The wonders of Glib

Glib is a utility for C that makes programming in C must more enjoyable.

It addresses three fundamental problematic issues C users often face:

• Data containers
  
• Portability
  
• Utility
  

Glibs provides safer and stable operations than C, e.g., g_free is much safer than free.
g_new0(num), great than malloc()

Glib provides double-linked-list, single-linked-list, hashtable and so on.

   GList *list = NULL; /* our list pointer */
  list = g_list_append(list, "foo1");
  list = g_list_append(list, "foo2");

The string operations of glib is also wrapped to be safer ...

• strcpy->g_strcpy
  
• strdup
  
• ...
  

Hash tables, the iterator
Create and destroy hash table

   GHashTable *table;
    table = g_hash_table_new(g_str_hash, g_str_equal);
    g_hash_table_destroy(table);

Insert and look up data

   FILE *fp;
  char buf[1024];

  /* just a standard way to open files */
  fp = fopen("file.txt", "r");
  if(!fp) exit(1); /* if file does not exist, exit */

  /* read, file line by line */
  while(fgets(buf, sizeof(buf), fp)) {
          char *key, *value;
          /* get the first and the second field */
          key = strtok(buf, "\t");
          if(!key) continue;
          value = strtok(NULL, "\t");
          if(!value) continue;

          /* insert into our table */
          g_hash_table_insert(table, g_strdup(key), g_strdup(value));
  }
  fclose(fp);

Some reference