lily/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--2003 Jan Nieuwenhuizen
   7 */
   8
   9
  10 #include <limits.h>             // INT_MAX
  11 #include <assert.h>
  12
  13 #include "flower-proto.hh"
  14 #include "string.hh"
  15 #include "source-file.hh"
  16 #include "binary-source-file.hh"
  17 #include "string-convert.hh"
  18
  19 Binary_source_file::Binary_source_file (String& filename_string)
  20   : Source_file (filename_string)
  21 {
  22 }
  23
  24 Binary_source_file::~Binary_source_file ()
  25 {
  26 }
  27
  28 String
  29 Binary_source_file::error_string (char const* pos_str0) const
  30 {
  31   assert (this);
  32   if (!in_b (pos_str0))
  33     return "";
  34
  35   char const* begin_str0 = pos_str0 - 8 >? to_str0 ();
  36   char const* end_str0 = pos_str0 + 7 <? to_str0 () + length ();
  37
  38   String pre_string ((Byte const*)begin_str0, pos_str0 - begin_str0);
  39   pre_string = String_convert::bin2hex (pre_string);
  40   for (int i = 2; i < pre_string.length (); i += 3)
  41     pre_string = pre_string.left_string (i) + " " + pre_string.cut_string (i, INT_MAX);
  42   String post_string ((Byte const*)pos_str0, end_str0 - pos_str0);
  43   post_string = String_convert::bin2hex (post_string);
  44   for (int i = 2; i < post_string.length (); i += 3)
  45     post_string = post_string.left_string (i) + " " + post_string.cut_string (i, INT_MAX);
  46
  47   String str = pre_string
  48     + to_string ('\n')
  49     + to_string (' ', pre_string.length () + 1)
  50     + post_string;
  51   return str;
  52 }
  53
  54 int
  55 Binary_source_file::get_line (char const* pos_str0) const
  56 {
  57   if (!in_b (pos_str0))
  58     return 0;
  59
  60   return pos_str0 - to_str0 ();
  61 }
  62
  63 U8
  64 Binary_source_file::get_U8 ()
  65 {
  66   return * (U8*)forward_str0 (1);
  67 }
  68
  69
  70 U16
  71 Binary_source_file::get_U16 ()
  72 {
  73   U16 b;
  74
  75   b = get_U8 () << 8;
  76   b |= get_U8 ();
  77
  78   return b;
  79 }
  80
  81 /*
  82   naming is wrong. This is a UNIX-endian-32 (as opposed to xinu or ixun)
  83  */
  84
  85 U32
  86 Binary_source_file::get_U32 ()
  87 {
  88   U32 b;
  89
  90   b = get_U8 () << 24;
  91   b |= get_U8 () << 16;
  92   b |= get_U8 () << 8;
  93   b |= get_U8 ();
  94
  95   return b;
  96 }
  97
  98