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/* 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 <iostream>
#include <sstream>
#include <stdexcept>
#include <utility>
#include "cmExprLexer.h"
#include "cmStringAlgorithms.h"
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 =
cmStrCat("cannot parse the expression: \"", this->InputBuffer,
"\": ", this->ErrorString, '.');
this->SetError(std::move(e));
}
} catch (std::runtime_error const& fail) {
std::string e = cmStrCat("cannot evaluate the expression: \"",
this->InputBuffer, "\": ", fail.what(), '.');
this->SetError(std::move(e));
} catch (std::out_of_range const&) {
std::string e = "cannot evaluate the expression: \"" + this->InputBuffer +
"\": a numeric value is out of range.";
this->SetError(std::move(e));
} catch (...) {
std::string e =
"cannot parse the expression: \"" + this->InputBuffer + "\".";
this->SetError(std::move(e));
}
cmExpr_yylex_destroy(yyscanner);
if (!this->ErrorString.empty()) {
return 0;
}
if (this->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);
}
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