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+/* c-pathch.h: define the characters which separate components of
+ filenames and environment variable paths.
+
+ Copyright 1992, 1993, 1995, 1997, 2008, 2018 Karl Berry.
+ Copyright 1997, 1999, 2001, 2005 Olaf Weber.
+
+ This 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.
+
+ This 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 this library; if not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef C_PATHCH_H
+#define C_PATHCH_H
+
+#include <kpathsea/c-ctype.h>
+
+/* What separates filename components? */
+#ifndef DIR_SEP
+# if defined(VMS)
+# define DIR_SEP ':'
+# define DIR_SEP_STRING ":"
+# elif defined(DOSISH) /* not VMS */
+/* Either \'s or 's work. Wayne Sullivan's web2pc prefers /, so we'll
+ go with that. */
+# define DIR_SEP '/'
+# define DIR_SEP_STRING "/"
+# define IS_DEVICE_SEP(ch) ((ch) == ':')
+# define NAME_BEGINS_WITH_DEVICE(name) (*(name) && IS_DEVICE_SEP((name)[1]))
+/* On DOS, it's good to allow both \ and / between directories. */
+# define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\')
+# ifdef WIN32
+/* On win32, UNC names are authorized */
+# define IS_UNC_NAME(name) (strlen(name)>=3 && IS_DIR_SEP(*name) \
+ && IS_DIR_SEP(*(name+1)) && isalnum(*(name+2)))
+/* Used after converting '\\' into '/' */
+# define IS_DIR_SEP_CH(ch) ((ch) == '/')
+# endif
+# elif defined(AMIGA) /* not DOSISH */
+# define DIR_SEP '/'
+# define DIR_SEP_STRING "/"
+# define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == ':')
+# define IS_DEVICE_SEP(ch) ((ch) == ':')
+# elif defined(VMCMS) /* not AMIGA */
+# define DIR_SEP ' '
+# define DIR_SEP_STRING " "
+# else /* not VMCMS */
+# define DIR_SEP '/'
+# define DIR_SEP_STRING "/"
+# endif /* not VMCMS */
+#endif /* not DIR_SEP */
+
+#ifndef IS_DIR_SEP
+#define IS_DIR_SEP(ch) ((ch) == DIR_SEP)
+#endif
+#ifndef IS_DIR_SEP_CH
+#define IS_DIR_SEP_CH(ch) IS_DIR_SEP(ch)
+#endif
+#ifndef IS_DEVICE_SEP /* No `devices' on, e.g., Unix. */
+#define IS_DEVICE_SEP(ch) 0
+#endif
+#ifndef NAME_BEGINS_WITH_DEVICE
+#define NAME_BEGINS_WITH_DEVICE(name) 0
+#endif
+#ifndef IS_UNC_NAME /* Unc names are in practice found on Win32 only. */
+#define IS_UNC_NAME(name) 0
+#endif
+
+/* What separates elements in environment variable path lists? */
+#ifndef ENV_SEP
+#ifdef VMS
+# define ENV_SEP ','
+# define ENV_SEP_STRING ","
+#elif defined (DOSISH)
+# define ENV_SEP ';'
+# define ENV_SEP_STRING ";"
+#elif defined (AMIGA)
+# define ENV_SEP ';'
+# define ENV_SEP_STRING ";"
+#elif defined (VMCMS)
+# define ENV_SEP ' '
+# define ENV_SEP_STRING " "
+#else
+# define ENV_SEP ':'
+# define ENV_SEP_STRING ":"
+/* Because paths in Kpathsea cnf files allow use of either ; or : separators
+ regardless of the current system, on Unix we sometimes need to check
+ for either . */
+# define IS_KPSE_SEP(ch) ((ch) == ':' || (ch) == ';')
+#endif
+#endif /* not ENV_SEP */
+
+#ifndef IS_ENV_SEP
+#define IS_ENV_SEP(ch) ((ch) == ENV_SEP)
+#endif
+
+#ifndef IS_KPSE_SEP
+/* But for Windows, we do not want to consider : as a path separator,
+ ever, because it is the drive separator (as in c:\tex). So just
+ check for the regular separator (;). */
+#define IS_KPSE_SEP(ch) (IS_ENV_SEP (ch))
+#endif
+
+#endif /* not C_PATHCH_H */