Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/builds/unix/ftsystem.c

Index: third_party/freetype2/src/builds/unix/ftsystem.c
diff --git a/third_party/freetype2/src/builds/unix/ftsystem.c b/third_party/freetype2/src/builds/unix/ftsystem.c
new file mode 100644
index 0000000000000000000000000000000000000000..d7513d9e9638fe7f5cf1f4450174c2260a3d0362
--- /dev/null
+++ b/third_party/freetype2/src/builds/unix/ftsystem.c
@@ -0,0 +1,420 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftsystem.c                                                             */
+/*                                                                         */
+/*    Unix-specific FreeType low-level system interface (body).            */
+/*                                                                         */
+/*  Copyright 1996-2015 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 FT_INTERNAL_DEBUG_H
+#include FT_SYSTEM_H
+#include FT_ERRORS_H
+#include FT_TYPES_H
+#include FT_INTERNAL_STREAM_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>
+#include <errno.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  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_by_munmap                                          */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The function to close a stream which is opened by mmap.            */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    stream :: A pointer to the stream object.                          */
+  /*                                                                       */
+  FT_CALLBACK_DEF( void )
+  ft_close_stream_by_munmap( FT_Stream  stream )
+  {
+    munmap( (MUNMAP_ARG_CAST)stream->descriptor.pointer, stream->size );
+
+    stream->descriptor.pointer = NULL;
+    stream->size               = 0;
+    stream->base               = 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    ft_close_stream_by_free                                            */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The function to close a stream which is created by ft_alloc.       */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    stream :: A pointer to the stream object.                          */
+  /*                                                                       */
+  FT_CALLBACK_DEF( void )
+  ft_close_stream_by_free( FT_Stream  stream )
+  {
+    ft_free( NULL, stream->descriptor.pointer );
+
+    stream->descriptor.pointer = NULL;
+    stream->size               = 0;
+    stream->base               = 0;
+  }
+
+
+  /* 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 );
+    }
+
+    /* Here we ensure that a "fork" will _not_ duplicate   */
+    /* our opened input streams on Unix.  This is critical */
+    /* since it avoids some (possible) access control      */
+    /* issues and cleans up the kernel file table a bit.   */
+    /*                                                     */
+#ifdef F_SETFD
+#ifdef FD_CLOEXEC
+    (void)fcntl( file, F_SETFD, FD_CLOEXEC );
+#else
+    (void)fcntl( file, F_SETFD, 1 );
+#endif /* FD_CLOEXEC */
+#endif /* F_SETFD */
+
+    if ( fstat( file, &stat_buf ) < 0 )
+    {
+      FT_ERROR(( "FT_Stream_Open:" ));
+      FT_ERROR(( " could not `fstat' file `%s'\n", filepathname ));
+      goto Fail_Map;
+    }
+
+    /* XXX: TODO -- real 64bit platform support                        */
+    /*                                                                 */
+    /* `stream->size' is typedef'd to unsigned long (in `ftsystem.h'); */
+    /* `stat_buf.st_size', however, is usually typedef'd to off_t      */
+    /* (in sys/stat.h).                                                */
+    /* On some platforms, the former is 32bit and the latter is 64bit. */
+    /* To avoid overflow caused by fonts in huge files larger than     */
+    /* 2GB, do a test.  Temporary fix proposed by Sean McBride.        */
+    /*                                                                 */
+    if ( stat_buf.st_size > LONG_MAX )
+    {
+      FT_ERROR(( "FT_Stream_Open: file is too big\n" ));
+      goto Fail_Map;
+    }
+    else if ( stat_buf.st_size == 0 )
+    {
+      FT_ERROR(( "FT_Stream_Open: zero-length file\n" ));
+      goto Fail_Map;
+    }
+
+    /* This cast potentially truncates a 64bit to 32bit! */
+    stream->size = (unsigned long)stat_buf.st_size;
+    stream->pos  = 0;
+    stream->base = (unsigned char *)mmap( NULL,
+                                          stream->size,
+                                          PROT_READ,
+                                          MAP_FILE | MAP_PRIVATE,
+                                          file,
+                                          0 );
+
+    /* on some RTOS, mmap might return 0 */
+    if ( (long)stream->base != -1 && stream->base != NULL )
+      stream->close = ft_close_stream_by_munmap;
+    else
+    {
+      ssize_t  total_read_count;
+
+
+      FT_ERROR(( "FT_Stream_Open:" ));
+      FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));
+
+      stream->base = (unsigned char*)ft_alloc( NULL, stream->size );
+
+      if ( !stream->base )
+      {
+        FT_ERROR(( "FT_Stream_Open:" ));
+        FT_ERROR(( " could not `alloc' memory\n" ));
+        goto Fail_Map;
+      }
+
+      total_read_count = 0;
+      do
+      {
+        ssize_t  read_count;
+
+
+        read_count = read( file,
+                           stream->base + total_read_count,
+                           stream->size - total_read_count );
+
+        if ( read_count <= 0 )
+        {
+          if ( read_count == -1 && errno == EINTR )
+            continue;
+
+          FT_ERROR(( "FT_Stream_Open:" ));
+          FT_ERROR(( " error while `read'ing file `%s'\n", filepathname ));
+          goto Fail_Read;
+        }
+
+        total_read_count += read_count;
+
+      } while ( (unsigned long)total_read_count != stream->size );
+
+      stream->close = ft_close_stream_by_free;
+    }
+
+    close( file );
+
+    stream->descriptor.pointer = stream->base;
+    stream->pathname.pointer   = (char*)filepathname;
+
+    stream->read = 0;
+
+    FT_TRACE1(( "FT_Stream_Open:" ));
+    FT_TRACE1(( " opened `%s' (%d bytes) successfully\n",
+                filepathname, stream->size ));
+
+    return FT_Err_Ok;
+
+  Fail_Read:
+    ft_free( NULL, stream->base );
+
+  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    = 0;
+      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 */