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err.cc
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#include "err.h"
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <cstring>
namespace err {
const char *progname;
void
quit(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s: ", progname);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
exit(EXIT_FAILURE);
}
void
sys(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s: ", progname);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
void
warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s: ", progname);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
}
}