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         if ( length_i() ) // can-t this be done without such a hack?
  37             istream_p_ = new istrstream( ch_C(), length_i() );
  38         else {
  39             istream_p_ = new istrstream( "", 0 );
  40             istream_p_->set(ios::eofbit);
  41         }
  42     }
  43     return istream_p_;
  44 }
  45
  46 String
  47 Source_file::file_line_no_str(char const *ch_C )const
  48 {
  49     return name_str() + ": "
  50         + String( line_i( ch_C ) );
  51 }
  52
  53 String
  54 Source_file::name_str()const
  55 {
  56     return name_str_;
  57 }
  58 Source_file::~Source_file()
  59 {
  60     delete istream_p_;
  61     istream_p_ = 0;
  62     delete storage_p_;
  63 }
  64 String
  65 Source_file::error_str( char const* pos_ch_C )const
  66 {
  67     char const* data_ch_C = ch_C();
  68     char const * eof_C_ = data_ch_C + length_i();
  69     if ( !in_b( pos_ch_C ) )
  70         return "(position unknown)";
  71
  72
  73     if ( pos_ch_C == eof_C_)
  74         pos_ch_C --;
  75     char const* begin_ch_C = pos_ch_C;
  76     while ( begin_ch_C > data_ch_C )
  77         if ( *--begin_ch_C == '\n' ) {
  78             begin_ch_C++;
  79             break;
  80         }
  81
  82     char const* end_ch_C = pos_ch_C;
  83     while ( end_ch_C < eof_C_ )
  84         if ( *end_ch_C++ == '\n' ) {
  85           end_ch_C--;
  86           break;
  87         }
  88
  89         //    String( char const* p, int length ) is missing!?
  90     String line_str( (Byte const*)begin_ch_C, end_ch_C - begin_ch_C );
  91
  92     int error_col_i = 0;
  93     char const* scan_ch_C = begin_ch_C;
  94     while ( scan_ch_C < pos_ch_C )
  95         if ( *scan_ch_C++ == '\t' )
  96             error_col_i = ( error_col_i / 8 + 1 ) * 8;
  97         else
  98             error_col_i++;
  99
 100     String str = line_str.left_str( pos_ch_C - begin_ch_C )
 101         + String( '\n' )
 102         + String( ' ', error_col_i )
 103         + line_str.mid_str( pos_ch_C - begin_ch_C, INT_MAX ); // String::mid should take 0 arg..
 104     return str;
 105 }
 106
 107 bool
 108 Source_file::in_b( char const* pos_ch_C )const
 109 {
 110     return ( pos_ch_C && ( pos_ch_C >= ch_C() ) && ( pos_ch_C <= ch_C() + length_i() ) );
 111 }
 112
 113
 114 int
 115 Source_file::line_i( char const* pos_ch_C )const
 116 {
 117     if ( !in_b( pos_ch_C ) )
 118         return 0;
 119
 120     int i = 1;
 121     char const* scan_ch_C = ch_C();
 122     while ( scan_ch_C < pos_ch_C )
 123         if ( *scan_ch_C++ == '\n' )
 124                 i++;
 125     return i;
 126 }
 127
 128 int
 129 Source_file::length_i()const
 130 {
 131     return storage_p_->length_i();
 132 }
 133
 134 char const *
 135 Source_file::ch_C()const
 136 {
 137     return storage_p_->ch_C();
 138 }