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Make DefinesProxy go over a line with defines substitution multiple times until no further substitution has been done

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Jan
2021-10-31 16:21:04 +01:00
parent bba55706bf
commit 9816d01ac2
2 changed files with 83 additions and 70 deletions
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139
src/Parser/Parsing/Impl/DefinesStreamProxy.cpp
View File

@@ -26,7 +26,7 @@ DefinesStreamProxy::Define::Define(std::string name, std::string value)
{
}
std::string DefinesStreamProxy::Define::Render(std::vector<std::string>& parameterValues)
std::string DefinesStreamProxy::Define::Render(const std::vector<std::string>& parameterValues)
{
if (parameterValues.empty() || m_parameter_positions.empty())
return m_value;
@@ -52,7 +52,7 @@ std::string DefinesStreamProxy::Define::Render(std::vector<std::string>& paramet
return str.str();
}
void DefinesStreamProxy::Define::IdentifyParameters(std::vector<std::string>& parameterNames)
void DefinesStreamProxy::Define::IdentifyParameters(const std::vector<std::string>& parameterNames)
{
if (parameterNames.empty())
return;
@@ -168,7 +168,7 @@ bool DefinesStreamProxy::MatchDefineDirective(const ParserLine& line, unsigned d
const auto name = line.m_line.substr(nameStartPos, directivePosition - nameStartPos);
auto parameters = MatchDefineParameters(line, directivePosition);
const auto parameters = MatchDefineParameters(line, directivePosition);
std::string value;
if (directivePosition < line.m_line.size())
@@ -346,77 +346,88 @@ void DefinesStreamProxy::ExtractParametersFromDefineUsage(const ParserLine& line
void DefinesStreamProxy::ExpandDefines(ParserLine& line)
{
auto wordStart = 0u;
auto lastWordEnd = 0u;
auto inWord = false;
Define* value;
bool usesDefines;
auto defineIterations = 0u;
std::ostringstream str;
auto usesDefines = false;
for (auto i = 0u; i < line.m_line.size(); i++)
do
{
const auto c = line.m_line[i];
if (!inWord)
if (defineIterations > MAX_DEFINE_ITERATIONS)
throw ParsingException(CreatePos(line, 1), "Potential define loop? Exceeded max define iterations of " + std::to_string(MAX_DEFINE_ITERATIONS) + " iterations.");
usesDefines = false;
auto wordStart = 0u;
auto lastWordEnd = 0u;
auto inWord = false;
Define* value;
std::ostringstream str;
for (auto i = 0u; i < line.m_line.size(); i++)
{
if (isalpha(c) || c == '_')
const auto c = line.m_line[i];
if (!inWord)
{
wordStart = i;
inWord = true;
}
}
else
{
if (!isalnum(c) && c != '_')
{
if (FindDefineForWord(line, wordStart, i, value))
if (isalpha(c) || c == '_')
{
std::vector<std::string> parameterValues;
ExtractParametersFromDefineUsage(line, i, i, parameterValues);
const auto defineValue = value->Render(parameterValues);
if (!usesDefines)
{
str << std::string(line.m_line, 0, wordStart) << defineValue;
usesDefines = true;
}
else
{
str << std::string(line.m_line, lastWordEnd, wordStart - lastWordEnd) << defineValue;
}
lastWordEnd = i;
wordStart = i;
inWord = true;
}
inWord = false;
}
}
}
if (inWord)
{
if (FindDefineForWord(line, wordStart, line.m_line.size(), value))
{
std::vector<std::string> parameterValues;
const auto defineValue = value->Render(parameterValues);
if (!usesDefines)
{
str << std::string(line.m_line, 0, wordStart) << defineValue;
usesDefines = true;
}
else
{
str << std::string(line.m_line, lastWordEnd, wordStart - lastWordEnd) << defineValue;
}
lastWordEnd = line.m_line.size();
}
}
if (!isalnum(c) && c != '_')
{
if (FindDefineForWord(line, wordStart, i, value))
{
std::vector<std::string> parameterValues;
ExtractParametersFromDefineUsage(line, i, i, parameterValues);
const auto defineValue = value->Render(parameterValues);
if (usesDefines)
{
if (lastWordEnd < line.m_line.size())
str << std::string(line.m_line, lastWordEnd, line.m_line.size() - lastWordEnd);
line.m_line = str.str();
}
if (!usesDefines)
{
str << std::string(line.m_line, 0, wordStart) << defineValue;
usesDefines = true;
}
else
{
str << std::string(line.m_line, lastWordEnd, wordStart - lastWordEnd) << defineValue;
}
lastWordEnd = i;
}
inWord = false;
}
}
}
if (inWord)
{
if (FindDefineForWord(line, wordStart, line.m_line.size(), value))
{
const std::vector<std::string> parameterValues;
const auto defineValue = value->Render(parameterValues);
if (!usesDefines)
{
str << std::string(line.m_line, 0, wordStart) << defineValue;
usesDefines = true;
}
else
{
str << std::string(line.m_line, lastWordEnd, wordStart - lastWordEnd) << defineValue;
}
lastWordEnd = line.m_line.size();
}
}
if (usesDefines)
{
if (lastWordEnd < line.m_line.size())
str << std::string(line.m_line, lastWordEnd, line.m_line.size() - lastWordEnd);
line.m_line = str.str();
}
defineIterations++;
} while (usesDefines);
}
void DefinesStreamProxy::AddDefine(Define define)

14
src/Parser/Parsing/Impl/DefinesStreamProxy.h
View File

@@ -15,6 +15,8 @@ class DefinesStreamProxy final : public AbstractDirectiveStreamProxy
static constexpr const char* ELSE_DIRECTIVE = "else";
static constexpr const char* ENDIF_DIRECTIVE = "endif";
static constexpr auto MAX_DEFINE_ITERATIONS = 128u;
public:
class DefineParameterPosition
{
@@ -35,8 +37,8 @@ public:
Define();
Define(std::string name, std::string value);
void IdentifyParameters(std::vector<std::string>& parameterNames);
std::string Render(std::vector<std::string>& parameterValues);
void IdentifyParameters(const std::vector<std::string>& parameterNames);
std::string Render(const std::vector<std::string>& parameterValues);
};
private:
@@ -44,16 +46,16 @@ private:
std::unordered_map<std::string, Define> m_defines;
std::stack<bool> m_modes;
unsigned m_ignore_depth;
std::vector<std::string> MatchDefineParameters(const ParserLine& line, unsigned& parameterPosition);
static std::vector<std::string> MatchDefineParameters(const ParserLine& line, unsigned& parameterPosition);
_NODISCARD bool MatchDefineDirective(const ParserLine& line, unsigned directivePosition);
_NODISCARD bool MatchUndefDirective(const ParserLine& line, unsigned directivePosition);
_NODISCARD bool MatchIfdefDirective(const ParserLine& line, unsigned directivePosition);
_NODISCARD bool MatchElseDirective(const ParserLine& line, unsigned directivePosition);
_NODISCARD bool MatchEndifDirective(const ParserLine& line, unsigned directivePosition);
_NODISCARD bool MatchDirectives(const ParserLine& line);
void ExtractParametersFromDefineUsage(const ParserLine& line, unsigned parameterStart, unsigned& parameterEnd, std::vector<std::string>& parameterValues);
static void ExtractParametersFromDefineUsage(const ParserLine& line, unsigned parameterStart, unsigned& parameterEnd, std::vector<std::string>& parameterValues);
bool FindDefineForWord(const ParserLine& line, unsigned wordStart, unsigned wordEnd, Define*& value);
void ExpandDefines(ParserLine& line);