shithub: neatroff

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ren: increase the size of ren_back() buffer

This is necessary in schar_jump(), for instance, for \w\(ts\(rn\(ts.

--- a/ren.c

+++ b/ren.c

@@ -23,8 +23,9 @@

 static int ren_div;		/* rendering a diversion */

 static struct wb ren_wb;	/* the main ren.c word buffer */

-static int ren_backed = -1;	/* pushed back character */

 static int ren_nl;		/* just after newline */

+static int ren_unbuf[8];	/* ren_back() buffer */

+static int ren_un;

 static int bp_first = 1;	/* prior to the first page */

 static int bp_next = 1;		/* next page number */

@@ -32,14 +33,12 @@

 static int ren_next(void)

 {

-	int c = ren_backed >= 0 ? ren_backed : tr_next();

-	ren_backed = -1;

-	return c;

+	return ren_un > 0 ? ren_unbuf[--ren_un] : tr_next();

 }

 static void ren_back(int c)

 {

-	ren_backed = c;

+	ren_unbuf[ren_un++] = c;

 }

 void tr_di(char **args)