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glib-local: add local glib functions

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While adding the configure enhancements, I forgot to stage the glib-local
changes, so they weren't pushed.  This patch adds them

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
This commit is contained in:
Serj Kalichev 2012-03-26 11:04:13 -04:00 committed by Neil Horman
parent 063c2a4dff
commit cf1f948422
4 changed files with 446 additions and 0 deletions
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8
glib-local/Makefile.am Normal file
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## Process this file with automake to produce Makefile.in
noinst_LIBRARIES = libglib.a
libglib_a_SOURCES = glist.c
libglib_a_CFLAGS = @GLIB_CFLAGS@
noinst_HEADERS = glib.h glist.h

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glib-local/glib.h Normal file
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#include <glist.h>

381
glib-local/glist.c Normal file
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#include <stdlib.h>
#include "glist.h"
/**
* g_list_free:
* @list: a #GList
*
* Frees all of the memory used by a #GList.
* The freed elements are returned to the slice allocator.
*
* <note><para>
* If list elements contain dynamically-allocated memory,
* you should either use g_list_free_full() or free them manually
* first.
* </para></note>
*/
void
g_list_free (GList *list)
{
GList *l = list;
while(l) {
GList *tmp = l->next;
free(l);
l = tmp;
}
}
/**
* g_list_last:
* @list: a #GList
*
* Gets the last element in a #GList.
*
* Returns: the last element in the #GList,
* or %NULL if the #GList has no elements
*/
GList*
g_list_last (GList *list)
{
if (list)
{
while (list->next)
list = list->next;
}
return list;
}
/**
* g_list_append:
* @list: a pointer to a #GList
* @data: the data for the new element
*
* Adds a new element on to the end of the list.
*
* <note><para>
* The return value is the new start of the list, which
* may have changed, so make sure you store the new value.
* </para></note>
*
* <note><para>
* Note that g_list_append() has to traverse the entire list
* to find the end, which is inefficient when adding multiple
* elements. A common idiom to avoid the inefficiency is to prepend
* the elements and reverse the list when all elements have been added.
* </para></note>
*
* |[
* /&ast; Notice that these are initialized to the empty list. &ast;/
* GList *list = NULL, *number_list = NULL;
*
* /&ast; This is a list of strings. &ast;/
* list = g_list_append (list, "first");
* list = g_list_append (list, "second");
*
* /&ast; This is a list of integers. &ast;/
* number_list = g_list_append (number_list, GINT_TO_POINTER (27));
* number_list = g_list_append (number_list, GINT_TO_POINTER (14));
* ]|
*
* Returns: the new start of the #GList
*/
GList*
g_list_append (GList *list,
gpointer data)
{
GList *new_list;
GList *last;
new_list = malloc(sizeof(*new_list));
new_list->data = data;
new_list->next = NULL;
if (list)
{
last = g_list_last (list);
/* g_assert (last != NULL); */
last->next = new_list;
new_list->prev = last;
return list;
}
else
{
new_list->prev = NULL;
return new_list;
}
}
static inline GList*
_g_list_remove_link (GList *list,
GList *link)
{
if (link)
{
if (link->prev)
link->prev->next = link->next;
if (link->next)
link->next->prev = link->prev;
if (link == list)
list = list->next;
link->next = NULL;
link->prev = NULL;
}
return list;
}
/**
* g_list_delete_link:
* @list: a #GList
* @link_: node to delete from @list
*
* Removes the node link_ from the list and frees it.
* Compare this to g_list_remove_link() which removes the node
* without freeing it.
*
* Returns: the new head of @list
*/
GList*
g_list_delete_link (GList *list,
GList *link_)
{
list = _g_list_remove_link (list, link_);
free (link_);
return list;
}
/**
* g_list_first:
* @list: a #GList
*
* Gets the first element in a #GList.
*
* Returns: the first element in the #GList,
* or %NULL if the #GList has no elements
*/
GList*
g_list_first (GList *list)
{
if (list)
{
while (list->prev)
list = list->prev;
}
return list;
}
static GList *
g_list_sort_merge (GList *l1,
GList *l2,
GFunc compare_func,
gpointer user_data)
{
GList list, *l, *lprev;
gint cmp;
l = &list;
lprev = NULL;
while (l1 && l2)
{
cmp = ((GCompareDataFunc) compare_func) (l1->data, l2->data, user_data);
if (cmp <= 0)
{
l->next = l1;
l1 = l1->next;
}
else
{
l->next = l2;
l2 = l2->next;
}
l = l->next;
l->prev = lprev;
lprev = l;
}
l->next = l1 ? l1 : l2;
l->next->prev = l;
return list.next;
}
static GList*
g_list_sort_real (GList *list,
GFunc compare_func,
gpointer user_data)
{
GList *l1, *l2;
if (!list)
return NULL;
if (!list->next)
return list;
l1 = list;
l2 = list->next;
while ((l2 = l2->next) != NULL)
{
if ((l2 = l2->next) == NULL)
break;
l1 = l1->next;
}
l2 = l1->next;
l1->next = NULL;
return g_list_sort_merge (g_list_sort_real (list, compare_func, user_data),
g_list_sort_real (l2, compare_func, user_data),
compare_func,
user_data);
}
/**
* g_list_sort:
* @list: a #GList
* @compare_func: the comparison function used to sort the #GList.
* This function is passed the data from 2 elements of the #GList
* and should return 0 if they are equal, a negative value if the
* first element comes before the second, or a positive value if
* the first element comes after the second.
*
* Sorts a #GList using the given comparison function.
*
* Returns: the start of the sorted #GList
*/
/**
* GCompareFunc:
* @a: a value.
* @b: a value to compare with.
* @Returns: negative value if @a &lt; @b; zero if @a = @b; positive
* value if @a > @b.
*
* Specifies the type of a comparison function used to compare two
* values. The function should return a negative integer if the first
* value comes before the second, 0 if they are equal, or a positive
* integer if the first value comes after the second.
**/
GList *
g_list_sort (GList *list,
GCompareFunc compare_func)
{
return g_list_sort_real (list, (GFunc) compare_func, NULL);
}
/**
* g_list_length:
* @list: a #GList
*
* Gets the number of elements in a #GList.
*
* <note><para>
* This function iterates over the whole list to
* count its elements.
* </para></note>
*
* Returns: the number of elements in the #GList
*/
guint
g_list_length (GList *list)
{
guint length;
length = 0;
while (list)
{
length++;
list = list->next;
}
return length;
}
/**
* g_list_foreach:
* @list: a #GList
* @func: the function to call with each element's data
* @user_data: user data to pass to the function
*
* Calls a function for each element of a #GList.
*/
/**
* GFunc:
* @data: the element's data.
* @user_data: user data passed to g_list_foreach() or
* g_slist_foreach().
*
* Specifies the type of functions passed to g_list_foreach() and
* g_slist_foreach().
**/
void
g_list_foreach (GList *list,
GFunc func,
gpointer user_data)
{
while (list)
{
GList *next = list->next;
(*func) (list->data, user_data);
list = next;
}
}
/**
* g_list_free_full:
* @list: a pointer to a #GList
* @free_func: the function to be called to free each element's data
*
* Convenience method, which frees all the memory used by a #GList, and
* calls the specified destroy function on every element's data.
*
* Since: 2.28
*/
void
g_list_free_full (GList *list,
GDestroyNotify free_func)
{
g_list_foreach (list, (GFunc) free_func, NULL);
g_list_free (list);
}
/**
* g_list_find_custom:
* @list: a #GList
* @data: user data passed to the function
* @func: the function to call for each element.
* It should return 0 when the desired element is found
*
* Finds an element in a #GList, using a supplied function to
* find the desired element. It iterates over the list, calling
* the given function which should return 0 when the desired
* element is found. The function takes two #gconstpointer arguments,
* the #GList element's data as the first argument and the
* given user data.
*
* Returns: the found #GList element, or %NULL if it is not found
*/
GList*
g_list_find_custom (GList *list,
gconstpointer data,
GCompareFunc func)
{
g_return_val_if_fail (func != NULL, list);
while (list)
{
if (! func (list->data, data))
return list;
list = list->next;
}
return NULL;
}

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#ifndef __G_LIST_H__
#define __G_LIST_H__
typedef int gint;
typedef unsigned int guint;
typedef void* gpointer;
typedef const void *gconstpointer;
typedef gint (*GCompareFunc) (gconstpointer a,
gconstpointer b);
typedef gint (*GCompareDataFunc) (gconstpointer a,
gconstpointer b,
gpointer user_data);
typedef void (*GFunc) (gpointer data,
gpointer user_data);
typedef void (*GDestroyNotify) (gpointer data);
struct _GList;
typedef struct _GList GList;
struct _GList
{
gpointer data;
GList *next;
GList *prev;
};
/* Doubly linked lists
*/
void g_list_free (GList *list);
GList* g_list_append (GList *list,
gpointer data);
GList* g_list_delete_link (GList *list,
GList *link_);
GList* g_list_first (GList *list);
GList* g_list_sort (GList *list,
GCompareFunc compare_func);
guint g_list_length (GList *list);
void g_list_foreach (GList *list,
GFunc func,
gpointer user_data);
void g_list_free_full (GList *list,
GDestroyNotify free_func);
GList* g_list_find_custom (GList *list,
gconstpointer data,
GCompareFunc func);
#define g_list_previous(list) ((list) ? (((GList *)(list))->prev) : NULL)
#define g_list_next(list) ((list) ? (((GList *)(list))->next) : NULL)
#define g_return_val_if_fail(expr,val) do { \
if (expr) { } else \
{ \
return (val); \
} } while(0);
#endif /* __G_LIST_H__ */