Change SkStream.

include/core/SkOSFile.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 // TODO: add unittests for all these operations
@@ skipping 30 matching lines @@
 */
 bool    sk_frewind(SkFILE*);
 
 size_t  sk_fread(void* buffer, size_t byteCount, SkFILE*);
 size_t  sk_fwrite(const void* buffer, size_t byteCount, SkFILE*);
 
 char*   sk_fgets(char* str, int size, SkFILE* f);
 
 void    sk_fflush(SkFILE*);
 
-int     sk_fseek(SkFILE*, size_t, int);
+bool    sk_fseek(SkFILE*, size_t);
+bool    sk_fmove(SkFILE*, long);
 size_t  sk_ftell(SkFILE*);
 
+/** Maps a file into memory. Returns the address and length on success, NULL otherwise.
+ *  The mapping is read only.
+ */
+void*   sk_fmmap(SkFILE* f, size_t* length);
+
+/** Unmaps a file previously mapped by sk_fmmap.
+ *  The length parameter must be the same as returned from sk_fmmap.
+ */
+void    sk_fmunmap(const void* addr, size_t length);
+
+/** Returns true if the two point at the exact same filesystem object. */
+bool    sk_fidentical(SkFILE* a, SkFILE* b);
+
 // Returns true if something (file, directory, ???) exists at this path.
 bool    sk_exists(const char *path);
 
 // Returns true if a directory exists at this path.
 bool    sk_isdir(const char *path);
 
 // Have we reached the end of the file?
 int sk_feof(SkFILE *);
 
 
@@ skipping 35 matching lines @@
     {
         sk_free(fStr);
     }
     const uint16_t* get() const { return fStr; }
 
 private:
     uint16_t*   fStr;
 };
 
 #endif