From: handa <handa>
Date: Mon, 9 Jul 2007 12:27:01 +0000 (+0000)
Subject: (gstring_subst): Remove a glyph if it is ignored
X-Git-Tag: REL-0-9-7~17
X-Git-Url: http://git.chise.org/gitweb/?p=m17n%2Flibotf.git;a=commitdiff_plain;h=b68e7fd5a397b4968280646110d16c2d9d6e3143

(gstring_subst): Remove a glyph if it is ignored
because of 0 glyph ID.
---

diff --git a/src/otfdrive.c b/src/otfdrive.c
index f917838..44ec9e5 100644
--- a/src/otfdrive.c
+++ b/src/otfdrive.c
@@ -29,14 +29,14 @@ write to the Free Software Foundation, Inc., 59 Temple Place, Suite
 #include "otf.h"
 #include "otferror.h"
 
-/* Return nonzero if OTF_Glyph *G should be ignored according to
-   LookupFlag FLAG.  */
-#define IGNORED_GLYPH(g, flag)			\
-  ((g)->glyph_id == 0				\
-   || ((flag) & (1 << (g)->GlyphClass))		\
-   || (((flag) & OTF_MarkAttachmentType)	\
-       && (g)->GlyphClass == OTF_GlyphClassMark	\
-       && ((flag) >> 8) != (g)->MarkAttachClass))
+/* Return nonzero (-1 if ID is zero, 1 otherwise) if OTF_Glyph *G
+   should be ignored according to LookupFlag FLAG.  */
+#define IGNORED_GLYPH(g, flag)				\
+  ((g)->glyph_id == 0 ? -1				\
+   : (((flag) & (1 << (g)->GlyphClass))			\
+      || (((flag) & OTF_MarkAttachmentType)		\
+	  && (g)->GlyphClass == OTF_GlyphClassMark	\
+	  && ((flag) >> 8) != (g)->MarkAttachClass)))
 
 #define GSTRING_DELETE(gstring, from, len)				\
   do {									\
@@ -81,8 +81,11 @@ gstring_subst (OTF *otf, OTF_GlyphString *gstring, int from, int to, int flag,
   for (i = non_ignored_idx = to - 1; i >= from; i--)
     {
       OTF_Glyph *g = gstring->glyphs + i;
-      if (IGNORED_GLYPH (g, flag))
+
+      if (IGNORED_GLYPH (g, flag) == 1)
 	{
+	  /* Move this glyph to the next of the current target of
+	     substitution.  */
 	  OTF_Glyph temp = *g;
 
 	  memmove (g, g + 1, sizeof (OTF_Glyph) * (non_ignored_idx - i));