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/**
* @file
*
* @ingroup DOSFS
*
* @brief Default Converter
*/
/*
* Copyright (c) 2013 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <assert.h>
#include <rtems/endian.h>
#include <rtems/dosfs.h>
#include "fat.h"
#include "msdos.h"
static int msdos_default_utf8_to_codepage(
rtems_dosfs_convert_control *super,
const uint8_t *src,
const size_t src_size,
char *dst,
size_t *dst_size
)
{
int eno = 0;
size_t bytes_to_copy = MIN( src_size, *dst_size );
(void) super;
*dst_size = bytes_to_copy;
memcpy( dst, src, bytes_to_copy );
return eno;
}
static int msdos_default_codepage_to_utf8(
rtems_dosfs_convert_control *super,
const char *src,
const size_t src_size,
uint8_t *dst,
size_t *dst_size
)
{
int eno = 0;
size_t bytes_to_copy = MIN( src_size, *dst_size );
(void) super;
*dst_size = bytes_to_copy;
memcpy( dst, src, bytes_to_copy );
return eno;
}
static int msdos_default_utf8_to_utf16(
rtems_dosfs_convert_control *super,
const uint8_t *src,
const size_t src_size,
uint16_t *dst,
size_t *dst_size
)
{
int eno = 0;
size_t bytes_to_copy = MIN( src_size, *dst_size / 2);
size_t i;
(void) super;
*dst_size = 2 * bytes_to_copy;
for ( i = 0; eno == 0 && i < bytes_to_copy; ++i ) {
uint16_t utf16_native = src[i];
if ( utf16_native <= 127 ) {
dst[i] = CT_LE_W( utf16_native );
} else {
eno = EINVAL;
}
}
return eno;
}
static int msdos_default_utf16_to_utf8(
rtems_dosfs_convert_control *super,
const uint16_t *src,
const size_t src_size,
uint8_t *dst,
size_t *dst_size
)
{
int eno = 0;
size_t bytes_to_copy = MIN( src_size / 2, *dst_size );
size_t i;
(void) super;
*dst_size = bytes_to_copy;
for ( i = 0; eno == 0 && i < bytes_to_copy; ++i ) {
uint16_t utf16_le = src[i];
uint16_t utf16_native = CF_LE_W( utf16_le );
if ( utf16_native <= 127 ) {
dst[i] = (uint8_t) utf16_native;
} else {
eno = EINVAL;
}
}
return eno;
}
static int msdos_default_normalize_and_fold(
rtems_dosfs_convert_control *super,
const uint8_t *src,
const size_t src_size,
uint8_t *dst,
size_t *dst_size
)
{
int eno = 0;
size_t bytes_to_copy = MIN( src_size, *dst_size );
size_t i;
(void) super;
*dst_size = bytes_to_copy;
for ( i = 0; i < bytes_to_copy; ++i ) {
dst[i] = tolower( src[i] );
}
return eno;
}
static void msdos_default_destroy(
rtems_dosfs_convert_control *super
)
{
free( super );
}
static const rtems_dosfs_convert_handler msdos_default_convert_handler = {
.utf8_to_codepage = msdos_default_utf8_to_codepage,
.codepage_to_utf8 = msdos_default_codepage_to_utf8,
.utf8_to_utf16 = msdos_default_utf8_to_utf16,
.utf16_to_utf8 = msdos_default_utf16_to_utf8,
.utf8_normalize_and_fold = msdos_default_normalize_and_fold,
.destroy = msdos_default_destroy
};
typedef struct {
rtems_dosfs_convert_control super;
uint8_t buffer[MSDOS_NAME_MAX_LFN_BYTES];
} msdos_default_convert_control;
rtems_dosfs_convert_control *rtems_dosfs_create_default_converter(void)
{
msdos_default_convert_control *self = malloc( sizeof( *self ) );
if ( self != NULL ) {
rtems_dosfs_convert_control *super = &self->super;
super->handler = &msdos_default_convert_handler;
super->buffer.data = &self->buffer;
super->buffer.size = sizeof( self->buffer );
}
return &self->super;
}
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