diff -r b41d74bacdea -r 6bf57b4f42cd src/bytestream.cpp --- a/src/bytestream.cpp Sun Aug 11 13:38:12 2013 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,243 +0,0 @@ -/* - * ZanDemo: Zandronum demo launcher - * Copyright (C) 2013 Santeri Piippo - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include "bytestream.h" -#include "misc.h" -#include - -union { - uint32 i; - float f; -} g_floatunion; - -Bytestream::Bytestream (ulong len) { - m_data = null; - resize (len); - clear(); -} - -Bytestream::Bytestream (const char* data, ulong len) { - m_data = null; - init (data, len); -} - -void Bytestream::resize (ulong newsize) { - char* olddata = null; - ulong oldsize; - - if (m_data) { - oldsize = m_size; - olddata = new char[oldsize]; - memcpy (olddata, m_data, oldsize); - } - - delete[] m_data; - m_data = new uint8[newsize]; - m_size = newsize; - - if (olddata) - memcpy (m_data, olddata, min (oldsize, newsize)); -} - -void Bytestream::init (const char* data, ulong len) { - resize (len); - memcpy (m_data, data, len); - m_ptr = &m_data[0]; - m_len = len; -} - -size_t Bytestream::len() const { - return m_len; -} - -void Bytestream::clear() { - m_ptr = &m_data[0]; - m_len = 0; -} - -uint8& Bytestream::subscript (ulong idx) { - return m_data[idx]; -} - -const uint8& Bytestream::const_subscript (ulong idx) const { - return m_data[idx]; -} - -void Bytestream::seek (ulong pos) { - m_ptr = m_data + pos; -} - -// ============================================================================= -void Bytestream::rewind() { - m_ptr = m_data; -} - -ulong Bytestream::bytesLeft() const { - return (m_len - (m_ptr - &m_data[0])); -} - -ulong Bytestream::spaceLeft() const { - return (m_size - m_len); -} - -// ============================================================================= -bool Bytestream::readByte (uint8& val) { - if (bytesLeft() < 1) - return false; - - val = *m_ptr++; - return true; -} - -// ============================================================================= -bool Bytestream::readShort (uint16& val) { - if (bytesLeft() < 2) - return false; - - val = 0; - - for (int i = 0; i < 2; ++i) - val |= *m_ptr++ << (i * 8); - - return true; -} - -// ============================================================================= -bool Bytestream::readLong (uint32& val) { - if (bytesLeft() < 4) - return false; - - val = 0; - - for (int i = 0; i < 4; ++i) - val |= *m_ptr++ << (i * 8); - - return true; -} - -// ============================================================================= -bool Bytestream::readFloat (float& val) { - if (!readLong (g_floatunion.i)) - return false; - - val = g_floatunion.f; - return true; -} - -// ============================================================================= -bool Bytestream::readString (str& val) { - if (bytesLeft() < 1) // need at least the null terminator - return false; - - uint8_t c; - - while (readByte (c) && c != '\0') - val += (char) c; - - return true; -} - -// ============================================================================= -void Bytestream::doWrite (uint8_t val) { - *m_ptr++ = val; - m_len++; -} - -void Bytestream::growToFit (ulong bytes) { - if (spaceLeft() < bytes) - resize (m_size + bytes + 128); -} - -bool Bytestream::readBytes (uint8 numbytes, uint8* val) { - while (numbytes--) - if (!readByte (*val++)) - return false; - - return true; -} - -void Bytestream::writeBytes (uint8 numbytes, const uint8* val) { - growToFit (numbytes); - - while (numbytes--) - writeByte (*val++); -} - -// ============================================================================= -void Bytestream::writeByte (uint8 val) { - growToFit (1); - doWrite (val); -} - -// ============================================================================= -void Bytestream::writeShort (uint16 val) { - growToFit (2); - - for (int i = 0; i < 2; ++i) - doWrite ( (val >> (i * 8)) & 0xFF); -} - -// ============================================================================= -void Bytestream::writeLong (uint32 val) { - growToFit (4); - - for (int i = 0; i < 4; ++i) - doWrite ( (val >> (i * 8)) & 0xFF); -} - -// ============================================================================= -void Bytestream::writeFloat (float val) { - g_floatunion.f = val; - writeLong (g_floatunion.i); -} - -// ============================================================================= -void Bytestream::writeString (str val) { - growToFit (val.length() + 1); - - for (qchar c : val) - doWrite (c.toLatin1()); - - doWrite ('\0'); -} - -// ============================================================================= -bool Bytestream::tryMerge (const Bytestream& other) { - if (spaceLeft() < other.len()) - return false; - - for (ulong i = 0; i < other.len(); ++i) - writeByte (other[i]); - - return true; -} - -void Bytestream::merge (const Bytestream& other) { - growToFit (other.len()); - - if (!tryMerge (other)) { - // Shouldn't happen - fprint (stderr, "ByteStream: Not enough space for merge (%1 bytes left, need %2)", - spaceLeft(), other.len()); - abort(); - } -} - -const uint8* Bytestream::data() const { - return m_data; -}