From 56e74239d6b34df8f30ef046f0b0ff4ff0866a71 Mon Sep 17 00:00:00 2001 From: =Corey Hulen Date: Sun, 14 Jun 2015 23:53:32 -0800 Subject: first commit --- .../_workspace/src/gopkg.in/bufio.v1/.travis.yml | 11 + Godeps/_workspace/src/gopkg.in/bufio.v1/LICENSE | 27 + Godeps/_workspace/src/gopkg.in/bufio.v1/Makefile | 2 + Godeps/_workspace/src/gopkg.in/bufio.v1/buffer.go | 413 ++++++ .../src/gopkg.in/bufio.v1/buffer_test.go | 527 ++++++++ Godeps/_workspace/src/gopkg.in/bufio.v1/bufio.go | 728 ++++++++++ .../_workspace/src/gopkg.in/bufio.v1/bufio_test.go | 1418 ++++++++++++++++++++ .../src/gopkg.in/bufio.v1/export_test.go | 9 + 8 files changed, 3135 insertions(+) create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/.travis.yml create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/LICENSE create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/Makefile create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/buffer.go create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/buffer_test.go create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/bufio.go create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/bufio_test.go create mode 100644 Godeps/_workspace/src/gopkg.in/bufio.v1/export_test.go (limited to 'Godeps/_workspace/src/gopkg.in/bufio.v1') diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/.travis.yml b/Godeps/_workspace/src/gopkg.in/bufio.v1/.travis.yml new file mode 100644 index 000000000..ccca6bb4a --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/.travis.yml @@ -0,0 +1,11 @@ +language: go + +go: + - 1.0 + - 1.1 + - 1.2 + - tip + +install: + - go get launchpad.net/gocheck + - go get gopkg.in/bufio.v1 diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/LICENSE b/Godeps/_workspace/src/gopkg.in/bufio.v1/LICENSE new file mode 100644 index 000000000..07a316cbf --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2013 The bufio Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/Makefile b/Godeps/_workspace/src/gopkg.in/bufio.v1/Makefile new file mode 100644 index 000000000..038ed47e9 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/Makefile @@ -0,0 +1,2 @@ +all: + go test gopkg.in/bufio.v1 diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer.go b/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer.go new file mode 100644 index 000000000..8b915605b --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer.go @@ -0,0 +1,413 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package bufio + +// Simple byte buffer for marshaling data. + +import ( + "bytes" + "errors" + "io" + "unicode/utf8" +) + +// A Buffer is a variable-sized buffer of bytes with Read and Write methods. +// The zero value for Buffer is an empty buffer ready to use. +type Buffer struct { + buf []byte // contents are the bytes buf[off : len(buf)] + off int // read at &buf[off], write at &buf[len(buf)] + runeBytes [utf8.UTFMax]byte // avoid allocation of slice on each WriteByte or Rune + bootstrap [64]byte // memory to hold first slice; helps small buffers (Printf) avoid allocation. + lastRead readOp // last read operation, so that Unread* can work correctly. +} + +// The readOp constants describe the last action performed on +// the buffer, so that UnreadRune and UnreadByte can +// check for invalid usage. +type readOp int + +const ( + opInvalid readOp = iota // Non-read operation. + opReadRune // Read rune. + opRead // Any other read operation. +) + +// ErrTooLarge is passed to panic if memory cannot be allocated to store data in a buffer. +var ErrTooLarge = errors.New("bytes.Buffer: too large") + +// Bytes returns a slice of the contents of the unread portion of the buffer; +// len(b.Bytes()) == b.Len(). If the caller changes the contents of the +// returned slice, the contents of the buffer will change provided there +// are no intervening method calls on the Buffer. +func (b *Buffer) Bytes() []byte { return b.buf[b.off:] } + +// String returns the contents of the unread portion of the buffer +// as a string. If the Buffer is a nil pointer, it returns "". +func (b *Buffer) String() string { + if b == nil { + // Special case, useful in debugging. + return "" + } + return string(b.buf[b.off:]) +} + +// Len returns the number of bytes of the unread portion of the buffer; +// b.Len() == len(b.Bytes()). +func (b *Buffer) Len() int { return len(b.buf) - b.off } + +// Truncate discards all but the first n unread bytes from the buffer. +// It panics if n is negative or greater than the length of the buffer. +func (b *Buffer) Truncate(n int) { + b.lastRead = opInvalid + switch { + case n < 0 || n > b.Len(): + panic("bytes.Buffer: truncation out of range") + case n == 0: + // Reuse buffer space. + b.off = 0 + } + b.buf = b.buf[0 : b.off+n] +} + +// Reset resets the buffer so it has no content. +// b.Reset() is the same as b.Truncate(0). +func (b *Buffer) Reset() { b.Truncate(0) } + +// grow grows the buffer to guarantee space for n more bytes. +// It returns the index where bytes should be written. +// If the buffer can't grow it will panic with ErrTooLarge. +func (b *Buffer) grow(n int) int { + m := b.Len() + // If buffer is empty, reset to recover space. + if m == 0 && b.off != 0 { + b.Truncate(0) + } + if len(b.buf)+n > cap(b.buf) { + var buf []byte + if b.buf == nil && n <= len(b.bootstrap) { + buf = b.bootstrap[0:] + } else if m+n <= cap(b.buf)/2 { + // We can slide things down instead of allocating a new + // slice. We only need m+n <= cap(b.buf) to slide, but + // we instead let capacity get twice as large so we + // don't spend all our time copying. + copy(b.buf[:], b.buf[b.off:]) + buf = b.buf[:m] + } else { + // not enough space anywhere + buf = makeSlice(2*cap(b.buf) + n) + copy(buf, b.buf[b.off:]) + } + b.buf = buf + b.off = 0 + } + b.buf = b.buf[0 : b.off+m+n] + return b.off + m +} + +// Grow grows the buffer's capacity, if necessary, to guarantee space for +// another n bytes. After Grow(n), at least n bytes can be written to the +// buffer without another allocation. +// If n is negative, Grow will panic. +// If the buffer can't grow it will panic with ErrTooLarge. +func (b *Buffer) Grow(n int) { + if n < 0 { + panic("bytes.Buffer.Grow: negative count") + } + m := b.grow(n) + b.buf = b.buf[0:m] +} + +// Write appends the contents of p to the buffer, growing the buffer as +// needed. The return value n is the length of p; err is always nil. If the +// buffer becomes too large, Write will panic with ErrTooLarge. +func (b *Buffer) Write(p []byte) (n int, err error) { + b.lastRead = opInvalid + m := b.grow(len(p)) + return copy(b.buf[m:], p), nil +} + +// WriteString appends the contents of s to the buffer, growing the buffer as +// needed. The return value n is the length of s; err is always nil. If the +// buffer becomes too large, WriteString will panic with ErrTooLarge. +func (b *Buffer) WriteString(s string) (n int, err error) { + b.lastRead = opInvalid + m := b.grow(len(s)) + return copy(b.buf[m:], s), nil +} + +// MinRead is the minimum slice size passed to a Read call by +// Buffer.ReadFrom. As long as the Buffer has at least MinRead bytes beyond +// what is required to hold the contents of r, ReadFrom will not grow the +// underlying buffer. +const MinRead = 512 + +// ReadFrom reads data from r until EOF and appends it to the buffer, growing +// the buffer as needed. The return value n is the number of bytes read. Any +// error except io.EOF encountered during the read is also returned. If the +// buffer becomes too large, ReadFrom will panic with ErrTooLarge. +func (b *Buffer) ReadFrom(r io.Reader) (n int64, err error) { + b.lastRead = opInvalid + // If buffer is empty, reset to recover space. + if b.off >= len(b.buf) { + b.Truncate(0) + } + for { + if free := cap(b.buf) - len(b.buf); free < MinRead { + // not enough space at end + newBuf := b.buf + if b.off+free < MinRead { + // not enough space using beginning of buffer; + // double buffer capacity + newBuf = makeSlice(2*cap(b.buf) + MinRead) + } + copy(newBuf, b.buf[b.off:]) + b.buf = newBuf[:len(b.buf)-b.off] + b.off = 0 + } + m, e := r.Read(b.buf[len(b.buf):cap(b.buf)]) + b.buf = b.buf[0 : len(b.buf)+m] + n += int64(m) + if e == io.EOF { + break + } + if e != nil { + return n, e + } + } + return n, nil // err is EOF, so return nil explicitly +} + +// makeSlice allocates a slice of size n. If the allocation fails, it panics +// with ErrTooLarge. +func makeSlice(n int) []byte { + // If the make fails, give a known error. + defer func() { + if recover() != nil { + panic(ErrTooLarge) + } + }() + return make([]byte, n) +} + +// WriteTo writes data to w until the buffer is drained or an error occurs. +// The return value n is the number of bytes written; it always fits into an +// int, but it is int64 to match the io.WriterTo interface. Any error +// encountered during the write is also returned. +func (b *Buffer) WriteTo(w io.Writer) (n int64, err error) { + b.lastRead = opInvalid + if b.off < len(b.buf) { + nBytes := b.Len() + m, e := w.Write(b.buf[b.off:]) + if m > nBytes { + panic("bytes.Buffer.WriteTo: invalid Write count") + } + b.off += m + n = int64(m) + if e != nil { + return n, e + } + // all bytes should have been written, by definition of + // Write method in io.Writer + if m != nBytes { + return n, io.ErrShortWrite + } + } + // Buffer is now empty; reset. + b.Truncate(0) + return +} + +// WriteByte appends the byte c to the buffer, growing the buffer as needed. +// The returned error is always nil, but is included to match bufio.Writer's +// WriteByte. If the buffer becomes too large, WriteByte will panic with +// ErrTooLarge. +func (b *Buffer) WriteByte(c byte) error { + b.lastRead = opInvalid + m := b.grow(1) + b.buf[m] = c + return nil +} + +// WriteRune appends the UTF-8 encoding of Unicode code point r to the +// buffer, returning its length and an error, which is always nil but is +// included to match bufio.Writer's WriteRune. The buffer is grown as needed; +// if it becomes too large, WriteRune will panic with ErrTooLarge. +func (b *Buffer) WriteRune(r rune) (n int, err error) { + if r < utf8.RuneSelf { + b.WriteByte(byte(r)) + return 1, nil + } + n = utf8.EncodeRune(b.runeBytes[0:], r) + b.Write(b.runeBytes[0:n]) + return n, nil +} + +// Read reads the next len(p) bytes from the buffer or until the buffer +// is drained. The return value n is the number of bytes read. If the +// buffer has no data to return, err is io.EOF (unless len(p) is zero); +// otherwise it is nil. +func (b *Buffer) Read(p []byte) (n int, err error) { + b.lastRead = opInvalid + if b.off >= len(b.buf) { + // Buffer is empty, reset to recover space. + b.Truncate(0) + if len(p) == 0 { + return + } + return 0, io.EOF + } + n = copy(p, b.buf[b.off:]) + b.off += n + if n > 0 { + b.lastRead = opRead + } + return +} + +// Next returns a slice containing the next n bytes from the buffer, +// advancing the buffer as if the bytes had been returned by Read. +// If there are fewer than n bytes in the buffer, Next returns the entire buffer. +// The slice is only valid until the next call to a read or write method. +func (b *Buffer) Next(n int) []byte { + b.lastRead = opInvalid + m := b.Len() + if n > m { + n = m + } + data := b.buf[b.off : b.off+n] + b.off += n + if n > 0 { + b.lastRead = opRead + } + return data +} + +// ReadByte reads and returns the next byte from the buffer. +// If no byte is available, it returns error io.EOF. +func (b *Buffer) ReadByte() (c byte, err error) { + b.lastRead = opInvalid + if b.off >= len(b.buf) { + // Buffer is empty, reset to recover space. + b.Truncate(0) + return 0, io.EOF + } + c = b.buf[b.off] + b.off++ + b.lastRead = opRead + return c, nil +} + +// ReadRune reads and returns the next UTF-8-encoded +// Unicode code point from the buffer. +// If no bytes are available, the error returned is io.EOF. +// If the bytes are an erroneous UTF-8 encoding, it +// consumes one byte and returns U+FFFD, 1. +func (b *Buffer) ReadRune() (r rune, size int, err error) { + b.lastRead = opInvalid + if b.off >= len(b.buf) { + // Buffer is empty, reset to recover space. + b.Truncate(0) + return 0, 0, io.EOF + } + b.lastRead = opReadRune + c := b.buf[b.off] + if c < utf8.RuneSelf { + b.off++ + return rune(c), 1, nil + } + r, n := utf8.DecodeRune(b.buf[b.off:]) + b.off += n + return r, n, nil +} + +// UnreadRune unreads the last rune returned by ReadRune. +// If the most recent read or write operation on the buffer was +// not a ReadRune, UnreadRune returns an error. (In this regard +// it is stricter than UnreadByte, which will unread the last byte +// from any read operation.) +func (b *Buffer) UnreadRune() error { + if b.lastRead != opReadRune { + return errors.New("bytes.Buffer: UnreadRune: previous operation was not ReadRune") + } + b.lastRead = opInvalid + if b.off > 0 { + _, n := utf8.DecodeLastRune(b.buf[0:b.off]) + b.off -= n + } + return nil +} + +// UnreadByte unreads the last byte returned by the most recent +// read operation. If write has happened since the last read, UnreadByte +// returns an error. +func (b *Buffer) UnreadByte() error { + if b.lastRead != opReadRune && b.lastRead != opRead { + return errors.New("bytes.Buffer: UnreadByte: previous operation was not a read") + } + b.lastRead = opInvalid + if b.off > 0 { + b.off-- + } + return nil +} + +// ReadBytes reads until the first occurrence of delim in the input, +// returning a slice containing the data up to and including the delimiter. +// If ReadBytes encounters an error before finding a delimiter, +// it returns the data read before the error and the error itself (often io.EOF). +// ReadBytes returns err != nil if and only if the returned data does not end in +// delim. +func (b *Buffer) ReadBytes(delim byte) (line []byte, err error) { + slice, err := b.readSlice(delim) + // return a copy of slice. The buffer's backing array may + // be overwritten by later calls. + line = append(line, slice...) + return +} + +// readSlice is like ReadBytes but returns a reference to internal buffer data. +func (b *Buffer) readSlice(delim byte) (line []byte, err error) { + i := bytes.IndexByte(b.buf[b.off:], delim) + end := b.off + i + 1 + if i < 0 { + end = len(b.buf) + err = io.EOF + } + line = b.buf[b.off:end] + b.off = end + b.lastRead = opRead + return line, err +} + +// ReadString reads until the first occurrence of delim in the input, +// returning a string containing the data up to and including the delimiter. +// If ReadString encounters an error before finding a delimiter, +// it returns the data read before the error and the error itself (often io.EOF). +// ReadString returns err != nil if and only if the returned data does not end +// in delim. +func (b *Buffer) ReadString(delim byte) (line string, err error) { + slice, err := b.readSlice(delim) + return string(slice), err +} + +// NewBuffer creates and initializes a new Buffer using buf as its initial +// contents. It is intended to prepare a Buffer to read existing data. It +// can also be used to size the internal buffer for writing. To do that, +// buf should have the desired capacity but a length of zero. +// +// In most cases, new(Buffer) (or just declaring a Buffer variable) is +// sufficient to initialize a Buffer. +func NewBuffer(buf []byte) *Buffer { return &Buffer{buf: buf} } + +// NewBufferString creates and initializes a new Buffer using string s as its +// initial contents. It is intended to prepare a buffer to read an existing +// string. +// +// In most cases, new(Buffer) (or just declaring a Buffer variable) is +// sufficient to initialize a Buffer. +func NewBufferString(s string) *Buffer { + return &Buffer{buf: []byte(s)} +} diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer_test.go b/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer_test.go new file mode 100644 index 000000000..ca1ac2105 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/buffer_test.go @@ -0,0 +1,527 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package bufio + +import ( + "bytes" + "io" + "math/rand" + "runtime" + "testing" + "unicode/utf8" +) + +const N = 10000 // make this bigger for a larger (and slower) test +var data string // test data for write tests +var testBytes []byte // test data; same as data but as a slice. + +func init() { + testBytes = make([]byte, N) + for i := 0; i < N; i++ { + testBytes[i] = 'a' + byte(i%26) + } + data = string(testBytes) +} + +// Verify that contents of buf match the string s. +func check(t *testing.T, testname string, buf *Buffer, s string) { + bytes := buf.Bytes() + str := buf.String() + if buf.Len() != len(bytes) { + t.Errorf("%s: buf.Len() == %d, len(buf.Bytes()) == %d", testname, buf.Len(), len(bytes)) + } + + if buf.Len() != len(str) { + t.Errorf("%s: buf.Len() == %d, len(buf.String()) == %d", testname, buf.Len(), len(str)) + } + + if buf.Len() != len(s) { + t.Errorf("%s: buf.Len() == %d, len(s) == %d", testname, buf.Len(), len(s)) + } + + if string(bytes) != s { + t.Errorf("%s: string(buf.Bytes()) == %q, s == %q", testname, string(bytes), s) + } +} + +// Fill buf through n writes of string fus. +// The initial contents of buf corresponds to the string s; +// the result is the final contents of buf returned as a string. +func fillString(t *testing.T, testname string, buf *Buffer, s string, n int, fus string) string { + check(t, testname+" (fill 1)", buf, s) + for ; n > 0; n-- { + m, err := buf.WriteString(fus) + if m != len(fus) { + t.Errorf(testname+" (fill 2): m == %d, expected %d", m, len(fus)) + } + if err != nil { + t.Errorf(testname+" (fill 3): err should always be nil, found err == %s", err) + } + s += fus + check(t, testname+" (fill 4)", buf, s) + } + return s +} + +// Fill buf through n writes of byte slice fub. +// The initial contents of buf corresponds to the string s; +// the result is the final contents of buf returned as a string. +func fillBytes(t *testing.T, testname string, buf *Buffer, s string, n int, fub []byte) string { + check(t, testname+" (fill 1)", buf, s) + for ; n > 0; n-- { + m, err := buf.Write(fub) + if m != len(fub) { + t.Errorf(testname+" (fill 2): m == %d, expected %d", m, len(fub)) + } + if err != nil { + t.Errorf(testname+" (fill 3): err should always be nil, found err == %s", err) + } + s += string(fub) + check(t, testname+" (fill 4)", buf, s) + } + return s +} + +func TestNewBuffer(t *testing.T) { + buf := NewBuffer(testBytes) + check(t, "NewBuffer", buf, data) +} + +func TestNewBufferString(t *testing.T) { + buf := NewBufferString(data) + check(t, "NewBufferString", buf, data) +} + +// Empty buf through repeated reads into fub. +// The initial contents of buf corresponds to the string s. +func empty(t *testing.T, testname string, buf *Buffer, s string, fub []byte) { + check(t, testname+" (empty 1)", buf, s) + + for { + n, err := buf.Read(fub) + if n == 0 { + break + } + if err != nil { + t.Errorf(testname+" (empty 2): err should always be nil, found err == %s", err) + } + s = s[n:] + check(t, testname+" (empty 3)", buf, s) + } + + check(t, testname+" (empty 4)", buf, "") +} + +func TestBasicOperations(t *testing.T) { + var buf Buffer + + for i := 0; i < 5; i++ { + check(t, "TestBasicOperations (1)", &buf, "") + + buf.Reset() + check(t, "TestBasicOperations (2)", &buf, "") + + buf.Truncate(0) + check(t, "TestBasicOperations (3)", &buf, "") + + n, err := buf.Write([]byte(data[0:1])) + if n != 1 { + t.Errorf("wrote 1 byte, but n == %d", n) + } + if err != nil { + t.Errorf("err should always be nil, but err == %s", err) + } + check(t, "TestBasicOperations (4)", &buf, "a") + + buf.WriteByte(data[1]) + check(t, "TestBasicOperations (5)", &buf, "ab") + + n, err = buf.Write([]byte(data[2:26])) + if n != 24 { + t.Errorf("wrote 25 bytes, but n == %d", n) + } + check(t, "TestBasicOperations (6)", &buf, string(data[0:26])) + + buf.Truncate(26) + check(t, "TestBasicOperations (7)", &buf, string(data[0:26])) + + buf.Truncate(20) + check(t, "TestBasicOperations (8)", &buf, string(data[0:20])) + + empty(t, "TestBasicOperations (9)", &buf, string(data[0:20]), make([]byte, 5)) + empty(t, "TestBasicOperations (10)", &buf, "", make([]byte, 100)) + + buf.WriteByte(data[1]) + c, err := buf.ReadByte() + if err != nil { + t.Error("ReadByte unexpected eof") + } + if c != data[1] { + t.Errorf("ReadByte wrong value c=%v", c) + } + c, err = buf.ReadByte() + if err == nil { + t.Error("ReadByte unexpected not eof") + } + } +} + +func TestLargeStringWrites(t *testing.T) { + var buf Buffer + limit := 30 + if testing.Short() { + limit = 9 + } + for i := 3; i < limit; i += 3 { + s := fillString(t, "TestLargeWrites (1)", &buf, "", 5, data) + empty(t, "TestLargeStringWrites (2)", &buf, s, make([]byte, len(data)/i)) + } + check(t, "TestLargeStringWrites (3)", &buf, "") +} + +func TestLargeByteWrites(t *testing.T) { + var buf Buffer + limit := 30 + if testing.Short() { + limit = 9 + } + for i := 3; i < limit; i += 3 { + s := fillBytes(t, "TestLargeWrites (1)", &buf, "", 5, testBytes) + empty(t, "TestLargeByteWrites (2)", &buf, s, make([]byte, len(data)/i)) + } + check(t, "TestLargeByteWrites (3)", &buf, "") +} + +func TestLargeStringReads(t *testing.T) { + var buf Buffer + for i := 3; i < 30; i += 3 { + s := fillString(t, "TestLargeReads (1)", &buf, "", 5, data[0:len(data)/i]) + empty(t, "TestLargeReads (2)", &buf, s, make([]byte, len(data))) + } + check(t, "TestLargeStringReads (3)", &buf, "") +} + +func TestLargeByteReads(t *testing.T) { + var buf Buffer + for i := 3; i < 30; i += 3 { + s := fillBytes(t, "TestLargeReads (1)", &buf, "", 5, testBytes[0:len(testBytes)/i]) + empty(t, "TestLargeReads (2)", &buf, s, make([]byte, len(data))) + } + check(t, "TestLargeByteReads (3)", &buf, "") +} + +func TestMixedReadsAndWrites(t *testing.T) { + var buf Buffer + s := "" + for i := 0; i < 50; i++ { + wlen := rand.Intn(len(data)) + if i%2 == 0 { + s = fillString(t, "TestMixedReadsAndWrites (1)", &buf, s, 1, data[0:wlen]) + } else { + s = fillBytes(t, "TestMixedReadsAndWrites (1)", &buf, s, 1, testBytes[0:wlen]) + } + + rlen := rand.Intn(len(data)) + fub := make([]byte, rlen) + n, _ := buf.Read(fub) + s = s[n:] + } + empty(t, "TestMixedReadsAndWrites (2)", &buf, s, make([]byte, buf.Len())) +} + +func TestNil(t *testing.T) { + var b *Buffer + if b.String() != "" { + t.Errorf("expected ; got %q", b.String()) + } +} + +func TestReadFrom(t *testing.T) { + var buf Buffer + for i := 3; i < 30; i += 3 { + s := fillBytes(t, "TestReadFrom (1)", &buf, "", 5, testBytes[0:len(testBytes)/i]) + var b Buffer + b.ReadFrom(&buf) + empty(t, "TestReadFrom (2)", &b, s, make([]byte, len(data))) + } +} + +func TestWriteTo(t *testing.T) { + var buf Buffer + for i := 3; i < 30; i += 3 { + s := fillBytes(t, "TestWriteTo (1)", &buf, "", 5, testBytes[0:len(testBytes)/i]) + var b Buffer + buf.WriteTo(&b) + empty(t, "TestWriteTo (2)", &b, s, make([]byte, len(data))) + } +} + +func TestRuneIO(t *testing.T) { + const NRune = 1000 + // Built a test slice while we write the data + b := make([]byte, utf8.UTFMax*NRune) + var buf Buffer + n := 0 + for r := rune(0); r < NRune; r++ { + size := utf8.EncodeRune(b[n:], r) + nbytes, err := buf.WriteRune(r) + if err != nil { + t.Fatalf("WriteRune(%U) error: %s", r, err) + } + if nbytes != size { + t.Fatalf("WriteRune(%U) expected %d, got %d", r, size, nbytes) + } + n += size + } + b = b[0:n] + + // Check the resulting bytes + if !bytes.Equal(buf.Bytes(), b) { + t.Fatalf("incorrect result from WriteRune: %q not %q", buf.Bytes(), b) + } + + p := make([]byte, utf8.UTFMax) + // Read it back with ReadRune + for r := rune(0); r < NRune; r++ { + size := utf8.EncodeRune(p, r) + nr, nbytes, err := buf.ReadRune() + if nr != r || nbytes != size || err != nil { + t.Fatalf("ReadRune(%U) got %U,%d not %U,%d (err=%s)", r, nr, nbytes, r, size, err) + } + } + + // Check that UnreadRune works + buf.Reset() + buf.Write(b) + for r := rune(0); r < NRune; r++ { + r1, size, _ := buf.ReadRune() + if err := buf.UnreadRune(); err != nil { + t.Fatalf("UnreadRune(%U) got error %q", r, err) + } + r2, nbytes, err := buf.ReadRune() + if r1 != r2 || r1 != r || nbytes != size || err != nil { + t.Fatalf("ReadRune(%U) after UnreadRune got %U,%d not %U,%d (err=%s)", r, r2, nbytes, r, size, err) + } + } +} + +func TestNext(t *testing.T) { + b := []byte{0, 1, 2, 3, 4} + tmp := make([]byte, 5) + for i := 0; i <= 5; i++ { + for j := i; j <= 5; j++ { + for k := 0; k <= 6; k++ { + // 0 <= i <= j <= 5; 0 <= k <= 6 + // Check that if we start with a buffer + // of length j at offset i and ask for + // Next(k), we get the right bytes. + buf := NewBuffer(b[0:j]) + n, _ := buf.Read(tmp[0:i]) + if n != i { + t.Fatalf("Read %d returned %d", i, n) + } + bb := buf.Next(k) + want := k + if want > j-i { + want = j - i + } + if len(bb) != want { + t.Fatalf("in %d,%d: len(Next(%d)) == %d", i, j, k, len(bb)) + } + for l, v := range bb { + if v != byte(l+i) { + t.Fatalf("in %d,%d: Next(%d)[%d] = %d, want %d", i, j, k, l, v, l+i) + } + } + } + } + } +} + +var readBytesTests = []struct { + buffer string + delim byte + expected []string + err error +}{ + {"", 0, []string{""}, io.EOF}, + {"a\x00", 0, []string{"a\x00"}, nil}, + {"abbbaaaba", 'b', []string{"ab", "b", "b", "aaab"}, nil}, + {"hello\x01world", 1, []string{"hello\x01"}, nil}, + {"foo\nbar", 0, []string{"foo\nbar"}, io.EOF}, + {"alpha\nbeta\ngamma\n", '\n', []string{"alpha\n", "beta\n", "gamma\n"}, nil}, + {"alpha\nbeta\ngamma", '\n', []string{"alpha\n", "beta\n", "gamma"}, io.EOF}, +} + +func TestReadBytes(t *testing.T) { + for _, test := range readBytesTests { + buf := NewBufferString(test.buffer) + var err error + for _, expected := range test.expected { + var bytes []byte + bytes, err = buf.ReadBytes(test.delim) + if string(bytes) != expected { + t.Errorf("expected %q, got %q", expected, bytes) + } + if err != nil { + break + } + } + if err != test.err { + t.Errorf("expected error %v, got %v", test.err, err) + } + } +} + +func TestReadString(t *testing.T) { + for _, test := range readBytesTests { + buf := NewBufferString(test.buffer) + var err error + for _, expected := range test.expected { + var s string + s, err = buf.ReadString(test.delim) + if s != expected { + t.Errorf("expected %q, got %q", expected, s) + } + if err != nil { + break + } + } + if err != test.err { + t.Errorf("expected error %v, got %v", test.err, err) + } + } +} + +func BenchmarkReadString(b *testing.B) { + const n = 32 << 10 + + data := make([]byte, n) + data[n-1] = 'x' + b.SetBytes(int64(n)) + for i := 0; i < b.N; i++ { + buf := NewBuffer(data) + _, err := buf.ReadString('x') + if err != nil { + b.Fatal(err) + } + } +} + +func TestGrow(t *testing.T) { + x := []byte{'x'} + y := []byte{'y'} + tmp := make([]byte, 72) + for _, startLen := range []int{0, 100, 1000, 10000, 100000} { + xBytes := bytes.Repeat(x, startLen) + for _, growLen := range []int{0, 100, 1000, 10000, 100000} { + buf := NewBuffer(xBytes) + // If we read, this affects buf.off, which is good to test. + readBytes, _ := buf.Read(tmp) + buf.Grow(growLen) + yBytes := bytes.Repeat(y, growLen) + // Check no allocation occurs in write, as long as we're single-threaded. + var m1, m2 runtime.MemStats + runtime.ReadMemStats(&m1) + buf.Write(yBytes) + runtime.ReadMemStats(&m2) + if runtime.GOMAXPROCS(-1) == 1 && m1.Mallocs != m2.Mallocs { + t.Errorf("allocation occurred during write") + } + // Check that buffer has correct data. + if !bytes.Equal(buf.Bytes()[0:startLen-readBytes], xBytes[readBytes:]) { + t.Errorf("bad initial data at %d %d", startLen, growLen) + } + if !bytes.Equal(buf.Bytes()[startLen-readBytes:startLen-readBytes+growLen], yBytes) { + t.Errorf("bad written data at %d %d", startLen, growLen) + } + } + } +} + +// Was a bug: used to give EOF reading empty slice at EOF. +func TestReadEmptyAtEOF(t *testing.T) { + b := new(Buffer) + slice := make([]byte, 0) + n, err := b.Read(slice) + if err != nil { + t.Errorf("read error: %v", err) + } + if n != 0 { + t.Errorf("wrong count; got %d want 0", n) + } +} + +func TestBufferUnreadByte(t *testing.T) { + b := new(Buffer) + b.WriteString("abcdefghijklmnopqrstuvwxyz") + + _, err := b.ReadBytes('m') + if err != nil { + t.Fatalf("ReadBytes: %v", err) + } + + err = b.UnreadByte() + if err != nil { + t.Fatalf("UnreadByte: %v", err) + } + c, err := b.ReadByte() + if err != nil { + t.Fatalf("ReadByte: %v", err) + } + if c != 'm' { + t.Errorf("ReadByte = %q; want %q", c, 'm') + } +} + +// Tests that we occasionally compact. Issue 5154. +func TestBufferGrowth(t *testing.T) { + var b Buffer + buf := make([]byte, 1024) + b.Write(buf[0:1]) + var cap0 int + for i := 0; i < 5<<10; i++ { + b.Write(buf) + b.Read(buf) + if i == 0 { + cap0 = b.Cap() + } + } + cap1 := b.Cap() + // (*Buffer).grow allows for 2x capacity slop before sliding, + // so set our error threshold at 3x. + if cap1 > cap0*3 { + t.Errorf("buffer cap = %d; too big (grew from %d)", cap1, cap0) + } +} + +// From Issue 5154. +func BenchmarkBufferNotEmptyWriteRead(b *testing.B) { + buf := make([]byte, 1024) + for i := 0; i < b.N; i++ { + var b Buffer + b.Write(buf[0:1]) + for i := 0; i < 5<<10; i++ { + b.Write(buf) + b.Read(buf) + } + } +} + +// Check that we don't compact too often. From Issue 5154. +func BenchmarkBufferFullSmallReads(b *testing.B) { + buf := make([]byte, 1024) + for i := 0; i < b.N; i++ { + var b Buffer + b.Write(buf) + for b.Len()+20 < b.Cap() { + b.Write(buf[:10]) + } + for i := 0; i < 5<<10; i++ { + b.Read(buf[:1]) + b.Write(buf[:1]) + } + } +} diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio.go b/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio.go new file mode 100644 index 000000000..8f5cdc084 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio.go @@ -0,0 +1,728 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer +// object, creating another object (Reader or Writer) that also implements +// the interface but provides buffering and some help for textual I/O. +package bufio + +import ( + "bytes" + "errors" + "io" + "unicode/utf8" +) + +const ( + defaultBufSize = 4096 +) + +var ( + ErrInvalidUnreadByte = errors.New("bufio: invalid use of UnreadByte") + ErrInvalidUnreadRune = errors.New("bufio: invalid use of UnreadRune") + ErrBufferFull = errors.New("bufio: buffer full") + ErrNegativeCount = errors.New("bufio: negative count") +) + +// Buffered input. + +// Reader implements buffering for an io.Reader object. +type Reader struct { + buf []byte + rd io.Reader + r, w int + err error + lastByte int + lastRuneSize int +} + +const minReadBufferSize = 16 +const maxConsecutiveEmptyReads = 100 + +// NewReaderSize returns a new Reader whose buffer has at least the specified +// size. If the argument io.Reader is already a Reader with large enough +// size, it returns the underlying Reader. +func NewReaderSize(rd io.Reader, size int) *Reader { + // Is it already a Reader? + b, ok := rd.(*Reader) + if ok && len(b.buf) >= size { + return b + } + if size < minReadBufferSize { + size = minReadBufferSize + } + r := new(Reader) + r.reset(make([]byte, size), rd) + return r +} + +// NewReader returns a new Reader whose buffer has the default size. +func NewReader(rd io.Reader) *Reader { + return NewReaderSize(rd, defaultBufSize) +} + +// Reset discards any buffered data, resets all state, and switches +// the buffered reader to read from r. +func (b *Reader) Reset(r io.Reader) { + b.reset(b.buf, r) +} + +func (b *Reader) reset(buf []byte, r io.Reader) { + *b = Reader{ + buf: buf, + rd: r, + lastByte: -1, + lastRuneSize: -1, + } +} + +var errNegativeRead = errors.New("bufio: reader returned negative count from Read") + +// fill reads a new chunk into the buffer. +func (b *Reader) fill() { + // Slide existing data to beginning. + if b.r > 0 { + copy(b.buf, b.buf[b.r:b.w]) + b.w -= b.r + b.r = 0 + } + + if b.w >= len(b.buf) { + panic("bufio: tried to fill full buffer") + } + + // Read new data: try a limited number of times. + for i := maxConsecutiveEmptyReads; i > 0; i-- { + n, err := b.rd.Read(b.buf[b.w:]) + if n < 0 { + panic(errNegativeRead) + } + b.w += n + if err != nil { + b.err = err + return + } + if n > 0 { + return + } + } + b.err = io.ErrNoProgress +} + +func (b *Reader) readErr() error { + err := b.err + b.err = nil + return err +} + +// Peek returns the next n bytes without advancing the reader. The bytes stop +// being valid at the next read call. If Peek returns fewer than n bytes, it +// also returns an error explaining why the read is short. The error is +// ErrBufferFull if n is larger than b's buffer size. +func (b *Reader) Peek(n int) ([]byte, error) { + if n < 0 { + return nil, ErrNegativeCount + } + if n > len(b.buf) { + return nil, ErrBufferFull + } + // 0 <= n <= len(b.buf) + for b.w-b.r < n && b.err == nil { + b.fill() // b.w-b.r < len(b.buf) => buffer is not full + } + m := b.w - b.r + if m > n { + m = n + } + var err error + if m < n { + err = b.readErr() + if err == nil { + err = ErrBufferFull + } + } + return b.buf[b.r : b.r+m], err +} + +// Read reads data into p. +// It returns the number of bytes read into p. +// It calls Read at most once on the underlying Reader, +// hence n may be less than len(p). +// At EOF, the count will be zero and err will be io.EOF. +func (b *Reader) Read(p []byte) (n int, err error) { + n = len(p) + if n == 0 { + return 0, b.readErr() + } + if b.r == b.w { + if b.err != nil { + return 0, b.readErr() + } + if len(p) >= len(b.buf) { + // Large read, empty buffer. + // Read directly into p to avoid copy. + n, b.err = b.rd.Read(p) + if n < 0 { + panic(errNegativeRead) + } + if n > 0 { + b.lastByte = int(p[n-1]) + b.lastRuneSize = -1 + } + return n, b.readErr() + } + b.fill() // buffer is empty + if b.w == b.r { + return 0, b.readErr() + } + } + + if n > b.w-b.r { + n = b.w - b.r + } + copy(p[0:n], b.buf[b.r:]) + b.r += n + b.lastByte = int(b.buf[b.r-1]) + b.lastRuneSize = -1 + return n, nil +} + +// ReadByte reads and returns a single byte. +// If no byte is available, returns an error. +func (b *Reader) ReadByte() (c byte, err error) { + b.lastRuneSize = -1 + for b.r == b.w { + if b.err != nil { + return 0, b.readErr() + } + b.fill() // buffer is empty + } + c = b.buf[b.r] + b.r++ + b.lastByte = int(c) + return c, nil +} + +// UnreadByte unreads the last byte. Only the most recently read byte can be unread. +func (b *Reader) UnreadByte() error { + if b.lastByte < 0 || b.r == 0 && b.w > 0 { + return ErrInvalidUnreadByte + } + // b.r > 0 || b.w == 0 + if b.r > 0 { + b.r-- + } else { + // b.r == 0 && b.w == 0 + b.w = 1 + } + b.buf[b.r] = byte(b.lastByte) + b.lastByte = -1 + b.lastRuneSize = -1 + return nil +} + +// ReadRune reads a single UTF-8 encoded Unicode character and returns the +// rune and its size in bytes. If the encoded rune is invalid, it consumes one byte +// and returns unicode.ReplacementChar (U+FFFD) with a size of 1. +func (b *Reader) ReadRune() (r rune, size int, err error) { + for b.r+utf8.UTFMax > b.w && !utf8.FullRune(b.buf[b.r:b.w]) && b.err == nil && b.w-b.r < len(b.buf) { + b.fill() // b.w-b.r < len(buf) => buffer is not full + } + b.lastRuneSize = -1 + if b.r == b.w { + return 0, 0, b.readErr() + } + r, size = rune(b.buf[b.r]), 1 + if r >= 0x80 { + r, size = utf8.DecodeRune(b.buf[b.r:b.w]) + } + b.r += size + b.lastByte = int(b.buf[b.r-1]) + b.lastRuneSize = size + return r, size, nil +} + +// UnreadRune unreads the last rune. If the most recent read operation on +// the buffer was not a ReadRune, UnreadRune returns an error. (In this +// regard it is stricter than UnreadByte, which will unread the last byte +// from any read operation.) +func (b *Reader) UnreadRune() error { + if b.lastRuneSize < 0 || b.r < b.lastRuneSize { + return ErrInvalidUnreadRune + } + b.r -= b.lastRuneSize + b.lastByte = -1 + b.lastRuneSize = -1 + return nil +} + +// Buffered returns the number of bytes that can be read from the current buffer. +func (b *Reader) Buffered() int { return b.w - b.r } + +// ReadSlice reads until the first occurrence of delim in the input, +// returning a slice pointing at the bytes in the buffer. +// The bytes stop being valid at the next read. +// If ReadSlice encounters an error before finding a delimiter, +// it returns all the data in the buffer and the error itself (often io.EOF). +// ReadSlice fails with error ErrBufferFull if the buffer fills without a delim. +// Because the data returned from ReadSlice will be overwritten +// by the next I/O operation, most clients should use +// ReadBytes or ReadString instead. +// ReadSlice returns err != nil if and only if line does not end in delim. +func (b *Reader) ReadSlice(delim byte) (line []byte, err error) { + for { + // Search buffer. + if i := bytes.IndexByte(b.buf[b.r:b.w], delim); i >= 0 { + line = b.buf[b.r : b.r+i+1] + b.r += i + 1 + break + } + + // Pending error? + if b.err != nil { + line = b.buf[b.r:b.w] + b.r = b.w + err = b.readErr() + break + } + + // Buffer full? + if n := b.Buffered(); n >= len(b.buf) { + b.r = b.w + line = b.buf + err = ErrBufferFull + break + } + + b.fill() // buffer is not full + } + + // Handle last byte, if any. + if i := len(line) - 1; i >= 0 { + b.lastByte = int(line[i]) + } + + return +} + +// ReadN tries to read exactly n bytes. +// The bytes stop being valid at the next read call. +// If ReadN encounters an error before reading n bytes, +// it returns all the data in the buffer and the error itself (often io.EOF). +// ReadN fails with error ErrBufferFull if the buffer fills +// without reading N bytes. +// Because the data returned from ReadN will be overwritten +// by the next I/O operation, most clients should use +// ReadBytes or ReadString instead. +func (b *Reader) ReadN(n int) ([]byte, error) { + for b.Buffered() < n { + if b.err != nil { + buf := b.buf[b.r:b.w] + b.r = b.w + return buf, b.readErr() + } + + // Buffer is full? + if b.Buffered() >= len(b.buf) { + b.r = b.w + return b.buf, ErrBufferFull + } + + b.fill() + } + buf := b.buf[b.r : b.r+n] + b.r += n + return buf, nil +} + +// ReadLine is a low-level line-reading primitive. Most callers should use +// ReadBytes('\n') or ReadString('\n') instead or use a Scanner. +// +// ReadLine tries to return a single line, not including the end-of-line bytes. +// If the line was too long for the buffer then isPrefix is set and the +// beginning of the line is returned. The rest of the line will be returned +// from future calls. isPrefix will be false when returning the last fragment +// of the line. The returned buffer is only valid until the next call to +// ReadLine. ReadLine either returns a non-nil line or it returns an error, +// never both. +// +// The text returned from ReadLine does not include the line end ("\r\n" or "\n"). +// No indication or error is given if the input ends without a final line end. +// Calling UnreadByte after ReadLine will always unread the last byte read +// (possibly a character belonging to the line end) even if that byte is not +// part of the line returned by ReadLine. +func (b *Reader) ReadLine() (line []byte, isPrefix bool, err error) { + line, err = b.ReadSlice('\n') + if err == ErrBufferFull { + // Handle the case where "\r\n" straddles the buffer. + if len(line) > 0 && line[len(line)-1] == '\r' { + // Put the '\r' back on buf and drop it from line. + // Let the next call to ReadLine check for "\r\n". + if b.r == 0 { + // should be unreachable + panic("bufio: tried to rewind past start of buffer") + } + b.r-- + line = line[:len(line)-1] + } + return line, true, nil + } + + if len(line) == 0 { + if err != nil { + line = nil + } + return + } + err = nil + + if line[len(line)-1] == '\n' { + drop := 1 + if len(line) > 1 && line[len(line)-2] == '\r' { + drop = 2 + } + line = line[:len(line)-drop] + } + return +} + +// ReadBytes reads until the first occurrence of delim in the input, +// returning a slice containing the data up to and including the delimiter. +// If ReadBytes encounters an error before finding a delimiter, +// it returns the data read before the error and the error itself (often io.EOF). +// ReadBytes returns err != nil if and only if the returned data does not end in +// delim. +// For simple uses, a Scanner may be more convenient. +func (b *Reader) ReadBytes(delim byte) (line []byte, err error) { + // Use ReadSlice to look for array, + // accumulating full buffers. + var frag []byte + var full [][]byte + err = nil + + for { + var e error + frag, e = b.ReadSlice(delim) + if e == nil { // got final fragment + break + } + if e != ErrBufferFull { // unexpected error + err = e + break + } + + // Make a copy of the buffer. + buf := make([]byte, len(frag)) + copy(buf, frag) + full = append(full, buf) + } + + // Allocate new buffer to hold the full pieces and the fragment. + n := 0 + for i := range full { + n += len(full[i]) + } + n += len(frag) + + // Copy full pieces and fragment in. + buf := make([]byte, n) + n = 0 + for i := range full { + n += copy(buf[n:], full[i]) + } + copy(buf[n:], frag) + return buf, err +} + +// ReadString reads until the first occurrence of delim in the input, +// returning a string containing the data up to and including the delimiter. +// If ReadString encounters an error before finding a delimiter, +// it returns the data read before the error and the error itself (often io.EOF). +// ReadString returns err != nil if and only if the returned data does not end in +// delim. +// For simple uses, a Scanner may be more convenient. +func (b *Reader) ReadString(delim byte) (line string, err error) { + bytes, err := b.ReadBytes(delim) + line = string(bytes) + return line, err +} + +// WriteTo implements io.WriterTo. +func (b *Reader) WriteTo(w io.Writer) (n int64, err error) { + n, err = b.writeBuf(w) + if err != nil { + return + } + + if r, ok := b.rd.(io.WriterTo); ok { + m, err := r.WriteTo(w) + n += m + return n, err + } + + if w, ok := w.(io.ReaderFrom); ok { + m, err := w.ReadFrom(b.rd) + n += m + return n, err + } + + if b.w-b.r < len(b.buf) { + b.fill() // buffer not full + } + + for b.r < b.w { + // b.r < b.w => buffer is not empty + m, err := b.writeBuf(w) + n += m + if err != nil { + return n, err + } + b.fill() // buffer is empty + } + + if b.err == io.EOF { + b.err = nil + } + + return n, b.readErr() +} + +// writeBuf writes the Reader's buffer to the writer. +func (b *Reader) writeBuf(w io.Writer) (int64, error) { + n, err := w.Write(b.buf[b.r:b.w]) + if n < b.r-b.w { + panic(errors.New("bufio: writer did not write all data")) + } + b.r += n + return int64(n), err +} + +// buffered output + +// Writer implements buffering for an io.Writer object. +// If an error occurs writing to a Writer, no more data will be +// accepted and all subsequent writes will return the error. +// After all data has been written, the client should call the +// Flush method to guarantee all data has been forwarded to +// the underlying io.Writer. +type Writer struct { + err error + buf []byte + n int + wr io.Writer +} + +// NewWriterSize returns a new Writer whose buffer has at least the specified +// size. If the argument io.Writer is already a Writer with large enough +// size, it returns the underlying Writer. +func NewWriterSize(w io.Writer, size int) *Writer { + // Is it already a Writer? + b, ok := w.(*Writer) + if ok && len(b.buf) >= size { + return b + } + if size <= 0 { + size = defaultBufSize + } + return &Writer{ + buf: make([]byte, size), + wr: w, + } +} + +// NewWriter returns a new Writer whose buffer has the default size. +func NewWriter(w io.Writer) *Writer { + return NewWriterSize(w, defaultBufSize) +} + +// Reset discards any unflushed buffered data, clears any error, and +// resets b to write its output to w. +func (b *Writer) Reset(w io.Writer) { + b.err = nil + b.n = 0 + b.wr = w +} + +// Flush writes any buffered data to the underlying io.Writer. +func (b *Writer) Flush() error { + err := b.flush() + return err +} + +func (b *Writer) flush() error { + if b.err != nil { + return b.err + } + if b.n == 0 { + return nil + } + n, err := b.wr.Write(b.buf[0:b.n]) + if n < b.n && err == nil { + err = io.ErrShortWrite + } + if err != nil { + if n > 0 && n < b.n { + copy(b.buf[0:b.n-n], b.buf[n:b.n]) + } + b.n -= n + b.err = err + return err + } + b.n = 0 + return nil +} + +// Available returns how many bytes are unused in the buffer. +func (b *Writer) Available() int { return len(b.buf) - b.n } + +// Buffered returns the number of bytes that have been written into the current buffer. +func (b *Writer) Buffered() int { return b.n } + +// Write writes the contents of p into the buffer. +// It returns the number of bytes written. +// If nn < len(p), it also returns an error explaining +// why the write is short. +func (b *Writer) Write(p []byte) (nn int, err error) { + for len(p) > b.Available() && b.err == nil { + var n int + if b.Buffered() == 0 { + // Large write, empty buffer. + // Write directly from p to avoid copy. + n, b.err = b.wr.Write(p) + } else { + n = copy(b.buf[b.n:], p) + b.n += n + b.flush() + } + nn += n + p = p[n:] + } + if b.err != nil { + return nn, b.err + } + n := copy(b.buf[b.n:], p) + b.n += n + nn += n + return nn, nil +} + +// WriteByte writes a single byte. +func (b *Writer) WriteByte(c byte) error { + if b.err != nil { + return b.err + } + if b.Available() <= 0 && b.flush() != nil { + return b.err + } + b.buf[b.n] = c + b.n++ + return nil +} + +// WriteRune writes a single Unicode code point, returning +// the number of bytes written and any error. +func (b *Writer) WriteRune(r rune) (size int, err error) { + if r < utf8.RuneSelf { + err = b.WriteByte(byte(r)) + if err != nil { + return 0, err + } + return 1, nil + } + if b.err != nil { + return 0, b.err + } + n := b.Available() + if n < utf8.UTFMax { + if b.flush(); b.err != nil { + return 0, b.err + } + n = b.Available() + if n < utf8.UTFMax { + // Can only happen if buffer is silly small. + return b.WriteString(string(r)) + } + } + size = utf8.EncodeRune(b.buf[b.n:], r) + b.n += size + return size, nil +} + +// WriteString writes a string. +// It returns the number of bytes written. +// If the count is less than len(s), it also returns an error explaining +// why the write is short. +func (b *Writer) WriteString(s string) (int, error) { + nn := 0 + for len(s) > b.Available() && b.err == nil { + n := copy(b.buf[b.n:], s) + b.n += n + nn += n + s = s[n:] + b.flush() + } + if b.err != nil { + return nn, b.err + } + n := copy(b.buf[b.n:], s) + b.n += n + nn += n + return nn, nil +} + +// ReadFrom implements io.ReaderFrom. +func (b *Writer) ReadFrom(r io.Reader) (n int64, err error) { + if b.Buffered() == 0 { + if w, ok := b.wr.(io.ReaderFrom); ok { + return w.ReadFrom(r) + } + } + var m int + for { + if b.Available() == 0 { + if err1 := b.flush(); err1 != nil { + return n, err1 + } + } + nr := 0 + for nr < maxConsecutiveEmptyReads { + m, err = r.Read(b.buf[b.n:]) + if m != 0 || err != nil { + break + } + nr++ + } + if nr == maxConsecutiveEmptyReads { + return n, io.ErrNoProgress + } + b.n += m + n += int64(m) + if err != nil { + break + } + } + if err == io.EOF { + // If we filled the buffer exactly, flush pre-emptively. + if b.Available() == 0 { + err = b.flush() + } else { + err = nil + } + } + return n, err +} + +// buffered input and output + +// ReadWriter stores pointers to a Reader and a Writer. +// It implements io.ReadWriter. +type ReadWriter struct { + *Reader + *Writer +} + +// NewReadWriter allocates a new ReadWriter that dispatches to r and w. +func NewReadWriter(r *Reader, w *Writer) *ReadWriter { + return &ReadWriter{r, w} +} diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio_test.go b/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio_test.go new file mode 100644 index 000000000..f19d9bd28 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/bufio_test.go @@ -0,0 +1,1418 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package bufio_test + +import ( + "bytes" + "errors" + "fmt" + "io" + "io/ioutil" + "strings" + "testing" + "testing/iotest" + "time" + "unicode/utf8" + + . "gopkg.in/bufio.v1" +) + +// Reads from a reader and rot13s the result. +type rot13Reader struct { + r io.Reader +} + +func newRot13Reader(r io.Reader) *rot13Reader { + r13 := new(rot13Reader) + r13.r = r + return r13 +} + +func (r13 *rot13Reader) Read(p []byte) (int, error) { + n, err := r13.r.Read(p) + if err != nil { + return n, err + } + for i := 0; i < n; i++ { + c := p[i] | 0x20 // lowercase byte + if 'a' <= c && c <= 'm' { + p[i] += 13 + } else if 'n' <= c && c <= 'z' { + p[i] -= 13 + } + } + return n, nil +} + +// Call ReadByte to accumulate the text of a file +func readBytes(buf *Reader) string { + var b [1000]byte + nb := 0 + for { + c, err := buf.ReadByte() + if err == io.EOF { + break + } + if err == nil { + b[nb] = c + nb++ + } else if err != iotest.ErrTimeout { + panic("Data: " + err.Error()) + } + } + return string(b[0:nb]) +} + +func TestReaderSimple(t *testing.T) { + data := "hello world" + b := NewReader(strings.NewReader(data)) + if s := readBytes(b); s != "hello world" { + t.Errorf("simple hello world test failed: got %q", s) + } + + b = NewReader(newRot13Reader(strings.NewReader(data))) + if s := readBytes(b); s != "uryyb jbeyq" { + t.Errorf("rot13 hello world test failed: got %q", s) + } +} + +type readMaker struct { + name string + fn func(io.Reader) io.Reader +} + +var readMakers = []readMaker{ + {"full", func(r io.Reader) io.Reader { return r }}, + {"byte", iotest.OneByteReader}, + {"half", iotest.HalfReader}, + {"data+err", iotest.DataErrReader}, + {"timeout", iotest.TimeoutReader}, +} + +// Call ReadString (which ends up calling everything else) +// to accumulate the text of a file. +func readLines(b *Reader) string { + s := "" + for { + s1, err := b.ReadString('\n') + if err == io.EOF { + break + } + if err != nil && err != iotest.ErrTimeout { + panic("GetLines: " + err.Error()) + } + s += s1 + } + return s +} + +// Call Read to accumulate the text of a file +func reads(buf *Reader, m int) string { + var b [1000]byte + nb := 0 + for { + n, err := buf.Read(b[nb : nb+m]) + nb += n + if err == io.EOF { + break + } + } + return string(b[0:nb]) +} + +type bufReader struct { + name string + fn func(*Reader) string +} + +var bufreaders = []bufReader{ + {"1", func(b *Reader) string { return reads(b, 1) }}, + {"2", func(b *Reader) string { return reads(b, 2) }}, + {"3", func(b *Reader) string { return reads(b, 3) }}, + {"4", func(b *Reader) string { return reads(b, 4) }}, + {"5", func(b *Reader) string { return reads(b, 5) }}, + {"7", func(b *Reader) string { return reads(b, 7) }}, + {"bytes", readBytes}, + {"lines", readLines}, +} + +const minReadBufferSize = 16 + +var bufsizes = []int{ + 0, minReadBufferSize, 23, 32, 46, 64, 93, 128, 1024, 4096, +} + +func TestReader(t *testing.T) { + var texts [31]string + str := "" + all := "" + for i := 0; i < len(texts)-1; i++ { + texts[i] = str + "\n" + all += texts[i] + str += string(i%26 + 'a') + } + texts[len(texts)-1] = all + + for h := 0; h < len(texts); h++ { + text := texts[h] + for i := 0; i < len(readMakers); i++ { + for j := 0; j < len(bufreaders); j++ { + for k := 0; k < len(bufsizes); k++ { + readmaker := readMakers[i] + bufreader := bufreaders[j] + bufsize := bufsizes[k] + read := readmaker.fn(strings.NewReader(text)) + buf := NewReaderSize(read, bufsize) + s := bufreader.fn(buf) + if s != text { + t.Errorf("reader=%s fn=%s bufsize=%d want=%q got=%q", + readmaker.name, bufreader.name, bufsize, text, s) + } + } + } + } + } +} + +type zeroReader struct{} + +func (zeroReader) Read(p []byte) (int, error) { + return 0, nil +} + +func TestZeroReader(t *testing.T) { + var z zeroReader + r := NewReader(z) + + c := make(chan error) + go func() { + _, err := r.ReadByte() + c <- err + }() + + select { + case err := <-c: + if err == nil { + t.Error("error expected") + } else if err != io.ErrNoProgress { + t.Error("unexpected error:", err) + } + case <-time.After(time.Second): + t.Error("test timed out (endless loop in ReadByte?)") + } +} + +// A StringReader delivers its data one string segment at a time via Read. +type StringReader struct { + data []string + step int +} + +func (r *StringReader) Read(p []byte) (n int, err error) { + if r.step < len(r.data) { + s := r.data[r.step] + n = copy(p, s) + r.step++ + } else { + err = io.EOF + } + return +} + +func readRuneSegments(t *testing.T, segments []string) { + got := "" + want := strings.Join(segments, "") + r := NewReader(&StringReader{data: segments}) + for { + r, _, err := r.ReadRune() + if err != nil { + if err != io.EOF { + return + } + break + } + got += string(r) + } + if got != want { + t.Errorf("segments=%v got=%s want=%s", segments, got, want) + } +} + +var segmentList = [][]string{ + {}, + {""}, + {"日", "本語"}, + {"\u65e5", "\u672c", "\u8a9e"}, + {"\U000065e5", "\U0000672c", "\U00008a9e"}, + {"\xe6", "\x97\xa5\xe6", "\x9c\xac\xe8\xaa\x9e"}, + {"Hello", ", ", "World", "!"}, + {"Hello", ", ", "", "World", "!"}, +} + +func TestReadRune(t *testing.T) { + for _, s := range segmentList { + readRuneSegments(t, s) + } +} + +func TestUnreadRune(t *testing.T) { + segments := []string{"Hello, world:", "日本語"} + r := NewReader(&StringReader{data: segments}) + got := "" + want := strings.Join(segments, "") + // Normal execution. + for { + r1, _, err := r.ReadRune() + if err != nil { + if err != io.EOF { + t.Error("unexpected error on ReadRune:", err) + } + break + } + got += string(r1) + // Put it back and read it again. + if err = r.UnreadRune(); err != nil { + t.Fatal("unexpected error on UnreadRune:", err) + } + r2, _, err := r.ReadRune() + if err != nil { + t.Fatal("unexpected error reading after unreading:", err) + } + if r1 != r2 { + t.Fatalf("incorrect rune after unread: got %c, want %c", r1, r2) + } + } + if got != want { + t.Errorf("got %q, want %q", got, want) + } +} + +func TestReaderUnreadByte(t *testing.T) { + segments := []string{"Hello, ", "world"} + r := NewReader(&StringReader{data: segments}) + got := "" + want := strings.Join(segments, "") + // Normal execution. + for { + b1, err := r.ReadByte() + if err != nil { + if err != io.EOF { + t.Error("unexpected error on ReadByte:", err) + } + break + } + got += string(b1) + // Put it back and read it again. + if err = r.UnreadByte(); err != nil { + t.Fatal("unexpected error on UnreadByte:", err) + } + b2, err := r.ReadByte() + if err != nil { + t.Fatal("unexpected error reading after unreading:", err) + } + if b1 != b2 { + t.Fatalf("incorrect byte after unread: got %q, want %q", b1, b2) + } + } + if got != want { + t.Errorf("got %q, want %q", got, want) + } +} + +func TestUnreadByteMultiple(t *testing.T) { + segments := []string{"Hello, ", "world"} + data := strings.Join(segments, "") + for n := 0; n <= len(data); n++ { + r := NewReader(&StringReader{data: segments}) + // Read n bytes. + for i := 0; i < n; i++ { + b, err := r.ReadByte() + if err != nil { + t.Fatalf("n = %d: unexpected error on ReadByte: %v", n, err) + } + if b != data[i] { + t.Fatalf("n = %d: incorrect byte returned from ReadByte: got %q, want %q", n, b, data[i]) + } + } + // Unread one byte if there is one. + if n > 0 { + if err := r.UnreadByte(); err != nil { + t.Errorf("n = %d: unexpected error on UnreadByte: %v", n, err) + } + } + // Test that we cannot unread any further. + if err := r.UnreadByte(); err == nil { + t.Errorf("n = %d: expected error on UnreadByte", n) + } + } +} + +func TestUnreadByteOthers(t *testing.T) { + // A list of readers to use in conjunction with UnreadByte. + var readers = []func(*Reader, byte) ([]byte, error){ + (*Reader).ReadBytes, + (*Reader).ReadSlice, + func(r *Reader, delim byte) ([]byte, error) { + data, err := r.ReadString(delim) + return []byte(data), err + }, + // ReadLine doesn't fit the data/pattern easily + // so we leave it out. It should be covered via + // the ReadSlice test since ReadLine simply calls + // ReadSlice, and it's that function that handles + // the last byte. + } + + // Try all readers with UnreadByte. + for rno, read := range readers { + // Some input data that is longer than the minimum reader buffer size. + const n = 10 + var buf bytes.Buffer + for i := 0; i < n; i++ { + buf.WriteString("abcdefg") + } + + r := NewReaderSize(&buf, minReadBufferSize) + readTo := func(delim byte, want string) { + data, err := read(r, delim) + if err != nil { + t.Fatalf("#%d: unexpected error reading to %c: %v", rno, delim, err) + } + if got := string(data); got != want { + t.Fatalf("#%d: got %q, want %q", rno, got, want) + } + } + + // Read the data with occasional UnreadByte calls. + for i := 0; i < n; i++ { + readTo('d', "abcd") + for j := 0; j < 3; j++ { + if err := r.UnreadByte(); err != nil { + t.Fatalf("#%d: unexpected error on UnreadByte: %v", rno, err) + } + readTo('d', "d") + } + readTo('g', "efg") + } + + // All data should have been read. + _, err := r.ReadByte() + if err != io.EOF { + t.Errorf("#%d: got error %v; want EOF", rno, err) + } + } +} + +// Test that UnreadRune fails if the preceding operation was not a ReadRune. +func TestUnreadRuneError(t *testing.T) { + buf := make([]byte, 3) // All runes in this test are 3 bytes long + r := NewReader(&StringReader{data: []string{"日本語日本語日本語"}}) + if r.UnreadRune() == nil { + t.Error("expected error on UnreadRune from fresh buffer") + } + _, _, err := r.ReadRune() + if err != nil { + t.Error("unexpected error on ReadRune (1):", err) + } + if err = r.UnreadRune(); err != nil { + t.Error("unexpected error on UnreadRune (1):", err) + } + if r.UnreadRune() == nil { + t.Error("expected error after UnreadRune (1)") + } + // Test error after Read. + _, _, err = r.ReadRune() // reset state + if err != nil { + t.Error("unexpected error on ReadRune (2):", err) + } + _, err = r.Read(buf) + if err != nil { + t.Error("unexpected error on Read (2):", err) + } + if r.UnreadRune() == nil { + t.Error("expected error after Read (2)") + } + // Test error after ReadByte. + _, _, err = r.ReadRune() // reset state + if err != nil { + t.Error("unexpected error on ReadRune (2):", err) + } + for _ = range buf { + _, err = r.ReadByte() + if err != nil { + t.Error("unexpected error on ReadByte (2):", err) + } + } + if r.UnreadRune() == nil { + t.Error("expected error after ReadByte") + } + // Test error after UnreadByte. + _, _, err = r.ReadRune() // reset state + if err != nil { + t.Error("unexpected error on ReadRune (3):", err) + } + _, err = r.ReadByte() + if err != nil { + t.Error("unexpected error on ReadByte (3):", err) + } + err = r.UnreadByte() + if err != nil { + t.Error("unexpected error on UnreadByte (3):", err) + } + if r.UnreadRune() == nil { + t.Error("expected error after UnreadByte (3)") + } +} + +func TestUnreadRuneAtEOF(t *testing.T) { + // UnreadRune/ReadRune should error at EOF (was a bug; used to panic) + r := NewReader(strings.NewReader("x")) + r.ReadRune() + r.ReadRune() + r.UnreadRune() + _, _, err := r.ReadRune() + if err == nil { + t.Error("expected error at EOF") + } else if err != io.EOF { + t.Error("expected EOF; got", err) + } +} + +func TestReadWriteRune(t *testing.T) { + const NRune = 1000 + byteBuf := new(bytes.Buffer) + w := NewWriter(byteBuf) + // Write the runes out using WriteRune + buf := make([]byte, utf8.UTFMax) + for r := rune(0); r < NRune; r++ { + size := utf8.EncodeRune(buf, r) + nbytes, err := w.WriteRune(r) + if err != nil { + t.Fatalf("WriteRune(0x%x) error: %s", r, err) + } + if nbytes != size { + t.Fatalf("WriteRune(0x%x) expected %d, got %d", r, size, nbytes) + } + } + w.Flush() + + r := NewReader(byteBuf) + // Read them back with ReadRune + for r1 := rune(0); r1 < NRune; r1++ { + size := utf8.EncodeRune(buf, r1) + nr, nbytes, err := r.ReadRune() + if nr != r1 || nbytes != size || err != nil { + t.Fatalf("ReadRune(0x%x) got 0x%x,%d not 0x%x,%d (err=%s)", r1, nr, nbytes, r1, size, err) + } + } +} + +func TestWriter(t *testing.T) { + var data [8192]byte + + for i := 0; i < len(data); i++ { + data[i] = byte(' ' + i%('~'-' ')) + } + w := new(bytes.Buffer) + for i := 0; i < len(bufsizes); i++ { + for j := 0; j < len(bufsizes); j++ { + nwrite := bufsizes[i] + bs := bufsizes[j] + + // Write nwrite bytes using buffer size bs. + // Check that the right amount makes it out + // and that the data is correct. + + w.Reset() + buf := NewWriterSize(w, bs) + context := fmt.Sprintf("nwrite=%d bufsize=%d", nwrite, bs) + n, e1 := buf.Write(data[0:nwrite]) + if e1 != nil || n != nwrite { + t.Errorf("%s: buf.Write %d = %d, %v", context, nwrite, n, e1) + continue + } + if e := buf.Flush(); e != nil { + t.Errorf("%s: buf.Flush = %v", context, e) + } + + written := w.Bytes() + if len(written) != nwrite { + t.Errorf("%s: %d bytes written", context, len(written)) + } + for l := 0; l < len(written); l++ { + if written[i] != data[i] { + t.Errorf("wrong bytes written") + t.Errorf("want=%q", data[0:len(written)]) + t.Errorf("have=%q", written) + } + } + } + } +} + +// Check that write errors are returned properly. + +type errorWriterTest struct { + n, m int + err error + expect error +} + +func (w errorWriterTest) Write(p []byte) (int, error) { + return len(p) * w.n / w.m, w.err +} + +var errorWriterTests = []errorWriterTest{ + {0, 1, nil, io.ErrShortWrite}, + {1, 2, nil, io.ErrShortWrite}, + {1, 1, nil, nil}, + {0, 1, io.ErrClosedPipe, io.ErrClosedPipe}, + {1, 2, io.ErrClosedPipe, io.ErrClosedPipe}, + {1, 1, io.ErrClosedPipe, io.ErrClosedPipe}, +} + +func TestWriteErrors(t *testing.T) { + for _, w := range errorWriterTests { + buf := NewWriter(w) + _, e := buf.Write([]byte("hello world")) + if e != nil { + t.Errorf("Write hello to %v: %v", w, e) + continue + } + // Two flushes, to verify the error is sticky. + for i := 0; i < 2; i++ { + e = buf.Flush() + if e != w.expect { + t.Errorf("Flush %d/2 %v: got %v, wanted %v", i+1, w, e, w.expect) + } + } + } +} + +func TestNewReaderSizeIdempotent(t *testing.T) { + const BufSize = 1000 + b := NewReaderSize(strings.NewReader("hello world"), BufSize) + // Does it recognize itself? + b1 := NewReaderSize(b, BufSize) + if b1 != b { + t.Error("NewReaderSize did not detect underlying Reader") + } + // Does it wrap if existing buffer is too small? + b2 := NewReaderSize(b, 2*BufSize) + if b2 == b { + t.Error("NewReaderSize did not enlarge buffer") + } +} + +func TestNewWriterSizeIdempotent(t *testing.T) { + const BufSize = 1000 + b := NewWriterSize(new(bytes.Buffer), BufSize) + // Does it recognize itself? + b1 := NewWriterSize(b, BufSize) + if b1 != b { + t.Error("NewWriterSize did not detect underlying Writer") + } + // Does it wrap if existing buffer is too small? + b2 := NewWriterSize(b, 2*BufSize) + if b2 == b { + t.Error("NewWriterSize did not enlarge buffer") + } +} + +func TestWriteString(t *testing.T) { + const BufSize = 8 + buf := new(bytes.Buffer) + b := NewWriterSize(buf, BufSize) + b.WriteString("0") // easy + b.WriteString("123456") // still easy + b.WriteString("7890") // easy after flush + b.WriteString("abcdefghijklmnopqrstuvwxy") // hard + b.WriteString("z") + if err := b.Flush(); err != nil { + t.Error("WriteString", err) + } + s := "01234567890abcdefghijklmnopqrstuvwxyz" + if string(buf.Bytes()) != s { + t.Errorf("WriteString wants %q gets %q", s, string(buf.Bytes())) + } +} + +func TestBufferFull(t *testing.T) { + const longString = "And now, hello, world! It is the time for all good men to come to the aid of their party" + buf := NewReaderSize(strings.NewReader(longString), minReadBufferSize) + line, err := buf.ReadSlice('!') + if string(line) != "And now, hello, " || err != ErrBufferFull { + t.Errorf("first ReadSlice(,) = %q, %v", line, err) + } + line, err = buf.ReadSlice('!') + if string(line) != "world!" || err != nil { + t.Errorf("second ReadSlice(,) = %q, %v", line, err) + } +} + +func TestPeek(t *testing.T) { + p := make([]byte, 10) + // string is 16 (minReadBufferSize) long. + buf := NewReaderSize(strings.NewReader("abcdefghijklmnop"), minReadBufferSize) + if s, err := buf.Peek(1); string(s) != "a" || err != nil { + t.Fatalf("want %q got %q, err=%v", "a", string(s), err) + } + if s, err := buf.Peek(4); string(s) != "abcd" || err != nil { + t.Fatalf("want %q got %q, err=%v", "abcd", string(s), err) + } + if _, err := buf.Peek(-1); err != ErrNegativeCount { + t.Fatalf("want ErrNegativeCount got %v", err) + } + if _, err := buf.Peek(32); err != ErrBufferFull { + t.Fatalf("want ErrBufFull got %v", err) + } + if _, err := buf.Read(p[0:3]); string(p[0:3]) != "abc" || err != nil { + t.Fatalf("want %q got %q, err=%v", "abc", string(p[0:3]), err) + } + if s, err := buf.Peek(1); string(s) != "d" || err != nil { + t.Fatalf("want %q got %q, err=%v", "d", string(s), err) + } + if s, err := buf.Peek(2); string(s) != "de" || err != nil { + t.Fatalf("want %q got %q, err=%v", "de", string(s), err) + } + if _, err := buf.Read(p[0:3]); string(p[0:3]) != "def" || err != nil { + t.Fatalf("want %q got %q, err=%v", "def", string(p[0:3]), err) + } + if s, err := buf.Peek(4); string(s) != "ghij" || err != nil { + t.Fatalf("want %q got %q, err=%v", "ghij", string(s), err) + } + if _, err := buf.Read(p[0:]); string(p[0:]) != "ghijklmnop" || err != nil { + t.Fatalf("want %q got %q, err=%v", "ghijklmnop", string(p[0:minReadBufferSize]), err) + } + if s, err := buf.Peek(0); string(s) != "" || err != nil { + t.Fatalf("want %q got %q, err=%v", "", string(s), err) + } + if _, err := buf.Peek(1); err != io.EOF { + t.Fatalf("want EOF got %v", err) + } + + // Test for issue 3022, not exposing a reader's error on a successful Peek. + buf = NewReaderSize(dataAndEOFReader("abcd"), 32) + if s, err := buf.Peek(2); string(s) != "ab" || err != nil { + t.Errorf(`Peek(2) on "abcd", EOF = %q, %v; want "ab", nil`, string(s), err) + } + if s, err := buf.Peek(4); string(s) != "abcd" || err != nil { + t.Errorf(`Peek(4) on "abcd", EOF = %q, %v; want "abcd", nil`, string(s), err) + } + if n, err := buf.Read(p[0:5]); string(p[0:n]) != "abcd" || err != nil { + t.Fatalf("Read after peek = %q, %v; want abcd, EOF", p[0:n], err) + } + if n, err := buf.Read(p[0:1]); string(p[0:n]) != "" || err != io.EOF { + t.Fatalf(`second Read after peek = %q, %v; want "", EOF`, p[0:n], err) + } +} + +type dataAndEOFReader string + +func (r dataAndEOFReader) Read(p []byte) (int, error) { + return copy(p, r), io.EOF +} + +func TestPeekThenUnreadRune(t *testing.T) { + // This sequence used to cause a crash. + r := NewReader(strings.NewReader("x")) + r.ReadRune() + r.Peek(1) + r.UnreadRune() + r.ReadRune() // Used to panic here +} + +var testOutput = []byte("0123456789abcdefghijklmnopqrstuvwxy") +var testInput = []byte("012\n345\n678\n9ab\ncde\nfgh\nijk\nlmn\nopq\nrst\nuvw\nxy") +var testInputrn = []byte("012\r\n345\r\n678\r\n9ab\r\ncde\r\nfgh\r\nijk\r\nlmn\r\nopq\r\nrst\r\nuvw\r\nxy\r\n\n\r\n") + +// TestReader wraps a []byte and returns reads of a specific length. +type testReader struct { + data []byte + stride int +} + +func (t *testReader) Read(buf []byte) (n int, err error) { + n = t.stride + if n > len(t.data) { + n = len(t.data) + } + if n > len(buf) { + n = len(buf) + } + copy(buf, t.data) + t.data = t.data[n:] + if len(t.data) == 0 { + err = io.EOF + } + return +} + +func testReadLine(t *testing.T, input []byte) { + //for stride := 1; stride < len(input); stride++ { + for stride := 1; stride < 2; stride++ { + done := 0 + reader := testReader{input, stride} + l := NewReaderSize(&reader, len(input)+1) + for { + line, isPrefix, err := l.ReadLine() + if len(line) > 0 && err != nil { + t.Errorf("ReadLine returned both data and error: %s", err) + } + if isPrefix { + t.Errorf("ReadLine returned prefix") + } + if err != nil { + if err != io.EOF { + t.Fatalf("Got unknown error: %s", err) + } + break + } + if want := testOutput[done : done+len(line)]; !bytes.Equal(want, line) { + t.Errorf("Bad line at stride %d: want: %x got: %x", stride, want, line) + } + done += len(line) + } + if done != len(testOutput) { + t.Errorf("ReadLine didn't return everything: got: %d, want: %d (stride: %d)", done, len(testOutput), stride) + } + } +} + +func TestReadLine(t *testing.T) { + testReadLine(t, testInput) + testReadLine(t, testInputrn) +} + +func TestLineTooLong(t *testing.T) { + data := make([]byte, 0) + for i := 0; i < minReadBufferSize*5/2; i++ { + data = append(data, '0'+byte(i%10)) + } + buf := bytes.NewReader(data) + l := NewReaderSize(buf, minReadBufferSize) + line, isPrefix, err := l.ReadLine() + if !isPrefix || !bytes.Equal(line, data[:minReadBufferSize]) || err != nil { + t.Errorf("bad result for first line: got %q want %q %v", line, data[:minReadBufferSize], err) + } + data = data[len(line):] + line, isPrefix, err = l.ReadLine() + if !isPrefix || !bytes.Equal(line, data[:minReadBufferSize]) || err != nil { + t.Errorf("bad result for second line: got %q want %q %v", line, data[:minReadBufferSize], err) + } + data = data[len(line):] + line, isPrefix, err = l.ReadLine() + if isPrefix || !bytes.Equal(line, data[:minReadBufferSize/2]) || err != nil { + t.Errorf("bad result for third line: got %q want %q %v", line, data[:minReadBufferSize/2], err) + } + line, isPrefix, err = l.ReadLine() + if isPrefix || err == nil { + t.Errorf("expected no more lines: %x %s", line, err) + } +} + +func TestReadAfterLines(t *testing.T) { + line1 := "this is line1" + restData := "this is line2\nthis is line 3\n" + inbuf := bytes.NewReader([]byte(line1 + "\n" + restData)) + outbuf := new(bytes.Buffer) + maxLineLength := len(line1) + len(restData)/2 + l := NewReaderSize(inbuf, maxLineLength) + line, isPrefix, err := l.ReadLine() + if isPrefix || err != nil || string(line) != line1 { + t.Errorf("bad result for first line: isPrefix=%v err=%v line=%q", isPrefix, err, string(line)) + } + n, err := io.Copy(outbuf, l) + if int(n) != len(restData) || err != nil { + t.Errorf("bad result for Read: n=%d err=%v", n, err) + } + if outbuf.String() != restData { + t.Errorf("bad result for Read: got %q; expected %q", outbuf.String(), restData) + } +} + +func TestReadEmptyBuffer(t *testing.T) { + l := NewReaderSize(new(bytes.Buffer), minReadBufferSize) + line, isPrefix, err := l.ReadLine() + if err != io.EOF { + t.Errorf("expected EOF from ReadLine, got '%s' %t %s", line, isPrefix, err) + } +} + +func TestLinesAfterRead(t *testing.T) { + l := NewReaderSize(bytes.NewReader([]byte("foo")), minReadBufferSize) + _, err := ioutil.ReadAll(l) + if err != nil { + t.Error(err) + return + } + + line, isPrefix, err := l.ReadLine() + if err != io.EOF { + t.Errorf("expected EOF from ReadLine, got '%s' %t %s", line, isPrefix, err) + } +} + +func TestReadLineNonNilLineOrError(t *testing.T) { + r := NewReader(strings.NewReader("line 1\n")) + for i := 0; i < 2; i++ { + l, _, err := r.ReadLine() + if l != nil && err != nil { + t.Fatalf("on line %d/2; ReadLine=%#v, %v; want non-nil line or Error, but not both", + i+1, l, err) + } + } +} + +type readLineResult struct { + line []byte + isPrefix bool + err error +} + +var readLineNewlinesTests = []struct { + input string + expect []readLineResult +}{ + {"012345678901234\r\n012345678901234\r\n", []readLineResult{ + {[]byte("012345678901234"), true, nil}, + {nil, false, nil}, + {[]byte("012345678901234"), true, nil}, + {nil, false, nil}, + {nil, false, io.EOF}, + }}, + {"0123456789012345\r012345678901234\r", []readLineResult{ + {[]byte("0123456789012345"), true, nil}, + {[]byte("\r012345678901234"), true, nil}, + {[]byte("\r"), false, nil}, + {nil, false, io.EOF}, + }}, +} + +func TestReadLineNewlines(t *testing.T) { + for _, e := range readLineNewlinesTests { + testReadLineNewlines(t, e.input, e.expect) + } +} + +func testReadLineNewlines(t *testing.T, input string, expect []readLineResult) { + b := NewReaderSize(strings.NewReader(input), minReadBufferSize) + for i, e := range expect { + line, isPrefix, err := b.ReadLine() + if !bytes.Equal(line, e.line) { + t.Errorf("%q call %d, line == %q, want %q", input, i, line, e.line) + return + } + if isPrefix != e.isPrefix { + t.Errorf("%q call %d, isPrefix == %v, want %v", input, i, isPrefix, e.isPrefix) + return + } + if err != e.err { + t.Errorf("%q call %d, err == %v, want %v", input, i, err, e.err) + return + } + } +} + +func createTestInput(n int) []byte { + input := make([]byte, n) + for i := range input { + // 101 and 251 are arbitrary prime numbers. + // The idea is to create an input sequence + // which doesn't repeat too frequently. + input[i] = byte(i % 251) + if i%101 == 0 { + input[i] ^= byte(i / 101) + } + } + return input +} + +func TestReaderWriteTo(t *testing.T) { + input := createTestInput(8192) + r := NewReader(onlyReader{bytes.NewReader(input)}) + w := new(bytes.Buffer) + if n, err := r.WriteTo(w); err != nil || n != int64(len(input)) { + t.Fatalf("r.WriteTo(w) = %d, %v, want %d, nil", n, err, len(input)) + } + + for i, val := range w.Bytes() { + if val != input[i] { + t.Errorf("after write: out[%d] = %#x, want %#x", i, val, input[i]) + } + } +} + +type errorWriterToTest struct { + rn, wn int + rerr, werr error + expected error +} + +func (r errorWriterToTest) Read(p []byte) (int, error) { + return len(p) * r.rn, r.rerr +} + +func (w errorWriterToTest) Write(p []byte) (int, error) { + return len(p) * w.wn, w.werr +} + +var errorWriterToTests = []errorWriterToTest{ + {1, 0, nil, io.ErrClosedPipe, io.ErrClosedPipe}, + {0, 1, io.ErrClosedPipe, nil, io.ErrClosedPipe}, + {0, 0, io.ErrUnexpectedEOF, io.ErrClosedPipe, io.ErrClosedPipe}, + {0, 1, io.EOF, nil, nil}, +} + +func TestReaderWriteToErrors(t *testing.T) { + for i, rw := range errorWriterToTests { + r := NewReader(rw) + if _, err := r.WriteTo(rw); err != rw.expected { + t.Errorf("r.WriteTo(errorWriterToTests[%d]) = _, %v, want _,%v", i, err, rw.expected) + } + } +} + +func TestWriterReadFrom(t *testing.T) { + ws := []func(io.Writer) io.Writer{ + func(w io.Writer) io.Writer { return onlyWriter{w} }, + func(w io.Writer) io.Writer { return w }, + } + + rs := []func(io.Reader) io.Reader{ + iotest.DataErrReader, + func(r io.Reader) io.Reader { return r }, + } + + for ri, rfunc := range rs { + for wi, wfunc := range ws { + input := createTestInput(8192) + b := new(bytes.Buffer) + w := NewWriter(wfunc(b)) + r := rfunc(bytes.NewReader(input)) + if n, err := w.ReadFrom(r); err != nil || n != int64(len(input)) { + t.Errorf("ws[%d],rs[%d]: w.ReadFrom(r) = %d, %v, want %d, nil", wi, ri, n, err, len(input)) + continue + } + if err := w.Flush(); err != nil { + t.Errorf("Flush returned %v", err) + continue + } + if got, want := b.String(), string(input); got != want { + t.Errorf("ws[%d], rs[%d]:\ngot %q\nwant %q\n", wi, ri, got, want) + } + } + } +} + +type errorReaderFromTest struct { + rn, wn int + rerr, werr error + expected error +} + +func (r errorReaderFromTest) Read(p []byte) (int, error) { + return len(p) * r.rn, r.rerr +} + +func (w errorReaderFromTest) Write(p []byte) (int, error) { + return len(p) * w.wn, w.werr +} + +var errorReaderFromTests = []errorReaderFromTest{ + {0, 1, io.EOF, nil, nil}, + {1, 1, io.EOF, nil, nil}, + {0, 1, io.ErrClosedPipe, nil, io.ErrClosedPipe}, + {0, 0, io.ErrClosedPipe, io.ErrShortWrite, io.ErrClosedPipe}, + {1, 0, nil, io.ErrShortWrite, io.ErrShortWrite}, +} + +func TestWriterReadFromErrors(t *testing.T) { + for i, rw := range errorReaderFromTests { + w := NewWriter(rw) + if _, err := w.ReadFrom(rw); err != rw.expected { + t.Errorf("w.ReadFrom(errorReaderFromTests[%d]) = _, %v, want _,%v", i, err, rw.expected) + } + } +} + +// TestWriterReadFromCounts tests that using io.Copy to copy into a +// bufio.Writer does not prematurely flush the buffer. For example, when +// buffering writes to a network socket, excessive network writes should be +// avoided. +func TestWriterReadFromCounts(t *testing.T) { + var w0 writeCountingDiscard + b0 := NewWriterSize(&w0, 1234) + b0.WriteString(strings.Repeat("x", 1000)) + if w0 != 0 { + t.Fatalf("write 1000 'x's: got %d writes, want 0", w0) + } + b0.WriteString(strings.Repeat("x", 200)) + if w0 != 0 { + t.Fatalf("write 1200 'x's: got %d writes, want 0", w0) + } + io.Copy(b0, onlyReader{strings.NewReader(strings.Repeat("x", 30))}) + if w0 != 0 { + t.Fatalf("write 1230 'x's: got %d writes, want 0", w0) + } + io.Copy(b0, onlyReader{strings.NewReader(strings.Repeat("x", 9))}) + if w0 != 1 { + t.Fatalf("write 1239 'x's: got %d writes, want 1", w0) + } + + var w1 writeCountingDiscard + b1 := NewWriterSize(&w1, 1234) + b1.WriteString(strings.Repeat("x", 1200)) + b1.Flush() + if w1 != 1 { + t.Fatalf("flush 1200 'x's: got %d writes, want 1", w1) + } + b1.WriteString(strings.Repeat("x", 89)) + if w1 != 1 { + t.Fatalf("write 1200 + 89 'x's: got %d writes, want 1", w1) + } + io.Copy(b1, onlyReader{strings.NewReader(strings.Repeat("x", 700))}) + if w1 != 1 { + t.Fatalf("write 1200 + 789 'x's: got %d writes, want 1", w1) + } + io.Copy(b1, onlyReader{strings.NewReader(strings.Repeat("x", 600))}) + if w1 != 2 { + t.Fatalf("write 1200 + 1389 'x's: got %d writes, want 2", w1) + } + b1.Flush() + if w1 != 3 { + t.Fatalf("flush 1200 + 1389 'x's: got %d writes, want 3", w1) + } +} + +// A writeCountingDiscard is like ioutil.Discard and counts the number of times +// Write is called on it. +type writeCountingDiscard int + +func (w *writeCountingDiscard) Write(p []byte) (int, error) { + *w++ + return len(p), nil +} + +type negativeReader int + +func (r *negativeReader) Read([]byte) (int, error) { return -1, nil } + +func TestNegativeRead(t *testing.T) { + // should panic with a description pointing at the reader, not at itself. + // (should NOT panic with slice index error, for example.) + b := NewReader(new(negativeReader)) + defer func() { + switch err := recover().(type) { + case nil: + t.Fatal("read did not panic") + case error: + if !strings.Contains(err.Error(), "reader returned negative count from Read") { + t.Fatalf("wrong panic: %v", err) + } + default: + t.Fatalf("unexpected panic value: %T(%v)", err, err) + } + }() + b.Read(make([]byte, 100)) +} + +var errFake = errors.New("fake error") + +type errorThenGoodReader struct { + didErr bool + nread int +} + +func (r *errorThenGoodReader) Read(p []byte) (int, error) { + r.nread++ + if !r.didErr { + r.didErr = true + return 0, errFake + } + return len(p), nil +} + +func TestReaderClearError(t *testing.T) { + r := &errorThenGoodReader{} + b := NewReader(r) + buf := make([]byte, 1) + if _, err := b.Read(nil); err != nil { + t.Fatalf("1st nil Read = %v; want nil", err) + } + if _, err := b.Read(buf); err != errFake { + t.Fatalf("1st Read = %v; want errFake", err) + } + if _, err := b.Read(nil); err != nil { + t.Fatalf("2nd nil Read = %v; want nil", err) + } + if _, err := b.Read(buf); err != nil { + t.Fatalf("3rd Read with buffer = %v; want nil", err) + } + if r.nread != 2 { + t.Errorf("num reads = %d; want 2", r.nread) + } +} + +// Test for golang.org/issue/5947 +func TestWriterReadFromWhileFull(t *testing.T) { + buf := new(bytes.Buffer) + w := NewWriterSize(buf, 10) + + // Fill buffer exactly. + n, err := w.Write([]byte("0123456789")) + if n != 10 || err != nil { + t.Fatalf("Write returned (%v, %v), want (10, nil)", n, err) + } + + // Use ReadFrom to read in some data. + n2, err := w.ReadFrom(strings.NewReader("abcdef")) + if n2 != 6 || err != nil { + t.Fatalf("ReadFrom returned (%v, %v), want (6, nil)", n2, err) + } +} + +type emptyThenNonEmptyReader struct { + r io.Reader + n int +} + +func (r *emptyThenNonEmptyReader) Read(p []byte) (int, error) { + if r.n <= 0 { + return r.r.Read(p) + } + r.n-- + return 0, nil +} + +// Test for golang.org/issue/7611 +func TestWriterReadFromUntilEOF(t *testing.T) { + buf := new(bytes.Buffer) + w := NewWriterSize(buf, 5) + + // Partially fill buffer + n, err := w.Write([]byte("0123")) + if n != 4 || err != nil { + t.Fatalf("Write returned (%v, %v), want (4, nil)", n, err) + } + + // Use ReadFrom to read in some data. + r := &emptyThenNonEmptyReader{r: strings.NewReader("abcd"), n: 3} + n2, err := w.ReadFrom(r) + if n2 != 4 || err != nil { + t.Fatalf("ReadFrom returned (%v, %v), want (4, nil)", n2, err) + } + w.Flush() + if got, want := string(buf.Bytes()), "0123abcd"; got != want { + t.Fatalf("buf.Bytes() returned %q, want %q", got, want) + } +} + +func TestWriterReadFromErrNoProgress(t *testing.T) { + buf := new(bytes.Buffer) + w := NewWriterSize(buf, 5) + + // Partially fill buffer + n, err := w.Write([]byte("0123")) + if n != 4 || err != nil { + t.Fatalf("Write returned (%v, %v), want (4, nil)", n, err) + } + + // Use ReadFrom to read in some data. + r := &emptyThenNonEmptyReader{r: strings.NewReader("abcd"), n: 100} + n2, err := w.ReadFrom(r) + if n2 != 0 || err != io.ErrNoProgress { + t.Fatalf("buf.Bytes() returned (%v, %v), want (0, io.ErrNoProgress)", n2, err) + } +} + +func TestReaderReset(t *testing.T) { + r := NewReader(strings.NewReader("foo foo")) + buf := make([]byte, 3) + r.Read(buf) + if string(buf) != "foo" { + t.Errorf("buf = %q; want foo", buf) + } + r.Reset(strings.NewReader("bar bar")) + all, err := ioutil.ReadAll(r) + if err != nil { + t.Fatal(err) + } + if string(all) != "bar bar" { + t.Errorf("ReadAll = %q; want bar bar", all) + } +} + +func TestWriterReset(t *testing.T) { + var buf1, buf2 bytes.Buffer + w := NewWriter(&buf1) + w.WriteString("foo") + w.Reset(&buf2) // and not flushed + w.WriteString("bar") + w.Flush() + if buf1.String() != "" { + t.Errorf("buf1 = %q; want empty", buf1.String()) + } + if buf2.String() != "bar" { + t.Errorf("buf2 = %q; want bar", buf2.String()) + } +} + +// An onlyReader only implements io.Reader, no matter what other methods the underlying implementation may have. +type onlyReader struct { + io.Reader +} + +// An onlyWriter only implements io.Writer, no matter what other methods the underlying implementation may have. +type onlyWriter struct { + io.Writer +} + +func BenchmarkReaderCopyOptimal(b *testing.B) { + // Optimal case is where the underlying reader implements io.WriterTo + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + src := NewReader(srcBuf) + dstBuf := new(bytes.Buffer) + dst := onlyWriter{dstBuf} + for i := 0; i < b.N; i++ { + srcBuf.Reset() + src.Reset(srcBuf) + dstBuf.Reset() + io.Copy(dst, src) + } +} + +func BenchmarkReaderCopyUnoptimal(b *testing.B) { + // Unoptimal case is where the underlying reader doesn't implement io.WriterTo + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + src := NewReader(onlyReader{srcBuf}) + dstBuf := new(bytes.Buffer) + dst := onlyWriter{dstBuf} + for i := 0; i < b.N; i++ { + srcBuf.Reset() + src.Reset(onlyReader{srcBuf}) + dstBuf.Reset() + io.Copy(dst, src) + } +} + +func BenchmarkReaderCopyNoWriteTo(b *testing.B) { + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + srcReader := NewReader(srcBuf) + src := onlyReader{srcReader} + dstBuf := new(bytes.Buffer) + dst := onlyWriter{dstBuf} + for i := 0; i < b.N; i++ { + srcBuf.Reset() + srcReader.Reset(srcBuf) + dstBuf.Reset() + io.Copy(dst, src) + } +} + +func BenchmarkReaderWriteToOptimal(b *testing.B) { + const bufSize = 16 << 10 + buf := make([]byte, bufSize) + r := bytes.NewReader(buf) + srcReader := NewReaderSize(onlyReader{r}, 1<<10) + if _, ok := ioutil.Discard.(io.ReaderFrom); !ok { + b.Fatal("ioutil.Discard doesn't support ReaderFrom") + } + for i := 0; i < b.N; i++ { + r.Seek(0, 0) + srcReader.Reset(onlyReader{r}) + n, err := srcReader.WriteTo(ioutil.Discard) + if err != nil { + b.Fatal(err) + } + if n != bufSize { + b.Fatalf("n = %d; want %d", n, bufSize) + } + } +} + +func BenchmarkWriterCopyOptimal(b *testing.B) { + // Optimal case is where the underlying writer implements io.ReaderFrom + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + src := onlyReader{srcBuf} + dstBuf := new(bytes.Buffer) + dst := NewWriter(dstBuf) + for i := 0; i < b.N; i++ { + srcBuf.Reset() + dstBuf.Reset() + dst.Reset(dstBuf) + io.Copy(dst, src) + } +} + +func BenchmarkWriterCopyUnoptimal(b *testing.B) { + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + src := onlyReader{srcBuf} + dstBuf := new(bytes.Buffer) + dst := NewWriter(onlyWriter{dstBuf}) + for i := 0; i < b.N; i++ { + srcBuf.Reset() + dstBuf.Reset() + dst.Reset(onlyWriter{dstBuf}) + io.Copy(dst, src) + } +} + +func BenchmarkWriterCopyNoReadFrom(b *testing.B) { + srcBuf := bytes.NewBuffer(make([]byte, 8192)) + src := onlyReader{srcBuf} + dstBuf := new(bytes.Buffer) + dstWriter := NewWriter(dstBuf) + dst := onlyWriter{dstWriter} + for i := 0; i < b.N; i++ { + srcBuf.Reset() + dstBuf.Reset() + dstWriter.Reset(dstBuf) + io.Copy(dst, src) + } +} + +func BenchmarkReaderEmpty(b *testing.B) { + b.ReportAllocs() + str := strings.Repeat("x", 16<<10) + for i := 0; i < b.N; i++ { + br := NewReader(strings.NewReader(str)) + n, err := io.Copy(ioutil.Discard, br) + if err != nil { + b.Fatal(err) + } + if n != int64(len(str)) { + b.Fatal("wrong length") + } + } +} + +func BenchmarkWriterEmpty(b *testing.B) { + b.ReportAllocs() + str := strings.Repeat("x", 1<<10) + bs := []byte(str) + for i := 0; i < b.N; i++ { + bw := NewWriter(ioutil.Discard) + bw.Flush() + bw.WriteByte('a') + bw.Flush() + bw.WriteRune('B') + bw.Flush() + bw.Write(bs) + bw.Flush() + bw.WriteString(str) + bw.Flush() + } +} + +func BenchmarkWriterFlush(b *testing.B) { + b.ReportAllocs() + bw := NewWriter(ioutil.Discard) + str := strings.Repeat("x", 50) + for i := 0; i < b.N; i++ { + bw.WriteString(str) + bw.Flush() + } +} diff --git a/Godeps/_workspace/src/gopkg.in/bufio.v1/export_test.go b/Godeps/_workspace/src/gopkg.in/bufio.v1/export_test.go new file mode 100644 index 000000000..16629d022 --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/bufio.v1/export_test.go @@ -0,0 +1,9 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package bufio + +func (b *Buffer) Cap() int { + return cap(b.buf) +} -- cgit v1.2.3-1-g7c22