streamhelper.hpp

// LGPL 3 or higher Robert Burner Schadek rburners@gmail.com
#pragma once

#include <fstream>

namespace sweet {
inline int checkErrorBits(std::ifstream* f) {
	int stop = 0;
	if (f->eof()) {
		perror("stream eofbit. error state");
		// EOF after std::getline() is not the criterion to stop processing
		// data: In case there is data between the last delimiter and EOF,
		// getline() extracts it and sets the eofbit.
		stop = 0;
	}
	if (f->fail()) {
		perror("stream failbit (or badbit). error state");
		stop = 1;
	}
	if (f->bad()) {
		perror("stream badbit. error state");
		stop = 1;
	}
	return stop;
}

inline int checkErrorBits(std::ofstream* f) {
	int stop = 0;
	if (f->eof()) {
		perror("stream eofbit. error state");
		// EOF after std::getline() is not the criterion to stop processing
		// data: In case there is data between the last delimiter and EOF,
		// getline() extracts it and sets the eofbit.
		stop = 0;
	}
	if (f->fail()) {
		perror("stream failbit (or badbit). error state");
		stop = 1;
	}
	if (f->bad()) {
		perror("stream badbit. error state");
		stop = 1;
	}
	return stop;
}

inline std::string istreamToString(std::istream& in) {
	std::string ret;
	char buffer[4096];
	while(in.read(buffer, sizeof(buffer))) {
	    ret.append(buffer, sizeof(buffer));
	}
	ret.append(buffer, static_cast<size_t>(in.gcount()));
	return ret;
}

} // ~namespace sweet