[PATCH 07/20] cat-file: reuse parse_ref_filter_atom

[Olga Telezhnaya <olyatelezhnaya@xxxxxxxxx>]

Continue migrating formatting logic from cat-file to ref-filter.
Reuse parse_ref_filter_atom for unifying all processes in ref-filter
and further reducing of expand_atom_into_fields function.

Signed-off-by: Olga Telezhnaia <olyatelezhnaya@xxxxxxxxx>
Mentored-by: Christian Couder <christian.couder@xxxxxxxxx>
Mentored by: Jeff King <peff@xxxxxxxx>
---
 ref-filter.c | 73 +++++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 45 insertions(+), 28 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index 98bb10185ae96..2bd9a8fc4e39c 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -100,6 +100,7 @@ static struct used_atom {
 	} u;
 } *used_atoms;
 static int used_atom_cnt, need_tagged, need_symref;
+struct expand_data *cat_file_info;
 
 static void color_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *color_value)
 {
@@ -251,6 +252,16 @@ static void objectname_atom_parser(const struct ref_format *format, struct used_
 		die(_("unrecognized %%(objectname) argument: %s"), arg);
 }
 
+static void objectsize_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *arg)
+{
+	if (!arg)
+		; /* default to normal object size */
+	else if (!strcmp(arg, "disk"))
+		cat_file_info->info.disk_sizep = &cat_file_info->disk_size;
+	else
+		die(_("urecognized %%(objectsize) argument: %s"), arg);
+}
+
 static void refname_atom_parser(const struct ref_format *format, struct used_atom *atom, const char *arg)
 {
 	refname_atom_parser_internal(&atom->u.refname, arg, atom->name);
@@ -371,6 +382,14 @@ static struct valid_atom {
 	{ "else" },
 };
 
+static struct valid_atom valid_cat_file_atoms[] = {
+	{ "objectname" },
+	{ "objecttype" },
+	{ "objectsize", FIELD_ULONG, objectsize_atom_parser },
+	{ "rest" },
+	{ "deltabase" },
+};
+
 #define REF_FORMATTING_STATE_INIT  { 0, NULL }
 
 struct ref_formatting_stack {
@@ -392,6 +411,25 @@ struct atom_value {
 	struct used_atom *atom;
 };
 
+static int is_atom(const char *atom, const char *s, int slen)
+{
+	int alen = strlen(atom);
+	return alen == slen && !memcmp(atom, s, alen);
+}
+
+static void expand_atom_into_fields(const char *atom, int len,
+				    struct expand_data *data)
+{
+	if (is_atom("objecttype", atom, len))
+		data->info.typep = &data->type;
+	else if (is_atom("objectsize", atom, len))
+		data->info.sizep = &data->size;
+	else if (is_atom("rest", atom, len))
+		data->split_on_whitespace = 1;
+	else if (is_atom("deltabase", atom, len))
+		data->info.delta_base_sha1 = data->delta_base_oid.hash;
+}
+
 /*
  * Used to parse format string and sort specifiers
  */
@@ -458,6 +496,8 @@ static int parse_ref_filter_atom(const struct ref_format *format,
 		need_tagged = 1;
 	if (!strcmp(valid_atoms[i].name, "symref"))
 		need_symref = 1;
+	if (cat_file_info)
+		expand_atom_into_fields(atom, atom_len, cat_file_info);
 	return at;
 }
 
@@ -693,31 +733,6 @@ static const char *find_next(const char *cp)
 	return NULL;
 }
 
-static int is_atom(const char *atom, const char *s, int slen)
-{
-	int alen = strlen(atom);
-	return alen == slen && !memcmp(atom, s, alen);
-}
-
-static void expand_atom_into_fields(const char *atom, int len,
-				    struct expand_data *data)
-{
-	if (is_atom("objectname", atom, len))
-		; /* do nothing */
-	else if (is_atom("objecttype", atom, len))
-		data->info.typep = &data->type;
-	else if (is_atom("objectsize", atom, len))
-		data->info.sizep = &data->size;
-	else if (is_atom("objectsize:disk", atom, len))
-		data->info.disk_sizep = &data->disk_size;
-	else if (is_atom("rest", atom, len))
-		data->split_on_whitespace = 1;
-	else if (is_atom("deltabase", atom, len))
-		data->info.delta_base_sha1 = data->delta_base_oid.hash;
-	else
-		die("unknown format element: %.*s", len, atom);
-}
-
 /*
  * Make sure the format string is well formed, and parse out
  * the used atoms.
@@ -726,6 +741,7 @@ int verify_ref_format(struct ref_format *format)
 {
 	const char *cp, *sp;
 
+	cat_file_info = format->cat_file_data;
 	format->need_color_reset_at_eol = 0;
 	for (cp = format->format; *cp && (sp = find_next(cp)); ) {
 		const char *color, *ep = strchr(sp, ')');
@@ -736,9 +752,10 @@ int verify_ref_format(struct ref_format *format)
 		/* sp points at "%(" and ep points at the closing ")" */
 
 		if (format->cat_file_data)
-			expand_atom_into_fields(sp + 2, ep - sp - 2,
-						format->cat_file_data);
-		else
+		{
+			at = parse_ref_filter_atom(format, valid_cat_file_atoms,
+						   ARRAY_SIZE(valid_cat_file_atoms), sp + 2, ep);
+		} else
 		{
 			at = parse_ref_filter_atom(format, valid_atoms,
 						   ARRAY_SIZE(valid_atoms), sp + 2, ep);

--
https://github.com/git/git/pull/450