Header file:
#pragma once
#include <string>
using namespace std;
class Paths
{
private:
public:
Paths();
string Image(string key, string extension = "png");
string Font(string key, string extensino = "TTF");
};
CPP file:
#include "Paths.hpp"
Paths::Paths()
{
}
string Paths::Image(string key = "nullImage", string extension = "png")
{
return "data/images/" + key + "." + extension;
}
string Paths::Font(string key = "NULLFONT", string extension = "TTF")
{
return "data/fonts/" + key + "." + extension;
}
For my program, I want to facilitate the images, fonts (etc) paths.
For my 2 string voids, visual studio says: "Redefinition of default argument: parameter 2". Can anyone explain what this means and how I can fix my code?
Related
I'm trying to create a Sprite with SonarFrameworks, and get a null although my file is well integrated into the project.
I tried to add :
FileUtils::getInstance()->addSearchPath("res/");
And try with Content property set to "True" and "False" (default), but still same problem.
Any idea ?
Thanks to GandhiGandhi I found the solution :
In the function FileUtils::fullPathForFilename located in the file CCFileUtils.cpp, a added this
std::string search = searchIt;
int tail = search.size() - 10; // For replace /Resources
search.replace(tail, 9, "res");
After the first "for(...){", so like that I replaced the path to find my resources.
for (const std::string& searchIt : _searchPathArray)
{
std::string search = searchIt;
int tail = search.size() - 10; // For replace /Resources
search.replace(tail, 9, "res");
for (const auto& resolutionIt : _searchResolutionsOrderArray)
{
fullpath = this->getPathForFilename(newFilename, resolutionIt, search);
if (!fullpath.empty())
{
// Using the filename passed in as key.
_fullPathCache.emplace(filename, fullpath);
return fullpath;
}
}
}
I have the following cpp code that defines a UDF in Netezza that takes a date of some format and changes it into the standard YYYYMMDD format:
//dateconvert.cpp
#include <stdarg.h>
#include <string.h>
#include "udxinc.h"
#include "udxhelpers.h"
using namespace nz::udx_ver2;
class Dateconvert: public Udf
{
public:
Dateconvert(UdxInit *pInit) : Udf(pInit){}
~Dateconvert(){}
static Udf* instantiate();
virtual ReturnValue evaluate()
{
StringReturn* ret = stringReturnInfo();
StringArg *str;
str = stringArg(0);
int lengths = str->length;
char *datas = str->data;
string data = datas;
data = "'" + data + "'";
string cmd="date -d " + data + " +%Y%m%d 2>/dev/null";
FILE *ls = popen(cmd.c_str(), "r");
char retval[100];
fgets(retval, sizeof(retval), ls);
if(!isdigit(retval[0]))
{
strcpy(retval,"99991231");
}
pclose(ls);
ret->size = sizeof(retval);
memcpy(ret->data, retval, sizeof(retval));
NZ_UDX_RETURN_STRING(ret);
}
};
Udf* Dateconvert::instantiate(UdxInit *pInit)
{
return new Dateconvert(pInit);
}
This is the command I use to compile/register the UDF:
nzudxcompile /export/home/nz/dateconvert.cpp -o dateconvert.o --sig
"Dateconvert(VARCHAR(200))" --version 2 --return VARCHAR(200)
--class Dateconvert --user user1 --pw password1 --db db1
When I go to compile, I get the error:
-bash: syntax error near unexpected token `('
How can bash be generating a compilation error when compiling a c++ program? The error persists even when blanking the cpp file itself, so I would assume the issue is with the compilation command.
I want to rewrite all messages in my code,
I need replace only selectors, but I need be able to replace nested expressions
f. e. :
[super foo:[someInstance someMessage:#""] foo2:[someInstance someMessage2]];
I tried do it with clang::Rewriter replaceText and just generate new string,
but there is a problem: It would not be work if I change selectors length, because I replace nested messages with those old positions.
So, I assumed that I need to use clang::Rewriter ReplaceStmt(originalStatement, newStatement);
I am using RecursiveASTVisitor to visit all messages, and I want to copy those messages objects, and replace selectors:
How can I do that?
I tried use ObjCMessageExpr::Create but there is so meny args, I don't know how to get ASTContext &Context and ArrayRef<SourceLocation> SeLocs and Expr *Receiver parameters from the original message.
What is the proper way to replace selectors in nested messages using clang tool (clang tooling interface)?
Update:
Should I use ReplaceStmtWithStmt callback and ASTMatchFinder ?
Update:
I am using following function to rewrite text in file:
void ReplaceText(SourceLocation start, unsigned originalLength, StringRef string) {
m_rewriter.ReplaceText(start, originalLength, string);
m_rewriter.overwriteChangedFiles();
}
And I want to replace all messageExpr in code with new selector f.e:
how it was:
[object someMessage:[object2 someMessage:obj3 calculate:obj4]];
how it should be:
[object newSelector:[object2 newSelector:obj3 newSelector:obj4]];
I am using ReqoursiveASTVisitor:
bool VisitStmt(Stmt *statement) {
if (ObjCMessageExpr *messageExpr = dyn_cast<ObjCMessageExpr>(statement)) {
ReplaceMessage(*messageExpr)
}
return true;
}
I created method for generating new message expr string:
string StringFromObjCMessageExpr(ObjCMessageExpr& messageExpression) {
std::ostringstream stringStream;
const string selectorString = messageExpression.getSelector().getAsString();
cout << selectorString << endl;
vector<string> methodParts;
split(selectorString, ParametersDelimiter, methodParts);
stringStream << "[" ;
const string receiver = GetStringFromLocations(m_compiler, messageExpression.getReceiverRange().getBegin(), messageExpression.getSelectorStartLoc());
stringStream << receiver;
clang::ObjCMessageExpr::arg_iterator argIterator = messageExpression.arg_begin();
for (vector<string>::const_iterator partsIterator = methodParts.begin();
partsIterator != methodParts.end();
++partsIterator) {
stringStream << "newSelector";
if (messageExpression.getNumArgs() != 0) {
const clang::Stmt *argument = *argIterator;
stringStream << ":" << GetStatementString(*argument) << " ";
++argIterator;
}
}
stringStream << "]";
return stringStream.str();
}
void ReplaceMessage(ObjCMessageExpr& messageExpression) {
SourceLocation locStart = messageExpression.getLocStart();
SourceLocation locEnd = messageExpression.getLocEnd();
string newExpr = StringFromObjCMessageExpr(messageExpression);
const int exprStringLegth = m_rewriter.getRangeSize(SourceRange(locStart, locEnd));
ReplaceText(locStart, exprStringLegth, newExpr);
}
The problem occurs when I try to replace nested messages, like that:
[simpleClass doSomeActionWithString:string3 andAnotherString:string4];
[simpleClass doSomeActionWithString:str andAnotherString:str2];
[simpleClass doSomeActionWithString:#"" andAnotherString:#"asdasdsad"];
[simpleClass setSimpleClassZAZAZAZAZAZAZAZA:[simpleClass getSimpleClassZAZAZAZAZAZAZAZA]];
the result is:
[simpleClass newSelector:string3 newSelector:string4 ];
[simpleClass newSelector:str newSelector:str2 ];
[simpleClass newSelector:#"" newSelector:#"asdasdsad" ];
[simpleClass newSelector:[simpleClass getSimp[simpleClass newSelector]];
because messageExpression has "old" value of getLocStart(); and getLocEnd(); How can I fix it?
You can rewrite selector name by replacing only continuous parts of selector name. For example, replace only underlined parts
[object someMessage:[object2 someMessage:obj3 calculate:obj4]];
^~~~~~~~~~~ ^~~~~~~~~~~ ^~~~~~~~~
To achieve this you require only
number of selector parts - ObjCMessageExpr::getNumSelectorLocs()
their locations - ObjCMessageExpr::getSelectorLoc(index)
their lengths - ObjCMessageExpr::getSelector().getNameForSlot(index).size().
Overall, you can rewrite ObjCMessageExpr with the following RecursiveASTVisitor:
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Rewrite/Core/Rewriter.h"
namespace clang_tooling
{
using clang::SourceLocation;
class RewritingVisitor : public clang::ASTConsumer,
public clang::RecursiveASTVisitor<RewritingVisitor>
{
public:
// You can obtain SourceManager and LangOptions from CompilerInstance when
// you are creating visitor (which is also ASTConsumer) in
// clang::ASTFrontendAction::CreateASTConsumer.
RewritingVisitor(clang::SourceManager &sourceManager,
const clang::LangOptions &langOptions)
: _sourceManager(sourceManager), _rewriter(sourceManager, langOptions)
{}
virtual void HandleTranslationUnit(clang::ASTContext &context)
{
TraverseDecl(context.getTranslationUnitDecl());
_rewriter.overwriteChangedFiles();
}
bool VisitObjCMessageExpr(clang::ObjCMessageExpr *messageExpr)
{
if (_sourceManager.isInMainFile(messageExpr->getLocStart()))
{
clang::Selector selector = messageExpr->getSelector();
for (unsigned i = 0, end = messageExpr->getNumSelectorLocs();
i < end; ++i)
{
SourceLocation selectorLoc = messageExpr->getSelectorLoc(i);
_rewriter.ReplaceText(selectorLoc,
selector.getNameForSlot(i).size(),
"newSelector");
}
}
return Base::VisitObjCMessageExpr(messageExpr);
}
private:
typedef clang::RecursiveASTVisitor<RewritingVisitor> Base;
clang::SourceManager &_sourceManager;
clang::Rewriter _rewriter;
};
} // end namespace clang_tooling
I want to extract a const char* filename from a const char* filepath. I tried with regex but failed:
const char* currentLoadedFile = "D:\files\file.lua";
char fileName[256];
if (sscanf(currentLoadedFile, "%*[^\\]\\%[^.].lua", fileName)) {
return (const char*)fileName; // WILL RETURN "D:\files\file!!
}
The issue is that "D:\files\file" will be returned and not the wanted "file"(note: without ".lua")
What about using std::string?
e.g.
std::string path("d:\\dir\\subdir\\file.ext");
std::string filename;
size_t pos = path.find_last_of("\\");
if(pos != std::string::npos)
filename.assign(path.begin() + pos + 1, path.end());
else
filename = path;
Just use boost::filesystem.
#include <boost/filesystem.hpp>
std::string filename_noext;
filename_noext = boost::filesystem::path("D:\\files\\file.lua").stem().string().
const char* result_as_const_char = filename_noext.c_str();
or alternatively, if you want to introduce bugs yourself :
// have fun defining that to the separator of the target OS.
#define PLATFORM_DIRECTORY_SEPARATOR '\\'
// the following code is guaranteed to have bugs.
std::string input = "D:\\files\\file.lua";
std::string::size_type filename_begin = input.find_last_of(PLATFORM_DIRECTORY_SEPERATOR);
if (filename_begin == std::string::npos)
filename_begin = 0;
else
filename_begin++;
std::string::size_type filename_length = input.find_last_of('.');
if (filename_length != std::string::npos)
filename_length = filename_length - filename_begin;
std::string result = input.substr(filename_begin, filename_length);
const char* bugy_result_as_const_char = result.c_str();
You can do this portably and easily using the new filesystem library in C++17.
#include <cstdint>
#include <cstdio>
#include <filesystem>
int main()
{
std::filesystem::path my_path("D:/files/file.lua");
std::printf("filename: %s\n", my_path.filename().u8string().c_str());
std::printf("stem: %s\n", my_path.stem().u8string().c_str());
std::printf("extension: %s\n", my_path.extension().u8string().c_str());
}
Output:
filename: file.lua
stem: file
extension: .lua
Do note that for the time being you may need to use #include <experimental/fileystem> along with std::experimental::filesystem instead until standard libraries are fully conforming.
For more documentation on std::filesystem check out the filesystem library reference.
You can easily extract the file:
int main()
{
char pscL_Dir[]="/home/srfuser/kush/folder/kushvendra.txt";
char pscL_FileName[50];
char pscL_FilePath[100];
char *pscL;
pscL=strrchr(pscL_Dir,'/');
if(pscL==NULL)
printf("\n ERROR :INvalid DIr");
else
{
strncpy(pscL_FilePath,pscL_Dir,(pscL-pscL_Dir));
strcpy(pscL_FileName,pscL+1);
printf("LENTH [%d}\n pscL_FilePath[%s]\n pscL_FileName[%s]",(pscL-pscL_Dir),pscL_FilePath,pscL_FileName);
}
return 0;
}
output:
LENTH [25}
pscL_FilePath[/home/srfuser/kush/folder]
pscL_FileName[kushvendra.txt
Here you can find an example. I'm not saying it's the best and I'm sure you could improve on that but it uses only standard C++ (anyway at least what's now considered standard).
Of course you won't have the features of the boost::filesystem (those functions in the example play along with plain strings and do not guarantee/check you'll actually working with a real filesystem path).
// Set short name:
char *Filename;
Filename = strrchr(svFilename, '\\');
if ( Filename == NULL )
Filename = svFilename;
if ( Filename[0] == '\\')
++Filename;
if ( !lstrlen(Filename) )
{
Filename = svFilename;
}
fprintf( m_FileOutput, ";\n; %s\n;\n", Filename );
You could use the _splitpath_s function to break a path name into its components. I don't know if this is standard C or is Windows specific. Anyway this is the function:
#include <stdlib.h>
#include <string>
using std::string;
bool splitPath(string const &path, string &drive, string &directory, string &filename, string &extension) {
// validate path
drive.resize(_MAX_DRIVE);
directory.resize(_MAX_DIR);
filename.resize(_MAX_FNAME);
extension.resize(_MAX_EXT);
errno_t result;
result = _splitpath_s(path.c_str(), &drive[0], drive.size(), &directory[0], directory.size(), &filename[0], filename.size(), &extension[0], extension.size());
//_splitpath(path.c_str(), &drive[0], &directory[0], &filename[0], &extension[0]); //WindowsXp compatibility
_get_errno(&result);
if (result != 0) {
return false;
} else {
//delete the blank spaces at the end
drive = drive.c_str();
directory = directory.c_str();
filename = filename.c_str();
extension = extension.c_str();
return true;
}
}
It is a lot easier and safe to use std::string but you could modify this to use TCHAR* (wchar, char)...
For your specific case:
int main(int argc, char *argv[]) {
string path = argv[0];
string drive, directory, filename, extension;
splitPath(path, drive, directory, filename, extension);
printf("FILE = %s%s", filename.c_str(), extension.c_str());
return 0;
}
If you are going to display a filename to the user on Windows you should respect their shell settings (show/hide extension etc).
You can get a filename in the correct format by calling SHGetFileInfo with the SHGFI_DISPLAYNAME flag.
In MATLAB there's a nice function called fileparts that takes a full file path and parses it into path, filename (without extension), and extension as in the following example from the documentation:
file = 'H:\user4\matlab\classpath.txt';
[pathstr, name, ext] = fileparts(file)
>> pathstr = H:\user4\matlab
>> name = classpath
>> ext = .txt
So I was wondering if there's an equivalent function in any standard C++ or C libraries that I could use? Or would I have to implement this myself? I realize it's fairly simple, but I figured if there's already something pre-made that would be preferable.
Thanks.
The boost library has a file system component "basic_path" that allows you use iterators to discover each component in the filename. Such a component would be OS specific, and I believe you need to compile boost separately for Windows, Linux etc.
I just wrote this simple function. It behaves similar as Matlab's fileparts and works independent of platform.
struct FileParts
{
string path;
string name;
string ext;
};
FileParts fileparts(string filename)
{
int idx0 = filename.rfind("/");
int idx1 = filename.rfind(".");
FileParts fp;
fp.path = filename.substr(0,idx0+1);
fp.name = filename.substr(idx0+1,idx1-idx0-1);
fp.ext = filename.substr(idx1);
return fp;
}
A platform-independent way with C++11/14.
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
void fileparts(string full, string& fpath, string& fname, string& fext)
{
auto source = fs::path(full);
fpath = source.parent_path().string();
fname = source.stem().string();
fext = source.extension().string();
}
...
string fpath, fname, fext;
fileparts(full_file_path,fpath,fname,fext);
Some possible solutions, depending on your OS:
Visual C++ _splitpath function
Win32 Shell Path Handling Functions such as PathFindExtension, PathFindFileName, PathStripPath, PathRemoveExtension, PathRemoveFileSpec
Ekalic's text-only approach is useful, but it didn't check for errors. Here's one that does, and also works with both / and \
struct FileParts
{
std::string path; //!< containing folder, if provided, including trailing slash
std::string name; //!< base file name, without extension
std::string ext; //!< extension, including '.'
};
//! Using only text manipulation, splits a full path into component file parts
FileParts fileparts(const std::string &fullpath)
{
using namespace std;
size_t idxSlash = fullpath.rfind("/");
if (idxSlash == string::npos) {
idxSlash = fullpath.rfind("\\");
}
size_t idxDot = fullpath.rfind(".");
FileParts fp;
if (idxSlash != string::npos && idxDot != string::npos) {
fp.path = fullpath.substr(0, idxSlash + 1);
fp.name = fullpath.substr(idxSlash + 1, idxDot - idxSlash - 1);
fp.ext = fullpath.substr(idxDot);
} else if (idxSlash == string::npos && idxDot == string::npos) {
fp.name = fullpath;
} else if (/* only */ idxSlash == string::npos) {
fp.name = fullpath.substr(0, idxDot);
fp.ext = fullpath.substr(idxDot);
} else { // only idxDot == string::npos
fp.path = fullpath.substr(0, idxSlash + 1);
fp.name = fullpath.substr(idxSlash + 1);
}
return fp;
}