murmurhash.h in digest-murmurhash-0.2.2

- old
+ new

@@ -17,7 +17,45 @@
 	Data_Get_Struct(self, buffer_t, name); \
 	if (name == NULL) { \
 		rb_raise(rb_eArgError, "NULL found for " # name " when shouldn't be.'"); \
 	}
 
+/*
+ * from https://github.com/ruby/ruby/blob/trunk/ext/digest/digest.c
+ * Copyright (C) 1995-2001 Yukihiro Matsumoto
+ * Copyright (C) 2001-2006 Akinori MUSHA
+ */
+static VALUE
+hexencode_str_new(VALUE str_digest)
+{
+	char *digest;
+	size_t digest_len;
+	size_t i;
+	VALUE str;
+	char *p;
+	static const char hex[] = {
+		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+		'a', 'b', 'c', 'd', 'e', 'f'
+	};
+
+	StringValue(str_digest);
+	digest = RSTRING_PTR(str_digest);
+	digest_len = RSTRING_LEN(str_digest);
+
+	if (LONG_MAX / 2 < digest_len) {
+		rb_raise(rb_eRuntimeError, "digest string too long");
+	}
+
+	str = rb_usascii_str_new(0, digest_len * 2);
+
+	for (i = 0, p = RSTRING_PTR(str); i < digest_len; i++) {
+		unsigned char byte = digest[i];
+
+		p[i + i]     = hex[byte >> 4];
+		p[i + i + 1] = hex[byte & 0x0f];
+	}
+
+	return str;
+}
+
 #endif /* ifndef MURMURHASH_INCLUDED */
 