chore: libunicode -> libutf

1 files changed, 31 insertions, 0 deletions

diff --git a/sys/libutf/find.c b/sys/libutf/find.c
new file mode 100644
index 0000000..d75feb8
--- /dev/null
+++ b/sys/libutf/find.c
@@ -0,0 +1,31 @@
+#include "internal.h"
+
+byte*
+utf8·find(byte* s, rune c)
+{
+    long c1;
+    rune r;
+    int  n;
+
+    if(c < Tx)
+        return strchr(s, c);
+
+    for(;;){
+        c1 = *(ubyte*)s;
+        if(c1 < Tx){
+            if(c1 == 0) return nil;
+            if(c1 == c) return s;
+            s++;
+            continue;
+        }
+
+        n = utf8·decode(s, &r);
+
+        if(r == c)
+            return s;
+
+        s += n;
+    }
+
+    return nil;
+}