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/* Copyright (C) 2001, 2006, 2009, 2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#if defined (HANDLE_MULTIBYTE)
#include <stdlib.h>
#include <limits.h>
#include <shmbutil.h>
#include <shmbchar.h>
#if IS_BASIC_ASCII
/* Bit table of characters in the ISO C "basic character set". */
const unsigned int is_basic_table [UCHAR_MAX / 32 + 1] =
{
0x00001a00, /* '\t' '\v' '\f' */
0xffffffef, /* ' '...'#' '%'...'?' */
0xfffffffe, /* 'A'...'Z' '[' '\\' ']' '^' '_' */
0x7ffffffe /* 'a'...'z' '{' '|' '}' '~' */
/* The remaining bits are 0. */
};
#endif /* IS_BASIC_ASCII */
size_t
mbstrlen (s)
const char *s;
{
size_t clen, nc;
mbstate_t mbs = { 0 }, mbsbak = { 0 };
int f;
nc = 0;
while (*s && (clen = (f = is_basic (*s)) ? 1 : mbrlen(s, MB_CUR_MAX, &mbs)) != 0)
{
if (MB_INVALIDCH(clen))
{
clen = 1; /* assume single byte */
mbs = mbsbak;
}
if (f == 0)
mbsbak = mbs;
s += clen;
nc++;
}
return nc;
}
/* Return pointer to first multibyte char in S, or NULL if none. */
char *
mbsmbchar (s)
const char *s;
{
char *t;
size_t clen;
mbstate_t mbs = { 0 };
for (t = (char *)s; *t; t++)
{
if (is_basic (*t))
continue;
clen = mbrlen (t, MB_CUR_MAX, &mbs);
if (clen == 0)
return 0;
if (MB_INVALIDCH(clen))
continue;
if (clen > 1)
return t;
}
return 0;
}
#endif
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