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105 lines
2.7 KiB
105 lines
2.7 KiB
/*
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* Copyright (c) 2003, 2004 Michael Pyne <michael.pyne@kdemail.net>
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*
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* This software is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This software 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
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* License along with this library; see the file COPYING.
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* If not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <tqstring.h>
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#include <tqcstring.h>
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#include <tqiodevice.h>
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#include "bytetape.h"
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#include "bint.h"
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// A bencoded int is (approximately) as follows:
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// i(\d)+e
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BInt::BInt (TQByteArray &dict, int start)
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: m_value (0), m_valid(false)
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{
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ByteTape tape (dict, start);
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init (tape);
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}
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BInt::BInt (ByteTape &tape)
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: m_value(0), m_valid(false)
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{
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init(tape);
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}
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void BInt::init (ByteTape &tape)
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{
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if (*tape != 'i')
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return;
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tape ++; // Move to start of digits
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TQByteArray &dict (tape.data());
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if (dict.find('e', tape.pos()) == -1)
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return;
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// Copy the part from the start to the e. The values in-between
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// should be digits, perhaps preceded by a negative sign.
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int length = dict.find('e', tape.pos()) - tape.pos();
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char *ptr = dict.data(); // Get start of buffer
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ptr += tape.pos(); // Advance to current position in tape
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// Allocate temporary data buffer
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TQByteArray buffer(length + 1);
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tqmemmove (buffer.data(), ptr, length);
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buffer[length] = 0; // Null-terminate
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TQString numberString (buffer);
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bool a_isValid; // We want to make sure the string is a valid number
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m_value = numberString.toLongLong(&a_isValid);
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tape += length; // Move to 'e'
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tape ++; // Move to next char
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m_valid = a_isValid; // Now we're good, if it was a number
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}
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BInt::~BInt()
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{
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/* Nothing yet */
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}
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bool BInt::writeToDevice (TQIODevice &device)
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{
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if (!m_valid)
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return false;
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/* Write out i234e, and such */
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TQString str = TQString("i%1e").
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arg (m_value);
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TQ_LONG written = 0, result = 0;
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written = device.writeBlock (str.latin1(), str.length());
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while ((uint) written < str.length())
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{
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if (written < 0 || result < 0)
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return false;
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result = device.writeBlock(str.latin1() + written,
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str.length() - written);
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written += result;
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}
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return true;
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}
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// vim: set et ts=4 sw=4:
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