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rdps.c

/* rdps.c
 *
 * $Id: rdps.c 18569 2006-06-24 03:39:54Z sahlberg $
 * 
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/* takes the file listed as the first argument and creates the file listed
as the second argument. It takes a PostScript file and creates a C program
with 2 functions:
      print_ps_preamble()
      print_ps_finale()

*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BUFFER_SIZE 1024

void start_code(FILE *fd, const char *func);
void write_code(FILE *fd, char *string);
void end_code(FILE *fd);
void ps_clean_string(char *out, const char *in,
                  int outbuf_size);

enum ps_state { null, preamble, finale };

int main(int argc, char **argv)
{
      FILE  *input;
      FILE  *output;
      char  buf[BUFFER_SIZE]; /* static sized buffer! */
      enum ps_state     state = null;

      if (argc != 3) {
            fprintf(stderr, "%s: input_file output_file\n", argv[0]);
            exit(-1);
      }

      if (!(input = fopen(argv[1], "r"))) {
            fprintf(stderr, "%s: cannot open %s for input.\n", argv[0], argv[1]);
            exit(-1);
      }

      if (!(output = fopen(argv[2], "w"))) {
            fprintf(stderr, "%s: cannot open %s for output.\n", argv[0], argv[2]);
            exit(-1);
      }

      fprintf(output, "/* Created by rdps.c. Do not edit! */\n\n"
          "#include <stdio.h>\n\n"
          "#include \"ps.h\"\n\n");

      while (fgets(buf, BUFFER_SIZE - 1, input)) {

            if (state == null) {
                  if (strcmp(buf, "% ---- wireshark preamble start ---- %\n") == 0) {
                        state = preamble;
                        start_code(output, "preamble");
                        continue;
                  }
                  else if (strcmp(buf, "% ---- wireshark finale start ---- %\n") == 0) {
                        state = finale;
                        start_code(output, "finale");
                        continue;
                  }
            }
            else if (state == preamble) {
                  if (strcmp(buf, "% ---- wireshark preamble end ---- %\n") == 0) {
                        state = null;
                        end_code(output);
                        continue;
                  }
                  else {
                        write_code(output, buf);
                  }
            }
            else if (state == finale) {
                  if (strcmp(buf, "% ---- wireshark finale end ---- %\n") == 0) {
                        state = null;
                        end_code(output);
                        continue;
                  }
                  else {
                        write_code(output, buf);
                  }
            }
            else {
                  fprintf(stderr, "NO MATCH:%s", buf);
                  exit(-1);
            }
      }
        exit(0);
}

void start_code(FILE *fd, const char *func)
{
      fprintf(fd, "/* Created by rdps.c. Do not edit! */\n");
      fprintf(fd, "void print_ps_%s(FILE *fd) {\n", func);
}

void write_code(FILE *fd, char *string)
{
      char psbuf[BUFFER_SIZE];
      ps_clean_string(psbuf, string, BUFFER_SIZE);
      fprintf(fd, "\tfprintf(fd, \"%s\");\n", psbuf);
}

void end_code(FILE *fd)
{
      fprintf(fd, "}\n\n\n");
}

void ps_clean_string(char *out, const char *in,
                  int outbuf_size)
{
      int rd, wr;
      char c;

      for (rd = 0, wr = 0 ; wr < outbuf_size; rd++, wr++ ) {
            c = in[rd];
            switch (c) {
                  case '\\':
                        out[wr] = '\\';
                        out[++wr] = '\\';
                        out[++wr] = c;
                        break;

                  case '%':
                        out[wr] = '%';
                        out[++wr] = '%';
                        break;

                  case '\n':
                        out[wr] = '\\';
                        out[++wr] = 'n';
                        break;

                  default:
                        out[wr] = c;
                        break;
            }

            if (c == 0) {
                  break;
            }
      }
}

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