From c3f21572ed18b9319aeba0fc5caf4a6394fd3905 Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Sun, 17 Mar 2013 22:01:42 +0000
Subject: Add function to get the byte length of n characters in a utf8 string.

---
 utils/utf8.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'utils/utf8.c')

diff --git a/utils/utf8.c b/utils/utf8.c
index b4e308044..885ca94ee 100644
--- a/utils/utf8.c
+++ b/utils/utf8.c
@@ -117,6 +117,24 @@ size_t utf8_bounded_length(const char *s, size_t l)
 	return len;
 }
 
+/**
+ * Calculate the length (in bytes) of a bounded UTF-8 string
+ *
+ * \param s  The string
+ * \param l  Maximum length of input (in bytes)
+ * \param c  Maximum number of characters to measure
+ * \return Length of string, in bytes
+ */
+size_t utf8_bounded_byte_length(const char *s, size_t l, size_t c)
+{
+	size_t len = 0;
+
+	while (len < l && c-- > 0)
+		len = utf8_next(s, l, len);
+
+	return len;
+}
+
 /**
  * Calculate the length (in bytes) of a UTF-8 character
  *
-- 
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