ubgpsuite/lonetix/utf/utflen.c

54 lines
1.4 KiB
C
Executable File

// SPDX-License-Identifier: LGPL-3.0-or-later
/**
* \file utf/utflen.c
*
* Implements `utflen()`.
*
* \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
* \author Lorenzo Cogotti
*/
/*
* This work is derived from Plan 9 libutf, see utf/utf.h for details.
* Original license terms follow:
*
* The authors of this software are Rob Pike and Ken Thompson.
* Copyright (c) 2002 by Lucent Technologies.
* Permission to use, copy, modify, and distribute this software for any
* purpose without fee is hereby granted, provided that this entire notice
* is included in all copies of any software which is or includes a copy
* or modification of this software and in all copies of the supporting
* documentation for such software.
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
* ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
*
* The original libutf library is available at: https://9fans.github.io/plan9port/unix/libutf.tgz
*/
#include "utf/utf.h"
size_t utflen(const char *s)
{
size_t n = 0;
while (TRUE) {
Rune r = *(const Uint8 *) s;
if (r < RUNE_SELF) {
if (r == '\0')
break;
s++;
} else {
s += chartorune(&r, s);
}
n++;
}
return n;
}