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/* input.c: interface for input handlers
Copyright (C) 1999, 2000, 2001 Bernhard Herzog.
Copyright (C) 2003 Masatake YAMATO
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* Def: HAVE_CONFIG_H */
#include "autotrace.h"
#include "private.h"
#include "input.h"
#include "xstd.h"
#include "filename.h"
#include <string.h>
#include <glib.h>
typedef struct _at_input_format_entry at_input_format_entry;
struct _at_input_format_entry {
at_bitmap_reader reader;
const gchar *descr;
GDestroyNotify user_data_destroy_func;
};
static GHashTable *at_input_formats = NULL;
static at_input_format_entry *at_input_format_new(const char *descr, at_input_func reader, gpointer user_data, GDestroyNotify user_data_destroy_func);
static void at_input_format_free(at_input_format_entry * entry);
/*
* Helper functions
*/
static void input_list_set(gpointer key, gpointer value, gpointer user_data);
static void input_list_strlen(gpointer key, gpointer value, gpointer user_data);
static void input_list_strcat(gpointer key, gpointer value, gpointer user_data);
/**
* at_input_init:
* Initialize at_input input plugin sub system.
*
* Return value: 1 for success, else for failure
**/
int at_input_init(void)
{
if (at_input_formats)
return 1;
at_input_formats = g_hash_table_new_full(g_str_hash, (GEqualFunc) g_str_equal, g_free, (GDestroyNotify) at_input_format_free);
if (!at_input_formats)
return 0;
return 1;
}
static at_input_format_entry *at_input_format_new(const gchar * descr, at_input_func reader, gpointer user_data, GDestroyNotify user_data_destroy_func)
{
at_input_format_entry *entry;
entry = g_malloc(sizeof(at_input_format_entry));
if (entry) {
entry->reader.func = reader;
entry->reader.data = user_data;
entry->descr = g_strdup(descr);
entry->user_data_destroy_func = user_data_destroy_func;
}
return entry;
}
static void at_input_format_free(at_input_format_entry * entry)
{
g_free((gpointer) entry->descr);
if (entry->user_data_destroy_func)
entry->user_data_destroy_func(entry->reader.data);
g_free(entry);
}
int at_input_add_handler(const gchar * suffix, const gchar * description, at_input_func reader)
{
return at_input_add_handler_full(suffix, description, reader, 0, NULL, NULL);
}
int at_input_add_handler_full(const gchar * suffix, const gchar * description, at_input_func reader, gboolean override, gpointer user_data, GDestroyNotify user_data_destroy_func)
{
gchar *gsuffix;
const gchar *gdescription;
at_input_format_entry *old_entry;
at_input_format_entry *new_entry;
g_return_val_if_fail(suffix, 0);
g_return_val_if_fail(description, 0);
g_return_val_if_fail(reader, 0);
gsuffix = g_strdup((gchar *) suffix);
g_return_val_if_fail(gsuffix, 0);
gsuffix = g_ascii_strdown(gsuffix, strlen(gsuffix));
gdescription = (const gchar *)description;
old_entry = g_hash_table_lookup(at_input_formats, gsuffix);
if (old_entry && !override) {
g_free(gsuffix);
return 1;
}
new_entry = at_input_format_new(gdescription, reader, user_data, user_data_destroy_func);
g_return_val_if_fail(new_entry, 0);
g_hash_table_replace(at_input_formats, gsuffix, new_entry);
return 1;
}
at_bitmap_reader *at_input_get_handler(gchar * filename)
{
char *ext = find_suffix(filename);
if (ext == NULL)
ext = "";
return at_input_get_handler_by_suffix(ext);
}
at_bitmap_reader *at_input_get_handler_by_suffix(gchar * suffix)
{
at_input_format_entry *format;
gchar *gsuffix;
if (!suffix || suffix[0] == '\0')
return NULL;
gsuffix = g_strdup(suffix);
g_return_val_if_fail(gsuffix, NULL);
gsuffix = g_ascii_strdown(gsuffix, strlen(gsuffix));
format = g_hash_table_lookup(at_input_formats, gsuffix);
g_free(gsuffix);
if (format)
return &(format->reader);
else
return NULL;
}
const char **at_input_list_new(void)
{
char **list, **tmp;
gint format_count;
gint list_count;
format_count = g_hash_table_size(at_input_formats);
list_count = 2 * format_count;
list = g_new(gchar *, list_count + 1);
list[list_count] = NULL;
tmp = list;
g_hash_table_foreach(at_input_formats, input_list_set, &tmp);
return (const char **)list;
}
void at_input_list_free(const char **list)
{
free((char **)list);
}
char *at_input_shortlist(void)
{
gint length = 0, count;
char *list, *tmp;
g_hash_table_foreach(at_input_formats, input_list_strlen, &length);
count = g_hash_table_size(at_input_formats);
/* 2 for ", " */
length += (2 * count);
list = g_malloc(length + 1);
list[0] = '\0';
tmp = list;
g_hash_table_foreach(at_input_formats, input_list_strcat, &tmp);
/* remove final ", " */
g_return_val_if_fail(list[length - 2] == ',', NULL);
list[length - 2] = '\0';
return list;
}
static void input_list_set(gpointer key, gpointer value, gpointer user_data)
{
at_input_format_entry *format = value;
const char ***list_ptr = user_data;
const char **list = *list_ptr;
list[0] = key;
list[1] = format->descr;
*list_ptr = &(list[2]);
}
static void input_list_strlen(gpointer key, gpointer value, gpointer user_data)
{
gint *length;
g_return_if_fail(key);
g_return_if_fail(user_data);
length = user_data;
*length += strlen(key);
}
static void input_list_strcat(gpointer key, gpointer value, gpointer user_data)
{
gchar **list_ptr;
gchar *list;
list_ptr = user_data;
list = *list_ptr;
strcat(list, key);
strcat(list, ", ");
/* 2 for ", " */
*list_ptr = list + strlen(key) + 2;
}
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