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/*
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Localised message support (implementation).
*
* Native language messages are loaded from a file and stored hashed by key for
* fast access.
*/
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "utils/hashtable.h"
/** We store the messages in a fixed-size hash table. */
#define HASH_SIZE 101
/** The hash table used to store the standard Messages file for the old API */
static struct hash_table *messages_hash = NULL;
/**
* Read keys and values from messages file.
*
* \param path pathname of messages file
* \param ctx struct hash_table to merge with, or NULL for a new one.
* \return struct hash_table containing the context or NULL in case of error.
*/
struct hash_table *messages_load_ctx(const char *path, struct hash_table *ctx)
{
char s[400];
FILE *fp;
assert(path != NULL);
ctx = (ctx != NULL) ? ctx : hash_create(HASH_SIZE);
if (ctx == NULL) {
LOG(("Unable to create hash table for messages file %s", path));
return NULL;
}
fp = fopen(path, "r");
if (!fp) {
snprintf(s, sizeof s, "Unable to open messages file "
"\"%.100s\": %s", path, strerror(errno));
s[sizeof s - 1] = 0;
LOG(("%s", s));
return NULL;
}
while (fgets(s, sizeof s, fp)) {
char *colon, *value;
if (s[0] == 0 || s[0] == '#')
continue;
s[strlen(s) - 1] = 0; /* remove \n at end */
colon = strchr(s, ':');
if (!colon)
continue;
*colon = 0; /* terminate key */
value = colon + 1;
if (hash_add(ctx, s, value) == false) {
LOG(("Unable to add %s:%s to hash table of %s",
s, value, path));
fclose(fp);
return NULL;
}
}
fclose(fp);
return ctx;
}
/**
* Read keys and values from messages file into the standard Messages hash.
*
* \param path pathname of messages file
*
* The messages are merged with any previously loaded messages. Any keys which
* are present already are replaced with the new value.
*
* Exits through die() in case of error.
*/
void messages_load(const char *path)
{
struct hash_table *m;
char s[400];
assert(path != NULL);
m = messages_load_ctx(path, messages_hash);
if (m == NULL) {
LOG(("Unable to open Messages file '%s'. Possible reason: %s",
path, strerror(errno)));
snprintf(s, sizeof s,
"Unable to open Messages file '%s'.", path);
die(s);
}
messages_hash = m;
}
/**
* Fast lookup of a message by key.
*
* \param key key of message
* \param ctx context of messages file to look up in
* \return value of message, or key if not found
*/
const char *messages_get_ctx(const char *key, struct hash_table *ctx)
{
const char *r;
assert(key != NULL);
/* If we're called with no context, it's nicer to return the
* key rather than explode - this allows attempts to get messages
* before messages_hash is set up to fail gracefully, for example */
if (ctx == NULL)
return key;
r = hash_get(ctx, key);
return r ? r : key;
}
/**
* Fast lookup of a message by key from the standard Messages hash.
*
* \param key key of message
* \return value of message, or key if not found
*/
const char *messages_get(const char *key)
{
return messages_get_ctx(key, messages_hash);
}
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