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 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. */ 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 */ 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 */ 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) 156 157 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 } 255 256 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 } 275 276 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 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 } 315 316 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 } 335 336 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 */ 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 */ 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 } 474 475 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 } 673 674 int vsnprintf(char *buf, size_t size, const char *fmt, 675 va_list args) 676 { 677 return vsnprintf_internal(buf, size, fmt, args); 678 } 679 680 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 } 692 693 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 } 704 705 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 */ 730 int vsprintf(char *buf, const char *fmt, va_list args) 731 { 732 return vsnprintf_internal(buf, INT_MAX, fmt, args); 733 } 734 735 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 } 745 746 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 } 765 766 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 } 781 782 783 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 } 790 791 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 */ 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 } 820 821 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 } 828 829 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