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