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Extract include directive matcher code into separated methods to improve readability

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This commit is contained in:
Jan 2021-02-10 15:29:54 +01:00
parent d876bc5e25
commit f91c7f6afc
2 changed files with 36 additions and 24 deletions
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51
src/ZoneCodeGeneratorNew/Parsing/Impl/IncludingStreamProxy.cpp
View File

@ -9,14 +9,12 @@ IncludingStreamProxy::IncludingStreamProxy(IParserLineStream* stream)
{
}
bool IncludingStreamProxy::MatchIncludeDirective(const ParserLine& line) const
bool IncludingStreamProxy::FindIncludeDirective(const ParserLine& line, unsigned& includeDirectivePosition)
{
unsigned includeDirectivePos = 0;
auto hasIncludeDirective = false;
for (; includeDirectivePos < line.m_line.size() - INCLUDE_DIRECTIVE_MINIMUM_TOTAL_LENGTH; includeDirectivePos++)
includeDirectivePosition = 0;
for (; includeDirectivePosition < line.m_line.size() - INCLUDE_DIRECTIVE_MINIMUM_TOTAL_LENGTH; includeDirectivePosition++)
{
const auto c = line.m_line[includeDirectivePos];
const auto c = line.m_line[includeDirectivePosition];
if (isspace(c))
continue;
@ -24,19 +22,20 @@ bool IncludingStreamProxy::MatchIncludeDirective(const ParserLine& line) const
if (c != '#')
return false;
if (line.m_line.compare(includeDirectivePos + 1, INCLUDE_DIRECTIVE_LENGTH, INCLUDE_DIRECTIVE) != 0)
if (line.m_line.compare(includeDirectivePosition + 1, INCLUDE_DIRECTIVE_LENGTH, INCLUDE_DIRECTIVE) != 0)
{
return false;
}
hasIncludeDirective = true;
break;
return true;
}
if (!hasIncludeDirective)
return false;
}
auto currentPos = includeDirectivePos + INCLUDE_DIRECTIVE_LENGTH + 1;
bool IncludingStreamProxy::ExtractIncludeFilename(const ParserLine& line, const unsigned includeDirectivePosition, unsigned& filenameStartPosition, unsigned& filenameEndPosition)
{
auto currentPos = includeDirectivePosition;
bool isDoubleQuotes;
if (line.m_line[currentPos] == '"')
isDoubleQuotes = true;
@ -45,9 +44,8 @@ bool IncludingStreamProxy::MatchIncludeDirective(const ParserLine& line) const
else
throw ParsingException(TokenPos(line.m_filename, line.m_line_number, currentPos), INCLUDE_QUOTES_ERROR);
const auto filenameStart = ++currentPos;
unsigned filenameEnd = 0;
auto filenameHasEnd = false;
filenameStartPosition = ++currentPos;
filenameEndPosition = 0;
for (; currentPos < line.m_line.size(); currentPos++)
{
@ -57,22 +55,33 @@ bool IncludingStreamProxy::MatchIncludeDirective(const ParserLine& line) const
{
if (!isDoubleQuotes)
throw ParsingException(TokenPos(line.m_filename, line.m_line_number, currentPos), "");
filenameEnd = currentPos;
filenameHasEnd = true;
break;
filenameEndPosition = currentPos;
return true;
}
if (c == '>')
{
if (isDoubleQuotes)
throw ParsingException(TokenPos(line.m_filename, line.m_line_number, currentPos), INCLUDE_QUOTES_ERROR);
filenameEnd = currentPos;
filenameHasEnd = true;
break;
filenameEndPosition = currentPos;
return true;
}
}
if(!filenameHasEnd)
return false;
}
bool IncludingStreamProxy::MatchIncludeDirective(const ParserLine& line) const
{
unsigned includeDirectivePos;
if (!FindIncludeDirective(line, includeDirectivePos))
return false;
const auto currentPos = includeDirectivePos + INCLUDE_DIRECTIVE_LENGTH + 1;
unsigned filenameStart, filenameEnd;
if(!ExtractIncludeFilename(line, currentPos, filenameStart, filenameEnd))
throw ParsingException(TokenPos(line.m_filename, line.m_line_number, currentPos), INCLUDE_QUOTES_ERROR);
if(filenameEnd <= filenameStart)

5
src/ZoneCodeGeneratorNew/Parsing/Impl/IncludingStreamProxy.h
View File

@ -1,5 +1,6 @@
#pragma once
#include "Utils/ClassUtils.h"
#include "Parsing/IParserLineStream.h"
class IncludingStreamProxy final : public IParserLineStream
@ -11,7 +12,9 @@ class IncludingStreamProxy final : public IParserLineStream
IParserLineStream* m_stream;
bool MatchIncludeDirective(const ParserLine& line) const;
_NODISCARD static bool FindIncludeDirective(const ParserLine& line, unsigned& includeDirectivePosition);
_NODISCARD static bool ExtractIncludeFilename(const ParserLine& line, unsigned includeDirectivePosition, unsigned& filenameStartPosition, unsigned& filenameEndPosition);
_NODISCARD bool MatchIncludeDirective(const ParserLine& line) const;
public:
explicit IncludingStreamProxy(IParserLineStream* stream);