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	tex: support regular expression groups in :s replacement - neatvi - [fork] simp…
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	---
	commit 9cc9b8bb918f8a581ed57c730a42d4fe85b3152c
	parent df9f5a424f9e869ce1367f3c9ee3ceee84683f9f
	Author: Ali Gholami Rudi <[email protected]>
	Date: Sat, 7 May 2016 21:35:01 +0430

	ex: support regular expression groups in :s replacement

	Diffstat:
	M ex.c \| 21 ++++++++++++++++++++-

	1 file changed, 20 insertions(+), 1 deletion(-)
	---
	diff --git a/ex.c b/ex.c
	t@@ -660,6 +660,25 @@ static int ec_mark(char *ec)
	return 0;
	}

	+static void replace(struct sbuf dst, char rep, char ln, int offs)
	+{
	+ while (rep[0]) {
	+ if (rep[0] == '\\' && rep[1]) {
	+ if (rep[1] >= '0' && rep[1] <= '9') {
	+ int grp = (rep[1] - '0') * 2;
	+ int len = offs[grp + 1] - offs[grp];
	+ sbuf_mem(dst, ln + offs[grp], len);
	+ } else {
	+ sbuf_chr(dst, (unsigned char) rep[1]);
	+ }
	+ rep++;
	+ } else {
	+ sbuf_chr(dst, (unsigned char) rep[0]);
	+ }
	+ rep++;
	+ }
	+}
	+
	static int ec_substitute(char *ec)
	{
	char loc[EXLEN];
	t@@ -697,7 +716,7 @@ static int ec_substitute(char *ec)
	struct sbuf *r = sbuf_make();
	while (rset_find(re, ln, LEN(offs) / 2, offs, 0) >= 0) {
	sbuf_mem(r, ln, offs[0]);
	- sbuf_str(r, rep);
	+ replace(r, rep, ln, offs);
	ln += offs[1];
	if (!strchr(s, 'g'))
	break;