diff -r f9283dc4860d -r 88f2e05288ba misc/libfreetype/builds/amiga/src/base/ftsystem.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/misc/libfreetype/builds/amiga/src/base/ftsystem.c Mon Apr 25 01:46:54 2011 +0200 @@ -0,0 +1,530 @@ +/***************************************************************************/ +/* */ +/* ftsystem.c */ +/* */ +/* Amiga-specific FreeType low-level system interface (body). */ +/* */ +/* Copyright 1996-2001, 2002, 2005, 2006, 2007, 2010 by */ +/* David Turner, Robert Wilhelm, Werner Lemberg and Detlef Würkner. */ +/* */ +/* 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. */ +/* */ +/***************************************************************************/ + + /*************************************************************************/ + /* */ + /* This file contains the Amiga interface used by FreeType to access */ + /* low-level, i.e. memory management, i/o access as well as thread */ + /* synchronisation. */ + /* */ + /*************************************************************************/ + + + /*************************************************************************/ + /* */ + /* Maintained by Detlef Würkner */ + /* */ + /* Based on the original ftsystem.c, */ + /* modified to avoid fopen(), fclose(), fread(), fseek(), ftell(), */ + /* malloc(), realloc(), and free(). */ + /* */ + /* Those C library functions are often not thread-safe or cant be */ + /* used in a shared Amiga library. If that's not a problem for you, */ + /* you can of course use the default ftsystem.c with C library calls */ + /* instead. */ + /* */ + /* This implementation needs exec V39+ because it uses AllocPooled() etc */ + /* */ + /*************************************************************************/ + +#define __NOLIBBASE__ +#define __NOGLOBALIFACE__ +#define __USE_INLINE__ +#include +#include +#include +#ifdef __amigaos4__ +extern struct ExecIFace *IExec; +extern struct DOSIFace *IDOS; +#else +extern struct Library *SysBase; +extern struct Library *DOSBase; +#endif + +#define IOBUF_SIZE 512 + +/* structure that helps us to avoid + * useless calls of Seek() and Read() + */ +struct SysFile +{ + BPTR file; + ULONG iobuf_start; + ULONG iobuf_end; + UBYTE iobuf[IOBUF_SIZE]; +}; + +#ifndef __amigaos4__ +/* C implementation of AllocVecPooled (see autodoc exec/AllocPooled) */ +APTR +Alloc_VecPooled( APTR poolHeader, + ULONG memSize ) +{ + ULONG newSize = memSize + sizeof ( ULONG ); + ULONG *mem = AllocPooled( poolHeader, newSize ); + + if ( !mem ) + return NULL; + *mem = newSize; + return mem + 1; +} + +/* C implementation of FreeVecPooled (see autodoc exec/AllocPooled) */ +void +Free_VecPooled( APTR poolHeader, + APTR memory ) +{ + ULONG *realmem = (ULONG *)memory - 1; + + FreePooled( poolHeader, realmem, *realmem ); +} +#endif + +#include +#include FT_CONFIG_CONFIG_H +#include FT_INTERNAL_DEBUG_H +#include FT_SYSTEM_H +#include FT_ERRORS_H +#include FT_TYPES_H + +#include +#include +#include + + + /*************************************************************************/ + /* */ + /* MEMORY MANAGEMENT INTERFACE */ + /* */ + /*************************************************************************/ + + /*************************************************************************/ + /* */ + /* It is not necessary to do any error checking for the */ + /* allocation-related functions. This is done by the higher level */ + /* routines like ft_mem_alloc() or ft_mem_realloc(). */ + /* */ + /*************************************************************************/ + + + /*************************************************************************/ + /* */ + /* */ + /* ft_alloc */ + /* */ + /* */ + /* The memory allocation function. */ + /* */ + /* */ + /* memory :: A pointer to the memory object. */ + /* */ + /* size :: The requested size in bytes. */ + /* */ + /* */ + /* The address of newly allocated block. */ + /* */ + FT_CALLBACK_DEF( void* ) + ft_alloc( FT_Memory memory, + long size ) + { +#ifdef __amigaos4__ + return AllocVecPooled( memory->user, size ); +#else + return Alloc_VecPooled( memory->user, size ); +#endif + } + + + /*************************************************************************/ + /* */ + /* */ + /* ft_realloc */ + /* */ + /* */ + /* The memory reallocation function. */ + /* */ + /* */ + /* 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. */ + /* */ + /* */ + /* The address of the reallocated memory block. */ + /* */ + FT_CALLBACK_DEF( void* ) + ft_realloc( FT_Memory memory, + long cur_size, + long new_size, + void* block ) + { + void* new_block; + +#ifdef __amigaos4__ + new_block = AllocVecPooled ( memory->user, new_size ); +#else + new_block = Alloc_VecPooled ( memory->user, new_size ); +#endif + if ( new_block != NULL ) + { + CopyMem ( block, new_block, + ( new_size > cur_size ) ? cur_size : new_size ); +#ifdef __amigaos4__ + FreeVecPooled ( memory->user, block ); +#else + Free_VecPooled ( memory->user, block ); +#endif + } + return new_block; + } + + + /*************************************************************************/ + /* */ + /* */ + /* ft_free */ + /* */ + /* */ + /* The memory release function. */ + /* */ + /* */ + /* 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 ) + { +#ifdef __amigaos4__ + FreeVecPooled( memory->user, block ); +#else + Free_VecPooled( memory->user, block ); +#endif + } + + + /*************************************************************************/ + /* */ + /* 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 ) ( (struct SysFile *)stream->descriptor.pointer ) + + + /*************************************************************************/ + /* */ + /* */ + /* ft_amiga_stream_close */ + /* */ + /* */ + /* The function to close a stream. */ + /* */ + /* */ + /* stream :: A pointer to the stream object. */ + /* */ + FT_CALLBACK_DEF( void ) + ft_amiga_stream_close( FT_Stream stream ) + { + struct SysFile* sysfile; + + sysfile = STREAM_FILE( stream ); + Close ( sysfile->file ); + FreeMem ( sysfile, sizeof ( struct SysFile )); + + stream->descriptor.pointer = NULL; + stream->size = 0; + stream->base = 0; + } + + + /*************************************************************************/ + /* */ + /* */ + /* ft_amiga_stream_io */ + /* */ + /* */ + /* The function to open a stream. */ + /* */ + /* */ + /* stream :: A pointer to the stream object. */ + /* */ + /* offset :: The position in the data stream to start reading. */ + /* */ + /* buffer :: The address of buffer to store the read data. */ + /* */ + /* count :: The number of bytes to read from the stream. */ + /* */ + /* */ + /* The number of bytes actually read. */ + /* */ + FT_CALLBACK_DEF( unsigned long ) + ft_amiga_stream_io( FT_Stream stream, + unsigned long offset, + unsigned char* buffer, + unsigned long count ) + { + struct SysFile* sysfile; + unsigned long read_bytes; + + if ( count != 0 ) + { + sysfile = STREAM_FILE( stream ); + + /* handle the seek */ + if ( (offset < sysfile->iobuf_start) || (offset + count > sysfile->iobuf_end) ) + { + /* requested offset implies we need a buffer refill */ + if ( !sysfile->iobuf_end || offset != sysfile->iobuf_end ) + { + /* a physical seek is necessary */ + Seek( sysfile->file, offset, OFFSET_BEGINNING ); + } + sysfile->iobuf_start = offset; + sysfile->iobuf_end = 0; /* trigger a buffer refill */ + } + + /* handle the read */ + if ( offset + count <= sysfile->iobuf_end ) + { + /* we have buffer and requested bytes are all inside our buffer */ + CopyMem( &sysfile->iobuf[offset - sysfile->iobuf_start], buffer, count ); + read_bytes = count; + } + else + { + /* (re)fill buffer */ + if ( count <= IOBUF_SIZE ) + { + /* requested bytes is a subset of the buffer */ + read_bytes = Read( sysfile->file, sysfile->iobuf, IOBUF_SIZE ); + if ( read_bytes == -1UL ) + { + /* error */ + read_bytes = 0; + } + else + { + sysfile->iobuf_end = offset + read_bytes; + CopyMem( sysfile->iobuf, buffer, count ); + if ( read_bytes > count ) + { + read_bytes = count; + } + } + } + else + { + /* we actually need more than our buffer can hold, so we decide + ** to do a single big read, and then copy the last IOBUF_SIZE + ** bytes of that to our internal buffer for later use */ + read_bytes = Read( sysfile->file, buffer, count ); + if ( read_bytes == -1UL ) + { + /* error */ + read_bytes = 0; + } + else + { + ULONG bufsize; + + bufsize = ( read_bytes > IOBUF_SIZE ) ? IOBUF_SIZE : read_bytes; + sysfile->iobuf_end = offset + read_bytes; + sysfile->iobuf_start = sysfile->iobuf_end - bufsize; + CopyMem( &buffer[read_bytes - bufsize] , sysfile->iobuf, bufsize ); + } + } + } + } + else + { + read_bytes = 0; + } + + return read_bytes; + } + + + /* documentation is in ftobjs.h */ + + FT_BASE_DEF( FT_Error ) + FT_Stream_Open( FT_Stream stream, + const char* filepathname ) + { + struct FileInfoBlock* fib; + struct SysFile* sysfile; + + + if ( !stream ) + return FT_Err_Invalid_Stream_Handle; + +#ifdef __amigaos4__ + sysfile = AllocMem ( sizeof (struct SysFile ), MEMF_SHARED ); +#else + sysfile = AllocMem ( sizeof (struct SysFile ), MEMF_PUBLIC ); +#endif + if ( !sysfile ) + { + FT_ERROR(( "FT_Stream_Open:" )); + FT_ERROR(( " could not open `%s'\n", filepathname )); + + return FT_Err_Cannot_Open_Resource; + } + sysfile->file = Open( (STRPTR)filepathname, MODE_OLDFILE ); + if ( !sysfile->file ) + { + FreeMem ( sysfile, sizeof ( struct SysFile )); + FT_ERROR(( "FT_Stream_Open:" )); + FT_ERROR(( " could not open `%s'\n", filepathname )); + + return FT_Err_Cannot_Open_Resource; + } + + fib = AllocDosObject( DOS_FIB, NULL ); + if ( !fib ) + { + Close ( sysfile->file ); + FreeMem ( sysfile, sizeof ( struct SysFile )); + FT_ERROR(( "FT_Stream_Open:" )); + FT_ERROR(( " could not open `%s'\n", filepathname )); + + return FT_Err_Cannot_Open_Resource; + } + if ( !( ExamineFH( sysfile->file, fib ) ) ) + { + FreeDosObject( DOS_FIB, fib ); + Close ( sysfile->file ); + FreeMem ( sysfile, sizeof ( struct SysFile )); + FT_ERROR(( "FT_Stream_Open:" )); + FT_ERROR(( " could not open `%s'\n", filepathname )); + + return FT_Err_Cannot_Open_Resource; + } + stream->size = fib->fib_Size; + FreeDosObject( DOS_FIB, fib ); + + stream->descriptor.pointer = (void *)sysfile; + stream->pathname.pointer = (char*)filepathname; + sysfile->iobuf_start = 0; + sysfile->iobuf_end = 0; + stream->pos = 0; + + stream->read = ft_amiga_stream_io; + stream->close = ft_amiga_stream_close; + + if ( !stream->size ) + { + ft_amiga_stream_close( stream ); + FT_ERROR(( "FT_Stream_Open:" )); + FT_ERROR(( " opened `%s' but zero-sized\n", filepathname )); + return FT_Err_Cannot_Open_Stream;; + } + + FT_TRACE1(( "FT_Stream_Open:" )); + FT_TRACE1(( " opened `%s' (%ld bytes) successfully\n", + filepathname, stream->size )); + + return FT_Err_Ok; + } + + +#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; + + +#ifdef __amigaos4__ + memory = (FT_Memory)AllocVec( sizeof ( *memory ), MEMF_SHARED ); +#else + memory = (FT_Memory)AllocVec( sizeof ( *memory ), MEMF_PUBLIC ); +#endif + if ( memory ) + { +#ifdef __amigaos4__ + memory->user = CreatePool( MEMF_SHARED, 16384, 16384 ); +#else + memory->user = CreatePool( MEMF_PUBLIC, 16384, 16384 ); +#endif + if ( memory->user == NULL ) + { + FreeVec( memory ); + memory = NULL; + } + else + { + 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 + + DeletePool( memory->user ); + FreeVec( memory ); + } + +/* +Local Variables: +coding: latin-1 +End: +*/ +/* END */