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1 | #include <stdlib.h> |
2 | #include <string.h> |
3 | |
4 | #include "data_block.hh" |
5 | #include "data_block_0.hh" |
6 | |
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7 | #include <stdio.h> |
8 | |
9 | using namespace std; |
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10 | |
11 | data_block::data_block(tape_block& idol) |
12 | :tape_block(idol) |
13 | { |
14 | } |
15 | |
16 | data_block::~data_block(){ |
17 | } |
18 | |
19 | int data_block::get_type(){ |
20 | if ((init_state==TBS_OK)&&word_data) |
21 | return (word_data[0]&0xf000)>>12; |
22 | else |
23 | return block_type; |
24 | } |
25 | |
26 | int data_block::get_subtype(){ |
27 | if (get_type()==0) |
28 | return (new data_block_0(*this))->get_subtype(); |
29 | else return 0; |
30 | } |
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31 | |
32 | /*! |
33 | *\brief Get the block's size in 16 bit words. |
34 | *\return The block's 16-bit data buffer's size including header and checksum. |
35 | */ |
36 | int data_block::get_word_size(){ |
37 | return word_size; |
38 | } |
39 | |
40 | /*! |
41 | *\brief Extract 6 byte symbol name from word memory. |
42 | * |
43 | *\param startbyte the first byte of the desired symbol name |
44 | *\return a string containing the symbol name. |
45 | * Trailing spaces are included. |
46 | *\note The word_data is handled system-intependently big endian! |
47 | */ |
48 | string data_block::extract_string(int startbyte){ |
49 | string result=""; // Start with empty string |
50 | |
51 | // We don't accept negative arguments! |
52 | if (startbyte<0) return result; |
53 | |
54 | // We also don't want segmentation faults! |
55 | if (word_size<(startbyte/2+1)) return result; |
56 | |
57 | // Here we pick out the characters. |
58 | for (int posi=startbyte;posi<startbyte+6;posi++) |
59 | result+=(word_data[posi/2]>>(8*(1-posi%2)))&0x7f; |
60 | return result; |
61 | } |