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authorMike Buland <eichlan@xagasoft.com>2011-10-27 04:01:46 +0000
committerMike Buland <eichlan@xagasoft.com>2011-10-27 04:01:46 +0000
commit029b5d159023f4dad607359dbfaa2479e21fe9e5 (patch)
tree99c5ad1d6f4c77ce1a656f63194df442e0fdfded
parentb57332230fb39c38ae1806348dbc4cd6c725d5db (diff)
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Added simple hex encoder/decoder filter.
-rw-r--r--src/hex.cpp69
-rw-r--r--src/hex.h57
2 files changed, 126 insertions, 0 deletions
diff --git a/src/hex.cpp b/src/hex.cpp
new file mode 100644
index 0000000..2a04c6f
--- /dev/null
+++ b/src/hex.cpp
@@ -0,0 +1,69 @@
1/*
2 * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
3 *
4 * This file is part of the libbu++ library and is released under the
5 * terms of the license contained in the file LICENSE.
6 */
7
8#include "bu/hex.h"
9
10Bu::Hex::Hex( Bu::Stream &rNext, bool bUpperCase, int iChunk ) :
11 Bu::Filter( rNext ),
12 iChunk( iChunk ),
13 iPos( 0 ),
14 iIn( 0 ),
15 sChrs(bUpperCase?"0123456789ABCDEF":"0123456789abcdef")
16{
17}
18
19Bu::Hex::~Hex()
20{
21}
22
23void Bu::Hex::start()
24{
25 iPos = iIn = 0;
26}
27
28Bu::size Bu::Hex::stop()
29{
30 return iPos;
31}
32
33Bu::size Bu::Hex::read( void *pBuf, Bu::size iBytes )
34{
35 Bu::size j;
36 uint8_t *puBuf = (uint8_t *)pBuf;
37 for( j = 0; j < iBytes; j++ )
38 {
39 for(; iIn < 2; iIn++ )
40 {
41 if( rNext.read( &cIn[iIn], 1 ) == 0 )
42 return j;
43 if( cIn[iIn] == ' ' || cIn[iIn] == '\t' ||
44 cIn[iIn] == '\n' || cIn[iIn] == '\r' )
45 iIn--;
46 }
47#define chr2nibble( c ) ((c>='0'&&c<='9')?(c-'0'):((c|0x60)-'a'+10))
48 puBuf[j] = ((chr2nibble(cIn[0])<<4)|chr2nibble(cIn[1]));
49 iIn = 0;
50 }
51 return j;
52}
53
54Bu::size Bu::Hex::write( const void *pBuf, Bu::size iBytes )
55{
56 char cOut[2];
57 uint8_t *puBuf = (uint8_t *)pBuf;
58 for( Bu::size j = 0; j < iBytes; j++ )
59 {
60 cOut[0] = sChrs[(puBuf[j]&0xf0)>>4];
61 cOut[1] = sChrs[(puBuf[j]&0x0f)];
62 if( iChunk > 0 && iPos%iChunk == 0 && iPos>0 )
63 rNext.write(" ", 1 );
64 rNext.write( cOut, 2 );
65 iPos++;
66 }
67 return iBytes;
68}
69
diff --git a/src/hex.h b/src/hex.h
new file mode 100644
index 0000000..3595fae
--- /dev/null
+++ b/src/hex.h
@@ -0,0 +1,57 @@
1/*
2 * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
3 *
4 * This file is part of the libbu++ library and is released under the
5 * terms of the license contained in the file LICENSE.
6 */
7
8#ifndef BU_HEX_H
9#define BU_HEX_H
10
11#include "bu/filter.h"
12
13namespace Bu
14{
15 /**
16 * This very simple filter encodes to/decodes from hex encoded string data.
17 * The primary use of this filter is in debugging, use it with
18 * Bu::encodeStr to easily create hex dumps of string data, even other raw
19 * structures.
20 *
21 *@code
22 Bu::println("Hexdump: " + Bu::encodeStr<Bu::Hex>("Test data ;)") );
23 @endcode
24 * Or...
25 *@code
26 complex_struct data;
27 ...
28 Bu::println("Hexdump: " +
29 Bu::encodeStr<Bu::Hex>(
30 Bu::String( &data, sizeof(data) )
31 )
32 );
33 @endcode
34 **/
35 class Hex : public Bu::Filter
36 {
37 public:
38 Hex( Bu::Stream &rNext, bool bUpperCase=false, int iChunk=-1 );
39 virtual ~Hex();
40
41 virtual void start();
42 virtual Bu::size stop();
43
44 virtual Bu::size read( void *pBuf, Bu::size iBytes );
45 virtual Bu::size write( const void *pBuf, Bu::size iBytes );
46 using Bu::Stream::write;
47
48 private:
49 int iChunk;
50 Bu::size iPos;
51 char cIn[2];
52 int iIn;
53 const char *sChrs;
54 };
55};
56
57#endif