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/*
 * XML Security Library (http://www.aleksey.com/xmlsec).
 *
 * Memory buffer.
 *
 * This is free software; see Copyright file in the source
 * distribution for preciese wording.
 *
 * Copyright (C) 2002-2016 Aleksey Sanin <aleksey@aleksey.com>. All Rights Reserved.
 */
#ifndef __XMLSEC_BUFFER_H__
#define __XMLSEC_BUFFER_H__

#include <libxml/tree.h>
#include <xmlsec/xmlsec.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

typedef struct _xmlSecBuffer                                    xmlSecBuffer,
                                                                *xmlSecBufferPtr;


/**
 * xmlSecAllocMode:
 * @xmlSecAllocModeExact:       the memory allocation mode that minimizes total
 *                              allocated memory size.
 * @xmlSecAllocModeDouble:      the memory allocation mode that tries to minimize
 *                              the number of malloc calls.
 *
 * The memory allocation mode (used by @xmlSecBuffer and @xmlSecList).
 */
typedef enum {
    xmlSecAllocModeExact = 0,
    xmlSecAllocModeDouble
} xmlSecAllocMode;

/*****************************************************************************
 *
 * xmlSecBuffer
 *
 ****************************************************************************/

/**
 * xmlSecBuffer:
 * @data: the pointer to buffer data.
 * @size: the current data size.
 * @maxSize: the max data size (allocated buffer size).
 * @allocMode: the buffer memory allocation mode.
 *
 * Binary data buffer.
 */
struct _xmlSecBuffer {
    xmlSecByte*         data;
    xmlSecSize          size;
    xmlSecSize          maxSize;
    xmlSecAllocMode     allocMode;
};

XMLSEC_EXPORT void              xmlSecBufferSetDefaultAllocMode (xmlSecAllocMode defAllocMode,
                                                                 xmlSecSize defInitialSize);

XMLSEC_EXPORT xmlSecBufferPtr   xmlSecBufferCreate              (xmlSecSize size);
XMLSEC_EXPORT void              xmlSecBufferDestroy             (xmlSecBufferPtr buf);
XMLSEC_EXPORT int               xmlSecBufferInitialize          (xmlSecBufferPtr buf,
                                                                 xmlSecSize size);
XMLSEC_EXPORT void              xmlSecBufferFinalize            (xmlSecBufferPtr buf);
XMLSEC_EXPORT xmlSecByte*       xmlSecBufferGetData             (xmlSecBufferPtr buf);
XMLSEC_EXPORT int               xmlSecBufferSetData             (xmlSecBufferPtr buf,
                                                                 const xmlSecByte* data,
                                                                 xmlSecSize size);
XMLSEC_EXPORT xmlSecSize        xmlSecBufferGetSize             (xmlSecBufferPtr buf);
XMLSEC_EXPORT int               xmlSecBufferSetSize             (xmlSecBufferPtr buf,
                                                                 xmlSecSize size);
XMLSEC_EXPORT xmlSecSize        xmlSecBufferGetMaxSize          (xmlSecBufferPtr buf);
XMLSEC_EXPORT int               xmlSecBufferSetMaxSize          (xmlSecBufferPtr buf,
                                                                 xmlSecSize size);
XMLSEC_EXPORT void              xmlSecBufferEmpty               (xmlSecBufferPtr buf);
XMLSEC_EXPORT int               xmlSecBufferAppend              (xmlSecBufferPtr buf,
                                                                 const xmlSecByte* data,
                                                                 xmlSecSize size);
XMLSEC_EXPORT int               xmlSecBufferPrepend             (xmlSecBufferPtr buf,
                                                                 const xmlSecByte* data,
                                                                 xmlSecSize size);
XMLSEC_EXPORT int               xmlSecBufferRemoveHead          (xmlSecBufferPtr buf,
                                                                 xmlSecSize size);
XMLSEC_EXPORT int               xmlSecBufferRemoveTail          (xmlSecBufferPtr buf,
                                                                 xmlSecSize size);

XMLSEC_EXPORT int               xmlSecBufferReadFile            (xmlSecBufferPtr buf,
                                                                 const char* filename);

XMLSEC_EXPORT int               xmlSecBufferBase64NodeContentRead(xmlSecBufferPtr buf,
                                                                 xmlNodePtr node);
XMLSEC_EXPORT int               xmlSecBufferBase64NodeContentWrite(xmlSecBufferPtr buf,
                                                                 xmlNodePtr node,
                                                                 int columns);

XMLSEC_EXPORT xmlOutputBufferPtr xmlSecBufferCreateOutputBuffer (xmlSecBufferPtr buf);


#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __XMLSEC_BUFFER_H__ */