, &endptr, 16); 861 return *p != '\0' && *endptr == '\0'; 862 } 863 864 bool str2long(const char *p, ulong *num) 865 { 866 char *endptr; 867 868 *num = simple_strtoul(p, &endptr, 16); 869 return *p != '\0' && *endptr == '\0'; 870 } 871