forked from AuroraMiddleware/gtk
bdbafe63f9
Instead of having the IconTheme have a hashtable that owns individual strings and then IconThemeDirSize have a similar hash (but with the strings owned by the other hash), we have a consecutive memory chunks where we store the icon names and then the hashtable has pointers into this. This means we can avoid a bunch of individual strdup()s in a way that is less fragmented and wastes less space. Additionally, since we do an initial lookup anyway we have the internalized icon name during lookup which means we can use g_direct_hash/equal instead of g_str_hash/equal making the lookup faster too.
273 lines
7.2 KiB
C
273 lines
7.2 KiB
C
/* gtkiconcache.c
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* Copyright (C) 2004 Anders Carlsson <andersca@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkdebug.h"
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#include "gtkiconcacheprivate.h"
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#include "gtkiconcachevalidatorprivate.h"
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#include <glib/gstdio.h>
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#include <gdk-pixbuf/gdk-pixdata.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef G_OS_WIN32
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#include <io.h>
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#endif
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#ifndef _O_BINARY
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#define _O_BINARY 0
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#endif
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#define GET_UINT16(cache, offset) (GUINT16_FROM_BE (*(guint16 *)((cache) + (offset))))
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#define GET_UINT32(cache, offset) (GUINT32_FROM_BE (*(guint32 *)((cache) + (offset))))
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struct _GtkIconCache {
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gint ref_count;
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GMappedFile *map;
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gchar *buffer;
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guint32 last_chain_offset;
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};
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GtkIconCache *
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gtk_icon_cache_ref (GtkIconCache *cache)
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{
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cache->ref_count++;
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return cache;
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}
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void
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gtk_icon_cache_unref (GtkIconCache *cache)
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{
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cache->ref_count --;
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if (cache->ref_count == 0)
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{
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GTK_NOTE (ICONTHEME, g_message ("unmapping icon cache"));
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if (cache->map)
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g_mapped_file_unref (cache->map);
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g_free (cache);
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}
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}
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GtkIconCache *
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gtk_icon_cache_new_for_path (const gchar *path)
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{
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GtkIconCache *cache = NULL;
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GMappedFile *map;
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gchar *cache_filename;
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gint fd = -1;
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GStatBuf st;
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GStatBuf path_st;
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/* Check if we have a cache file */
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cache_filename = g_build_filename (path, "icon-theme.cache", NULL);
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GTK_NOTE (ICONTHEME, g_message ("look for icon cache in %s", path));
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if (g_stat (path, &path_st) < 0)
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goto done;
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/* Open the file and map it into memory */
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fd = g_open (cache_filename, O_RDONLY|_O_BINARY, 0);
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if (fd < 0)
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goto done;
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#ifdef G_OS_WIN32
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/* Bug 660730: _fstat32 is only defined in msvcrt80.dll+/VS 2005+ */
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/* or possibly in the msvcrt.dll linked to by the Windows DDK */
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/* (will need to check on the Windows DDK part later) */
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#if ((defined (_MSC_VER) && (_MSC_VER >= 1400 || __MSVCRT_VERSION__ >= 0x0800)) || defined (__MINGW64_VERSION_MAJOR)) && !defined(_WIN64)
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#undef fstat /* Just in case */
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#define fstat _fstat32
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#endif
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#endif
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if (fstat (fd, &st) < 0 || st.st_size < 4)
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goto done;
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/* Verify cache is uptodate */
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if (st.st_mtime < path_st.st_mtime)
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{
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GTK_NOTE (ICONTHEME, g_message ("icon cache outdated"));
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goto done;
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}
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map = g_mapped_file_new (cache_filename, FALSE, NULL);
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if (!map)
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goto done;
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#ifdef G_ENABLE_DEBUG
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if (GTK_DEBUG_CHECK (ICONTHEME))
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{
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CacheInfo info;
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info.cache = g_mapped_file_get_contents (map);
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info.cache_size = g_mapped_file_get_length (map);
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info.n_directories = 0;
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info.flags = CHECK_OFFSETS|CHECK_STRINGS;
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if (!gtk_icon_cache_validate (&info))
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{
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g_mapped_file_unref (map);
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g_warning ("Icon cache '%s' is invalid", cache_filename);
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goto done;
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}
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}
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#endif
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GTK_NOTE (ICONTHEME, g_message ("found icon cache for %s", path));
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cache = g_new0 (GtkIconCache, 1);
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cache->ref_count = 1;
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cache->map = map;
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cache->buffer = g_mapped_file_get_contents (map);
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done:
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g_free (cache_filename);
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if (fd >= 0)
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close (fd);
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return cache;
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}
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GtkIconCache *
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gtk_icon_cache_new (const gchar *data)
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{
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GtkIconCache *cache;
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cache = g_new0 (GtkIconCache, 1);
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cache->ref_count = 1;
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cache->map = NULL;
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cache->buffer = (gchar *)data;
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return cache;
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}
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static gint
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get_directory_index (GtkIconCache *cache,
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const gchar *directory)
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{
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guint32 dir_list_offset;
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gint n_dirs;
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gint i;
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dir_list_offset = GET_UINT32 (cache->buffer, 8);
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n_dirs = GET_UINT32 (cache->buffer, dir_list_offset);
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for (i = 0; i < n_dirs; i++)
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{
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guint32 name_offset = GET_UINT32 (cache->buffer, dir_list_offset + 4 + 4 * i);
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gchar *name = cache->buffer + name_offset;
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if (strcmp (name, directory) == 0)
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return i;
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}
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return -1;
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}
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GHashTable *
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gtk_icon_cache_list_icons_in_directory (GtkIconCache *cache,
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const gchar *directory,
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GtkStringSet *set)
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{
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gint directory_index;
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guint32 hash_offset, n_buckets;
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guint32 chain_offset;
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guint32 image_list_offset, n_images;
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int i, j;
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GHashTable *icons = NULL;
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directory_index = get_directory_index (cache, directory);
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if (directory_index == -1)
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return NULL;
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hash_offset = GET_UINT32 (cache->buffer, 4);
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n_buckets = GET_UINT32 (cache->buffer, hash_offset);
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for (i = 0; i < n_buckets; i++)
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{
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chain_offset = GET_UINT32 (cache->buffer, hash_offset + 4 + 4 * i);
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while (chain_offset != 0xffffffff)
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{
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guint32 flags = 0;
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image_list_offset = GET_UINT32 (cache->buffer, chain_offset + 8);
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n_images = GET_UINT32 (cache->buffer, image_list_offset);
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for (j = 0; j < n_images; j++)
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{
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if (GET_UINT16 (cache->buffer, image_list_offset + 4 + 8 * j) ==
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directory_index)
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{
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flags = GET_UINT16 (cache->buffer, image_list_offset + 4 + 8 * j + 2);
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break;
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}
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}
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if (flags != 0)
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{
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guint32 name_offset = GET_UINT32 (cache->buffer, chain_offset + 4);
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const char *name = cache->buffer + name_offset;
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const char *interned_name;
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guint32 hash_flags = 0;
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/* Icons named foo.symbolic.png are stored in the cache as "foo.symbolic" with ICON_CACHE_FLAG_PNG,
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* but we convert it internally to ICON_CACHE_FLAG_SYMBOLIC_PNG.
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* Otherwise we use the same enum values and names as on disk. */
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if (g_str_has_suffix (name, ".symbolic") && (flags & ICON_CACHE_FLAG_PNG_SUFFIX) != 0)
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{
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char *converted_name = g_strndup (name, strlen (name) - 9);
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interned_name = gtk_string_set_add (set, converted_name);
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g_free (converted_name);
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flags |= ICON_CACHE_FLAG_SYMBOLIC_PNG_SUFFIX;
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flags &= ~ICON_CACHE_FLAG_PNG_SUFFIX;
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}
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else
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interned_name = gtk_string_set_add (set, name);
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if (!icons)
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icons = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, NULL);
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hash_flags = GPOINTER_TO_INT (g_hash_table_lookup (icons, interned_name));
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g_hash_table_replace (icons, (char *)interned_name, GUINT_TO_POINTER (hash_flags|flags));
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}
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chain_offset = GET_UINT32 (cache->buffer, chain_offset);
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}
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}
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return icons;
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}
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