/***************************************************************************/
/* */
/* ftsystem.c */
/* */
/* Unix-specific FreeType low-level system interface (body). */
/* */
/* Copyright 1996-2000 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 <ftconfig.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/ftsystem.h>
#include <freetype/fterrors.h>
#include <freetype/fttypes.h>
#include <freetype/internal/ftobjs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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/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> */
/* block :: The address of newly allocated block. */
/* */
LOCAL_FUNC_X
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. */
/* */
LOCAL_FUNC_X
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. */
/* */
LOCAL_FUNC_X
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 trace_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. */
/* */
LOCAL_FUNC_X
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 = 0;
}
/*************************************************************************/
/* */
/* <Function> */
/* FT_New_Stream */
/* */
/* <Description> */
/* Creates a new stream object. */
/* */
/* <Input> */
/* filepathname :: The name of the stream (usually a file) to be */
/* opened. */
/* */
/* stream :: A pointer to the stream object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_EXPORT_FUNC( FT_Error ) FT_New_Stream( const char* filepathname,
FT_Stream stream )
{
int file;
struct stat stat_buf;
if ( !stream )
return FT_Err_Invalid_Stream_Handle;
/* open the file */
file = open( filepathname, O_RDONLY );
if ( file < 0 )
{
FT_ERROR(( "FT_New_Stream:" ));
FT_ERROR(( " could not open `%s'\n", filepathname ));
return FT_Err_Cannot_Open_Resource;
}
if ( fstat( file, &stat_buf ) < 0 )
{
FT_ERROR(( "FT_New_Stream:" ));
FT_ERROR(( " could not `fstat' file `%s'\n", filepathname ));
goto Fail_Map;
}
stream->size = stat_buf.st_size;
stream->pos = 0;
stream->base = (unsigned char *)mmap( NULL,
stream->size,
PROT_READ,
MAP_FILE | MAP_PRIVATE,
file,
0 );
if ( (long)stream->base == -1 )
{
FT_ERROR(( "FT_New_Stream:" ));
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 = 0;
FT_TRACE1(( "FT_New_Stream:" ));
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_Err_Cannot_Open_Stream;
}
/*************************************************************************/
/* */
/* <Function> */
/* FT_New_Memory */
/* */
/* <Description> */
/* Creates a new memory object. */
/* */
/* <Return> */
/* A pointer to the new memory object. 0 in case of error. */
/* */
FT_EXPORT_FUNC( FT_Memory ) FT_New_Memory( void )
{
FT_Memory memory;
memory = (FT_Memory)malloc( sizeof ( *memory ) );
if ( memory )
{
memory->user = 0;
memory->alloc = ft_alloc;
memory->realloc = ft_realloc;
memory->free = ft_free;
}
return memory;
}
/*************************************************************************/
/* */
/* <Function> */
/* FT_Done_Memory */
/* */
/* <Description> */
/* Discards memory manager. */
/* */
/* <Input> */
/* memory :: A handle to the memory manager. */
/* */
FT_EXPORT_FUNC( void ) FT_Done_Memory( FT_Memory memory )
{
free( memory );
}
/* END */
