Edit
kc3-lang/freetype/builds/vms/ftsystem.c
Werner Lemberg
- builds/vms/ftsystem.c
-
/***************************************************************************/ /* */ /* ftsystem.c */ /* */ /* VMS-specific FreeType low-level system interface (body). */ /* */ /* Copyright (C) 1996-2025 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. */ /* */ /***************************************************************************/ #include <ft2build.h> /* we use our special ftconfig.h file, not the standard one */ #include <ftconfig.h> #include <freetype/internal/ftdebug.h> #include <freetype/ftsystem.h> #include <freetype/fterrors.h> #include <freetype/fttypes.h> #include <freetype/internal/ftobjs.h> /* memory-mapping includes and definitions */ #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #include <sys/mman.h> #ifndef MAP_FILE #define MAP_FILE 0x00 #endif #ifdef MUNMAP_USES_VOIDP #define MUNMAP_ARG_CAST void * #else #define MUNMAP_ARG_CAST char * #endif #ifdef NEED_MUNMAP_DECL #ifdef __cplusplus extern "C" #else extern #endif int munmap( char* addr, int len ); #define MUNMAP_ARG_CAST char * #endif /* NEED_DECLARATION_MUNMAP */ #include <sys/types.h> #include <sys/stat.h> #ifdef HAVE_FCNTL_H #include <fcntl.h> #endif #include <stdio.h> #include <stdlib.h> #include <string.h> /*************************************************************************/ /* */ /* MEMORY MANAGEMENT INTERFACE */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Function> */ /* ft_alloc */ /* */ /* <Description> */ /* The memory allocation function. */ /* */ /* <Input> */ /* memory :: A pointer to the memory object. */ /* */ /* size :: The requested size in bytes. */ /* */ /* <Return> */ /* The address of newly allocated block. */ /* */ FT_CALLBACK_DEF( void* ) ft_alloc( FT_Memory memory, long size ) { FT_UNUSED( memory ); return malloc( size ); } /*************************************************************************/ /* */ /* <Function> */ /* ft_realloc */ /* */ /* <Description> */ /* The memory reallocation function. */ /* */ /* <Input> */ /* memory :: A pointer to the memory object. */ /* */ /* cur_size :: The current size of the allocated memory block. */ /* */ /* new_size :: The newly requested size in bytes. */ /* */ /* block :: The current address of the block in memory. */ /* */ /* <Return> */ /* The address of the reallocated memory block. */ /* */ FT_CALLBACK_DEF( void* ) ft_realloc( FT_Memory memory, long cur_size, long new_size, void* block ) { FT_UNUSED( memory ); FT_UNUSED( cur_size ); return realloc( block, new_size ); } /*************************************************************************/ /* */ /* <Function> */ /* ft_free */ /* */ /* <Description> */ /* The memory release function. */ /* */ /* <Input> */ /* memory :: A pointer to the memory object. */ /* */ /* block :: The address of block in memory to be freed. */ /* */ FT_CALLBACK_DEF( void ) ft_free( FT_Memory memory, void* block ) { FT_UNUSED( memory ); free( block ); } /*************************************************************************/ /* */ /* RESOURCE MANAGEMENT INTERFACE */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ /* messages during execution. */ /* */ #undef FT_COMPONENT #define FT_COMPONENT io /* We use the macro STREAM_FILE for convenience to extract the */ /* system-specific stream handle from a given FreeType stream object */ #define STREAM_FILE( stream ) ( (FILE*)stream->descriptor.pointer ) /*************************************************************************/ /* */ /* <Function> */ /* ft_close_stream */ /* */ /* <Description> */ /* The function to close a stream. */ /* */ /* <Input> */ /* stream :: A pointer to the stream object. */ /* */ FT_CALLBACK_DEF( void ) ft_close_stream( FT_Stream stream ) { munmap( (MUNMAP_ARG_CAST)stream->descriptor.pointer, stream->size ); stream->descriptor.pointer = NULL; stream->size = 0; stream->base = NULL; } /* documentation is in ftobjs.h */ FT_BASE_DEF( FT_Error ) FT_Stream_Open( FT_Stream stream, const char* filepathname ) { int file; struct stat stat_buf; if ( !stream ) return FT_THROW( Invalid_Stream_Handle ); /* open the file */ file = open( filepathname, O_RDONLY ); if ( file < 0 ) { FT_ERROR(( "FT_Stream_Open:" )); FT_ERROR(( " could not open `%s'\n", filepathname )); return FT_THROW( Cannot_Open_Resource ); } if ( fstat( file, &stat_buf ) < 0 ) { FT_ERROR(( "FT_Stream_Open:" )); FT_ERROR(( " could not `fstat' file `%s'\n", filepathname )); goto Fail_Map; } stream->size = stat_buf.st_size; if ( !stream->size ) { FT_ERROR(( "FT_Stream_Open:" )); FT_ERROR(( " opened `%s' but zero-sized\n", filepathname )); goto Fail_Map; } stream->pos = 0; stream->base = (unsigned char *)mmap( NULL, stream->size, PROT_READ, MAP_FILE | MAP_PRIVATE, file, 0 ); if ( stream->base == MAP_FAILED ) { FT_ERROR(( "FT_Stream_Open:" )); FT_ERROR(( " could not `mmap' file `%s'\n", filepathname )); goto Fail_Map; } close( file ); stream->descriptor.pointer = stream->base; stream->pathname.pointer = (char*)filepathname; stream->close = ft_close_stream; stream->read = NULL; FT_TRACE1(( "FT_Stream_Open:" )); FT_TRACE1(( " opened `%s' (%d bytes) successfully\n", filepathname, stream->size )); return FT_Err_Ok; Fail_Map: close( file ); stream->base = NULL; stream->size = 0; stream->pos = 0; return FT_THROW( Cannot_Open_Stream ); } #ifdef FT_DEBUG_MEMORY extern FT_Int ft_mem_debug_init( FT_Memory memory ); extern void ft_mem_debug_done( FT_Memory memory ); #endif /* documentation is in ftobjs.h */ FT_BASE_DEF( FT_Memory ) FT_New_Memory( void ) { FT_Memory memory; memory = (FT_Memory)malloc( sizeof ( *memory ) ); if ( memory ) { memory->user = NULL; memory->alloc = ft_alloc; memory->realloc = ft_realloc; memory->free = ft_free; #ifdef FT_DEBUG_MEMORY ft_mem_debug_init( memory ); #endif } return memory; } /* documentation is in ftobjs.h */ FT_BASE_DEF( void ) FT_Done_Memory( FT_Memory memory ) { #ifdef FT_DEBUG_MEMORY ft_mem_debug_done( memory ); #endif memory->free( memory, memory ); } /* END */