posix/glob_internal.h

   1 /* Shared definition for glob and glob_pattern_p.
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef GLOB_INTERNAL_H
  20 # define GLOB_INTERNAL_H
  21
  22 enum
  23 {
  24   GLOBPAT_NONE      = 0x0,
  25   GLOBPAT_SPECIAL   = 0x1,
  26   GLOBPAT_BACKSLASH = 0x2,
  27   GLOBPAT_BRACKET   = 0x4
  28 };
  29
  30 static inline int
  31 __glob_pattern_type (const char *pattern, int quote)
  32 {
  33   const char *p;
  34   int ret = GLOBPAT_NONE;
  35
  36   for (p = pattern; *p != '\0'; ++p)
  37     switch (*p)
  38       {
  39       case '?':
  40       case '*':
  41         return GLOBPAT_SPECIAL;
  42
  43       case '\\':
  44         if (quote)
  45           {
  46             if (p[1] != '\0')
  47               ++p;
  48             ret |= GLOBPAT_BACKSLASH;
  49           }
  50         break;
  51
  52       case '[':
  53         ret |= GLOBPAT_BRACKET;
  54         break;
  55
  56       case ']':
  57         if (ret & 4)
  58           return GLOBPAT_SPECIAL;
  59         break;
  60       }
  61
  62   return ret;
  63 }
  64
  65 #endif /* GLOB_INTERNAL_H  */