git.mutantstargoat.com Git - libgliar/blob - src/cfg.c

   1 /*
   2 libgliar - a library that can fake the OpenGL context info returned by
   3 the glGet OpenGL calls
   4
   5 Copyright (C) 2013 Canonical Ltd
   6
   7 This program is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 Author: Eleni Maria Stea <elene.mst@gmail.com>
  21 */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include "cfg.h"
  28
  29 static char *stripspace(char *s);
  30
  31
  32 struct cfgopt *gliar_load_cfg(const char *fname)
  33 {
  34         FILE *fp;
  35         char buf[512];
  36         struct cfgopt *optlist = 0;
  37         struct cfgopt *opt = 0;
  38
  39         if(!(fp = fopen(fname, "r"))) {
  40                 return 0;
  41         }
  42
  43         while(fgets(buf, sizeof buf, fp)) {
  44                 char *line = stripspace(buf);
  45
  46                 if(!*line || *line == '#') {
  47                         continue;
  48                 }
  49
  50                 if(*line == '[') {
  51                         char *end = strrchr(line, ']');
  52                         if(!end) {
  53                                 fprintf(stderr, "invalid config %s: %s\n", fname, line);
  54                                 continue;
  55                         }
  56                         line++;
  57                         *end = 0;
  58
  59                         if(opt) {
  60                                 opt->next = optlist;
  61                                 optlist = opt;
  62                         }
  63
  64                         if((opt = malloc(sizeof *opt))) {
  65                                 if((opt->key = malloc(strlen(line) + 1))) {
  66                                         strcpy(opt->key, line);
  67                                         opt->val = 0;
  68                                 } else {
  69                                         free(opt);
  70                                         opt = 0;
  71                                 }
  72                         }
  73                 } else {
  74                         char *tmp;
  75                         int prev_len = opt->val ? strlen(opt->val) : 0;
  76
  77                         if(opt && (tmp = realloc(opt->val, prev_len + strlen(line) + 2))) {
  78                                 opt->val = tmp;
  79                                 if(prev_len) {
  80                                         strcat(opt->val, " ");
  81                                         strcat(opt->val, line);
  82                                 } else {
  83                                         strcpy(opt->val, line);
  84                                 }
  85                         }
  86                 }
  87         }
  88
  89         if(opt) {
  90                 opt->next = optlist;
  91                 optlist = opt;
  92         }
  93
  94         fclose(fp);
  95         return optlist;
  96 }
  97
  98 const char *gliar_find_opt(struct cfgopt *list, const char *name)
  99 {
 100         if(!list || !name) {
 101                 return 0;
 102         }
 103
 104         while(list) {
 105                 if(strcmp(list->key, name) == 0) {
 106                         return list->val;
 107                 }
 108                 list = list->next;
 109         }
 110         return 0;
 111 }
 112
 113 void gliar_print_opt(struct cfgopt *list)
 114 {
 115         printf("OPTIONS\n");
 116         while(list) {
 117                 printf("\"%s\" -> \"%s\"\n", list->key, list->val);
 118                 list = list->next;
 119         }
 120 }
 121
 122 static char *stripspace(char *s)
 123 {
 124         char *end = s + strlen(s) - 1;
 125
 126         while(isspace(*s)) s++;
 127
 128         while(isspace(*end)) {
 129                 *end-- = 0;
 130         }
 131         return s;
 132 }