third-party-mirror / GRTEv4 / 262be5abc585813b1766119db73641d44ba3741e / . / google3 / third_party / grte / v4_src / glibc-2.19 / locale / indigits.h

/* 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; | |

} |