Add SkData::NewFromFD.

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 36 matching lines @@
 char*   sk_fgets(char* str, int size, SkFILE* f);
 
 void    sk_fflush(SkFILE*);
 
 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.
+ *  When finished with the mapping, free the returned pointer with sk_fmunmap.
  */
 void*   sk_fmmap(SkFILE* f, size_t* length);
 
-/** Unmaps a file previously mapped by sk_fmmap.
+/** Maps a file descriptor into memory. Returns the address and length on success, NULL otherwise.
+ *  The mapping is read only.
+ *  When finished with the mapping, free the returned pointer with sk_fmunmap.
+ */
+void*   sk_fdmmap(int fd, size_t* length);
+
+/** Unmaps a file previously mapped by sk_fmmap or sk_fdmmap.
  *  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 the underlying file descriptor for the given file.
+ *  The return value will be < 0 on failure.
+ */
+int     sk_fileno(SkFILE* f);
+
 // 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 58 matching lines @@
      *  Return the name of the file, ignoring the directory structure.
      *  Behaves like python's os.path.basename. If the fullPath is
      *  /dir/subdir/, an empty string is returned.
      *  @param fullPath Full path to the file.
      *  @return SkString The basename of the file - anything beyond the
      *      final slash, or the full name if there is no slash.
      */
     static SkString SkBasename(const char* fullPath);
 };
 #endif