contrib/dhcp-3.0/omapip/iscprint.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001, 2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: iscprint.c,v 1.1.2.1 2004/09/21 20:33:13 dhankins Exp $ */
  19
  20 #include "dhcpd.h"
  21
  22 #ifdef NO_SNPRINTF
  23
  24 #ifndef LINT
  25 static char copyright[] =
  26 "$Id: iscprint.c,v 1.1.2.1 2004/09/21 20:33:13 dhankins Exp $ Copyright (c) 2004 Internet Systems Consortium, Inc.  All rights reserved.";
  27 #endif
  28
  29 #define INSIST(cond)    REQUIRE(cond)
  30 #define REQUIRE(cond)   if (!(cond)) { return 0; }
  31
  32 /*
  33  * Return length of string that would have been written if not truncated.
  34  */
  35
  36 int
  37 isc_print_snprintf(char *str, size_t size, const char *format, ...) {
  38         va_list ap;
  39         int ret;
  40
  41         va_start(ap, format);
  42         ret = vsnprintf(str, size, format, ap);
  43         va_end(ap);
  44         return (ret);
  45 }
  46
  47 /*
  48  * Return length of string that would have been written if not truncated.
  49  */
  50
  51 int
  52 isc_print_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
  53         int h;
  54         int l;
  55         int q;
  56         int alt;
  57         int zero;
  58         int left;
  59         int plus;
  60         int space;
  61         int neg;
  62         isc_int64_t tmpi;
  63         isc_uint64_t tmpui;
  64         unsigned long width;
  65         unsigned long precision;
  66         unsigned int length;
  67         char buf[1024];
  68         char c;
  69         void *v;
  70         char *save = str;
  71         const char *cp;
  72         const char *head;
  73         int count = 0;
  74         int pad;
  75         int zeropad;
  76         int dot;
  77         double dbl;
  78 #ifdef HAVE_LONG_DOUBLE
  79         long double ldbl;
  80 #endif
  81         char fmt[32];
  82
  83         INSIST(str != NULL);
  84         INSIST(format != NULL);
  85
  86         while (*format != '\0') {
  87                 if (*format != '%') {
  88                         if (size > 1) {
  89                                 *str++ = *format;
  90                                 size--;
  91                         }
  92                         count++;
  93                         format++;
  94                         continue;
  95                 }
  96                 format++;
  97
  98                 /*
  99                  * Reset flags.
 100                  */
 101                 dot = neg = space = plus = left = zero = alt = h = l = q = 0;
 102                 width = precision = 0;
 103                 head = "";
 104                 length = pad = zeropad = 0;
 105
 106                 do {
 107                         if (*format == '#') {
 108                                 alt = 1;
 109                                 format++;
 110                         } else if (*format == '-') {
 111                                 left = 1;
 112                                 zero = 0;
 113                                 format++;
 114                         } else if (*format == ' ') {
 115                                 if (!plus)
 116                                         space = 1;
 117                                 format++;
 118                         } else if (*format == '+') {
 119                                 plus = 1;
 120                                 space = 0;
 121                                 format++;
 122                         } else if (*format == '0') {
 123                                 if (!left)
 124                                         zero = 1;
 125                                 format++;
 126                         } else
 127                                 break;
 128                 } while (1);
 129
 130                 /*
 131                  * Width.
 132                  */
 133                 if (*format == '*') {
 134                         width = va_arg(ap, int);
 135                         format++;
 136                 } else if (isdigit((unsigned char)*format)) {
 137                         char *e;
 138                         width = strtoul(format, &e, 10);
 139                         format = e;
 140                 }
 141
 142                 /*
 143                  * Precision.
 144                  */
 145                 if (*format == '.') {
 146                         format++;
 147                         dot = 1;
 148                         if (*format == '*') {
 149                                 precision = va_arg(ap, int);
 150                                 format++;
 151                         } else if (isdigit((unsigned char)*format)) {
 152                                 char *e;
 153                                 precision = strtoul(format, &e, 10);
 154                                 format = e;
 155                         }
 156                 }
 157
 158                 switch (*format) {
 159                 case '\0':
 160                         continue;
 161                 case '%':
 162                         if (size > 1) {
 163                                 *str++ = *format;
 164                                 size--;
 165                         }
 166                         count++;
 167                         break;
 168                 case 'q':
 169                         q = 1;
 170                         format++;
 171                         goto doint;
 172                 case 'h':
 173                         h = 1;
 174                         format++;
 175                         goto doint;
 176                 case 'l':
 177                         l = 1;
 178                         format++;
 179                         if (*format == 'l') {
 180                                 q = 1;
 181                                 format++;
 182                         }
 183                         goto doint;
 184                 case 'n':
 185                 case 'i':
 186                 case 'd':
 187                 case 'o':
 188                 case 'u':
 189                 case 'x':
 190                 case 'X':
 191                 doint:
 192                         if (precision != 0)
 193                                 zero = 0;
 194                         switch (*format) {
 195                         case 'n':
 196                                 if (h) {
 197                                         short int *p;
 198                                         p = va_arg(ap, short *);
 199                                         REQUIRE(p != NULL);
 200                                         *p = str - save;
 201                                 } else if (l) {
 202                                         long int *p;
 203                                         p = va_arg(ap, long *);
 204                                         REQUIRE(p != NULL);
 205                                         *p = str - save;
 206                                 } else {
 207                                         int *p;
 208                                         p = va_arg(ap, int *);
 209                                         REQUIRE(p != NULL);
 210                                         *p = str - save;
 211                                 }
 212                                 break;
 213                         case 'i':
 214                         case 'd':
 215                                 if (q)
 216                                         tmpi = va_arg(ap, isc_int64_t);
 217                                 else if (l)
 218                                         tmpi = va_arg(ap, long int);
 219                                 else
 220                                         tmpi = va_arg(ap, int);
 221                                 if (tmpi < 0) {
 222                                         head = "-";
 223                                         tmpui = -tmpi;
 224                                 } else {
 225                                         if (plus)
 226                                                 head = "+";
 227                                         else if (space)
 228                                                 head = " ";
 229                                         else
 230                                                 head = "";
 231                                         tmpui = tmpi;
 232                                 }
 233                                 sprintf(buf, "%u", tmpui);
 234                                 goto printint;
 235                         case 'o':
 236                                 if (q)
 237                                         tmpui = va_arg(ap, isc_uint64_t);
 238                                 else if (l)
 239                                         tmpui = va_arg(ap, long int);
 240                                 else
 241                                         tmpui = va_arg(ap, int);
 242                                 sprintf(buf, alt ? "%#o"
 243                                                  : "%o", tmpui);
 244                                 goto printint;
 245                         case 'u':
 246                                 if (q)
 247                                         tmpui = va_arg(ap, isc_uint64_t);
 248                                 else if (l)
 249                                         tmpui = va_arg(ap, unsigned long int);
 250                                 else
 251                                         tmpui = va_arg(ap, unsigned int);
 252                                 sprintf(buf, "%u", tmpui);
 253                                 goto printint;
 254                         case 'x':
 255                                 if (q)
 256                                         tmpui = va_arg(ap, isc_uint64_t);
 257                                 else if (l)
 258                                         tmpui = va_arg(ap, unsigned long int);
 259                                 else
 260                                         tmpui = va_arg(ap, unsigned int);
 261                                 if (alt) {
 262                                         head = "0x";
 263                                         if (precision > 2)
 264                                                 precision -= 2;
 265                                 }
 266                                 sprintf(buf, "%x", tmpui);
 267                                 goto printint;
 268                         case 'X':
 269                                 if (q)
 270                                         tmpui = va_arg(ap, isc_uint64_t);
 271                                 else if (l)
 272                                         tmpui = va_arg(ap, unsigned long int);
 273                                 else
 274                                         tmpui = va_arg(ap, unsigned int);
 275                                 if (alt) {
 276                                         head = "0X";
 277                                         if (precision > 2)
 278                                                 precision -= 2;
 279                                 }
 280                                 sprintf(buf, "%X", tmpui);
 281                                 goto printint;
 282                         printint:
 283                                 if (precision != 0 || width != 0) {
 284                                         length = strlen(buf);
 285                                         if (length < precision)
 286                                                 zeropad = precision - length;
 287                                         else if (length < width && zero)
 288                                                 zeropad = width - length;
 289                                         if (width != 0) {
 290                                                 pad = width - length -
 291                                                       zeropad - strlen(head);
 292                                                 if (pad < 0)
 293                                                         pad = 0;
 294                                         }
 295                                 }
 296                                 count += strlen(head) + strlen(buf) + pad +
 297                                          zeropad;
 298                                 if (!left) {
 299                                         while (pad > 0 && size > 1) {
 300                                                 *str++ = ' ';
 301                                                 size--;
 302                                                 pad--;
 303                                         }
 304                                 }
 305                                 cp = head;
 306                                 while (*cp != '\0' && size > 1) {
 307                                         *str++ = *cp++;
 308                                         size--;
 309                                 }
 310                                 while (zeropad > 0 && size > 1) {
 311                                         *str++ = '0';
 312                                         size--;
 313                                         zeropad--;
 314                                 }
 315                                 cp = buf;
 316                                 while (*cp != '\0' && size > 1) {
 317                                         *str++ = *cp++;
 318                                         size--;
 319                                 }
 320                                 while (pad > 0 && size > 1) {
 321                                         *str++ = ' ';
 322                                         size--;
 323                                         pad--;
 324                                 }
 325                                 break;
 326                         default:
 327                                 break;
 328                         }
 329                         break;
 330                 case 's':
 331                         cp = va_arg(ap, char *);
 332                         REQUIRE(cp != NULL);
 333
 334                         if (precision != 0) {
 335                                 /*
 336                                  * cp need not be NULL terminated.
 337                                  */
 338                                 const char *tp;
 339                                 unsigned long n;
 340
 341                                 n = precision;
 342                                 tp = cp;
 343                                 while (n != 0 && *tp != '\0')
 344                                         n--, tp++;
 345                                 length = precision - n;
 346                         } else {
 347                                 length = strlen(cp);
 348                         }
 349                         if (width != 0) {
 350                                 pad = width - length;
 351                                 if (pad < 0)
 352                                         pad = 0;
 353                         }
 354                         count += pad + length;
 355                         if (!left)
 356                                 while (pad > 0 && size > 1) {
 357                                         *str++ = ' ';
 358                                         size--;
 359                                         pad--;
 360                                 }
 361                         if (precision != 0)
 362                                 while (precision > 0 && *cp != '\0' &&
 363                                        size > 1) {
 364                                         *str++ = *cp++;
 365                                         size--;
 366                                         precision--;
 367                                 }
 368                         else
 369                                 while (*cp != '\0' && size > 1) {
 370                                         *str++ = *cp++;
 371                                         size--;
 372                                 }
 373                         while (pad > 0 && size > 1) {
 374                                 *str++ = ' ';
 375                                 size--;
 376                                 pad--;
 377                         }
 378                         break;
 379                 case 'c':
 380                         c = va_arg(ap, int);
 381                         if (width > 0) {
 382                                 count += width;
 383                                 width--;
 384                                 if (left) {
 385                                         *str++ = c;
 386                                         size--;
 387                                 }
 388                                 while (width-- > 0 && size > 1) {
 389                                         *str++ = ' ';
 390                                         size--;
 391                                 }
 392                                 if (!left && size > 1) {
 393                                         *str++ = c;
 394                                         size--;
 395                                 }
 396                         } else {
 397                                 count++;
 398                                 if (size > 1) {
 399                                         *str++ = c;
 400                                         size--;
 401                                 }
 402                         }
 403                         break;
 404                 case 'p':
 405                         v = va_arg(ap, void *);
 406                         sprintf(buf, "%p", v);
 407                         length = strlen(buf);
 408                         if (precision > length)
 409                                 zeropad = precision - length;
 410                         if (width > 0) {
 411                                 pad = width - length - zeropad;
 412                                 if (pad < 0)
 413                                         pad = 0;
 414                         }
 415                         count += length + pad + zeropad;
 416                         if (!left)
 417                                 while (pad > 0 && size > 1) {
 418                                         *str++ = ' ';
 419                                         size--;
 420                                         pad--;
 421                                 }
 422                         cp = buf;
 423                         if (zeropad > 0 && buf[0] == '0' &&
 424                             (buf[1] == 'x' || buf[1] == 'X')) {
 425                                 if (size > 1) {
 426                                         *str++ = *cp++;
 427                                         size--;
 428                                 }
 429                                 if (size > 1) {
 430                                         *str++ = *cp++;
 431                                         size--;
 432                                 }
 433                                 while (zeropad > 0 && size > 1) {
 434                                         *str++ = '0';
 435                                         size--;
 436                                         zeropad--;
 437                                 }
 438                         }
 439                         while (*cp != '\0' && size > 1) {
 440                                 *str++ = *cp++;
 441                                 size--;
 442                         }
 443                         while (pad > 0 && size > 1) {
 444                                 *str++ = ' ';
 445                                 size--;
 446                                 pad--;
 447                         }
 448                         break;
 449                 case 'D':       /*deprecated*/
 450                         INSIST("use %ld instead of %D" == NULL);
 451                 case 'O':       /*deprecated*/
 452                         INSIST("use %lo instead of %O" == NULL);
 453                 case 'U':       /*deprecated*/
 454                         INSIST("use %lu instead of %U" == NULL);
 455
 456                 case 'L':
 457 #ifdef HAVE_LONG_DOUBLE
 458                         l = 1;
 459 #else
 460                         INSIST("long doubles are not supported" == NULL);
 461 #endif
 462                         /*FALLTHROUGH*/
 463                 case 'e':
 464                 case 'E':
 465                 case 'f':
 466                 case 'g':
 467                 case 'G':
 468                         if (!dot)
 469                                 precision = 6;
 470                         /*
 471                          * IEEE floating point.
 472                          * MIN 2.2250738585072014E-308
 473                          * MAX 1.7976931348623157E+308
 474                          * VAX floating point has a smaller range than IEEE.
 475                          *
 476                          * precisions > 324 don't make much sense.
 477                          * if we cap the precision at 512 we will not
 478                          * overflow buf.
 479                          */
 480                         if (precision > 512)
 481                                 precision = 512;
 482                         sprintf(fmt, "%%%s%s.%lu%s%c", alt ? "#" : "",
 483                                 plus ? "+" : space ? " " : "",
 484                                 precision, l ? "L" : "", *format);
 485                         switch (*format) {
 486                         case 'e':
 487                         case 'E':
 488                         case 'f':
 489                         case 'g':
 490                         case 'G':
 491 #ifdef HAVE_LONG_DOUBLE
 492                                 if (l) {
 493                                         ldbl = va_arg(ap, long double);
 494                                         sprintf(buf, fmt, ldbl);
 495                                 } else
 496 #endif
 497                                 {
 498                                         dbl = va_arg(ap, double);
 499                                         sprintf(buf, fmt, dbl);
 500                                 }
 501                                 length = strlen(buf);
 502                                 if (width > 0) {
 503                                         pad = width - length;
 504                                         if (pad < 0)
 505                                                 pad = 0;
 506                                 }
 507                                 count += length + pad;
 508                                 if (!left)
 509                                         while (pad > 0 && size > 1) {
 510                                                 *str++ = ' ';
 511                                                 size--;
 512                                                 pad--;
 513                                         }
 514                                 cp = buf;
 515                                 while (*cp != ' ' && size > 1) {
 516                                         *str++ = *cp++;
 517                                         size--;
 518                                 }
 519                                 while (pad > 0 && size > 1) {
 520                                         *str++ = ' ';
 521                                         size--;
 522                                         pad--;
 523                                 }
 524                                 break;
 525                         default:
 526                                 continue;
 527                         }
 528                         break;
 529                 default:
 530                         continue;
 531                 }
 532                 format++;
 533         }
 534         if (size > 0)
 535                 *str = '\0';
 536         return (count);
 537 }
 538
 539 #endif