From 0a2a1c695a60554a9aafe40a592ea14953d08572 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Mon, 22 Sep 2025 10:29:01 +0100
Subject: [PATCH] core: error: add function to test if an error has a
 particular vendor/code

---
 core/error.c                   | 14 ++++++++++++++
 core/include/blue/core/error.h |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/core/error.c b/core/error.c
index 12d6064..ede2f76 100644
--- a/core/error.c
+++ b/core/error.c
@@ -38,6 +38,20 @@ static void error_cleanup(void)
 	}
 }
 
+bool b_result_is(
+	struct b_error *err, const b_error_vendor *vendor, b_error_status_code code)
+{
+	if (!err) {
+		return false;
+	}
+
+	if (err->err_vendor != vendor) {
+		return false;
+	}
+
+	return err->err_code == code;
+}
+
 const struct b_error_vendor *b_error_vendor_get_builtin(void)
 {
 	return &builtin_vendor;
diff --git a/core/include/blue/core/error.h b/core/include/blue/core/error.h
index 8ec3071..b052f66 100644
--- a/core/include/blue/core/error.h
+++ b/core/include/blue/core/error.h
@@ -330,6 +330,9 @@ BLUE_API b_error *z__b_error_caused_by(b_error *, b_error *);
 BLUE_API b_error *z__b_error_caused_by_b_status(b_error *, b_status);
 BLUE_API void z__b_error_throw(b_error *, const char *, unsigned int, const char *);
 
+BLUE_API bool b_result_is(
+	b_result result, const b_error_vendor *vendor, b_error_status_code code);
+
 BLUE_API const b_error_vendor *b_error_vendor_get_builtin(void);
 BLUE_API const b_error_vendor *b_error_vendor_get_errno(void);
 BLUE_API const b_error_definition *b_error_vendor_get_error_definition(