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-rw-r--r--libguile/strings.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/libguile/strings.c b/libguile/strings.c
index 2e5647e6d..dc2e4f5fe 100644
--- a/libguile/strings.c
+++ b/libguile/strings.c
@@ -1,5 +1,5 @@
/* Copyright (C) 1995, 1996, 1998, 2000, 2001, 2004, 2006,
- * 2008-2015 Free Software Foundation, Inc.
+ * 2008-2016 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -2065,6 +2065,38 @@ u32_u8_length_in_bytes (const scm_t_uint32 *str, size_t len)
return ret;
}
+static size_t
+utf8_length (SCM str)
+{
+ if (scm_i_is_narrow_string (str))
+ return latin1_u8_strlen ((scm_t_uint8 *) scm_i_string_chars (str),
+ scm_i_string_length (str));
+ else
+ return u32_u8_length_in_bytes
+ ((scm_t_uint32 *) scm_i_string_wide_chars (str),
+ scm_i_string_length (str));
+}
+
+size_t
+scm_c_string_utf8_length (SCM string)
+#define FUNC_NAME "scm_c_string_utf8_length"
+{
+ SCM_VALIDATE_STRING (1, string);
+ return utf8_length (string);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_string_utf8_length, "string-utf8-length", 1, 0, 0,
+ (SCM string),
+ "Returns the number of bytes in the UTF-8 representation of "
+ "@var{string}.")
+#define FUNC_NAME s_scm_string_utf8_length
+{
+ SCM_VALIDATE_STRING (1, string);
+ return scm_from_size_t (utf8_length (string));
+}
+#undef FUNC_NAME
+
char *
scm_to_utf8_stringn (SCM str, size_t *lenp)
#define FUNC_NAME "scm_to_utf8_stringn"