From 129bd2f44410c602da5fc8374083dec390d99e3e Mon Sep 17 00:00:00 2001
From: Pavol Babincak <scroolik@gmail.com>
Date: Fri, 7 Apr 2006 22:06:17 +0200
Subject: [PATCH] Added function utf8_ptr2chars for counting number of
 characters in string.

---
 src/intl/charsets.c | 24 ++++++++++++++++++++++++
 src/intl/charsets.h |  1 +
 2 files changed, 25 insertions(+)

diff --git a/src/intl/charsets.c b/src/intl/charsets.c
index 085b2d4f1..52c9dfd04 100644
--- a/src/intl/charsets.c
+++ b/src/intl/charsets.c
@@ -299,6 +299,30 @@ utf8_ptr2cells(unsigned char *string, unsigned char *end)
 	return cells;
 }
 
+/* Count number of characters in string. */
+int
+utf8_ptr2chars(unsigned char *string, unsigned char *end)
+{
+	int charlen, chars = 0;
+
+	if (end == NULL)
+		end = strchr(string, '\0');
+
+	if(!string || !end)
+		return -1;
+
+	do {
+		charlen = utf8charlen(string);
+		if (string + charlen > end) 
+			break;
+
+		chars++;
+		string += charlen;
+	} while (1);
+
+	return chars;
+}
+
 /*
  * Count number of bytes from begining of the string needed for displaying
  * specified number of cells.
diff --git a/src/intl/charsets.h b/src/intl/charsets.h
index 5a26d43a7..2b5380b3f 100644
--- a/src/intl/charsets.h
+++ b/src/intl/charsets.h
@@ -58,6 +58,7 @@ inline unsigned char *encode_utf_8(unicode_val_T);
 inline int utf8charlen(const unsigned char *);
 int utf8_char2cells(unsigned char *, unsigned char *);
 int utf8_ptr2cells(unsigned char *, unsigned char *);
+int utf8_ptr2chars(unsigned char *, unsigned char *);
 int utf8_cells2bytes(unsigned char *, int, unsigned char *);
 inline int unicode_to_cell(unicode_val_T);
 inline int strlen_utf8(unsigned char **);