ftmemory.h
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上传日期:2020-08-09
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- /***************************************************************************/
- /* */
- /* ftmemory.h */
- /* */
- /* The FreeType memory management macros (specification). */
- /* */
- /* Copyright 1996-2001, 2002, 2004, 2005, 2006, 2007 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 __FTMEMORY_H__
- #define __FTMEMORY_H__
- #include <ft2build.h>
- #include FT_CONFIG_CONFIG_H
- #include FT_TYPES_H
- FT_BEGIN_HEADER
- /*************************************************************************/
- /* */
- /* <Macro> */
- /* FT_SET_ERROR */
- /* */
- /* <Description> */
- /* This macro is used to set an implicit `error' variable to a given */
- /* expression's value (usually a function call), and convert it to a */
- /* boolean which is set whenever the value is != 0. */
- /* */
- #undef FT_SET_ERROR
- #define FT_SET_ERROR( expression )
- ( ( error = (expression) ) != 0 )
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /**** ****/
- /**** ****/
- /**** M E M O R Y ****/
- /**** ****/
- /**** ****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*
- * C++ refuses to handle statements like p = (void*)anything; where `p'
- * is a typed pointer. Since we don't have a `typeof' operator in
- * standard C++, we have to use ugly casts.
- */
- #ifdef __cplusplus
- #define FT_ASSIGNP( p, val ) *((void**)&(p)) = (val)
- #else
- #define FT_ASSIGNP( p, val ) (p) = (val)
- #endif
- #ifdef FT_DEBUG_MEMORY
- FT_BASE( const char* ) _ft_debug_file;
- FT_BASE( long ) _ft_debug_lineno;
- #define FT_DEBUG_INNER( exp ) ( _ft_debug_file = __FILE__,
- _ft_debug_lineno = __LINE__,
- (exp) )
- #define FT_ASSIGNP_INNER( p, exp ) ( _ft_debug_file = __FILE__,
- _ft_debug_lineno = __LINE__,
- FT_ASSIGNP( p, exp ) )
- #else /* !FT_DEBUG_MEMORY */
- #define FT_DEBUG_INNER( exp ) (exp)
- #define FT_ASSIGNP_INNER( p, exp ) FT_ASSIGNP( p, exp )
- #endif /* !FT_DEBUG_MEMORY */
- /*
- * The allocation functions return a pointer, and the error code
- * is written to through the `p_error' parameter. See below for
- * for documentation.
- */
- FT_BASE( FT_Pointer )
- ft_mem_alloc( FT_Memory memory,
- FT_Long size,
- FT_Error *p_error );
- FT_BASE( FT_Pointer )
- ft_mem_qalloc( FT_Memory memory,
- FT_Long size,
- FT_Error *p_error );
- FT_BASE( FT_Pointer )
- ft_mem_realloc( FT_Memory memory,
- FT_Long item_size,
- FT_Long cur_count,
- FT_Long new_count,
- void* block,
- FT_Error *p_error );
- FT_BASE( FT_Pointer )
- ft_mem_qrealloc( FT_Memory memory,
- FT_Long item_size,
- FT_Long cur_count,
- FT_Long new_count,
- void* block,
- FT_Error *p_error );
- FT_BASE( void )
- ft_mem_free( FT_Memory memory,
- const void* P );
- #define FT_MEM_ALLOC( ptr, size )
- FT_ASSIGNP_INNER( ptr, ft_mem_alloc( memory, (size), &error ) )
- #define FT_MEM_FREE( ptr )
- FT_BEGIN_STMNT
- ft_mem_free( memory, (ptr) );
- (ptr) = NULL;
- FT_END_STMNT
- #define FT_MEM_NEW( ptr )
- FT_MEM_ALLOC( ptr, sizeof ( *(ptr) ) )
- #define FT_MEM_REALLOC( ptr, cursz, newsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, 1,
- (cursz), (newsz),
- (ptr), &error ) )
- #define FT_MEM_QALLOC( ptr, size )
- FT_ASSIGNP_INNER( ptr, ft_mem_qalloc( memory, (size), &error ) )
- #define FT_MEM_QNEW( ptr )
- FT_MEM_QALLOC( ptr, sizeof ( *(ptr) ) )
- #define FT_MEM_QREALLOC( ptr, cursz, newsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, 1,
- (cursz), (newsz),
- (ptr), &error ) )
- #define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ),
- (cursz), (newsz),
- (ptr), &error ) )
- #define FT_MEM_ALLOC_MULT( ptr, count, item_size )
- FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (item_size),
- 0, (count),
- NULL, &error ) )
- #define FT_MEM_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (itmsz),
- (oldcnt), (newcnt),
- (ptr), &error ) )
- #define FT_MEM_QALLOC_MULT( ptr, count, item_size )
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (item_size),
- 0, (count),
- NULL, &error ) )
- #define FT_MEM_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz)
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (itmsz),
- (oldcnt), (newcnt),
- (ptr), &error ) )
- #define FT_MEM_SET_ERROR( cond ) ( (cond), error != 0 )
- #define FT_MEM_SET( dest, byte, count ) ft_memset( dest, byte, count )
- #define FT_MEM_COPY( dest, source, count ) ft_memcpy( dest, source, count )
- #define FT_MEM_MOVE( dest, source, count ) ft_memmove( dest, source, count )
- #define FT_MEM_ZERO( dest, count ) FT_MEM_SET( dest, 0, count )
- #define FT_ZERO( p ) FT_MEM_ZERO( p, sizeof ( *(p) ) )
- #define FT_ARRAY_ZERO( dest, count )
- FT_MEM_ZERO( dest, (count) * sizeof ( *(dest) ) )
- #define FT_ARRAY_COPY( dest, source, count )
- FT_MEM_COPY( dest, source, (count) * sizeof ( *(dest) ) )
- #define FT_ARRAY_MOVE( dest, source, count )
- FT_MEM_MOVE( dest, source, (count) * sizeof ( *(dest) ) )
- /*
- * Return the maximum number of addressable elements in an array.
- * We limit ourselves to INT_MAX, rather than UINT_MAX, to avoid
- * any problems.
- */
- #define FT_ARRAY_MAX( ptr ) ( FT_INT_MAX / sizeof ( *(ptr) ) )
- #define FT_ARRAY_CHECK( ptr, count ) ( (count) <= FT_ARRAY_MAX( ptr ) )
- /*************************************************************************/
- /* */
- /* The following functions macros expect that their pointer argument is */
- /* _typed_ in order to automatically compute array element sizes. */
- /* */
- #define FT_MEM_NEW_ARRAY( ptr, count )
- FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ),
- 0, (count),
- NULL, &error ) )
- #define FT_MEM_RENEW_ARRAY( ptr, cursz, newsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ),
- (cursz), (newsz),
- (ptr), &error ) )
- #define FT_MEM_QNEW_ARRAY( ptr, count )
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ),
- 0, (count),
- NULL, &error ) )
- #define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz )
- FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ),
- (cursz), (newsz),
- (ptr), &error ) )
- #define FT_ALLOC( ptr, size )
- FT_MEM_SET_ERROR( FT_MEM_ALLOC( ptr, size ) )
- #define FT_REALLOC( ptr, cursz, newsz )
- FT_MEM_SET_ERROR( FT_MEM_REALLOC( ptr, cursz, newsz ) )
- #define FT_ALLOC_MULT( ptr, count, item_size )
- FT_MEM_SET_ERROR( FT_MEM_ALLOC_MULT( ptr, count, item_size ) )
- #define FT_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz )
- FT_MEM_SET_ERROR( FT_MEM_REALLOC_MULT( ptr, oldcnt,
- newcnt, itmsz ) )
- #define FT_QALLOC( ptr, size )
- FT_MEM_SET_ERROR( FT_MEM_QALLOC( ptr, size ) )
- #define FT_QREALLOC( ptr, cursz, newsz )
- FT_MEM_SET_ERROR( FT_MEM_QREALLOC( ptr, cursz, newsz ) )
- #define FT_QALLOC_MULT( ptr, count, item_size )
- FT_MEM_SET_ERROR( FT_MEM_QALLOC_MULT( ptr, count, item_size ) )
- #define FT_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz )
- FT_MEM_SET_ERROR( FT_MEM_QREALLOC_MULT( ptr, oldcnt,
- newcnt, itmsz ) )
- #define FT_FREE( ptr ) FT_MEM_FREE( ptr )
- #define FT_NEW( ptr ) FT_MEM_SET_ERROR( FT_MEM_NEW( ptr ) )
- #define FT_NEW_ARRAY( ptr, count )
- FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) )
- #define FT_RENEW_ARRAY( ptr, curcnt, newcnt )
- FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) )
- #define FT_QNEW( ptr )
- FT_MEM_SET_ERROR( FT_MEM_QNEW( ptr ) )
- #define FT_QNEW_ARRAY( ptr, count )
- FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) )
- #define FT_QRENEW_ARRAY( ptr, curcnt, newcnt )
- FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) )
- #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
- FT_BASE( FT_Error )
- FT_Alloc( FT_Memory memory,
- FT_Long size,
- void* *P );
- FT_BASE( FT_Error )
- FT_QAlloc( FT_Memory memory,
- FT_Long size,
- void* *p );
- FT_BASE( FT_Error )
- FT_Realloc( FT_Memory memory,
- FT_Long current,
- FT_Long size,
- void* *P );
- FT_BASE( FT_Error )
- FT_QRealloc( FT_Memory memory,
- FT_Long current,
- FT_Long size,
- void* *p );
- FT_BASE( void )
- FT_Free( FT_Memory memory,
- void* *P );
- #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
- FT_BASE( FT_Pointer )
- ft_mem_strdup( FT_Memory memory,
- const char* str,
- FT_Error *p_error );
- FT_BASE( FT_Pointer )
- ft_mem_dup( FT_Memory memory,
- const void* address,
- FT_ULong size,
- FT_Error *p_error );
- #define FT_MEM_STRDUP( dst, str )
- (dst) = ft_mem_strdup( memory, (const char*)(str), &error )
- #define FT_STRDUP( dst, str )
- FT_MEM_SET_ERROR( FT_MEM_STRDUP( dst, str ) )
- #define FT_MEM_DUP( dst, address, size )
- (dst) = ft_mem_dup( memory, (address), (FT_ULong)(size), &error )
- #define FT_DUP( dst, address, size )
- FT_MEM_SET_ERROR( FT_MEM_DUP( dst, address, size ) )
- /* Return >= 1 if a truncation occurs. */
- /* Return 0 if the source string fits the buffer. */
- /* This is *not* the same as strlcpy(). */
- FT_BASE( FT_Int )
- ft_mem_strcpyn( char* dst,
- const char* src,
- FT_ULong size );
- #define FT_STRCPYN( dst, src, size )
- ft_mem_strcpyn( (char*)dst, (const char*)(src), (FT_ULong)(size) )
- /* */
- FT_END_HEADER
- #endif /* __FTMEMORY_H__ */
- /* END */