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trfn: output two-glyph ligatures last

--- a/trfn.c

+++ b/trfn.c

@@ -25,6 +25,7 @@

 static int trfn_noligs;		/* suppress ligatures */

 static int trfn_pos;		/* include glyph positions */

 static char trfn_ligs[8192];	/* font ligatures */

+static char trfn_ligs2[8192];	/* font ligatures, whose length is two */

 static char trfn_trname[256];	/* font troff name */

 static char trfn_psname[256];	/* font ps name */

 /* character type */

@@ -220,6 +221,12 @@

 			strcpy(dst, agl_exceptions[i][1]);

 }

+static void trfn_ligput(char *c)

+{

+	char *dst = strlen(c) == 2 ? trfn_ligs2 : trfn_ligs;

+	sprintf(strchr(dst, '\0'), "%s ", c);

+}

+

 static void trfn_lig(char *c)

 {

 	int i;

@@ -227,12 +234,11 @@

 		if (!strcmp(agl_exceptions[i][1], c))

 			return;

 	if (c[0] && c[1] && strlen(c) > utf8len((unsigned char) c[0])) {

-		sprintf(strchr(trfn_ligs, '\0'), "%s ", c);

+		trfn_ligput(c);

 	} else {

 		for (i = 0; i < LEN(ligs_utf8); i++)

 			if (!strcmp(ligs_utf8[i][0], c))

-				sprintf(strchr(trfn_ligs, '\0'),

-					"%s ", ligs_utf8[i][1]);

+				trfn_ligput(ligs_utf8[i][1]);

 	}

 }

@@ -318,7 +324,7 @@

 		printf("fontname %s\n", trfn_psname);

 	printf("spacewidth %d\n", trfn_swid);

 	if (!trfn_noligs)

-		printf("ligatures %s0\n", trfn_ligs);

+		printf("ligatures %s%s0\n", trfn_ligs, trfn_ligs2);

 	if (trfn_special)

 		printf("special\n");

 	printf("%s", sbuf_buf(&sbuf_char));