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/**
* char.c
*
* Copyright (c) 1999, 2000, 2001
* Lu-chuan Kung and Kang-pen Chen.
* All rights reserved.
*
* Copyright (c) 2004, 2005, 2006, 2008
* libchewing Core Team. See ChangeLog for details.
*
* See the file "COPYING" for information on usage and redistribution
* of this file.
*/
/**
* @file char.c
* @brief word data file
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "global-private.h"
#include "chewing-definition.h"
#include "char-private.h"
#include "private.h"
#include "plat_mmap.h"
#ifdef USE_BINARY_DATA
static uint16* arrPhone = NULL;
static int *begin = NULL;
static int phone_num;
static plat_mmap char_begin_mmap;
static plat_mmap char_phone_mmap;
static void *dict = NULL;
static void *cur_pos = NULL;
static plat_mmap dict_mmap;
#else
static uint16 arrPhone[ PHONE_NUM + 1 ];
static int begin[ PHONE_NUM + 1 ];
static FILE *dictfile;
#endif
static int end_pos;
#if ! defined(USE_BINARY_DATA)
static char *fgettab( char *buf, int maxlen, FILE *fp )
{
int i;
for ( i = 0; i < maxlen; i++ ) {
buf[ i ] = (char) fgetc( fp );
if ( feof( fp ) )
break;
if ( buf[ i ] == '\t' )
break;
}
if ( feof( fp ) )
return 0;
buf[ i ] = '\0';
return buf;
}
#endif
static int CompUint16( const uint16 *pa, const uint16 *pb )
{
return ( (*pa) - (*pb) );
}
static void TerminateChar()
{
#ifdef USE_BINARY_DATA
plat_mmap_close( &char_begin_mmap );
plat_mmap_close( &char_phone_mmap );
plat_mmap_close( &dict_mmap );
#else
if ( dictfile )
fclose( dictfile );
#endif
}
int InitChar( const char *prefix )
{
char filename[ PATH_MAX ];
#ifdef USE_BINARY_DATA
long file_size;
size_t offset = 0;
size_t csize;
#else
FILE *indexfile;
int i;
#endif
sprintf( filename, "%s" PLAT_SEPARATOR "%s", prefix, CHAR_FILE );
#ifdef USE_BINARY_DATA
plat_mmap_set_invalid( &dict_mmap );
file_size = plat_mmap_create( &dict_mmap, filename, FLAG_ATTRIBUTE_READ );
assert( plat_mmap_is_valid( &dict_mmap ) );
if ( file_size < 0 )
return 0;
csize = file_size;
dict = (void *) plat_mmap_set_view( &dict_mmap, &offset, &csize );
assert( dict );
#else
dictfile = fopen( filename, "r" );
if ( ! dictfile )
return 0;
#endif
#ifdef USE_BINARY_DATA
sprintf( filename, "%s" PLAT_SEPARATOR "%s", prefix, CHAR_INDEX_BEGIN_FILE );
plat_mmap_set_invalid( &char_begin_mmap );
file_size = plat_mmap_create( &char_begin_mmap, filename, FLAG_ATTRIBUTE_READ );
assert( plat_mmap_is_valid( &char_begin_mmap ) );
if ( file_size < 0 )
return 0;
phone_num = file_size / sizeof(int);
csize = file_size;
begin = (int *) plat_mmap_set_view( &char_begin_mmap, &offset, &csize );
assert( begin );
if ( ! begin )
return 0;
sprintf( filename, "%s" PLAT_SEPARATOR "%s", prefix, CHAR_INDEX_PHONE_FILE );
plat_mmap_set_invalid( &char_phone_mmap );
file_size = plat_mmap_create( &char_phone_mmap, filename, FLAG_ATTRIBUTE_READ );
assert( plat_mmap_is_valid( &char_phone_mmap ) );
if ( file_size < 0 )
return 0;
assert( phone_num == file_size / sizeof(uint16) );
offset = 0;
csize = file_size;
arrPhone = (uint16 *) plat_mmap_set_view( &char_phone_mmap, &offset, &csize );
assert( arrPhone );
if ( ! arrPhone )
return 0;
#else
sprintf( filename, "%s" PLAT_SEPARATOR "%s", prefix, CHAR_INDEX_FILE );
indexfile = fopen( filename, "r" );
if ( ! dictfile || ! indexfile )
return 0;
for ( i = 0; i <= PHONE_NUM; i++ )
fscanf( indexfile, "%hu %d", &arrPhone[ i ], &begin[ i ] );
fclose( indexfile );
#endif
addTerminateService( TerminateChar );
return 1;
}
static void Str2Word( Word *wrd_ptr )
{
#ifndef USE_BINARY_DATA
char buf[ 1000 ];
uint16 sh;
fgettab( buf, 1000, dictfile );
/* only read 6 bytes to wrd_ptr->word avoid buffer overflow */
sscanf( buf, "%hu %6[^ ]", &sh, wrd_ptr->word );
assert( wrd_ptr->word != '\0' );
#else
unsigned char size;
size = *(unsigned char *) cur_pos;
cur_pos = (unsigned char*)cur_pos + sizeof(unsigned char);
memcpy( wrd_ptr->word, cur_pos, size );
cur_pos = (unsigned char*)cur_pos + size;
wrd_ptr->word[ size ] = '\0';
#endif
}
int GetCharFirst( Word *wrd_ptr, uint16 phoneid )
{
uint16 *pinx;
pinx = (uint16 *) bsearch(
#ifdef USE_BINARY_DATA
&phoneid, arrPhone, phone_num,
#else
&phoneid, arrPhone, PHONE_NUM,
#endif
sizeof( uint16 ), (CompFuncType) CompUint16 );
if ( ! pinx )
return 0;
#ifndef USE_BINARY_DATA
fseek( dictfile, begin[ pinx - arrPhone ], SEEK_SET );
#else
cur_pos = (unsigned char*)dict + begin[ pinx - arrPhone ];
#endif
end_pos = begin[ pinx - arrPhone + 1 ];
Str2Word( wrd_ptr );
return 1;
}
int GetCharNext( Word *wrd_ptr )
{
#ifndef USE_BINARY_DATA
if ( ftell( dictfile ) >= end_pos )
return 0;
#else
if ( (unsigned char*)cur_pos >= (unsigned char*)dict + end_pos )
return 0;
#endif
Str2Word( wrd_ptr );
return 1;
}
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