src/video/omapdss/config.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2010
   3  *
   4  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <strings.h>
  12 #include <ctype.h>
  13
  14 #include "omapsdl.h"
  15
  16 int gcfg_force_vsync;
  17 int gcfg_force_doublebuf;
  18
  19 static char *sskip(char *p)
  20 {
  21         while (*p && isspace(*p))
  22                 p++;
  23         return p;
  24 }
  25
  26 static char *nsskip(char *p)
  27 {
  28         while (*p && !isspace(*p))
  29                 p++;
  30         return p;
  31 }
  32
  33 static int check_token(char **p_, const char *token)
  34 {
  35         char *p = *p_;
  36         int tlen = strlen(token);
  37         int ret = strncasecmp(p, token, tlen) == 0 && isspace(p[tlen]);
  38         if (ret)
  39                 *p_ = sskip(p + tlen + 1);
  40
  41         return ret;
  42 }
  43
  44 static int check_token_eq(char **p_, const char *token)
  45 {
  46         char *p = *p_;
  47         int ret = check_token(&p, token);
  48         ret = ret && *p == '=';
  49         if (ret)
  50                 *p_ = sskip(p + 1);
  51
  52         return ret;
  53 }
  54
  55 void omapsdl_config(void)
  56 {
  57         char buff[256];
  58         FILE *f;
  59
  60         f = fopen("omapsdl.cfg", "r");
  61         if (f == NULL)
  62                 return;
  63
  64         while (!feof(f)) {
  65                 char *p, *line = fgets(buff, sizeof(buff), f);
  66                 if (line == NULL)
  67                         break;
  68                 p = line = sskip(line);
  69                 if (*p == 0 || *p == '#')
  70                         continue;
  71
  72                 if (check_token(&p, "bind")) {
  73                         char *key, *key_end, *sdlkey, *sdlkey_end;
  74                         key = p;
  75                         key_end = nsskip(key);
  76                         p = sskip(key_end);
  77                         if (*p != '=')
  78                                 goto bad;
  79                         sdlkey = sskip(p + 1);
  80                         sdlkey_end = nsskip(sdlkey);
  81                         p = sskip(sdlkey_end);
  82                         if (*key == 0 || *sdlkey == 0 || *p != 0)
  83                                 goto bad;
  84                         *key_end = *sdlkey_end = 0;
  85
  86                         omapsdl_input_bind(key, sdlkey);
  87                         continue;
  88                 }
  89                 else if (check_token_eq(&p, "force_vsync")) {
  90                         gcfg_force_vsync = strtol(p, NULL, 0);
  91                         continue;
  92                 }
  93                 else if (check_token_eq(&p, "force_doublebuf")) {
  94                         gcfg_force_doublebuf = strtol(p, NULL, 0);
  95                         continue;
  96                 }
  97
  98 bad:
  99                 err("config: failed to parse: %s", line);
 100         }
 101         fclose(f);
 102 }
 103
 104 void omapsdl_config_from_env(void)
 105 {
 106         const char *tmp;
 107
 108         tmp = getenv("SDL_OMAP_VSYNC");
 109         if (tmp != NULL)
 110                 gcfg_force_vsync = strtol(tmp, NULL, 0);
 111         tmp = getenv("SDL_OMAP_FORCE_DOUBLEBUF");
 112         if (tmp != NULL)
 113                 gcfg_force_doublebuf = strtol(tmp, NULL, 0);
 114 }
 115