From 414bc3c6db05ec6d5127967eae39dbaa7f48ad2c Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Fri, 3 Feb 2023 23:16:18 -0600
Subject: implement kai_tag_get_attr

---
 src/xml/CMakeLists.txt |  7 +++++++
 src/xml/xml.c          | 13 +++++++++++++
 src/xml/xml.h          |  5 +++++
 src/xml/xml.test.c     | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+)
 create mode 100644 src/xml/xml.test.c

(limited to 'src/xml')

diff --git a/src/xml/CMakeLists.txt b/src/xml/CMakeLists.txt
index 9790692..8c5efb5 100644
--- a/src/xml/CMakeLists.txt
+++ b/src/xml/CMakeLists.txt
@@ -5,3 +5,10 @@ target_sources(kalmia PUBLIC
 	kalmia.lex.c
 	xml.c
 )
+
+if (KALMIA_BUILD_TESTS)
+	target_sources(
+		kalmia-tests PUBLIC
+		xml.test.c
+	)
+endif()
diff --git a/src/xml/xml.c b/src/xml/xml.c
index e2aa008..33782c4 100644
--- a/src/xml/xml.c
+++ b/src/xml/xml.c
@@ -18,3 +18,16 @@ struct kai_tag_t * kai_parse_string(const char *str)
 
 	return document;
 }
+
+
+char * kai_tag_get_attr(struct kai_tag_t *t, const char *attr)
+{
+	struct kai_attr_t *a = t->attrs;
+	while (a != NULL) {
+		if (strcmp(a->key, attr) == 0) {
+			return a->value;
+		}
+		a = a->next;
+	}
+	return NULL;
+}
diff --git a/src/xml/xml.h b/src/xml/xml.h
index 238177e..e2abf8f 100644
--- a/src/xml/xml.h
+++ b/src/xml/xml.h
@@ -8,4 +8,9 @@
 
 struct kai_tag_t * kai_parse_string(const char *str);
 
+/* return pointer to the attribute's value string, or NULL if it
+ * isn't present
+ */
+char * kai_tag_get_attr(struct kai_tag_t *t, const char *attr);
+
 #endif
diff --git a/src/xml/xml.test.c b/src/xml/xml.test.c
new file mode 100644
index 0000000..acee4b4
--- /dev/null
+++ b/src/xml/xml.test.c
@@ -0,0 +1,34 @@
+#include <string.h>
+
+#include <kalmia.h>
+#include "xml.h"
+#include "test/test.h"
+
+
+LILY_FILE_BEGIN(xml_suite)
+
+
+LILY_TEST("get xml attributes")
+{
+	struct kai_tag_t *t = kai_parse_string(
+		"<tag attr1=\"hello\" attr2=\"world\"></tag>"
+	);
+
+	char *attr1 = kai_tag_get_attr(t, "attr1");
+	REQUIRE_NEQ(attr1, NULL, "%p");
+	CHECK_EQS(attr1, "hello");
+	
+	char *attr2 = kai_tag_get_attr(t, "attr2");
+	REQUIRE_NEQ(attr2, NULL, "%p");
+	CHECK_EQS(attr2, "world");
+
+	char *attr3 = kai_tag_get_attr(t, "attr3");
+	CHECK_EQ(attr3, NULL, "%p");
+
+	kai_tag_destroy(t);
+}
+#include LILY_PUSH_TEST()
+
+
+#define LILY_FILE_END
+#include LILY_REGISTER_TESTS()
-- 
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