shithub: freetype+ttf2subf

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* include/freetype/internal/ftmemory.h (FT_OFFSET): New macro.

Use this for `base + offset' pointer calculations where `base' can
be NULL (triggering a sanitizer warning even if the resulting
pointer gets never dereferenced since it is undefined behaviour
in C).

Suggested by Ben Wagner.

git/fs: mount .git/fs: mount/attach disallowed

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,14 @@

+2019-11-23  Werner Lemberg  <[email protected]>

+

+	* include/freetype/internal/ftmemory.h (FT_OFFSET): New macro.

+

+	Use this for `base + offset' pointer calculations where `base' can

+	be NULL (triggering a sanitizer warning even if the resulting

+	pointer gets never dereferenced since it is undefined behaviour

+	in C).

+

+	Suggested by Ben Wagner.

+

 2019-11-23  Ben Wagner  <[email protected]>

 	[sfnt] Ensure OTTO fonts have tables (#57285).

--- a/include/freetype/internal/ftmemory.h

+++ b/include/freetype/internal/ftmemory.h

@@ -57,6 +57,14 @@

   /*************************************************************************/

+  /* The calculation `NULL + n' is undefined in C.  Even if the resulting */

+  /* pointer doesn't get dereferenced, this causes warnings with          */

+  /* sanitizers.                                                          */

+  /*                                                                      */

+  /* We thus provide a macro that should be used if `base' can be NULL.   */

+#define FT_OFFSET( base, count )  ( (base) ? (base) + (count) : NULL )

+

+

   /*

    * C++ refuses to handle statements like p = (void*)anything, with `p' a

    * typed pointer.  Since we don't have a `typeof' operator in standard C++,