pc-tools/ldc2/src/data_block.cpp

   1 #include <stdlib.h>
   2 #include <string.h>
   3
   4 #include "data_block.hh"
   5 #include "data_block_0.hh"
   6
   7 #include <stdio.h>
   8
   9 using namespace std;
  10
  11 /*!
  12  *\brief Specialisation constructor.
  13  */
  14 data_block::data_block(tape_block& org)
  15   :tape_block(org)
  16 {}
  17
  18 /*!
  19  *\brief Determine block type.
  20  *\return the block type extracted from the block's data.
  21  */
  22 int data_block::get_type(){
  23      return (word_data[0]&0xf000)>>12;
  24 }
  25
  26 /*!
  27  *\brief Get the block's size in 16 bit words.
  28  *\return The block's 16-bit data buffer's size including
  29  *         header and checksum.
  30  */
  31 int data_block::get_word_size(){
  32   return word_size;
  33 }
  34
  35 /*!
  36  *\brief Describe the block.
  37  *\return A vector of text lines describing this block.
  38  */
  39 vector<string> data_block::get_description(){
  40   vector<string> result;
  41   string r_string="*****      "+get_typestring()+"Untyped data block, this \
  42  is an illegal condition!";
  43   result.insert(result.end(),r_string);
  44   return result;
  45 }
  46
  47 /*!
  48  *\brief Determine if the block marks the end of an object
  49  *\retval true The block marks the end of an object.
  50  *\retval false The block does not mark the end of an object.
  51  */
  52 bool data_block::get_obj_end(){
  53   return false;
  54 }
  55
  56 /*!
  57  *\brief Extract 6 byte symbol name from word memory.
  58  *
  59  *\param  firstbyte the first byte of the desired symbol name
  60  *\return a string containing the symbol name.
  61  *        Trailing spaces are included.
  62  *\note The word_data is handled system-intependently big endian!
  63  */
  64 string data_block::extract_label(int firstbyte){
  65   string result="";  // Start with empty string
  66
  67   // We don't accept negative arguments!
  68   if (firstbyte<0) return result;
  69
  70   // We also don't want segmentation faults!
  71   if (word_size<(firstbyte/2+1)) return result;
  72
  73   // Here we pick out the characters.
  74   for (int posi=firstbyte;posi<firstbyte+6;posi++)
  75     result+=(word_data[posi/2]>>(8*(1-posi%2)))&0x7f;
  76   return result;
  77 }
  78