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/*
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* Copyright (c) 1999 - 2001 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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/*****************************************************************
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** File name: NW_Buffer.c
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** Part of: Buffer
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** Version: 3/16/99 Initial version
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** Description: Provides the interface to a managerd buffer of bytes.
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** The buffer contains an allocated size and an in use
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** size (length) and also a pointer to a data array.
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******************************************************************/
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/*
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**-------------------------------------------------------------------------
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** Include Files
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**-------------------------------------------------------------------------
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*/
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#include "nwx_buffer.h"
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#include "nwx_mem.h"
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#include "nwx_assert.h"
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#include "nw_string_utils.h"
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/*
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**-------------------------------------------------------------------------
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** Constants
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** Internal Types
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** Macros
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** Internal Prototypes
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** File Scoped Static Variables
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** Global Variable Definitions
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**-------------------------------------------------------------------------
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*/
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/*
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**-------------------------------------------------------------------------
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** Internal Functions
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**-------------------------------------------------------------------------
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*/
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static NW_Status_t Resize_Data(NW_Buffer_t *buffer, const NW_Uint32 len)
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{
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void *temp;
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if (buffer->allocatedLength < len) {
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temp = NW_Mem_Malloc(len);
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if (temp == NULL)
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return NW_STAT_OUT_OF_MEMORY;
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NW_Mem_Free(buffer->data);
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buffer->length = 0;
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buffer->allocatedLength = len;
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buffer->data = temp;
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}
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return NW_STAT_SUCCESS;
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}
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/*
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**-------------------------------------------------------------------------
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** External Public (Exported) Functions
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**-------------------------------------------------------------------------
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*/
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/*****************************************************************
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** Name: NW_Buffer_New
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** Description: creates a new buffer
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** Parameters: size - size to allocate
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** Return Value: pointer to the new buffer
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******************************************************************/
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NW_Buffer_t *NW_Buffer_New(const NW_Uint32 size)
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{
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NW_Buffer_t *buffer;
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buffer = NW_Mem_Malloc(sizeof(NW_Buffer_t));
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if (buffer != NULL) {
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buffer->length = 0;
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buffer->allocatedLength = size;
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buffer->data = NULL;
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if (size > 0) {
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buffer->data = NW_Mem_Malloc(size);
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if (buffer->data == NULL) {
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NW_Mem_Free(buffer);
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return NULL;
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}
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}
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}
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return buffer;
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}
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/*****************************************************************
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** Name: NW_Buffer_Free
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** Description: frees the space allocated for a buffer
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** Parameters: *buffer - the buffer to free
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** Return Value: void
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******************************************************************/
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EXPORT_C void NW_Buffer_Free(NW_Buffer_t *buffer)
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{
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if (buffer != NULL) {
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if (buffer->data != NULL) {
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NW_Mem_Free(buffer->data);
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buffer->data = NULL;
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}
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NW_Mem_Free(buffer);
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}
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return;
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}
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/*****************************************************************
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** Name: NW_Buffer_FreeNotData
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** Description: free the space allocated for a buffer.
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** Parameters: *buffer - the buffer to free
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** Return Value: void
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** Notes: This does not free the data
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******************************************************************/
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EXPORT_C void NW_Buffer_FreeNotData(NW_Buffer_t *buffer)
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{
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if (buffer != NULL) {
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buffer->data = NULL;
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NW_Mem_Free(buffer);
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}
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return;
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}
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/*****************************************************************
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** Name: NW_Buffer_CopyStr
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** Description: Copy NULL terminated string into buffer and adjust
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** length. If necessary, reallocate space.
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** Parameters: *buffer - the buffer to copy to
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** *str - the string to copy from
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** Return Value: NW_STAT_SUCCESS if succeeds, else NW_STAT_OUT_OF_MEMORY
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******************************************************************/
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NW_Status_t NW_Buffer_CopyStr(NW_Buffer_t *buffer, const NW_Ucs2 *str)
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{
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NW_Uint16 len;
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NW_ASSERT(buffer != NULL);
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NW_ASSERT(str != NULL);
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len = (NW_Uint16)NW_Str_Strsize(str);
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if (Resize_Data(buffer, len) == NW_STAT_OUT_OF_MEMORY)
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return NW_STAT_OUT_OF_MEMORY;
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NW_Mem_memcpy(buffer->data, str, len);
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buffer->length = len;
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return NW_STAT_SUCCESS;
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}
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/*****************************************************************
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** Name: NW_Buffer_CopyBuffers
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** Description: Copy NW_Buffer into buffer (NW_Buffer)
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** and adjust length. If necessary, reallocate space.
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** Parameters: *to - the buffer to copy to
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** *from - the buffer to copy from
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** Return Value: NW_STAT_SUCCESS if succeeds, else NW_STAT_OUT_OF_MEMORY
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******************************************************************/
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NW_Status_t NW_Buffer_CopyBuffers(NW_Buffer_t *to, const NW_Buffer_t *from)
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{
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NW_ASSERT(to != NULL);
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NW_ASSERT(from != NULL);
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if (Resize_Data(to, from->length) == NW_STAT_OUT_OF_MEMORY)
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return NW_STAT_OUT_OF_MEMORY;
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NW_Mem_memcpy(to->data, from->data, from->length);
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to->length = from->length;
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return NW_STAT_SUCCESS;
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}
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/*****************************************************************
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** Name: NW_Buffer_SetData
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** Description: Set NULL terminated ascii string into buffer and
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** adjust length.
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** Parameters: *buffer - the buffer to copy to
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** *str - the string to set into buffer
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** Return Value: void
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******************************************************************/
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void NW_Buffer_SetData(NW_Buffer_t *buffer, char *str)
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{
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NW_Uint32 len;
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NW_ASSERT(buffer != NULL);
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NW_ASSERT(str != NULL);
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if(buffer->data != NULL) {
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NW_Mem_Free(buffer->data);
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}
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len = (NW_Asc_strlen(str) + 1) * sizeof(char);
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buffer->length = len;
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buffer->allocatedLength = len;
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buffer->data = (NW_Byte *)str;
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return;
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}
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