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/***************************************************************************/ |
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/* */ |
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/* ftmemory.h */ |
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/* */ |
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/* The FreeType memory management macros (specification). */ |
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/* */ |
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/* Copyright 1996-2001, 2002, 2004, 2005, 2006, 2007, 2010 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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#ifndef __FTMEMORY_H__ |
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#define __FTMEMORY_H__ |
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#include |
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#include FT_CONFIG_CONFIG_H |
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#include FT_TYPES_H |
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FT_BEGIN_HEADER |
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/*************************************************************************/ |
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/* */ |
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/* */ |
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/* FT_SET_ERROR */ |
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/* */ |
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/* */ |
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/* This macro is used to set an implicit `error' variable to a given */ |
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/* expression's value (usually a function call), and convert it to a */ |
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/* boolean which is set whenever the value is != 0. */ |
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/* */ |
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#undef FT_SET_ERROR |
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#define FT_SET_ERROR( expression ) \ |
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( ( error = (expression) ) != 0 ) |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/**** ****/ |
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/**** ****/ |
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/**** M E M O R Y ****/ |
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/**** ****/ |
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/**** ****/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/* |
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* C++ refuses to handle statements like p = (void*)anything, with `p' a |
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* typed pointer. Since we don't have a `typeof' operator in standard |
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* C++, we have to use a template to emulate it. |
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*/ |
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#ifdef __cplusplus |
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extern "C++" |
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template inline T* |
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cplusplus_typeof( T*, |
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void *v ) |
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{ |
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return static_cast ( v ); |
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} |
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#define FT_ASSIGNP( p, val ) (p) = cplusplus_typeof( (p), (val) ) |
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#else |
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#define FT_ASSIGNP( p, val ) (p) = (val) |
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#endif |
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#ifdef FT_DEBUG_MEMORY |
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FT_BASE( const char* ) _ft_debug_file; |
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FT_BASE( long ) _ft_debug_lineno; |
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#define FT_DEBUG_INNER( exp ) ( _ft_debug_file = __FILE__, \ |
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_ft_debug_lineno = __LINE__, \ |
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(exp) ) |
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#define FT_ASSIGNP_INNER( p, exp ) ( _ft_debug_file = __FILE__, \ |
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_ft_debug_lineno = __LINE__, \ |
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FT_ASSIGNP( p, exp ) ) |
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#else /* !FT_DEBUG_MEMORY */ |
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#define FT_DEBUG_INNER( exp ) (exp) |
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#define FT_ASSIGNP_INNER( p, exp ) FT_ASSIGNP( p, exp ) |
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#endif /* !FT_DEBUG_MEMORY */ |
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/* |
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* The allocation functions return a pointer, and the error code |
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* is written to through the `p_error' parameter. See below for |
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* for documentation. |
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*/ |
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FT_BASE( FT_Pointer ) |
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ft_mem_alloc( FT_Memory memory, |
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FT_Long size, |
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FT_Error *p_error ); |
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FT_BASE( FT_Pointer ) |
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ft_mem_qalloc( FT_Memory memory, |
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FT_Long size, |
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FT_Error *p_error ); |
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FT_BASE( FT_Pointer ) |
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ft_mem_realloc( FT_Memory memory, |
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FT_Long item_size, |
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FT_Long cur_count, |
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FT_Long new_count, |
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void* block, |
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FT_Error *p_error ); |
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FT_BASE( FT_Pointer ) |
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ft_mem_qrealloc( FT_Memory memory, |
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FT_Long item_size, |
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FT_Long cur_count, |
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FT_Long new_count, |
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void* block, |
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FT_Error *p_error ); |
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FT_BASE( void ) |
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ft_mem_free( FT_Memory memory, |
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const void* P ); |
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#define FT_MEM_ALLOC( ptr, size ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_alloc( memory, (size), &error ) ) |
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#define FT_MEM_FREE( ptr ) \ |
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FT_BEGIN_STMNT \ |
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ft_mem_free( memory, (ptr) ); \ |
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(ptr) = NULL; \ |
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FT_END_STMNT |
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#define FT_MEM_NEW( ptr ) \ |
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FT_MEM_ALLOC( ptr, sizeof ( *(ptr) ) ) |
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#define FT_MEM_REALLOC( ptr, cursz, newsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, 1, \ |
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(cursz), (newsz), \ |
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(ptr), &error ) ) |
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#define FT_MEM_QALLOC( ptr, size ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qalloc( memory, (size), &error ) ) |
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#define FT_MEM_QNEW( ptr ) \ |
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FT_MEM_QALLOC( ptr, sizeof ( *(ptr) ) ) |
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#define FT_MEM_QREALLOC( ptr, cursz, newsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, 1, \ |
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(cursz), (newsz), \ |
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(ptr), &error ) ) |
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#define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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(cursz), (newsz), \ |
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(ptr), &error ) ) |
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#define FT_MEM_ALLOC_MULT( ptr, count, item_size ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (item_size), \ |
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0, (count), \ |
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NULL, &error ) ) |
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#define FT_MEM_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (itmsz), \ |
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(oldcnt), (newcnt), \ |
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(ptr), &error ) ) |
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#define FT_MEM_QALLOC_MULT( ptr, count, item_size ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (item_size), \ |
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0, (count), \ |
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NULL, &error ) ) |
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#define FT_MEM_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (itmsz), \ |
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(oldcnt), (newcnt), \ |
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(ptr), &error ) ) |
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#define FT_MEM_SET_ERROR( cond ) ( (cond), error != 0 ) |
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#define FT_MEM_SET( dest, byte, count ) ft_memset( dest, byte, count ) |
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#define FT_MEM_COPY( dest, source, count ) ft_memcpy( dest, source, count ) |
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#define FT_MEM_MOVE( dest, source, count ) ft_memmove( dest, source, count ) |
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#define FT_MEM_ZERO( dest, count ) FT_MEM_SET( dest, 0, count ) |
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#define FT_ZERO( p ) FT_MEM_ZERO( p, sizeof ( *(p) ) ) |
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#define FT_ARRAY_ZERO( dest, count ) \ |
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FT_MEM_ZERO( dest, (count) * sizeof ( *(dest) ) ) |
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#define FT_ARRAY_COPY( dest, source, count ) \ |
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FT_MEM_COPY( dest, source, (count) * sizeof ( *(dest) ) ) |
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#define FT_ARRAY_MOVE( dest, source, count ) \ |
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FT_MEM_MOVE( dest, source, (count) * sizeof ( *(dest) ) ) |
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/* |
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* Return the maximum number of addressable elements in an array. |
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* We limit ourselves to INT_MAX, rather than UINT_MAX, to avoid |
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* any problems. |
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*/ |
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#define FT_ARRAY_MAX( ptr ) ( FT_INT_MAX / sizeof ( *(ptr) ) ) |
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#define FT_ARRAY_CHECK( ptr, count ) ( (count) <= FT_ARRAY_MAX( ptr ) ) |
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/*************************************************************************/ |
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/* */ |
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/* The following functions macros expect that their pointer argument is */ |
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/* _typed_ in order to automatically compute array element sizes. */ |
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/* */ |
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#define FT_MEM_NEW_ARRAY( ptr, count ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ), \ |
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0, (count), \ |
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NULL, &error ) ) |
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#define FT_MEM_RENEW_ARRAY( ptr, cursz, newsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ), \ |
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(cursz), (newsz), \ |
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(ptr), &error ) ) |
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#define FT_MEM_QNEW_ARRAY( ptr, count ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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0, (count), \ |
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NULL, &error ) ) |
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#define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \ |
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FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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(cursz), (newsz), \ |
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(ptr), &error ) ) |
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#define FT_ALLOC( ptr, size ) \ |
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FT_MEM_SET_ERROR( FT_MEM_ALLOC( ptr, size ) ) |
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#define FT_REALLOC( ptr, cursz, newsz ) \ |
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FT_MEM_SET_ERROR( FT_MEM_REALLOC( ptr, cursz, newsz ) ) |
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#define FT_ALLOC_MULT( ptr, count, item_size ) \ |
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FT_MEM_SET_ERROR( FT_MEM_ALLOC_MULT( ptr, count, item_size ) ) |
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#define FT_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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FT_MEM_SET_ERROR( FT_MEM_REALLOC_MULT( ptr, oldcnt, \ |
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newcnt, itmsz ) ) |
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#define FT_QALLOC( ptr, size ) \ |
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FT_MEM_SET_ERROR( FT_MEM_QALLOC( ptr, size ) ) |
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#define FT_QREALLOC( ptr, cursz, newsz ) \ |
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FT_MEM_SET_ERROR( FT_MEM_QREALLOC( ptr, cursz, newsz ) ) |
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#define FT_QALLOC_MULT( ptr, count, item_size ) \ |
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FT_MEM_SET_ERROR( FT_MEM_QALLOC_MULT( ptr, count, item_size ) ) |
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#define FT_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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FT_MEM_SET_ERROR( FT_MEM_QREALLOC_MULT( ptr, oldcnt, \ |
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newcnt, itmsz ) ) |
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#define FT_FREE( ptr ) FT_MEM_FREE( ptr ) |
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#define FT_NEW( ptr ) FT_MEM_SET_ERROR( FT_MEM_NEW( ptr ) ) |
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#define FT_NEW_ARRAY( ptr, count ) \ |
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FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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#define FT_RENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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#define FT_QNEW( ptr ) \ |
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FT_MEM_SET_ERROR( FT_MEM_QNEW( ptr ) ) |
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#define FT_QNEW_ARRAY( ptr, count ) \ |
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FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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#define FT_QRENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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#ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
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FT_BASE( FT_Error ) |
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FT_Alloc( FT_Memory memory, |
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FT_Long size, |
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void* *P ); |
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FT_BASE( FT_Error ) |
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FT_QAlloc( FT_Memory memory, |
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FT_Long size, |
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void* *p ); |
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FT_BASE( FT_Error ) |
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FT_Realloc( FT_Memory memory, |
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FT_Long current, |
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FT_Long size, |
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void* *P ); |
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FT_BASE( FT_Error ) |
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FT_QRealloc( FT_Memory memory, |
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FT_Long current, |
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FT_Long size, |
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void* *p ); |
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FT_BASE( void ) |
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FT_Free( FT_Memory memory, |
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void* *P ); |
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#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
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FT_BASE( FT_Pointer ) |
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ft_mem_strdup( FT_Memory memory, |
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const char* str, |
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FT_Error *p_error ); |
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FT_BASE( FT_Pointer ) |
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ft_mem_dup( FT_Memory memory, |
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const void* address, |
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FT_ULong size, |
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FT_Error *p_error ); |
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#define FT_MEM_STRDUP( dst, str ) \ |
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(dst) = (char*)ft_mem_strdup( memory, (const char*)(str), &error ) |
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#define FT_STRDUP( dst, str ) \ |
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FT_MEM_SET_ERROR( FT_MEM_STRDUP( dst, str ) ) |
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#define FT_MEM_DUP( dst, address, size ) \ |
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(dst) = ft_mem_dup( memory, (address), (FT_ULong)(size), &error ) |
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#define FT_DUP( dst, address, size ) \ |
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FT_MEM_SET_ERROR( FT_MEM_DUP( dst, address, size ) ) |
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/* Return >= 1 if a truncation occurs. */ |
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/* Return 0 if the source string fits the buffer. */ |
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/* This is *not* the same as strlcpy(). */ |
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FT_BASE( FT_Int ) |
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ft_mem_strcpyn( char* dst, |
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const char* src, |
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FT_ULong size ); |
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#define FT_STRCPYN( dst, src, size ) \ |
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ft_mem_strcpyn( (char*)dst, (const char*)(src), (FT_ULong)(size) ) |
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/* */ |
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FT_END_HEADER |
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#endif /* __FTMEMORY_H__ */ |
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/* END */ |