| /* Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| file Copyright.txt or https://cmake.org/licensing for details. */ |
| #include "cmExprParserHelper.h" |
| |
| #include "cmExprLexer.h" |
| |
| #include <iostream> |
| #include <sstream> |
| #include <stdexcept> |
| #include <utility> |
| |
| int cmExpr_yyparse(yyscan_t yyscanner); |
| // |
| cmExprParserHelper::cmExprParserHelper() |
| { |
| this->FileLine = -1; |
| this->FileName = nullptr; |
| this->Result = 0; |
| } |
| |
| cmExprParserHelper::~cmExprParserHelper() = default; |
| |
| int cmExprParserHelper::ParseString(const char* str, int verb) |
| { |
| if (!str) { |
| return 0; |
| } |
| // printf("Do some parsing: %s\n", str); |
| |
| this->Verbose = verb; |
| this->InputBuffer = str; |
| this->InputBufferPos = 0; |
| this->CurrentLine = 0; |
| |
| this->Result = 0; |
| |
| yyscan_t yyscanner; |
| cmExpr_yylex_init(&yyscanner); |
| cmExpr_yyset_extra(this, yyscanner); |
| |
| try { |
| int res = cmExpr_yyparse(yyscanner); |
| if (res != 0) { |
| std::string e = "cannot parse the expression: \"" + InputBuffer + "\": "; |
| e += ErrorString; |
| e += "."; |
| this->SetError(std::move(e)); |
| } |
| } catch (std::runtime_error const& fail) { |
| std::string e = |
| "cannot evaluate the expression: \"" + InputBuffer + "\": "; |
| e += fail.what(); |
| e += "."; |
| this->SetError(std::move(e)); |
| } catch (std::out_of_range const&) { |
| std::string e = "cannot evaluate the expression: \"" + InputBuffer + |
| "\": a numeric value is out of range."; |
| this->SetError(std::move(e)); |
| } catch (...) { |
| std::string e = "cannot parse the expression: \"" + InputBuffer + "\"."; |
| this->SetError(std::move(e)); |
| } |
| cmExpr_yylex_destroy(yyscanner); |
| if (!this->ErrorString.empty()) { |
| return 0; |
| } |
| |
| if (Verbose) { |
| std::cerr << "Expanding [" << str << "] produced: [" << this->Result << "]" |
| << std::endl; |
| } |
| return 1; |
| } |
| |
| int cmExprParserHelper::LexInput(char* buf, int maxlen) |
| { |
| // std::cout << "JPLexInput "; |
| // std::cout.write(buf, maxlen); |
| // std::cout << std::endl; |
| if (maxlen < 1) { |
| return 0; |
| } |
| if (this->InputBufferPos < this->InputBuffer.size()) { |
| buf[0] = this->InputBuffer[this->InputBufferPos++]; |
| if (buf[0] == '\n') { |
| this->CurrentLine++; |
| } |
| return (1); |
| } |
| buf[0] = '\n'; |
| return (0); |
| } |
| |
| void cmExprParserHelper::Error(const char* str) |
| { |
| unsigned long pos = static_cast<unsigned long>(this->InputBufferPos); |
| std::ostringstream ostr; |
| ostr << str << " (" << pos << ")"; |
| this->ErrorString = ostr.str(); |
| } |
| |
| void cmExprParserHelper::UnexpectedChar(char c) |
| { |
| unsigned long pos = static_cast<unsigned long>(this->InputBufferPos); |
| std::ostringstream ostr; |
| ostr << "Unexpected character in expression at position " << pos << ": " << c |
| << "\n"; |
| this->WarningString += ostr.str(); |
| } |
| |
| void cmExprParserHelper::SetResult(KWIML_INT_int64_t value) |
| { |
| this->Result = value; |
| } |
| |
| void cmExprParserHelper::SetError(std::string errorString) |
| { |
| this->ErrorString = std::move(errorString); |
| } |