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https://github.com/golang/go
synced 2024-11-21 20:24:50 -07:00
parent
1d282a8eb2
commit
9a70762ac9
@ -219,7 +219,6 @@ func (s *ss) Token() (tok string, err os.Error) {
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// readRune is a structure to enable reading UTF-8 encoded code points
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// from an io.Reader. It is used if the Reader given to the scanner does
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// not already implement ReadRuner.
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// TODO: readByteRune for things that can read bytes.
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type readRune struct {
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reader io.Reader
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buf [utf8.UTFMax]byte
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@ -435,9 +434,22 @@ func (s *ss) scanNumber(digits string) string {
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return s.buf.String()
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}
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// scanRune returns the next rune value in the input.
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func (s *ss) scanRune(bitSize uint) int64 {
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rune := int64(s.mustGetRune())
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x := (rune << (64 - bitSize)) >> (64 - bitSize)
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if x != rune {
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s.errorString("overflow on character value " + string(rune))
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}
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return rune
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}
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// scanInt returns the value of the integer represented by the next
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// token, checking for overflow. Any error is stored in s.err.
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func (s *ss) scanInt(verb int, bitSize uint) int64 {
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if verb == 'c' {
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return s.scanRune(bitSize)
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}
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base, digits := s.getBase(verb)
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s.skipSpace()
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s.accept(sign) // If there's a sign, it will be left in the token buffer.
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@ -456,6 +468,9 @@ func (s *ss) scanInt(verb int, bitSize uint) int64 {
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// scanUint returns the value of the unsigned integer represented
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// by the next token, checking for overflow. Any error is stored in s.err.
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func (s *ss) scanUint(verb int, bitSize uint) uint64 {
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if verb == 'c' {
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return uint64(s.scanRune(bitSize))
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}
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base, digits := s.getBase(verb)
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s.skipSpace()
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tok := s.scanNumber(digits)
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@ -198,6 +198,8 @@ var scanfTests = []ScanfTest{
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ScanfTest{"%t", "false\n", &boolVal, false},
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ScanfTest{"%v", "-71\n", &intVal, -71},
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ScanfTest{"%d", "72\n", &intVal, 72},
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ScanfTest{"%c", "a\n", &intVal, 'a'},
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ScanfTest{"%c", "\u1234\n", &intVal, '\u1234'},
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ScanfTest{"%d", "73\n", &int8Val, int8(73)},
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ScanfTest{"%d", "+74\n", &int16Val, int16(74)},
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ScanfTest{"%d", "75\n", &int32Val, int32(75)},
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@ -299,12 +301,13 @@ var multiTests = []ScanfMultiTest{
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ScanfMultiTest{"%d%s", "123abc", args(&i, &s), args(123, "abc"), ""},
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// Custom scanner.
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ScanfMultiTest{"%2e%f", "eefffff", []interface{}{&x, &y}, []interface{}{Xs("ee"), Xs("fffff")}, ""},
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ScanfMultiTest{"%2e%f", "eefffff", args(&x, &y), args(Xs("ee"), Xs("fffff")), ""},
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// Errors
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ScanfMultiTest{"%t", "23 18", []interface{}{&i}, nil, "bad verb"},
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ScanfMultiTest{"%d %d %d", "23 18", []interface{}{&i, &j}, []interface{}{23, 18}, "too few operands"},
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ScanfMultiTest{"%d %d", "23 18 27", []interface{}{&i, &j, &k}, []interface{}{23, 18}, "too many operands"},
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ScanfMultiTest{"%t", "23 18", args(&i), nil, "bad verb"},
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ScanfMultiTest{"%d %d %d", "23 18", args(&i, &j), args(23, 18), "too few operands"},
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ScanfMultiTest{"%d %d", "23 18 27", args(&i, &j, &k), args(23, 18), "too many operands"},
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ScanfMultiTest{"%c", "\u0100", args(&int8Val), nil, "overflow"},
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}
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func testScan(t *testing.T, scan func(r io.Reader, a ...interface{}) (int, os.Error)) {
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