| /* 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; |
| } |
