CMake/Source/cmStringCommand.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmStringCommand.h"
//----------------------------------------------------------------------------
bool cmStringCommand::InitialPass(std::vector<std::string> const& args)
{
if(args.size() < 1)
{
this->SetError("must be called with at least one argument.");
return false;
}
std::string subCommand = args[0];
if(subCommand == "REGEX")
{
return this->HandleRegexCommand(args);
}
else if(subCommand == "COMPARE")
{
return this->HandleCompareCommand(args);
}
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std::string e = "does not recognize sub-command "+subCommand;
this->SetError(e.c_str());
return false;
}
//----------------------------------------------------------------------------
bool cmStringCommand::HandleRegexCommand(std::vector<std::string> const& args)
{
if(args.size() < 2)
{
this->SetError("sub-command REGEX requires a mode to be specified.");
return false;
}
std::string mode = args[1];
if(mode == "MATCH")
{
if(args.size() < 5)
{
this->SetError("sub-command REGEX, mode MATCH needs "
"at least 5 arguments total to command.");
return false;
}
return this->RegexMatch(args);
}
else if(mode == "MATCHALL")
{
if(args.size() < 5)
{
this->SetError("sub-command REGEX, mode MATCHALL needs "
"at least 5 arguments total to command.");
return false;
}
return this->RegexMatchAll(args);
}
else if(mode == "REPLACE")
{
if(args.size() < 6)
{
this->SetError("sub-command REGEX, mode MATCH needs "
"at least 6 arguments total to command.");
return false;
}
return this->RegexReplace(args);
}
std::string e = "sub-command REGEX does not recognize mode "+mode;
this->SetError(e.c_str());
return false;
}
//----------------------------------------------------------------------------
bool cmStringCommand::RegexMatch(std::vector<std::string> const& args)
{
//"STRING(REGEX MATCH <regular_expression> <output variable> <input> [<input>...])\n";
std::string regex = args[2];
std::string outvar = args[3];
// Concatenate all the last arguments together.
std::string input = args[4];
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for(unsigned int i=5; i < args.size(); ++i)
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{
input += args[i];
}
// Compile the regular expression.
cmRegularExpression re;
if(!re.compile(regex.c_str()))
{
std::string e = "sub-command REGEX, mode MATCH failed to compile regex \""+regex+"\".";
this->SetError(e.c_str());
return false;
}
// Scan through the input for all matches.
std::string output;
if(re.find(input.c_str()))
{
std::string::size_type l = re.start();
std::string::size_type r = re.end();
if(r-l == 0)
{
std::string e = "sub-command REGEX, mode MATCH regex \""+regex+"\" matched an empty string.";
this->SetError(e.c_str());
return false;
}
output = input.substr(l, r-l);
}
// Store the output in the provided variable.
m_Makefile->AddDefinition(outvar.c_str(), output.c_str());
return true;
}
//----------------------------------------------------------------------------
bool cmStringCommand::RegexMatchAll(std::vector<std::string> const& args)
{
//"STRING(REGEX MATCHALL <regular_expression> <output variable> <input> [<input>...])\n";
std::string regex = args[2];
std::string outvar = args[3];
// Concatenate all the last arguments together.
std::string input = args[4];
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for(unsigned int i=5; i < args.size(); ++i)
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{
input += args[i];
}
// Compile the regular expression.
cmRegularExpression re;
if(!re.compile(regex.c_str()))
{
std::string e = "sub-command REGEX, mode MATCHALL failed to compile regex \""+regex+"\".";
this->SetError(e.c_str());
return false;
}
// Scan through the input for all matches.
std::string output;
const char* p = input.c_str();
while(re.find(p))
{
std::string::size_type l = re.start();
std::string::size_type r = re.end();
if(r-l == 0)
{
std::string e = "sub-command REGEX, mode MATCHALL regex \""+regex+"\" matched an empty string.";
this->SetError(e.c_str());
return false;
}
if(output.length() > 0)
{
output += ";";
}
output += std::string(p+l, r-l);
p += r;
}
// Store the output in the provided variable.
m_Makefile->AddDefinition(outvar.c_str(), output.c_str());
return true;
}
//----------------------------------------------------------------------------
bool cmStringCommand::RegexReplace(std::vector<std::string> const& args)
{
//"STRING(REGEX REPLACE <regular_expression> <replace_expression> <output variable> <input> [<input>...])\n"
std::string regex = args[2];
std::string replace = args[3];
std::string outvar = args[4];
// Pull apart the replace expression to find the escaped [0-9] values.
std::vector<RegexReplacement> replacement;
std::string::size_type l = 0;
while(l < replace.length())
{
std::string::size_type r = replace.find("\\", l);
if(r == std::string::npos)
{
r = replace.length();
replacement.push_back(replace.substr(l, r-l));
}
else
{
if(r-l > 0)
{
replacement.push_back(replace.substr(l, r-l));
}
if(r == (replace.length()-1))
{
this->SetError("sub-command REGEX, mode REPLACE: "
"replace-expression ends in a backslash.");
return false;
}
if((replace[r+1] >= '0') && (replace[r+1] <= '9'))
{
replacement.push_back(replace[r+1]-'0');
}
else if(replace[r+1] == 'n')
{
replacement.push_back("\n");
}
else if(replace[r+1] == '\\')
{
replacement.push_back("\\");
}
else
{
std::string e = "sub-command REGEX, mode REPLACE: Unknown escape \"";
e += replace.substr(r, 2);
e += "\"in replace-expression.";
this->SetError(e.c_str());
return false;
}
r += 2;
}
l = r;
}
// Concatenate all the last arguments together.
std::string input = args[5];
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for(unsigned int i=6; i < args.size(); ++i)
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{
input += args[i];
}
// Compile the regular expression.
cmRegularExpression re;
if(!re.compile(regex.c_str()))
{
std::string e = "sub-command REGEX, mode REPLACE failed to compile regex \""+regex+"\".";
this->SetError(e.c_str());
return false;
}
// Scan through the input for all matches.
std::string output;
std::string::size_type base = 0;
while(re.find(input.c_str()+base))
{
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std::string::size_type l2 = re.start();
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std::string::size_type r = re.end();
// Concatenate the part of the input that was not matched.
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output += input.substr(base, l2);
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// Make sure the match had some text.
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if(r-l2 == 0)
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{
std::string e = "sub-command REGEX, mode REPLACE regex \""+regex+"\" matched an empty string.";
this->SetError(e.c_str());
return false;
}
// Concatenate the replacement for the match.
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for(unsigned int i=0; i < replacement.size(); ++i)
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{
if(replacement[i].number < 0)
{
// This is just a plain-text part of the replacement.
output += replacement[i].value;
}
else
{
// Replace with part of the match.
int n = replacement[i].number;
std::string::size_type start = re.start(n);
std::string::size_type end = re.end(n);
std::string::size_type len = input.length()-base;
if((start != std::string::npos) && (end != std::string::npos) &&
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(start <= len) && (end <= len))
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{
output += input.substr(base+start, end-start);
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}
else
{
std::string e =
"sub-command REGEX, mode REPLACE: replace expression \""+
replace+"\" contains an out-of-range escape for regex \""+
regex+"\".";
this->SetError(e.c_str());
return false;
}
}
}
// Move past the match.
base += r;
}
// Concatenate the text after the last match.
output += input.substr(base, input.length()-base);
// Store the output in the provided variable.
m_Makefile->AddDefinition(outvar.c_str(), output.c_str());
return true;
}
//----------------------------------------------------------------------------
bool cmStringCommand::HandleCompareCommand(std::vector<std::string> const& args)
{
if(args.size() < 2)
{
this->SetError("sub-command COMPARE requires a mode to be specified.");
return false;
}
std::string mode = args[1];
if((mode == "EQUAL") || (mode == "NOTEQUAL") ||
(mode == "LESS") || (mode == "GREATER"))
{
if(args.size() < 5)
{
std::string e = "sub-command COMPARE, mode ";
e += mode;
e += " needs at least 5 arguments total to command.";
this->SetError(e.c_str());
return false;
}
const std::string& left = args[2];
const std::string& right = args[3];
const std::string& outvar = args[4];
bool result;
if(mode == "LESS")
{
result = (left < right);
}
else if(mode == "GREATER")
{
result = (left > right);
}
else if(mode == "EQUAL")
{
result = (left == right);
}
else // if(mode == "NOTEQUAL")
{
result = !(left == right);
}
if(result)
{
m_Makefile->AddDefinition(outvar.c_str(), "1");
}
else
{
m_Makefile->AddDefinition(outvar.c_str(), "0");
}
return true;
}
std::string e = "sub-command COMPARE does not recognize mode "+mode;
this->SetError(e.c_str());
return false;
}