datatoc.c

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
/* #define VERBOSE */
 
#define MAX2(x, y) ((x) > (y) ? (x) : (y))
#define MAX3(x, y, z) MAX2(MAX2((x), (y)), (z))
 
static char *basename(char *string)
{
  char *lfslash, *lbslash;
 
  lfslash = strrchr(string, '/');
  lbslash = strrchr(string, '\\');
  if (lbslash) {
    lbslash++;
  }
  if (lfslash) {
    lfslash++;
  }
 
  return MAX3(string, lfslash, lbslash);
}
 
int main(int argc, char **argv)
{
  FILE *fpin, *fpout;
  long size;
  int i;
  int argv_len;
 
  if (argc < 2) {
    printf("Usage: datatoc <data_file_from> <data_file_to>\n");
    exit(1);
  }
 
  fpin = fopen(argv[1], "rb");
  if (!fpin) {
    printf("Unable to open input <%s>\n", argv[1]);
    exit(1);
  }
 
  argv[1] = basename(argv[1]);
 
  fseek(fpin, 0L, SEEK_END);
  size = ftell(fpin);
  fseek(fpin, 0L, SEEK_SET);
 
  if (argv[1][0] == '.') {
    argv[1]++;
  }
 
#ifdef VERBOSE
  printf("Making C file <%s>\n", argv[2]);
#endif
 
  argv_len = (int)strlen(argv[1]);
  for (i = 0; i < argv_len; i++) {
    if (argv[1][i] == '.') {
      argv[1][i] = '_';
    }
  }
 
  fpout = fopen(argv[2], "w");
  if (!fpout) {
    fprintf(stderr, "Unable to open output <%s>\n", argv[2]);
    exit(1);
  }
 
  fprintf(fpout, "/* DataToC output of file <%s> */\n\n", argv[1]);
 
  /* Quiet 'missing-variable-declarations' warning. */
  fprintf(fpout, "extern const int datatoc_%s_size;\n", argv[1]);
  fprintf(fpout, "extern const char datatoc_%s[];\n\n", argv[1]);
 
  fprintf(fpout, "const int datatoc_%s_size = %d;\n", argv[1], (int)size);
  fprintf(fpout, "const char datatoc_%s[] = {\n", argv[1]);
  while (size--) {
    /* if we want to open in an editor
     * this is nicer to avoid very long lines */
#ifdef VERBOSE
    if (size % 32 == 31) {
      fprintf(fpout, "\n");
    }
#endif
 
    /* fprintf (fpout, "\\x%02x", getc(fpin)); */
    fprintf(fpout, "%3d,", getc(fpin));
  }
 
  /* Trailing NULL terminator, this isn't needed in some cases and
   * won't be taken into account by the size variable, but its useful when dealing with
   * NULL terminated string data */
  fprintf(fpout, "0\n};\n\n");
 
  fclose(fpin);
  fclose(fpout);
  return 0;
}