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 "cmMakefile.h"
#include "cmOutputConverter.h"
#include "cmState.h"
#include "cmSystemTools.h"
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#include "cmCommandArgumentLexer.h"
int cmCommandArgument_yyparse(yyscan_t yyscanner);
//
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cmCommandArgumentParserHelper::cmCommandArgumentParserHelper()
{
this->WarnUninitialized = false;
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this->CheckSystemVars = false;
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this->FileLine = -1;
this->FileName = 0;
this->RemoveEmpty = true;
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this->EmptyVariable[0] = 0;
strcpy(this->DCURLYVariable, "${");
strcpy(this->RCURLYVariable, "}");
strcpy(this->ATVariable, "@");
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strcpy(this->DOLLARVariable, "$");
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 std::string& str)
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{
if (str.empty()) {
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return this->EmptyVariable;
}
char* stVal = new char[str.size() + 1];
strcpy(stVal, str.c_str());
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this->Variables.push_back(stVal);
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return stVal;
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}
char* cmCommandArgumentParserHelper::ExpandSpecialVariable(const char* key,
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const char* var)
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{
if (!key) {
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return this->ExpandVariable(var);
}
if (!var) {
return this->EmptyVariable;
}
if (strcmp(key, "ENV") == 0) {
char* ptr = getenv(var);
if (ptr) {
if (this->EscapeQuotes) {
return this->AddString(cmSystemTools::EscapeQuotes(ptr));
} else {
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return ptr;
}
}
return this->EmptyVariable;
}
if (strcmp(key, "CACHE") == 0) {
if (const char* c =
this->Makefile->GetState()->GetInitializedCacheValue(var)) {
if (this->EscapeQuotes) {
return this->AddString(cmSystemTools::EscapeQuotes(c));
} else {
return this->AddString(c);
}
}
return this->EmptyVariable;
}
std::ostringstream 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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{
if (!var) {
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return 0;
}
if (this->FileLine >= 0 && strcmp(var, "CMAKE_CURRENT_LIST_LINE") == 0) {
std::ostringstream ostr;
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ostr << this->FileLine;
return this->AddString(ostr.str());
}
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const char* value = this->Makefile->GetDefinition(var);
if (!value && !this->RemoveEmpty) {
// check to see if we need to print a warning
// if strict mode is on and the variable has
// not been "cleared"/initialized with a set(foo ) call
if (this->WarnUninitialized && !this->Makefile->VariableInitialized(var)) {
if (this->CheckSystemVars ||
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cmSystemTools::IsSubDirectory(this->FileName,
this->Makefile->GetHomeDirectory()) ||
cmSystemTools::IsSubDirectory(
this->FileName, this->Makefile->GetHomeOutputDirectory())) {
std::ostringstream msg;
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msg << "uninitialized variable \'" << var << "\'";
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, msg.str());
}
}
return 0;
}
if (this->EscapeQuotes && value) {
return this->AddString(cmSystemTools::EscapeQuotes(value));
}
return this->AddString(value ? value : "");
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}
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("");
}
// 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);
}
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char* cmCommandArgumentParserHelper::CombineUnions(char* in1, char* in2)
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{
if (!in1) {
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return in2;
} else if (!in2) {
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return in1;
}
size_t len = strlen(in1) + strlen(in2) + 1;
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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}
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));
}
if (len == 0) {
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return;
}
pt->str = new char[len + 1];
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strncpy(pt->str, str, len);
pt->str[len] = 0;
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this->Variables.push_back(pt->str);
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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: {
std::ostringstream 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) {
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return 0;
}
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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) {
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return 0;
}
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this->CleanupParser();
if (Verbose) {
std::cerr << "Expanding [" << str << "] produced: [" << this->Result << "]"
<< std::endl;
}
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return 1;
}
void cmCommandArgumentParserHelper::CleanupParser()
{
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std::vector<char*>::iterator sit;
for (sit = this->Variables.begin(); sit != this->Variables.end(); ++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) {
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return 0;
}
if (this->InputBufferPos < this->InputBuffer.size()) {
buf[0] = this->InputBuffer[this->InputBufferPos++];
if (buf[0] == '\n') {
this->CurrentLine++;
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}
return (1);
} else {
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buf[0] = '\n';
return (0);
}
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}
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void cmCommandArgumentParserHelper::Error(const char* str)
{
unsigned long pos = static_cast<unsigned long>(this->InputBufferPos);
std::ostringstream ostr;
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ostr << str << " (" << pos << ")";
this->SetError(ostr.str());
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}
void cmCommandArgumentParserHelper::SetMakefile(const cmMakefile* mf)
{
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this->Makefile = mf;
this->WarnUninitialized = mf->GetCMakeInstance()->GetWarnUninitialized();
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this->CheckSystemVars = mf->GetCMakeInstance()->GetCheckSystemVars();
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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;
}
}