71 lines
1.3 KiB
C++
71 lines
1.3 KiB
C++
#include "data.h"
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#include <cstring>
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/* PycData */
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int PycData::get16()
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{
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/* Ensure endianness */
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int val = ( ((getByte() & 0xFF) )
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| ((getByte() & 0xFF) << 8)
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);
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/* Extend sign */
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return (val | -(val & 0x8000));
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}
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int PycData::get32()
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{
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/* Ensure endianness */
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return (int)( ((getByte() & 0xFF) )
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| ((getByte() & 0xFF) << 8)
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| ((getByte() & 0xFF) << 16)
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| ((getByte() & 0xFF) << 24)
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);
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}
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/* PycFile */
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PycFile::PycFile(const char* filename)
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{
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m_stream = fopen(filename, "rb");
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}
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bool PycFile::atEof() const
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{
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int ch = fgetc(m_stream);
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ungetc(ch, m_stream);
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return (ch == EOF);
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}
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int PycFile::getByte()
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{
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int ch = fgetc(m_stream);
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if (ch == EOF)
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ungetc(ch, m_stream);
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return ch;
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}
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int PycFile::getBuffer(int bytes, void* buffer)
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{
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return (int)fread(buffer, 1, bytes, m_stream);
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}
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/* PycBuffer */
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int PycBuffer::getByte()
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{
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if (atEof())
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return EOF;
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int ch = (int)(*(m_buffer + m_pos));
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++m_pos;
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return ch & 0xFF; // Make sure it's just a byte!
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}
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int PycBuffer::getBuffer(int bytes, void* buffer)
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{
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if (m_pos + bytes > m_size)
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bytes = m_size - m_pos;
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memcpy(buffer, (m_buffer + m_pos), bytes);
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return bytes;
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}
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