1796 lines
41 KiB
C++
1796 lines
41 KiB
C++
//===== Copyright © 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// $Header: $
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// $NoKeywords: $
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//
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// Serialization buffer
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//===========================================================================//
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#pragma warning (disable : 4514)
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#include "utlbuffer.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "tier1/strtools.h"
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#include "tier1/characterset.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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//-----------------------------------------------------------------------------
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// Character conversions for C strings
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//-----------------------------------------------------------------------------
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class CUtlCStringConversion : public CUtlCharConversion
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{
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public:
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CUtlCStringConversion( char nEscapeChar, const char *pDelimiter, int nCount, ConversionArray_t *pArray );
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// Finds a conversion for the passed-in string, returns length
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virtual char FindConversion( const char *pString, int *pLength );
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private:
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char m_pConversion[256];
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};
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//-----------------------------------------------------------------------------
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// Character conversions for no-escape sequence strings
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//-----------------------------------------------------------------------------
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class CUtlNoEscConversion : public CUtlCharConversion
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{
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public:
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CUtlNoEscConversion( char nEscapeChar, const char *pDelimiter, int nCount, ConversionArray_t *pArray ) :
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CUtlCharConversion( nEscapeChar, pDelimiter, nCount, pArray ) {}
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// Finds a conversion for the passed-in string, returns length
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virtual char FindConversion( const char *pString, int *pLength ) { *pLength = 0; return 0; }
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};
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//-----------------------------------------------------------------------------
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// List of character conversions
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//-----------------------------------------------------------------------------
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BEGIN_CUSTOM_CHAR_CONVERSION( CUtlCStringConversion, s_StringCharConversion, "\"", '\\' )
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{ '\n', "n" },
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{ '\t', "t" },
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{ '\v', "v" },
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{ '\b', "b" },
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{ '\r', "r" },
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{ '\f', "f" },
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{ '\a', "a" },
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{ '\\', "\\" },
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{ '\?', "\?" },
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{ '\'', "\'" },
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{ '\"', "\"" },
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END_CUSTOM_CHAR_CONVERSION( CUtlCStringConversion, s_StringCharConversion, "\"", '\\' )
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CUtlCharConversion *GetCStringCharConversion()
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{
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return &s_StringCharConversion;
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}
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BEGIN_CUSTOM_CHAR_CONVERSION( CUtlNoEscConversion, s_NoEscConversion, "\"", 0x7F )
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{ 0x7F, "" },
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END_CUSTOM_CHAR_CONVERSION( CUtlNoEscConversion, s_NoEscConversion, "\"", 0x7F )
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CUtlCharConversion *GetNoEscCharConversion()
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{
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return &s_NoEscConversion;
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}
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//-----------------------------------------------------------------------------
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// Constructor
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//-----------------------------------------------------------------------------
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CUtlCStringConversion::CUtlCStringConversion( char nEscapeChar, const char *pDelimiter, int nCount, ConversionArray_t *pArray ) :
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CUtlCharConversion( nEscapeChar, pDelimiter, nCount, pArray )
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{
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memset( m_pConversion, 0x0, sizeof(m_pConversion) );
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for ( int i = 0; i < nCount; ++i )
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{
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m_pConversion[ (unsigned char)(pArray[i].m_pReplacementString[0]) ] = pArray[i].m_nActualChar;
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}
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}
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// Finds a conversion for the passed-in string, returns length
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char CUtlCStringConversion::FindConversion( const char *pString, int *pLength )
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{
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char c = m_pConversion[ (unsigned char)( pString[0] ) ];
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*pLength = (c != '\0') ? 1 : 0;
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return c;
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}
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//-----------------------------------------------------------------------------
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// Constructor
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//-----------------------------------------------------------------------------
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CUtlCharConversion::CUtlCharConversion( char nEscapeChar, const char *pDelimiter, int nCount, ConversionArray_t *pArray )
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{
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m_nEscapeChar = nEscapeChar;
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m_pDelimiter = pDelimiter;
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m_nCount = nCount;
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m_nDelimiterLength = V_strlen( pDelimiter );
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m_nMaxConversionLength = 0;
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memset( m_pReplacements, 0, sizeof(m_pReplacements) );
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for ( int i = 0; i < nCount; ++i )
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{
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m_pList[i] = pArray[i].m_nActualChar;
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ConversionInfo_t &info = m_pReplacements[ (unsigned char)( m_pList[i] ) ];
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Assert( info.m_pReplacementString == 0 );
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info.m_pReplacementString = pArray[i].m_pReplacementString;
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info.m_nLength = V_strlen( info.m_pReplacementString );
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if ( info.m_nLength > m_nMaxConversionLength )
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{
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m_nMaxConversionLength = info.m_nLength;
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}
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}
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}
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//-----------------------------------------------------------------------------
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// Escape character + delimiter
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//-----------------------------------------------------------------------------
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char CUtlCharConversion::GetEscapeChar() const
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{
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return m_nEscapeChar;
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}
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const char *CUtlCharConversion::GetDelimiter() const
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{
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return m_pDelimiter;
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}
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int CUtlCharConversion::GetDelimiterLength() const
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{
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return m_nDelimiterLength;
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}
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//-----------------------------------------------------------------------------
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// Constructor
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//-----------------------------------------------------------------------------
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const char *CUtlCharConversion::GetConversionString( char c ) const
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{
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return m_pReplacements[ (unsigned char)c ].m_pReplacementString;
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}
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int CUtlCharConversion::GetConversionLength( char c ) const
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{
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return m_pReplacements[ (unsigned char)c ].m_nLength;
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}
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int CUtlCharConversion::MaxConversionLength() const
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{
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return m_nMaxConversionLength;
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}
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//-----------------------------------------------------------------------------
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// Finds a conversion for the passed-in string, returns length
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//-----------------------------------------------------------------------------
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char CUtlCharConversion::FindConversion( const char *pString, int *pLength )
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{
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for ( int i = 0; i < m_nCount; ++i )
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{
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if ( !V_strcmp( pString, m_pReplacements[ (unsigned char)( m_pList[i] ) ].m_pReplacementString ) )
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{
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*pLength = m_pReplacements[ (unsigned char)( m_pList[i] ) ].m_nLength;
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return m_pList[i];
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}
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}
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*pLength = 0;
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return '\0';
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}
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//-----------------------------------------------------------------------------
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// constructors
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//-----------------------------------------------------------------------------
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CUtlBuffer::CUtlBuffer( int growSize, int initSize, int nFlags ) :
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m_Error(0)
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{
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MEM_ALLOC_CREDIT();
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m_Memory.Init( growSize, initSize );
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m_Get = 0;
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m_Put = 0;
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m_nTab = 0;
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m_nOffset = 0;
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m_Flags = nFlags;
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if ( (initSize != 0) && !IsReadOnly() )
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{
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m_nMaxPut = -1;
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AddNullTermination( m_Put );
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}
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else
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{
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m_nMaxPut = 0;
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}
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SetOverflowFuncs( &CUtlBuffer::GetOverflow, &CUtlBuffer::PutOverflow );
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}
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CUtlBuffer::CUtlBuffer( const void *pBuffer, int nSize, int nFlags ) :
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m_Memory( (unsigned char*)pBuffer, nSize ), m_Error(0)
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{
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Assert( nSize != 0 );
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m_Get = 0;
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m_Put = 0;
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m_nTab = 0;
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m_nOffset = 0;
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m_Flags = nFlags;
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if ( IsReadOnly() )
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{
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m_nMaxPut = m_Put = nSize;
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}
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else
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{
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m_nMaxPut = -1;
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AddNullTermination( m_Put );
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}
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SetOverflowFuncs( &CUtlBuffer::GetOverflow, &CUtlBuffer::PutOverflow );
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}
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//-----------------------------------------------------------------------------
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// Modifies the buffer to be binary or text; Blows away the buffer and the CONTAINS_CRLF value.
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//-----------------------------------------------------------------------------
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void CUtlBuffer::SetBufferType( bool bIsText, bool bContainsCRLF )
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{
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#ifdef _DEBUG
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// If the buffer is empty, there is no opportunity for this stuff to fail
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if ( TellMaxPut() != 0 )
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{
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if ( IsText() )
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{
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if ( bIsText )
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{
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Assert( ContainsCRLF() == bContainsCRLF );
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}
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else
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{
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Assert( ContainsCRLF() );
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}
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}
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else
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{
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if ( bIsText )
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{
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Assert( bContainsCRLF );
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}
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}
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}
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#endif
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if ( bIsText )
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{
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m_Flags |= TEXT_BUFFER;
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}
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else
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{
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m_Flags &= ~TEXT_BUFFER;
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}
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if ( bContainsCRLF )
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{
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m_Flags |= CONTAINS_CRLF;
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}
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else
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{
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m_Flags &= ~CONTAINS_CRLF;
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}
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}
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//-----------------------------------------------------------------------------
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// Attaches the buffer to external memory....
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//-----------------------------------------------------------------------------
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void CUtlBuffer::SetExternalBuffer( void* pMemory, int nSize, int nInitialPut, int nFlags )
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{
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m_Memory.SetExternalBuffer( (unsigned char*)pMemory, nSize );
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// Reset all indices; we just changed memory
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m_Get = 0;
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m_Put = nInitialPut;
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m_nTab = 0;
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m_Error = 0;
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m_nOffset = 0;
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m_Flags = nFlags;
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m_nMaxPut = -1;
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AddNullTermination( m_Put );
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}
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//-----------------------------------------------------------------------------
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// Assumes an external buffer but manages its deletion
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//-----------------------------------------------------------------------------
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void CUtlBuffer::AssumeMemory( void *pMemory, int nSize, int nInitialPut, int nFlags )
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{
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m_Memory.AssumeMemory( (unsigned char*) pMemory, nSize );
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// Reset all indices; we just changed memory
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m_Get = 0;
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m_Put = nInitialPut;
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m_nTab = 0;
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m_Error = 0;
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m_nOffset = 0;
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m_Flags = nFlags;
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m_nMaxPut = -1;
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AddNullTermination( m_Put );
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}
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//-----------------------------------------------------------------------------
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// Allows the caller to control memory
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//-----------------------------------------------------------------------------
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void* CUtlBuffer::DetachMemory()
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{
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// Reset all indices; we just changed memory
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m_Get = 0;
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m_Put = 0;
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m_nTab = 0;
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m_Error = 0;
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m_nOffset = 0;
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return m_Memory.DetachMemory( );
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}
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//-----------------------------------------------------------------------------
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// Makes sure we've got at least this much memory
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//-----------------------------------------------------------------------------
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void CUtlBuffer::EnsureCapacity( int num )
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{
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MEM_ALLOC_CREDIT();
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// Add one extra for the null termination
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num += 1;
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if ( m_Memory.IsExternallyAllocated() )
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{
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if ( IsGrowable() && ( m_Memory.NumAllocated() < num ) )
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{
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m_Memory.ConvertToGrowableMemory( 0 );
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}
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else
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{
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num -= 1;
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}
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}
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m_Memory.EnsureCapacity( num );
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}
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//-----------------------------------------------------------------------------
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// Base get method from which all others derive
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//-----------------------------------------------------------------------------
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void CUtlBuffer::Get( void* pMem, int size )
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{
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if ( size > 0 && CheckGet( size ) )
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{
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memcpy( pMem, &m_Memory[m_Get - m_nOffset], size );
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m_Get += size;
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}
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}
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//-----------------------------------------------------------------------------
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// This will get at least 1 byte and up to nSize bytes.
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// It will return the number of bytes actually read.
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//-----------------------------------------------------------------------------
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int CUtlBuffer::GetUpTo( void *pMem, int nSize )
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{
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if ( CheckArbitraryPeekGet( 0, nSize ) )
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{
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memcpy( pMem, &m_Memory[m_Get - m_nOffset], nSize );
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m_Get += nSize;
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return nSize;
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Eats whitespace
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//-----------------------------------------------------------------------------
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void CUtlBuffer::EatWhiteSpace()
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{
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if ( IsText() && IsValid() )
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{
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while ( CheckGet( sizeof(char) ) )
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{
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if ( !V_isspace( *(const unsigned char*)PeekGet() ) )
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break;
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m_Get += sizeof(char);
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}
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}
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}
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//-----------------------------------------------------------------------------
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// Eats C++ style comments
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//-----------------------------------------------------------------------------
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bool CUtlBuffer::EatCPPComment()
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{
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if ( IsText() && IsValid() )
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{
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// If we don't have a a c++ style comment next, we're done
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const char *pPeek = (const char *)PeekGet( 2 * sizeof(char), 0 );
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if ( !pPeek || ( pPeek[0] != '/' ) || ( pPeek[1] != '/' ) )
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return false;
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// Deal with c++ style comments
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m_Get += 2;
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// read complete line
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for ( char c = GetChar(); IsValid(); c = GetChar() )
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{
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if ( c == '\n' )
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break;
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}
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return true;
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}
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return false;
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}
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//-----------------------------------------------------------------------------
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// Peeks how much whitespace to eat
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//-----------------------------------------------------------------------------
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int CUtlBuffer::PeekWhiteSpace( int nOffset )
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{
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if ( !IsText() || !IsValid() )
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return 0;
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while ( CheckPeekGet( nOffset, sizeof(char) ) )
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{
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if ( !V_isspace( *(unsigned char*)PeekGet( nOffset ) ) )
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break;
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nOffset += sizeof(char);
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}
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return nOffset;
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}
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//-----------------------------------------------------------------------------
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// Peek size of sting to come, check memory bound
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//-----------------------------------------------------------------------------
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int CUtlBuffer::PeekStringLength()
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{
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if ( !IsValid() )
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return 0;
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// Eat preceeding whitespace
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int nOffset = 0;
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if ( IsText() )
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{
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nOffset = PeekWhiteSpace( nOffset );
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}
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int nStartingOffset = nOffset;
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do
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{
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int nPeekAmount = 128;
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// NOTE: Add 1 for the terminating zero!
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if ( !CheckArbitraryPeekGet( nOffset, nPeekAmount ) )
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{
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if ( nOffset == nStartingOffset )
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return 0;
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return nOffset - nStartingOffset + 1;
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}
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const char *pTest = (const char *)PeekGet( nOffset );
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if ( !IsText() )
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{
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for ( int i = 0; i < nPeekAmount; ++i )
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{
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// The +1 here is so we eat the terminating 0
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if ( pTest[i] == 0 )
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return (i + nOffset - nStartingOffset + 1);
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}
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}
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else
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{
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for ( int i = 0; i < nPeekAmount; ++i )
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{
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// The +1 here is so we eat the terminating 0
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if ( V_isspace((unsigned char)pTest[i]) || (pTest[i] == 0) )
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return (i + nOffset - nStartingOffset + 1);
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}
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}
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nOffset += nPeekAmount;
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} while ( true );
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}
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//-----------------------------------------------------------------------------
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// Peek size of line to come, check memory bound
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//-----------------------------------------------------------------------------
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int CUtlBuffer::PeekLineLength()
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{
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if ( !IsValid() )
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return 0;
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int nOffset = 0;
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int nStartingOffset = nOffset;
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do
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{
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int nPeekAmount = 128;
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// NOTE: Add 1 for the terminating zero!
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if ( !CheckArbitraryPeekGet( nOffset, nPeekAmount ) )
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{
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if ( nOffset == nStartingOffset )
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return 0;
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return nOffset - nStartingOffset + 1;
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}
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const char *pTest = (const char *)PeekGet( nOffset );
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for ( int i = 0; i < nPeekAmount; ++i )
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{
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// The +2 here is so we eat the terminating '\n' and 0
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if ( pTest[i] == '\n' || pTest[i] == '\r' )
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return (i + nOffset - nStartingOffset + 2);
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// The +1 here is so we eat the terminating 0
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if ( pTest[i] == 0 )
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return (i + nOffset - nStartingOffset + 1);
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}
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nOffset += nPeekAmount;
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} while ( true );
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}
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//-----------------------------------------------------------------------------
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// Does the next bytes of the buffer match a pattern?
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//-----------------------------------------------------------------------------
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bool CUtlBuffer::PeekStringMatch( int nOffset, const char *pString, int nLen )
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{
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if ( !CheckPeekGet( nOffset, nLen ) )
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return false;
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return !V_strncmp( (const char*)PeekGet(nOffset), pString, nLen );
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}
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|
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|
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//-----------------------------------------------------------------------------
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// This version of PeekStringLength converts \" to \\ and " to \, etc.
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// It also reads a " at the beginning and end of the string
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//-----------------------------------------------------------------------------
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int CUtlBuffer::PeekDelimitedStringLength( CUtlCharConversion *pConv, bool bActualSize )
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{
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if ( !IsText() || !pConv )
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return PeekStringLength();
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|
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// Eat preceeding whitespace
|
|
int nOffset = 0;
|
|
if ( IsText() )
|
|
{
|
|
nOffset = PeekWhiteSpace( nOffset );
|
|
}
|
|
|
|
if ( !PeekStringMatch( nOffset, pConv->GetDelimiter(), pConv->GetDelimiterLength() ) )
|
|
return 0;
|
|
|
|
// Try to read ending ", but don't accept \"
|
|
int nActualStart = nOffset;
|
|
nOffset += pConv->GetDelimiterLength();
|
|
int nLen = 1; // Starts at 1 for the '\0' termination
|
|
|
|
do
|
|
{
|
|
if ( PeekStringMatch( nOffset, pConv->GetDelimiter(), pConv->GetDelimiterLength() ) )
|
|
break;
|
|
|
|
if ( !CheckPeekGet( nOffset, 1 ) )
|
|
break;
|
|
|
|
char c = *(const char*)PeekGet( nOffset );
|
|
++nLen;
|
|
++nOffset;
|
|
if ( c == pConv->GetEscapeChar() )
|
|
{
|
|
int nLength = pConv->MaxConversionLength();
|
|
if ( !CheckArbitraryPeekGet( nOffset, nLength ) )
|
|
break;
|
|
|
|
pConv->FindConversion( (const char*)PeekGet(nOffset), &nLength );
|
|
nOffset += nLength;
|
|
}
|
|
} while (true);
|
|
|
|
return bActualSize ? nLen : nOffset - nActualStart + pConv->GetDelimiterLength() + 1;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Reads a null-terminated string
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::GetString( char* pString, int nMaxChars )
|
|
{
|
|
if (!IsValid())
|
|
{
|
|
*pString = 0;
|
|
return;
|
|
}
|
|
|
|
if ( nMaxChars == 0 )
|
|
{
|
|
nMaxChars = INT_MAX;
|
|
}
|
|
|
|
// Remember, this *includes* the null character
|
|
// It will be 0, however, if the buffer is empty.
|
|
int nLen = PeekStringLength();
|
|
|
|
if ( IsText() )
|
|
{
|
|
EatWhiteSpace();
|
|
}
|
|
|
|
if ( nLen == 0 )
|
|
{
|
|
*pString = 0;
|
|
m_Error |= GET_OVERFLOW;
|
|
return;
|
|
}
|
|
|
|
// Strip off the terminating NULL
|
|
if ( nLen <= nMaxChars )
|
|
{
|
|
Get( pString, nLen - 1 );
|
|
pString[ nLen - 1 ] = 0;
|
|
}
|
|
else
|
|
{
|
|
Get( pString, nMaxChars - 1 );
|
|
pString[ nMaxChars - 1 ] = 0;
|
|
// skip the remaining characters, EXCEPT the terminating null
|
|
// thus it's ( nLen - ( nMaxChars - 1 ) - 1 )
|
|
SeekGet( SEEK_CURRENT, nLen - nMaxChars );
|
|
}
|
|
|
|
// Read the terminating NULL in binary formats
|
|
if ( !IsText() )
|
|
{
|
|
VerifyEquals( GetChar(), 0 );
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Reads up to and including the first \n
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::GetLine( char* pLine, int nMaxChars )
|
|
{
|
|
Assert( IsText() && !ContainsCRLF() );
|
|
|
|
if ( !IsValid() )
|
|
{
|
|
*pLine = 0;
|
|
return;
|
|
}
|
|
|
|
if ( nMaxChars == 0 )
|
|
{
|
|
nMaxChars = INT_MAX;
|
|
}
|
|
|
|
// Remember, this *includes* the null character
|
|
// It will be 0, however, if the buffer is empty.
|
|
int nLen = PeekLineLength();
|
|
if ( nLen == 0 )
|
|
{
|
|
*pLine = 0;
|
|
m_Error |= GET_OVERFLOW;
|
|
return;
|
|
}
|
|
|
|
// Strip off the terminating NULL
|
|
if ( nLen <= nMaxChars )
|
|
{
|
|
Get( pLine, nLen - 1 );
|
|
pLine[ nLen - 1 ] = 0;
|
|
}
|
|
else
|
|
{
|
|
Get( pLine, nMaxChars - 1 );
|
|
pLine[ nMaxChars - 1 ] = 0;
|
|
SeekGet( SEEK_CURRENT, nLen - 1 - nMaxChars );
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// This version of GetString converts \ to \\ and " to \", etc.
|
|
// It also places " at the beginning and end of the string
|
|
//-----------------------------------------------------------------------------
|
|
char CUtlBuffer::GetDelimitedCharInternal( CUtlCharConversion *pConv )
|
|
{
|
|
char c = GetChar();
|
|
if ( c == pConv->GetEscapeChar() )
|
|
{
|
|
int nLength = pConv->MaxConversionLength();
|
|
if ( !CheckArbitraryPeekGet( 0, nLength ) )
|
|
return '\0';
|
|
|
|
c = pConv->FindConversion( (const char *)PeekGet(), &nLength );
|
|
SeekGet( SEEK_CURRENT, nLength );
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
char CUtlBuffer::GetDelimitedChar( CUtlCharConversion *pConv )
|
|
{
|
|
if ( !IsText() || !pConv )
|
|
return GetChar( );
|
|
return GetDelimitedCharInternal( pConv );
|
|
}
|
|
|
|
void CUtlBuffer::GetDelimitedString( CUtlCharConversion *pConv, char *pString, int nMaxChars )
|
|
{
|
|
if ( !IsText() || !pConv )
|
|
{
|
|
GetString( pString, nMaxChars );
|
|
return;
|
|
}
|
|
|
|
if (!IsValid())
|
|
{
|
|
*pString = 0;
|
|
return;
|
|
}
|
|
|
|
if ( nMaxChars == 0 )
|
|
{
|
|
nMaxChars = INT_MAX;
|
|
}
|
|
|
|
EatWhiteSpace();
|
|
if ( !PeekStringMatch( 0, pConv->GetDelimiter(), pConv->GetDelimiterLength() ) )
|
|
return;
|
|
|
|
// Pull off the starting delimiter
|
|
SeekGet( SEEK_CURRENT, pConv->GetDelimiterLength() );
|
|
|
|
int nRead = 0;
|
|
while ( IsValid() )
|
|
{
|
|
if ( PeekStringMatch( 0, pConv->GetDelimiter(), pConv->GetDelimiterLength() ) )
|
|
{
|
|
SeekGet( SEEK_CURRENT, pConv->GetDelimiterLength() );
|
|
break;
|
|
}
|
|
|
|
char c = GetDelimitedCharInternal( pConv );
|
|
|
|
if ( nRead < nMaxChars )
|
|
{
|
|
pString[nRead] = c;
|
|
++nRead;
|
|
}
|
|
}
|
|
|
|
if ( nRead >= nMaxChars )
|
|
{
|
|
nRead = nMaxChars - 1;
|
|
}
|
|
pString[nRead] = '\0';
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Checks if a get is ok
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::CheckGet( int nSize )
|
|
{
|
|
if ( m_Error & GET_OVERFLOW )
|
|
return false;
|
|
|
|
if ( TellMaxPut() < m_Get + nSize )
|
|
{
|
|
m_Error |= GET_OVERFLOW;
|
|
return false;
|
|
}
|
|
|
|
if ( ( m_Get < m_nOffset ) || ( m_Memory.NumAllocated() < m_Get - m_nOffset + nSize ) )
|
|
{
|
|
if ( !OnGetOverflow( nSize ) )
|
|
{
|
|
m_Error |= GET_OVERFLOW;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Checks if a peek get is ok
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::CheckPeekGet( int nOffset, int nSize )
|
|
{
|
|
if ( m_Error & GET_OVERFLOW )
|
|
return false;
|
|
|
|
// Checking for peek can't set the overflow flag
|
|
bool bOk = CheckGet( nOffset + nSize );
|
|
m_Error &= ~GET_OVERFLOW;
|
|
return bOk;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Call this to peek arbitrarily long into memory. It doesn't fail unless
|
|
// it can't read *anything* new
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::CheckArbitraryPeekGet( int nOffset, int &nIncrement )
|
|
{
|
|
if ( TellGet() + nOffset >= TellMaxPut() )
|
|
{
|
|
nIncrement = 0;
|
|
return false;
|
|
}
|
|
|
|
if ( TellGet() + nOffset + nIncrement > TellMaxPut() )
|
|
{
|
|
nIncrement = TellMaxPut() - TellGet() - nOffset;
|
|
}
|
|
|
|
// NOTE: CheckPeekGet could modify TellMaxPut for streaming files
|
|
// We have to call TellMaxPut again here
|
|
CheckPeekGet( nOffset, nIncrement );
|
|
int nMaxGet = TellMaxPut() - TellGet();
|
|
if ( nMaxGet < nIncrement )
|
|
{
|
|
nIncrement = nMaxGet;
|
|
}
|
|
return (nIncrement != 0);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Peek part of the butt
|
|
//-----------------------------------------------------------------------------
|
|
const void* CUtlBuffer::PeekGet( int nMaxSize, int nOffset )
|
|
{
|
|
if ( !CheckPeekGet( nOffset, nMaxSize ) )
|
|
return NULL;
|
|
return &m_Memory[ m_Get + nOffset - m_nOffset ];
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Change where I'm reading
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::SeekGet( SeekType_t type, int offset )
|
|
{
|
|
switch( type )
|
|
{
|
|
case SEEK_HEAD:
|
|
m_Get = offset;
|
|
break;
|
|
|
|
case SEEK_CURRENT:
|
|
m_Get += offset;
|
|
break;
|
|
|
|
case SEEK_TAIL:
|
|
m_Get = m_nMaxPut - offset;
|
|
break;
|
|
}
|
|
|
|
if ( m_Get > m_nMaxPut )
|
|
{
|
|
m_Error |= GET_OVERFLOW;
|
|
}
|
|
else
|
|
{
|
|
m_Error &= ~GET_OVERFLOW;
|
|
if ( m_Get < m_nOffset || m_Get >= m_nOffset + Size() )
|
|
{
|
|
OnGetOverflow( -1 );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Parse...
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#pragma warning ( disable : 4706 )
|
|
|
|
int CUtlBuffer::VaScanf( const char* pFmt, va_list list )
|
|
{
|
|
Assert( pFmt );
|
|
if ( m_Error || !IsText() )
|
|
return 0;
|
|
|
|
int numScanned = 0;
|
|
char c;
|
|
while ( c = *pFmt++ )
|
|
{
|
|
// Stop if we hit the end of the buffer
|
|
if ( m_Get >= TellMaxPut() )
|
|
{
|
|
m_Error |= GET_OVERFLOW;
|
|
break;
|
|
}
|
|
|
|
switch (c)
|
|
{
|
|
case ' ':
|
|
// eat all whitespace
|
|
EatWhiteSpace();
|
|
break;
|
|
|
|
case '%':
|
|
{
|
|
// Conversion character... try to convert baby!
|
|
char type = *pFmt++;
|
|
if (type == 0)
|
|
return numScanned;
|
|
|
|
switch(type)
|
|
{
|
|
case 'c':
|
|
{
|
|
char* ch = va_arg( list, char * );
|
|
if ( CheckPeekGet( 0, sizeof(char) ) )
|
|
{
|
|
*ch = *(const char*)PeekGet();
|
|
++m_Get;
|
|
}
|
|
else
|
|
{
|
|
*ch = 0;
|
|
return numScanned;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'h':
|
|
{
|
|
if ( *pFmt == 'd' || *pFmt == 'i' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, int16 * ) ) )
|
|
return numScanned; // only support short ints, don't bother with hex
|
|
}
|
|
else if ( *pFmt == 'u' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, uint16 * ) ) )
|
|
return numScanned;
|
|
}
|
|
else
|
|
return numScanned;
|
|
++pFmt;
|
|
}
|
|
break;
|
|
|
|
case 'I':
|
|
{
|
|
if ( *pFmt++ != '6' || *pFmt++ != '4' )
|
|
return numScanned; // only support "I64d" and "I64u"
|
|
|
|
if ( *pFmt == 'd' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, int64 * ) ) )
|
|
return numScanned;
|
|
}
|
|
else if ( *pFmt == 'u' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, uint64 * ) ) )
|
|
return numScanned;
|
|
}
|
|
else
|
|
{
|
|
return numScanned;
|
|
}
|
|
|
|
++pFmt;
|
|
}
|
|
break;
|
|
|
|
case 'i':
|
|
case 'd':
|
|
{
|
|
int32 *pArg = va_arg( list, int32 * );
|
|
if ( !GetTypeText( *pArg ) )
|
|
return numScanned;
|
|
}
|
|
break;
|
|
|
|
case 'x':
|
|
{
|
|
uint32 *pArg = va_arg( list, uint32 * );
|
|
if ( !GetTypeText( *pArg, 16 ) )
|
|
return numScanned;
|
|
}
|
|
break;
|
|
|
|
case 'u':
|
|
{
|
|
uint32 *pArg = va_arg( list, uint32 * );
|
|
if ( !GetTypeText( *pArg ) )
|
|
return numScanned;
|
|
}
|
|
break;
|
|
|
|
case 'l':
|
|
{
|
|
// we currently support %lf and %lld
|
|
if ( *pFmt == 'f' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, double * ) ) )
|
|
return numScanned;
|
|
}
|
|
else if ( *pFmt == 'l' && *++pFmt == 'd' )
|
|
{
|
|
if ( !GetTypeText( *va_arg( list, int64 * ) ) )
|
|
return numScanned;
|
|
}
|
|
else
|
|
return numScanned;
|
|
}
|
|
break;
|
|
|
|
case 'f':
|
|
{
|
|
float *pArg = va_arg( list, float * );
|
|
if ( !GetTypeText( *pArg ) )
|
|
return numScanned;
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
{
|
|
char* s = va_arg( list, char * );
|
|
GetString( s );
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
// unimplemented scanf type
|
|
Assert(0);
|
|
return numScanned;
|
|
}
|
|
break;
|
|
}
|
|
|
|
++numScanned;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
// Here we have to match the format string character
|
|
// against what's in the buffer or we're done.
|
|
if ( !CheckPeekGet( 0, sizeof(char) ) )
|
|
return numScanned;
|
|
|
|
if ( c != *(const char*)PeekGet() )
|
|
return numScanned;
|
|
|
|
++m_Get;
|
|
}
|
|
}
|
|
}
|
|
return numScanned;
|
|
}
|
|
|
|
#pragma warning ( default : 4706 )
|
|
|
|
int CUtlBuffer::Scanf( const char* pFmt, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, pFmt );
|
|
int count = VaScanf( pFmt, args );
|
|
va_end( args );
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Advance the get index until after the particular string is found
|
|
// Do not eat whitespace before starting. Return false if it failed
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::GetToken( const char *pToken )
|
|
{
|
|
Assert( pToken );
|
|
|
|
// Look for the token
|
|
int nLen = V_strlen( pToken );
|
|
|
|
// First time through on streaming, check what we already have loaded
|
|
// if we have enough loaded to do the check
|
|
int nMaxSize = Size() - ( TellGet() - m_nOffset );
|
|
if ( nMaxSize <= nLen )
|
|
{
|
|
nMaxSize = Size();
|
|
}
|
|
int nSizeRemaining = TellMaxPut() - TellGet();
|
|
|
|
int nGet = TellGet();
|
|
while ( nSizeRemaining >= nLen )
|
|
{
|
|
bool bOverFlow = ( nSizeRemaining > nMaxSize );
|
|
int nSizeToCheck = bOverFlow ? nMaxSize : nSizeRemaining;
|
|
if ( !CheckPeekGet( 0, nSizeToCheck ) )
|
|
break;
|
|
|
|
const char *pBufStart = (const char*)PeekGet();
|
|
const char *pFoundEnd = V_strnistr( pBufStart, pToken, nSizeToCheck );
|
|
|
|
// Time to be careful: if we are in a state of overflow
|
|
// (namely, there's more of the buffer beyond the current window)
|
|
// we could be looking for 'foo' for example, and find 'foobar'
|
|
// if 'foo' happens to be the last 3 characters of the current window
|
|
size_t nOffset = (size_t)pFoundEnd - (size_t)pBufStart;
|
|
bool bPotentialMismatch = ( bOverFlow && ( (int)nOffset == Size() - nLen ) );
|
|
if ( !pFoundEnd || bPotentialMismatch )
|
|
{
|
|
nSizeRemaining -= nSizeToCheck;
|
|
if ( !pFoundEnd && ( nSizeRemaining < nLen ) )
|
|
break;
|
|
|
|
// Second time through, stream as much in as possible
|
|
// But keep the last portion of the current buffer
|
|
// since we couldn't check it against stuff outside the window
|
|
nSizeRemaining += nLen;
|
|
nMaxSize = Size();
|
|
SeekGet( CUtlBuffer::SEEK_CURRENT, nSizeToCheck - nLen );
|
|
continue;
|
|
}
|
|
|
|
// Seek past the end of the found string
|
|
SeekGet( CUtlBuffer::SEEK_CURRENT, (int)( nOffset + nLen ) );
|
|
return true;
|
|
}
|
|
|
|
// Didn't find a match, leave the get index where it was to start with
|
|
SeekGet( CUtlBuffer::SEEK_HEAD, nGet );
|
|
return false;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// (For text buffers only)
|
|
// Parse a token from the buffer:
|
|
// Grab all text that lies between a starting delimiter + ending delimiter
|
|
// (skipping whitespace that leads + trails both delimiters).
|
|
// Note the delimiter checks are case-insensitive.
|
|
// If successful, the get index is advanced and the function returns true,
|
|
// otherwise the index is not advanced and the function returns false.
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::ParseToken( const char *pStartingDelim, const char *pEndingDelim, char* pString, int nMaxLen )
|
|
{
|
|
int nCharsToCopy = 0;
|
|
int nCurrentGet = 0;
|
|
|
|
size_t nEndingDelimLen;
|
|
|
|
// Starting delimiter is optional
|
|
char emptyBuf = '\0';
|
|
if ( !pStartingDelim )
|
|
{
|
|
pStartingDelim = &emptyBuf;
|
|
}
|
|
|
|
// Ending delimiter is not
|
|
Assert( pEndingDelim && pEndingDelim[0] );
|
|
nEndingDelimLen = V_strlen( pEndingDelim );
|
|
|
|
int nStartGet = TellGet();
|
|
char nCurrChar;
|
|
int nTokenStart = -1;
|
|
EatWhiteSpace( );
|
|
while ( *pStartingDelim )
|
|
{
|
|
nCurrChar = *pStartingDelim++;
|
|
if ( !V_isspace((unsigned char)nCurrChar) )
|
|
{
|
|
if ( tolower( GetChar() ) != tolower( nCurrChar ) )
|
|
goto parseFailed;
|
|
}
|
|
else
|
|
{
|
|
EatWhiteSpace();
|
|
}
|
|
}
|
|
|
|
EatWhiteSpace();
|
|
nTokenStart = TellGet();
|
|
if ( !GetToken( pEndingDelim ) )
|
|
goto parseFailed;
|
|
|
|
nCurrentGet = TellGet();
|
|
nCharsToCopy = (int)( (nCurrentGet - nEndingDelimLen) - nTokenStart );
|
|
if ( nCharsToCopy >= nMaxLen )
|
|
{
|
|
nCharsToCopy = nMaxLen - 1;
|
|
}
|
|
|
|
if ( nCharsToCopy > 0 )
|
|
{
|
|
SeekGet( CUtlBuffer::SEEK_HEAD, nTokenStart );
|
|
Get( pString, nCharsToCopy );
|
|
if ( !IsValid() )
|
|
goto parseFailed;
|
|
|
|
// Eat trailing whitespace
|
|
for ( ; nCharsToCopy > 0; --nCharsToCopy )
|
|
{
|
|
if ( !V_isspace( (unsigned char)pString[ nCharsToCopy-1 ] ) )
|
|
break;
|
|
}
|
|
}
|
|
pString[ nCharsToCopy ] = '\0';
|
|
|
|
// Advance the Get index
|
|
SeekGet( CUtlBuffer::SEEK_HEAD, nCurrentGet );
|
|
return true;
|
|
|
|
parseFailed:
|
|
// Revert the get index
|
|
SeekGet( SEEK_HEAD, nStartGet );
|
|
pString[0] = '\0';
|
|
return false;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Parses the next token, given a set of character breaks to stop at
|
|
//-----------------------------------------------------------------------------
|
|
int CUtlBuffer::ParseToken( characterset_t *pBreaks, char *pTokenBuf, int nMaxLen, bool bParseComments )
|
|
{
|
|
Assert( nMaxLen > 0 );
|
|
pTokenBuf[0] = 0;
|
|
|
|
// skip whitespace + comments
|
|
while ( true )
|
|
{
|
|
if ( !IsValid() )
|
|
return -1;
|
|
EatWhiteSpace();
|
|
if ( bParseComments )
|
|
{
|
|
if ( !EatCPPComment() )
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
char c = GetChar();
|
|
|
|
// End of buffer
|
|
if ( c == 0 )
|
|
return -1;
|
|
|
|
// handle quoted strings specially
|
|
if ( c == '\"' )
|
|
{
|
|
int nLen = 0;
|
|
while( IsValid() )
|
|
{
|
|
c = GetChar();
|
|
if ( c == '\"' || !c )
|
|
{
|
|
pTokenBuf[nLen] = 0;
|
|
return nLen;
|
|
}
|
|
pTokenBuf[nLen] = c;
|
|
if ( ++nLen == nMaxLen )
|
|
{
|
|
pTokenBuf[nLen-1] = 0;
|
|
return nMaxLen;
|
|
}
|
|
}
|
|
|
|
// In this case, we hit the end of the buffer before hitting the end qoute
|
|
pTokenBuf[nLen] = 0;
|
|
return nLen;
|
|
}
|
|
|
|
// parse single characters
|
|
if ( IN_CHARACTERSET( *pBreaks, c ) )
|
|
{
|
|
pTokenBuf[0] = c;
|
|
pTokenBuf[1] = 0;
|
|
return 1;
|
|
}
|
|
|
|
// parse a regular word
|
|
int nLen = 0;
|
|
while ( true )
|
|
{
|
|
pTokenBuf[nLen] = c;
|
|
if ( ++nLen == nMaxLen )
|
|
{
|
|
pTokenBuf[nLen-1] = 0;
|
|
return nMaxLen;
|
|
}
|
|
c = GetChar();
|
|
if ( !IsValid() )
|
|
break;
|
|
|
|
if ( IN_CHARACTERSET( *pBreaks, c ) || c == '\"' || c <= ' ' )
|
|
{
|
|
SeekGet( SEEK_CURRENT, -1 );
|
|
break;
|
|
}
|
|
}
|
|
|
|
pTokenBuf[nLen] = 0;
|
|
return nLen;
|
|
}
|
|
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Serialization
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::Put( const void *pMem, int size )
|
|
{
|
|
if ( size && CheckPut( size ) )
|
|
{
|
|
memcpy( &m_Memory[m_Put - m_nOffset], pMem, size );
|
|
m_Put += size;
|
|
|
|
AddNullTermination( m_Put );
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Writes a null-terminated string
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::PutString( const char* pString )
|
|
{
|
|
if (!IsText())
|
|
{
|
|
if ( pString )
|
|
{
|
|
// Not text? append a null at the end.
|
|
int nLen = (int)V_strlen( pString ) + 1;
|
|
Put( pString, nLen * sizeof(char) );
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
PutTypeBin<char>( 0 );
|
|
}
|
|
}
|
|
else if (pString)
|
|
{
|
|
int nTabCount = ( m_Flags & AUTO_TABS_DISABLED ) ? 0 : m_nTab;
|
|
if ( nTabCount > 0 )
|
|
{
|
|
if ( WasLastCharacterCR() )
|
|
{
|
|
PutTabs();
|
|
}
|
|
|
|
const char* pEndl = strchr( pString, '\n' );
|
|
while ( pEndl )
|
|
{
|
|
size_t nSize = (size_t)pEndl - (size_t)pString + sizeof(char);
|
|
Put( pString, (int)nSize );
|
|
pString = pEndl + 1;
|
|
if ( *pString )
|
|
{
|
|
PutTabs();
|
|
pEndl = strchr( pString, '\n' );
|
|
}
|
|
else
|
|
{
|
|
pEndl = NULL;
|
|
}
|
|
}
|
|
}
|
|
int nLen = (int)V_strlen( pString );
|
|
if ( nLen )
|
|
{
|
|
Put( pString, nLen * sizeof(char) );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// This version of PutString converts \ to \\ and " to \", etc.
|
|
// It also places " at the beginning and end of the string
|
|
//-----------------------------------------------------------------------------
|
|
inline void CUtlBuffer::PutDelimitedCharInternal( CUtlCharConversion *pConv, char c )
|
|
{
|
|
int l = pConv->GetConversionLength( c );
|
|
if ( l == 0 )
|
|
{
|
|
PutChar( c );
|
|
}
|
|
else
|
|
{
|
|
PutChar( pConv->GetEscapeChar() );
|
|
Put( pConv->GetConversionString( c ), l );
|
|
}
|
|
}
|
|
|
|
void CUtlBuffer::PutDelimitedChar( CUtlCharConversion *pConv, char c )
|
|
{
|
|
if ( !IsText() || !pConv )
|
|
{
|
|
PutChar( c );
|
|
return;
|
|
}
|
|
|
|
PutDelimitedCharInternal( pConv, c );
|
|
}
|
|
|
|
void CUtlBuffer::PutDelimitedString( CUtlCharConversion *pConv, const char *pString )
|
|
{
|
|
if ( !IsText() || !pConv )
|
|
{
|
|
PutString( pString );
|
|
return;
|
|
}
|
|
|
|
if ( WasLastCharacterCR() )
|
|
{
|
|
PutTabs();
|
|
}
|
|
Put( pConv->GetDelimiter(), pConv->GetDelimiterLength() );
|
|
|
|
int nLen = pString ? V_strlen( pString ) : 0;
|
|
for ( int i = 0; i < nLen; ++i )
|
|
{
|
|
PutDelimitedCharInternal( pConv, pString[i] );
|
|
}
|
|
|
|
if ( WasLastCharacterCR() )
|
|
{
|
|
PutTabs();
|
|
}
|
|
Put( pConv->GetDelimiter(), pConv->GetDelimiterLength() );
|
|
}
|
|
|
|
|
|
void CUtlBuffer::VaPrintf( const char* pFmt, va_list list )
|
|
{
|
|
char temp[8192];
|
|
int nLen = V_vsnprintf( temp, sizeof( temp ), pFmt, list );
|
|
ErrorIfNot( nLen < sizeof( temp ), ( "CUtlBuffer::VaPrintf: String overflowed buffer [%d]\n", sizeof( temp ) ) );
|
|
PutString( temp );
|
|
}
|
|
|
|
void CUtlBuffer::Printf( const char* pFmt, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, pFmt );
|
|
VaPrintf( pFmt, args );
|
|
va_end( args );
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Calls the overflow functions
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::SetOverflowFuncs( UtlBufferOverflowFunc_t getFunc, UtlBufferOverflowFunc_t putFunc )
|
|
{
|
|
m_GetOverflowFunc = getFunc;
|
|
m_PutOverflowFunc = putFunc;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Calls the overflow functions
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::OnPutOverflow( int nSize )
|
|
{
|
|
return (this->*m_PutOverflowFunc)( nSize );
|
|
}
|
|
|
|
bool CUtlBuffer::OnGetOverflow( int nSize )
|
|
{
|
|
return (this->*m_GetOverflowFunc)( nSize );
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Checks if a put is ok
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::PutOverflow( int nSize )
|
|
{
|
|
MEM_ALLOC_CREDIT();
|
|
|
|
if ( m_Memory.IsExternallyAllocated() )
|
|
{
|
|
if ( !IsGrowable() )
|
|
return false;
|
|
|
|
m_Memory.ConvertToGrowableMemory( 0 );
|
|
}
|
|
|
|
while( Size() < m_Put - m_nOffset + nSize )
|
|
{
|
|
m_Memory.Grow();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CUtlBuffer::GetOverflow( int nSize )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Checks if a put is ok
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::CheckPut( int nSize )
|
|
{
|
|
if ( ( m_Error & PUT_OVERFLOW ) || IsReadOnly() )
|
|
return false;
|
|
|
|
if ( ( m_Put < m_nOffset ) || ( m_Memory.NumAllocated() < m_Put - m_nOffset + nSize ) )
|
|
{
|
|
if ( !OnPutOverflow( nSize ) )
|
|
{
|
|
m_Error |= PUT_OVERFLOW;
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void CUtlBuffer::SeekPut( SeekType_t type, int offset )
|
|
{
|
|
int nNextPut = m_Put;
|
|
switch( type )
|
|
{
|
|
case SEEK_HEAD:
|
|
nNextPut = offset;
|
|
break;
|
|
|
|
case SEEK_CURRENT:
|
|
nNextPut += offset;
|
|
break;
|
|
|
|
case SEEK_TAIL:
|
|
nNextPut = m_nMaxPut - offset;
|
|
break;
|
|
}
|
|
|
|
// Force a write of the data
|
|
// FIXME: We could make this more optimal potentially by writing out
|
|
// the entire buffer if you seek outside the current range
|
|
|
|
// NOTE: This call will write and will also seek the file to nNextPut.
|
|
OnPutOverflow( -nNextPut-1 );
|
|
m_Put = nNextPut;
|
|
|
|
AddNullTermination( m_Put );
|
|
}
|
|
|
|
|
|
void CUtlBuffer::ActivateByteSwapping( bool bActivate )
|
|
{
|
|
m_Byteswap.ActivateByteSwapping( bActivate );
|
|
}
|
|
|
|
void CUtlBuffer::SetBigEndian( bool bigEndian )
|
|
{
|
|
m_Byteswap.SetTargetBigEndian( bigEndian );
|
|
}
|
|
|
|
bool CUtlBuffer::IsBigEndian( void )
|
|
{
|
|
return m_Byteswap.IsTargetBigEndian();
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// null terminate the buffer
|
|
// NOTE: Pass in nPut here even though it is just a copy of m_Put. This is almost always called immediately
|
|
// after modifying m_Put and this lets it stay in a register and avoid LHS on PPC.
|
|
//-----------------------------------------------------------------------------
|
|
void CUtlBuffer::AddNullTermination( int nPut )
|
|
{
|
|
if ( nPut > m_nMaxPut )
|
|
{
|
|
if ( !IsReadOnly() && ((m_Error & PUT_OVERFLOW) == 0) )
|
|
{
|
|
// Add null termination value
|
|
if ( CheckPut( 1 ) )
|
|
{
|
|
m_Memory[nPut - m_nOffset] = 0;
|
|
}
|
|
else
|
|
{
|
|
// Restore the overflow state, it was valid before...
|
|
m_Error &= ~PUT_OVERFLOW;
|
|
}
|
|
}
|
|
m_nMaxPut = nPut;
|
|
}
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Converts a buffer from a CRLF buffer to a CR buffer (and back)
|
|
// Returns false if no conversion was necessary (and outBuf is left untouched)
|
|
// If the conversion occurs, outBuf will be cleared.
|
|
//-----------------------------------------------------------------------------
|
|
bool CUtlBuffer::ConvertCRLF( CUtlBuffer &outBuf )
|
|
{
|
|
if ( !IsText() || !outBuf.IsText() )
|
|
return false;
|
|
|
|
if ( ContainsCRLF() == outBuf.ContainsCRLF() )
|
|
return false;
|
|
|
|
int nInCount = TellMaxPut();
|
|
|
|
outBuf.Purge();
|
|
outBuf.EnsureCapacity( nInCount );
|
|
|
|
bool bFromCRLF = ContainsCRLF();
|
|
|
|
// Start reading from the beginning
|
|
int nGet = TellGet();
|
|
int nPut = TellPut();
|
|
int nGetDelta = 0;
|
|
int nPutDelta = 0;
|
|
|
|
const char *pBase = (const char*)Base();
|
|
intp nCurrGet = 0;
|
|
while ( nCurrGet < nInCount )
|
|
{
|
|
const char *pCurr = &pBase[nCurrGet];
|
|
if ( bFromCRLF )
|
|
{
|
|
const char *pNext = V_strnistr( pCurr, "\r\n", nInCount - nCurrGet );
|
|
if ( !pNext )
|
|
{
|
|
outBuf.Put( pCurr, nInCount - nCurrGet );
|
|
break;
|
|
}
|
|
|
|
intp nBytes = (intp)pNext - (intp)pCurr;
|
|
outBuf.Put( pCurr, (int)nBytes );
|
|
outBuf.PutChar( '\n' );
|
|
nCurrGet += nBytes + 2;
|
|
if ( nGet >= nCurrGet - 1 )
|
|
{
|
|
--nGetDelta;
|
|
}
|
|
if ( nPut >= nCurrGet - 1 )
|
|
{
|
|
--nPutDelta;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const char *pNext = V_strnchr( pCurr, '\n', nInCount - nCurrGet );
|
|
if ( !pNext )
|
|
{
|
|
outBuf.Put( pCurr, nInCount - nCurrGet );
|
|
break;
|
|
}
|
|
|
|
intp nBytes = (intp)pNext - (intp)pCurr;
|
|
outBuf.Put( pCurr, (int)nBytes );
|
|
outBuf.PutChar( '\r' );
|
|
outBuf.PutChar( '\n' );
|
|
nCurrGet += nBytes + 1;
|
|
if ( nGet >= nCurrGet )
|
|
{
|
|
++nGetDelta;
|
|
}
|
|
if ( nPut >= nCurrGet )
|
|
{
|
|
++nPutDelta;
|
|
}
|
|
}
|
|
}
|
|
|
|
Assert( nPut + nPutDelta <= outBuf.TellMaxPut() );
|
|
|
|
outBuf.SeekGet( SEEK_HEAD, nGet + nGetDelta );
|
|
outBuf.SeekPut( SEEK_HEAD, nPut + nPutDelta );
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Implementation of CUtlInplaceBuffer
|
|
//---------------------------------------------------------------------------
|
|
|
|
CUtlInplaceBuffer::CUtlInplaceBuffer( int growSize /* = 0 */, int initSize /* = 0 */, int nFlags /* = 0 */ ) :
|
|
CUtlBuffer( growSize, initSize, nFlags )
|
|
{
|
|
NULL;
|
|
}
|
|
|
|
bool CUtlInplaceBuffer::InplaceGetLinePtr( char **ppszInBufferPtr, int *pnLineLength )
|
|
{
|
|
Assert( IsText() && !ContainsCRLF() );
|
|
|
|
int nLineLen = PeekLineLength();
|
|
if ( nLineLen <= 1 )
|
|
{
|
|
SeekGet( SEEK_TAIL, 0 );
|
|
return false;
|
|
}
|
|
|
|
-- nLineLen; // because it accounts for putting a terminating null-character
|
|
|
|
char *pszLine = ( char * ) const_cast< void * >( PeekGet() );
|
|
SeekGet( SEEK_CURRENT, nLineLen );
|
|
|
|
// Set the out args
|
|
if ( ppszInBufferPtr )
|
|
*ppszInBufferPtr = pszLine;
|
|
|
|
if ( pnLineLength )
|
|
*pnLineLength = nLineLen;
|
|
|
|
return true;
|
|
}
|
|
|
|
char * CUtlInplaceBuffer::InplaceGetLinePtr( void )
|
|
{
|
|
char *pszLine = NULL;
|
|
int nLineLen = 0;
|
|
|
|
if ( InplaceGetLinePtr( &pszLine, &nLineLen ) )
|
|
{
|
|
Assert( nLineLen >= 1 );
|
|
|
|
switch ( pszLine[ nLineLen - 1 ] )
|
|
{
|
|
case '\n':
|
|
case '\r':
|
|
pszLine[ nLineLen - 1 ] = 0;
|
|
if ( -- nLineLen )
|
|
{
|
|
switch ( pszLine[ nLineLen - 1 ] )
|
|
{
|
|
case '\n':
|
|
case '\r':
|
|
pszLine[ nLineLen - 1 ] = 0;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
Assert( pszLine[ nLineLen ] == 0 );
|
|
break;
|
|
}
|
|
}
|
|
|
|
return pszLine;
|
|
}
|