src/config.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <stdbool.h>
   5 #include "config.h"
   6
   7 void config_read(char *path, ConfigEntry *entries, size_t num_entries)
   8 {
   9         FILE *f = fopen(path, "r");
  10
  11         if (! f)
  12                 return;
  13
  14         printf("Reading config from %s\n", path);
  15
  16         while (! feof(f)) {
  17                 char key[BUFSIZ];
  18                 fscanf(f, "%s", key);
  19
  20                 bool found = false;
  21                 for (size_t i = 0; i < num_entries; i++) {
  22                         ConfigEntry *entry = &entries[i];
  23                         if (strcmp(key, entry->key) == 0) {
  24                                 bool valid = false;
  25
  26                                 switch (entry->type) {
  27                                         case CT_STRING: {
  28                                                 char value[BUFSIZ];
  29
  30                                                 if (! fscanf(f, "%s", value))
  31                                                         break;
  32
  33                                                 valid = true;
  34                                                 *(char **) entry->value = strdup(value);
  35                                         } break;
  36
  37                                         case CT_INT:
  38                                                 if (fscanf(f, "%d", (int *) entry->value))
  39                                                         valid = true;
  40
  41                                                 break;
  42
  43                                         case CT_UINT:
  44                                                 if (fscanf(f, "%u", (unsigned int *) entry->value))
  45                                                         valid = true;
  46
  47                                                 break;
  48
  49                                         case CT_FLOAT:
  50                                                 if (fscanf(f, "%lf", (double *) entry->value))
  51                                                         valid = true;
  52
  53                                                 break;
  54
  55                                         case CT_BOOL: {
  56                                                 char value[BUFSIZ];
  57
  58                                                 if (! fscanf(f, "%s", value))
  59                                                         break;
  60
  61                                                 valid = true;
  62
  63                                                 if (strcmp(value, "on") == 0 || strcmp(value, "yes") == 0 || strcmp(value, "true") == 0)
  64                                                         *(bool *) entry->value = true;
  65                                                 else if (strcmp(value, "off") == 0 || strcmp(value, "no") == 0 || strcmp(value, "false") == 0)
  66                                                         *(bool *) entry->value = false;
  67                                                 else
  68                                                         valid = false;
  69
  70                                         } break;
  71                                 }
  72
  73                                 if (! valid)
  74                                         fprintf(stderr, "Invalid value for setting %s in %s\n", key, path);
  75
  76                                 found = true;
  77                                 break;
  78                         }
  79                 }
  80
  81                 if (! found)
  82                         fprintf(stderr, "Unknown setting %s in %s\n", key, path);
  83         }
  84 }