mkjambase.c

   1 /*
   2  * Copyright 1993, 1995 Christopher Seiwald.
   3  *
   4  * This file is part of Jam - see jam.c for Copyright information.
   5  */
   6
   7 /*
   8  * mkjambase.c - turn Jambase into a big C structure
   9  *
  10  * Usage: mkjambase jambase.c Jambase ...
  11  *
  12  * Results look like this:
  13  *
  14  *   char *jambase[] = {
  15  *   "...\n",
  16  *   ...
  17  *   0 };
  18  *
  19  * Handles \'s and "'s specially; knows how to delete blank and comment lines.
  20  *
  21  * 11/04/02 (seiwald) - const-ing for string literals
  22  */
  23
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <error.h>
  27
  28
  29 #define EMIT(ch)  {if (outp-outbuf>2046) error(1, 0, "output line too big\n"); *(outp++) = (ch); }
  30
  31
  32 int main (int argc, char **argv, char **envp) {
  33   char buf[1024], outbuf[2048];
  34   FILE *fin;
  35   FILE *fout;
  36   char *p, *e, quoteCh, *outp;
  37   int doDotC = 0, wasScreen, dontStrip = 0, dropSpaces;
  38
  39   if (argc < 3) {
  40     fprintf(stderr, "usage: %s jambase.c Jambase ...\n", argv[0]);
  41     return -1;
  42   }
  43
  44   if (!(fout = fopen(argv[1], "w"))) {
  45     perror(argv[1]);
  46     return -1;
  47   }
  48
  49   /* if the file ends in .c generate a C source file */
  50   if ((p = strrchr(argv[1], '.')) && !strcmp(p, ".c")) ++doDotC;
  51
  52   /* now process the files */
  53   argc -= 2, argv += 2;
  54
  55   if (doDotC) {
  56     fprintf(fout, "/* Generated by mkjambase from Jambase */\n");
  57     fprintf(fout, "const char *jambase[] = {\n");
  58   }
  59
  60   for (; argc--; ++argv) {
  61     if (!(fin = fopen(*argv, "r"))) {
  62       perror(*argv);
  63       return -1;
  64     }
  65     if (doDotC) fprintf(fout, "/* %s */\n", *argv); else fprintf(fout, "### %s ###\n", *argv);
  66     //
  67     while (fgets(buf, sizeof(buf), fin)) {
  68       if (doDotC) {
  69         if (!strncmp(buf, "#DONT_TOUCH", 11)) {
  70           dontStrip = !dontStrip;
  71           continue;
  72         }
  73         char *p = buf;
  74         /* strip leading whitespace */
  75         if (!dontStrip) {
  76           while (*p && *((unsigned char *)p) <= ' ') ++p;
  77           /* drop comments and empty lines */
  78           if (*p == '#' || !*p) continue;
  79         }
  80         /* copy; drop comments if # is not in quotes */
  81         outp = outbuf; quoteCh = 0; wasScreen = 0;
  82         EMIT('"');
  83         dropSpaces = 0;
  84         for (; *p && *p != '\n' && *p != '\r'; p++) {
  85           if (!dontStrip) {
  86             if (!quoteCh && !wasScreen && *p == '#') break; /* comment follows; drop it */
  87           }
  88           switch (*p) {
  89             case '\\':
  90               EMIT('\\'); EMIT('\\');
  91               wasScreen = !wasScreen;
  92               dropSpaces = 0;
  93               break;
  94             case '"':
  95               EMIT('\\'); EMIT('"');
  96               if (!wasScreen) quoteCh = (quoteCh==*p)?0:*p;
  97               dropSpaces = 0;
  98               break;
  99             case '\x27': /* ' */
 100               EMIT('\x27');
 101               if (!wasScreen) quoteCh = (quoteCh==*p)?0:*p;
 102               dropSpaces = 0;
 103               break;
 104             default:
 105               if (!dontStrip && *((unsigned char *)p) <= ' ') {
 106                 if (wasScreen || !dropSpaces) EMIT(*p);
 107                 dropSpaces = !wasScreen;
 108               } else {
 109                 EMIT(*p);
 110                 dropSpaces = 0;
 111               }
 112               wasScreen = 0;
 113               break;
 114           }
 115         }
 116         /* terminate output */
 117         *outp = '\0';
 118         if (!dontStrip) {
 119           /* strip ending whitespace */
 120           e = outp-1;
 121           while (e >= outbuf && *((unsigned char *)e) <= ' ') --e;
 122           *(++e) = '\0';
 123           /* drop empty line */
 124           if (!outbuf[0]) continue;
 125         }
 126         fprintf(fout, "%s\\n\",\n", outbuf);
 127       } else {
 128         fprintf(fout, "%s", buf);
 129       }
 130     }
 131     fclose(fin);
 132   }
 133   if (doDotC) fprintf(fout, "0};\n");
 134   fclose(fout);
 135
 136   return 0;
 137 }