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#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <anthy/diclib.h>
#include <anthy/alloc.h>
#include <anthy/conf.h>
#include <anthy/logger.h>
#include "diclib_inner.h"
/**
複数セクションがリンクされた辞書
*/
struct file_dic
{
void *ptr;
size_t size;
};
static struct file_dic fdic;
void*
anthy_file_dic_get_section(const char* section_name)
{
int i;
char* head = (char *)fdic.ptr;
int* p = (int*)head;
int entry_num = anthy_dic_ntohl(*p++);
for (i = 0; i < entry_num; ++i) {
int hash_offset = anthy_dic_ntohl(*p++);
int key_len = anthy_dic_ntohl(*p++);
int contents_offset = anthy_dic_ntohl(*p++);
if (strncmp(section_name, head + hash_offset, key_len) == 0) {
return (void*)(head + contents_offset);
}
}
return NULL;
}
static int
anthy_mmap (const char *fn)
{
int fd;
void *ptr;
struct stat st;
fd = open (fn, O_RDONLY);
if (fd == -1) {
anthy_log(0, "Failed to open (%s).\n", fn);
return -1;
}
if (fstat(fd, &st) < 0) {
anthy_log(0, "Failed to stat() (%s).\n", fn);
close(fd);
return -1;
}
if (st.st_size == 0) {
anthy_log(0, "Failed to mmap 0size file (%s).\n", fn);
close(fd);
return -1;
}
ptr = mmap (NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
if (ptr == MAP_FAILED) {
anthy_log(0, "Failed to mmap() (%s).\n", fn);
return -1;
}
fdic.ptr = ptr;
fdic.size = st.st_size;
return 0;
}
int
anthy_init_file_dic(void)
{
const char *fn;
fn = anthy_conf_get_str("DIC_FILE");
if (!fn) {
anthy_log(0, "dictionary is not specified.\n");
return -1;
}
/* 辞書をメモリ上にmapする */
if (anthy_mmap (fn) < 0) {
anthy_log(0, "failed to init file dic.\n");
return -1;
}
return 0;
}
void
anthy_quit_file_dic(void)
{
munmap (fdic.ptr, fdic.size);
}
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