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 u16 *str = s ? s : L"<NULL>"; 283 ssize_t len = utf16_strnlen(str, precision); 284 285 if (!(flags & LEFT)) 286 for (; len < field_width; --field_width) 287 ADDCH(buf, ' '); 288 utf16_utf8_strncpy(&buf, str, len); 289 for (; len < field_width; --field_width) 290 ADDCH(buf, ' '); 291 return buf; 292 } 293 294 static char *device_path_string(char *buf, char *end, void *dp, int field_width, 295 int precision, int flags) 296 { 297 u16 *str; 298 299 /* If dp == NULL output the string '<NULL>' */ 300 if (!dp) 301 return string16(buf, end, dp, field_width, precision, flags); 302 303 str = efi_dp_str((struct efi_device_path *)dp); 304 if (!str) 305 return ERR_PTR(-ENOMEM); 306 307 buf = string16(buf, end, str, field_width, precision, flags); 308 efi_free_pool(str); 309 return buf; 310 } 311 #endif 312 313 #ifdef CONFIG_CMD_NET 314 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, 315 int precision, int flags) 316 { 317 /* (6 * 2 hex digits), 5 colons and trailing zero */ 318 char mac_addr[6 * 3]; 319 char *p = mac_addr; 320 int i; 321 322 for (i = 0; i < 6; i++) { 323 p = hex_byte_pack(p, addr[i]); 324 if (!(flags & SPECIAL) && i != 5) 325 *p++ = ':'; 326 } 327 *p = '\0'; 328 329 return string(buf, end, mac_addr, field_width, precision, 330 flags & ~SPECIAL); 331 } 332 333 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, 334 int precision, int flags) 335 { 336 /* (8 * 4 hex digits), 7 colons and trailing zero */ 337 char ip6_addr[8 * 5]; 338 char *p = ip6_addr; 339 int i; 340 341 for (i = 0; i < 8; i++) { 342 p = hex_byte_pack(p, addr[2 * i]); 343 p = hex_byte_pack(p, addr[2 * i + 1]); 344 if (!(flags & SPECIAL) && i != 7) 345 *p++ = ':'; 346 } 347 *p = '\0'; 348 349 return string(buf, end, ip6_addr, field_width, precision, 350 flags & ~SPECIAL); 351 } 352 353 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, 354 int precision, int flags) 355 { 356 /* (4 * 3 decimal digits), 3 dots and trailing zero */ 357 char ip4_addr[4 * 4]; 358 char temp[3]; /* hold each IP quad in reverse order */ 359 char *p = ip4_addr; 360 int i, digits; 361 362 for (i = 0; i < 4; i++) { 363 digits = put_dec_trunc(temp, addr[i]) - temp; 364 /* reverse the digits in the quad */ 365 while (digits--) 366 *p++ = temp[digits]; 367 if (i != 3) 368 *p++ = '.'; 369 } 370 *p = '\0'; 371 372 return string(buf, end, ip4_addr, field_width, precision, 373 flags & ~SPECIAL); 374 } 375 #endif 376 377 #ifdef CONFIG_LIB_UUID 378 /* 379 * This works (roughly) the same way as linux's, but we currently always 380 * print lower-case (ie. we just keep %pUB and %pUL for compat with linux), 381 * mostly just because that is what uuid_bin_to_str() supports. 382 * 383 * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 384 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 385 */ 386 static char *uuid_string(char *buf, char *end, u8 *addr, int field_width, 387 int precision, int flags, const char *fmt) 388 { 389 char uuid[UUID_STR_LEN + 1]; 390 int str_format = UUID_STR_FORMAT_STD; 391 392 switch (*(++fmt)) { 393 case 'L': 394 case 'l': 395 str_format = UUID_STR_FORMAT_GUID; 396 break; 397 case 'B': 398 case 'b': 399 /* this is the default */ 400 break; 401 default: 402 break; 403 } 404 405 if (addr) 406 uuid_bin_to_str(addr, uuid, str_format); 407 else 408 strcpy(uuid, "<NULL>"); 409 410 return string(buf, end, uuid, field_width, precision, flags); 411 } 412 #endif 413 414 /* 415 * Show a '%p' thing. A kernel extension is that the '%p' is followed 416 * by an extra set of alphanumeric characters that are extended format 417 * specifiers. 418 * 419 * Right now we handle: 420 * 421 * - 'M' For a 6-byte MAC address, it prints the address in the 422 * usual colon-separated hex notation 423 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated 424 * decimal for v4 and colon separated network-order 16 bit hex for v6) 425 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is 426 * currently the same 427 * 428 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 429 * function pointers are really function descriptors, which contain a 430 * pointer to the real address. 431 */ 432 static char *pointer(const char *fmt, char *buf, char *end, void *ptr, 433 int field_width, int precision, int flags) 434 { 435 u64 num = (uintptr_t)ptr; 436 437 /* 438 * Being a boot loader, we explicitly allow pointers to 439 * (physical) address null. 440 */ 441 #if 0 442 if (!ptr) 443 return string(buf, end, "(null)", field_width, precision, 444 flags); 445 #endif 446 447 switch (*fmt) { 448 /* Device paths only exist in the EFI context. */ 449 #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) 450 case 'D': 451 return device_path_string(buf, end, ptr, field_width, 452 precision, flags); 453 #endif 454 #ifdef CONFIG_CMD_NET 455 case 'a': 456 flags |= SPECIAL | ZEROPAD; 457 458 switch (fmt[1]) { 459 case 'p': 460 default: 461 field_width = sizeof(phys_addr_t) * 2 + 2; 462 num = *(phys_addr_t *)ptr; 463 break; 464 } 465 break; 466 case 'm': 467 flags |= SPECIAL; 468 /* Fallthrough */ 469 case 'M': 470 return mac_address_string(buf, end, ptr, field_width, 471 precision, flags); 472 case 'i': 473 flags |= SPECIAL; 474 /* Fallthrough */ 475 case 'I': 476 if (fmt[1] == '6') 477 return ip6_addr_string(buf, end, ptr, field_width, 478 precision, flags); 479 if (fmt[1] == '4') 480 return ip4_addr_string(buf, end, ptr, field_width, 481 precision, flags); 482 flags &= ~SPECIAL; 483 break; 484 #endif 485 #ifdef CONFIG_LIB_UUID 486 case 'U': 487 return uuid_string(buf, end, ptr, field_width, precision, 488 flags, fmt); 489 #endif 490 default: 491 break; 492 } 493 flags |= SMALL; 494 if (field_width == -1) { 495 field_width = 2*sizeof(void *); 496 flags |= ZEROPAD; 497 } 498 return number(buf, end, num, 16, field_width, precision, flags); 499 } 500 501 static int vsnprintf_internal(char *buf, size_t size, const char *fmt, 502 va_list args) 503 { 504 u64 num; 505 int base; 506 char *str; 507 508 int flags; /* flags to number() */ 509 510 int field_width; /* width of output field */ 511 int precision; /* min. # of digits for integers; max 512 number of chars for from string */ 513 int qualifier; /* 'h', 'l', or 'L' for integer fields */ 514 /* 'z' support added 23/7/1999 S.H. */ 515 /* 'z' changed to 'Z' --davidm 1/25/99 */ 516 /* 't' added for ptrdiff_t */ 517 char *end = buf + size; 518 519 /* Make sure end is always >= buf - do we want this in U-Boot? */ 520 if (end < buf) { 521 end = ((void *)-1); 522 size = end - buf; 523 } 524 str = buf; 525 526 for (; *fmt ; ++fmt) { 527 if (*fmt != '%') { 528 ADDCH(str, *fmt); 529 continue; 530 } 531 532 /* process flags */ 533 flags = 0; 534 repeat: 535 ++fmt; /* this also skips first '%' */ 536 switch (*fmt) { 537 case '-': 538 flags |= LEFT; 539 goto repeat; 540 case '+': 541 flags |= PLUS; 542 goto repeat; 543 case ' ': 544 flags |= SPACE; 545 goto repeat; 546 case '#': 547 flags |= SPECIAL; 548 goto repeat; 549 case '0': 550 flags |= ZEROPAD; 551 goto repeat; 552 } 553 554 /* get field width */ 555 field_width = -1; 556 if (is_digit(*fmt)) 557 field_width = skip_atoi(&fmt); 558 else if (*fmt == '*') { 559 ++fmt; 560 /* it's the next argument */ 561 field_width = va_arg(args, int); 562 if (field_width < 0) { 563 field_width = -field_width; 564 flags |= LEFT; 565 } 566 } 567 568 /* get the precision */ 569 precision = -1; 570 if (*fmt == '.') { 571 ++fmt; 572 if (is_digit(*fmt)) 573 precision = skip_atoi(&fmt); 574 else if (*fmt == '*') { 575 ++fmt; 576 /* it's the next argument */ 577 precision = va_arg(args, int); 578 } 579 if (precision < 0) 580 precision = 0; 581 } 582 583 /* get the conversion qualifier */ 584 qualifier = -1; 585 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || 586 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { 587 qualifier = *fmt; 588 ++fmt; 589 if (qualifier == 'l' && *fmt == 'l') { 590 qualifier = 'L'; 591 ++fmt; 592 } 593 } 594 595 /* default base */ 596 base = 10; 597 598 switch (*fmt) { 599 case 'c': 600 if (!(flags & LEFT)) { 601 while (--field_width > 0) 602 ADDCH(str, ' '); 603 } 604 ADDCH(str, (unsigned char) va_arg(args, int)); 605 while (--field_width > 0) 606 ADDCH(str, ' '); 607 continue; 608 609 case 's': 610 /* U-Boot uses UTF-16 strings in the EFI context only. */ 611 #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) 612 if (qualifier == 'l') { 613 str = string16(str, end, va_arg(args, u16 *), 614 field_width, precision, flags); 615 } else 616 #endif 617 { 618 str = string(str, end, va_arg(args, char *), 619 field_width, precision, flags); 620 } 621 continue; 622 623 case 'p': 624 str = pointer(fmt + 1, str, end, 625 va_arg(args, void *), 626 field_width, precision, flags); 627 if (IS_ERR(str)) 628 return PTR_ERR(str); 629 /* Skip all alphanumeric pointer suffixes */ 630 while (isalnum(fmt[1])) 631 fmt++; 632 continue; 633 634 case 'n': 635 if (qualifier == 'l') { 636 long *ip = va_arg(args, long *); 637 *ip = (str - buf); 638 } else { 639 int *ip = va_arg(args, int *); 640 *ip = (str - buf); 641 } 642 continue; 643 644 case '%': 645 ADDCH(str, '%'); 646 continue; 647 648 /* integer number formats - set up the flags and "break" */ 649 case 'o': 650 base = 8; 651 break; 652 653 case 'x': 654 flags |= SMALL; 655 case 'X': 656 base = 16; 657 break; 658 659 case 'd': 660 case 'i': 661 flags |= SIGN; 662 case 'u': 663 break; 664 665 default: 666 ADDCH(str, '%'); 667 if (*fmt) 668 ADDCH(str, *fmt); 669 else 670 --fmt; 671 continue; 672 } 673 if (qualifier == 'L') /* "quad" for 64 bit variables */ 674 num = va_arg(args, unsigned long long); 675 else if (qualifier == 'l') { 676 num = va_arg(args, unsigned long); 677 if (flags & SIGN) 678 num = (signed long) num; 679 } else if (qualifier == 'Z' || qualifier == 'z') { 680 num = va_arg(args, size_t); 681 } else if (qualifier == 't') { 682 num = va_arg(args, ptrdiff_t); 683 } else if (qualifier == 'h') { 684 num = (unsigned short) va_arg(args, int); 685 if (flags & SIGN) 686 num = (signed short) num; 687 } else { 688 num = va_arg(args, unsigned int); 689 if (flags & SIGN) 690 num = (signed int) num; 691 } 692 str = number(str, end, num, base, field_width, precision, 693 flags); 694 } 695 696 if (size > 0) { 697 ADDCH(str, '\0'); 698 if (str > end) 699 end[-1] = '\0'; 700 --str; 701 } 702 /* the trailing null byte doesn't count towards the total */ 703 return str - buf; 704 } 705 706 int vsnprintf(char *buf, size_t size, const char *fmt, 707 va_list args) 708 { 709 return vsnprintf_internal(buf, size, fmt, args); 710 } 711 712 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 713 { 714 int i; 715 716 i = vsnprintf(buf, size, fmt, args); 717 718 if (likely(i < size)) 719 return i; 720 if (size != 0) 721 return size - 1; 722 return 0; 723 } 724 725 int snprintf(char *buf, size_t size, const char *fmt, ...) 726 { 727 va_list args; 728 int i; 729 730 va_start(args, fmt); 731 i = vsnprintf(buf, size, fmt, args); 732 va_end(args); 733 734 return i; 735 } 736 737 int scnprintf(char *buf, size_t size, const char *fmt, ...) 738 { 739 va_list args; 740 int i; 741 742 va_start(args, fmt); 743 i = vscnprintf(buf, size, fmt, args); 744 va_end(args); 745 746 return i; 747 } 748 749 /** 750 * Format a string and place it in a buffer (va_list version) 751 * 752 * @param buf The buffer to place the result into 753 * @param fmt The format string to use 754 * @param args Arguments for the format string 755 * 756 * The function returns the number of characters written 757 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid 758 * buffer overflows. 759 * 760 * If you're not already dealing with a va_list consider using sprintf(). 761 */ 762 int vsprintf(char *buf, const char *fmt, va_list args) 763 { 764 return vsnprintf_internal(buf, INT_MAX, fmt, args); 765 } 766 767 int sprintf(char *buf, const char *fmt, ...) 768 { 769 va_list args; 770 int i; 771 772 va_start(args, fmt); 773 i = vsprintf(buf, fmt, args); 774 va_end(args); 775 return i; 776 } 777 778 #if CONFIG_IS_ENABLED(PRINTF) 779 int printf(const char *fmt, ...) 780 { 781 va_list args; 782 uint i; 783 char printbuffer[CONFIG_SYS_PBSIZE]; 784 785 va_start(args, fmt); 786 787 /* 788 * For this to work, printbuffer must be larger than 789 * anything we ever want to print. 790 */ 791 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 792 va_end(args); 793 794 /* Handle error */ 795 if (i <= 0) 796 return i; 797 /* Print the string */ 798 puts(printbuffer); 799 return i; 800 } 801 802 int vprintf(const char *fmt, va_list args) 803 { 804 uint i; 805 char printbuffer[CONFIG_SYS_PBSIZE]; 806 807 /* 808 * For this to work, printbuffer must be larger than 809 * anything we ever want to print. 810 */ 811 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 812 813 /* Handle error */ 814 if (i <= 0) 815 return i; 816 /* Print the string */ 817 puts(printbuffer); 818 return i; 819 } 820 #endif 821 822 char *simple_itoa(ulong i) 823 { 824 /* 21 digits plus null terminator, good for 64-bit or smaller ints */ 825 static char local[22]; 826 char *p = &local[21]; 827 828 *p-- = '\0'; 829 do { 830 *p-- = '0' + i % 10; 831 i /= 10; 832 } while (i > 0); 833 return p + 1; 834 } 835 836 /* We don't seem to have %'d in U-Boot */ 837 void print_grouped_ull(unsigned long long int_val, int digits) 838 { 839 char str[21], *s; 840 int grab = 3; 841 842 digits = (digits + 2) / 3; 843 sprintf(str, "%*llu", digits * 3, int_val); 844 for (s = str; *s; s += grab) { 845 if (s != str) 846 putc(s[-1] != ' ' ? ',' : ' '); 847 printf("%.*s", grab, s); 848 grab = 3; 849 } 850 } 851 852 bool str2off(const char *p, loff_t *num) 853 { 854 char *endptr; 855 856 *num = simple_strtoull(p, &endptr, 16); 857 return *p != '\0' && *endptr == '\0'; 858 } 859 860 bool str2long(const char *p, ulong *num) 861 { 862 char *endptr; 863 864 *num = simple_strtoul(p, &endptr, 16); 865 return *p != '\0' && *endptr == '\0'; 866 } 867