From ca8937d7d269c0ef8881d2ac7a227fdb990a5753 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Wed, 15 Jan 2014 16:13:07 +0100
Subject: bstr: add function for splitting UTF-8

---
 bstr/bstr.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'bstr/bstr.c')

diff --git a/bstr/bstr.c b/bstr/bstr.c
index aacbdc7dbc..964934a100 100644
--- a/bstr/bstr.c
+++ b/bstr/bstr.c
@@ -296,6 +296,17 @@ int bstr_decode_utf8(struct bstr s, struct bstr *out_next)
     return codepoint;
 }
 
+struct bstr bstr_split_utf8(struct bstr str, struct bstr *out_next)
+{
+    bstr rest;
+    int code = bstr_decode_utf8(str, &rest);
+    if (code < 0)
+        return (bstr){0};
+    if (out_next)
+        *out_next = rest;
+    return bstr_splice(str, 0, str.len - rest.len);
+}
+
 int bstr_validate_utf8(struct bstr s)
 {
     while (s.len) {
-- 
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