flower/file-name.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-name.hh"
  22
  23 #include <cstdio>
  24 #include <cerrno>
  25 #include <unistd.h>
  26 #include <limits.h>
  27
  28 using namespace std;
  29
  30 #include "config.hh"
  31
  32 #if HAVE_SYS_STAT_H
  33 #include <sys/stat.h>
  34 #endif
  35
  36 #ifdef __CYGWIN__
  37 #include <sys/cygwin.h>
  38 #endif
  39
  40 #ifndef ROOTSEP
  41 #define ROOTSEP ':'
  42 #endif
  43
  44 #ifndef DIRSEP
  45 #define DIRSEP '/'
  46 #endif
  47
  48 #ifndef EXTSEP
  49 #define EXTSEP '.'
  50 #endif
  51
  52 #ifdef __CYGWIN__
  53 static string
  54 dos_to_posix (string file_name)
  55 {
  56   char buf[PATH_MAX] = "";
  57   char s[PATH_MAX] = {0};
  58   file_name.copy (s, PATH_MAX - 1);
  59   /* ugh: char const* argument gets modified.  */
  60   int fail = cygwin_conv_to_posix_path (s, buf);
  61   if (!fail)
  62     return buf;
  63   return file_name;
  64 }
  65 #endif /* __CYGWIN__ */
  66
  67 /** Use slash as directory separator.  On Windows, they can pretty
  68     much be exchanged.  */
  69 #if 0
  70 static /* avoid warning */
  71 #endif
  72 string
  73 slashify (string file_name)
  74 {
  75   replace_all (&file_name, '\\', '/');
  76   replace_all (&file_name, string ("//"), "/");
  77   return file_name;
  78 }
  79
  80 string
  81 dir_name (string const file_name)
  82 {
  83   string s = file_name;
  84   s = slashify (s);
  85   ssize n = s.length ();
  86   if (n && s[n - 1] == '/')
  87     s[n - 1] = 0;
  88   if (s.rfind ('/') != NPOS)
  89     s = s.substr (0, s.rfind ('/'));
  90   else
  91     s = "";
  92
  93   return s;
  94 }
  95
  96 string
  97 get_working_directory ()
  98 {
  99   char cwd[PATH_MAX];
 100   getcwd (cwd, PATH_MAX);
 101
 102   return string (cwd);
 103 }
 104
 105 /* Join components to full file_name. */
 106 string
 107 File_name::dir_part () const
 108 {
 109   string s;
 110   if (!root_.empty ())
 111     s = root_ + ::to_string (ROOTSEP);
 112
 113   if (!dir_.empty ())
 114     {
 115       s += dir_;
 116     }
 117
 118   return s;
 119 }
 120
 121
 122 string
 123 File_name::file_part () const
 124 {
 125   string s;
 126   s = base_;
 127   if (!ext_.empty ())
 128     s += ::to_string (EXTSEP) + ext_;
 129   return s;
 130 }
 131
 132 string
 133 File_name::to_string () const
 134 {
 135   string d = dir_part ();
 136   string f = file_part ();
 137
 138   if (!f.empty ()
 139       && !dir_.empty())
 140     {
 141       d += ::to_string (DIRSEP);
 142     }
 143
 144   return d + f;
 145 }
 146
 147 File_name::File_name (string file_name)
 148 {
 149 #ifdef __CYGWIN__
 150   /* All system functions would work, even if we do not convert to
 151      posix file_name, but we would think that \foe\bar\baz.ly is in
 152      the cwd.  */
 153   file_name = dos_to_posix (file_name);
 154 #endif
 155 #ifdef __MINGW32__
 156   file_name = slashify (file_name);
 157 #endif
 158
 159   ssize i = file_name.find (ROOTSEP);
 160   if (i != NPOS)
 161     {
 162       root_ = file_name.substr (0, i);
 163       file_name = file_name.substr (i + 1);
 164     }
 165
 166   i = file_name.rfind (DIRSEP);
 167   if (i != NPOS)
 168     {
 169       dir_ = file_name.substr (0, i);
 170       file_name = file_name.substr (i + 1);
 171     }
 172
 173   i = file_name.rfind ('.');
 174   if (i != NPOS)
 175     {
 176       base_ = file_name.substr (0, i);
 177       ext_ = file_name.substr (i + 1);
 178     }
 179   else
 180     base_ = file_name;
 181 }
 182
 183 bool
 184 File_name::is_absolute () const
 185 {
 186   /*
 187     Hmm. Is c:foo absolute?
 188    */
 189   return (dir_.length () && dir_[0] == DIRSEP) || root_.length ();
 190 }
 191
 192
 193
 194 File_name
 195 File_name::canonicalized () const
 196 {
 197   File_name c = *this;
 198
 199   replace_all (&c.dir_, string ("//"), string ("/"));
 200
 201   vector<string> components =  string_split (c.dir_, '/');
 202   vector<string> new_components;
 203
 204   for (vsize i = 0; i < components.size (); i++)
 205     {
 206       if (components[i] == "..")
 207         new_components.pop_back ();
 208       else
 209         new_components.push_back (components[i]);
 210     }
 211
 212   c.dir_ = string_join (new_components,  "/");
 213   return c;
 214 }