shithub: neatroff

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tr: add .chop

--- a/tr.c

+++ b/tr.c

@@ -493,6 +493,24 @@

 		in_lf(args[2], eval(args[1], 0));

 }

+static void tr_chop(char **args)

+{

+	struct sbuf sbuf;

+	int id;

+	if (args[1])

+		in_lf(args[2], eval(args[1], 0));

+	id = map(args[1]);

+	if (str_get(id)) {

+		sbuf_init(&sbuf);

+		sbuf_append(&sbuf, str_get(id));

+		if (!sbuf_empty(&sbuf)) {

+			sbuf_cut(&sbuf, sbuf_len(&sbuf) - 1);

+			str_set(id, sbuf_buf(&sbuf));

+		}

+		sbuf_done(&sbuf);

+	}

+}

+

 /* character translation (.tr) */

 static char cmap_src[NCMAPS][GNLEN];	/* source character */

 static char cmap_dst[NCMAPS][GNLEN];	/* character mapping */

@@ -784,6 +802,7 @@

 	{"ce", tr_ce},

 	{"ch", tr_ch},

 	{"char", tr_char, mkargs_ds},

+	{"chop", tr_chop, mkargs_reg1},

 	{"cl", tr_cl},

 	{"cp", tr_cp},

 	{"cs", tr_cs},