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/*
* "streamable kanji code filter and converter"
* Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
*
* LICENSE NOTICES
*
* This file is part of "streamable kanji code filter and converter",
* which is distributed under the terms of GNU Lesser General Public
* License (version 2) as published by the Free Software Foundation.
*
* This software 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with "streamable kanji code filter and converter";
* if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* The author of this file:
*
*/
/*
* The source code included in this files was separated from mbfilter.c
* by Moriyoshi Koizumi <moriyoshi@php.net> on 20 Dec 2002. The file
* mbfilter.c is included in this package .
*
*/
#include <stddef.h>
#include <string.h>
#include "zend.h"
#include "mbfl_memory_device.h"
/*
* memory device output functions
*/
void mbfl_memory_device_init(mbfl_memory_device *device, size_t initsz, size_t allocsz)
{
device->buffer = (initsz > 0) ? emalloc(initsz) : NULL;
device->length = initsz;
device->pos = 0;
device->allocsz = MAX(allocsz, MBFL_MEMORY_DEVICE_ALLOC_SIZE);
}
void mbfl_memory_device_realloc(mbfl_memory_device *device, size_t initsz, size_t allocsz)
{
if (initsz > device->length) {
device->buffer = erealloc(device->buffer, initsz);
device->length = initsz;
}
device->allocsz = MAX(allocsz, MBFL_MEMORY_DEVICE_ALLOC_SIZE);
}
void mbfl_memory_device_clear(mbfl_memory_device *device)
{
if (device->buffer) {
efree(device->buffer);
}
device->buffer = NULL;
device->length = device->pos = 0;
}
void mbfl_memory_device_reset(mbfl_memory_device *device)
{
device->pos = 0;
}
void mbfl_memory_device_unput(mbfl_memory_device *device)
{
if (device->pos > 0) {
device->pos--;
}
}
mbfl_string* mbfl_memory_device_result(mbfl_memory_device *device, mbfl_string *result)
{
result->len = device->pos;
mbfl_memory_device_output('\0', device);
result->val = device->buffer;
device->buffer = NULL;
device->length = device->pos = 0;
return result;
}
int mbfl_memory_device_output(int c, void *data)
{
mbfl_memory_device *device = (mbfl_memory_device *)data;
if (device->pos >= device->length) {
/* reallocate buffer */
if (device->length > SIZE_MAX - device->allocsz) {
/* overflow */
return -1;
}
size_t newlen = device->length + device->allocsz;
device->buffer = erealloc(device->buffer, newlen);
device->length = newlen;
}
device->buffer[device->pos++] = (unsigned char)c;
return c;
}
int mbfl_memory_device_strcat(mbfl_memory_device *device, const char *psrc)
{
return mbfl_memory_device_strncat(device, psrc, strlen(psrc));
}
int mbfl_memory_device_strncat(mbfl_memory_device *device, const char *psrc, size_t len)
{
if (len > device->length - device->pos) {
/* reallocate buffer */
if (len > SIZE_MAX - MBFL_MEMORY_DEVICE_ALLOC_SIZE
|| device->length > SIZE_MAX - (len + MBFL_MEMORY_DEVICE_ALLOC_SIZE)) {
/* overflow */
return -1;
}
size_t newlen = device->length + len + MBFL_MEMORY_DEVICE_ALLOC_SIZE;
device->buffer = erealloc(device->buffer, newlen);
device->length = newlen;
}
unsigned char *w = &device->buffer[device->pos];
memcpy(w, psrc, len);
device->pos += len;
return 0;
}
int mbfl_memory_device_devcat(mbfl_memory_device *dest, mbfl_memory_device *src)
{
return mbfl_memory_device_strncat(dest, (const char*)src->buffer, src->pos);
}
void mbfl_wchar_device_init(mbfl_wchar_device *device)
{
device->buffer = NULL;
device->length = 0;
device->pos = 0;
device->allocsz = MBFL_MEMORY_DEVICE_ALLOC_SIZE;
}
void mbfl_wchar_device_clear(mbfl_wchar_device *device)
{
if (device->buffer) {
efree(device->buffer);
}
device->buffer = NULL;
device->length = device->pos = 0;
}
int mbfl_wchar_device_output(int c, void *data)
{
mbfl_wchar_device *device = (mbfl_wchar_device *)data;
if (device->pos >= device->length) {
/* reallocate buffer */
size_t newlen;
if (device->length > SIZE_MAX - device->allocsz) {
/* overflow */
return -1;
}
newlen = device->length + device->allocsz;
if (newlen > SIZE_MAX / sizeof(int)) {
/* overflow */
return -1;
}
device->buffer = erealloc(device->buffer, newlen * sizeof(int));
device->length = newlen;
}
device->buffer[device->pos++] = c;
return c;
}
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