이진 파일을 읽어서 16진수로 보여주는 HexView 소스 with Octave

 

Octave 언어 소스:

% Filename: testHexView_02.m
%
% Execute: octave -qf testHexView_02.m [filename]
%
% Date: 2013. 8. 18.

function printUsage()
    printf("Usage: octave -qf testHexView_02.m [filename]\n");
endfunction

function y = getFileSize(fd)
    n = ftell(fd);
    fseek(fd, 0, SEEK_END);
    x = ftell(fd);
    fseek(fd, n, SEEK_SET);
    y = x;
endfunction

function y = toHex(n)
    s = "";
    x1 = bitshift(bitand(n, 0xF0), -4);
    x2 = bitand(n, 0xF);
    if (x1 < 10)
        s = strcat(s, char(toascii('0') + x1));
    else
        s = strcat(s, char(toascii('A') + (x1 - 10)));
    endif
    % printf("s = %s\n", s);
    if (x2 < 10)
        s = strcat(s, char(toascii('0') + x2));
    else
        s = strcat(s, char(toascii('A') + (x2 - 10)));
    endif
    % printf("s = %s\n", s);
    y = s;
endfunction

function y = toHex8(n)
    s = "";
    % printf("s = %s\n", s);
    x1 = bitshift(bitand(n, 0xF0000000), -28);
    x2 = bitshift(bitand(n, 0xF000000), -24);
    x3 = bitshift(bitand(n, 0xF00000), -20);
    x4 = bitshift(bitand(n, 0xF0000), -16);
    x5 = bitshift(bitand(n, 0xF000), -12);
    x6 = bitshift(bitand(n, 0xF00), -8);
    x7 = bitshift(bitand(n, 0xF0), -4);
    x8 = bitand(n, 0xF);
    if (x1 < 10)
        s = strcat(s, char(toascii('0') + x1));
    else
        s = strcat(s, char(toascii('A') + (x1 - 10)));
    endif
    if (x2 < 10)
        s = strcat(s, char(toascii('0') + x2));
    else
        s = strcat(s, char(toascii('A') + (x2 - 10)));
    endif
    if (x3 < 10)
        s = strcat(s, char(toascii('0') + x3));
    else
        s = strcat(s, char(toascii('A') + (x3 - 10)));
    endif
    if (x4 < 10)
        s = strcat(s, char(toascii('0') + x4));
    else
        s = strcat(s, char(toascii('A') + (x4 - 10)));
    endif
    %% s = sprintf("%s -", s);
    if (x5 < 10)
        % s = strcat(s, char(toascii('0') + x5));
        s = sprintf("%s %c", s, char(toascii('0') + x5));
    else
        % s = strcat(s, char(toascii('A') + (x5 - 10)));
        s = sprintf("%s %c", s, char(toascii('A') + (x5 - 10)));
    endif
    if (x6 < 10)
        s = strcat(s, char(toascii('0') + x6));
    else
        s = strcat(s, char(toascii('A') + (x6 - 10)));
    endif
    if (x7 < 10)
        s = strcat(s, char(toascii('0') + x7));
    else
        s = strcat(s, char(toascii('A') + (x7 - 10)));
    endif
    if (x8 < 10)
        s = strcat(s, char(toascii('0') + x8));
    else
        s = strcat(s, char(toascii('A') + (x8 - 10)));
    endif
    y = s;
endfunction

 

arg_list = argv ();
if nargin < 1
    printUsage();
    quit;
endif

fname = arg_list{1};

if exist(fname, "dir")
    printf("\"%s\" is a directory.\n", fname);
    quit;
endif

if ! exist(fname, "file")
    printf("The file \"%s\" does not exist.\n", fname);
    quit;
endif

f = fopen(fname, "rb");

fsize = getFileSize(f);

printf("The size of the file \"%s\" is %d.\n", fname, fsize);
printf("\n");

fseek(f, 0, SEEK_SET);
n = 0;
dum = "";
while n < fsize
    if mod(n, 16) == 0
        printf("%s: ", toHex8(n));
    endif
    [val, count] = fread (f, 1);
    if mod(n, 16) == 8
        printf("-%s", toHex(val));
    else
        printf(" %s", toHex(val));
    endif
    if toascii(val) < toascii(' ') || toascii(val) > 0x7F
        dum = sprintf("%s%c", dum, '.');
    else
        dum = sprintf("%s%c", dum, toascii(val));
    endif
    if mod(n, 16) == 15
        printf("  |%s|\n", dum);
        dum = "";
    endif
    n = n + 1;
endwhile

if mod(n, 16) > 0
    for i = 1 : 16 - mod(n, 16)
        printf("   ");
    endfor
    printf("  |%s", dum);
    for i = 1 : 16 - mod(n, 16)
        printf(" ");
    endfor
    printf("|\n");
    dum = "";
endif

fclose(f);

printf("\nRead %d bytes.\n", n);

 

실행 예 1> octave -qf testHexView_02.m .\temp_1.bin
The size of the file ".\temp_1.bin" is 12.

0000 0000:  48 65 6C 6C 6F 20 74 68-65 72 65 0A              |Hello there.    |

Read 12 bytes.

실행 예 2> octave -qf testHexView_02.m .\myFile.ser
The size of the file ".\myFile.ser" is 130.

0000 0000:  AC ED 00 05 73 72 00 06-50 65 72 73 6F 6E 07 31  |,m..sr..Person.1|
0000 0010:  46 DB A5 1D 44 AB 02 00-03 49 00 03 61 67 65 4C  |F[%.D+...I..ageL|
0000 0020:  00 09 66 69 72 73 74 4E-61 6D 65 74 00 12 4C 6A  |..firstNamet..Lj|
0000 0030:  61 76 61 2F 6C 61 6E 67-2F 53 74 72 69 6E 67 3B  |ava/lang/String;|
0000 0040:  4C 00 08 6C 61 73 74 4E-61 6D 65 71 00 7E 00 01  |L..lastNameq.~..|
0000 0050:  78 70 00 00 00 13 74 00-05 4A 61 6D 65 73 74 00  |xp....t..Jamest.|
0000 0060:  04 52 79 61 6E 73 71 00-7E 00 00 00 00 00 1E 74  |.Ryansq.~......t|
0000 0070:  00 07 4F 62 69 2D 77 61-6E 74 00 06 4B 65 6E 6F  |..Obi-want..Keno|
0000 0080:  62 69                                            |bi              |

Read 130 bytes.