adding experimental (alpha) exception support code + system code
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3680fd7c5b
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e788049931
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@ -51,33 +51,40 @@ FT_BEGIN_HEADER
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typedef struct FT_CleanupStackRec_
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{
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FT_CleanupItem top;
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FT_CleanupChunk chunk;
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FT_Memory memory;
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FT_CleanupItem top;
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FT_CleanupItem limit;
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FT_CleanupChunk chunk;
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FT_CleanupChunkRec chunk_0; /* avoids stupid dynamic allocation */
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FT_Memory memory;
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} FT_CleanupStackRec, *FT_CleanupStack;
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FT_BASE_DEF( void )
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FT_BASE( void )
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ft_cleanup_stack_push( FT_CleanupStack stack,
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FT_Pointer item,
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FT_CleanupFunc item_func,
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FT_Pointer item_data );
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FT_BASE_DEF( void )
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FT_BASE( void )
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ft_cleanup_stack_pop( FT_CleanupStack stack,
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FT_Int destroy );
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FT_BASE_DEF( FT_Pointer )
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FT_BASE( FT_CleanupItem )
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ft_cleanup_stack_peek( FT_CleanupStack stack );
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FT_BASE_DEF( void )
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FT_BASE( void )
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ft_xhandler_enter( FT_XHandler xhandler,
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FT_Memory memory );
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FT_BASE_DEF( void )
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FT_BASE( void )
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ft_xhandler_exit( FT_XHandler xhandler );
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FT_BASE( void )
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ft_cleanup_throw( FT_CleanupStack stack,
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FT_Error error );
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FT_END_HEADER
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#endif /* __FT_EXCEPT_H__ */
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@ -0,0 +1,168 @@
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#include <ft2build.h>
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#include FT_EXCEPT_H
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FT_BASE_DEF( void )
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ft_cleanup_stack_init( FT_CleanupStack stack,
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FT_Memory memory )
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{
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stack->chunk = &stack->chunk_0;
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stack->top = stack->chunk->items;
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stack->limit = stack->top + FT_CLEANUP_CHUNK_SIZE;
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stack->chunk_0.link = NULL;
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stack->memory = memory;
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}
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FT_BASE_DEF( void )
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ft_cleanup_stack_done( FT_CleanupStack stack )
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{
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FT_Memory memory = stack->memory;
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FT_CleanupChunk chunk, next;
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for (;;)
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{
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chunk = stack->chunk;
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if ( chunk == &stack->chunk_0 )
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break;
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stack->chunk = chunk->link;
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FT_FREE( chunk );
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}
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stack->memory = NULL;
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}
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FT_BASE_DEF( void )
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ft_cleanup_stack_push( FT_CleanupStack stack,
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FT_Pointer item,
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FT_CleanupFunc item_func,
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FT_Pointer item_data )
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{
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FT_CleanupItem top;
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FT_ASSERT( stack && stack->chunk && stack->top );
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FT_ASSERT( item && item_func );
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top = stack->top;
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top->item = item;
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top->item_func = item_func;
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top->item_data = item_data;
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top ++;
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if ( top == stack->limit )
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{
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FT_CleanupChunk chunk;
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FT_Error error;
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if ( FT_ALLOC( chunk, stack->memory ) )
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ft_cleanup_stack_throw( stack, error );
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chunk->link = stack->chunk;
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stack->chunk = chunk;
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stack->limit = chunk->items + FT_CLEANUP_CHUNK_SIZE;
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top = chunk->items;
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}
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stack->top = top;
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}
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FT_BASE_DEF( void )
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ft_cleanup_stack_pop( FT_CleanupStack stack,
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FT_Int destroy )
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{
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FT_CleanupItem top;
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FT_ASSERT( stack && stack->chunk && stack->top );
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top = stack->top;
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if ( top == stack->chunk->items )
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{
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FT_CleanupChunk chunk;
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chunk = stack->chunk;
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if ( chunk == &stack->chunk_0 )
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{
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FT_ERROR(( "cleanup.pop: empty cleanup stack !!\n" ));
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ft_cleanup_throw( stack, FT_Err_EmptyCleanupStack );
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}
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chunk = chunk->link;
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FT_QFree( stack->chunk, stack->memory );
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stack->chunk = chunk;
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stack->limit = chunk->items + FT_CLEANUP_CHUNK_SIZE;
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top = stack->limit;
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}
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top --;
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if ( destroy )
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top->item_func( top->item, top->item_data );
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top->item = NULL;
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top->item_func = NULL;
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top->item_data = NULL;
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stack->top = top;
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}
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FT_BASE_DEF( FT_CleanupItem )
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ft_cleanup_stack_peek( FT_CleanupStack stack )
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{
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FT_CleanupItem top;
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FT_CleanupChunk chunk;
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FT_ASSERT( stack && stack->chunk && stack->top );
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top = stack->top;
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chunk = stack->chunk;
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if ( top > chunk->items )
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top--;
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else
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{
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chunk = chunk->link;
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top = NULL;
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if ( chunk != NULL )
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top = chunk->items + FT_CLEANUP_CHUNK_SIZE - 1;
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}
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return top;
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}
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FT_BASE_DEF( void )
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ft_cleanup_stack_throw( FT_CleanupStack stack, FT_Error error )
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{
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}
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FT_BASE_DEF( void )
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ft_xhandler_enter( FT_XHandler xhandler,
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FT_Memory memory )
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{
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}
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FT_BASE_DEF( void )
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ft_xhandler_exit( FT_XHandler xhandler )
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{
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}
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@ -0,0 +1,131 @@
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#include <ft2build.h>
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#include FT_SYSTEM_STREAM_H
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#include <stdio.h>
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/* the ISO/ANSI standard stream object */
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typedef struct FT_StdStreamRec_
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{
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FT_StreamRec stream;
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FILE* file;
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const char* pathname;
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} FT_StdStreamRec, *FT_StdStream;
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/* read bytes from a standard stream */
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static FT_ULong
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ft_std_stream_read( FT_StdStream stream,
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FT_Byte* buffer,
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FT_ULong size )
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{
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long read_bytes;
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read_bytes = fread( buffer, 1, size, stream->file );
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if ( read_bytes < 0 )
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read_bytes = 0;
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return (FT_ULong) read_bytes;
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}
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/* seek the standard stream to a new position */
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static FT_Error
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ft_std_stream_seek( FT_StdStream stream,
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FT_ULong pos )
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{
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return ( fseek( stream->file, pos, SEEK_SET ) < 0 )
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? FT_Err_Stream_Seek
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: FT_Err_Ok;
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}
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/* close a standard stream */
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static void
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ft_std_stream_done( FT_StdStream stream )
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{
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fclose( stream->file );
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stream->file = NULL;
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stream->pathname = NULL;
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}
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/* open a standard stream from a given pathname */
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static void
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ft_std_stream_init( FT_StdStream stream,
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const char* pathname )
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{
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FT_ASSERT( pathname != NULL );
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stream->file = fopen( pathname, "rb" );
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if ( stream->file == NULL )
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{
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FT_ERROR(( "iso.stream.init: could not open '%s'\n", pathname ));
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FT_XTHROW( FT_Err_Stream_Open );
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}
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/* compute total size in bytes */
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fseek( file, 0, SEEK_END );
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FT_STREAM__SIZE(stream) = ftell( file );
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fseek( file, 0, SEEK_SET );
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stream->pathname = pathname;
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stream->pos = 0;
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FT_TRACE1(( "iso.stream.init: opened '%s' (%ld bytes) succesfully\n",
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pathname, FT_STREAM__SIZE(stream) ));
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}
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static void
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ft_std_stream_class_init( FT_ClassRec* _clazz )
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{
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FT_StreamClassRec* clazz = FT_STREAM_CLASS(_clazz);
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clazz->stream_read = (FT_Stream_ReadFunc) ft_std_stream_read;
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clazz->stream_seek = (FT_Stream_SeekFunc) ft_std_stream_seek;
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}
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static const FT_TypeRec ft_std_stream_type;
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{
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"StreamClass",
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NULL,
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sizeof( FT_ClassRec ),
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ft_stream_class_init,
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NULL,
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sizeof( FT_StdStreamRec ),
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ft_std_stream_init,
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ft_std_stream_done,
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NULL,
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};
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FT_EXPORT_DEF( FT_Stream )
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ft_std_stream_new( FT_Memory memory,
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const char* pathname )
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{
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FT_Class clazz;
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clazz = ft_class_from_type( memory, &ft_std_stream_type );
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return (FT_Stream) ft_object_new( clazz, pathname );
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}
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FT_EXPORT_DEF( void )
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ft_std_stream_create( FT_Memory memory,
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const char* pathname,
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FT_Stream* astream )
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{
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FT_Class clazz;
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clazz = ft_class_from_type( memory, &ft_std_stream_type );
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ft_object_create( clazz, pathname, FT_OBJECT_P(astream) );
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}
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@ -0,0 +1,30 @@
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#include <ft2build.h>
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#include FT_SYSTEM_MEMORY_H
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static FT_Memory
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ft_memory_new_default( FT_ULong size )
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{
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return (FT_Memory) ft_malloc( size );
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}
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static void
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ft_memory_destroy_default( FT_Memory memory )
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{
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ft_free( memory );
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}
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/* notice that in normal builds, we use the ISO C library functions */
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/* 'malloc', 'free' and 'realloc' directly.. */
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/* */
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static const FT_Memory_FuncsRec ft_memory_funcs_default_rec =
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{
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(FT_Memory_CreateFunc) ft_memory_new_iso,
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(FT_Memory_DestroyFunc) ft_memory_destroy_iso,
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(FT_Memory_AllocFunc) ft_malloc,
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(FT_Memory_FreeFunc) ft_free,
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(FT_Memory_ReallocFunc) ft_realloc
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};
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FT_APIVAR_DEF( const FT_Memory_Funcs )
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ft_memory_funcs_default = &ft_memory_funcs_defaults_rec;
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