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/*
* fontconfig/src/fcptrlist.c
*
* Copyright © 2000 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the author(s) not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "fcint.h"
typedef struct _FcPtrListEntry {
struct _FcPtrListEntry *next;
void *data;
} FcPtrListEntry;
struct _FcPtrList {
FcDestroyFunc destroy_func;
FcPtrListEntry *list;
};
typedef struct _FcPtrListIterPrivate {
const FcPtrList *list;
FcPtrListEntry *entry;
FcPtrListEntry *prev;
} FcPtrListIterPrivate;
FcPtrList *
FcPtrListCreate (FcDestroyFunc func)
{
FcPtrList *ret = (FcPtrList *) malloc (sizeof (FcPtrList));
if (ret)
{
ret->destroy_func = func;
ret->list = NULL;
}
return ret;
}
void
FcPtrListDestroy (FcPtrList *list)
{
FcPtrListIter iter;
FcPtrListIterInit (list, &iter);
do
{
if (FcPtrListIterGetValue (list, &iter))
list->destroy_func (FcPtrListIterGetValue (list, &iter));
FcPtrListIterRemove (list, &iter);
} while (FcPtrListIterIsValid (list, &iter));
free (list);
}
void
FcPtrListIterInit (const FcPtrList *list,
FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
priv->list = list;
priv->entry = list->list;
priv->prev = NULL;
}
void
FcPtrListIterInitAtLast (FcPtrList *list,
FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
FcPtrListEntry **e, **p;
e = &list->list;
p = e;
for (; *e; p = e, e = &(*e)->next);
priv->list = list;
priv->entry = *e;
priv->prev = *p;
}
FcBool
FcPtrListIterNext (const FcPtrList *list,
FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
if (list != priv->list)
return FcFalse;
priv->prev = priv->entry;
priv->entry = priv->entry->next;
return priv->entry != NULL;
}
FcBool
FcPtrListIterIsValid (const FcPtrList *list,
const FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
return list == priv->list && priv->entry;
}
void *
FcPtrListIterGetValue (const FcPtrList *list,
const FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
if (list != priv->list ||
!priv->entry)
return NULL;
return priv->entry->data;
}
FcBool
FcPtrListIterAdd (FcPtrList *list,
FcPtrListIter *iter,
void *data)
{
FcPtrListEntry *e;
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
if (list != priv->list)
return FcFalse;
e = (FcPtrListEntry *) malloc (sizeof (FcPtrListEntry));
if (!e)
return FcFalse;
e->data = data;
if (priv->entry)
{
e->next = priv->entry->next;
priv->entry->next = e;
}
else
{
e->next = NULL;
if (priv->prev)
{
priv->prev->next = e;
priv->entry = priv->prev;
}
else
{
list->list = e;
priv->entry = e;
return FcTrue;
}
}
return FcPtrListIterNext (list, iter);
}
FcBool
FcPtrListIterRemove (FcPtrList *list,
FcPtrListIter *iter)
{
FcPtrListIterPrivate *priv = (FcPtrListIterPrivate *) iter;
FcPtrListEntry *e;
if (list != priv->list)
return FcFalse;
if (!priv->entry)
return FcTrue;
if (list->list == priv->entry)
list->list = list->list->next;
e = priv->entry;
if (priv->prev)
priv->prev->next = priv->entry->next;
priv->entry = priv->entry->next;
free (e);
return FcTrue;
}
#define __fcplist__
#include "fcaliastail.h"
#undef __fcplist__
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