lib/binary-source-file.cc

   1 /*
   2   binary-source-file.cc -- implement Binary_source_file
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c)  1997--1999 Jan Nieuwenhuizen
   7 */
   8
   9
  10 #include <limits.h>             // INT_MAX
  11 #include <assert.h>
  12
  13 #include "proto.hh"
  14 #include "plist.hh"
  15 #include "string.hh"
  16 #include "source-file.hh"
  17 #include "binary-source-file.hh"
  18 #include "string-convert.hh"
  19
  20 Binary_source_file::Binary_source_file (String& filename_str)
  21         : Source_file (filename_str)
  22 {
  23 }
  24
  25 Binary_source_file::~Binary_source_file ()
  26 {
  27 }
  28
  29 String
  30 Binary_source_file::error_str (char const* pos_ch_C) const
  31 {
  32     assert (this);
  33     if (!in_b (pos_ch_C))
  34         return "";
  35
  36     char const* begin_ch_C = pos_ch_C - 8 >? ch_C ();
  37     char const* end_ch_C = pos_ch_C + 7 <? ch_C () + length_i ();
  38
  39     String pre_str ((Byte const*)begin_ch_C, pos_ch_C - begin_ch_C);
  40     pre_str = String_convert::bin2hex_str (pre_str);
  41     for (int i = 2; i < pre_str.length_i (); i += 3)
  42         pre_str = pre_str.left_str (i) + " " + pre_str.cut_str (i, INT_MAX);
  43     String post_str ((Byte const*)pos_ch_C, end_ch_C - pos_ch_C);
  44     post_str = String_convert::bin2hex_str (post_str);
  45     for (int i = 2; i < post_str.length_i (); i += 3)
  46         post_str = post_str.left_str (i) + " " + post_str.cut_str (i, INT_MAX);
  47
  48     String str = pre_str
  49         + to_str ('\n')
  50         + to_str (' ', pre_str.length_i () + 1)
  51         + post_str;
  52     return str;
  53 }
  54
  55 int
  56 Binary_source_file::line_i (char const* pos_ch_C) const
  57 {
  58     if (!in_b (pos_ch_C))
  59         return 0;
  60
  61     return pos_ch_C - ch_C ();
  62 }
  63
  64 U8
  65 Binary_source_file::get_U8 ()
  66 {
  67   return *(U8*)forward_ch_C (1);
  68 }
  69
  70
  71 U16
  72 Binary_source_file::get_U16 ()
  73 {
  74   U16 b;
  75
  76   b = get_U8 () << 8;
  77   b |= get_U8 ();
  78
  79   return b;
  80 }
  81
  82
  83 U32
  84 Binary_source_file::get_U32()
  85 {
  86   U32 b;
  87
  88   b = get_U8 () << 24;
  89   b |= get_U8 () << 16;
  90   b |= get_U8 () << 8;
  91   b |= get_U8 ();
  92
  93   return b;
  94 }
  95
  96