lib/unilbrk/ulc-common.c

   1 /* Line breaking auxiliary functions.
   2    Copyright (C) 2001-2003, 2006-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2001.
   4
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation, either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25
  26 #include <config.h>
  27
  28 /* Specification.  */
  29 #include "unilbrk/ulc-common.h"
  30
  31 #include "c-ctype.h"
  32 #include "c-strcaseeq.h"
  33
  34 int
  35 is_utf8_encoding (const char *encoding)
  36 {
  37   if (STRCASEEQ (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
  38     return 1;
  39   return 0;
  40 }
  41
  42 #if C_CTYPE_ASCII
  43
  44 /* Tests whether a string is entirely ASCII.  Returns 1 if yes.
  45    Returns 0 if the string is in an 8-bit encoding or an ISO-2022 encoding.  */
  46 int
  47 is_all_ascii (const char *s, size_t n)
  48 {
  49   for (; n > 0; s++, n--)
  50     {
  51       unsigned char c = (unsigned char) *s;
  52
  53       if (!(c_isprint (c) || c_isspace (c)))
  54         return 0;
  55     }
  56   return 1;
  57 }
  58
  59 #endif /* C_CTYPE_ASCII */