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-rw-r--r--basic/source/comp/scanner.cxx717
1 files changed, 717 insertions, 0 deletions
diff --git a/basic/source/comp/scanner.cxx b/basic/source/comp/scanner.cxx
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+++ b/basic/source/comp/scanner.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <basiccharclass.hxx>
+#include <scanner.hxx>
+#include <sbintern.hxx>
+#include <runtime.hxx>
+
+#include <basic/sberrors.hxx>
+#include <i18nlangtag/lang.h>
+#include <svl/numformat.hxx>
+#include <svl/zforlist.hxx>
+#include <rtl/character.hxx>
+#include <o3tl/string_view.hxx>
+#include <utility>
+
+SbiScanner::SbiScanner(OUString _aBuf, StarBASIC* p)
+ : aBuf(std::move(_aBuf))
+ , nLineIdx(-1)
+ , nSaveLineIdx(-1)
+ , pBasic(p)
+ , eScanType(SbxVARIANT)
+ , nVal(0)
+ , nSavedCol1(0)
+ , nCol(0)
+ , nErrors(0)
+ , nColLock(0)
+ , nBufPos(0)
+ , nLine(0)
+ , nCol1(0)
+ , nCol2(0)
+ , bSymbol(false)
+ , bNumber(false)
+ , bSpaces(false)
+ , bAbort(false)
+ , bHash(true)
+ , bError(false)
+ , bCompatible(false)
+ , bVBASupportOn(false)
+ , bPrevLineExtentsComment(false)
+ , bClosingUnderscore(false)
+ , bLineEndsWithWhitespace(false)
+ , bInStatement(false)
+{
+}
+
+void SbiScanner::LockColumn()
+{
+ if( !nColLock++ )
+ nSavedCol1 = nCol1;
+}
+
+void SbiScanner::UnlockColumn()
+{
+ if( nColLock )
+ nColLock--;
+}
+
+void SbiScanner::GenError( ErrCode code )
+{
+ if( GetSbData()->bBlockCompilerError )
+ {
+ bAbort = true;
+ return;
+ }
+ if( !bError )
+ {
+ bool bRes = true;
+ // report only one error per statement
+ bError = true;
+ if( pBasic )
+ {
+ // in case of EXPECTED or UNEXPECTED it always refers
+ // to the last token, so take the Col1 over
+ sal_Int32 nc = nColLock ? nSavedCol1 : nCol1;
+ if ( code.anyOf(
+ ERRCODE_BASIC_EXPECTED,
+ ERRCODE_BASIC_UNEXPECTED,
+ ERRCODE_BASIC_SYMBOL_EXPECTED,
+ ERRCODE_BASIC_LABEL_EXPECTED) )
+ {
+ nc = nCol1;
+ if( nc > nCol2 ) nCol2 = nc;
+ }
+ bRes = pBasic->CError( code, aError, nLine, nc, nCol2 );
+ }
+ bAbort = bAbort || !bRes || ( code == ERRCODE_BASIC_NO_MEMORY || code == ERRCODE_BASIC_PROG_TOO_LARGE );
+ }
+ nErrors++;
+}
+
+
+// used by SbiTokenizer::MayBeLabel() to detect a label
+bool SbiScanner::DoesColonFollow()
+{
+ if(nCol < aLine.getLength() && aLine[nCol] == ':')
+ {
+ ++nLineIdx; ++nCol;
+ return true;
+ }
+ else
+ return false;
+}
+
+// test for legal suffix
+static SbxDataType GetSuffixType( sal_Unicode c )
+{
+ switch (c)
+ {
+ case '%':
+ return SbxINTEGER;
+ case '&':
+ return SbxLONG;
+ case '!':
+ return SbxSINGLE;
+ case '#':
+ return SbxDOUBLE;
+ case '@':
+ return SbxCURRENCY;
+ case '$':
+ return SbxSTRING;
+ default:
+ return SbxVARIANT;
+ }
+}
+
+// reading the next symbol into the variables aSym, nVal and eType
+// return value is sal_False at EOF or errors
+#define BUF_SIZE 80
+
+void SbiScanner::scanAlphanumeric()
+{
+ sal_Int32 n = nCol;
+ while(nCol < aLine.getLength() && (BasicCharClass::isAlphaNumeric(aLine[nCol], bCompatible) || aLine[nCol] == '_'))
+ {
+ ++nLineIdx;
+ ++nCol;
+ }
+ aSym = aLine.copy(n, nCol - n);
+}
+
+void SbiScanner::scanGoto()
+{
+ sal_Int32 n = nCol;
+ while(n < aLine.getLength() && BasicCharClass::isWhitespace(aLine[n]))
+ ++n;
+
+ if(n + 1 < aLine.getLength())
+ {
+ std::u16string_view aTemp = aLine.subView(n, 2);
+ if(o3tl::equalsIgnoreAsciiCase(aTemp, u"to"))
+ {
+ aSym = "goto";
+ nLineIdx += n + 2 - nCol;
+ nCol = n + 2;
+ }
+ }
+}
+
+bool SbiScanner::readLine()
+{
+ if(nBufPos >= aBuf.getLength())
+ return false;
+
+ sal_Int32 n = nBufPos;
+ sal_Int32 nLen = aBuf.getLength();
+
+ while(n < nLen && aBuf[n] != '\r' && aBuf[n] != '\n')
+ ++n;
+
+ // Trim trailing whitespace
+ sal_Int32 nEnd = n;
+ while(nBufPos < nEnd && BasicCharClass::isWhitespace(aBuf[nEnd - 1]))
+ --nEnd;
+
+ // tdf#149402 - check if line ends with a whitespace
+ bLineEndsWithWhitespace = (n > nEnd);
+ aLine = aBuf.copy(nBufPos, nEnd - nBufPos);
+
+ // Fast-forward past the line ending
+ if(n + 1 < nLen && aBuf[n] == '\r' && aBuf[n + 1] == '\n')
+ n += 2;
+ else if(n < nLen)
+ ++n;
+
+ nBufPos = n;
+ nLineIdx = 0;
+
+ ++nLine;
+ nCol = nCol1 = nCol2 = 0;
+ nColLock = 0;
+
+ return true;
+}
+
+bool SbiScanner::NextSym()
+{
+ // memorize for the EOLN-case
+ sal_Int32 nOldLine = nLine;
+ sal_Int32 nOldCol1 = nCol1;
+ sal_Int32 nOldCol2 = nCol2;
+ sal_Unicode buf[ BUF_SIZE ], *p = buf;
+
+ eScanType = SbxVARIANT;
+ aSym.clear();
+ bHash = bSymbol = bNumber = bSpaces = false;
+ bool bCompilerDirective = false;
+
+ // read in line?
+ if (nLineIdx == -1)
+ {
+ if(!readLine())
+ return false;
+
+ nOldLine = nLine;
+ nOldCol1 = nOldCol2 = 0;
+ }
+
+ const sal_Int32 nLineIdxScanStart = nLineIdx;
+
+ if(nCol < aLine.getLength() && BasicCharClass::isWhitespace(aLine[nCol]))
+ {
+ bSpaces = true;
+ while(nCol < aLine.getLength() && BasicCharClass::isWhitespace(aLine[nCol]))
+ {
+ ++nLineIdx;
+ ++nCol;
+ }
+ }
+
+ nCol1 = nCol;
+
+ // only blank line?
+ if(nCol >= aLine.getLength())
+ goto eoln;
+
+ if( bPrevLineExtentsComment )
+ goto PrevLineCommentLbl;
+
+ if(nCol < aLine.getLength() && aLine[nCol] == '#')
+ {
+ sal_Int32 nLineTempIdx = nLineIdx;
+ do
+ {
+ nLineTempIdx++;
+ } while (nLineTempIdx < aLine.getLength() && !BasicCharClass::isWhitespace(aLine[nLineTempIdx])
+ && aLine[nLineTempIdx] != '#' && aLine[nLineTempIdx] != ',');
+ // leave it if it is a date literal - it will be handled later
+ if (nLineTempIdx >= aLine.getLength() || aLine[nLineTempIdx] != '#')
+ {
+ ++nLineIdx;
+ ++nCol;
+ //ignore compiler directives (# is first non-space character)
+ if (nOldCol2 == 0)
+ bCompilerDirective = true;
+ else
+ bHash = true;
+ }
+ }
+
+ // copy character if symbol
+ if(nCol < aLine.getLength() && (BasicCharClass::isAlpha(aLine[nCol], bCompatible) || aLine[nCol] == '_'))
+ {
+ // if there's nothing behind '_' , it's the end of a line!
+ if(nCol + 1 == aLine.getLength() && aLine[nCol] == '_')
+ {
+ // Note that nCol is not incremented here...
+ ++nLineIdx;
+ goto eoln;
+ }
+
+ bSymbol = true;
+
+ scanAlphanumeric();
+
+ // Special handling for "go to"
+ if(nCol < aLine.getLength() && bCompatible && aSym.equalsIgnoreAsciiCase("go"))
+ scanGoto();
+
+ // tdf#125637 - check for closing underscore
+ if (nCol == aLine.getLength() && aLine[nCol - 1] == '_')
+ {
+ bClosingUnderscore = true;
+ }
+ // type recognition?
+ // don't test the exclamation mark
+ // if there's a symbol behind it
+ else if((nCol >= aLine.getLength() || aLine[nCol] != '!') ||
+ (nCol + 1 >= aLine.getLength() || !BasicCharClass::isAlpha(aLine[nCol + 1], bCompatible)))
+ {
+ if(nCol < aLine.getLength())
+ {
+ SbxDataType t(GetSuffixType(aLine[nCol]));
+ if( t != SbxVARIANT )
+ {
+ eScanType = t;
+ ++nLineIdx;
+ ++nCol;
+ }
+ }
+ }
+ }
+
+ // read in and convert if number
+ else if((nCol < aLine.getLength() && rtl::isAsciiDigit(aLine[nCol])) ||
+ (nCol + 1 < aLine.getLength() && aLine[nCol] == '.' && rtl::isAsciiDigit(aLine[nCol + 1])))
+ {
+ short exp = 0;
+ short dec = 0;
+ eScanType = SbxDOUBLE;
+ bool bScanError = false;
+ bool bBufOverflow = false;
+ // All this because of 'D' or 'd' floating point type, sigh...
+ while(!bScanError && nCol < aLine.getLength() && strchr("0123456789.DEde", aLine[nCol]))
+ {
+ // from 4.1.1996: buffer full? -> go on scanning empty
+ if( (p-buf) == (BUF_SIZE-1) )
+ {
+ bBufOverflow = true;
+ ++nLineIdx;
+ ++nCol;
+ continue;
+ }
+ // point or exponent?
+ if(aLine[nCol] == '.')
+ {
+ if( ++dec > 1 )
+ bScanError = true;
+ else
+ *p++ = '.';
+ }
+ else if(strchr("DdEe", aLine[nCol]))
+ {
+ if (++exp > 1)
+ bScanError = true;
+ else
+ {
+ *p++ = 'E';
+ if (nCol + 1 < aLine.getLength() && (aLine[nCol+1] == '+' || aLine[nCol+1] == '-'))
+ {
+ ++nLineIdx;
+ ++nCol;
+ if( (p-buf) == (BUF_SIZE-1) )
+ {
+ bBufOverflow = true;
+ continue;
+ }
+ *p++ = aLine[nCol];
+ }
+ }
+ }
+ else
+ {
+ *p++ = aLine[nCol];
+ }
+ ++nLineIdx;
+ ++nCol;
+ }
+ *p = 0;
+ aSym = p; bNumber = true;
+
+ // For bad characters, scan and parse errors generate only one error.
+ ErrCode nError = ERRCODE_NONE;
+ if (bScanError)
+ {
+ --nLineIdx;
+ --nCol;
+ aError = OUString( aLine[nCol]);
+ nError = ERRCODE_BASIC_BAD_CHAR_IN_NUMBER;
+ }
+
+ rtl_math_ConversionStatus eStatus = rtl_math_ConversionStatus_Ok;
+ const sal_Unicode* pParseEnd = buf;
+ nVal = rtl_math_uStringToDouble( buf, buf+(p-buf), '.', ',', &eStatus, &pParseEnd );
+ if (pParseEnd != buf+(p-buf))
+ {
+ // e.g. "12e" or "12e+", or with bScanError "12d"+"E".
+ sal_Int32 nChars = buf+(p-buf) - pParseEnd;
+ nLineIdx -= nChars;
+ nCol -= nChars;
+ // For bScanError, nLineIdx and nCol were already decremented, just
+ // add that character to the parse end.
+ if (bScanError)
+ ++nChars;
+ // Copy error position from original string, not the buffer
+ // replacement where "12dE" => "12EE".
+ aError = aLine.copy( nCol, nChars);
+ nError = ERRCODE_BASIC_BAD_CHAR_IN_NUMBER;
+ }
+ else if (eStatus != rtl_math_ConversionStatus_Ok)
+ {
+ // Keep the scan error and character at position, if any.
+ if (!nError)
+ nError = ERRCODE_BASIC_MATH_OVERFLOW;
+ }
+
+ if (nError)
+ GenError( nError );
+
+ if( !dec && !exp )
+ {
+ if( nVal >= SbxMININT && nVal <= SbxMAXINT )
+ eScanType = SbxINTEGER;
+ else if( nVal >= SbxMINLNG && nVal <= SbxMAXLNG )
+ eScanType = SbxLONG;
+ }
+
+ if( bBufOverflow )
+ GenError( ERRCODE_BASIC_MATH_OVERFLOW );
+
+ // type recognition?
+ if( nCol < aLine.getLength() )
+ {
+ SbxDataType t(GetSuffixType(aLine[nCol]));
+ if( t != SbxVARIANT )
+ {
+ eScanType = t;
+ ++nLineIdx;
+ ++nCol;
+ }
+ // tdf#130476 - don't allow String trailing data type character with numbers
+ if ( t == SbxSTRING )
+ {
+ GenError( ERRCODE_BASIC_SYNTAX );
+ }
+ }
+ }
+
+ // Hex/octal number? Read in and convert:
+ else if(aLine.getLength() - nCol > 1 && aLine[nCol] == '&')
+ {
+ ++nLineIdx; ++nCol;
+ sal_Unicode base = 16;
+ sal_Unicode xch = aLine[nCol];
+ ++nLineIdx; ++nCol;
+ switch( rtl::toAsciiUpperCase( xch ) )
+ {
+ case 'O':
+ base = 8;
+ break;
+ case 'H':
+ break;
+ default :
+ // treated as an operator
+ --nLineIdx; --nCol; nCol1 = nCol-1;
+ aSym = "&";
+ return true;
+ }
+ bNumber = true;
+ // Hex literals are signed Integers ( as defined by basic
+ // e.g. -2,147,483,648 through 2,147,483,647 (signed)
+ sal_uInt64 lu = 0;
+ bool bOverflow = false;
+ while(nCol < aLine.getLength() && BasicCharClass::isAlphaNumeric(aLine[nCol], false))
+ {
+ sal_Unicode ch = rtl::toAsciiUpperCase(aLine[nCol]);
+ ++nLineIdx; ++nCol;
+ if( ((base == 16 ) && rtl::isAsciiHexDigit( ch ) ) ||
+ ((base == 8) && rtl::isAsciiOctalDigit( ch )))
+ {
+ int i = ch - '0';
+ if( i > 9 ) i -= 7;
+ lu = ( lu * base ) + i;
+ if( lu > SAL_MAX_UINT32 )
+ {
+ bOverflow = true;
+ }
+ }
+ else
+ {
+ aError = OUString(ch);
+ GenError( ERRCODE_BASIC_BAD_CHAR_IN_NUMBER );
+ }
+ }
+
+ // tdf#130476 - take into account trailing data type characters
+ if( nCol < aLine.getLength() )
+ {
+ SbxDataType t(GetSuffixType(aLine[nCol]));
+ if( t != SbxVARIANT )
+ {
+ eScanType = t;
+ ++nLineIdx;
+ ++nCol;
+ }
+ // tdf#130476 - don't allow String trailing data type character with numbers
+ if ( t == SbxSTRING )
+ {
+ GenError( ERRCODE_BASIC_SYNTAX );
+ }
+ }
+
+ // tdf#130476 - take into account trailing data type characters
+ switch ( eScanType )
+ {
+ case SbxINTEGER:
+ nVal = static_cast<double>( static_cast<sal_Int16>(lu) );
+ if ( lu > SbxMAXUINT )
+ {
+ bOverflow = true;
+ }
+ break;
+ case SbxLONG: nVal = static_cast<double>( static_cast<sal_Int32>(lu) ); break;
+ case SbxVARIANT:
+ {
+ // tdf#62326 - If the value of the hex string without explicit type character lies within
+ // the range of 0x8000 (SbxMAXINT + 1) and 0xFFFF (SbxMAXUINT) inclusive, cast the value
+ // to 16 bit in order to get signed integers, e.g., SbxMININT through SbxMAXINT
+ sal_Int32 ls = (lu > SbxMAXINT && lu <= SbxMAXUINT) ? static_cast<sal_Int16>(lu) : static_cast<sal_Int32>(lu);
+ eScanType = ( ls >= SbxMININT && ls <= SbxMAXINT ) ? SbxINTEGER : SbxLONG;
+ nVal = static_cast<double>(ls);
+ break;
+ }
+ default:
+ nVal = static_cast<double>(lu);
+ break;
+ }
+ if( bOverflow )
+ GenError( ERRCODE_BASIC_MATH_OVERFLOW );
+ }
+
+ // Strings:
+ else if (nLineIdx < aLine.getLength() && (aLine[nLineIdx] == '"' || aLine[nLineIdx] == '['))
+ {
+ sal_Unicode cSep = aLine[nLineIdx];
+ if( cSep == '[' )
+ {
+ bSymbol = true;
+ cSep = ']';
+ }
+ sal_Int32 n = nCol + 1;
+ while (nLineIdx < aLine.getLength())
+ {
+ do
+ {
+ nLineIdx++;
+ nCol++;
+ }
+ while (nLineIdx < aLine.getLength() && (aLine[nLineIdx] != cSep));
+ if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == cSep)
+ {
+ nLineIdx++; nCol++;
+ if (nLineIdx >= aLine.getLength() || aLine[nLineIdx] != cSep || cSep == ']')
+ {
+ // If VBA Interop then doesn't eat the [] chars
+ if ( cSep == ']' && bVBASupportOn )
+ aSym = aLine.copy( n - 1, nCol - n + 1);
+ else
+ aSym = aLine.copy( n, nCol - n - 1 );
+ // get out duplicate string delimiters
+ OUStringBuffer aSymBuf(aSym.getLength());
+ for ( sal_Int32 i = 0, len = aSym.getLength(); i < len; ++i )
+ {
+ aSymBuf.append( aSym[i] );
+ if ( aSym[i] == cSep && ( i+1 < len ) && aSym[i+1] == cSep )
+ ++i;
+ }
+ aSym = aSymBuf.makeStringAndClear();
+ if( cSep != ']' )
+ eScanType = SbxSTRING;
+ break;
+ }
+ }
+ else
+ {
+ aError = OUString(cSep);
+ GenError( ERRCODE_BASIC_EXPECTED );
+ }
+ }
+ }
+
+ // Date:
+ else if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == '#')
+ {
+ sal_Int32 n = nCol + 1;
+ do
+ {
+ nLineIdx++;
+ nCol++;
+ }
+ while (nLineIdx < aLine.getLength() && (aLine[nLineIdx] != '#'));
+ if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == '#')
+ {
+ nLineIdx++; nCol++;
+ aSym = aLine.copy( n, nCol - n - 1 );
+
+ // parse date literal
+ std::shared_ptr<SvNumberFormatter> pFormatter;
+ if (GetSbData()->pInst)
+ {
+ pFormatter = GetSbData()->pInst->GetNumberFormatter();
+ }
+ else
+ {
+ sal_uInt32 nDummy;
+ pFormatter = SbiInstance::PrepareNumberFormatter( nDummy, nDummy, nDummy );
+ }
+ sal_uInt32 nIndex = pFormatter->GetStandardIndex( LANGUAGE_ENGLISH_US);
+ bool bSuccess = pFormatter->IsNumberFormat(aSym, nIndex, nVal);
+ if( bSuccess )
+ {
+ SvNumFormatType nType_ = pFormatter->GetType(nIndex);
+ if( !(nType_ & SvNumFormatType::DATE) )
+ bSuccess = false;
+ }
+
+ if (!bSuccess)
+ GenError( ERRCODE_BASIC_CONVERSION );
+
+ bNumber = true;
+ eScanType = SbxDOUBLE;
+ }
+ else
+ {
+ aError = OUString('#');
+ GenError( ERRCODE_BASIC_EXPECTED );
+ }
+ }
+ // invalid characters:
+ else if (nLineIdx < aLine.getLength() && aLine[nLineIdx] >= 0x7F)
+ {
+ GenError( ERRCODE_BASIC_SYNTAX ); nLineIdx++; nCol++;
+ }
+ // other groups:
+ else
+ {
+ sal_Int32 n = 1;
+ auto nChar = nLineIdx < aLine.getLength() ? aLine[nLineIdx] : 0;
+ ++nLineIdx;
+ if (nLineIdx < aLine.getLength())
+ {
+ switch (nChar)
+ {
+ case '<': if( aLine[nLineIdx] == '>' || aLine[nLineIdx] == '=' ) n = 2; break;
+ case '>': if( aLine[nLineIdx] == '=' ) n = 2; break;
+ case ':': if( aLine[nLineIdx] == '=' ) n = 2; break;
+ }
+ }
+ aSym = aLine.copy(nCol, std::min(n, aLine.getLength() - nCol));
+ nLineIdx += n-1; nCol = nCol + n;
+ }
+
+ nCol2 = nCol-1;
+
+PrevLineCommentLbl:
+
+ if( bPrevLineExtentsComment || (eScanType != SbxSTRING &&
+ ( bCompilerDirective ||
+ aSym.startsWith("'") ||
+ aSym.equalsIgnoreAsciiCase( "REM" ) ) ) )
+ {
+ bPrevLineExtentsComment = false;
+ aSym = "REM";
+ sal_Int32 nLen = aLine.getLength() - nLineIdx;
+ // tdf#149402 - don't extend comment if line ends in a whitespace (asicCharClass::isWhitespace)
+ if (bCompatible && !bLineEndsWithWhitespace && aLine[nLineIdx + nLen - 1] == '_'
+ && aLine[nLineIdx + nLen - 2] == ' ')
+ bPrevLineExtentsComment = true;
+ nCol2 = nCol2 + nLen;
+ nLineIdx = -1;
+ }
+
+ if (nLineIdx == nLineIdxScanStart)
+ {
+ GenError( ERRCODE_BASIC_SYMBOL_EXPECTED );
+ return false;
+ }
+
+ return true;
+
+
+eoln:
+ if (nCol && aLine[--nLineIdx] == '_' && !bClosingUnderscore)
+ {
+ nLineIdx = -1;
+ bool bRes = NextSym();
+ if( aSym.startsWith(".") )
+ {
+ // object _
+ // .Method
+ // ^^^ <- spaces is legal in MSO VBA
+ bSpaces = false;
+ }
+ return bRes;
+ }
+ else
+ {
+ nLineIdx = -1;
+ nLine = nOldLine;
+ nCol1 = nOldCol1;
+ nCol2 = nOldCol2;
+ aSym = "\n";
+ nColLock = 0;
+ bClosingUnderscore = false;
+ // tdf#149157 - break multiline continuation in a comment after a new line
+ bPrevLineExtentsComment = false;
+ return true;
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 06:22:00 +0000