102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmExprParserHelper.h"
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#include "cmMakefile.h"
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#include "cmSystemTools.h"
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#include "cmExprLexer.h"
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int cmExpr_yyparse(yyscan_t yyscanner);
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//
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cmExprParserHelper::cmExprParserHelper()
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{
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this->FileLine = -1;
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this->FileName = 0;
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}
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cmExprParserHelper::~cmExprParserHelper()
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{
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this->CleanupParser();
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}
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int cmExprParserHelper::ParseString(const char* str, int verb)
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{
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if (!str) {
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return 0;
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}
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// printf("Do some parsing: %s\n", str);
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this->Verbose = verb;
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this->InputBuffer = str;
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this->InputBufferPos = 0;
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this->CurrentLine = 0;
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this->Result = 0;
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yyscan_t yyscanner;
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cmExpr_yylex_init(&yyscanner);
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cmExpr_yyset_extra(this, yyscanner);
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int res = cmExpr_yyparse(yyscanner);
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cmExpr_yylex_destroy(yyscanner);
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if (res != 0) {
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// str << "CAL_Parser returned: " << res << std::endl;
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// std::cerr << "When parsing: [" << str << "]" << std::endl;
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return 0;
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}
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this->CleanupParser();
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if (Verbose) {
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std::cerr << "Expanding [" << str << "] produced: [" << this->Result << "]"
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<< std::endl;
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}
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return 1;
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}
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void cmExprParserHelper::CleanupParser()
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{
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}
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int cmExprParserHelper::LexInput(char* buf, int maxlen)
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{
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// std::cout << "JPLexInput ";
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// std::cout.write(buf, maxlen);
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// std::cout << std::endl;
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if (maxlen < 1) {
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return 0;
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}
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if (this->InputBufferPos < this->InputBuffer.size()) {
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buf[0] = this->InputBuffer[this->InputBufferPos++];
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if (buf[0] == '\n') {
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this->CurrentLine++;
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}
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return (1);
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} else {
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buf[0] = '\n';
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return (0);
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}
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}
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void cmExprParserHelper::Error(const char* str)
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{
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unsigned long pos = static_cast<unsigned long>(this->InputBufferPos);
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std::ostringstream ostr;
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ostr << str << " (" << pos << ")";
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this->ErrorString = ostr.str();
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}
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void cmExprParserHelper::SetResult(int value)
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{
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this->Result = value;
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}
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