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

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <ctype.h>
   5 #include "assfile.h"
   6 #include "cfgopt.h"
   7
   8 #ifdef NDEBUG
   9 /* release default options */
  10 #define DEFOPT_FULLSCR  1
  11 #define DEFOPT_VSYNC    1
  12 #define DEFOPT_MUSIC    1
  13 #else
  14 /* debug default options */
  15 #define DEFOPT_FULLSCR  0
  16 #define DEFOPT_VSYNC    1
  17 #define DEFOPT_MUSIC    1
  18 #endif
  19
  20 struct options opt = {
  21         0,      /* screen name */
  22         DEFOPT_FULLSCR,
  23         DEFOPT_VSYNC,
  24         DEFOPT_MUSIC
  25 };
  26
  27 static const char *usagefmt = "Usage: %s [options]\n"
  28         "Options:\n"
  29         "  -music/-nomusic      toggle music playback\n"
  30         "  -scr,-screen <name>  ignore demoscript, run specific screen\n"
  31         "  -fs/-win             run fullscreen/windowed\n"
  32         "  -vsync/-novsync      toggle vsync\n"
  33         "  -h,-help             print usage and exit\n";
  34
  35 int parse_args(int argc, char **argv)
  36 {
  37         int i;
  38         char *scrname = 0;
  39
  40         for(i=1; i<argc; i++) {
  41                 if(argv[i][0] == '-') {
  42                         if(strcmp(argv[i], "-music") == 0) {
  43                                 opt.music = 1;
  44                         } else if(strcmp(argv[i], "-nomusic") == 0) {
  45                                 opt.music = 0;
  46                         } else if(strcmp(argv[i], "-scr") == 0 || strcmp(argv[i], "-screen") == 0) {
  47                                 scrname = argv[++i];
  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], "-fs") == 0) {
  53                                 opt.fullscreen = 1;
  54                         } else if(strcmp(argv[i], "-win") == 0) {
  55                                 opt.fullscreen = 0;
  56                         } else if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
  57                                 printf(usagefmt, argv[0]);
  58                                 exit(0);
  59                         } else {
  60                                 fprintf(stderr, "invalid option: %s\n", argv[i]);
  61                                 fprintf(stderr, usagefmt, argv[0]);
  62                                 return -1;
  63                         }
  64                 } else {
  65                         if(scrname) {
  66                                 fprintf(stderr, "unexpected option: %s\n", argv[i]);
  67                                 fprintf(stderr, usagefmt, argv[0]);
  68                                 return -1;
  69                         }
  70                         scrname = argv[i];
  71                 }
  72         }
  73
  74         if(scrname) {
  75                 opt.scrname = scrname;
  76         }
  77         return 0;
  78 }
  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 = ass_fopen(fname, "rb"))) {
 118                 return 0;       /* just ignore missing config files */
 119         }
 120
 121         while(ass_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                         ass_fclose(fp);
 132                         return -1;
 133                 }
 134                 *value++ = 0;
 135
 136                 if(!(key = strip_space(line)) || !(value = strip_space(value))) {
 137                         fprintf(stderr, "%s:%d invalid key/value pair\n", fname, nline);
 138                         ass_fclose(fp);
 139                         return -1;
 140                 }
 141
 142                 if(strcmp(line, "music") == 0) {
 143                         opt.music = bool_value(value);
 144                 } else if(strcmp(line, "screen") == 0) {
 145                         opt.scrname = strdup(value);
 146                 } else if(strcmp(line, "vsync") == 0) {
 147                         opt.vsync = bool_value(value);
 148                 } else if(strcmp(line, "fullscreen") == 0) {
 149                         opt.fullscreen = bool_value(value);
 150                 } else {
 151                         fprintf(stderr, "%s:%d invalid option: %s\n", fname, nline, line);
 152                         ass_fclose(fp);
 153                         return -1;
 154                 }
 155         }
 156
 157         ass_fclose(fp);
 158         return 0;
 159 }