git.mutantstargoat.com Git - raydungeon/blob - src/options.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <errno.h>
   5 #include "options.h"
   6 #include "treestor.h"
   7
   8 #define DEF_XRES                1280
   9 #define DEF_YRES                800
  10 #define DEF_VSYNC               1
  11 #define DEF_VOL                 255
  12 #define DEF_MUS                 1
  13 #define DEF_FULLSCR             0
  14 #define DEF_INVMOUSEY   0
  15 #define DEF_MOUSE_SPEED 50
  16
  17
  18 struct options opt = {
  19         DEF_XRES, DEF_YRES,
  20         DEF_VSYNC,
  21         DEF_FULLSCR,
  22         DEF_VOL, DEF_VOL, DEF_VOL,
  23         DEF_MUS,
  24         DEF_INVMOUSEY,
  25         DEF_MOUSE_SPEED,
  26 };
  27
  28 int parse_options(int argc, char **argv)
  29 {
  30         int i;
  31         static const char *usage_fmt = "Usage: %s [options]\n"
  32                 "Options:\n"
  33                 " -screen <name>: select starting screen\n"
  34                 " -h,-help: print usage information and exit\n\n";
  35
  36         for(i=1; i<argc; i++) {
  37                 if(argv[i][0] == '-') {
  38                         if(strcmp(argv[i], "-scr") == 0 || strcmp(argv[i], "-screen") == 0) {
  39                                 if(!argv[++i]) {
  40                                         fprintf(stderr, "%s must be followed by a screen name\n", argv[i - 1]);
  41                                         return -1;
  42                                 }
  43                         } else if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
  44                                 printf(usage_fmt, argv[0]);
  45                                 exit(0);
  46                         } else {
  47                                 fprintf(stderr, "invalid option: %s\n", argv[i]);
  48                                 return -1;
  49                         }
  50                 } else {
  51                         fprintf(stderr, "unexpected argument: %s\n", argv[i]);
  52                         return -1;
  53                 }
  54         }
  55
  56         return 0;
  57 }
  58
  59 int load_options(const char *fname)
  60 {
  61         struct ts_node *cfg;
  62
  63         if(!(cfg = ts_load(fname))) {
  64                 return -1;
  65         }
  66         printf("loaded config: %s\n", fname);
  67
  68         opt.xres = ts_lookup_int(cfg, "options.video.xres", DEF_XRES);
  69         opt.yres = ts_lookup_int(cfg, "options.video.yres", DEF_YRES);
  70         opt.vsync = ts_lookup_int(cfg, "options.video.vsync", DEF_VSYNC);
  71         opt.fullscreen = ts_lookup_int(cfg, "options.video.fullscreen", DEF_FULLSCR);
  72
  73         opt.vol_master = ts_lookup_int(cfg, "options.audio.volmaster", DEF_VOL);
  74         opt.vol_mus = ts_lookup_int(cfg, "options.audio.volmusic", DEF_VOL);
  75         opt.vol_sfx = ts_lookup_int(cfg, "options.audio.volsfx", DEF_VOL);
  76         opt.music = ts_lookup_int(cfg, "options.audio.music", DEF_MUS);
  77
  78         opt.inv_mouse_y = ts_lookup_int(cfg, "options.controls.invmousey", DEF_INVMOUSEY);
  79         opt.mouse_speed = ts_lookup_int(cfg, "options.controls.mousespeed", DEF_MOUSE_SPEED);
  80
  81         ts_free_tree(cfg);
  82         return 0;
  83 }
  84
  85 #define WROPT(lvl, fmt, val, defval) \
  86         do { \
  87                 int i; \
  88                 for(i=0; i<lvl; i++) fputc('\t', fp); \
  89                 if((val) == (defval)) { \
  90                         fprintf(fp, fmt "\t# default\n", val); \
  91                 } else { \
  92                         fprintf(fp, fmt "\n", val); \
  93                 } \
  94         } while(0)
  95
  96 int save_options(const char *fname)
  97 {
  98         FILE *fp;
  99
 100         printf("writing config: %s\n", fname);
 101
 102         if(!(fp = fopen(fname, "wb"))) {
 103                 fprintf(stderr, "failed to save options (%s): %s\n", fname, strerror(errno));
 104         }
 105         fprintf(fp, "options {\n");
 106         fprintf(fp, "\tvideo {\n");
 107         WROPT(2, "xres = %d", opt.xres, DEF_XRES);
 108         WROPT(2, "yres = %d", opt.yres, DEF_YRES);
 109         WROPT(2, "vsync = %d", opt.vsync, DEF_VSYNC);
 110         WROPT(2, "fullscreen = %d", opt.fullscreen, DEF_FULLSCR);
 111         fprintf(fp, "\t}\n");
 112
 113         fprintf(fp, "\taudio {\n");
 114         WROPT(2, "volmaster = %d", opt.vol_master, DEF_VOL);
 115         WROPT(2, "volmusic = %d", opt.vol_mus, DEF_VOL);
 116         WROPT(2, "volsfx = %d", opt.vol_sfx, DEF_VOL);
 117         WROPT(2, "music = %d", opt.music ? 1 : 0, DEF_MUS);
 118         fprintf(fp, "\t}\n");
 119
 120         fprintf(fp, "\tcontrols {\n");
 121         WROPT(2, "invmousey = %d", opt.inv_mouse_y, DEF_INVMOUSEY);
 122         WROPT(2, "mousespeed = %d", opt.mouse_speed, DEF_MOUSE_SPEED);
 123         fprintf(fp, "\t}\n");
 124
 125         fprintf(fp, "}\n");
 126         fprintf(fp, "# v" "i:ts=4 sts=4 sw=4 noexpandtab:\n");
 127
 128         fclose(fp);
 129         return 0;
 130 }