Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/builds/amiga/src/base/ftsystem.c

Index: third_party/freetype2/src/builds/amiga/src/base/ftsystem.c
diff --git a/third_party/freetype2/src/builds/amiga/src/base/ftsystem.c b/third_party/freetype2/src/builds/amiga/src/base/ftsystem.c
new file mode 100644
index 0000000000000000000000000000000000000000..bb3ccfd132ec79db1d0c41beca87d9cb0ab8983b
--- /dev/null
+++ b/third_party/freetype2/src/builds/amiga/src/base/ftsystem.c
@@ -0,0 +1,530 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftsystem.c                                                             */
+/*                                                                         */
+/*    Amiga-specific FreeType low-level system interface (body).           */
+/*                                                                         */
+/*  Copyright 1996-2015 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 <TetiSoft@apg.lahn.de>                   */
+  /*                                                                       */
+  /* 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 <proto/exec.h>
+#include <dos/stdio.h>
+#include <proto/dos.h>
+#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 <ft2build.h>
+#include FT_CONFIG_CONFIG_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_SYSTEM_H
+#include FT_ERRORS_H
+#include FT_TYPES_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /*                       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().                     */
+  /*                                                                       */
+  /*************************************************************************/
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <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 )
+  {
+#ifdef __amigaos4__
+    return AllocVecPooled( memory->user, size );
+#else
+    return Alloc_VecPooled( memory->user, size );
+#endif
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <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 )
+  {
+    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;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <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 )
+  {
+#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 )
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    ft_amiga_stream_close                                              */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The function to close a stream.                                    */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    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;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    ft_amiga_stream_io                                                 */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The function to open a stream.                                     */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    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.             */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    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_THROW( 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_THROW( 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_THROW( 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_THROW( 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_THROW( 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_THROW( 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 */