From 43b2081b8d5e23c8582e2729f18ccd7555be8a40 Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Sat, 30 Jan 2016 11:50:24 +0000
Subject: Add lwc_string_tolower() API.

---
 include/libwapcaplet/libwapcaplet.h | 10 ++++++++++
 src/libwapcaplet.c                  | 19 +++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/include/libwapcaplet/libwapcaplet.h b/include/libwapcaplet/libwapcaplet.h
index 4c0fc71..c0e8c29 100644
--- a/include/libwapcaplet/libwapcaplet.h
+++ b/include/libwapcaplet/libwapcaplet.h
@@ -105,6 +105,16 @@ extern lwc_error lwc_intern_substring(lwc_string *str,
                                       size_t ssoffset, size_t sslen,
                                       lwc_string **ret);
 
+/**
+ * Optain a lowercased lwc_string from given lwc_string.
+ *
+ * @param str  String to create lowercase string from.
+ * @param ret  Pointer to ::lwc_string pointer to fill out.
+ * @return     Result of operation, if not OK then the value pointed
+ *             to by \a ret will not be valid.
+ */
+extern lwc_error lwc_string_tolower(lwc_string *str, lwc_string **ret);
+
 /**
  * Increment the reference count on an lwc_string.
  *
diff --git a/src/libwapcaplet.c b/src/libwapcaplet.c
index 9360f23..9521e96 100644
--- a/src/libwapcaplet.c
+++ b/src/libwapcaplet.c
@@ -164,6 +164,25 @@ lwc_intern_substring(lwc_string *str,
 	return lwc_intern_string(CSTR_OF(str) + ssoffset, sslen, ret);
 }
 
+lwc_error
+lwc_string_tolower(lwc_string *str, lwc_string **ret)
+{
+	assert(str);
+	assert(ret);
+
+	/* Internally make use of knowledge that insensitive strings
+	 * are lower case. */
+	if (str->insensitive == NULL) {
+		lwc_error error = lwc__intern_caseless_string(str);
+		if (error != lwc_error_ok) {
+			return error;
+		}
+	}
+
+	*ret = lwc_string_ref(str->insensitive);
+	return lwc_error_ok;
+}
+
 void
 lwc_string_destroy(lwc_string *str)
 {
-- 
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