<?php
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namespace BufferOperate;
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#´´½¨ÈÕÆÚ£º2012-5-16 ÏÂÎç2:46:54
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#×÷Õߣºzhouliang
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include_once 'CommFunc.php';
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//ËùÓеÄÊý¾ÝÁ÷²Ù×÷¶¼ÊÇÒÔ¸ßλÔÚÇ°µÄÐÎʽ
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//×¢Ò⣡£¡£¡ µ±°üÖеÄÊý¾Ý¹ý¶àʱ£¬ÈÝÒ×Òý·¢ÐÔÄÜÎÊÌ⣬ÒòΪÿ´Î¶ÁÈ¡£¬¶¼»áÓÐ×Ö·û´®µÄ¸´ÖÆ
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#¶ÁÈ¡Á½¸ö×ÖµÄÄÚÈÝ£¬·µ»ØÊ®Áù½øÖÆÊý
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function ReadDWORD( &$buffer, &$nPos )
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{
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$ret=unpack( 'V', substr( $buffer, $nPos, 4 ) );
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$nPos+=4;
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return array_shift($ret);
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}
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#¶ÁÈ¡Ò»¸ö×ÖµÄÄÚÈÝ£¬·µ»ØÊ®Áù½øÖÆÊý
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function ReadWORD( &$buffer, &$nPos )
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{
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$ret=unpack( 'v', substr( $buffer, $nPos, 2 ) );
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$nPos+=2;
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return array_shift($ret);
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}
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function ReadBYTE( &$buffer, &$nPos )
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{
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$ret=unpack( 'C', substr( $buffer, $nPos, 1 ) );
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$nPos+=1;
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return array_shift($ret);
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}
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function ReadFloat(&$buffer, &$nPos)
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{
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$ret = unpack('f', substr($buffer, $nPos, 4));
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$nPos += 4;
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return array_shift($ret);
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}
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function ReadDouble(&$buffer, &$nPos)
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{
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$ret = unpack('d', substr($buffer, $nPos, 8));
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$nPos += 8;
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return array_shift($ret);
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}
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#¶ÁÈ¡×Ö·û´®
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function ReadString(&$buffer, $nLen, &$nPos)
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{
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$ret=substr( $buffer, $nPos, $nLen );
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$nPos += $nLen;
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return $ret;
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}
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function WriteBYTE(&$buffer, $value)
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{
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$buffer .= pack('C', $value);
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return $buffer;
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}
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function WriteWORD(&$buffer, $value)
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{
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$buffer .= pack('v', $value);
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return $buffer;
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}
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function WriteDWORD(&$buffer, $value)
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{
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$buffer .= pack('V', $value);
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return $buffer;
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}
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function WriteFloat(&$buffer, $value)
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{
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$buffer .= pack('f', $value);
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return $buffer;
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}
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function WriteDouble(&$buffer, $value)
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{
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$buffer .= pack('d', $value);
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return $buffer;
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}
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function WriteString(&$buffer, $len, $value)
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{
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$buffer .= substr( $value, 0, $len );
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return $buffer;
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}
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?>
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