flower/file-path.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5   Jan Nieuwenhuizen <janneke@gnu.org>
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "file-path.hh"
  22
  23 #include <cstdio>
  24 #include <cerrno>
  25
  26 #include "config.hh"
  27 #if HAVE_SYS_STAT_H
  28 #include <sys/stat.h>
  29 #endif
  30
  31 #ifdef __CYGWIN__
  32 #include <sys/cygwin.h>
  33 #endif
  34
  35 #include "file-name.hh"
  36 #include "warn.hh"
  37
  38 #ifndef PATHSEP
  39 #define PATHSEP ':'
  40 #endif
  41
  42 vector<string>
  43 File_path::directories () const
  44 {
  45   return dirs_;
  46 }
  47
  48 #include <algorithm>
  49 void
  50 File_path::parse_path (string p)
  51 {
  52   concat (dirs_, string_split (p, PATHSEP));
  53 }
  54
  55 bool
  56 is_file (string file_name)
  57 {
  58 #if !STAT_MACROS_BROKEN
  59   struct stat sbuf;
  60   if (stat (file_name.c_str (), &sbuf) != 0)
  61     return false;
  62
  63   return !S_ISDIR (sbuf.st_mode);
  64 #endif
  65
  66   if (FILE *f = fopen (file_name.c_str (), "r"))
  67     {
  68       fclose (f);
  69       return true;
  70     }
  71
  72   return false;
  73 }
  74
  75 bool
  76 is_dir (string file_name)
  77 {
  78   /*
  79     canonicalize; in particular, trailing slashes should disappear.
  80    */
  81   file_name = File_name (file_name).to_string ();
  82
  83 #if !STAT_MACROS_BROKEN
  84   struct stat sbuf;
  85   if (stat (file_name.c_str (), &sbuf) != 0)
  86     return false;
  87
  88   return S_ISDIR (sbuf.st_mode);
  89 #endif
  90
  91   if (FILE *f = fopen (file_name.c_str (), "r"))
  92     {
  93       fclose (f);
  94       return true;
  95     }
  96   return false;
  97 }
  98
  99 /** Find a file.
 100
 101 Check absolute file name, search in the current dir (DUH! FIXME!),
 102 in the construction-arg (what's that?), and in any other appended
 103 directory, in this order.
 104
 105 @return
 106 The file name if found, or empty string if not found. */
 107
 108 string
 109 File_path::find (string name) const
 110 {
 111   if (!name.length () || (name == "-"))
 112     return name;
 113
 114 #ifdef __MINGW32__
 115   if (name.find ('\\') != NPOS)
 116     programming_error ("file name not normalized: " + name);
 117 #endif /* __MINGW32__ */
 118
 119   /* Handle absolute file name.  */
 120   File_name file_name (name);
 121   if (file_name.dir_[0] == DIRSEP && is_file (file_name.to_string ()))
 122     return file_name.to_string ();
 123
 124   for (vsize i = 0; i < dirs_.size (); i++)
 125     {
 126       File_name file_name (name);
 127       File_name dir = (string) dirs_[i];
 128       file_name.root_ = dir.root_;
 129       dir.root_ = "";
 130       if (file_name.dir_.empty ())
 131         file_name.dir_ = dir.to_string ();
 132       else if (!dir.to_string ().empty ())
 133         file_name.dir_ = dir.to_string ()
 134           + ::to_string (DIRSEP) + file_name.dir_;
 135       if (is_file (file_name.to_string ()))
 136         return file_name.to_string ();
 137     }
 138   return "";
 139 }
 140
 141 /*
 142   Try to find
 143
 144   file.EXT,
 145
 146   where EXT is from EXTENSIONS.
 147 */
 148 string
 149 File_path::find (string name, char const *extensions[])
 150 {
 151   if (name.empty () || name == "-")
 152     return name;
 153
 154   File_name file_name (name);
 155   string orig_ext = file_name.ext_;
 156   for (int i = 0; extensions[i]; i++)
 157     {
 158       file_name.ext_ = orig_ext;
 159       if (*extensions[i] && !file_name.ext_.empty ())
 160         file_name.ext_ += ".";
 161       file_name.ext_ += extensions[i];
 162       string found = find (file_name.to_string ());
 163       if (!found.empty ())
 164         return found;
 165     }
 166
 167   return "";
 168 }
 169
 170 /** Append a directory, return false if failed.  */
 171 bool
 172 File_path::try_append (string s)
 173 {
 174   if (s == "")
 175     s = ".";
 176   if (is_dir (s))
 177     {
 178       append (s);
 179       return true;
 180     }
 181   return false;
 182 }
 183
 184 string
 185 File_path::to_string () const
 186 {
 187   string s;
 188   for (vsize i = 0; i < dirs_.size (); i++)
 189     {
 190       s = s + dirs_[i];
 191       if (i < dirs_.size () - 1)
 192         s += ::to_string (PATHSEP);
 193     }
 194   return s;
 195 }
 196
 197 void
 198 File_path::append (string str)
 199 {
 200   dirs_.push_back (str);
 201 }
 202
 203 void
 204 File_path::prepend (string str)
 205 {
 206   dirs_.insert (dirs_.begin (), str);
 207 }