98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/* Copyright (C) 2000-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.org>, 2000.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <assert.h>
|
|
#include <langinfo.h>
|
|
#include <string.h>
|
|
|
|
/* Look up the value of the next multibyte character and return its numerical
|
|
value if it is one of the digits known in the locale. If *DECIDED is
|
|
-1 this means it is not yet decided which form it is and we have to
|
|
search through all available digits. Otherwise we know which script
|
|
the digits are from. */
|
|
static inline int
|
|
indigit_value (const char **s, size_t *len, int *decided)
|
|
{
|
|
int from_level;
|
|
int to_level;
|
|
const char *mbdigits[10];
|
|
int i;
|
|
int n;
|
|
|
|
if (*decided != -1)
|
|
from_level = to_level = *decided;
|
|
else
|
|
{
|
|
from_level = 0;
|
|
to_level = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_INDIGITS_MB_LEN) - 1;
|
|
assert (from_level <= to_level);
|
|
}
|
|
|
|
/* In this round we get the pointer to the digit strings and also perform
|
|
the first round of comparisons. */
|
|
for (n = 0; n < 10; ++n)
|
|
{
|
|
size_t dlen;
|
|
|
|
/* Get the string for the digits with value N. */
|
|
mbdigits[n] = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_INDIGITS0_MB + n);
|
|
dlen = strlen (mbdigits[n]);
|
|
|
|
if (from_level == 0 && dlen <= *len
|
|
&& memcmp (*s, mbdigits[n], dlen) == 0)
|
|
{
|
|
/* Found it. */
|
|
*s += dlen;
|
|
*len -= dlen;
|
|
if (*decided == -1)
|
|
*decided = 0;
|
|
return n;
|
|
}
|
|
|
|
/* Advance the pointer to the next string. */
|
|
mbdigits[n] += dlen + 1;
|
|
}
|
|
|
|
/* Now perform the remaining tests. */
|
|
for (i = 1; i <= to_level; ++i)
|
|
{
|
|
/* Search all ten digits of this level. */
|
|
for (n = 0; n < 10; ++n)
|
|
{
|
|
size_t dlen = strlen (mbdigits[n]);
|
|
|
|
if (i >= from_level && dlen <= *len
|
|
&& memcmp (*s, mbdigits[n], dlen) == 0)
|
|
{
|
|
/* Found it. */
|
|
*s += dlen;
|
|
*len -= dlen;
|
|
if (*decided == -1)
|
|
*decided = from_level;
|
|
return n;
|
|
}
|
|
|
|
/* Advance the pointer to the next string. */
|
|
mbdigits[n] += dlen + 1;
|
|
}
|
|
}
|
|
|
|
/* If we reach this point no matching digit was found. */
|
|
return -1;
|
|
}
|