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                 if (! fscanf(f, "%s", key))
  19                         break;
  20
  21                 bool found = false;
  22                 for (size_t i = 0; i < num_entries; i++) {
  23                         ConfigEntry *entry = &entries[i];
  24                         if (strcmp(key, entry->key) == 0) {
  25                                 bool valid = false;
  26
  27                                 switch (entry->type) {
  28                                         case CT_STRING: {
  29                                                 char value[BUFSIZ];
  30
  31                                                 if (! fscanf(f, "%s", value))
  32                                                         break;
  33
  34                                                 valid = true;
  35                                                 *(char **) entry->value = strdup(value);
  36                                         } break;
  37
  38                                         case CT_INT:
  39                                                 if (fscanf(f, "%d", (int *) entry->value))
  40                                                         valid = true;
  41
  42                                                 break;
  43
  44                                         case CT_UINT:
  45                                                 if (fscanf(f, "%u", (unsigned int *) entry->value))
  46                                                         valid = true;
  47
  48                                                 break;
  49
  50                                         case CT_FLOAT:
  51                                                 if (fscanf(f, "%lf", (double *) entry->value))
  52                                                         valid = true;
  53
  54                                                 break;
  55
  56                                         case CT_BOOL: {
  57                                                 char value[BUFSIZ];
  58
  59                                                 if (! fscanf(f, "%s", value))
  60                                                         break;
  61
  62                                                 valid = true;
  63
  64                                                 if (strcmp(value, "on") == 0 || strcmp(value, "yes") == 0 || strcmp(value, "true") == 0)
  65                                                         *(bool *) entry->value = true;
  66                                                 else if (strcmp(value, "off") == 0 || strcmp(value, "no") == 0 || strcmp(value, "false") == 0)
  67                                                         *(bool *) entry->value = false;
  68                                                 else
  69                                                         valid = false;
  70
  71                                         } break;
  72                                 }
  73
  74                                 if (! valid)
  75                                         fprintf(stderr, "Invalid value for setting %s in %s\n", key, path);
  76
  77                                 found = true;
  78                                 break;
  79                         }
  80                 }
  81
  82                 if (! found)
  83                         fprintf(stderr, "Unknown setting %s in %s\n", key, path);
  84         }
  85 }