3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * parts Copyright 1985, 1990, 1993 Free Software Foundation, Inc.
8 * \author Ivan Schreter
9 * \author Dirk Niggemann
10 * \author Asger Alstrup
11 * \author Lars Gullik Bjønnes
12 * \author Jean-Marc Lasgouttes
13 * \author Angus Leeming
17 * Full author contact details are available in file CREDITS.
19 * General path-mangling functions
24 #include "support/convert.h"
25 #include "support/environment.h"
26 #include "support/filetools.h"
27 #include "support/fs_extras.h"
28 #include "support/lstrings.h"
29 #include "support/lyxlib.h"
30 #include "support/os.h"
31 #include "support/Package.h"
32 #include "support/Path.h"
33 #include "support/Systemcall.h"
35 // FIXME Interface violation
39 #include <boost/assert.hpp>
40 #include <boost/filesystem/operations.hpp>
41 #include <boost/regex.hpp>
58 using std::ostringstream;
62 namespace fs = boost::filesystem;
67 bool isLyXFilename(string const & filename)
69 return suffixIs(ascii_lowercase(filename), ".lyx");
73 bool isSGMLFilename(string const & filename)
75 return suffixIs(ascii_lowercase(filename), ".sgml");
79 bool isValidLaTeXFilename(string const & filename)
81 string const invalid_chars("#$%{}()[]\"^");
82 return filename.find_first_of(invalid_chars) == string::npos;
86 string const latex_path(string const & original_path,
87 latex_path_extension extension,
90 // On cygwin, we may need windows or posix style paths.
91 string path = os::latex_path(original_path);
92 path = subst(path, "~", "\\string~");
93 if (path.find(' ') != string::npos) {
94 // We can't use '"' because " is sometimes active (e.g. if
95 // babel is loaded with the "german" option)
96 if (extension == EXCLUDE_EXTENSION) {
97 // ChangeExtension calls os::internal_path internally
98 // so don't use it to remove the extension.
99 string const ext = getExtension(path);
100 string const base = ext.empty() ?
102 path.substr(0, path.length() - ext.length() - 1);
103 // ChangeExtension calls os::internal_path internally
104 // so don't use it to re-add the extension.
105 path = "\\string\"" + base + "\\string\"." + ext;
107 path = "\\string\"" + path + "\\string\"";
111 return dots == ESCAPE_DOTS ? subst(path, ".", "\\lyxdot ") : path;
115 // Substitutes spaces with underscores in filename (and path)
116 string const makeLatexName(string const & file)
118 string name = onlyFilename(file);
119 string const path = onlyPath(file);
121 // ok so we scan through the string twice, but who cares.
122 string const keep = "abcdefghijklmnopqrstuvwxyz"
123 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
124 "@!'()*+,-./0123456789:;<=>?[]`|";
126 string::size_type pos = 0;
127 while ((pos = name.find_first_not_of(keep, pos)) != string::npos)
130 return addName(path, name);
134 string const quoteName(string const & name, quote_style style)
138 // This does not work for filenames containing " (windows)
139 // or ' (all other OSes). This can't be changed easily, since
140 // we would need to adapt the command line parser in
141 // Forkedcall::generateChild. Therefore we don't pass user
142 // filenames to child processes if possible. We store them in
143 // a python script instead, where we don't have these
145 return (os::shell() == os::UNIX) ?
149 return "\"" + subst(subst(name, "\\", "\\\\"), "\"", "\\\"")
152 // shut up stupid compiler
158 // Uses a string of paths separated by ";"s to find a file to open.
159 // Can't cope with pathnames with a ';' in them. Returns full path to file.
160 // If path entry begins with $$LyX/, use system_lyxdir
161 // If path entry begins with $$User/, use user_lyxdir
162 // Example: "$$User/doc;$$LyX/doc"
163 FileName const fileOpenSearch(string const & path, string const & name,
168 bool notfound = true;
169 string tmppath = split(path, path_element, ';');
171 while (notfound && !path_element.empty()) {
172 path_element = os::internal_path(path_element);
173 if (!suffixIs(path_element, '/'))
175 path_element = subst(path_element, "$$LyX",
176 package().system_support().absFilename());
177 path_element = subst(path_element, "$$User",
178 package().user_support().absFilename());
180 real_file = fileSearch(path_element, name, ext);
182 if (real_file.empty()) {
184 tmppath = split(tmppath, path_element, ';');
185 } while (!tmppath.empty() && path_element.empty());
195 /// Returns a vector of all files in directory dir having extension ext.
196 vector<FileName> const dirList(FileName const & dir, string const & ext)
198 // EXCEPTIONS FIXME. Rewrite needed when we turn on exceptions. (Lgb)
199 vector<FileName> dirlist;
201 if (!(dir.exists() && dir.isDirectory())) {
203 << "Directory \"" << dir
204 << "\" does not exist to DirList." << endl;
209 if (!ext.empty() && ext[0] != '.')
213 string const encoded_dir = dir.toFilesystemEncoding();
214 fs::directory_iterator dit(encoded_dir);
215 fs::directory_iterator end;
216 for (; dit != end; ++dit) {
217 string const & fil = dit->leaf();
218 if (suffixIs(fil, extension))
219 dirlist.push_back(FileName::fromFilesystemEncoding(
220 encoded_dir + '/' + fil));
226 // Returns the real name of file name in directory path, with optional
228 FileName const fileSearch(string const & path, string const & name,
229 string const & ext, search_mode mode)
231 // if `name' is an absolute path, we ignore the setting of `path'
232 // Expand Environmentvariables in 'name'
233 string const tmpname = replaceEnvironmentPath(name);
234 FileName fullname(makeAbsPath(tmpname, path));
235 // search first without extension, then with it.
236 if (fullname.isReadable())
240 return mode == allow_unreadable ? fullname : FileName();
241 // Only add the extension if it is not already the extension of
243 if (getExtension(fullname.absFilename()) != ext)
244 fullname = FileName(addExtension(fullname.absFilename(), ext));
245 if (fullname.isReadable() || mode == allow_unreadable)
251 // Search the file name.ext in the subdirectory dir of
253 // 2) build_lyxdir (if not empty)
255 FileName const libFileSearch(string const & dir, string const & name,
258 FileName fullname = fileSearch(addPath(package().user_support().absFilename(), dir),
260 if (!fullname.empty())
263 if (!package().build_support().empty())
264 fullname = fileSearch(addPath(package().build_support().absFilename(), dir),
266 if (!fullname.empty())
269 return fileSearch(addPath(package().system_support().absFilename(), dir), name, ext);
273 FileName const i18nLibFileSearch(string const & dir, string const & name,
276 /* The highest priority value is the `LANGUAGE' environment
277 variable. But we don't use the value if the currently
278 selected locale is the C locale. This is a GNU extension.
280 Otherwise, w use a trick to guess what gettext has done:
281 each po file is able to tell us its name. (JMarc)
284 string lang = to_ascii(_("[[Replace with the code of your language]]"));
285 string const language = getEnv("LANGUAGE");
286 if (!lang.empty() && !language.empty())
290 lang = split(lang, l, ':');
293 // First try with the full name
294 tmp = libFileSearch(addPath(dir, l), name, ext);
298 // Then the name without country code
299 string const shortl = token(l, '_', 0);
301 tmp = libFileSearch(addPath(dir, shortl), name, ext);
307 // For compatibility, to be removed later (JMarc)
308 tmp = libFileSearch(dir, token(l, '_', 0) + '_' + name,
311 lyxerr << "i18nLibFileSearch: File `" << tmp
312 << "' has been found by the old method" <<endl;
316 lang = split(lang, l, ':');
319 return libFileSearch(dir, name, ext);
323 string const libScriptSearch(string const & command_in, quote_style style)
325 static string const token_scriptpath = "$$s/";
327 string command = command_in;
328 // Find the starting position of "$$s/"
329 string::size_type const pos1 = command.find(token_scriptpath);
330 if (pos1 == string::npos)
332 // Find the end of the "$$s/some_subdir/some_script" word within
333 // command. Assumes that the script name does not contain spaces.
334 string::size_type const start_script = pos1 + 4;
335 string::size_type const pos2 = command.find(' ', start_script);
336 string::size_type const size_script = pos2 == string::npos?
337 (command.size() - start_script) : pos2 - start_script;
339 // Does this script file exist?
340 string const script =
341 libFileSearch(".", command.substr(start_script, size_script)).absFilename();
343 if (script.empty()) {
344 // Replace "$$s/" with ""
345 command.erase(pos1, 4);
347 // Replace "$$s/foo/some_script" with "<path to>/some_script".
348 string::size_type const size_replace = size_script + 4;
349 command.replace(pos1, size_replace, quoteName(script, style));
356 static FileName createTmpDir(FileName const & tempdir, string const & mask)
359 << "createTmpDir: tempdir=`" << tempdir << "'\n"
360 << "createTmpDir: mask=`" << mask << '\'' << endl;
362 FileName const tmpfl(tempName(tempdir, mask));
363 // lyx::tempName actually creates a file to make sure that it
364 // stays unique. So we have to delete it before we can create
365 // a dir with the same name. Note also that we are not thread
366 // safe because of the gap between unlink and mkdir. (Lgb)
369 if (tmpfl.empty() || mkdir(tmpfl, 0700)) {
370 lyxerr << "LyX could not create the temporary directory '"
371 << tmpfl << "'" << endl;
378 string const createBufferTmpDir()
381 // We are in our own directory. Why bother to mangle name?
382 // In fact I wrote this code to circumvent a problematic behaviour
383 // (bug?) of EMX mkstemp().
385 package().temp_dir().absFilename() + "/lyx_tmpbuf" +
386 convert<string>(count++);
388 if (mkdir(FileName(tmpfl), 0777)) {
389 lyxerr << "LyX could not create the temporary directory '"
390 << tmpfl << "'" << endl;
397 FileName const createLyXTmpDir(FileName const & deflt)
399 if (!deflt.empty() && deflt.absFilename() != "/tmp") {
400 if (mkdir(deflt, 0777)) {
401 if (deflt.isDirWritable()) {
402 // deflt could not be created because it
403 // did exist already, so let's create our own
405 return createTmpDir(deflt, "lyx_tmpdir");
407 // some other error occured.
408 return createTmpDir(FileName("/tmp"), "lyx_tmpdir");
413 return createTmpDir(FileName("/tmp"), "lyx_tmpdir");
418 // Strip filename from path name
419 string const onlyPath(string const & filename)
421 // If empty filename, return empty
422 if (filename.empty())
425 // Find last / or start of filename
426 string::size_type j = filename.rfind('/');
427 return j == string::npos ? "./" : filename.substr(0, j + 1);
431 // Convert relative path into absolute path based on a basepath.
432 // If relpath is absolute, just use that.
433 // If basepath is empty, use CWD as base.
434 FileName const makeAbsPath(string const & relPath, string const & basePath)
436 // checks for already absolute path
437 if (os::is_absolute_path(relPath))
438 return FileName(relPath);
440 // Copies given paths
441 string tempRel = os::internal_path(relPath);
442 // Since TempRel is NOT absolute, we can safely replace "//" with "/"
443 tempRel = subst(tempRel, "//", "/");
447 if (os::is_absolute_path(basePath))
450 tempBase = addPath(getcwd().absFilename(), basePath);
452 // Handle /./ at the end of the path
453 while (suffixIs(tempBase, "/./"))
454 tempBase.erase(tempBase.length() - 2);
456 // processes relative path
457 string rTemp = tempRel;
460 while (!rTemp.empty()) {
462 rTemp = split(rTemp, temp, '/');
464 if (temp == ".") continue;
466 // Remove one level of TempBase
467 string::difference_type i = tempBase.length() - 2;
470 while (i > 0 && tempBase[i] != '/')
473 tempBase.erase(i, string::npos);
476 } else if (temp.empty() && !rTemp.empty()) {
477 tempBase = os::current_root() + rTemp;
480 // Add this piece to TempBase
481 if (!suffixIs(tempBase, '/'))
487 // returns absolute path
488 return FileName(os::internal_path(tempBase));
492 // Correctly append filename to the pathname.
493 // If pathname is '.', then don't use pathname.
494 // Chops any path of filename.
495 string const addName(string const & path, string const & fname)
497 string const basename = onlyFilename(fname);
500 if (path != "." && path != "./" && !path.empty()) {
501 buf = os::internal_path(path);
502 if (!suffixIs(path, '/'))
506 return buf + basename;
510 // Strips path from filename
511 string const onlyFilename(string const & fname)
516 string::size_type j = fname.rfind('/');
517 if (j == string::npos) // no '/' in fname
521 return fname.substr(j + 1);
525 /// Returns true is path is absolute
526 bool absolutePath(string const & path)
528 return os::is_absolute_path(path);
532 // Create absolute path. If impossible, don't do anything
533 // Supports ./ and ~/. Later we can add support for ~logname/. (Asger)
534 string const expandPath(string const & path)
536 // checks for already absolute path
537 string rTemp = replaceEnvironmentPath(path);
538 if (os::is_absolute_path(rTemp))
542 string const copy = rTemp;
545 rTemp = split(rTemp, temp, '/');
548 return getcwd().absFilename() + '/' + rTemp;
551 return package().home_dir().absFilename() + '/' + rTemp;
554 return makeAbsPath(copy).absFilename();
556 // Don't know how to handle this
561 // Normalize a path. Constracts path/../path
562 // Can't handle "../../" or "/../" (Asger)
563 // Also converts paths like /foo//bar ==> /foo/bar
564 string const normalizePath(string const & path)
566 // Normalize paths like /foo//bar ==> /foo/bar
567 static boost::regex regex("/{2,}");
568 string const tmppath = boost::regex_merge(path, regex, "/");
570 fs::path const npath = fs::path(tmppath, fs::no_check).normalize();
572 if (!npath.is_complete())
573 return "./" + npath.string() + '/';
575 return npath.string() + '/';
579 // Search the string for ${VAR} and $VAR and replace VAR using getenv.
580 string const replaceEnvironmentPath(string const & path)
582 // ${VAR} is defined as
583 // $\{[A-Za-z_][A-Za-z_0-9]*\}
584 static string const envvar_br = "[$]\\{([A-Za-z_][A-Za-z_0-9]*)\\}";
586 // $VAR is defined as:
587 // $\{[A-Za-z_][A-Za-z_0-9]*\}
588 static string const envvar = "[$]([A-Za-z_][A-Za-z_0-9]*)";
590 static boost::regex envvar_br_re("(.*)" + envvar_br + "(.*)");
591 static boost::regex envvar_re("(.*)" + envvar + "(.*)");
594 string result = path;
596 regex_match(result, what, envvar_br_re);
597 if (!what[0].matched) {
598 regex_match(result, what, envvar_re);
599 if (!what[0].matched)
602 result = what.str(1) + getEnv(what.str(2)) + what.str(3);
608 // Make relative path out of two absolute paths
609 docstring const makeRelPath(docstring const & abspath, docstring const & basepath)
610 // Makes relative path out of absolute path. If it is deeper than basepath,
611 // it's easy. If basepath and abspath share something (they are all deeper
612 // than some directory), it'll be rendered using ..'s. If they are completely
613 // different, then the absolute path will be used as relative path.
615 docstring::size_type const abslen = abspath.length();
616 docstring::size_type const baselen = basepath.length();
618 docstring::size_type i = os::common_path(abspath, basepath);
621 // actually no match - cannot make it relative
625 // Count how many dirs there are in basepath above match
626 // and append as many '..''s into relpath
628 docstring::size_type j = i;
629 while (j < baselen) {
630 if (basepath[j] == '/') {
631 if (j + 1 == baselen)
638 // Append relative stuff from common directory to abspath
639 if (abspath[i] == '/')
641 for (; i < abslen; ++i)
644 if (suffixIs(buf, '/'))
645 buf.erase(buf.length() - 1);
646 // Substitute empty with .
653 // Append sub-directory(ies) to a path in an intelligent way
654 string const addPath(string const & path, string const & path_2)
657 string const path2 = os::internal_path(path_2);
659 if (!path.empty() && path != "." && path != "./") {
660 buf = os::internal_path(path);
661 if (path[path.length() - 1] != '/')
665 if (!path2.empty()) {
666 string::size_type const p2start = path2.find_first_not_of('/');
667 string::size_type const p2end = path2.find_last_not_of('/');
668 string const tmp = path2.substr(p2start, p2end - p2start + 1);
675 string const changeExtension(string const & oldname, string const & extension)
677 string::size_type const last_slash = oldname.rfind('/');
678 string::size_type last_dot = oldname.rfind('.');
679 if (last_dot < last_slash && last_slash != string::npos)
680 last_dot = string::npos;
683 // Make sure the extension starts with a dot
684 if (!extension.empty() && extension[0] != '.')
685 ext= '.' + extension;
689 return os::internal_path(oldname.substr(0, last_dot) + ext);
693 string const removeExtension(string const & name)
695 return changeExtension(name, string());
699 string const addExtension(string const & name, string const & extension)
701 if (!extension.empty() && extension[0] != '.')
702 return name + '.' + extension;
703 return name + extension;
707 /// Return the extension of the file (not including the .)
708 string const getExtension(string const & name)
710 string::size_type const last_slash = name.rfind('/');
711 string::size_type const last_dot = name.rfind('.');
712 if (last_dot != string::npos &&
713 (last_slash == string::npos || last_dot > last_slash))
714 return name.substr(last_dot + 1,
715 name.length() - (last_dot + 1));
721 string const unzippedFileName(string const & zipped_file)
723 string const ext = getExtension(zipped_file);
724 if (ext == "gz" || ext == "z" || ext == "Z")
725 return changeExtension(zipped_file, string());
726 return "unzipped_" + zipped_file;
730 FileName const unzipFile(FileName const & zipped_file, string const & unzipped_file)
732 FileName const tempfile = FileName(unzipped_file.empty() ?
733 unzippedFileName(zipped_file.toFilesystemEncoding()) :
736 string const command = "gunzip -c " +
737 zipped_file.toFilesystemEncoding() + " > " +
738 tempfile.toFilesystemEncoding();
740 one.startscript(Systemcall::Wait, command);
741 // test that command was executed successfully (anon)
742 // yes, please do. (Lgb)
747 docstring const makeDisplayPath(string const & path, unsigned int threshold)
751 // If file is from LyXDir, display it as if it were relative.
752 string const system = package().system_support().absFilename();
753 if (prefixIs(str, system) && str != system)
754 return from_utf8("[" + str.erase(0, system.length()) + "]");
756 // replace /home/blah with ~/
757 string const home = package().home_dir().absFilename();
758 if (!home.empty() && prefixIs(str, home))
759 str = subst(str, home, "~");
761 if (str.length() <= threshold)
762 return from_utf8(os::external_path(str));
764 string const prefix = ".../";
767 while (str.length() > threshold)
768 str = split(str, temp, '/');
770 // Did we shorten everything away?
772 // Yes, filename itself is too long.
773 // Pick the start and the end of the filename.
774 str = onlyFilename(path);
775 string const head = str.substr(0, threshold / 2 - 3);
777 string::size_type len = str.length();
779 str.substr(len - threshold / 2 - 2, len - 1);
780 str = head + "..." + tail;
783 return from_utf8(os::external_path(prefix + str));
787 bool readLink(FileName const & file, FileName & link)
790 char linkbuffer[512];
791 // Should be PATH_MAX but that needs autconf support
792 string const encoded = file.toFilesystemEncoding();
793 int const nRead = ::readlink(encoded.c_str(),
794 linkbuffer, sizeof(linkbuffer) - 1);
797 linkbuffer[nRead] = '\0'; // terminator
798 link = makeAbsPath(linkbuffer, onlyPath(file.absFilename()));
806 cmd_ret const runCommand(string const & cmd)
808 // FIXME: replace all calls to RunCommand with ForkedCall
809 // (if the output is not needed) or the code in ISpell.cpp
810 // (if the output is needed).
812 // One question is if we should use popen or
813 // create our own popen based on fork, exec, pipe
814 // of course the best would be to have a
815 // pstream (process stream), with the
816 // variants ipstream, opstream
818 #if defined (HAVE_POPEN)
819 FILE * inf = ::popen(cmd.c_str(), os::popen_read_mode());
820 #elif defined (HAVE__POPEN)
821 FILE * inf = ::_popen(cmd.c_str(), os::popen_read_mode());
823 #error No popen() function.
826 // (Claus Hentschel) Check if popen was succesful ;-)
828 lyxerr << "RunCommand:: could not start child process" << endl;
829 return make_pair(-1, string());
835 ret += static_cast<char>(c);
839 #if defined (HAVE_PCLOSE)
840 int const pret = pclose(inf);
841 #elif defined (HAVE__PCLOSE)
842 int const pret = _pclose(inf);
844 #error No pclose() function.
848 perror("RunCommand:: could not terminate child process");
850 return make_pair(pret, ret);
854 FileName const findtexfile(string const & fil, string const & /*format*/)
856 /* There is no problem to extend this function too use other
857 methods to look for files. It could be setup to look
858 in environment paths and also if wanted as a last resort
859 to a recursive find. One of the easier extensions would
860 perhaps be to use the LyX file lookup methods. But! I am
861 going to implement this until I see some demand for it.
865 // If the file can be found directly, we just return a
866 // absolute path version of it.
867 FileName const absfile(makeAbsPath(fil));
868 if (absfile.exists())
871 // No we try to find it using kpsewhich.
872 // It seems from the kpsewhich manual page that it is safe to use
873 // kpsewhich without --format: "When the --format option is not
874 // given, the search path used when looking for a file is inferred
875 // from the name given, by looking for a known extension. If no
876 // known extension is found, the search path for TeX source files
878 // However, we want to take advantage of the format sine almost all
879 // the different formats has environment variables that can be used
880 // to controll which paths to search. f.ex. bib looks in
881 // BIBINPUTS and TEXBIB. Small list follows:
882 // bib - BIBINPUTS, TEXBIB
884 // graphic/figure - TEXPICTS, TEXINPUTS
885 // ist - TEXINDEXSTYLE, INDEXSTYLE
886 // pk - PROGRAMFONTS, PKFONTS, TEXPKS, GLYPHFONTS, TEXFONTS
888 // tfm - TFMFONTS, TEXFONTS
889 // This means that to use kpsewhich in the best possible way we
890 // should help it by setting additional path in the approp. envir.var.
891 string const kpsecmd = "kpsewhich " + fil;
893 cmd_ret const c = runCommand(kpsecmd);
895 LYXERR(Debug::LATEX) << "kpse status = " << c.first << '\n'
896 << "kpse result = `" << rtrim(c.second, "\n\r")
899 return FileName(os::internal_path(rtrim(to_utf8(from_filesystem8bit(c.second)),
906 void removeAutosaveFile(string const & filename)
908 string a = onlyPath(filename);
910 a += onlyFilename(filename);
912 FileName const autosave(a);
913 if (autosave.exists())
918 void readBB_lyxerrMessage(FileName const & file, bool & zipped,
919 string const & message)
921 LYXERR(Debug::GRAPHICS) << "[readBB_from_PSFile] "
922 << message << std::endl;
923 // FIXME: Why is this func deleting a file? (Lgb)
929 string const readBB_from_PSFile(FileName const & file)
931 // in a (e)ps-file it's an entry like %%BoundingBox:23 45 321 345
932 // It seems that every command in the header has an own line,
933 // getline() should work for all files.
934 // On the other hand some plot programs write the bb at the
935 // end of the file. Than we have in the header:
936 // %%BoundingBox: (atend)
937 // In this case we must check the end.
938 bool zipped = file.isZippedFile();
939 FileName const file_ = zipped ? unzipFile(file) : file;
940 string const format = file_.guessFormatFromContents();
942 if (format != "eps" && format != "ps") {
943 readBB_lyxerrMessage(file_, zipped,"no(e)ps-format");
947 static boost::regex bbox_re(
948 "^%%BoundingBox:\\s*([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)");
949 std::ifstream is(file_.toFilesystemEncoding().c_str());
954 if (regex_match(s, what, bbox_re)) {
955 // Our callers expect the tokens in the string
956 // separated by single spaces.
957 // FIXME: change return type from string to something
960 os << what.str(1) << ' ' << what.str(2) << ' '
961 << what.str(3) << ' ' << what.str(4);
962 string const bb = os.str();
963 readBB_lyxerrMessage(file_, zipped, bb);
967 readBB_lyxerrMessage(file_, zipped, "no bb found");
972 int compare_timestamps(FileName const & file1, FileName const & file2)
974 // If the original is newer than the copy, then copy the original
975 // to the new directory.
978 if (file1.exists() && file2.exists()) {
979 double const tmp = difftime(file1.lastModified(), file2.lastModified());
981 cmp = tmp > 0 ? 1 : -1;
983 } else if (file1.exists()) {
985 } else if (file2.exists()) {
992 } //namespace support