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reg: .tabs register

Suggested and tested by aksr <[email protected]>.

--- a/reg.c

+++ b/reg.c

@@ -64,6 +64,16 @@

 	return dst;

 }

+static char *num_tabs(void)

+{

+	static char tabs[16 * NTABS];

+	int i;

+	char *s = tabs;

+	for (i = 0; i < NTABS && env->tabs_type[i]; i++)

+		s += sprintf(s, "%du%c ", env->tabs[i], env->tabs_type[i]);

+	return tabs;

+}

+

 static int num_fmt(char *s, int n, int fmt);

 /* the contents of a number register (returns a static buffer) */

@@ -119,6 +129,8 @@

 		sprintf(numbuf, "%02d", *nreg(id));

 		return numbuf;

 	}

+	if (s[0] == '.' && !strcmp(".tabs", s))

+		return num_tabs();

 	if (!nregs_fmt[id] || num_fmt(numbuf, *nreg(id), nregs_fmt[id]))

 		sprintf(numbuf, "%d", *nreg(id));

 	return numbuf;