CMake/Source/cmCommandArgumentParserHelp...

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
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#include "cmCommandArgumentParserHelper.h"
#include "cmSystemTools.h"
#include "cmCommandArgumentLexer.h"
#include "cmMakefile.h"
int cmCommandArgument_yyparse( yyscan_t yyscanner );
//
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cmCommandArgumentParserHelper::cmCommandArgumentParserHelper()
{
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this->FileLine = -1;
this->FileName = 0;
this->RemoveEmpty = true;
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this->EmptyVariable[0] = 0;
strcpy(this->DCURLYVariable, "${");
strcpy(this->RCURLYVariable, "}");
strcpy(this->ATVariable, "@");
strcpy(this->DOLLARVariable, "$");
strcpy(this->LCURLYVariable, "{");
strcpy(this->BSLASHVariable, "\\");
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this->NoEscapeMode = false;
this->ReplaceAtSyntax = false;
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}
cmCommandArgumentParserHelper::~cmCommandArgumentParserHelper()
{
this->CleanupParser();
}
void cmCommandArgumentParserHelper::SetLineFile(long line, const char* file)
{
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this->FileLine = line;
this->FileName = file;
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}
char* cmCommandArgumentParserHelper::AddString(const char* str)
{
if ( !str || !*str )
{
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return this->EmptyVariable;
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}
char* stVal = new char[strlen(str)+1];
strcpy(stVal, str);
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this->Variables.push_back(stVal);
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return stVal;
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}
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char* cmCommandArgumentParserHelper::ExpandSpecialVariable(const char* key,
const char* var)
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{
if ( !key )
{
return this->ExpandVariable(var);
}
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if ( strcmp(key, "ENV") == 0 )
{
char *ptr = getenv(var);
if (ptr)
{
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if (this->EscapeQuotes)
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{
return this->AddString(cmSystemTools::EscapeQuotes(ptr).c_str());
}
else
{
return ptr;
}
}
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return this->EmptyVariable;
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}
if ( strcmp(key, "CACHE") == 0 )
{
if(const char* c = this->Makefile->GetCacheManager()->GetCacheValue(var))
{
if(this->EscapeQuotes)
{
return this->AddString(cmSystemTools::EscapeQuotes(c).c_str());
}
else
{
return this->AddString(c);
}
}
return this->EmptyVariable;
}
cmOStringStream e;
e << "Syntax $" << key << "{} is not supported. "
<< "Only ${}, $ENV{}, and $CACHE{} are allowed.";
this->SetError(e.str());
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return 0;
}
char* cmCommandArgumentParserHelper::ExpandVariable(const char* var)
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{
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if(!var)
{
return 0;
}
if(this->FileLine >= 0 && strcmp(var, "CMAKE_CURRENT_LIST_LINE") == 0)
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{
cmOStringStream ostr;
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ostr << this->FileLine;
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return this->AddString(ostr.str().c_str());
}
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const char* value = this->Makefile->GetDefinition(var);
if(!value && !this->RemoveEmpty)
{
return 0;
}
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if (this->EscapeQuotes && value)
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{
return this->AddString(cmSystemTools::EscapeQuotes(value).c_str());
}
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return this->AddString(value);
}
char* cmCommandArgumentParserHelper::ExpandVariableForAt(const char* var)
{
if(this->ReplaceAtSyntax)
{
// try to expand the variable
char* ret = this->ExpandVariable(var);
// if the return was 0 and we want to replace empty strings
// then return an empty string
if(!ret && this->RemoveEmpty)
{
return this->AddString(ret);
}
// if the ret was not 0, then return it
if(ret)
{
return ret;
}
}
// at this point we want to put it back because of one of these cases:
// - this->ReplaceAtSyntax is false
// - this->ReplaceAtSyntax is true, but this->RemoveEmpty is false,
// and the variable was not defined
std::string ref = "@";
ref += var;
ref += "@";
return this->AddString(ref.c_str());
}
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char* cmCommandArgumentParserHelper::CombineUnions(char* in1, char* in2)
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{
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if ( !in1 )
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{
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return in2;
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}
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else if ( !in2 )
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{
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return in1;
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}
size_t len = strlen(in1) + strlen(in2) + 1;
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char* out = new char [ len ];
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strcpy(out, in1);
strcat(out, in2);
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this->Variables.push_back(out);
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return out;
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}
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void cmCommandArgumentParserHelper::AllocateParserType
(cmCommandArgumentParserHelper::ParserType* pt,const char* str, int len)
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{
pt->str = 0;
if ( len == 0 )
{
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len = static_cast<int>(strlen(str));
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}
if ( len == 0 )
{
return;
}
pt->str = new char[ len + 1 ];
strncpy(pt->str, str, len);
pt->str[len] = 0;
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this->Variables.push_back(pt->str);
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}
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bool cmCommandArgumentParserHelper::HandleEscapeSymbol
(cmCommandArgumentParserHelper::ParserType* pt, char symbol)
{
switch ( symbol )
{
case '\\':
case '"':
case ' ':
case '#':
case '(':
case ')':
case '$':
case '@':
case '^':
this->AllocateParserType(pt, &symbol, 1);
break;
case ';':
this->AllocateParserType(pt, "\\;", 2);
break;
case 't':
this->AllocateParserType(pt, "\t", 1);
break;
case 'n':
this->AllocateParserType(pt, "\n", 1);
break;
case 'r':
this->AllocateParserType(pt, "\r", 1);
break;
case '0':
this->AllocateParserType(pt, "\0", 1);
break;
default:
{
cmOStringStream e;
e << "Invalid escape sequence \\" << symbol;
this->SetError(e.str());
}
return false;
}
return true;
}
void cmCommandArgument_SetupEscapes(yyscan_t yyscanner, bool noEscapes);
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int cmCommandArgumentParserHelper::ParseString(const char* str, int verb)
{
if ( !str)
{
return 0;
}
this->Verbose = verb;
this->InputBuffer = str;
this->InputBufferPos = 0;
this->CurrentLine = 0;
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this->Result = "";
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yyscan_t yyscanner;
cmCommandArgument_yylex_init(&yyscanner);
cmCommandArgument_yyset_extra(this, yyscanner);
cmCommandArgument_SetupEscapes(yyscanner, this->NoEscapeMode);
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int res = cmCommandArgument_yyparse(yyscanner);
cmCommandArgument_yylex_destroy(yyscanner);
if ( res != 0 )
{
return 0;
}
this->CleanupParser();
if ( Verbose )
{
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std::cerr << "Expanding [" << str << "] produced: ["
<< this->Result.c_str() << "]" << std::endl;
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}
return 1;
}
void cmCommandArgumentParserHelper::CleanupParser()
{
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std::vector<char*>::iterator sit;
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for ( sit = this->Variables.begin();
sit != this->Variables.end();
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++ sit )
{
delete [] *sit;
}
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this->Variables.erase(this->Variables.begin(), this->Variables.end());
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}
int cmCommandArgumentParserHelper::LexInput(char* buf, int maxlen)
{
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);
}
else
{
buf[0] = '\n';
return( 0 );
}
}
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void cmCommandArgumentParserHelper::Error(const char* str)
{
unsigned long pos = static_cast<unsigned long>(this->InputBufferPos);
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cmOStringStream ostr;
ostr << str << " (" << pos << ")";
this->SetError(ostr.str());
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}
void cmCommandArgumentParserHelper::SetMakefile(const cmMakefile* mf)
{
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this->Makefile = mf;
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}
void cmCommandArgumentParserHelper::SetResult(const char* value)
{
if ( !value )
{
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this->Result = "";
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return;
}
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this->Result = value;
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}
void cmCommandArgumentParserHelper::SetError(std::string const& msg)
{
// Keep only the first error.
if(this->ErrorString.empty())
{
this->ErrorString = msg;
}
}