mirror of
https://github.com/openstreetmap/mod_tile.git
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111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* Copyright (c) 2007 - 2023 by mod_tile contributors (see AUTHORS file)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; If not, see http://www.gnu.org/licenses/.
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*/
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#include <glib.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "g_logger.h"
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#include "store.h"
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#include "store_null.h"
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static int tile_read(struct storage_backend * store,
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const char *xmlconfig,
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const char *options,
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int x, int y, int z,
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char *buf, size_t sz,
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int * compressed, char * err_msg)
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{
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snprintf(err_msg, PATH_MAX - 1, "Cannot read from NULL storage.");
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return -1;
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}
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static struct stat_info tile_stat(struct storage_backend * store,
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const char *xmlconfig,
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const char *options,
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int x, int y, int z)
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{
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struct stat_info tile_stat;
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tile_stat.size = -1;
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tile_stat.atime = 0;
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tile_stat.mtime = 0;
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tile_stat.ctime = 0;
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tile_stat.expired = 1;
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return tile_stat;
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}
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static int metatile_write(struct storage_backend * store,
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const char *xmlconfig,
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const char *options,
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int x, int y, int z,
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const char *buf, int sz)
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{
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// fake like we actually wrote the tile, but we didn't...
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return sz;
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}
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static int metatile_delete(struct storage_backend * store,
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const char *xmlconfig,
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int x, int y, int z)
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{
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return 0;
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}
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static int metatile_expire(struct storage_backend * store,
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const char *xmlconfig,
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int x, int y, int z)
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{
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return 0;
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}
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static char * tile_storage_id(struct storage_backend * store,
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const char *xmlconfig,
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const char *options,
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int x, int y, int z,
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char * string)
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{
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snprintf(string, PATH_MAX - 1, "null://");
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return string;
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}
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static int close_storage(struct storage_backend * store)
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{
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return 0;
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}
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struct storage_backend *init_storage_null()
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{
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struct storage_backend *store = malloc(sizeof * store);
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if (store == NULL) {
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g_logger(G_LOG_LEVEL_ERROR, "init_storage_null: Failed to allocate memory for storage backend");
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return NULL;
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}
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store->storage_ctx = NULL;
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store->tile_read = &tile_read;
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store->tile_stat = &tile_stat;
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store->metatile_write = &metatile_write;
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store->metatile_delete = &metatile_delete;
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store->metatile_expire = &metatile_expire;
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store->tile_storage_id = &tile_storage_id;
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store->close_storage = &close_storage;
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return store;
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}
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