lib/source-file.cc

   1 /*
   2   source-file.cc -- implement
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
   7   & Han-Wen Nienhuys <hanwen@stack.nl>
   8 */
   9
  10
  11 #include <assert.h>
  12 #include <strstream.h>
  13
  14 #include "string.hh"
  15 #include "proto.hh"
  16 #include "plist.hh"
  17 #include "warn.hh"
  18 #include "windhoos-suck-suck-suck-thank-you-cygnus.hh"
  19 #include "source-file.hh"
  20 #include "file-storage.hh"
  21
  22 Source_file::Source_file( String filename_str )
  23 {
  24     name_str_ = filename_str;
  25     istream_p_ = 0;
  26     storage_p_ = new Simple_file_storage(filename_str);
  27 }
  28
  29 istream*
  30 Source_file::istream_l()
  31 {
  32     if ( !name_str_.length_i())
  33         return &cin;
  34
  35     if ( !istream_p_ )
  36       {
  37         if ( length_i() ) // can-t this be done without such a hack?
  38             istream_p_ = new istrstream( ch_C(), length_i() );
  39         else
  40           {
  41             istream_p_ = new istrstream( "", 0 );
  42             istream_p_->set(ios::eofbit);
  43           }
  44       }
  45     return istream_p_;
  46 }
  47
  48 String
  49 Source_file::file_line_no_str(char const *ch_C )const
  50 {
  51     return name_str() + ": "
  52         + String( line_i( ch_C ) );
  53 }
  54
  55 String
  56 Source_file::name_str()const
  57 {
  58     return name_str_;
  59 }
  60 Source_file::~Source_file()
  61 {
  62     delete istream_p_;
  63     istream_p_ = 0;
  64     delete storage_p_;
  65 }
  66 String
  67 Source_file::error_str( char const* pos_ch_C )const
  68 {
  69     char const* data_ch_C = ch_C();
  70     char const * eof_C_ = data_ch_C + length_i();
  71     if ( !in_b( pos_ch_C ) )
  72         return "(position unknown)";
  73
  74
  75     if ( pos_ch_C == eof_C_)
  76         pos_ch_C --;
  77     char const* begin_ch_C = pos_ch_C;
  78     while ( begin_ch_C > data_ch_C )
  79         if ( *--begin_ch_C == '\n' )
  80           {
  81             begin_ch_C++;
  82             break;
  83           }
  84
  85     char const* end_ch_C = pos_ch_C;
  86     while ( end_ch_C < eof_C_ )
  87         if ( *end_ch_C++ == '\n' )
  88           {
  89           end_ch_C--;
  90           break;
  91           }
  92
  93         //    String( char const* p, int length ) is missing!?
  94     String line_str( (Byte const*)begin_ch_C, end_ch_C - begin_ch_C );
  95
  96     int error_col_i = 0;
  97     char const* scan_ch_C = begin_ch_C;
  98     while ( scan_ch_C < pos_ch_C )
  99         if ( *scan_ch_C++ == '\t' )
 100             error_col_i = ( error_col_i / 8 + 1 ) * 8;
 101         else
 102             error_col_i++;
 103
 104     String str = line_str.left_str( pos_ch_C - begin_ch_C )
 105         + String( '\n' )
 106         + String( ' ', error_col_i )
 107         + line_str.mid_str( pos_ch_C - begin_ch_C, INT_MAX ); // String::mid should take 0 arg..
 108     return str;
 109 }
 110
 111 bool
 112 Source_file::in_b( char const* pos_ch_C )const
 113 {
 114     return ( pos_ch_C && ( pos_ch_C >= ch_C() ) && ( pos_ch_C <= ch_C() + length_i() ) );
 115 }
 116
 117
 118 int
 119 Source_file::line_i( char const* pos_ch_C )const
 120 {
 121     if ( !in_b( pos_ch_C ) )
 122         return 0;
 123
 124     int i = 1;
 125     char const* scan_ch_C = ch_C();
 126     while ( scan_ch_C < pos_ch_C )
 127         if ( *scan_ch_C++ == '\n' )
 128                 i++;
 129     return i;
 130 }
 131
 132 int
 133 Source_file::length_i()const
 134 {
 135     return storage_p_->length_i();
 136 }
 137
 138 char const *
 139 Source_file::ch_C()const
 140 {
 141     return storage_p_->ch_C();
 142 }