?
hi!
so nun fehler gefunden, problem war: ich hatte den fstream nicht gelöscht vor dem öffnen...m_stream.clear();
LogBook book("hallo", "sers", "File.txt");
in der datei File.txt werden alle hallo durch sers ersetzt...
code ist sicher nicht der schöneste...soll nur mal zeigen wie es gehen kann;-)
cu
#include <fstream>
#include <iostream>
#include <string>
using namespace std;
#define STR(x) # x
#define SSTR(x) STR(x)
class LogBook
{
private:
std::string filename;
std::string search_str;
std::string replace_str;
std::string txt_str;
fstream m_stream;
void openfile(bool read_write)
{
try
{
int pos = filename.find(".");
string s1 = filename.substr(pos, filename.length());
if(s1 != ".txt")
throw runtime_error("::File open failed, unsupported file format! " __FILE__ " " SSTR(__LINE__));
m_stream.clear();
// Datei oeffnen
if(read_write == 0) {
m_stream.open(filename.c_str(), ios::in);
}
else {
m_stream.open(filename.c_str(), ios::out);
}
if (!m_stream) {
throw runtime_error("::File open failed! " __FILE__ " " SSTR(__LINE__));
}
}
catch(...)
{
m_stream.close();
throw;
}
}
void replace_all(std::string &s, const char *from, const char *to)
{
unsigned pos = 0, len = strlen( from );
while ((pos = s.find( from, pos )) != s.npos)
{
s.replace( pos, len, to );
}
}
void read()
{
std::string str_read;
while (m_stream.good())
{
str_read = "";
getline(m_stream, str_read);
replace_all(str_read, search_str.c_str(), replace_str.c_str());
txt_str += str_read;
txt_str += '\n';
}
if(!txt_str.empty() && txt_str[txt_str.length()-1]=='\n') { txt_str.erase(txt_str.end()-1); }
}
void write()
{
m_stream << txt_str;
cout << txt_str << endl;
}
void closefile()
{
m_stream.close();
}
public:
LogBook(const std::string &search_str_, const std::string &replace_str_, const std::string &filename_): search_str(search_str_), replace_str(replace_str_), filename(filename_) {}
void replace()
{
openfile(false);
read();
closefile();
openfile(true);
write();
closefile();
}
};
template<class T>
void WaitForReturn(T& stream)
{
stream.clear();
stream.ignore(stream.rdbuf()->in_avail());
stream.get();
}
int main()
{
LogBook book("hallo", "sers", "File.txt");
book.replace();
WaitForReturn(cin);
return 0;
}
