[SOLVED] CS代考计算机代写 /***************************************************************************/

/***************************************************************************/
/* */
/*ftsystem.h */
/* */
/*FreeType low-level system interface definition (specification).*/
/* */
/*Copyright 1996-2015 by */
/*David Turner, Robert Wilhelm, and Werner Lemberg.*/
/* */
/*This file is part of the FreeType project, and may only be used, */
/*modified, and distributed under the terms of the FreeType project*/
/*license, LICENSE.TXT.By continuing to use, modify, or distribute */
/*this file you indicate that you have read the license and*/
/*understand and accept it fully.*/
/* */
/***************************************************************************/

#ifndef __FTSYSTEM_H__
#define __FTSYSTEM_H__

#include

FT_BEGIN_HEADER

/*************************************************************************/
/* */
/*

*/
/* system_interface*/
/* */
/*

/*************************************************************************/
/* */
/*M E M O R Y M A N A G E M E N T*/
/* */
/*************************************************************************/

/*************************************************************************
*
* @type:
* FT_Memory
*
* @description:
* A handle to a given memory manager object, defined with an
* @FT_MemoryRec structure.
*
*/
typedef struct FT_MemoryRec_*FT_Memory;

/*************************************************************************
*
* @functype:
* FT_Alloc_Func
*
* @description:
* A function used to allocate `size’ bytes from `memory’.
*
* @input:
* memory ::
* A handle to the source memory manager.
*
* size ::
* The size in bytes to allocate.
*
* @return:
* Address of new memory block.0~in case of failure.
*
*/
typedef void*
(*FT_Alloc_Func)( FT_Memorymemory,
long size );

/*************************************************************************
*
* @functype:
* FT_Free_Func
*
* @description:
* A function used to release a given block of memory.
*
* @input:
* memory ::
* A handle to the source memory manager.
*
* block ::
* The address of the target memory block.
*
*/
typedef void
(*FT_Free_Func)( FT_Memorymemory,
void*block );

/*************************************************************************
*
* @functype:
* FT_Realloc_Func
*
* @description:
* A function used to re-allocate a given block of memory.
*
* @input:
* memory ::
* A handle to the source memory manager.
*
* cur_size ::
* The block’s current size in bytes.
*
* new_size ::
* The block’s requested new size.
*
* block ::
* The block’s current address.
*
* @return:
* New block address.0~in case of memory shortage.
*
* @note:
* In case of error, the old block must still be available.
*
*/
typedef void*
(*FT_Realloc_Func)( FT_Memorymemory,
long cur_size,
long new_size,
void*block );

/*************************************************************************
*
* @struct:
* FT_MemoryRec
*
* @description:
* A structure used to describe a given memory manager to FreeType~2.
*
* @fields:
* user ::
* A generic typeless pointer for user data.
*
* alloc ::
* A pointer type to an allocation function.
*
* free ::
* A pointer type to an memory freeing function.
*
* realloc ::
* A pointer type to a reallocation function.
*
*/
structFT_MemoryRec_
{
void*user;
FT_Alloc_Funcalloc;
FT_Free_Func free;
FT_Realloc_Funcrealloc;
};

/*************************************************************************/
/* */
/* I / O M A N A G E M E N T */
/* */
/*************************************************************************/

/*************************************************************************
*
* @type:
* FT_Stream
*
* @description:
* A handle to an input stream.
*
* @also:
* See @FT_StreamRec for the publicly accessible fields of a given
* stream object.
*
*/
typedef struct FT_StreamRec_*FT_Stream;

/*************************************************************************
*
* @struct:
* FT_StreamDesc
*
* @description:
* A union type used to store either a long or a pointer.This is used
* to store a file descriptor or a `FILE*’ in an input stream.
*
*/
typedef unionFT_StreamDesc_
{
long value;
void*pointer;

} FT_StreamDesc;

/*************************************************************************
*
* @functype:
* FT_Stream_IoFunc
*
* @description:
* A function used to seek and read data from a given input stream.
*
* @input:
* stream ::
* A handle to the source stream.
*
* offset ::
* The offset of read in stream (always from start).
*
* buffer ::
* The address of the read buffer.
*
* count ::
* The number of bytes to read from the stream.
*
* @return:
* The number of bytes effectively read by the stream.
*
* @note:
* This function might be called to perform a seek or skip operation
* with a `count’ of~0.A non-zero return value then indicates an
* error.
*
*/
typedef unsigned long
(*FT_Stream_IoFunc)( FT_Stream stream,
unsigned long offset,
unsigned char*buffer,
unsigned long count );

/*************************************************************************
*
* @functype:
* FT_Stream_CloseFunc
*
* @description:
* A function used to close a given input stream.
*
* @input:
*stream ::
* A handle to the target stream.
*
*/
typedef void
(*FT_Stream_CloseFunc)( FT_Streamstream );

/*************************************************************************
*
* @struct:
* FT_StreamRec
*
* @description:
* A structure used to describe an input stream.
*
* @input:
* base ::
* For memory-based streams, this is the address of the first stream
* byte in memory.This field should always be set to NULL for
* disk-based streams.
*
* size ::
* The stream size in bytes.
*
* In case of compressed streams where the size is unknown before
* actually doing the decompression, the value is set to 0x7FFFFFFF.
* (Note that this size value can occur for normal streams also; it is
* thus just a hint.)
*
* pos ::
* The current position within the stream.
*
* descriptor ::
* This field is a union that can hold an integer or a pointer.It is
* used by stream implementations to store file descriptors or `FILE*’
* pointers.
*
* pathname ::
* This field is completely ignored by FreeType.However, it is often
* useful during debugging to use it to store the stream’s filename
* (where available).
*
* read ::
* The stream’s input function.
*
* close ::
* The stream’s close function.
*
* memory ::
* The memory manager to use to preload frames.This is set
* internally by FreeType and shouldn’t be touched by stream
* implementations.
*
* cursor ::
* This field is set and used internally by FreeType when parsing
* frames.
*
* limit ::
* This field is set and used internally by FreeType when parsing
* frames.
*
*/
typedef structFT_StreamRec_
{
unsigned char* base;
unsigned longsize;
unsigned longpos;

FT_StreamDescdescriptor;
FT_StreamDescpathname;
FT_Stream_IoFunc read;
FT_Stream_CloseFuncclose;

FT_Memorymemory;
unsigned char* cursor;
unsigned char* limit;

} FT_StreamRec;

/* */

FT_END_HEADER

#endif /* __FTSYSTEM_H__ */

/* END */