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/*
* Data serializer (with byte-order consideration).
*
* Copyright (c) 2005 Nyaochi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA, or visit
* http://www.gnu.org/copyleft/gpl.html .
*
*/
/* $Id: serialize.c,v 1.8 2005/06/04 00:13:05 nyaochi Exp $ */
/*
* This module reads/writes machine-dependent values from/to:
* - 16 bits unsigned integer (little endian)
* - 32 bits unsigned integer (little endian)
* - UCS-2 string (little endian)
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif/*HAVE_CONFIG_H*/
#include <os.h>
#include <stdio.h>
#include <stdlib.h>
#include <ucs2char.h>
#include "bufferedfile.h"
#include "serialize.h"
int serialize_uint16(struct bfile *bfp, uint16_t* val, int is_storing)
{
int ret;
uint8_t v[2];
if (is_storing) {
v[0] = (uint8_t)(*val & 0xFF);
v[1] = (uint8_t)(*val >> 8);
ret = (bf_write(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
} else {
ret = (bf_read(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
*val = (uint16_t)v[1] << 8 | (uint16_t)v[0];
}
return ret;
}
int serialize_uint32(struct bfile *bfp, uint32_t* val, int is_storing)
{
int ret;
uint8_t v[4];
if (is_storing) {
v[0] = (uint8_t)(*val & 0xFF);
v[1] = (uint8_t)(*val >> 8);
v[2] = (uint8_t)(*val >> 16);
v[3] = (uint8_t)(*val >> 24);
ret = (bf_write(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
} else {
ret = (bf_read(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
*val = (uint32_t)v[3] << 24 | (uint32_t)v[2] << 16 | (uint32_t)v[1] << 8 | (uint32_t)v[0];
}
return ret;
}
int serialize_ucs2le_char(struct bfile *bfp, ucs2_char_t* val, int is_storing)
{
int ret;
uint8_t v[2];
if (is_storing) {
v[0] = (uint8_t)(*val & 0xFF);
v[1] = (uint8_t)(*val >> 8);
ret = (bf_write(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
} else {
ret = (bf_read(bfp, v, sizeof(v)) == sizeof(v) ? 0 : 1);
*val = (ucs2_char_t)v[1] << 8 | (ucs2_char_t)v[0];
}
return ret;
}
static int write_ucs2le_null(struct bfile *bfp)
{
ucs2_char_t null = 0;
return serialize_ucs2le_char(bfp, &null, 1);
}
int serialize_ucs2le(struct bfile *bfp, ucs2_char_t** val, int is_storing)
{
int ret = 0;
if (is_storing) {
if (*val) {
const ucs2_char_t* str = *val;
size_t i;
for (i = 0;i < ucs2len(*val)+1;i++) {
ret |= serialize_ucs2le_char(bfp, (ucs2_char_t*)&str[i], is_storing);
}
return ret;
} else {
return write_ucs2le_null(bfp);
}
} else {
size_t length = 0;
ucs2_char_t c;
*val = 0;
for (;;) {
if (serialize_ucs2le_char(bfp, &c, is_storing) != 0) {
return 1; /* Read error or file terminates without null character. */
}
*val = ucs2realloc(*val, sizeof(ucs2_char_t) * (length+1));
if (!*val) {
return 1; /* Out of memory. */
}
(*val)[length++] = c;
if (!c) {
return 0; /* Exit with success. */
}
}
}
}
int serialize_ucs2le_fixed(struct bfile *bfp, ucs2_char_t* val, size_t length, int is_storing)
{
size_t i;
int ret = 0;
for (i = 0;i < length;i++) {
ret |= serialize_ucs2le_char(bfp, &val[i], is_storing);
}
return ret;
}
int serialize_ucs2le_limited(struct bfile *bfp, ucs2_char_t** val, size_t length, int is_storing)
{
if (is_storing) {
if (!*val) {
return write_ucs2le_null(bfp);
} else if (ucs2len(*val) < length) {
return serialize_ucs2le_fixed(bfp, *val, ucs2len(*val)+1, is_storing);
} else {
ucs2_char_t null = 0;
int ret = serialize_ucs2le_fixed(bfp, *val, length-1, is_storing);
ret |= write_ucs2le_null(bfp);
return ret;
}
} else {
*val = ucs2malloc(sizeof(ucs2_char_t) * length);
if (*val) {
return serialize_ucs2le_fixed(bfp, *val, length, is_storing);
} else {
return 1;
}
}
}
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