[PATCH v11 02/13] ref-filter: print output to strbuf for formatting

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

Introduce a strbuf `output` which will act as a substitute rather than
printing directly to stdout. This will be used for formatting
eventually.

Rename some functions to reflect the changes made:
print_value() -> append_atom()
emit()        -> append_literal()

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 ref-filter.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index e53c77e..edfb1c7 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1195,30 +1195,25 @@ void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
 	qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
 }
 
-static void print_value(struct atom_value *v, int quote_style)
+static void append_atom(struct atom_value *v, int quote_style, struct strbuf *output)
 {
-	struct strbuf sb = STRBUF_INIT;
 	switch (quote_style) {
 	case QUOTE_NONE:
-		fputs(v->s, stdout);
+		strbuf_addstr(output, v->s);
 		break;
 	case QUOTE_SHELL:
-		sq_quote_buf(&sb, v->s);
+		sq_quote_buf(output, v->s);
 		break;
 	case QUOTE_PERL:
-		perl_quote_buf(&sb, v->s);
+		perl_quote_buf(output, v->s);
 		break;
 	case QUOTE_PYTHON:
-		python_quote_buf(&sb, v->s);
+		python_quote_buf(output, v->s);
 		break;
 	case QUOTE_TCL:
-		tcl_quote_buf(&sb, v->s);
+		tcl_quote_buf(output, v->s);
 		break;
 	}
-	if (quote_style != QUOTE_NONE) {
-		fputs(sb.buf, stdout);
-		strbuf_release(&sb);
-	}
 }
 
 static int hex1(char ch)
@@ -1239,7 +1234,7 @@ static int hex2(const char *cp)
 		return -1;
 }
 
-static void emit(const char *cp, const char *ep)
+static void append_literal(const char *cp, const char *ep, struct strbuf *output)
 {
 	while (*cp && (!ep || cp < ep)) {
 		if (*cp == '%') {
@@ -1248,13 +1243,13 @@ static void emit(const char *cp, const char *ep)
 			else {
 				int ch = hex2(cp + 1);
 				if (0 <= ch) {
-					putchar(ch);
+					strbuf_addch(output, ch);
 					cp += 3;
 					continue;
 				}
 			}
 		}
-		putchar(*cp);
+		strbuf_addch(output, *cp);
 		cp++;
 	}
 }
@@ -1262,19 +1257,20 @@ static void emit(const char *cp, const char *ep)
 void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
 {
 	const char *cp, *sp, *ep;
+	struct strbuf output = STRBUF_INIT;
 
 	for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
 		struct atom_value *atomv;
 
 		ep = strchr(sp, ')');
 		if (cp < sp)
-			emit(cp, sp);
+			append_literal(cp, sp, &output);
 		get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
-		print_value(atomv, quote_style);
+		append_atom(atomv, quote_style, &output);
 	}
 	if (*cp) {
 		sp = cp + strlen(cp);
-		emit(cp, sp);
+		append_literal(cp, sp, &output);
 	}
 	if (need_color_reset_at_eol) {
 		struct atom_value resetv;
@@ -1283,9 +1279,11 @@ void show_ref_array_item(struct ref_array_item *info, const char *format, int qu
 		if (color_parse("reset", color) < 0)
 			die("BUG: couldn't parse 'reset' as a color");
 		resetv.s = color;
-		print_value(&resetv, quote_style);
+		append_atom(&resetv, quote_style, &output);
 	}
+	fwrite(output.buf, 1, output.len, stdout);
 	putchar('\n');
+	strbuf_release(&output);
 }
 
 /*  If no sorting option is given, use refname to sort as default */
-- 
2.5.0