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// An implementation of
// https://sampleprograms.io/projects/file-input-output/
val FILE = "output.txt";
val main = { u8[~][] args ->
var str = new sys.aryu8();
str.addAry("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n");
str.addAry("Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\n");
str.addAry("Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\n");
str.addAry("Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n");
// Create
i32 fd = sys.io.create(FILE);
if( fd == -1 ) return _error();
// Write
int wrote = sys.io.writeOff(fd,str.buf,0,str.len);
if( wrote == -1 ) return _error();
if( wrote != str.len ) return _error2(-2);
// Close
if( sys.io.close(fd) != 0 ) return _error();
// Open
i32 fd2 = sys.io.open(FILE);
if( fd2 == -1 ) return _error();
// Read
var got = sys.io.read(fd2);
if( got# != str.len ) return _error2(-3);
// Close
if( sys.io.close(fd2) != 0 ) return _error();
// Check contents are equal
if( sys.ary.cmp(got,0,str.buf,0,str.len) )
return _error2(-4);
// Remove
if( sys.io.remove(FILE) != 0 ) return _error();
sys.io.p("File I/O succeeded\n");
return 0;
};
val _error2 = { i32 errno ->
sys.io.remove(FILE);
new sys.aryu8().addAry("Failed with error code ").num(errno).add('\n').write(sys.libc.STDERR);
sys.libc._exit(errno);
};
val _error = { -> _error2(sys.libc.errno()); };
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