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/*
* Ȥ줿ƥȤ鸡Ԥ
*/
/*
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 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
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <anthy/filemap.h>
#include <anthy/textdict.h>
#include "dic_main.h"
struct textdict {
char *fn;
char *ptr;
struct filemapping *mapping;
};
struct textdict *
anthy_textdict_open(const char *fn, int create)
{
struct textdict *td = malloc(sizeof(struct textdict));
if (!td) {
return NULL;
}
td->fn = strdup(fn);
if (!td->fn) {
free(td);
return NULL;
}
td->mapping = NULL;
return td;
}
static void
unmap(struct textdict *td)
{
if (td->mapping) {
anthy_munmap(td->mapping);
td->mapping = NULL;
}
}
void
anthy_textdict_close(struct textdict *td)
{
if (!td) {
return ;
}
unmap(td);
free(td->fn);
free(td);
}
static int
update_mapping(struct textdict *td)
{
if (td->mapping) {
anthy_munmap(td->mapping);
}
td->mapping = anthy_mmap(td->fn, 1);
if (!td->mapping) {
td->ptr = NULL;
return 1;
}
td->ptr = anthy_mmap_address(td->mapping);
return 0;
}
static int
expand_file(struct textdict *td, int len)
{
FILE *fp;
char buf[256];
int c;
fp = fopen(td->fn, "a+");
if (!fp) {
return -1;
}
memset(buf, '\n', 256);
c = 1;
if (len > 256) {
c *= fwrite(buf, 256, len / 256, fp);
}
if (len % 256) {
c *= fwrite(buf, len % 256, 1, fp);
}
fclose(fp);
if (c == 0) {
return -1;
}
return 0;
}
void
anthy_textdict_scan(struct textdict *td, int offset, void *ptr,
int (*fun)(void *, int, const char *, const char *))
{
FILE *fp;
char buf[1024];
if (!td) {
return ;
}
fp = fopen(td->fn, "r");
if (!fp) {
return ;
}
if (fseek(fp, offset, SEEK_SET)) {
fclose(fp);
return ;
}
while (fgets(buf, 1024, fp)) {
char *p = strchr(buf, ' ');
int len, r;
len = strlen(buf);
offset += len;
buf[len - 1] = 0;
if (!p) {
continue;
}
*p = 0;
p++;
while (*p == ' ') {
p++;
}
/* call it */
r = fun(ptr, offset, buf, p);
if (r) {
break;
}
}
fclose(fp);
}
int
anthy_textdict_delete_line(struct textdict *td, int offset)
{
FILE *fp;
char buf[1024];
int len, size;
fp = fopen(td->fn, "r");
if (!fp) {
return -1;
}
if (fseek(fp, offset, SEEK_SET)) {
fclose(fp);
return -1;
}
if (!fgets(buf, 1024, fp)) {
fclose(fp);
return -1;
}
len = strlen(buf);
fclose(fp);
update_mapping(td);
if (!td->mapping) {
return -1;
}
size = anthy_mmap_size(td->mapping);
memmove(&td->ptr[offset], &td->ptr[offset+len], size - offset - len);
unmap(td);
if (size - len == 0) {
unlink(td->fn);
return 0;
}
truncate(td->fn, size - len);
return 0;
}
int
anthy_textdict_insert_line(struct textdict *td, int offset,
const char *line)
{
int len = strlen(line);
int size;
if (!td) {
return -1;
}
if (expand_file(td, len)) {
return -1;
}
update_mapping(td);
size = anthy_mmap_size(td->mapping);
memmove(&td->ptr[offset+len], &td->ptr[offset], size - offset - len);
memcpy(&td->ptr[offset], line, len);
return 0;
}
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