archive/tar.install: bytes.install io.install os.install strconv.install strings.install
asn1.install: fmt.install os.install reflect.install strconv.install strings.install time.install
-base64.install: bytes.install io.install os.install strconv.install
-base85.install: bytes.install io.install os.install strconv.install
big.install:
bignum.install: fmt.install
bufio.install: io.install os.install strconv.install utf8.install
crypto/md5.install: hash.install os.install
crypto/rc4.install: os.install strconv.install
crypto/sha1.install: hash.install os.install
-debug/binary.install: io.install math.install os.install reflect.install
-debug/dwarf.install: debug/binary.install os.install strconv.install
-debug/macho.install: bytes.install debug/binary.install debug/dwarf.install fmt.install io.install os.install strconv.install
-debug/elf.install: debug/binary.install debug/dwarf.install fmt.install io.install os.install strconv.install
-debug/gosym.install: debug/binary.install fmt.install os.install strconv.install strings.install
+debug/dwarf.install: encoding/binary.install os.install strconv.install
+debug/macho.install: bytes.install debug/dwarf.install encoding/binary.install fmt.install io.install os.install strconv.install
+debug/elf.install: debug/dwarf.install encoding/binary.install fmt.install io.install os.install strconv.install
+debug/gosym.install: encoding/binary.install fmt.install os.install strconv.install strings.install
debug/proc.install: container/vector.install fmt.install io.install os.install runtime.install strconv.install strings.install sync.install syscall.install
ebnf.install: container/vector.install go/scanner.install go/token.install os.install strconv.install unicode.install utf8.install
+encoding/ascii85.install: bytes.install io.install os.install strconv.install
+encoding/base64.install: bytes.install io.install os.install strconv.install
+encoding/binary.install: io.install math.install os.install reflect.install
+encoding/git85.install: bytes.install io.install os.install strconv.install
exec.install: os.install strings.install
exp/datafmt.install: bytes.install container/vector.install fmt.install go/scanner.install go/token.install io.install os.install reflect.install runtime.install strconv.install strings.install
exp/eval.install: bignum.install fmt.install go/ast.install go/parser.install go/scanner.install go/token.install log.install os.install reflect.install runtime.install strconv.install strings.install
DIRS=\
archive/tar\
asn1\
- base64\
- base85\
big\
bignum\
bufio\
crypto/md5\
crypto/rc4\
crypto/sha1\
- debug/binary\
debug/dwarf\
debug/macho\
debug/elf\
debug/gosym\
debug/proc\
ebnf\
+ encoding/ascii85\
+ encoding/base64\
+ encoding/binary\
+ encoding/git85\
exec\
exp/datafmt\
exp/eval\
package dwarf
import (
- "debug/binary";
+ "encoding/binary";
"os";
"strconv";
)
package dwarf
import (
- "debug/binary";
+ "encoding/binary";
"os";
)
package elf
import (
- "debug/binary";
"debug/dwarf";
+ "encoding/binary";
"fmt";
"io";
"os";
package elf
import (
- "debug/binary";
+ "encoding/binary";
"reflect";
"testing";
)
package gosym
-import "debug/binary"
+import "encoding/binary"
type LineTable struct {
Data []byte;
// and the Go format is the runtime source, specifically ../../runtime/symtab.c.
import (
- "debug/binary";
+ "encoding/binary";
"fmt";
"os";
"strconv";
import (
"bytes";
- "debug/binary";
"debug/dwarf";
+ "encoding/binary";
"fmt";
"io";
"os";
--- /dev/null
+# 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.
+
+include $(GOROOT)/src/Make.$(GOARCH)
+
+TARG=encoding/ascii85
+GOFILES=\
+ ascii85.go\
+
+include $(GOROOT)/src/Make.pkg
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-// Package base85 implements radix 85 encoding/decoding.
-package base85
+// Package ascii85 implements the ascii85 data encoding
+// as used in the btoa tool and Adobe's PostScript and PDF document formats.
+package ascii85
import (
"bytes";
// Encode encodes src into at most MaxEncodedLen(len(src))
// bytes of dst, returning the actual number of bytes written.
-// Encode implements the ascii85 encoding as used in the btoa
-// tool and Adobe's PostScript and PDF document formats.
//
// The encoding handles 4-byte chunks, using a special encoding
// for the last fragment, so Encode is not appropriate for use on
// individual blocks of a large data stream. Use NewEncoder() instead.
+//
+// Often, ascii85-encoded data is wrapped in <~ and ~> symbols.
+// Encode does not add these.
func Encode(src, dst []byte) int {
if len(src) == 0 {
return 0;
// If src contains invalid ascii85 data, Decode will return the
// number of bytes successfully written and a CorruptInputError.
// Decode ignores space and control characters in src.
+// Often, ascii85-encoded data is wrapped in <~ and ~> symbols.
+// Decode expects these to have been stripped by the caller.
//
// If flush is true, Decode assumes that src represents the
// end of the input stream and processes it completely rather
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-package base85
+package ascii85
import (
"bytes";
--- /dev/null
+# 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.
+
+include $(GOROOT)/src/Make.$(GOARCH)
+
+TARG=encoding/base64
+GOFILES=\
+ base64.go\
+
+include $(GOROOT)/src/Make.pkg
--- /dev/null
+// 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 base64 implements base64 encoding as specified by RFC 4648.
+package base64
+
+import (
+ "bytes";
+ "io";
+ "os";
+ "strconv";
+)
+
+/*
+ * Encodings
+ */
+
+// An Encoding is a radix 64 encoding/decoding scheme, defined by a
+// 64-character alphabet. The most common encoding is the "base64"
+// encoding defined in RFC 4648 and used in MIME (RFC 2045) and PEM
+// (RFC 1421). RFC 4648 also defines an alternate encoding, which is
+// the standard encoding with - and _ substituted for + and /.
+type Encoding struct {
+ encode string;
+ decodeMap [256]byte;
+}
+
+const encodeStd = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+const encodeURL = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
+
+// NewEncoding returns a new Encoding defined by the given alphabet,
+// which must be a 64-byte string.
+func NewEncoding(encoder string) *Encoding {
+ e := new(Encoding);
+ e.encode = encoder;
+ for i := 0; i < len(e.decodeMap); i++ {
+ e.decodeMap[i] = 0xFF;
+ }
+ for i := 0; i < len(encoder); i++ {
+ e.decodeMap[encoder[i]] = byte(i);
+ }
+ return e;
+}
+
+// StdEncoding is the standard base64 encoding, as defined in
+// RFC 4648.
+var StdEncoding = NewEncoding(encodeStd)
+
+// URLEncoding is the alternate base64 encoding defined in RFC 4648.
+// It is typically used in URLs and file names.
+var URLEncoding = NewEncoding(encodeURL)
+
+/*
+ * Encoder
+ */
+
+// Encode encodes src using the encoding enc, writing
+// EncodedLen(len(src)) bytes to dst.
+//
+// The encoding pads the output to a multiple of 4 bytes,
+// so Encode is not appropriate for use on individual blocks
+// of a large data stream. Use NewEncoder() instead.
+func (enc *Encoding) Encode(src, dst []byte) {
+ if len(src) == 0 {
+ return;
+ }
+
+ for len(src) > 0 {
+ dst[0] = 0;
+ dst[1] = 0;
+ dst[2] = 0;
+ dst[3] = 0;
+
+ // Unpack 4x 6-bit source blocks into a 4 byte
+ // destination quantum
+ switch len(src) {
+ default:
+ dst[3] |= src[2]&0x3F;
+ dst[2] |= src[2]>>6;
+ fallthrough;
+ case 2:
+ dst[2] |= (src[1]<<2)&0x3F;
+ dst[1] |= src[1]>>4;
+ fallthrough;
+ case 1:
+ dst[1] |= (src[0]<<4)&0x3F;
+ dst[0] |= src[0]>>2;
+ }
+
+ // Encode 6-bit blocks using the base64 alphabet
+ for j := 0; j < 4; j++ {
+ dst[j] = enc.encode[dst[j]];
+ }
+
+ // Pad the final quantum
+ if len(src) < 3 {
+ dst[3] = '=';
+ if len(src) < 2 {
+ dst[2] = '=';
+ }
+ break;
+ }
+
+ src = src[3:len(src)];
+ dst = dst[4:len(dst)];
+ }
+}
+
+type encoder struct {
+ err os.Error;
+ enc *Encoding;
+ w io.Writer;
+ buf [3]byte; // buffered data waiting to be encoded
+ nbuf int; // number of bytes in buf
+ out [1024]byte; // output buffer
+}
+
+func (e *encoder) Write(p []byte) (n int, err os.Error) {
+ if e.err != nil {
+ return 0, e.err;
+ }
+
+ // Leading fringe.
+ if e.nbuf > 0 {
+ var i int;
+ for i = 0; i < len(p) && e.nbuf < 3; i++ {
+ e.buf[e.nbuf] = p[i];
+ e.nbuf++;
+ }
+ n += i;
+ p = p[i:len(p)];
+ if e.nbuf < 3 {
+ return;
+ }
+ e.enc.Encode(&e.buf, &e.out);
+ if _, e.err = e.w.Write(e.out[0:4]); e.err != nil {
+ return n, e.err;
+ }
+ e.nbuf = 0;
+ }
+
+ // Large interior chunks.
+ for len(p) >= 3 {
+ nn := len(e.out)/4*3;
+ if nn > len(p) {
+ nn = len(p);
+ }
+ nn -= nn%3;
+ if nn > 0 {
+ e.enc.Encode(p[0:nn], &e.out);
+ if _, e.err = e.w.Write(e.out[0 : nn/3*4]); e.err != nil {
+ return n, e.err;
+ }
+ }
+ n += nn;
+ p = p[nn:len(p)];
+ }
+
+ // Trailing fringe.
+ for i := 0; i < len(p); i++ {
+ e.buf[i] = p[i];
+ }
+ e.nbuf = len(p);
+ n += len(p);
+ return;
+}
+
+// Close flushes any pending output from the encoder.
+// It is an error to call Write after calling Close.
+func (e *encoder) Close() os.Error {
+ // If there's anything left in the buffer, flush it out
+ if e.err == nil && e.nbuf > 0 {
+ e.enc.Encode(e.buf[0 : e.nbuf], &e.out);
+ e.nbuf = 0;
+ _, e.err = e.w.Write(e.out[0:4]);
+ }
+ return e.err;
+}
+
+// NewEncoder returns a new base64 stream encoder. Data written to
+// the returned writer will be encoded using enc and then written to w.
+// Base64 encodings operate in 4-byte blocks; when finished
+// writing, the caller must Close the returned encoder to flush any
+// partially written blocks.
+func NewEncoder(enc *Encoding, w io.Writer) io.WriteCloser {
+ return &encoder{enc: enc, w: w};
+}
+
+// EncodedLen returns the length in bytes of the base64 encoding
+// of an input buffer of length n.
+func (enc *Encoding) EncodedLen(n int) int {
+ return (n+2)/3*4;
+}
+
+/*
+ * Decoder
+ */
+
+type CorruptInputError int64
+
+func (e CorruptInputError) String() string {
+ return "illegal base64 data at input byte" + strconv.Itoa64(int64(e));
+}
+
+// decode is like Decode but returns an additional 'end' value, which
+// indicates if end-of-message padding was encountered and thus any
+// additional data is an error. decode also assumes len(src)%4==0,
+// since it is meant for internal use.
+func (enc *Encoding) decode(src, dst []byte) (n int, end bool, err os.Error) {
+ for i := 0; i < len(src)/4 && !end; i++ {
+ // Decode quantum using the base64 alphabet
+ var dbuf [4]byte;
+ dlen := 4;
+
+ dbufloop:
+ for j := 0; j < 4; j++ {
+ in := src[i*4 + j];
+ if in == '=' && j >= 2 && i == len(src)/4 - 1 {
+ // We've reached the end and there's
+ // padding
+ if src[i*4 + 3] != '=' {
+ return n, false, CorruptInputError(i*4 + 2);
+ }
+ dlen = j;
+ end = true;
+ break dbufloop;
+ }
+ dbuf[j] = enc.decodeMap[in];
+ if dbuf[j] == 0xFF {
+ return n, false, CorruptInputError(i*4 + j);
+ }
+ }
+
+ // Pack 4x 6-bit source blocks into 3 byte destination
+ // quantum
+ switch dlen {
+ case 4:
+ dst[i*3 + 2] = dbuf[2]<<6 | dbuf[3];
+ fallthrough;
+ case 3:
+ dst[i*3 + 1] = dbuf[1]<<4 | dbuf[2]>>2;
+ fallthrough;
+ case 2:
+ dst[i*3 + 0] = dbuf[0]<<2 | dbuf[1]>>4;
+ }
+ n += dlen-1;
+ }
+
+ return n, end, nil;
+}
+
+// Decode decodes src using the encoding enc. It writes at most
+// DecodedLen(len(src)) bytes to dst and returns the number of bytes
+// written. If src contains invalid base64 data, it will return the
+// number of bytes successfully written and CorruptInputError.
+func (enc *Encoding) Decode(src, dst []byte) (n int, err os.Error) {
+ if len(src)%4 != 0 {
+ return 0, CorruptInputError(len(src)/4*4);
+ }
+
+ n, _, err = enc.decode(src, dst);
+ return;
+}
+
+type decoder struct {
+ err os.Error;
+ enc *Encoding;
+ r io.Reader;
+ end bool; // saw end of message
+ buf [1024]byte; // leftover input
+ nbuf int;
+ out []byte; // leftover decoded output
+ outbuf [1024/4*3]byte;
+}
+
+func (d *decoder) Read(p []byte) (n int, err os.Error) {
+ if d.err != nil {
+ return 0, d.err;
+ }
+
+ // Use leftover decoded output from last read.
+ if len(d.out) > 0 {
+ n = bytes.Copy(p, d.out);
+ d.out = d.out[n:len(d.out)];
+ return n, nil;
+ }
+
+ // Read a chunk.
+ nn := len(p)/3*4;
+ if nn < 4 {
+ nn = 4;
+ }
+ if nn > len(d.buf) {
+ nn = len(d.buf);
+ }
+ nn, d.err = io.ReadAtLeast(d.r, d.buf[d.nbuf : nn], 4 - d.nbuf);
+ d.nbuf += nn;
+ if d.nbuf < 4 {
+ return 0, d.err;
+ }
+
+ // Decode chunk into p, or d.out and then p if p is too small.
+ nr := d.nbuf / 4 * 4;
+ nw := d.nbuf / 4 * 3;
+ if nw > len(p) {
+ nw, d.end, d.err = d.enc.decode(d.buf[0:nr], &d.outbuf);
+ d.out = d.outbuf[0:nw];
+ n = bytes.Copy(p, d.out);
+ d.out = d.out[n:len(d.out)];
+ } else {
+ n, d.end, d.err = d.enc.decode(d.buf[0:nr], p);
+ }
+ d.nbuf -= nr;
+ for i := 0; i < d.nbuf; i++ {
+ d.buf[i] = d.buf[i+nr];
+ }
+
+ if d.err == nil {
+ d.err = err;
+ }
+ return n, d.err;
+}
+
+// NewDecoder constructs a new base64 stream decoder.
+func NewDecoder(enc *Encoding, r io.Reader) io.Reader {
+ return &decoder{enc: enc, r: r};
+}
+
+// DecodeLen returns the maximum length in bytes of the decoded data
+// corresponding to n bytes of base64-encoded data.
+func (enc *Encoding) DecodedLen(n int) int {
+ return n/4*3;
+}
--- /dev/null
+// 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 base64
+
+import (
+ "bytes";
+ "io";
+ "os";
+ "reflect";
+ "strings";
+ "testing";
+)
+
+type testpair struct {
+ decoded, encoded string;
+}
+
+var pairs = []testpair{
+ // RFC 3548 examples
+ testpair{"\x14\xfb\x9c\x03\xd9\x7e", "FPucA9l+"},
+ testpair{"\x14\xfb\x9c\x03\xd9", "FPucA9k="},
+ testpair{"\x14\xfb\x9c\x03", "FPucAw=="},
+
+ // RFC 4648 examples
+ testpair{"", ""},
+ testpair{"f", "Zg=="},
+ testpair{"fo", "Zm8="},
+ testpair{"foo", "Zm9v"},
+ testpair{"foob", "Zm9vYg=="},
+ testpair{"fooba", "Zm9vYmE="},
+ testpair{"foobar", "Zm9vYmFy"},
+
+ // Wikipedia examples
+ testpair{"sure.", "c3VyZS4="},
+ testpair{"sure", "c3VyZQ=="},
+ testpair{"sur", "c3Vy"},
+ testpair{"su", "c3U="},
+ testpair{"leasure.", "bGVhc3VyZS4="},
+ testpair{"easure.", "ZWFzdXJlLg=="},
+ testpair{"asure.", "YXN1cmUu"},
+ testpair{"sure.", "c3VyZS4="},
+}
+
+var bigtest = testpair{
+ "Twas brillig, and the slithy toves",
+ "VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==",
+}
+
+func testEqual(t *testing.T, msg string, args ...) bool {
+ v := reflect.NewValue(args).(*reflect.StructValue);
+ v1 := v.Field(v.NumField() - 2);
+ v2 := v.Field(v.NumField() - 1);
+ if v1.Interface() != v2.Interface() {
+ t.Errorf(msg, args);
+ return false;
+ }
+ return true;
+}
+
+func TestEncode(t *testing.T) {
+ for _, p := range pairs {
+ buf := make([]byte, StdEncoding.EncodedLen(len(p.decoded)));
+ StdEncoding.Encode(strings.Bytes(p.decoded), buf);
+ testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded);
+ }
+}
+
+func TestEncoder(t *testing.T) {
+ for _, p := range pairs {
+ bb := &bytes.Buffer{};
+ encoder := NewEncoder(StdEncoding, bb);
+ encoder.Write(strings.Bytes(p.decoded));
+ encoder.Close();
+ testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded);
+ }
+}
+
+func TestEncoderBuffering(t *testing.T) {
+ input := strings.Bytes(bigtest.decoded);
+ for bs := 1; bs <= 12; bs++ {
+ bb := &bytes.Buffer{};
+ encoder := NewEncoder(StdEncoding, bb);
+ for pos := 0; pos < len(input); pos += bs {
+ end := pos+bs;
+ if end > len(input) {
+ end = len(input);
+ }
+ n, err := encoder.Write(input[pos:end]);
+ testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, os.Error(nil));
+ testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos);
+ }
+ err := encoder.Close();
+ testEqual(t, "Close gave error %v, want %v", err, os.Error(nil));
+ testEqual(t, "Encoding/%d of %q = %q, want %q", bs, bigtest.decoded, bb.String(), bigtest.encoded);
+ }
+}
+
+func TestDecode(t *testing.T) {
+ for _, p := range pairs {
+ dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
+ count, end, err := StdEncoding.decode(strings.Bytes(p.encoded), dbuf);
+ testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil));
+ testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded));
+ if len(p.encoded) > 0 {
+ testEqual(t, "Decode(%q) = end %v, want %v", p.encoded, end, (p.encoded[len(p.encoded)-1] == '='));
+ }
+ testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded);
+ }
+}
+
+func TestDecoder(t *testing.T) {
+ for _, p := range pairs {
+ decoder := NewDecoder(StdEncoding, bytes.NewBufferString(p.encoded));
+ dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
+ count, err := decoder.Read(dbuf);
+ if err != nil && err != os.EOF {
+ t.Fatal("Read failed", err);
+ }
+ testEqual(t, "Read from %q = length %v, want %v", p.encoded, count, len(p.decoded));
+ testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded);
+ if err != os.EOF {
+ count, err = decoder.Read(dbuf);
+ }
+ testEqual(t, "Read from %q = %v, want %v", p.encoded, err, os.EOF);
+ }
+}
+
+func TestDecoderBuffering(t *testing.T) {
+ for bs := 1; bs <= 12; bs++ {
+ decoder := NewDecoder(StdEncoding, bytes.NewBufferString(bigtest.encoded));
+ buf := make([]byte, len(bigtest.decoded)+12);
+ var total int;
+ for total = 0; total < len(bigtest.decoded); {
+ n, err := decoder.Read(buf[total : total+bs]);
+ testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", bigtest.encoded, total, n, err, os.Error(nil));
+ total += n;
+ }
+ testEqual(t, "Decoding/%d of %q = %q, want %q", bs, bigtest.encoded, string(buf[0:total]), bigtest.decoded);
+ }
+}
+
+func TestDecodeCorrupt(t *testing.T) {
+ type corrupt struct {
+ e string;
+ p int;
+ }
+ examples := []corrupt{
+ corrupt{"!!!!", 0},
+ corrupt{"x===", 1},
+ corrupt{"AA=A", 2},
+ corrupt{"AAA=AAAA", 3},
+ corrupt{"AAAAA", 4},
+ corrupt{"AAAAAA", 4},
+ };
+
+ for _, e := range examples {
+ dbuf := make([]byte, StdEncoding.DecodedLen(len(e.e)));
+ _, err := StdEncoding.Decode(strings.Bytes(e.e), dbuf);
+ switch err := err.(type) {
+ case CorruptInputError:
+ testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p);
+ default:
+ t.Error("Decoder failed to detect corruption in", e);
+ }
+ }
+}
+
+func TestBig(t *testing.T) {
+ n := 3*1000 + 1;
+ raw := make([]byte, n);
+ const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ for i := 0; i < n; i++ {
+ raw[i] = alpha[i%len(alpha)];
+ }
+ encoded := new(bytes.Buffer);
+ w := NewEncoder(StdEncoding, encoded);
+ nn, err := w.Write(raw);
+ if nn != n || err != nil {
+ t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n);
+ }
+ err = w.Close();
+ if err != nil {
+ t.Fatalf("Encoder.Close() = %v want nil", err);
+ }
+ decoded, err := io.ReadAll(NewDecoder(StdEncoding, encoded));
+ if err != nil {
+ t.Fatalf("io.ReadAll(NewDecoder(...)): %v", err);
+ }
+
+ if !bytes.Equal(raw, decoded) {
+ var i int;
+ for i = 0; i < len(decoded) && i < len(raw); i++ {
+ if decoded[i] != raw[i] {
+ break;
+ }
+ }
+ t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i);
+ }
+}
include $(GOROOT)/src/Make.$(GOARCH)
-TARG=debug/binary
+TARG=encoding/binary
GOFILES=\
binary.go\
include $(GOROOT)/src/Make.$(GOARCH)
-TARG=base85
+TARG=encoding/git85
GOFILES=\
- base85.go\
git.go\
include $(GOROOT)/src/Make.pkg
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-package base85
+// Package git85 implements the radix 85 data encoding
+// used in the GIT version control system.
+package git85
import (
"bytes";
"io";
"os";
+ "strconv";
)
-const gitEncode = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~"
+type CorruptInputError int64
+
+func (e CorruptInputError) String() string {
+ return "illegal git85 data at input byte" + strconv.Itoa64(int64(e));
+}
+
+const encode = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~"
// The decodings are 1+ the actual value, so that the
// default zero value can be used to mean "not valid".
-var gitDecode = [256]uint8{
+var decode = [256]uint8{
'0': 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
'A': 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
'{': 82, 83, 84, 85
}
-// GitEncode encodes src into GitEncodedLen(len(src))
+// Encode encodes src into EncodedLen(len(src))
// bytes of dst. As a convenience, it returns the number
-// of bytes written to dst, but this value is always GitEncodedLen(len(src)).
-// GitEncode implements the radix 85 encoding used in the
+// of bytes written to dst, but this value is always EncodedLen(len(src)).
+// Encode implements the radix 85 encoding used in the
// Git version control tool.
//
// The encoding splits src into chunks of at most 52 bytes
// and encodes each chunk on its own line.
-func GitEncode(src, dst []byte) int {
+func Encode(src, dst []byte) int {
ndst := 0;
for len(src) > 0 {
n := len(src);
v |= uint32(src[i+j]) << uint(24 - j*8);
}
for j := 4; j >= 0; j-- {
- dst[ndst+j] = gitEncode[v%85];
+ dst[ndst+j] = encode[v%85];
v /= 85;
}
ndst += 5;
return ndst;
}
-// GitEncodedLen returns the length of an encoding of n source bytes.
-func GitEncodedLen(n int) int {
+// EncodedLen returns the length of an encoding of n source bytes.
+func EncodedLen(n int) int {
if n == 0 {
return 0;
}
var newline = []byte{'\n'}
-// GitDecode decodes src into at most MaxGitDecodedLen(len(src))
+// Decode decodes src into at most MaxDecodedLen(len(src))
// bytes, returning the actual number of bytes written to dst.
//
-// If GitDecode encounters invalid input, it returns a CorruptInputError.
+// If Decode encounters invalid input, it returns a CorruptInputError.
//
-func GitDecode(src, dst []byte) (n int, err os.Error) {
+func Decode(src, dst []byte) (n int, err os.Error) {
ndst := 0;
nsrc := 0;
for nsrc < len(src) {
for i := 0; i < el; i += 5 {
var v uint32;
for j := 0; j < 5; j++ {
- ch := gitDecode[line[i+j]];
+ ch := decode[line[i+j]];
if ch == 0 {
return ndst, CorruptInputError(nsrc+1+i+j);
}
return ndst, nil;
}
-func MaxGitDecodedLen(n int) int {
+func MaxDecodedLen(n int) int {
return n/5*4;
}
// The Git encoding operates on 52-byte blocks; when finished
// writing, the caller must Close the returned encoder to flush any
// partially written blocks.
-func NewGitEncoder(w io.Writer) io.WriteCloser {
- return &gitEncoder{w: w};
+func NewEncoder(w io.Writer) io.WriteCloser {
+ return &encoder{w: w};
}
-type gitEncoder struct {
+type encoder struct {
w io.Writer;
err os.Error;
buf [52]byte;
nout int;
}
-func (e *gitEncoder) Write(p []byte) (n int, err os.Error) {
+func (e *encoder) Write(p []byte) (n int, err os.Error) {
if e.err != nil {
return 0, e.err;
}
if e.nbuf < 52 {
return;
}
- nout := GitEncode(&e.buf, &e.out);
+ nout := Encode(&e.buf, &e.out);
if _, e.err = e.w.Write(e.out[0:nout]); e.err != nil {
return n, e.err;
}
nn = len(p)/52 * 52;
}
if nn > 0 {
- nout := GitEncode(p[0:nn], &e.out);
+ nout := Encode(p[0:nn], &e.out);
if _, e.err = e.w.Write(e.out[0:nout]); e.err != nil {
return n, e.err;
}
return;
}
-func (e *gitEncoder) Close() os.Error {
+func (e *encoder) Close() os.Error {
// If there's anything left in the buffer, flush it out
if e.err == nil && e.nbuf > 0 {
- nout := GitEncode(e.buf[0:e.nbuf], &e.out);
+ nout := Encode(e.buf[0:e.nbuf], &e.out);
e.nbuf = 0;
_, e.err = e.w.Write(e.out[0:nout]);
}
return e.err;
}
-// NewGitDecoder returns a new Git base85 stream decoder.
-func NewGitDecoder(r io.Reader) io.Reader {
- return &gitDecoder{r: r};
+// NewDecoder returns a new Git base85 stream decoder.
+func NewDecoder(r io.Reader) io.Reader {
+ return &decoder{r: r};
}
-type gitDecoder struct {
+type decoder struct {
r io.Reader;
err os.Error;
readErr os.Error;
off int64;
}
-func (d *gitDecoder) Read(p []byte) (n int, err os.Error) {
+func (d *decoder) Read(p []byte) (n int, err os.Error) {
if len(p) == 0 {
return 0, nil;
}
nn, d.readErr = d.r.Read(d.buf[d.nbuf:len(d.buf)]);
d.nbuf += nn;
- // Send complete lines to GitDecode.
+ // Send complete lines to Decode.
nl := bytes.LastIndex(d.buf[0:d.nbuf], newline);
if nl < 0 {
continue;
}
- nn, d.err = GitDecode(d.buf[0:nl+1], &d.outbuf);
+ nn, d.err = Decode(d.buf[0:nl+1], &d.outbuf);
if e, ok := d.err.(CorruptInputError); ok {
d.err = CorruptInputError(int64(e)+d.off);
}
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-package base85
+package git85
import (
"bytes";
"io";
"os";
+ "reflect";
"strings";
"testing";
)
+type testpair struct {
+ decoded, encoded string;
+}
+
+func testEqual(t *testing.T, msg string, args ...) bool {
+ v := reflect.NewValue(args).(*reflect.StructValue);
+ v1 := v.Field(v.NumField() - 2);
+ v2 := v.Field(v.NumField() - 1);
+ if v1.Interface() != v2.Interface() {
+ t.Errorf(msg, args);
+ return false;
+ }
+ return true;
+}
+
func TestGitTable(t *testing.T) {
var saw [256]bool;
- for i, c := range gitEncode {
- if gitDecode[c] != uint8(i+1) {
- t.Errorf("gitDecode['%c'] = %d, want %d", c, gitDecode[c], i+1);
+ for i, c := range encode {
+ if decode[c] != uint8(i+1) {
+ t.Errorf("decode['%c'] = %d, want %d", c, decode[c], i+1);
}
saw[c] = true;
}
for i, b := range saw {
- if !b && gitDecode[i] != 0 {
- t.Errorf("gitDecode[%d] = %d, want 0", i, gitDecode[i]);
+ if !b && decode[i] != 0 {
+ t.Errorf("decode[%d] = %d, want 0", i, decode[i]);
}
}
}
var gitBigtest = gitPairs[len(gitPairs)-1];
-func TestGitEncode(t *testing.T) {
+func TestEncode(t *testing.T) {
for _, p := range gitPairs {
- buf := make([]byte, GitEncodedLen(len(p.decoded)));
- n := GitEncode(strings.Bytes(p.decoded), buf);
+ buf := make([]byte, EncodedLen(len(p.decoded)));
+ n := Encode(strings.Bytes(p.decoded), buf);
if n != len(buf) {
- t.Errorf("GitEncodedLen does not agree with GitEncode");
+ t.Errorf("EncodedLen does not agree with Encode");
}
buf = buf[0:n];
- testEqual(t, "GitEncode(%q) = %q, want %q", p.decoded, string(buf), p.encoded);
+ testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded);
}
}
-func TestGitEncoder(t *testing.T) {
+func TestEncoder(t *testing.T) {
for _, p := range gitPairs {
bb := &bytes.Buffer{};
- encoder := NewGitEncoder(bb);
+ encoder := NewEncoder(bb);
encoder.Write(strings.Bytes(p.decoded));
encoder.Close();
- testEqual(t, "GitEncode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded);
+ testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded);
}
}
-func TestGitEncoderBuffering(t *testing.T) {
+func TestEncoderBuffering(t *testing.T) {
input := strings.Bytes(gitBigtest.decoded);
for bs := 1; bs <= 12; bs++ {
bb := &bytes.Buffer{};
- encoder := NewGitEncoder(bb);
+ encoder := NewEncoder(bb);
for pos := 0; pos < len(input); pos += bs {
end := pos+bs;
if end > len(input) {
}
}
-func TestGitDecode(t *testing.T) {
+func TestDecode(t *testing.T) {
for _, p := range gitPairs {
dbuf := make([]byte, 4*len(p.encoded));
- ndst, err := GitDecode(strings.Bytes(p.encoded), dbuf);
- testEqual(t, "GitDecode(%q) = error %v, want %v", p.encoded, err, os.Error(nil));
- testEqual(t, "GitDecode(%q) = ndst %v, want %v", p.encoded, ndst, len(p.decoded));
- testEqual(t, "GitDecode(%q) = %q, want %q", p.encoded, string(dbuf[0:ndst]), p.decoded);
+ ndst, err := Decode(strings.Bytes(p.encoded), dbuf);
+ testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil));
+ testEqual(t, "Decode(%q) = ndst %v, want %v", p.encoded, ndst, len(p.decoded));
+ testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:ndst]), p.decoded);
}
}
-func TestGitDecoder(t *testing.T) {
+func TestDecoder(t *testing.T) {
for _, p := range gitPairs {
- decoder := NewGitDecoder(bytes.NewBufferString(p.encoded));
+ decoder := NewDecoder(bytes.NewBufferString(p.encoded));
dbuf, err := io.ReadAll(decoder);
if err != nil {
t.Fatal("Read failed", err);
}
}
-func TestGitDecoderBuffering(t *testing.T) {
+func TestDecoderBuffering(t *testing.T) {
for bs := 1; bs <= 12; bs++ {
- decoder := NewGitDecoder(bytes.NewBufferString(gitBigtest.encoded));
+ decoder := NewDecoder(bytes.NewBufferString(gitBigtest.encoded));
buf := make([]byte, len(gitBigtest.decoded)+12);
var total int;
for total = 0; total < len(gitBigtest.decoded); {
}
}
-func TestGitDecodeCorrupt(t *testing.T) {
+func TestDecodeCorrupt(t *testing.T) {
type corrupt struct {
e string;
p int;
for _, e := range examples {
dbuf := make([]byte, 2*len(e.e));
- _, err := GitDecode(strings.Bytes(e.e), dbuf);
+ _, err := Decode(strings.Bytes(e.e), dbuf);
switch err := err.(type) {
case CorruptInputError:
testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p);
default:
- t.Error("GitDecoder failed to detect corruption in", e);
+ t.Error("Decoder failed to detect corruption in", e);
}
}
}
raw[i] = alpha[i%len(alpha)];
}
encoded := new(bytes.Buffer);
- w := NewGitEncoder(encoded);
+ w := NewEncoder(encoded);
nn, err := w.Write(raw);
if nn != n || err != nil {
- t.Fatalf("GitEncoder.Write(raw) = %d, %v want %d, nil", nn, err, n);
+ t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n);
}
err = w.Close();
if err != nil {
- t.Fatalf("GitEncoder.Close() = %v want nil", err);
+ t.Fatalf("Encoder.Close() = %v want nil", err);
}
- decoded, err := io.ReadAll(NewGitDecoder(encoded));
+ decoded, err := io.ReadAll(NewDecoder(encoded));
if err != nil {
- t.Fatalf("io.ReadAll(NewGitDecoder(...)): %v", err);
+ t.Fatalf("io.ReadAll(NewDecoder(...)): %v", err);
}
if !bytes.Equal(raw, decoded) {
break;
}
}
- t.Errorf("GitDecode(GitEncode(%d-byte string)) failed at offset %d", n, i);
+ t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i);
}
}