fc-emoji-subtract

gistfile1.txt

# fc-emoji-subtract copyright marguerite@opensuse.org
# description: it calculates the charset of emoji fonts installed on your system and find what need to subtract for you specified font
diff --git a/Makefile.am b/Makefile.am
index 6d4cd32..70c61a0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,7 +22,7 @@
 #  PERFORMANCE OF THIS SOFTWARE.
 
 SUBDIRS=fontconfig fc-case fc-lang src \
-	fc-cache fc-cat fc-conflist fc-list fc-match \
+	fc-cache fc-cat fc-conflist fc-list fc-emoji-subtract fc-match \
 	fc-pattern fc-query fc-scan fc-validate conf.d \
 	its po po-conf test
 if ENABLE_DOCS
diff --git a/configure.ac b/configure.ac
index 60871dc..b37649a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -821,6 +821,7 @@ fc-cache/Makefile
 fc-cat/Makefile
 fc-conflist/Makefile
 fc-list/Makefile
+fc-emoji-subtract/Makefile
 fc-match/Makefile
 fc-pattern/Makefile
 fc-query/Makefile
diff --git a/fc-emoji-subtract/Makefile.am b/fc-emoji-subtract/Makefile.am
new file mode 100644
index 0000000..28695b7
--- /dev/null
+++ b/fc-emoji-subtract/Makefile.am
@@ -0,0 +1,35 @@
+# 
+#  fontconfig/fc-list/Makefile.am
+# 
+#  Copyright © 2003 Keith Packard
+# 
+#  Permission to use, copy, modify, distribute, and sell this software and its
+#  documentation for any purpose is hereby granted without fee, provided that
+#  the above copyright notice appear in all copies and that both that
+#  copyright notice and this permission notice appear in supporting
+#  documentation, and that the name of the author(s) not be used in
+#  advertising or publicity pertaining to distribution of the software without
+#  specific, written prior permission.  The authors make no
+#  representations about the suitability of this software for any purpose.  It
+#  is provided "as is" without express or implied warranty.
+# 
+#  THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+#  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+#  EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+#  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+#  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+#  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+#  PERFORMANCE OF THIS SOFTWARE.
+FC_LIST_SRC=${top_srcdir}/fc-emoji-subtract
+
+bin_PROGRAMS=fc-emoji-subtract
+
+AM_CPPFLAGS=-I${top_srcdir} $(WARN_CFLAGS)
+
+CLEANFILES =
+
+fc_emoji_subtract_LDADD = ${top_builddir}/src/libfontconfig.la
+
+all-local:
+
+-include $(top_srcdir)/git.mk
diff --git a/fc-emoji-subtract/fc-emoji-subtract.c b/fc-emoji-subtract/fc-emoji-subtract.c
new file mode 100644
index 0000000..d18115c
--- /dev/null
+++ b/fc-emoji-subtract/fc-emoji-subtract.c
@@ -0,0 +1,79 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fontconfig/fontconfig.h>
+
+int main(int argc, char **argv){
+  FcFontSet* fs;
+  FcPattern* pat;
+  FcObjectSet* os;
+
+  FcChar8* strpat = (FcChar8*)":lang=und-zsye";
+  pat = FcNameParse(strpat);
+  os = FcObjectSetBuild(FC_FAMILY, FC_CHARSET, FC_FILE, (char*)0);
+
+  fs = FcFontList(0, pat, os);
+
+  FcPatternDestroy(pat);
+  FcObjectSetDestroy(os);
+
+  FcCharSet* cs = FcCharSetCreate();
+  int i;
+  for(i=0; i<fs->nfont; i++){
+    FcCharSet* tmp;
+    if (FcPatternGetCharSet(fs->fonts[i], FC_CHARSET, 0, &tmp) != FcResultMatch) {
+      goto nofont;
+    }
+    cs = FcCharSetUnion(cs, tmp);
+  }
+
+  FcFontSetDestroy(fs);
+
+  FcPattern* pat1;
+  FcFontSet* fs1;
+  FcObjectSet* os1;
+
+  if (argc == 1) {
+    printf("you have to specify a font family to subtract.\n");
+    goto nofont;
+  }
+
+  FcChar8* strpat1 = (FcChar8*)argv[1];
+  pat1 = FcNameParse(strpat1);
+  os1 = FcObjectSetBuild(FC_FAMILY, FC_CHARSET, FC_FILE, (char*)0);
+  fs1 = FcFontList(0, pat1, os1);
+
+  FcPatternDestroy(pat1);
+  FcObjectSetDestroy(os1);
+
+  FcCharSet* cs1 = FcCharSetCreate();
+  for(i=0; i<fs1->nfont; i++){
+    if (FcPatternGetCharSet(fs1->fonts[i], FC_CHARSET, 0, &cs1) != FcResultMatch) {
+      goto nofont; 
+    }
+  }
+  
+  FcFontSetDestroy(fs1);
+
+  FcCharSet* cs2 = FcCharSetCreate();
+  cs2 = FcCharSetIntersect(cs1, cs);
+
+  FcStrBuf buf;
+  FcChar8 init_buf[1024];
+  FcStrBufInit(&buf, init_buf, sizeof(init_buf));
+
+  if (FcNameUnparseCharSet(&buf, cs2) && FcStrBufChar(&buf, '\0')) {
+    printf("%s\n", buf.buf);
+  } else {
+    printf("charset (alloc error)\n");
+  }
+
+  FcStrBufDestroy(&buf);
+  FcCharSetDestroy(cs);
+  FcCharSetDestroy(cs1);
+  FcCharSetDestroy(cs2);
+  
+  return 0;
+
+nofont:
+  return 1;
+}
diff --git a/fontconfig/fontconfig.h b/fontconfig/fontconfig.h
index 09292a3..15cae3f 100644
--- a/fontconfig/fontconfig.h
+++ b/fontconfig/fontconfig.h
@@ -494,6 +494,27 @@ FcConfigFileInfoIterGet (FcConfig		*config,
 			 FcChar8		**description,
 			 FcBool			*enabled);
 
+typedef struct _FcStrBuf {
+    FcChar8 *buf;
+    FcBool  allocated;
+    FcBool  failed;
+    int     len;
+    int     size;
+    FcChar8 buf_static[16 * sizeof (void *)];
+} FcStrBuf;
+
+FcPublic FcBool
+FcNameUnparseCharSet (FcStrBuf *buf, const FcCharSet *c);
+
+FcPublic void
+FcStrBufInit (FcStrBuf *buf, FcChar8 *init, int size);
+
+FcPublic void
+FcStrBufDestroy (FcStrBuf *buf);
+
+FcPublic FcBool 
+FcStrBufChar (FcStrBuf *buf, FcChar8 c);
+
 /* fccharset.c */
 FcPublic FcCharSet*
 FcCharSetCreate (void);
diff --git a/src/fcint.h b/src/fcint.h
index c615b66..8c66ad3 100644
--- a/src/fcint.h
+++ b/src/fcint.h
@@ -397,14 +397,14 @@ struct _FcStrList {
     int		    n;
 };
 
-typedef struct _FcStrBuf {
+/*typedef struct _FcStrBuf {
     FcChar8 *buf;
     FcBool  allocated;
     FcBool  failed;
     int	    len;
     int	    size;
     FcChar8 buf_static[16 * sizeof (void *)];
-} FcStrBuf;
+} FcStrBuf;*/
 
 typedef struct _FcHashTable	FcHashTable;