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/*
* WinPR: Windows Portable Runtime
* Stream Utils
*
* Copyright 2011 Vic Lee
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <winpr/crt.h>
#include <winpr/stream.h>
BOOL Stream_EnsureCapacity(wStream* s, size_t size)
{
if (s->capacity < size)
{
size_t position;
size_t old_capacity;
size_t new_capacity;
BYTE* new_buf;
old_capacity = s->capacity;
new_capacity = old_capacity;
do
{
new_capacity *= 2;
}
while (new_capacity < size);
position = Stream_GetPosition(s);
if (!s->isOwner)
{
new_buf = (BYTE *)malloc(new_capacity);
CopyMemory(new_buf, s->buffer, s->capacity);
s->isOwner = TRUE;
}
else
{
new_buf = (BYTE*) realloc(s->buffer, new_capacity);
}
if (!new_buf)
return FALSE;
s->buffer = new_buf;
s->capacity = new_capacity;
s->length = new_capacity;
ZeroMemory(&s->buffer[old_capacity], s->capacity - old_capacity);
Stream_SetPosition(s, position);
}
return TRUE;
}
BOOL Stream_EnsureRemainingCapacity(wStream* s, size_t size)
{
if (Stream_GetPosition(s) + size > Stream_Capacity(s))
return Stream_EnsureCapacity(s, Stream_Capacity(s) + size);
return TRUE;
}
wStream* Stream_New(BYTE* buffer, size_t size)
{
wStream* s;
if (!buffer && !size)
return NULL;
s = malloc(sizeof(wStream));
if (!s)
return NULL;
if (buffer)
s->buffer = buffer;
else
s->buffer = (BYTE*) malloc(size);
if (!s->buffer)
{
free(s);
return NULL;
}
s->pointer = s->buffer;
s->capacity = size;
s->length = size;
s->pool = NULL;
s->count = 0;
s->isAllocatedStream = TRUE;
s->isOwner = TRUE;
return s;
}
void Stream_StaticInit(wStream *s, BYTE *buffer, size_t size)
{
assert(s);
assert(buffer);
s->buffer = s->pointer = buffer;
s->capacity = s->length = size;
s->pool = NULL;
s->count = 0;
s->isAllocatedStream = FALSE;
s->isOwner = FALSE;
}
void Stream_Free(wStream* s, BOOL bFreeBuffer)
{
if (s)
{
if (bFreeBuffer && s->isOwner)
free(s->buffer);
if (s->isAllocatedStream)
free(s);
}
}
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