rdoff/rdflib.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2009 The NASM Authors - All Rights Reserved
   4  *   See the file AUTHORS included with the NASM distribution for
   5  *   the specific copyright holders.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following
   9  *   conditions are met:
  10  *
  11  *   * Redistributions of source code must retain the above copyright
  12  *     notice, this list of conditions and the following disclaimer.
  13  *   * Redistributions in binary form must reproduce the above
  14  *     copyright notice, this list of conditions and the following
  15  *     disclaimer in the documentation and/or other materials provided
  16  *     with the distribution.
  17  *
  18  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  19  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  30  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * ----------------------------------------------------------------------- */
  33
  34 /* rdflib - manipulate RDOFF library files (.rdl) */
  35
  36 /*
  37  * an rdoff library is simply a sequence of RDOFF object files, each
  38  * preceded by the name of the module, an ASCII string of up to 255
  39  * characters, terminated by a zero.
  40  *
  41  * When a library is being created, special signature block is placed
  42  * in the beginning of the file. It is a string 'RDLIB' followed by a
  43  * version number, then int32_t content size and a int32_t time stamp.
  44  * The module name of the signature block is '.sig'.
  45  *
  46  *
  47  * There may be an optional directory placed on the end of the file.
  48  * The format of the directory will be 'RDLDD' followed by a version
  49  * number, followed by the length of the directory, and then the
  50  * directory, the format of which has not yet been designed.
  51  * The module name of the directory must be '.dir'.
  52  *
  53  * All module names beginning with '.' are reserved for possible future
  54  * extensions. The linker ignores all such modules, assuming they have
  55  * the format of a six uint8_t type & version identifier followed by int32_t
  56  * content size, followed by data.
  57  */
  58
  59 #include "compiler.h"
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <errno.h>
  64 #include <string.h>
  65 #include <inttypes.h>
  66 #include <time.h>
  67 #include <inttypes.h>
  68
  69 /* functions supported:
  70  *   create a library   (no extra operands required)
  71  *   add a module from a library (requires filename and name to give mod.)
  72  *   replace a module in a library (requires given name and filename)
  73  *   delete a module from a library (requires given name)
  74  *   extract a module from the library (requires given name and filename)
  75  *   list modules
  76  */
  77
  78 const char *usage =
  79     "usage:\n"
  80     "  rdflib x libname [extra operands]\n\n"
  81     "  where x is one of:\n"
  82     "    c - create library\n"
  83     "    a - add module (operands = filename module-name)\n"
  84     "    x - extract               (module-name filename)\n"
  85     "    r - replace               (module-name filename)\n"
  86     "    d - delete                (module-name)\n" "    t - list\n";
  87
  88 /* Library signature */
  89 const char *rdl_signature = "RDLIB2", *sig_modname = ".sig";
  90
  91 char **_argv;
  92
  93 #define _ENDIANNESS 0           /* 0 for little, 1 for big */
  94
  95 static void int32_ttolocal(int32_t *l)
  96 {
  97 #if _ENDIANNESS
  98     uint8_t t;
  99     uint8_t *p = (uint8_t *)l;
 100
 101     t = p[0];
 102     p[0] = p[3];
 103     p[3] = t;
 104     t = p[1];
 105     p[1] = p[2];
 106     p[2] = p[1];
 107 #else
 108     (void)l;             /* placate optimizers */
 109 #endif
 110 }
 111
 112 static char copybytes(FILE * fp, FILE * fp2, int n)
 113 {
 114     int i, t = 0;
 115
 116     for (i = 0; i < n; i++) {
 117         t = fgetc(fp);
 118         if (t == EOF) {
 119             fprintf(stderr, "rdflib: premature end of file in '%s'\n",
 120                     _argv[2]);
 121             exit(1);
 122         }
 123         if (fp2)
 124             if (fputc(t, fp2) == EOF) {
 125                 fprintf(stderr, "rdflib: write error\n");
 126                 exit(1);
 127             }
 128     }
 129     return (char)t;             /* return last char read */
 130 }
 131
 132 static int32_t copyint32_t(FILE * fp, FILE * fp2)
 133 {
 134     int32_t l;
 135     int i, t;
 136     uint8_t *p = (uint8_t *)&l;
 137
 138     for (i = 0; i < 4; i++) {   /* skip magic no */
 139         t = fgetc(fp);
 140         if (t == EOF) {
 141             fprintf(stderr, "rdflib: premature end of file in '%s'\n",
 142                     _argv[2]);
 143             exit(1);
 144         }
 145         if (fp2)
 146             if (fputc(t, fp2) == EOF) {
 147                 fprintf(stderr, "rdflib: write error\n");
 148                 exit(1);
 149             }
 150         *p++ = t;
 151     }
 152     int32_ttolocal(&l);
 153     return l;
 154 }
 155
 156 int main(int argc, char **argv)
 157 {
 158     FILE *fp, *fp2 = NULL, *fptmp;
 159     char *p, buf[256], c;
 160     int i;
 161     int32_t l;
 162     time_t t;
 163     char rdbuf[10];
 164
 165     _argv = argv;
 166
 167     if (argc < 3 || !strncmp(argv[1], "-h", 2)
 168         || !strncmp(argv[1], "--h", 3)) {
 169         fputs(usage, stdout);
 170         exit(1);
 171     }
 172
 173     switch (argv[1][0]) {
 174     case 'c':                  /* create library */
 175         fp = fopen(argv[2], "wb");
 176         if (!fp) {
 177             fprintf(stderr, "rdflib: could not open '%s'\n", argv[2]);
 178             perror("rdflib");
 179             exit(1);
 180         }
 181         fwrite(sig_modname, 1, strlen(sig_modname) + 1, fp);
 182         fwrite(rdl_signature, 1, strlen(rdl_signature), fp);
 183         t = time(NULL);
 184         l = sizeof(t);
 185         fwrite(&l, sizeof(l), 1, fp);
 186         fwrite(&t, 1, l, fp);
 187         fclose(fp);
 188         break;
 189
 190     case 'a':                  /* add module */
 191         if (argc < 5) {
 192             fprintf(stderr, "rdflib: required parameter missing\n");
 193             exit(1);
 194         }
 195         fp = fopen(argv[2], "ab");
 196         if (!fp) {
 197             fprintf(stderr, "rdflib: could not open '%s'\n", argv[2]);
 198             perror("rdflib");
 199             exit(1);
 200         }
 201
 202         fp2 = fopen(argv[3], "rb");
 203         if (!fp2) {
 204             fprintf(stderr, "rdflib: could not open '%s'\n", argv[3]);
 205             perror("rdflib");
 206             exit(1);
 207         }
 208
 209         p = argv[4];
 210         do {
 211             if (fputc(*p, fp) == EOF) {
 212                 fprintf(stderr, "rdflib: write error\n");
 213                 exit(1);
 214             }
 215         } while (*p++);
 216
 217         while (!feof(fp2)) {
 218             i = fgetc(fp2);
 219             if (i == EOF) {
 220                 break;
 221             }
 222
 223             if (fputc(i, fp) == EOF) {
 224                 fprintf(stderr, "rdflib: write error\n");
 225                 exit(1);
 226             }
 227         }
 228         fclose(fp2);
 229         fclose(fp);
 230         break;
 231
 232     case 'x':
 233         if (argc < 5) {
 234             fprintf(stderr, "rdflib: required parameter missing\n");
 235             exit(1);
 236         }
 237     case 't':
 238         fp = fopen(argv[2], "rb");
 239         if (!fp) {
 240             fprintf(stderr, "rdflib: could not open '%s'\n", argv[2]);
 241             perror("rdflib");
 242             exit(1);
 243         }
 244
 245         fp2 = NULL;
 246         while (!feof(fp)) {
 247             /* read name */
 248             p = buf;
 249             while ((*(p++) = (char)fgetc(fp)))
 250                 if (feof(fp))
 251                     break;
 252
 253             if (feof(fp))
 254                 break;
 255
 256             fp2 = NULL;
 257             if (argv[1][0] == 'x') {
 258                 /* check against desired name */
 259                 if (!strcmp(buf, argv[3])) {
 260                     fp2 = fopen(argv[4], "wb");
 261                     if (!fp2) {
 262                         fprintf(stderr, "rdflib: could not open '%s'\n",
 263                                 argv[4]);
 264                         perror("rdflib");
 265                         exit(1);
 266                     }
 267                 }
 268             } else
 269                 printf("%-40s ", buf);
 270
 271             /* step over the RDOFF file, extracting type information for
 272              * the listing, and copying it if fp2 != NULL */
 273
 274             if (buf[0] == '.') {
 275
 276                 if (argv[1][0] == 't')
 277                     for (i = 0; i < 6; i++)
 278                         printf("%c", copybytes(fp, fp2, 1));
 279                 else
 280                     copybytes(fp, fp2, 6);
 281
 282                 l = copyint32_t(fp, fp2);
 283
 284                 if (argv[1][0] == 't')
 285                     printf("   %"PRId32" bytes content\n", l);
 286
 287                 copybytes(fp, fp2, l);
 288             } else if ((c = copybytes(fp, fp2, 6)) >= '2') {    /* version 2 or above */
 289                 l = copyint32_t(fp, fp2);
 290
 291                 if (argv[1][0] == 't')
 292                     printf("RDOFF%c   %"PRId32" bytes content\n", c, l);
 293                 copybytes(fp, fp2, l);  /* entire object */
 294             } else {
 295                 if (argv[1][0] == 't')
 296                     printf("RDOFF1\n");
 297                 /*
 298                  * version 1 object, so we don't have an object content
 299                  * length field.
 300                  */
 301                 copybytes(fp, fp2, copyint32_t(fp, fp2));  /* header */
 302                 copybytes(fp, fp2, copyint32_t(fp, fp2));  /* text */
 303                 copybytes(fp, fp2, copyint32_t(fp, fp2));  /* data */
 304             }
 305
 306             if (fp2)
 307                 break;
 308         }
 309         fclose(fp);
 310         if (fp2)
 311             fclose(fp2);
 312         else if (argv[1][0] == 'x') {
 313             fprintf(stderr, "rdflib: module '%s' not found in '%s'\n",
 314                     argv[3], argv[2]);
 315             exit(1);
 316         }
 317         break;
 318
 319     case 'r':                  /* replace module */
 320         argc--;
 321     case 'd':                  /* delete module */
 322         if (argc < 4) {
 323             fprintf(stderr, "rdflib: required parameter missing\n");
 324             exit(1);
 325         }
 326
 327         fp = fopen(argv[2], "rb");
 328         if (!fp) {
 329             fprintf(stderr, "rdflib: could not open '%s'\n", argv[2]);
 330             perror("rdflib");
 331             exit(1);
 332         }
 333
 334         if (argv[1][0] == 'r') {
 335             fp2 = fopen(argv[4], "rb");
 336             if (!fp2) {
 337                 fprintf(stderr, "rdflib: could not open '%s'\n", argv[4]);
 338                 perror("rdflib");
 339                 exit(1);
 340             }
 341         }
 342
 343         fptmp = tmpfile();
 344         if (!fptmp) {
 345             fprintf(stderr, "rdflib: could not open temporary file\n");
 346             perror("rdflib");
 347             exit(1);
 348         }
 349
 350         /* copy library into temporary file */
 351         fseek(fp, 0, SEEK_END); /* get file length */
 352         l = ftell(fp);
 353         fseek(fp, 0, SEEK_SET);
 354         copybytes(fp, fptmp, l);
 355         rewind(fptmp);
 356         freopen(argv[2], "wb", fp);
 357
 358         while (!feof(fptmp)) {
 359             /* read name */
 360             p = buf;
 361             while ((*(p++) = (char)fgetc(fptmp)))
 362                 if (feof(fptmp))
 363                     break;
 364
 365             if (feof(fptmp))
 366                 break;
 367
 368             /* check against desired name */
 369             if (!strcmp(buf, argv[3])) {
 370                 fread(p = rdbuf, 1, sizeof(rdbuf), fptmp);
 371                 l = *(int32_t *)(p + 6);
 372                 fseek(fptmp, l, SEEK_CUR);
 373                 break;
 374             } else {
 375                 fwrite(buf, 1, strlen(buf) + 1, fp);    /* module name */
 376                 if ((c = copybytes(fptmp, fp, 6)) >= '2') {
 377                     l = copyint32_t(fptmp, fp);    /* version 2 or above */
 378                     copybytes(fptmp, fp, l);    /* entire object */
 379                 }
 380             }
 381         }
 382
 383         if (argv[1][0] == 'r') {
 384             /* copy new module into library */
 385             p = argv[3];
 386             do {
 387                 if (fputc(*p, fp) == EOF) {
 388                     fprintf(stderr, "rdflib: write error\n");
 389                     exit(1);
 390                 }
 391             } while (*p++);
 392
 393             while (!feof(fp2)) {
 394                 i = fgetc(fp2);
 395                 if (i == EOF) {
 396                     break;
 397                 }
 398                 if (fputc(i, fp) == EOF) {
 399                     fprintf(stderr, "rdflib: write error\n");
 400                     exit(1);
 401                 }
 402             }
 403             fclose(fp2);
 404         }
 405
 406         /* copy rest of library if any */
 407         while (!feof(fptmp)) {
 408             i = fgetc(fptmp);
 409             if (i == EOF) {
 410                 break;
 411             }
 412
 413             if (fputc(i, fp) == EOF) {
 414                 fprintf(stderr, "rdflib: write error\n");
 415                 exit(1);
 416             }
 417         }
 418
 419         fclose(fp);
 420         fclose(fptmp);
 421         break;
 422
 423     default:
 424         fprintf(stderr, "rdflib: command '%c' not recognized\n",
 425                 argv[1][0]);
 426         exit(1);
 427     }
 428     return 0;
 429 }