diff options
Diffstat (limited to 'miranda-wine/src/core/memory.c')
| -rw-r--r-- | miranda-wine/src/core/memory.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/miranda-wine/src/core/memory.c b/miranda-wine/src/core/memory.c new file mode 100644 index 0000000..7c55939 --- /dev/null +++ b/miranda-wine/src/core/memory.c @@ -0,0 +1,167 @@ +/*
+
+Miranda IM: the free IM client for Microsoft* Windows*
+
+Copyright 2000-2006 Miranda ICQ/IM project,
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "commonheaders.h"
+
+#define BLOCK_ALLOCED 0xABBABABA
+#define BLOCK_FREED 0xDEADBEEF
+
+static int CheckBlock( void* blk )
+{
+ int result = FALSE;
+ char* p = ( char* )blk - sizeof(DWORD)*2;
+ DWORD size, *b, *e;
+
+ __try
+ {
+ size = *( DWORD* )p;
+ b = ( DWORD* )&p[ sizeof( DWORD ) ];
+ e = ( DWORD* )&p[ sizeof( DWORD )*2 + size ];
+
+ if ( *b != BLOCK_ALLOCED || *e != BLOCK_ALLOCED )
+ {
+ if ( *b == BLOCK_FREED && *e == BLOCK_FREED )
+ OutputDebugStringA( "memory block is already deleted\n" );
+ else
+ OutputDebugStringA( "memory block is corrupted\n" );
+ #if defined( _DEBUG )
+ DebugBreak();
+ #endif
+ }
+ else result = TRUE;
+ }
+ __except( EXCEPTION_EXECUTE_HANDLER )
+ {
+ OutputDebugStringA( "access violation during checking memory block\n" );
+ #if defined( _DEBUG )
+ DebugBreak();
+ #endif
+ }
+
+ return result;
+}
+
+/******************************************************************************/
+
+void* mir_alloc( size_t size )
+{
+ if ( size == 0 )
+ return NULL;
+ {
+ char* p = (char*)malloc( size + sizeof(DWORD)*3 );
+ if ( p == NULL ) {
+ OutputDebugStringA( "memory overflow\n" );
+ #if defined( _DEBUG )
+ DebugBreak();
+ #endif
+ return NULL;
+ }
+
+ *( DWORD* )p = ( DWORD )size;
+ *( DWORD* )&p[ sizeof(DWORD) ] = BLOCK_ALLOCED;
+ *( DWORD* )&p[ size + sizeof(DWORD)*2 ] = BLOCK_ALLOCED;
+ return p + sizeof( DWORD )*2;
+} }
+
+/******************************************************************************/
+
+void* mir_calloc( size_t size )
+{
+ void* p = mir_alloc( size );
+ if ( p != NULL )
+ memset( p, 0, size );
+ return p;
+}
+
+/******************************************************************************/
+
+void* mir_realloc( void* ptr, size_t size )
+{
+ char* p;
+
+ if ( ptr != NULL ) {
+ if ( !CheckBlock( ptr ))
+ return NULL;
+ p = ( char* )ptr - sizeof(DWORD)*2;
+ }
+ else p = NULL;
+
+ p = ( char* )realloc( p, size + sizeof(DWORD)*3 );
+ if ( p == NULL ) {
+ OutputDebugStringA( "memory overflow\n" );
+ #if defined( _DEBUG )
+ DebugBreak();
+ #endif
+ return NULL;
+ }
+
+ *( DWORD* )p = ( DWORD )size;
+ *( DWORD* )&p[ sizeof(DWORD) ] = BLOCK_ALLOCED;
+ *( DWORD* )&p[ size + sizeof(DWORD)*2 ] = BLOCK_ALLOCED;
+ return p + sizeof( DWORD )*2;
+}
+
+/******************************************************************************/
+
+void mir_free( void* ptr )
+{
+ char* p;
+ DWORD size;
+
+ if ( ptr == NULL )
+ return;
+ if ( !CheckBlock( ptr ))
+ return;
+
+ p = ( char* )ptr - sizeof(DWORD)*2;
+ size = *( DWORD* )p;
+ *( DWORD* )&p[ sizeof(DWORD) ] = BLOCK_FREED;
+ *( DWORD* )&p[ size + sizeof(DWORD)*2 ] = BLOCK_FREED;
+ free( p );
+}
+
+/******************************************************************************/
+
+char* mir_strdup( const char* str )
+{
+ if ( str != NULL ) {
+ char* p = mir_alloc( strlen( str )+1 );
+ if ( p )
+ strcpy( p, str );
+ return p;
+ }
+ return NULL;
+}
+
+/******************************************************************************/
+
+WCHAR* mir_wstrdup( const WCHAR* str )
+{
+ if ( str != NULL ) {
+ WCHAR* p = mir_alloc( sizeof( WCHAR )*( wcslen( str )+1 ));
+ if ( p )
+ wcscpy( p, str );
+ return p;
+ }
+ return NULL;
+}
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