git.mutantstargoat.com Git - dosdemo/blob - src/cfgopt.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <ctype.h>
   5 #include "cfgopt.h"
   6
   7 #ifdef NDEBUG
   8 /* release build default options */
   9 struct options opt = {
  10         0,      /* start_scr */
  11         1,      /* music */
  12         0,      /* mouse */
  13         0,      /* sball */
  14         0,      /* vsync */
  15         0       /* dbginfo */
  16 };
  17 #else
  18 /* debug build default options */
  19 struct options opt = {
  20         0,      /* start_scr */
  21         0,      /* music */
  22         1,      /* mouse */
  23         0,      /* sball */
  24         0,      /* vsync */
  25         1       /* dbginfo */
  26 };
  27 #endif
  28
  29 int parse_args(int argc, char **argv)
  30 {
  31         int i;
  32         char *scrname = 0;
  33
  34         for(i=1; i<argc; i++) {
  35                 if(argv[i][0] == '-') {
  36                         if(strcmp(argv[i], "-music") == 0) {
  37                                 opt.music = 1;
  38                         } else if(strcmp(argv[i], "-nomusic") == 0) {
  39                                 opt.music = 0;
  40                         } else if(strcmp(argv[i], "-scr") == 0 || strcmp(argv[i], "-screen") == 0) {
  41                                 scrname = argv[++i];
  42                         } else if(strcmp(argv[i], "-mouse") == 0) {
  43                                 opt.mouse = 1;
  44                         } else if(strcmp(argv[i], "-nomouse") == 0) {
  45                                 opt.mouse = 0;
  46                         } else if(strcmp(argv[i], "-sball") == 0) {
  47                                 opt.sball = !opt.sball;
  48                         } else if(strcmp(argv[i], "-vsync") == 0) {
  49                                 opt.vsync = 1;
  50                         } else if(strcmp(argv[i], "-novsync") == 0) {
  51                                 opt.vsync = 0;
  52                         } else if(strcmp(argv[i], "-dbg") == 0) {
  53                                 opt.dbginfo = 1;
  54                         } else if(strcmp(argv[i], "-nodbg") == 0) {
  55                                 opt.dbginfo = 0;
  56 #ifndef MSDOS
  57                         } else if(strcmp(argv[i], "-fs") == 0) {
  58                                 opt.fullscreen = 1;
  59                         } else if(strcmp(argv[i], "-win") == 0) {
  60                                 opt.fullscreen = 0;
  61 #endif
  62                         } else {
  63                                 fprintf(stderr, "invalid option: %s\n", argv[i]);
  64                                 return -1;
  65                         }
  66                 } else {
  67                         if(scrname) {
  68                                 fprintf(stderr, "unexpected option: %s\n", argv[i]);
  69                                 return -1;
  70                         }
  71                         scrname = argv[i];
  72                 }
  73         }
  74
  75         if(scrname) {
  76                 opt.start_scr = scrname;
  77         }
  78         return 0;
  79 }
  80
  81 static char *strip_space(char *s)
  82 {
  83         int len;
  84         char *end;
  85
  86         while(*s && isspace(*s)) ++s;
  87         if(!*s) return 0;
  88
  89         if((end = strrchr(s, '#'))) {
  90                 --end;
  91         } else {
  92                 len = strlen(s);
  93                 end = s + len - 1;
  94         }
  95
  96         while(end > s && isspace(*end)) *end-- = 0;
  97         return end > s ? s : 0;
  98 }
  99
 100 static int bool_value(char *s)
 101 {
 102         char *ptr = s;
 103         while(*ptr) {
 104                 *ptr = tolower(*ptr);
 105                 ++ptr;
 106         }
 107
 108         return strcmp(s, "true") == 0 || strcmp(s, "yes") == 0 || strcmp(s, "1") == 0;
 109 }
 110
 111 int load_config(const char *fname)
 112 {
 113         FILE *fp;
 114         char buf[256];
 115         int nline = 0;
 116
 117         if(!(fp = fopen(fname, "rb"))) {
 118                 return 0;       /* just ignore missing config files */
 119         }
 120
 121         while(fgets(buf, sizeof buf, fp)) {
 122                 char *line, *key, *value;
 123
 124                 ++nline;
 125                 if(!(line = strip_space(buf))) {
 126                         continue;
 127                 }
 128
 129                 if(!(value = strchr(line, '='))) {
 130                         fprintf(stderr, "%s:%d invalid key/value pair\n", fname, nline);
 131                         return -1;
 132                 }
 133                 *value++ = 0;
 134
 135                 if(!(key = strip_space(line)) || !(value = strip_space(value))) {
 136                         fprintf(stderr, "%s:%d invalid key/value pair\n", fname, nline);
 137                         return -1;
 138                 }
 139
 140                 if(strcmp(line, "music") == 0) {
 141                         opt.music = bool_value(value);
 142                 } else if(strcmp(line, "screen") == 0) {
 143                         opt.start_scr = strdup(value);
 144                 } else if(strcmp(line, "mouse") == 0) {
 145                         opt.mouse = bool_value(value);
 146                 } else if(strcmp(line, "sball") == 0) {
 147                         opt.sball = bool_value(value);
 148                 } else if(strcmp(line, "vsync") == 0) {
 149                         opt.vsync = bool_value(value);
 150                 } else if(strcmp(line, "debug") == 0) {
 151                         opt.dbginfo = bool_value(value);
 152 #ifndef MSDOS
 153                 } else if(strcmp(line, "fullscreen") == 0) {
 154                         opt.fullscreen = bool_value(value);
 155 #endif
 156                 } else {
 157                         fprintf(stderr, "%s:%d invalid option: %s\n", fname, nline, line);
 158                         return -1;
 159                 }
 160         }
 161         return 0;
 162 }