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/*
* $Id: ml_bidi.c,v 1.22 2002/03/28 08:41:01 arakiken Exp $
*/
#include "ml_bidi.h"
#if 0
#define __DEBUG
#endif
#ifdef USE_FRIBIDI
#include <kiklib/kik_debug.h>
#include <kiklib/kik_mem.h> /* alloca/realloc/free */
#include <fribidi/fribidi.h>
/* --- global functions --- */
ml_bidi_state_t *
ml_bidi_new(void)
{
ml_bidi_state_t * state ;
if( ( state = malloc( sizeof( ml_bidi_state_t))) == NULL)
{
return NULL ;
}
state->visual_order = NULL ;
state->size = 0 ;
state->base_is_rtl = 0 ;
state->has_rtl = 0 ;
return state ;
}
int
ml_bidi_delete(
ml_bidi_state_t * state
)
{
free( state->visual_order) ;
free( state) ;
return 1 ;
}
int
ml_bidi_reset(
ml_bidi_state_t * state
)
{
state->size = 0 ;
return 1 ;
}
int
ml_bidi(
ml_bidi_state_t * state ,
ml_char_t * src ,
u_int size
)
{
FriBidiChar * fri_src ;
FriBidiCharType fri_type ;
FriBidiStrIndex * fri_order ;
u_char * bytes ;
int counter ;
if( size == 0)
{
state->size = 0 ;
state->base_is_rtl = 0 ;
return 1 ;
}
if( ( fri_src = alloca( sizeof( FriBidiChar) * size)) == NULL)
{
#ifdef DEBUG
kik_warn_printf( KIK_DEBUG_TAG " alloca() failed.\n") ;
#endif
return 0 ;
}
if( ( fri_order = alloca( sizeof( FriBidiStrIndex) * size)) == NULL)
{
#ifdef DEBUG
kik_warn_printf( KIK_DEBUG_TAG " alloca() failed.\n") ;
#endif
return 0 ;
}
state->has_rtl = 0 ;
for( counter = 0 ; counter < size ; counter ++)
{
bytes = ml_char_bytes( &src[counter]) ;
if( ml_char_cs( &src[counter]) == US_ASCII)
{
fri_src[counter] = bytes[0] ;
}
else if( ml_char_cs( &src[counter]) == ISO10646_UCS2_1)
{
fri_src[counter] = (bytes[0] << 8) + bytes[1] ;
}
else if( ml_char_cs( &src[counter]) == ISO10646_UCS4_1)
{
fri_src[counter] = (bytes[0] << 24) + (bytes[1] << 16) + (bytes[2] << 8) + bytes[3] ;
}
else
{
#ifdef __DEBUG
kik_debug_printf( KIK_DEBUG_TAG " %x is not ucs.\n" , ml_char_cs(&src[counter])) ;
#endif
/* white space */
fri_src[counter] = 0x20 ;
}
if( ! state->has_rtl && (fribidi_get_type( fri_src[counter]) & FRIBIDI_MASK_RTL))
{
state->has_rtl = 1 ;
}
}
#ifdef __DEBUG
kik_msg_printf( "utf8 text => \n") ;
for( counter = 0 ; counter < size ; counter ++)
{
kik_msg_printf( "%.4x " , fri_src[counter]) ;
}
kik_msg_printf( "\n") ;
#endif
fri_type = FRIBIDI_TYPE_ON ;
fribidi_log2vis( fri_src , size , &fri_type , NULL , fri_order , NULL , NULL) ;
if( state->size != size)
{
void * p ;
if( ( p = realloc( state->visual_order , sizeof( u_int16_t) * size)) == NULL)
{
#ifdef DEBUG
kik_warn_printf( KIK_DEBUG_TAG " realloc() failed.\n") ;
#endif
state->size = 0 ;
return 0 ;
}
state->visual_order = p ;
state->size = size ;
}
for( counter = 0 ; counter < size ; counter ++)
{
state->visual_order[counter] = fri_order[counter] ;
}
if( fri_type == FRIBIDI_TYPE_RTL)
{
state->base_is_rtl = 1 ;
}
else
{
state->base_is_rtl = 0 ;
}
#ifdef __DEBUG
kik_msg_printf( "visual order => ") ;
for( counter = 0 ; counter < size ; counter ++)
{
kik_msg_printf( "%.2d " , state->visual_order[counter]) ;
}
kik_msg_printf( "\n") ;
#endif
#ifdef DEBUG
for( counter = 0 ; counter < size ; counter ++)
{
if( state->visual_order[counter] >= size)
{
kik_warn_printf( KIK_DEBUG_TAG " visual order(%d) of %d is illegal.\n" ,
state->visual_order[counter] , counter) ;
kik_msg_printf( "returned order => ") ;
for( counter = 0 ; counter < size ; counter ++)
{
kik_msg_printf( "%d " , state->visual_order[counter]) ;
}
kik_msg_printf( "\n") ;
abort() ;
}
}
#endif
return 1 ;
}
#else
/* --- global functions --- */
ml_bidi_state_t *
ml_bidi_new(void)
{
return NULL ;
}
int
ml_bidi_delete(
ml_bidi_state_t * state
)
{
return 0 ;
}
int
ml_bidi_reset(
ml_bidi_state_t * state
)
{
return 0 ;
}
int
ml_bidi(
ml_bidi_state_t * state ,
ml_char_t * src ,
u_int size
)
{
return 0 ;
}
#endif
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