flower/path.cc

   1 /*
   2    path.cc - manipulation of paths and filenames.
   3 */
   4 #include <stdio.h>
   5 #include "path.hh"
   6 #include "flower-debug.hh"
   7
   8 #ifndef DIRSEP
   9 #define DIRSEP '/'
  10 #endif
  11
  12 #ifndef PATHSEP
  13 #define PATHSEP ':'
  14 #endif
  15
  16 /**
  17    @param path the original full filename
  18    @return 4 components of the path. They can be empty
  19 */
  20 void
  21 split_path (String path,
  22             String &drive, String &dirs, String &filebase, String &extension)
  23 {
  24   // peel off components, one by one.
  25   int di = path.index_i (':');
  26   if (di >= 0)
  27     {
  28       drive = path.left_str (di + 1);
  29       path = path.right_str (path.length_i () - di -1);
  30     }
  31   else
  32     drive = "";
  33
  34   di = path.index_last_i (DIRSEP);
  35   if (di >=0)
  36     {
  37       dirs = path.left_str (di + 1);
  38       path = path.right_str (path.length_i ()-di -1);
  39     }
  40   else
  41     dirs = "";
  42
  43   di = path.index_last_i ('.');
  44   if (di >= 0)
  45     {
  46       filebase = path.left_str (di);
  47       extension =path.right_str (path.length_i ()-di);
  48     }
  49   else
  50     {
  51       extension = "";
  52       filebase = path;
  53     }
  54 }
  55
  56 void
  57 File_path::parse_path (String p)
  58 {
  59   int l;
  60
  61   while ( (l = p.length_i ()) )
  62     {
  63       int i = p.index_i(PATHSEP);
  64       if (i <0)
  65         i = l;
  66       add (p.left_str(i));
  67       p = p.right_str (l- i - 1);
  68     }
  69 }
  70
  71
  72
  73
  74 /** find a file.
  75   It will search in the current dir, in the construction-arg, and
  76   in any other added path, in this order.
  77   */
  78 String
  79 File_path::find (String nm) const
  80 {
  81   fdebug << _("looking for ") << nm << ": ";
  82   if (!nm.length_i() || (nm == "-") )
  83     return nm;
  84   for (int i=0; i < size(); i++)
  85     {
  86       String path  = elem(i);
  87       String sep (DIRSEP);
  88       String right(path.right_str (1));
  89       if (path.length_i () && right != sep)
  90         path += DIRSEP;
  91
  92       path += nm;
  93
  94       fdebug << path << "? ";
  95       FILE *f = fopen (path.ch_C(), "r"); // ugh!
  96       if (f)
  97         {
  98           fdebug << _("found\n");
  99           fclose (f);
 100           return path;
 101         }
 102     }
 103   fdebug << "\n";
 104   return "";
 105 }
 106
 107 void
 108 File_path::add (String s)
 109 {
 110    push (s);
 111 }