wine/dlls/wineps.drv/glyphlist.c

202 lines
5.3 KiB
C

/*******************************************************************************
*
* Functions and data structures used to maintain a single list of glyph
* names. The list is sorted alphabetically and each name appears only
* once. After all font information has been read, the 'index' field of
* each GLYPHNAME structure is initialized, so future sorts/searches can
* be done without comparing strings.
*
* Copyright 2001 Ian Pilcher
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <string.h>
#include "psdrv.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
#define GLYPHLIST_ALLOCSIZE 1024
static GLYPHNAME **glyphList = NULL;
static INT glyphListSize = 0;
static BOOL glyphNamesIndexed = TRUE;
/*******************************************************************************
* PSDRV_GlyphListInit
*
* Allocates initial block of memory for the glyph list and copies pointers to
* the AGL glyph names into it; returns 0 on success, 1 on failure
*
*/
INT PSDRV_GlyphListInit(void)
{
INT i;
/*
* Compute the smallest multiple of GLYPHLIST_ALLOCSIZE that is
* greater than or equal to PSDRV_AGLGlyphNamesSize
*
*/
glyphListSize = PSDRV_AGLGlyphNamesSize;
i = ((glyphListSize + GLYPHLIST_ALLOCSIZE - 1) / GLYPHLIST_ALLOCSIZE) *
GLYPHLIST_ALLOCSIZE;
TRACE("glyphList will initially hold %i glyph names\n", i);
glyphList = HeapAlloc(PSDRV_Heap, 0, i * sizeof(GLYPHNAME *));
if (glyphList == NULL) return 1;
for (i = 0; i < glyphListSize; ++i)
glyphList[i] = PSDRV_AGLGlyphNames + i;
return 0;
}
/*******************************************************************************
* GlyphListInsert
*
* Inserts a copy of the glyph name into the list at the index, growing the
* list if necessary; returns index on success (-1 on failure)
*
*/
static inline INT GlyphListInsert(LPCSTR szName, INT index)
{
GLYPHNAME *g;
g = HeapAlloc(PSDRV_Heap, 0, sizeof(GLYPHNAME) + strlen(szName) + 1);
if (g == NULL) return -1;
g->index = -1;
g->sz = (LPSTR)(g + 1);
strcpy((LPSTR)g->sz, szName);
if (glyphListSize % GLYPHLIST_ALLOCSIZE == 0) /* grow the list? */
{
GLYPHNAME **newGlyphList;
newGlyphList = HeapReAlloc(PSDRV_Heap, 0, glyphList,
(glyphListSize + GLYPHLIST_ALLOCSIZE) * sizeof(GLYPHNAME *));
if (newGlyphList == NULL)
{
HeapFree(PSDRV_Heap, 0, g);
return -1;
}
glyphList = newGlyphList;
TRACE("glyphList will now hold %i glyph names\n",
glyphListSize + GLYPHLIST_ALLOCSIZE);
}
if (index < glyphListSize)
{
memmove(glyphList + (index + 1), glyphList + index,
(glyphListSize - index) * sizeof(GLYPHNAME *));
}
glyphList[index] = g;
++glyphListSize;
glyphNamesIndexed = FALSE;
#if 0
TRACE("Added '%s' at glyphList[%i] (glyphListSize now %i)\n",
glyphList[index]->sz, index, glyphListSize);
#endif
return index;
}
/*******************************************************************************
* GlyphListSearch
*
* Searches the specified portion of the list for the glyph name and inserts it
* in the list if necessary; returns the index at which the name (now) resides
* (-1 if unable to insert it)
*
*/
static INT GlyphListSearch(LPCSTR szName, INT loIndex, INT hiIndex)
{
INT midIndex, cmpResult;
while (1)
{
if (loIndex > hiIndex)
return GlyphListInsert(szName, loIndex);
midIndex = (loIndex + hiIndex) >> 1;
cmpResult = strcmp(szName, glyphList[midIndex]->sz);
if (cmpResult == 0)
{
#if 0
TRACE("Found '%s' at glyphList[%i]\n", glyphList[midIndex]->sz,
midIndex);
#endif
return midIndex;
}
if (cmpResult < 0)
hiIndex = midIndex - 1;
else
loIndex = midIndex + 1;
}
}
/*******************************************************************************
* PSDRV_GlyphName
*
* Searches the glyph name list for the provided name, adds it to the list if
* necessary, and returns a pointer to it (NULL if unable to add it)
*
*/
const GLYPHNAME *PSDRV_GlyphName(LPCSTR szName)
{
INT index;
index = GlyphListSearch(szName, 0, glyphListSize - 1);
if (index < 0)
return NULL;
return glyphList[index];
}
/*******************************************************************************
* PSDRV_IndexGlyphList
*
* Initializes index member of all GLYPHNAME structures
*
*/
VOID PSDRV_IndexGlyphList(void)
{
INT i;
if (glyphNamesIndexed)
return;
TRACE("%i glyph names:\n", glyphListSize);
for (i = 0; i < glyphListSize; ++i)
{
glyphList[i]->index = i;
#if 0
TRACE(" glyphList[%i] -> '%s'\n", i, glyphList[i]->sz);
#endif
}
glyphNamesIndexed = TRUE;
}