lib/vsprintf.c

   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
  19 #include <common.h>
  20
  21 #include <div64.h>
  22 #define noinline __attribute__((noinline))
  23
  24 /* we use this so that we can do without the ctype library */
  25 #define is_digit(c)     ((c) >= '0' && (c) <= '9')
  26
  27 static int skip_atoi(const char **s)
  28 {
  29         int i = 0;
  30
  31         while (is_digit(**s))
  32                 i = i * 10 + *((*s)++) - '0';
  33
  34         return i;
  35 }
  36
  37 /* Decimal conversion is by far the most typical, and is used
  38  * for /proc and /sys data. This directly impacts e.g. top performance
  39  * with many processes running. We optimize it for speed
  40  * using code from
  41  * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
  42  * (with permission from the author, Douglas W. Jones). */
  43
  44 /* Formats correctly any integer in [0,99999].
  45  * Outputs from one to five digits depending on input.
  46  * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
  47 static char *put_dec_trunc(char *buf, unsigned q)
  48 {
  49         unsigned d3, d2, d1, d0;
  50         d1 = (q>>4) & 0xf;
  51         d2 = (q>>8) & 0xf;
  52         d3 = (q>>12);
  53
  54         d0 = 6*(d3 + d2 + d1) + (q & 0xf);
  55         q = (d0 * 0xcd) >> 11;
  56         d0 = d0 - 10*q;
  57         *buf++ = d0 + '0'; /* least significant digit */
  58         d1 = q + 9*d3 + 5*d2 + d1;
  59         if (d1 != 0) {
  60                 q = (d1 * 0xcd) >> 11;
  61                 d1 = d1 - 10*q;
  62                 *buf++ = d1 + '0'; /* next digit */
  63
  64                 d2 = q + 2*d2;
  65                 if ((d2 != 0) || (d3 != 0)) {
  66                         q = (d2 * 0xd) >> 7;
  67                         d2 = d2 - 10*q;
  68                         *buf++ = d2 + '0'; /* next digit */
  69
  70                         d3 = q + 4*d3;
  71                         if (d3 != 0) {
  72                                 q = (d3 * 0xcd) >> 11;
  73                                 d3 = d3 - 10*q;
  74                                 *buf++ = d3 + '0';  /* next digit */
  75                                 if (q != 0)
  76                                         *buf++ = q + '0'; /* most sign. digit */
  77                         }
  78                 }
  79         }
  80         return buf;
  81 }
  82 /* Same with if's removed. Always emits five digits */
  83 static char *put_dec_full(char *buf, unsigned q)
  84 {
  85         /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
  86         /* but anyway, gcc produces better code with full-sized ints */
  87         unsigned d3, d2, d1, d0;
  88         d1 = (q>>4) & 0xf;
  89         d2 = (q>>8) & 0xf;
  90         d3 = (q>>12);
  91
  92         /*
  93          * Possible ways to approx. divide by 10
  94          * gcc -O2 replaces multiply with shifts and adds
  95          * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
  96          * (x * 0x67) >> 10:  1100111
  97          * (x * 0x34) >> 9:    110100 - same
  98          * (x * 0x1a) >> 8:     11010 - same
  99          * (x * 0x0d) >> 7:      1101 - same, shortest code (on i386)
 100          */
 101
 102         d0 = 6*(d3 + d2 + d1) + (q & 0xf);
 103         q = (d0 * 0xcd) >> 11;
 104         d0 = d0 - 10*q;
 105         *buf++ = d0 + '0';
 106         d1 = q + 9*d3 + 5*d2 + d1;
 107                 q = (d1 * 0xcd) >> 11;
 108                 d1 = d1 - 10*q;
 109                 *buf++ = d1 + '0';
 110
 111                 d2 = q + 2*d2;
 112                         q = (d2 * 0xd) >> 7;
 113                         d2 = d2 - 10*q;
 114                         *buf++ = d2 + '0';
 115
 116                         d3 = q + 4*d3;
 117                                 q = (d3 * 0xcd) >> 11; /* - shorter code */
 118                                 /* q = (d3 * 0x67) >> 10; - would also work */
 119                                 d3 = d3 - 10*q;
 120                                 *buf++ = d3 + '0';
 121                                         *buf++ = q + '0';
 122         return buf;
 123 }
 124 /* No inlining helps gcc to use registers better */
 125 static noinline char *put_dec(char *buf, uint64_t num)
 126 {
 127         while (1) {
 128                 unsigned rem;
 129                 if (num < 100000)
 130                         return put_dec_trunc(buf, num);
 131                 rem = do_div(num, 100000);
 132                 buf = put_dec_full(buf, rem);
 133         }
 134 }
 135
 136 #define ZEROPAD 1               /* pad with zero */
 137 #define SIGN    2               /* unsigned/signed long */
 138 #define PLUS    4               /* show plus */
 139 #define SPACE   8               /* space if plus */
 140 #define LEFT    16              /* left justified */
 141 #define SMALL   32              /* Must be 32 == 0x20 */
 142 #define SPECIAL 64              /* 0x */
 143
 144 #ifdef CONFIG_SYS_VSNPRINTF
 145 /*
 146  * Macro to add a new character to our output string, but only if it will
 147  * fit. The macro moves to the next character position in the output string.
 148  */
 149 #define ADDCH(str, ch) do { \
 150         if ((str) < end) \
 151                 *(str) = (ch); \
 152         ++str; \
 153         } while (0)
 154 #else
 155 #define ADDCH(str, ch)  (*(str)++ = (ch))
 156 #endif
 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 #ifdef CONFIG_CMD_NET
 278 static const char hex_asc[] = "0123456789abcdef";
 279 #define hex_asc_lo(x)   hex_asc[((x) & 0x0f)]
 280 #define hex_asc_hi(x)   hex_asc[((x) & 0xf0) >> 4]
 281
 282 static inline char *pack_hex_byte(char *buf, u8 byte)
 283 {
 284         *buf++ = hex_asc_hi(byte);
 285         *buf++ = hex_asc_lo(byte);
 286         return buf;
 287 }
 288
 289 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
 290                                 int precision, int flags)
 291 {
 292         /* (6 * 2 hex digits), 5 colons and trailing zero */
 293         char mac_addr[6 * 3];
 294         char *p = mac_addr;
 295         int i;
 296
 297         for (i = 0; i < 6; i++) {
 298                 p = pack_hex_byte(p, addr[i]);
 299                 if (!(flags & SPECIAL) && i != 5)
 300                         *p++ = ':';
 301         }
 302         *p = '\0';
 303
 304         return string(buf, end, mac_addr, field_width, precision,
 305                       flags & ~SPECIAL);
 306 }
 307
 308 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
 309                          int precision, int flags)
 310 {
 311         /* (8 * 4 hex digits), 7 colons and trailing zero */
 312         char ip6_addr[8 * 5];
 313         char *p = ip6_addr;
 314         int i;
 315
 316         for (i = 0; i < 8; i++) {
 317                 p = pack_hex_byte(p, addr[2 * i]);
 318                 p = pack_hex_byte(p, addr[2 * i + 1]);
 319                 if (!(flags & SPECIAL) && i != 7)
 320                         *p++ = ':';
 321         }
 322         *p = '\0';
 323
 324         return string(buf, end, ip6_addr, field_width, precision,
 325                       flags & ~SPECIAL);
 326 }
 327
 328 static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
 329                          int precision, int flags)
 330 {
 331         /* (4 * 3 decimal digits), 3 dots and trailing zero */
 332         char ip4_addr[4 * 4];
 333         char temp[3];   /* hold each IP quad in reverse order */
 334         char *p = ip4_addr;
 335         int i, digits;
 336
 337         for (i = 0; i < 4; i++) {
 338                 digits = put_dec_trunc(temp, addr[i]) - temp;
 339                 /* reverse the digits in the quad */
 340                 while (digits--)
 341                         *p++ = temp[digits];
 342                 if (i != 3)
 343                         *p++ = '.';
 344         }
 345         *p = '\0';
 346
 347         return string(buf, end, ip4_addr, field_width, precision,
 348                       flags & ~SPECIAL);
 349 }
 350 #endif
 351
 352 /*
 353  * Show a '%p' thing.  A kernel extension is that the '%p' is followed
 354  * by an extra set of alphanumeric characters that are extended format
 355  * specifiers.
 356  *
 357  * Right now we handle:
 358  *
 359  * - 'M' For a 6-byte MAC address, it prints the address in the
 360  *       usual colon-separated hex notation
 361  * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
 362  *       decimal for v4 and colon separated network-order 16 bit hex for v6)
 363  * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
 364  *       currently the same
 365  *
 366  * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
 367  * function pointers are really function descriptors, which contain a
 368  * pointer to the real address.
 369  */
 370 static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 371                 int field_width, int precision, int flags)
 372 {
 373         u64 num = (uintptr_t)ptr;
 374
 375         /*
 376          * Being a boot loader, we explicitly allow pointers to
 377          * (physical) address null.
 378          */
 379 #if 0
 380         if (!ptr)
 381                 return string(buf, end, "(null)", field_width, precision,
 382                               flags);
 383 #endif
 384
 385 #ifdef CONFIG_CMD_NET
 386         switch (*fmt) {
 387         case 'a':
 388                 flags |= SPECIAL | ZEROPAD;
 389
 390                 switch (fmt[1]) {
 391                 case 'p':
 392                 default:
 393                         field_width = sizeof(phys_addr_t) * 2 + 2;
 394                         num = *(phys_addr_t *)ptr;
 395                         break;
 396                 }
 397                 break;
 398         case 'm':
 399                 flags |= SPECIAL;
 400                 /* Fallthrough */
 401         case 'M':
 402                 return mac_address_string(buf, end, ptr, field_width,
 403                                           precision, flags);
 404         case 'i':
 405                 flags |= SPECIAL;
 406                 /* Fallthrough */
 407         case 'I':
 408                 if (fmt[1] == '6')
 409                         return ip6_addr_string(buf, end, ptr, field_width,
 410                                                precision, flags);
 411                 if (fmt[1] == '4')
 412                         return ip4_addr_string(buf, end, ptr, field_width,
 413                                                precision, flags);
 414                 flags &= ~SPECIAL;
 415                 break;
 416         }
 417 #endif
 418         flags |= SMALL;
 419         if (field_width == -1) {
 420                 field_width = 2*sizeof(void *);
 421                 flags |= ZEROPAD;
 422         }
 423         return number(buf, end, num, 16, field_width, precision, flags);
 424 }
 425
 426 static int vsnprintf_internal(char *buf, size_t size, const char *fmt,
 427                               va_list args)
 428 {
 429         u64 num;
 430         int base;
 431         char *str;
 432
 433         int flags;              /* flags to number() */
 434
 435         int field_width;        /* width of output field */
 436         int precision;          /* min. # of digits for integers; max
 437                                    number of chars for from string */
 438         int qualifier;          /* 'h', 'l', or 'L' for integer fields */
 439                                 /* 'z' support added 23/7/1999 S.H.    */
 440                                 /* 'z' changed to 'Z' --davidm 1/25/99 */
 441                                 /* 't' added for ptrdiff_t */
 442         char *end = buf + size;
 443
 444 #ifdef CONFIG_SYS_VSNPRINTF
 445         /* Make sure end is always >= buf - do we want this in U-Boot? */
 446         if (end < buf) {
 447                 end = ((void *)-1);
 448                 size = end - buf;
 449         }
 450 #endif
 451         str = buf;
 452
 453         for (; *fmt ; ++fmt) {
 454                 if (*fmt != '%') {
 455                         ADDCH(str, *fmt);
 456                         continue;
 457                 }
 458
 459                 /* process flags */
 460                 flags = 0;
 461 repeat:
 462                         ++fmt;          /* this also skips first '%' */
 463                         switch (*fmt) {
 464                         case '-':
 465                                 flags |= LEFT;
 466                                 goto repeat;
 467                         case '+':
 468                                 flags |= PLUS;
 469                                 goto repeat;
 470                         case ' ':
 471                                 flags |= SPACE;
 472                                 goto repeat;
 473                         case '#':
 474                                 flags |= SPECIAL;
 475                                 goto repeat;
 476                         case '0':
 477                                 flags |= ZEROPAD;
 478                                 goto repeat;
 479                         }
 480
 481                 /* get field width */
 482                 field_width = -1;
 483                 if (is_digit(*fmt))
 484                         field_width = skip_atoi(&fmt);
 485                 else if (*fmt == '*') {
 486                         ++fmt;
 487                         /* it's the next argument */
 488                         field_width = va_arg(args, int);
 489                         if (field_width < 0) {
 490                                 field_width = -field_width;
 491                                 flags |= LEFT;
 492                         }
 493                 }
 494
 495                 /* get the precision */
 496                 precision = -1;
 497                 if (*fmt == '.') {
 498                         ++fmt;
 499                         if (is_digit(*fmt))
 500                                 precision = skip_atoi(&fmt);
 501                         else if (*fmt == '*') {
 502                                 ++fmt;
 503                                 /* it's the next argument */
 504                                 precision = va_arg(args, int);
 505                         }
 506                         if (precision < 0)
 507                                 precision = 0;
 508                 }
 509
 510                 /* get the conversion qualifier */
 511                 qualifier = -1;
 512                 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
 513                     *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
 514                         qualifier = *fmt;
 515                         ++fmt;
 516                         if (qualifier == 'l' && *fmt == 'l') {
 517                                 qualifier = 'L';
 518                                 ++fmt;
 519                         }
 520                 }
 521
 522                 /* default base */
 523                 base = 10;
 524
 525                 switch (*fmt) {
 526                 case 'c':
 527                         if (!(flags & LEFT)) {
 528                                 while (--field_width > 0)
 529                                         ADDCH(str, ' ');
 530                         }
 531                         ADDCH(str, (unsigned char) va_arg(args, int));
 532                         while (--field_width > 0)
 533                                 ADDCH(str, ' ');
 534                         continue;
 535
 536                 case 's':
 537                         str = string(str, end, va_arg(args, char *),
 538                                      field_width, precision, flags);
 539                         continue;
 540
 541                 case 'p':
 542                         str = pointer(fmt + 1, str, end,
 543                                         va_arg(args, void *),
 544                                         field_width, precision, flags);
 545                         /* Skip all alphanumeric pointer suffixes */
 546                         while (isalnum(fmt[1]))
 547                                 fmt++;
 548                         continue;
 549
 550                 case 'n':
 551                         if (qualifier == 'l') {
 552                                 long *ip = va_arg(args, long *);
 553                                 *ip = (str - buf);
 554                         } else {
 555                                 int *ip = va_arg(args, int *);
 556                                 *ip = (str - buf);
 557                         }
 558                         continue;
 559
 560                 case '%':
 561                         ADDCH(str, '%');
 562                         continue;
 563
 564                 /* integer number formats - set up the flags and "break" */
 565                 case 'o':
 566                         base = 8;
 567                         break;
 568
 569                 case 'x':
 570                         flags |= SMALL;
 571                 case 'X':
 572                         base = 16;
 573                         break;
 574
 575                 case 'd':
 576                 case 'i':
 577                         flags |= SIGN;
 578                 case 'u':
 579                         break;
 580
 581                 default:
 582                         ADDCH(str, '%');
 583                         if (*fmt)
 584                                 ADDCH(str, *fmt);
 585                         else
 586                                 --fmt;
 587                         continue;
 588                 }
 589                 if (qualifier == 'L')  /* "quad" for 64 bit variables */
 590                         num = va_arg(args, unsigned long long);
 591                 else if (qualifier == 'l') {
 592                         num = va_arg(args, unsigned long);
 593                         if (flags & SIGN)
 594                                 num = (signed long) num;
 595                 } else if (qualifier == 'Z' || qualifier == 'z') {
 596                         num = va_arg(args, size_t);
 597                 } else if (qualifier == 't') {
 598                         num = va_arg(args, ptrdiff_t);
 599                 } else if (qualifier == 'h') {
 600                         num = (unsigned short) va_arg(args, int);
 601                         if (flags & SIGN)
 602                                 num = (signed short) num;
 603                 } else {
 604                         num = va_arg(args, unsigned int);
 605                         if (flags & SIGN)
 606                                 num = (signed int) num;
 607                 }
 608                 str = number(str, end, num, base, field_width, precision,
 609                              flags);
 610         }
 611
 612 #ifdef CONFIG_SYS_VSNPRINTF
 613         if (size > 0) {
 614                 ADDCH(str, '\0');
 615                 if (str > end)
 616                         end[-1] = '\0';
 617                 --str;
 618         }
 619 #else
 620         *str = '\0';
 621 #endif
 622         /* the trailing null byte doesn't count towards the total */
 623         return str - buf;
 624 }
 625
 626 #ifdef CONFIG_SYS_VSNPRINTF
 627 int vsnprintf(char *buf, size_t size, const char *fmt,
 628                               va_list args)
 629 {
 630         return vsnprintf_internal(buf, size, fmt, args);
 631 }
 632
 633 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
 634 {
 635         int i;
 636
 637         i = vsnprintf(buf, size, fmt, args);
 638
 639         if (likely(i < size))
 640                 return i;
 641         if (size != 0)
 642                 return size - 1;
 643         return 0;
 644 }
 645
 646 int snprintf(char *buf, size_t size, const char *fmt, ...)
 647 {
 648         va_list args;
 649         int i;
 650
 651         va_start(args, fmt);
 652         i = vsnprintf(buf, size, fmt, args);
 653         va_end(args);
 654
 655         return i;
 656 }
 657
 658 int scnprintf(char *buf, size_t size, const char *fmt, ...)
 659 {
 660         va_list args;
 661         int i;
 662
 663         va_start(args, fmt);
 664         i = vscnprintf(buf, size, fmt, args);
 665         va_end(args);
 666
 667         return i;
 668 }
 669 #endif /* CONFIG_SYS_VSNPRINT */
 670
 671 /**
 672  * Format a string and place it in a buffer (va_list version)
 673  *
 674  * @param buf   The buffer to place the result into
 675  * @param fmt   The format string to use
 676  * @param args  Arguments for the format string
 677  *
 678  * The function returns the number of characters written
 679  * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
 680  * buffer overflows.
 681  *
 682  * If you're not already dealing with a va_list consider using sprintf().
 683  */
 684 int vsprintf(char *buf, const char *fmt, va_list args)
 685 {
 686         return vsnprintf_internal(buf, INT_MAX, fmt, args);
 687 }
 688
 689 int sprintf(char *buf, const char *fmt, ...)
 690 {
 691         va_list args;
 692         int i;
 693
 694         va_start(args, fmt);
 695         i = vsprintf(buf, fmt, args);
 696         va_end(args);
 697         return i;
 698 }
 699
 700 int printf(const char *fmt, ...)
 701 {
 702         va_list args;
 703         uint i;
 704         char printbuffer[CONFIG_SYS_PBSIZE];
 705
 706         va_start(args, fmt);
 707
 708         /*
 709          * For this to work, printbuffer must be larger than
 710          * anything we ever want to print.
 711          */
 712         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 713         va_end(args);
 714
 715         /* Print the string */
 716         puts(printbuffer);
 717         return i;
 718 }
 719
 720 int vprintf(const char *fmt, va_list args)
 721 {
 722         uint i;
 723         char printbuffer[CONFIG_SYS_PBSIZE];
 724
 725         /*
 726          * For this to work, printbuffer must be larger than
 727          * anything we ever want to print.
 728          */
 729         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 730
 731         /* Print the string */
 732         puts(printbuffer);
 733         return i;
 734 }
 735
 736
 737 void __assert_fail(const char *assertion, const char *file, unsigned line,
 738                    const char *function)
 739 {
 740         /* This will not return */
 741         panic("%s:%u: %s: Assertion `%s' failed.", file, line, function,
 742               assertion);
 743 }
 744
 745 char *simple_itoa(ulong i)
 746 {
 747         /* 21 digits plus null terminator, good for 64-bit or smaller ints */
 748         static char local[22];
 749         char *p = &local[21];
 750
 751         *p-- = '\0';
 752         do {
 753                 *p-- = '0' + i % 10;
 754                 i /= 10;
 755         } while (i > 0);
 756         return p + 1;
 757 }
 758
 759 /* We don't seem to have %'d in U-Boot */
 760 void print_grouped_ull(unsigned long long int_val, int digits)
 761 {
 762         char str[21], *s;
 763         int grab = 3;
 764
 765         digits = (digits + 2) / 3;
 766         sprintf(str, "%*llu", digits * 3, int_val);
 767         for (s = str; *s; s += grab) {
 768                 if (s != str)
 769                         putc(s[-1] != ' ' ? ',' : ' ');
 770                 printf("%.*s", grab, s);
 771                 grab = 3;
 772         }
 773 }
 774
 775 bool str2off(const char *p, loff_t *num)
 776 {
 777         char *endptr;
 778
 779         *num = simple_strtoull(p, &endptr, 16);
 780         return *p != '\0' && *endptr == '\0';
 781 }
 782
 783 bool str2long(const char *p, ulong *num)
 784 {
 785         char *endptr;
 786
 787         *num = simple_strtoul(p, &endptr, 16);
 788         return *p != '\0' && *endptr == '\0';
 789 }