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396 lines
11 KiB
396 lines
11 KiB
/*
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* khexedit - Versatile hex editor
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* Copyright (C) 1999 Espen Sand, espensa@online.no
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <string.h>
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#include <tdelocale.h>
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#include "conversion.h"
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CConversion::CConversion( void )
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{
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setMode( cnvDefault );
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}
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CConversion::EMode CConversion::mode( void )
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{
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return( (EMode)mState.mode );
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}
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const SEncodeState &CConversion::state( void )
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{
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return( mState );
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}
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TQString CConversion::names( unsigned int index )
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{
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static const TQString strings[4] =
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{
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i18n("Default encoding", "Default"),
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i18n("EBCDIC"),
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i18n("US-ASCII (7 bit)"),
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i18n("Unknown"),
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};
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return( strings[ index > cnvUsAscii ? 3 : index ] );
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}
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const unsigned char *CConversion::tables( EMode cnvMode )
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{
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/*
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static unsigned char ebcdicToLatin1[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
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0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
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0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
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0x20, 0xA0, 0xE2, 0xE4, 0xE0, 0xE1, 0xE3, 0xE5,
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0xE7, 0xF1, 0xA2, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
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0x26, 0xE9, 0xEA, 0xEB, 0xE8, 0xED, 0xEE, 0xEF,
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0xEC, 0xDF, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E,
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0x2D, 0x2F, 0xC2, 0xC4, 0xC0, 0xC1, 0xC3, 0xC5,
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0xC7, 0xD1, 0xA6, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
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0xF8, 0xC9, 0xCA, 0xCB, 0xC8, 0xCD, 0xCE, 0xCF,
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0xCC, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
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0xD8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0xAB, 0xBB, 0xF0, 0xFD, 0xFE, 0xB1,
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0xB0, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4,
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0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0x5B, 0xDE, 0xAE,
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0xAC, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC,
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0xBD, 0xBE, 0xDD, 0xA8, 0xAF, 0x5D, 0xB4, 0xD7,
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0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0xAD, 0xF4, 0xF6, 0xF2, 0xF3, 0xF5,
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0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
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0x51, 0x52, 0xB9, 0xFB, 0xFC, 0xF9, 0xFA, 0xFF,
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0x5C, 0xF7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5A, 0xB2, 0xD4, 0xD6, 0xD2, 0xD3, 0xD5,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xB3, 0xDB, 0xDC, 0xD9, 0xDA, 0x9F
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};
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*/
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static unsigned char ebcdicToLatin1[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
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0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
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0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
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0x20, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
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0xA7, 0xA8, 0x5B, 0x2E, 0x3C, 0x28, 0x2B, 0x21,
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0x26, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
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0xB0, 0xB1, 0x5D, 0x24, 0x2A, 0x29, 0x3B, 0x5E,
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0x2D, 0x2F, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
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0xB8, 0xB9, 0x7C, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
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0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1,
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0xC2, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
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0xC3, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
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0xCA, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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0x71, 0x72, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0,
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0xD1, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7A, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
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0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
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0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED,
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0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
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0x51, 0x52, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3,
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0x5C, 0x9F, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5A, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
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};
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static unsigned char buf[256];
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if( cnvMode == cnvEbcdic )
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{
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return( ebcdicToLatin1 );
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}
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else if( cnvMode == cnvUsAscii )
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{
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memset( buf, 0, 256 );
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for( unsigned int i=0; i<127; i++ ) { buf[i] = i; }
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return( buf );
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}
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else if( cnvMode == cnvDefault )
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{
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for( unsigned int i=0; i<256; i++ ) { buf[i] = i; }
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return( buf );
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}
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else
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{
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return( 0 );
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}
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}
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void CConversion::setMode( EMode cnvMode )
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{
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const unsigned char *table = tables( cnvMode );
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if( table == 0 )
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{
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cnvMode = cnvDefault;
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table = tables( cnvMode );
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}
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mState.mode = cnvMode;
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mState.name = names( mState.mode );
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memcpy( mData, table, 256 );
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}
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bool CConversion::lossless( EMode cnvMode )
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{
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const unsigned char *table = tables( cnvMode );
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if( table == 0 )
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{
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return( false );
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}
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unsigned char flag[256];
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memset( flag, 0, sizeof( flag ) );
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for( uint i=0; i<256; i++ )
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{
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int index = table[i];
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if( flag[index] != 0 )
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{
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return( false );
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}
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flag[index] += 1;
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}
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return( true );
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}
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#if 0
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void CConversion::setMode( EMode cnvMode )
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{
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/*
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static unsigned char ebcdicToLatin1[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
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0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
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0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
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0x20, 0xA0, 0xE2, 0xE4, 0xE0, 0xE1, 0xE3, 0xE5,
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0xE7, 0xF1, 0xA2, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
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0x26, 0xE9, 0xEA, 0xEB, 0xE8, 0xED, 0xEE, 0xEF,
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0xEC, 0xDF, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E,
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0x2D, 0x2F, 0xC2, 0xC4, 0xC0, 0xC1, 0xC3, 0xC5,
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0xC7, 0xD1, 0xA6, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
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0xF8, 0xC9, 0xCA, 0xCB, 0xC8, 0xCD, 0xCE, 0xCF,
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0xCC, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
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0xD8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0xAB, 0xBB, 0xF0, 0xFD, 0xFE, 0xB1,
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0xB0, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4,
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0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0x5B, 0xDE, 0xAE,
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0xAC, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC,
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0xBD, 0xBE, 0xDD, 0xA8, 0xAF, 0x5D, 0xB4, 0xD7,
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0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0xAD, 0xF4, 0xF6, 0xF2, 0xF3, 0xF5,
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0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
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0x51, 0x52, 0xB9, 0xFB, 0xFC, 0xF9, 0xFA, 0xFF,
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0x5C, 0xF7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5A, 0xB2, 0xD4, 0xD6, 0xD2, 0xD3, 0xD5,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xB3, 0xDB, 0xDC, 0xD9, 0xDA, 0x9F
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};
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*/
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static unsigned char ebcdicToLatin1[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
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0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
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0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
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0x20, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
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0xA7, 0xA8, 0x5B, 0x2E, 0x3C, 0x28, 0x2B, 0x21,
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0x26, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
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0xB0, 0xB1, 0x5D, 0x24, 0x2A, 0x29, 0x3B, 0x5E,
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0x2D, 0x2F, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
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0xB8, 0xB9, 0x7C, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
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0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1,
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0xC2, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
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0xC3, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
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0xCA, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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0x71, 0x72, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0,
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0xD1, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7A, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
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0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
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0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED,
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0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
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0x51, 0x52, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3,
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0x5C, 0x9F, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5A, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
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};
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if( cnvMode == cnvEbcdic )
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{
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memcpy( mData, ebcdicToLatin1, 256 );
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}
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else if( cnvMode == cnvUsAscii )
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{
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memset( mData, 0, 256 );
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for( unsigned int i=0; i<127; i++ ) { mData[i] = i; }
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}
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else
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{
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for( unsigned int i=0; i<256; i++ ) { mData[i] = i; }
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cnvMode = cnvDefault;
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}
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mState.mode = cnvMode;
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mState.name = names( mState.mode );
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}
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#endif
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int CConversion::convert( TQByteArray &buf, EMode newMode, CProgress &p )
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{
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if( newMode == mode() )
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{
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p.finish();
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return( Err_Success );
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}
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if( buf.isEmpty() )
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{
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p.finish();
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setMode( newMode );
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return( Err_Success );
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}
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//
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// Make backup
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//
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const TQByteArray tmp( buf.copy() );
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if( tmp.isEmpty() )
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{
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p.finish();
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return( Err_NoMemory );
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}
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unsigned char rev[256];
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uint i, sum;
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sum = 0;
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const float total = buf.size() * 2.0;
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//
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// Prepare reverse buffer.
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//
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for( i=0; i < 256; i++ )
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{
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rev[(unsigned char)mData[i]] = i;
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}
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//
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// Normalize
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//
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for( i=0; i<buf.size(); i++, sum++ )
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{
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buf[i] = rev[ (unsigned char)buf[i] ];
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|
|
|
//
|
|
// The expired() function introduces too much overhead in this case
|
|
// so it is only executed every 100'th character
|
|
//
|
|
if( i % 100 == 0 && p.expired() == true )
|
|
{
|
|
const int errCode = p.step( (float)sum/ total );
|
|
if( errCode == Err_Stop )
|
|
{
|
|
buf = tmp;
|
|
p.finish();
|
|
return( Err_OperationAborted );
|
|
}
|
|
}
|
|
}
|
|
|
|
EMode origMode = mode();
|
|
setMode( newMode );
|
|
|
|
//
|
|
// Apply new encoding.
|
|
//
|
|
for( uint i=0; i<buf.size(); i++, sum++ )
|
|
{
|
|
buf[i] = mData[ (unsigned char)buf[i] ];
|
|
|
|
//
|
|
// The expired() function introduces too much overhead in this case
|
|
// so it is only executed every 100'th character
|
|
//
|
|
if( i % 100 == 0 && p.expired() == true )
|
|
{
|
|
const int errCode = p.step( (float)sum/ total );
|
|
if( errCode == Err_Stop )
|
|
{
|
|
buf = tmp;
|
|
setMode( origMode );
|
|
p.finish();
|
|
return( Err_OperationAborted );
|
|
}
|
|
}
|
|
}
|
|
|
|
p.finish();
|
|
return( Err_Success );
|
|
}
|
|
|
|
|