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// See LICENSE for license details.
#ifndef _RISCV_LOGFILE_H
#define _RISCV_LOGFILE_H
#include <stdio.h>
#include <memory>
#include <sstream>
#include <stdexcept>
// Header-only class wrapping a log file. When constructed with an
// actual path, it opens the named file for writing. When constructed
// with the null path, it wraps stderr.
class log_file_t
{
public:
log_file_t(const char *path)
: wrapped_file (nullptr, &fclose)
{
if (!path)
return;
wrapped_file.reset(fopen(path, "w"));
if (! wrapped_file) {
std::ostringstream oss;
oss << "Failed to open log file at `" << path << "': "
<< strerror (errno);
throw std::runtime_error(oss.str());
}
}
FILE *get() { return wrapped_file ? wrapped_file.get() : stderr; }
private:
std::unique_ptr<FILE, int(*)(FILE*)> wrapped_file;
};
#endif
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