[gtk/wip/otte/json: 33/38] json: Add gtk_json_parser_select_member()
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk/wip/otte/json: 33/38] json: Add gtk_json_parser_select_member()
- Date: Sat, 4 Dec 2021 19:52:53 +0000 (UTC)
commit 244e99ef4c604fc50d122bac2795712750cc0e75
Author: Benjamin Otte <otte redhat com>
Date: Mon Nov 29 09:40:55 2021 +0100
json: Add gtk_json_parser_select_member()
This is modeled after JsonReader.selectName() from the Java Moshi
package, see
https://square.github.io/moshi/1.x/moshi/com/squareup/moshi/JsonReader.html#selectName-com.squareup.moshi.JsonReader.Options-
It returns the ID of the current member name in the passed i char array
or -1 if it is not found.
This allows writing code like:
do {
switch (gtk_json_parser_select_member (parser, { "foo", "bar", NULL })
{
case 0:
/* handle the "foo" member */
break;
case 1:
/* handle the "bar" member */
break;
default:
/* do nothing or complain or whatever */
break;
}
} while (gtk_json_parser_next (parser));
The impementation so far is the simplest one possible, but could be
significantly improved.
gtk/json/gtkjsonparser.c | 24 ++++++++++++++++++++++++
gtk/json/gtkjsonparserprivate.h | 2 ++
2 files changed, 26 insertions(+)
---
diff --git a/gtk/json/gtkjsonparser.c b/gtk/json/gtkjsonparser.c
index d6051b3b9f..8adec028aa 100644
--- a/gtk/json/gtkjsonparser.c
+++ b/gtk/json/gtkjsonparser.c
@@ -870,6 +870,30 @@ gtk_json_parser_get_member_name (GtkJsonParser *self)
return gtk_json_unescape_string (self->block->member_name);
}
+gssize
+gtk_json_parser_select_member (GtkJsonParser *self,
+ const char * const *options)
+{
+ char *member_name;
+ gssize i;
+
+ member_name = gtk_json_parser_get_member_name (self);
+ if (member_name == NULL)
+ return -1;
+
+ for (i = 0; options[i]; i++)
+ {
+ if (strcmp (member_name, options[i]) == 0)
+ break;
+ }
+ if (options[i] == NULL)
+ i = -1;
+
+ g_free (member_name);
+
+ return i;
+}
+
gboolean
gtk_json_parser_get_boolean (GtkJsonParser *self)
{
diff --git a/gtk/json/gtkjsonparserprivate.h b/gtk/json/gtkjsonparserprivate.h
index 854042ad71..f3ff43fd88 100644
--- a/gtk/json/gtkjsonparserprivate.h
+++ b/gtk/json/gtkjsonparserprivate.h
@@ -47,6 +47,8 @@ gboolean gtk_json_parser_next (GtkJsonParser
GtkJsonNode gtk_json_parser_get_node (GtkJsonParser *self);
const GError * gtk_json_parser_get_error (GtkJsonParser *self) G_GNUC_PURE;
char * gtk_json_parser_get_member_name (GtkJsonParser *self);
+gssize gtk_json_parser_select_member (GtkJsonParser *self,
+ const char * const *options);
gboolean gtk_json_parser_get_boolean (GtkJsonParser *self);
double gtk_json_parser_get_number (GtkJsonParser *self);
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