[PATCH v3 10/15] ref-filter: introduce parse_align_position()

[Karthik Nayak <karthik.188@gmail.com>]

>From align_atom_parser() form parse_align_position() which given a
string would give us the alignment position. This is a preparatory
patch as to introduce prefixes for the %(align) atom and avoid
redundancy in the code.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Karthik Nayak <Karthik.188@gmail.com>
---
 ref-filter.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index fa081a8..ccad4c3 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -74,6 +74,17 @@ static void color_atom_parser(struct used_atom *atom)
 		die(_("invalid color value: %s"), atom->u.color);
 }
 
+static align_type parse_align_position(const char *s)
+{
+	if (!strcmp(s, "right"))
+		return ALIGN_RIGHT;
+	else if (!strcmp(s, "middle"))
+		return ALIGN_MIDDLE;
+	else if (!strcmp(s, "left"))
+		return ALIGN_LEFT;
+	return -1;
+}
+
 static void align_atom_parser(struct used_atom *atom)
 {
 	struct align *align = &atom->u.align;
@@ -90,16 +101,13 @@ static void align_atom_parser(struct used_atom *atom)
 	align->position = ALIGN_LEFT;
 
 	while (*s) {
+		int position;
 		buf = s[0]->buf;
 
 		if (!strtoul_ui(buf, 10, (unsigned int *)&width))
 			;
-		else if (!strcmp(buf, "left"))
-			align->position = ALIGN_LEFT;
-		else if (!strcmp(buf, "right"))
-			align->position = ALIGN_RIGHT;
-		else if (!strcmp(buf, "middle"))
-			align->position = ALIGN_MIDDLE;
+		else if ((position = parse_align_position(buf)) >= 0)
+			align->position = position;
 		else
 			die(_("unrecognized %%(align) argument: %s"), buf);
 		s++;
-- 
2.6.4