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Add full examples to g_ptr_array_sort() and g_ptr_array_sort_with_data()

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With changes by Emmanuel Fleury and Philip Withnall.

Closes issue #9
This commit is contained in:
Lee Bigelow 2019-08-01 10:30:01 +02:00 committed by Philip Withnall
parent c08e7b9364
commit 52c130f888
1 changed files with 72 additions and 2 deletions
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74
glib/garray.c
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@ -1795,7 +1795,32 @@ g_ptr_array_insert (GPtrArray *array,
*
* Note that the comparison function for g_ptr_array_sort() doesn't
* take the pointers from the array as arguments, it takes pointers to
* the pointers in the array.
* the pointers in the array. Here is a full example of usage:
*
* |[<!-- language="C" -->
* typedef struct
* {
* gchar *name;
* gint size;
* } FileListEntry;
*
* static gint
* sort_filelist (gconstpointer a, gconstpointer b)
* {
* const FileListEntry *entry1 = *((FileListEntry **) a);
* const FileListEntry *entry2 = *((FileListEntry **) b);
*
* return g_ascii_strcasecmp (entry1->name, entry2->name);
* }
*
* …
* g_autoptr (GPtrArray) file_list = NULL;
*
* // initialize file_list array and load with many FileListEntry entries
* ...
* // now sort it with
* g_ptr_array_sort (file_list, (GCompareFunc) sort_filelist);
* ]|
*
* This is guaranteed to be a stable sort since version 2.32.
*/
@ -1824,7 +1849,52 @@ g_ptr_array_sort (GPtrArray *array,
*
* Note that the comparison function for g_ptr_array_sort_with_data()
* doesn't take the pointers from the array as arguments, it takes
* pointers to the pointers in the array.
* pointers to the pointers in the array. Here is a full example of use:
*
* |[<!-- language="C" -->
* typedef enum { SORT_NAME, SORT_SIZE } SortMode;
*
* typedef struct
* {
* gchar *name;
* gint size;
* } FileListEntry;
*
* static gint
* sort_filelist (gconstpointer a, gconstpointer b, gpointer user_data)
* {
* gint order;
* const SortMode *sort_mode = GPOINTER_TO_INT (user_data);
* const FileListEntry *entry1 = *((FileListEntry **) a);
* const FileListEntry *entry2 = *((FileListEntry **) b);
*
* switch (*sort_mode)
* {
* case SORT_NAME:
* order = g_ascii_strcasecmp (entry1->name, entry2->name);
* break;
* case SORT_SIZE:
* order = entry1->size - entry2->size;
* break;
* default:
* order = 0;
* break;
* }
* return order;
* }
*
* ...
* g_autoptr (GPtrArray) file_list = NULL;
* SortMode sort_mode;
*
* // initialize file_list array and load with many FileListEntry entries
* ...
* // now sort it with
* sort_mode = SORT_NAME;
* g_ptr_array_sort_with_data (file_list,
* (GCompareFunc) sort_filelist,
* GINT_TO_POINTER (sort_mode));
* ]|
*
* This is guaranteed to be a stable sort since version 2.32.
*/