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367 lines
11 KiB
C++
367 lines
11 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: A simple class for performing safe and in-expression sprintf-style
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// string formatting
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef FMTSTR_H
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#define FMTSTR_H
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#include <stdarg.h>
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#include <stdio.h>
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#include "tier0/platform.h"
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#include "tier0/dbg.h"
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#include "tier1/strtools.h"
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#if defined( _WIN32 )
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#pragma once
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#endif
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#if defined(POSIX)
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#pragma GCC visibility push(hidden)
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#endif
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//=============================================================================
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// using macro to be compatable with GCC
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#define FmtStrVSNPrintf( szBuf, nBufSize, bQuietTruncation, ppszFormat, nPrevLen, lastArg ) \
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do \
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{ \
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int result; \
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va_list arg_ptr; \
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bool bTruncated = false; \
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static int scAsserted = 0; \
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\
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va_start(arg_ptr, lastArg); \
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result = V_vsnprintfRet( (szBuf), (nBufSize)-1, (*(ppszFormat)), arg_ptr, &bTruncated ); \
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va_end(arg_ptr); \
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\
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(szBuf)[(nBufSize)-1] = 0; \
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if ( bTruncated && !(bQuietTruncation) && scAsserted < 5 ) \
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{ \
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Warning( "FmtStrVSNPrintf truncated to %d without QUIET_TRUNCATION specified!\n", ( int )( nBufSize ) ); \
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AssertMsg( 0, "FmtStrVSNPrintf truncated without QUIET_TRUNCATION specified!\n" ); \
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scAsserted++; \
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} \
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m_nLength = nPrevLen + result; \
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} \
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while (0)
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// using macro to be compatable with GCC
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#define FmtStrVSNPrintfNoLengthFixup( szBuf, nBufSize, bQuietTruncation, ppszFormat, nPrevLen, lastArg ) \
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do \
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{ \
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int result; \
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va_list arg_ptr; \
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bool bTruncated = false; \
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static int scAsserted = 0; \
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\
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va_start(arg_ptr, lastArg); \
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result = V_vsnprintfRet( (szBuf), (nBufSize)-1, (*(ppszFormat)), arg_ptr, &bTruncated ); \
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va_end(arg_ptr); \
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\
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(szBuf)[(nBufSize)-1] = 0; \
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if ( bTruncated && !(bQuietTruncation) && scAsserted < 5 ) \
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{ \
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Warning( "FmtStrVSNPrintf truncated to %d without QUIET_TRUNCATION specified!\n", ( int )( nBufSize ) ); \
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AssertMsg( 0, "FmtStrVSNPrintf truncated without QUIET_TRUNCATION specified!\n" ); \
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scAsserted++; \
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} \
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} \
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while (0)
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//-----------------------------------------------------------------------------
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//
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// Purpose: String formatter with specified size
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//
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template <int SIZE_BUF, bool QUIET_TRUNCATION = false >
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class CFmtStrN
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{
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public:
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CFmtStrN()
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{
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InitQuietTruncation();
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m_szBuf[0] = 0;
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m_nLength = 0;
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}
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// Standard C formatting
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CFmtStrN(PRINTF_FORMAT_STRING const char *pszFormat, ...) FMTFUNCTION( 2, 3 )
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{
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InitQuietTruncation();
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FmtStrVSNPrintf( m_szBuf, SIZE_BUF, m_bQuietTruncation, &pszFormat, 0, pszFormat );
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}
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// Use this for pass-through formatting
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CFmtStrN(const char ** ppszFormat, ...)
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{
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InitQuietTruncation();
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FmtStrVSNPrintf( m_szBuf, SIZE_BUF, m_bQuietTruncation, ppszFormat, 0, ppszFormat );
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}
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// Explicit reformat
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const char *sprintf(PRINTF_FORMAT_STRING const char *pszFormat, ...) FMTFUNCTION( 2, 3 )
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{
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InitQuietTruncation();
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FmtStrVSNPrintf(m_szBuf, SIZE_BUF, m_bQuietTruncation, &pszFormat, 0, pszFormat );
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return m_szBuf;
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}
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// Use this for va_list formatting
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const char *sprintf_argv(const char *pszFormat, va_list arg_ptr)
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{
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int result;
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bool bTruncated = false;
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static int s_nWarned = 0;
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InitQuietTruncation();
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result = V_vsnprintfRet( m_szBuf, SIZE_BUF - 1, pszFormat, arg_ptr, &bTruncated );
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m_szBuf[SIZE_BUF - 1] = 0;
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if ( bTruncated && !m_bQuietTruncation && ( s_nWarned < 5 ) )
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{
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Warning( "CFmtStr truncated to %d without QUIET_TRUNCATION specified!\n", SIZE_BUF );
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AssertMsg( 0, "CFmtStr truncated without QUIET_TRUNCATION specified!\n" );
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s_nWarned++;
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}
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m_nLength = V_strlen( m_szBuf );
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return m_szBuf;
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}
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// Use this for pass-through formatting
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void VSprintf(const char **ppszFormat, ...)
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{
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InitQuietTruncation();
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FmtStrVSNPrintf( m_szBuf, SIZE_BUF, m_bQuietTruncation, ppszFormat, 0, ppszFormat );
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}
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// Compatible API with CUtlString for converting to const char*
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const char *Get( ) const { return m_szBuf; }
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const char *String( ) const { return m_szBuf; }
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// Use for access
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operator const char *() const { return m_szBuf; }
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char *Access() { return m_szBuf; }
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// Access template argument
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static inline int GetMaxLength() { return SIZE_BUF-1; }
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CFmtStrN<SIZE_BUF,QUIET_TRUNCATION> & operator=( const char *pchValue )
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{
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V_strncpy( m_szBuf, pchValue, SIZE_BUF );
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m_nLength = V_strlen( m_szBuf );
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return *this;
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}
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CFmtStrN<SIZE_BUF,QUIET_TRUNCATION> & operator+=( const char *pchValue )
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{
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Append( pchValue );
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return *this;
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}
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int Length() const { return m_nLength; }
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void SetLength( int nLength )
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{
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m_nLength = Min( nLength, SIZE_BUF - 1 );
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m_szBuf[m_nLength] = '\0';
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}
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void Clear()
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{
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m_szBuf[0] = 0;
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m_nLength = 0;
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}
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void AppendFormat( PRINTF_FORMAT_STRING const char *pchFormat, ... ) FMTFUNCTION( 2, 3 )
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{
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char *pchEnd = m_szBuf + m_nLength;
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FmtStrVSNPrintf( pchEnd, SIZE_BUF - m_nLength, m_bQuietTruncation, &pchFormat, m_nLength, pchFormat );
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}
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void AppendFormatV( const char *pchFormat, va_list args );
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void Append( const char *pchValue )
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{
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// This function is close to the metal to cut down on the CPU cost
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// of the previous incantation of Append which was implemented as
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// AppendFormat( "%s", pchValue ). This implementation, though not
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// as easy to read, instead does a strcpy from the existing end
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// point of the CFmtStrN. This brings something like a 10-20x speedup
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// in my rudimentary tests. It isn't using V_strncpy because that
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// function doesn't return the number of characters copied, which
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// we need to adjust m_nLength. Doing the V_strncpy with a V_strlen
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// afterwards took twice as long as this implementations in tests,
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// so V_strncpy's implementation was used to write this method.
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char *pDest = m_szBuf + m_nLength;
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const int maxLen = SIZE_BUF - m_nLength;
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char *pLast = pDest + maxLen - 1;
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while ( (pDest < pLast) && (*pchValue != 0) )
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{
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*pDest = *pchValue;
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++pDest; ++pchValue;
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}
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*pDest = 0;
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m_nLength = pDest - m_szBuf;
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}
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//optimized version of append for just adding a single character
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void Append( char ch )
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{
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if( m_nLength < SIZE_BUF - 1 )
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{
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m_szBuf[ m_nLength ] = ch;
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m_nLength++;
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m_szBuf[ m_nLength ] = '\0';
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}
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}
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void AppendIndent( uint32 unCount, char chIndent = '\t' );
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void SetQuietTruncation( bool bQuiet ) { m_bQuietTruncation = bQuiet; }
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protected:
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virtual void InitQuietTruncation()
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{
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m_bQuietTruncation = QUIET_TRUNCATION;
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}
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bool m_bQuietTruncation;
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private:
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char m_szBuf[SIZE_BUF];
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int m_nLength;
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};
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// Version which will not assert if strings are truncated
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template < int SIZE_BUF >
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class CFmtStrQuietTruncationN : public CFmtStrN<SIZE_BUF, true >
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{
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};
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template< int SIZE_BUF, bool QUIET_TRUNCATION >
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void CFmtStrN< SIZE_BUF, QUIET_TRUNCATION >::AppendIndent( uint32 unCount, char chIndent )
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{
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Assert( Length() + unCount < SIZE_BUF );
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if( Length() + unCount >= SIZE_BUF )
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unCount = SIZE_BUF - (1+Length());
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for ( uint32 x = 0; x < unCount; x++ )
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{
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m_szBuf[ m_nLength++ ] = chIndent;
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}
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m_szBuf[ m_nLength ] = '\0';
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}
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template< int SIZE_BUF, bool QUIET_TRUNCATION >
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void CFmtStrN< SIZE_BUF, QUIET_TRUNCATION >::AppendFormatV( const char *pchFormat, va_list args )
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{
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int cubPrinted = V_vsnprintf( m_szBuf+Length(), SIZE_BUF - Length(), pchFormat, args );
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m_nLength += cubPrinted;
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}
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#if defined(POSIX)
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#pragma GCC visibility pop
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#endif
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//-----------------------------------------------------------------------------
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//
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// Purpose: Default-sized string formatter
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//
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#define FMTSTR_STD_LEN 256
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typedef CFmtStrN<FMTSTR_STD_LEN> CFmtStr;
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typedef CFmtStrQuietTruncationN<FMTSTR_STD_LEN> CFmtStrQuietTruncation;
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typedef CFmtStrN<1024> CFmtStr1024;
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typedef CFmtStrN<8192> CFmtStrMax;
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//-----------------------------------------------------------------------------
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// Purpose: Fast-path number-to-string helper (with optional quoting)
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// Derived off of the Steam CNumStr but with a few tweaks, such as
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// trimming off the in-our-cases-unnecessary strlen calls (by not
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// storing the length in the class).
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//-----------------------------------------------------------------------------
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class CNumStr
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{
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public:
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CNumStr() { m_szBuf[0] = 0; }
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explicit CNumStr( bool b ) { SetBool( b ); }
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explicit CNumStr( int8 n8 ) { SetInt8( n8 ); }
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explicit CNumStr( uint8 un8 ) { SetUint8( un8 ); }
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explicit CNumStr( int16 n16 ) { SetInt16( n16 ); }
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explicit CNumStr( uint16 un16 ) { SetUint16( un16 ); }
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explicit CNumStr( int32 n32 ) { SetInt32( n32 ); }
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explicit CNumStr( uint32 un32 ) { SetUint32( un32 ); }
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explicit CNumStr( int64 n64 ) { SetInt64( n64 ); }
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explicit CNumStr( uint64 un64 ) { SetUint64( un64 ); }
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#if defined(COMPILER_GCC) && defined(PLATFORM_64BITS)
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explicit CNumStr( lint64 n64 ) { SetInt64( (int64)n64 ); }
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explicit CNumStr( ulint64 un64 ) { SetUint64( (uint64)un64 ); }
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#endif
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explicit CNumStr( double f ) { SetDouble( f ); }
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explicit CNumStr( float f ) { SetFloat( f ); }
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inline void SetBool( bool b ) { Q_memcpy( m_szBuf, b ? "1" : "0", 2 ); }
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#ifdef _WIN32
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inline void SetInt8( int8 n8 ) { _itoa( (int32)n8, m_szBuf, 10 ); }
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inline void SetUint8( uint8 un8 ) { _itoa( (int32)un8, m_szBuf, 10 ); }
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inline void SetInt16( int16 n16 ) { _itoa( (int32)n16, m_szBuf, 10 ); }
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inline void SetUint16( uint16 un16 ) { _itoa( (int32)un16, m_szBuf, 10 ); }
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inline void SetInt32( int32 n32 ) { _itoa( n32, m_szBuf, 10 ); }
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inline void SetUint32( uint32 un32 ) { _i64toa( (int64)un32, m_szBuf, 10 ); }
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inline void SetInt64( int64 n64 ) { _i64toa( n64, m_szBuf, 10 ); }
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inline void SetUint64( uint64 un64 ) { _ui64toa( un64, m_szBuf, 10 ); }
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#else
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inline void SetInt8( int8 n8 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)n8 ); }
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inline void SetUint8( uint8 un8 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)un8 ); }
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inline void SetInt16( int16 n16 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)n16 ); }
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inline void SetUint16( uint16 un16 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", (int32)un16 ); }
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inline void SetInt32( int32 n32 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%d", n32 ); }
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inline void SetUint32( uint32 un32 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%u", un32 ); }
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inline void SetInt64( int64 n64 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%lld", n64 ); }
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inline void SetUint64( uint64 un64 ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%llu", un64 ); }
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#endif
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inline void SetDouble( double f ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%.18g", f ); }
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inline void SetFloat( float f ) { Q_snprintf( m_szBuf, sizeof(m_szBuf), "%.18g", f ); }
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inline void SetHexUint64( uint64 un64 ) { Q_binarytohex( (byte *)&un64, sizeof( un64 ), m_szBuf, sizeof( m_szBuf ) ); }
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operator const char *() const { return m_szBuf; }
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const char* String() const { return m_szBuf; }
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void AddQuotes()
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{
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Assert( m_szBuf[0] != '"' );
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const int nLength = Q_strlen( m_szBuf );
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Q_memmove( m_szBuf + 1, m_szBuf, nLength );
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m_szBuf[0] = '"';
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m_szBuf[nLength + 1] = '"';
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m_szBuf[nLength + 2] = 0;
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}
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protected:
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char m_szBuf[28]; // long enough to hold 18 digits of precision, a decimal, a - sign, e+### suffix, and quotes
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};
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//=============================================================================
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bool BGetLocalFormattedDateAndTime( time_t timeVal, char *pchDate, int cubDate, char *pchTime, int cubTime );
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bool BGetLocalFormattedDate( time_t timeVal, char *pchDate, int cubDate );
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bool BGetLocalFormattedTime( time_t timeVal, char *pchTime, int cubTime );
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#endif // FMTSTR_H
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