#include <fstream>
#include <testsuite_hooks.h>
#include <testsuite_io.h>
const char name_01[] = "tmp_sputbackc_2io.tst";
void test01()
{
using namespace std;
using namespace __gnu_test;
typedef filebuf::int_type int_type;
typedef filebuf::traits_type traits_type;
typedef size_t size_type;
bool test __attribute__((unused)) = true;
streamsize strmsz_1, strmsz_2;
int_type c1, c2, c3;
{
constraint_filebuf fb_01;
fb_01.pubsetbuf(0, 0);
fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc);
VERIFY( fb_01.unbuffered() );
strmsz_1 = fb_01.sputn("racadabras", 10); strmsz_2 = fb_01.sputn(", i wanna reach out and", 10);
fb_01.pubseekoff(0, std::ios_base::cur);
c1 = fb_01.sgetc(); c2 = fb_01.sputbackc('z');
strmsz_2 = fb_01.in_avail();
c3 = fb_01.sgetc();
VERIFY( c3 == c2 );
VERIFY( c1 != c3 );
VERIFY( 1 == strmsz_2 );
fb_01.pubseekoff(10, std::ios_base::beg);
fb_01.sputc('m');
fb_01.pubseekoff(0, std::ios_base::cur);
strmsz_1 = fb_01.in_avail();
c1 = fb_01.sgetc();
fb_01.snextc();
c2 = fb_01.sputbackc('z');
strmsz_2 = fb_01.in_avail();
c3 = fb_01.sgetc();
VERIFY( c1 != c2 );
VERIFY( c3 == c2 );
VERIFY( c1 != c3 );
VERIFY( c2 == 'z' );
fb_01.snextc();
fb_01.pubseekoff(0, std::ios_base::cur);
fb_01.sputc('u');
fb_01.sputc('v');
fb_01.sputc('a');
fb_01.pubseekoff(0, std::ios_base::end);
strmsz_1 = fb_01.in_avail();
c2 = fb_01.sputbackc('a');
strmsz_2 = fb_01.in_avail();
c3 = fb_01.sgetc();
VERIFY( c3 == c2 );
VERIFY( strmsz_1 + 1 == strmsz_2 );
VERIFY( fb_01.unbuffered() );
}
}
int main()
{
test01();
return 0;
}