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Diffstat (limited to 'Build/source/texk/kpathsea/xdirname.c')
-rw-r--r-- | Build/source/texk/kpathsea/xdirname.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/Build/source/texk/kpathsea/xdirname.c b/Build/source/texk/kpathsea/xdirname.c new file mode 100644 index 00000000000..cc6600928ad --- /dev/null +++ b/Build/source/texk/kpathsea/xdirname.c @@ -0,0 +1,108 @@ +/* xdirname.c: return the directory part of a path. + + Copyright 1999, 2008, 2011, 2016, 2017 Karl Berry. + Copyright 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/>. */ + +/* Return directory for NAME. This is "." if NAME contains no directory + separators (should never happen for selfdir), else whatever precedes + the final directory separator, but with multiple separators stripped. + For example, `xdirname ("/foo//bar.baz")' returns "/foo". Always + return a new string. */ + +#include <kpathsea/config.h> +#include <kpathsea/c-pathch.h> + +string +xdirname (const_string name) +{ + string ret; + unsigned limit = 0, loc; +#if defined(WIN32) + string p; +#endif + + /* Ignore a NULL name. */ + if (!name) + return NULL; + + if (NAME_BEGINS_WITH_DEVICE(name)) { + limit = 2; + } else if (IS_UNC_NAME(name)) { + for (limit = 2; name[limit] && !IS_DIR_SEP (name[limit]); limit++) + ; + if (name[limit++] && name[limit] && !IS_DIR_SEP (name[limit])) { + for (; name[limit] && !IS_DIR_SEP (name[limit]); limit++) + ; + limit--; + } else + /* malformed UNC name, backup */ + limit = 0; + } + +#if defined(WIN32) && defined (KPSE_COMPAT_API) + for (loc = strlen (name); loc > limit && + (!IS_DIR_SEP (name[loc-1]) || + (loc > 1 && IS_KANJI(name+loc-2))); loc--) + ; +#else + for (loc = strlen (name); loc > limit && !IS_DIR_SEP (name[loc-1]); loc--) + ; +#endif + + if (loc == limit) { + if (limit == 0) + ret = xstrdup ("."); + else if (limit == 2) { + ret = (string)xmalloc(4); + ret[0] = name[0]; + ret[1] = name[1]; + ret[2] = '.'; + ret[3] = '\0'; + } else { + /* UNC name is "//server/share". */ + ret = xstrdup (name); + } + } else { + /* If have ///a, must return /, so don't strip off everything. */ +#if defined(WIN32) && defined (KPSE_COMPAT_API) + while (loc > limit+1 && IS_DIR_SEP (name[loc-1])) { + if (loc > 1 && IS_KANJI(name+loc-2)) + break; + loc--; + } +#else + while (loc > limit+1 && IS_DIR_SEP (name[loc-1])) { + loc--; + } +#endif + ret = (string)xmalloc(loc+1); + strncpy(ret, name, loc); + ret[loc] = '\0'; + } + +#if defined(WIN32) + for (p = ret; *p; p++) { + if (*p == '\\') + *p = '/'; +#if defined (KPSE_COMPAT_API) + else if (IS_KANJI(p)) + p++; +#endif + } +#endif + + return ret; +} |