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+/****************************************************************************
+ *
+ * ftmemory.h
+ *
+ * The FreeType memory management macros (specification).
+ *
+ * Copyright (C) 1996-2023 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 <freetype/fttypes.h>
+
+#include "compiler-macros.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 ****/
+ /**** ****/
+ /**** ****/
+ /*************************************************************************/
+ /*************************************************************************/
+ /*************************************************************************/
+
+
+ /* The calculation `NULL + n' is undefined in C. Even if the resulting */
+ /* pointer doesn't get dereferenced, this causes warnings with */
+ /* sanitizers. */
+ /* */
+ /* We thus provide a macro that should be used if `base' can be NULL. */
+#define FT_OFFSET( base, count ) ( (base) ? (base) + (count) : NULL )
+
+
+ /*
+ * C++ refuses to handle statements like p = (void*)anything, with `p' a
+ * typed pointer. Since we don't have a `typeof' operator in standard C++,
+ * we have to use a template to emulate it.
+ */
+
+#ifdef __cplusplus
+
+extern "C++"
+{
+ template <typename T> inline T*
+ cplusplus_typeof( T*,
+ void *v )
+ {
+ return static_cast <T*> ( v );
+ }
+}
+
+#define FT_ASSIGNP( p, val ) (p) = cplusplus_typeof( (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.
+ */
+
+ /* The `q' variants of the functions below (`q' for `quick') don't fill */
+ /* the allocated or reallocated memory with zero bytes. */
+
+ 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 );
+
+
+ /* The `Q' variants of the macros below (`Q' for `quick') don't fill */
+ /* the allocated or reallocated memory with zero bytes. */
+
+#define FT_MEM_ALLOC( ptr, size ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_alloc( memory, \
+ (FT_Long)(size), \
+ &error ) )
+
+#define FT_MEM_FREE( ptr ) \
+ FT_BEGIN_STMNT \
+ FT_DEBUG_INNER( 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, \
+ (FT_Long)(cursz), \
+ (FT_Long)(newsz), \
+ (ptr), \
+ &error ) )
+
+#define FT_MEM_QALLOC( ptr, size ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_qalloc( memory, \
+ (FT_Long)(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, \
+ (FT_Long)(cursz), \
+ (FT_Long)(newsz), \
+ (ptr), \
+ &error ) )
+
+#define FT_MEM_ALLOC_MULT( ptr, count, item_size ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \
+ (FT_Long)(item_size), \
+ 0, \
+ (FT_Long)(count), \
+ NULL, \
+ &error ) )
+
+#define FT_MEM_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \
+ (FT_Long)(itmsz), \
+ (FT_Long)(oldcnt), \
+ (FT_Long)(newcnt), \
+ (ptr), \
+ &error ) )
+
+#define FT_MEM_QALLOC_MULT( ptr, count, item_size ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \
+ (FT_Long)(item_size), \
+ 0, \
+ (FT_Long)(count), \
+ NULL, \
+ &error ) )
+
+#define FT_MEM_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \
+ (FT_Long)(itmsz), \
+ (FT_Long)(oldcnt), \
+ (FT_Long)(newcnt), \
+ (ptr), \
+ &error ) )
+
+
+#define FT_MEM_SET_ERROR( cond ) ( (cond), error != 0 )
+
+
+#define FT_MEM_SET( dest, byte, count ) \
+ ft_memset( dest, byte, (FT_Offset)(count) )
+
+#define FT_MEM_COPY( dest, source, count ) \
+ ft_memcpy( dest, source, (FT_Offset)(count) )
+
+#define FT_MEM_MOVE( dest, source, count ) \
+ ft_memmove( dest, source, (FT_Offset)(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, \
+ (FT_Offset)(count) * sizeof ( *(dest) ) )
+
+#define FT_ARRAY_COPY( dest, source, count ) \
+ FT_MEM_COPY( dest, \
+ source, \
+ (FT_Offset)(count) * sizeof ( *(dest) ) )
+
+#define FT_ARRAY_MOVE( dest, source, count ) \
+ FT_MEM_MOVE( dest, \
+ source, \
+ (FT_Offset)(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, \
+ (FT_Long)(count), \
+ NULL, \
+ &error ) )
+
+#define FT_MEM_RENEW_ARRAY( ptr, cursz, newsz ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \
+ sizeof ( *(ptr) ), \
+ (FT_Long)(cursz), \
+ (FT_Long)(newsz), \
+ (ptr), \
+ &error ) )
+
+#define FT_MEM_QNEW_ARRAY( ptr, count ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \
+ sizeof ( *(ptr) ), \
+ 0, \
+ (FT_Long)(count), \
+ NULL, \
+ &error ) )
+
+#define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \
+ FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \
+ sizeof ( *(ptr) ), \
+ (FT_Long)(cursz), \
+ (FT_Long)(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_QNEW_ARRAY( ptr, count ) )
+
+#define FT_QRENEW_ARRAY( ptr, curcnt, newcnt ) \
+ FT_MEM_SET_ERROR( FT_MEM_QRENEW_ARRAY( ptr, curcnt, newcnt ) )
+
+
+ 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) = (char*)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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-19 05:13:56 +0000