flower/file-path.cc

   1 /*
   2    path.cc - manipulation of paths and filenames.
   3 */
   4
   5 #include <stdio.h>
   6
   7 #include "config.h"
   8 #include "file-path.hh"
   9 #include "flower-debug.hh"
  10
  11 #ifndef DIRSEP
  12 #define DIRSEP '/'
  13 #endif
  14
  15 #ifndef PATHSEP
  16 #define PATHSEP ':'
  17 #endif
  18
  19 /**
  20    @param path the original full filename
  21    @return 4 components of the path. They can be empty
  22 */
  23 void
  24 split_path (String path,
  25             String &drive, String &dirs, String &filebase, String &extension)
  26 {
  27   // peel off components, one by one.
  28   int di = path.index_i (':');
  29   if (di >= 0)
  30     {
  31       drive = path.left_str (di + 1);
  32       path = path.right_str (path.length_i () - di -1);
  33     }
  34   else
  35     drive = "";
  36
  37   di = path.index_last_i (DIRSEP);
  38   if (di >=0)
  39     {
  40       dirs = path.left_str (di + 1);
  41       path = path.right_str (path.length_i ()-di -1);
  42     }
  43   else
  44     dirs = "";
  45
  46   di = path.index_last_i ('.');
  47   if (di >= 0)
  48     {
  49       filebase = path.left_str (di);
  50       extension =path.right_str (path.length_i ()-di);
  51     }
  52   else
  53     {
  54       extension = "";
  55       filebase = path;
  56     }
  57 }
  58
  59 void
  60 File_path::parse_path (String p)
  61 {
  62   int l;
  63
  64   while ( (l = p.length_i ()) )
  65     {
  66       int i = p.index_i(PATHSEP);
  67       if (i <0)
  68         i = l;
  69       add (p.left_str(i));
  70       p = p.right_str (l- i - 1);
  71     }
  72 }
  73
  74
  75
  76
  77 /** Find a file.
  78   It will search in the current dir, in the construction-arg, and
  79   in any other added path, in this order.
  80
  81   @return
  82   The full path if found, or empty string if not found
  83   */
  84 String
  85 File_path::find (String nm) const
  86 {
  87   DEBUG_OUT << "looking for" << nm << ": ";
  88   if (!nm.length_i() || (nm == "-") )
  89     return nm;
  90   for (int i=0; i < size(); i++)
  91     {
  92       String path  = elem(i);
  93       String sep = to_str (DIRSEP);
  94       String right(path.right_str (1));
  95       if (path.length_i () && right != sep)
  96         path += to_str (DIRSEP);
  97
  98       path += nm;
  99
 100       DEBUG_OUT << path << "? ";
 101       FILE *f = fopen (path.ch_C(), "r"); // ugh!
 102       if (f)
 103         {
 104           DEBUG_OUT << "found\n";
 105           fclose (f);
 106           return path;
 107         }
 108     }
 109   DEBUG_OUT << '\n';
 110   return "";
 111 }
 112
 113 void
 114 File_path::add (String s)
 115 {
 116    push (s);
 117 }
 118
 119 String
 120 File_path::str () const
 121 {
 122   String s;
 123   for (int i=0; i< size (); i++)
 124     {
 125       s = s + elem (i);
 126       if (i < size () -1 )
 127         s += ":";
 128     }
 129   return s;
 130 }