cvs.zerfleddert.de Git - proxmark3-svn/blob - armsrc/printf.c

   1 /*-
   2  * Copyright (c) 1986, 1988, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)subr_prf.c  8.3 (Berkeley) 1/21/94
  35  */
  36
  37 #include <stddef.h>
  38 #include <stdarg.h>
  39 #include "printf.h"
  40 #include "util.h"
  41
  42 typedef uint32_t uintmax_t;
  43 typedef int32_t intmax_t;
  44
  45 typedef unsigned char u_char;
  46 typedef unsigned int u_int;
  47 typedef unsigned long u_long;
  48 typedef unsigned short u_short;
  49 typedef unsigned long long u_quad_t;
  50 typedef long long quad_t;
  51
  52 typedef int ssize_t;
  53
  54 #define NBBY    8               /* number of bits in a byte */
  55
  56 char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz";
  57 #define hex2ascii(hex)  (hex2ascii_data[hex])
  58 #define toupper(c)      ((c) - 0x20 * (((c) >= 'a') && ((c) <= 'z')))
  59
  60 /* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */
  61 #define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
  62
  63 /*
  64  * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
  65  * order; return an optional length and a pointer to the last character
  66  * written in the buffer (i.e., the first character of the string).
  67  * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
  68  */
  69 static char *
  70 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
  71 {
  72         char *p, c;
  73
  74         p = nbuf;
  75         *p = '\0';
  76         do {
  77                 c = hex2ascii(num % base);
  78                 *++p = upper ? toupper(c) : c;
  79         } while (num /= base);
  80         if (lenp)
  81                 *lenp = p - nbuf;
  82         return (p);
  83 }
  84
  85 /*
  86  * Scaled down version of printf(3).
  87  *
  88  * Two additional formats:
  89  *
  90  * The format %b is supported to decode error registers.
  91  * Its usage is:
  92  *
  93  *      printf("reg=%b\n", regval, "*");
  94  *
  95  * where  is the output base expressed as a control character, e.g.
  96  * \10 gives octal; \20 gives hex.  Each arg is a sequence of characters,
  97  * the first of which gives the bit number to be inspected (origin 1), and
  98  * the next characters (up to a control character, i.e. a character <= 32),
  99  * give the name of the register.  Thus:
 100  *
 101  *      kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
 102  *
 103  * would produce output:
 104  *
 105  *      reg=3
 106  *
 107  * XXX:  %D  -- Hexdump, takes pointer and separator string:
 108  *              ("%6D", ptr, ":")   -> XX:XX:XX:XX:XX:XX
 109  *              ("%*D", len, ptr, " " -> XX XX XX XX ...
 110  */
 111 int
 112 kvsprintf(char const *fmt, void *arg, int radix, va_list ap)
 113 {
 114 #define PCHAR(c) {int cc=(c); *d++ = cc; retval++; }
 115         char nbuf[MAXNBUF];
 116         char *d;
 117         const char *p, *percent, *q;
 118         u_char *up;
 119         int ch, n;
 120         uintmax_t num;
 121         int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
 122         int cflag, hflag, jflag, tflag, zflag;
 123         int dwidth, upper;
 124         char padc;
 125         int stop = 0, retval = 0;
 126
 127         num = 0;
 128         d = (char *) arg;
 129
 130         if (fmt == NULL)
 131                 fmt = "(fmt null)\n";
 132
 133         if (radix < 2 || radix > 36)
 134                 radix = 10;
 135
 136         for (;;) {
 137                 padc = ' ';
 138                 width = 0;
 139                 while ((ch = (u_char)*fmt++) != '%' || stop) {
 140                         PCHAR(ch);
 141                         if (ch == '\0')
 142                                 return (retval);
 143                 }
 144                 percent = fmt - 1;
 145                 qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
 146                 sign = 0; dot = 0; dwidth = 0; upper = 0;
 147                 cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
 148 reswitch:       switch (ch = (u_char)*fmt++) {
 149                 case '.':
 150                         dot = 1;
 151                         goto reswitch;
 152                 case '#':
 153                         sharpflag = 1;
 154                         goto reswitch;
 155                 case '+':
 156                         sign = 1;
 157                         goto reswitch;
 158                 case '-':
 159                         ladjust = 1;
 160                         goto reswitch;
 161                 case '%':
 162                         PCHAR(ch);
 163                         break;
 164                 case '*':
 165                         if (!dot) {
 166                                 width = va_arg(ap, int);
 167                                 if (width < 0) {
 168                                         ladjust = !ladjust;
 169                                         width = -width;
 170                                 }
 171                         } else {
 172                                 dwidth = va_arg(ap, int);
 173                         }
 174                         goto reswitch;
 175                 case '0':
 176                         if (!dot) {
 177                                 padc = '0';
 178                                 goto reswitch;
 179                         }
 180                 case '1': case '2': case '3': case '4':
 181                 case '5': case '6': case '7': case '8': case '9':
 182                                 for (n = 0;; ++fmt) {
 183                                         n = n * 10 + ch - '0';
 184                                         ch = *fmt;
 185                                         if (ch < '0' || ch > '9')
 186                                                 break;
 187                                 }
 188                         if (dot)
 189                                 dwidth = n;
 190                         else
 191                                 width = n;
 192                         goto reswitch;
 193                 case 'b':
 194                         num = (u_int)va_arg(ap, int);
 195                         p = va_arg(ap, char *);
 196                         for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
 197                                 PCHAR(*q--);
 198
 199                         if (num == 0)
 200                                 break;
 201
 202                         for (tmp = 0; *p;) {
 203                                 n = *p++;
 204                                 if (num & (1 << (n - 1))) {
 205                                         PCHAR(tmp ? ',' : '<');
 206                                         for (; (n = *p) > ' '; ++p)
 207                                                 PCHAR(n);
 208                                         tmp = 1;
 209                                 } else
 210                                         for (; *p > ' '; ++p)
 211                                                 continue;
 212                         }
 213                         if (tmp)
 214                                 PCHAR('>');
 215                         break;
 216                 case 'c':
 217                         PCHAR(va_arg(ap, int));
 218                         break;
 219                 case 'D':
 220                         up = va_arg(ap, u_char *);
 221                         p = va_arg(ap, char *);
 222                         if (!width)
 223                                 width = 16;
 224                         while(width--) {
 225                                 PCHAR(hex2ascii(*up >> 4));
 226                                 PCHAR(hex2ascii(*up & 0x0f));
 227                                 up++;
 228                                 if (width)
 229                                         for (q=p;*q;q++)
 230                                                 PCHAR(*q);
 231                         }
 232                         break;
 233                 case 'd':
 234                 case 'i':
 235                         base = 10;
 236                         sign = 1;
 237                         goto handle_sign;
 238                 case 'h':
 239                         if (hflag) {
 240                                 hflag = 0;
 241                                 cflag = 1;
 242                         } else
 243                                 hflag = 1;
 244                         goto reswitch;
 245                 case 'j':
 246                         jflag = 1;
 247                         goto reswitch;
 248                 case 'l':
 249                         if (lflag) {
 250                                 lflag = 0;
 251                                 qflag = 1;
 252                         } else
 253                                 lflag = 1;
 254                         goto reswitch;
 255                 case 'n':
 256                         if (jflag)
 257                                 *(va_arg(ap, intmax_t *)) = retval;
 258                         else if (qflag)
 259                                 *(va_arg(ap, quad_t *)) = retval;
 260                         else if (lflag)
 261                                 *(va_arg(ap, long *)) = retval;
 262                         else if (zflag)
 263                                 *(va_arg(ap, size_t *)) = retval;
 264                         else if (hflag)
 265                                 *(va_arg(ap, short *)) = retval;
 266                         else if (cflag)
 267                                 *(va_arg(ap, char *)) = retval;
 268                         else
 269                                 *(va_arg(ap, int *)) = retval;
 270                         break;
 271                 case 'o':
 272                         base = 8;
 273                         goto handle_nosign;
 274                 case 'p':
 275                         base = 16;
 276                         sharpflag = (width == 0);
 277                         sign = 0;
 278                         num = (uintptr_t)va_arg(ap, void *);
 279                         goto number;
 280                 case 'q':
 281                         qflag = 1;
 282                         goto reswitch;
 283                 case 'r':
 284                         base = radix;
 285                         if (sign)
 286                                 goto handle_sign;
 287                         goto handle_nosign;
 288                 case 's':
 289                         p = va_arg(ap, char *);
 290                         if (p == NULL)
 291                                 p = "(null)";
 292                         if (!dot)
 293                                 n = strlen (p);
 294                         else
 295                                 for (n = 0; n < dwidth && p[n]; n++)
 296                                         continue;
 297
 298                         width -= n;
 299
 300                         if (!ladjust && width > 0)
 301                                 while (width--)
 302                                         PCHAR(padc);
 303                         while (n--)
 304                                 PCHAR(*p++);
 305                         if (ladjust && width > 0)
 306                                 while (width--)
 307                                         PCHAR(padc);
 308                         break;
 309                 case 't':
 310                         tflag = 1;
 311                         goto reswitch;
 312                 case 'u':
 313                         base = 10;
 314                         goto handle_nosign;
 315                 case 'X':
 316                         upper = 1;
 317                 case 'x':
 318                         base = 16;
 319                         goto handle_nosign;
 320                 case 'y':
 321                         base = 16;
 322                         sign = 1;
 323                         goto handle_sign;
 324                 case 'z':
 325                         zflag = 1;
 326                         goto reswitch;
 327 handle_nosign:
 328                         sign = 0;
 329                         if (jflag)
 330                                 num = va_arg(ap, uintmax_t);
 331                         else if (qflag)
 332                                 num = va_arg(ap, u_quad_t);
 333                         else if (tflag)
 334                                 num = va_arg(ap, ptrdiff_t);
 335                         else if (lflag)
 336                                 num = va_arg(ap, u_long);
 337                         else if (zflag)
 338                                 num = va_arg(ap, size_t);
 339                         else if (hflag)
 340                                 num = (u_short)va_arg(ap, int);
 341                         else if (cflag)
 342                                 num = (u_char)va_arg(ap, int);
 343                         else
 344                                 num = va_arg(ap, u_int);
 345                         goto number;
 346 handle_sign:
 347                         if (jflag)
 348                                 num = va_arg(ap, intmax_t);
 349                         else if (qflag)
 350                                 num = va_arg(ap, quad_t);
 351                         else if (tflag)
 352                                 num = va_arg(ap, ptrdiff_t);
 353                         else if (lflag)
 354                                 num = va_arg(ap, long);
 355                         else if (zflag)
 356                                 num = va_arg(ap, ssize_t);
 357                         else if (hflag)
 358                                 num = (short)va_arg(ap, int);
 359                         else if (cflag)
 360                                 num = (char)va_arg(ap, int);
 361                         else
 362                                 num = va_arg(ap, int);
 363 number:
 364                         if (sign && (intmax_t)num < 0) {
 365                                 neg = 1;
 366                                 num = -(intmax_t)num;
 367                         }
 368                         p = ksprintn(nbuf, num, base, &tmp, upper);
 369                         if (sharpflag && num != 0) {
 370                                 if (base == 8)
 371                                         tmp++;
 372                                 else if (base == 16)
 373                                         tmp += 2;
 374                         }
 375                         if (neg)
 376                                 tmp++;
 377
 378                         if (!ladjust && padc != '0' && width
 379                             && (width -= tmp) > 0)
 380                                 while (width--)
 381                                         PCHAR(padc);
 382                         if (neg)
 383                                 PCHAR('-');
 384                         if (sharpflag && num != 0) {
 385                                 if (base == 8) {
 386                                         PCHAR('0');
 387                                 } else if (base == 16) {
 388                                         PCHAR('0');
 389                                         PCHAR('x');
 390                                 }
 391                         }
 392                         if (!ladjust && width && (width -= tmp) > 0)
 393                                 while (width--)
 394                                         PCHAR(padc);
 395
 396                         while (*p)
 397                                 PCHAR(*p--);
 398
 399                         if (ladjust && width && (width -= tmp) > 0)
 400                                 while (width--)
 401                                         PCHAR(padc);
 402
 403                         break;
 404                 default:
 405                         while (percent < fmt)
 406                                 PCHAR(*percent++);
 407                         /*
 408                          * Since we ignore an formatting argument it is no
 409                          * longer safe to obey the remaining formatting
 410                          * arguments as the arguments will no longer match
 411                          * the format specs.
 412                          */
 413                         stop = 1;
 414                         break;
 415                 }
 416         }
 417         PCHAR(0);
 418         return retval;
 419 #undef PCHAR
 420 }
 421
 422 int vsprintf(char *dest, const char *fmt, va_list ap)
 423 {
 424         return kvsprintf(fmt, dest, 10, ap);
 425 }
 426
 427 int
 428 sprintf(char *dest, const char *fmt, ...)
 429 {
 430         /* http://www.pagetable.com/?p=298 */
 431         int retval;
 432         va_list ap;
 433
 434         va_start(ap, fmt);
 435         retval = kvsprintf(fmt, dest, 10, ap);
 436         va_end(ap);
 437         return retval;
 438 }