mirror of
https://github.com/golang/go
synced 2024-11-22 08:44:41 -07:00
Make printing faster by avoiding mallocs and some other advances.
Roughly 33% faster for simple cases, probably more for complex ones.
Before:
mallocs per Sprintf(""): 4
mallocs per Sprintf("xxx"): 6
mallocs per Sprintf("%x"): 10
mallocs per Sprintf("%x %x"): 12
Now:
mallocs per Sprintf(""): 2
mallocs per Sprintf("xxx"): 3
mallocs per Sprintf("%x"): 5
mallocs per Sprintf("%x %x"): 7
Speed improves because of avoiding mallocs and also by sharing a bytes.Buffer
between print.go and format.go rather than copying the data back after each
printed item.
Before:
fmt_test.BenchmarkSprintfEmpty 1000000 1346 ns/op
fmt_test.BenchmarkSprintfString 500000 3461 ns/op
fmt_test.BenchmarkSprintfInt 500000 3671 ns/op
Now:
fmt_test.BenchmarkSprintfEmpty 2000000 995 ns/op
fmt_test.BenchmarkSprintfString 1000000 2745 ns/op
fmt_test.BenchmarkSprintfInt 1000000 2391 ns/op
fmt_test.BenchmarkSprintfIntInt 500000 3751 ns/op
I believe there is more to get but this is a good milestone.
R=rsc
CC=golang-dev, hong
https://golang.org/cl/166076
This commit is contained in:
Rob Pike
parent
ed6fd1bcbe
commit
4c0e51cd43
@ -35,6 +35,7 @@ type Buffer struct {
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buf []byte; // contents are the bytes buf[off : len(buf)]
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off int; // read at &buf[off], write at &buf[len(buf)]
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oneByte [1]byte; // avoid allocation of slice on each WriteByte
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bootstrap [64]byte; // memory to hold first slice; helps small buffers (Printf) avoid allocation.
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}
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// Bytes returns the contents of the unread portion of the buffer;
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@ -69,29 +70,51 @@ func (b *Buffer) Truncate(n int) {
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// b.Reset() is the same as b.Truncate(0).
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func (b *Buffer) Reset() { b.Truncate(0) }
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// Resize buffer to guarantee enough space for n more bytes.
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// After this call, the state of b.buf is inconsistent.
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// It must be fixed up as is done in Write and WriteString.
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func (b *Buffer) resize(n int) {
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var buf []byte;
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if b.buf == nil && n <= len(b.bootstrap) {
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buf = &b.bootstrap
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} else {
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buf = b.buf;
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if len(b.buf)+n > cap(b.buf) {
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// not enough space anywhere
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buf = make([]byte, 2*cap(b.buf)+n)
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}
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copy(buf, b.buf[b.off:]);
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}
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b.buf = buf;
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b.off = 0;
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}
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// Write appends the contents of p to the buffer. The return
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// value n is the length of p; err is always nil.
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func (b *Buffer) Write(p []byte) (n int, err os.Error) {
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m := b.Len();
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n = len(p);
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if len(b.buf)+n > cap(b.buf) {
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// not enough space at end
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buf := b.buf;
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if m+n > cap(b.buf) {
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// not enough space anywhere
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buf = make([]byte, 2*cap(b.buf)+n)
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b.resize(n)
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}
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copyBytes(buf, 0, b.buf[b.off:b.off+m]);
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b.buf = buf;
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b.off = 0;
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}
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b.buf = b.buf[0 : b.off+m+n];
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copyBytes(b.buf, b.off+m, p);
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return n, nil;
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}
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// WriteString appends the contents of s to the buffer. The return
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// value n is the length of s; err is always nil.
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func (b *Buffer) WriteString(s string) (n int, err os.Error) {
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m := b.Len();
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n = len(s);
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if len(b.buf)+n > cap(b.buf) {
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b.resize(n)
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}
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b.buf = b.buf[0 : b.off+m+n];
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copyString(b.buf, b.off+m, s);
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return n, nil;
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}
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// MinRead is the minimum slice size passed to a Read call by
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// Buffer.ReadFrom. As long as the Buffer has at least MinRead bytes beyond
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// what is required to hold the contents of r, ReadFrom will not grow the
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@ -146,29 +169,6 @@ func (b *Buffer) WriteTo(w io.Writer) (n int64, err os.Error) {
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return;
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}
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// WriteString appends the contents of s to the buffer. The return
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// value n is the length of s; err is always nil.
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func (b *Buffer) WriteString(s string) (n int, err os.Error) {
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m := b.Len();
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n = len(s);
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if len(b.buf)+n > cap(b.buf) {
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// not enough space at end
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buf := b.buf;
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if m+n > cap(b.buf) {
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// not enough space anywhere
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buf = make([]byte, 2*cap(b.buf)+n)
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}
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copyBytes(buf, 0, b.buf[b.off:b.off+m]);
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b.buf = buf;
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b.off = 0;
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}
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b.buf = b.buf[0 : b.off+m+n];
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copyString(b.buf, b.off+m, s);
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return n, nil;
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}
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// WriteByte appends the byte c to the buffer.
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// The returned error is always nil, but is included
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// to match bufio.Writer's WriteByte.
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@ -7,6 +7,7 @@ package fmt_test
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import (
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. "fmt";
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"io";
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"malloc"; // for the malloc count test only
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"math";
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"strings";
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"testing";
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@ -242,7 +243,7 @@ func TestSprintf(t *testing.T) {
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if _, ok := tt.val.(string); ok {
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// Don't requote the already-quoted strings.
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// It's too confusing to read the errors.
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t.Errorf("Sprintf(%q, %q) = %s want %s", tt.fmt, tt.val, s, tt.out)
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t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out)
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} else {
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t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out)
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}
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@ -268,6 +269,39 @@ func BenchmarkSprintfInt(b *testing.B) {
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}
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}
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func BenchmarkSprintfIntInt(b *testing.B) {
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for i := 0; i < b.N; i++ {
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Sprintf("%d %d", 5, 6)
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}
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}
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func TestCountMallocs(t *testing.T) {
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mallocs := 0 - malloc.GetStats().Mallocs;
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for i := 0; i < 100; i++ {
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Sprintf("")
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}
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mallocs += malloc.GetStats().Mallocs;
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Printf("mallocs per Sprintf(\"\"): %d\n", mallocs/100);
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mallocs = 0 - malloc.GetStats().Mallocs;
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for i := 0; i < 100; i++ {
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Sprintf("xxx")
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}
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mallocs += malloc.GetStats().Mallocs;
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Printf("mallocs per Sprintf(\"xxx\"): %d\n", mallocs/100);
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mallocs = 0 - malloc.GetStats().Mallocs;
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for i := 0; i < 100; i++ {
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Sprintf("%x", i)
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}
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mallocs += malloc.GetStats().Mallocs;
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Printf("mallocs per Sprintf(\"%%x\"): %d\n", mallocs/100);
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mallocs = 0 - malloc.GetStats().Mallocs;
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for i := 0; i < 100; i++ {
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Sprintf("%x %x", i, i)
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}
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mallocs += malloc.GetStats().Mallocs;
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Printf("mallocs per Sprintf(\"%%x %%x\"): %d\n", mallocs/100);
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}
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type flagPrinter struct{}
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func (*flagPrinter) Format(f State, c int) {
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@ -5,6 +5,7 @@
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package fmt
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import (
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"bytes";
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"strconv";
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)
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@ -16,34 +17,30 @@ const (
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udigits = "0123456789ABCDEF";
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)
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const padZeros = "0000000000000000000000000000000000000000000000000000000000000000"
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const padSpaces = " "
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var padZeroBytes = make([]byte, nByte)
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var padSpaceBytes = make([]byte, nByte)
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var newline = []byte{'\n'}
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func init() {
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if len(padZeros) != nByte || len(padSpaces) != nByte {
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panic("fmt padding wrong length")
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for i := 0; i < nByte; i++ {
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padZeroBytes[i] = '0';
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padSpaceBytes[i] = ' ';
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}
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}
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/*
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Fmt is the raw formatter used by Printf etc. Not meant for normal use.
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It prints into a bytes.Buffer that must be set up externally.
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See print.go for a more palatable interface.
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The model is to accumulate operands into an internal buffer and then
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retrieve the buffer in one hit using Str(), Putnl(), etc. The formatting
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methods return ``self'' so the operations can be chained.
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f := fmt.New();
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print(f.Fmt_d(1234).Fmt_s("\n").Str()); // create string, print it
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f.Fmt_d(-1234).Fmt_s("\n").Put(); // print string
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f.Fmt_ud(1<<63).Putnl(); // print string with automatic newline
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*/
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type Fmt struct {
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buf string;
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intbuf [nByte]byte;
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buf *bytes.Buffer;
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wid int;
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wid_present bool;
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widPresent bool;
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prec int;
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prec_present bool;
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precPresent bool;
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// flags
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minus bool;
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plus bool;
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@ -52,11 +49,11 @@ type Fmt struct {
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zero bool;
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}
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func (f *Fmt) clearflags() {
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func (f *Fmt) ClearFlags() {
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f.wid = 0;
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f.wid_present = false;
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f.widPresent = false;
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f.prec = 0;
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f.prec_present = false;
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f.precPresent = false;
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f.minus = false;
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f.plus = false;
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f.sharp = false;
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@ -64,94 +61,98 @@ func (f *Fmt) clearflags() {
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f.zero = false;
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}
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func (f *Fmt) clearbuf() { f.buf = "" }
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func (f *Fmt) init() {
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f.clearbuf();
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f.clearflags();
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func (f *Fmt) Init(buf *bytes.Buffer) {
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f.buf = buf;
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f.ClearFlags();
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}
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// New returns a new initialized Fmt
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func New() *Fmt {
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f := new(Fmt);
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f.init();
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return f;
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}
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// Str returns the buffered contents as a string and resets the Fmt.
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func (f *Fmt) Str() string {
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s := f.buf;
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f.clearbuf();
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f.clearflags();
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f.buf = "";
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return s;
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}
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// Put writes the buffered contents to stdout and resets the Fmt.
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func (f *Fmt) Put() {
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print(f.buf);
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f.clearbuf();
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f.clearflags();
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}
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// Putnl writes the buffered contents to stdout, followed by a newline, and resets the Fmt.
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func (f *Fmt) Putnl() {
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print(f.buf, "\n");
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f.clearbuf();
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f.clearflags();
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}
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func (f *Fmt) Reset() { f.ClearFlags() }
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// Wp sets the width and precision for formatting the next item.
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func (f *Fmt) Wp(w, p int) *Fmt {
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f.wid_present = true;
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func (f *Fmt) Wp(w, p int) {
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f.widPresent = true;
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f.wid = w;
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f.prec_present = true;
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f.precPresent = true;
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f.prec = p;
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return f;
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}
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// P sets the precision for formatting the next item.
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func (f *Fmt) P(p int) *Fmt {
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f.prec_present = true;
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func (f *Fmt) P(p int) {
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f.precPresent = true;
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f.prec = p;
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return f;
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}
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// W sets the width for formatting the next item.
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func (f *Fmt) W(x int) *Fmt {
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f.wid_present = true;
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func (f *Fmt) W(x int) {
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f.widPresent = true;
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f.wid = x;
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return f;
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}
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// append s to buf, padded on left (w > 0) or right (w < 0 or f.minus)
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// padding is in bytes, not characters (agrees with ANSIC C, not Plan 9 C)
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func (f *Fmt) pad(s string) {
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if f.wid_present && f.wid != 0 {
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// Compute left and right padding widths (only one will be non-zero).
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func (f *Fmt) computePadding(width int) (padding []byte, leftWidth, rightWidth int) {
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left := !f.minus;
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w := f.wid;
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if w < 0 {
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left = false;
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w = -w;
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}
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w -= len(s);
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padding := padSpaces;
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if left && f.zero {
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padding = padZeros
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}
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w -= width;
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if w > 0 {
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if w > nByte {
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w = nByte
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if left && f.zero {
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return padZeroBytes, w, 0
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}
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padding = padding[0:w];
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if left {
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s = padding + s
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return padSpaceBytes, w, 0
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} else {
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s += padding
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// can't be zero padding on the right
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return padSpaceBytes, 0, w
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}
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}
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return;
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}
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// Generate n bytes of padding.
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func (f *Fmt) writePadding(n int, padding []byte) {
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for n > 0 {
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m := n;
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if m > nByte {
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m = nByte
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}
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f.buf.Write(padding[0:m]);
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n -= m;
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}
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}
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// Append b to f.buf, padded on left (w > 0) or right (w < 0 or f.minus)
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func (f *Fmt) padBytes(b []byte) {
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var padding []byte;
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var left, right int;
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if f.widPresent && f.wid != 0 {
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padding, left, right = f.computePadding(len(b))
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}
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if left > 0 {
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f.writePadding(left, padding)
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}
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f.buf.Write(b);
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if right > 0 {
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f.writePadding(right, padding)
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}
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}
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// append s to buf, padded on left (w > 0) or right (w < 0 or f.minus)
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func (f *Fmt) pad(s string) {
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var padding []byte;
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var left, right int;
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if f.widPresent && f.wid != 0 {
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padding, left, right = f.computePadding(len(s))
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}
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if left > 0 {
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f.writePadding(left, padding)
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}
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f.buf.WriteString(s);
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if right > 0 {
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f.writePadding(right, padding)
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}
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f.buf += s;
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}
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// format val into buf, ending at buf[i]. (printing is easier right-to-left;
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@ -171,19 +172,18 @@ func putint(buf []byte, base, val uint64, digits string) int {
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}
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// Fmt_boolean formats a boolean.
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func (f *Fmt) Fmt_boolean(v bool) *Fmt {
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func (f *Fmt) Fmt_boolean(v bool) {
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if v {
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f.pad("true")
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} else {
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f.pad("false")
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}
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f.clearflags();
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return f;
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f.ClearFlags();
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}
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// integer; interprets prec but not wid.
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func (f *Fmt) integer(a int64, base uint, is_signed bool, digits string) string {
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var buf [nByte]byte;
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func (f *Fmt) integer(a int64, base uint, is_signed bool, digits string) []byte {
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var buf []byte = &f.intbuf;
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negative := is_signed && a < 0;
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if negative {
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a = -a
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@ -192,17 +192,17 @@ func (f *Fmt) integer(a int64, base uint, is_signed bool, digits string) string
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// two ways to ask for extra leading zero digits: %.3d or %03d.
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// apparently the first cancels the second.
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prec := 0;
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if f.prec_present {
|
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if f.precPresent {
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prec = f.prec;
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f.zero = false;
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} else if f.zero && f.wid_present && !f.minus && f.wid > 0 {
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} else if f.zero && f.widPresent && !f.minus && f.wid > 0 {
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prec = f.wid;
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if negative || f.plus || f.space {
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prec-- // leave room for sign
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}
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}
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i := putint(&buf, uint64(base), uint64(a), digits);
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i := putint(buf, uint64(base), uint64(a), digits);
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for i > 0 && prec > (nByte-1-i) {
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buf[i] = '0';
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i--;
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@ -233,147 +233,137 @@ func (f *Fmt) integer(a int64, base uint, is_signed bool, digits string) string
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buf[i] = ' ';
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i--;
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}
|
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return string(buf[i+1 : nByte]);
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return buf[i+1 : nByte];
|
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}
|
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|
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// Fmt_d64 formats an int64 in decimal.
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func (f *Fmt) Fmt_d64(v int64) *Fmt {
|
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f.pad(f.integer(v, 10, true, ldigits));
|
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f.clearflags();
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return f;
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func (f *Fmt) Fmt_d64(v int64) {
|
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f.padBytes(f.integer(v, 10, true, ldigits));
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f.ClearFlags();
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}
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|
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// Fmt_d32 formats an int32 in decimal.
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func (f *Fmt) Fmt_d32(v int32) *Fmt { return f.Fmt_d64(int64(v)) }
|
||||
func (f *Fmt) Fmt_d32(v int32) { f.Fmt_d64(int64(v)) }
|
||||
|
||||
// Fmt_d formats an int in decimal.
|
||||
func (f *Fmt) Fmt_d(v int) *Fmt { return f.Fmt_d64(int64(v)) }
|
||||
func (f *Fmt) Fmt_d(v int) { f.Fmt_d64(int64(v)) }
|
||||
|
||||
// Fmt_ud64 formats a uint64 in decimal.
|
||||
func (f *Fmt) Fmt_ud64(v uint64) *Fmt {
|
||||
f.pad(f.integer(int64(v), 10, false, ldigits));
|
||||
f.clearflags();
|
||||
f.padBytes(f.integer(int64(v), 10, false, ldigits));
|
||||
f.ClearFlags();
|
||||
return f;
|
||||
}
|
||||
|
||||
// Fmt_ud32 formats a uint32 in decimal.
|
||||
func (f *Fmt) Fmt_ud32(v uint32) *Fmt { return f.Fmt_ud64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_ud32(v uint32) { f.Fmt_ud64(uint64(v)) }
|
||||
|
||||
// Fmt_ud formats a uint in decimal.
|
||||
func (f *Fmt) Fmt_ud(v uint) *Fmt { return f.Fmt_ud64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_ud(v uint) { f.Fmt_ud64(uint64(v)) }
|
||||
|
||||
// Fmt_x64 formats an int64 in hexadecimal.
|
||||
func (f *Fmt) Fmt_x64(v int64) *Fmt {
|
||||
f.pad(f.integer(v, 16, true, ldigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_x64(v int64) {
|
||||
f.padBytes(f.integer(v, 16, true, ldigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_x32 formats an int32 in hexadecimal.
|
||||
func (f *Fmt) Fmt_x32(v int32) *Fmt { return f.Fmt_x64(int64(v)) }
|
||||
func (f *Fmt) Fmt_x32(v int32) { f.Fmt_x64(int64(v)) }
|
||||
|
||||
// Fmt_x formats an int in hexadecimal.
|
||||
func (f *Fmt) Fmt_x(v int) *Fmt { return f.Fmt_x64(int64(v)) }
|
||||
func (f *Fmt) Fmt_x(v int) { f.Fmt_x64(int64(v)) }
|
||||
|
||||
// Fmt_ux64 formats a uint64 in hexadecimal.
|
||||
func (f *Fmt) Fmt_ux64(v uint64) *Fmt {
|
||||
f.pad(f.integer(int64(v), 16, false, ldigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_ux64(v uint64) {
|
||||
f.padBytes(f.integer(int64(v), 16, false, ldigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_ux32 formats a uint32 in hexadecimal.
|
||||
func (f *Fmt) Fmt_ux32(v uint32) *Fmt { return f.Fmt_ux64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_ux32(v uint32) { f.Fmt_ux64(uint64(v)) }
|
||||
|
||||
// Fmt_ux formats a uint in hexadecimal.
|
||||
func (f *Fmt) Fmt_ux(v uint) *Fmt { return f.Fmt_ux64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_ux(v uint) { f.Fmt_ux64(uint64(v)) }
|
||||
|
||||
// Fmt_X64 formats an int64 in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_X64(v int64) *Fmt {
|
||||
f.pad(f.integer(v, 16, true, udigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_X64(v int64) {
|
||||
f.padBytes(f.integer(v, 16, true, udigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_X32 formats an int32 in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_X32(v int32) *Fmt { return f.Fmt_X64(int64(v)) }
|
||||
func (f *Fmt) Fmt_X32(v int32) { f.Fmt_X64(int64(v)) }
|
||||
|
||||
// Fmt_X formats an int in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_X(v int) *Fmt { return f.Fmt_X64(int64(v)) }
|
||||
func (f *Fmt) Fmt_X(v int) { f.Fmt_X64(int64(v)) }
|
||||
|
||||
// Fmt_uX64 formats a uint64 in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_uX64(v uint64) *Fmt {
|
||||
f.pad(f.integer(int64(v), 16, false, udigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_uX64(v uint64) {
|
||||
f.padBytes(f.integer(int64(v), 16, false, udigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_uX32 formats a uint32 in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_uX32(v uint32) *Fmt { return f.Fmt_uX64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_uX32(v uint32) { f.Fmt_uX64(uint64(v)) }
|
||||
|
||||
// Fmt_uX formats a uint in upper case hexadecimal.
|
||||
func (f *Fmt) Fmt_uX(v uint) *Fmt { return f.Fmt_uX64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_uX(v uint) { f.Fmt_uX64(uint64(v)) }
|
||||
|
||||
// Fmt_o64 formats an int64 in octal.
|
||||
func (f *Fmt) Fmt_o64(v int64) *Fmt {
|
||||
f.pad(f.integer(v, 8, true, ldigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_o64(v int64) {
|
||||
f.padBytes(f.integer(v, 8, true, ldigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_o32 formats an int32 in octal.
|
||||
func (f *Fmt) Fmt_o32(v int32) *Fmt { return f.Fmt_o64(int64(v)) }
|
||||
func (f *Fmt) Fmt_o32(v int32) { f.Fmt_o64(int64(v)) }
|
||||
|
||||
// Fmt_o formats an int in octal.
|
||||
func (f *Fmt) Fmt_o(v int) *Fmt { return f.Fmt_o64(int64(v)) }
|
||||
func (f *Fmt) Fmt_o(v int) { f.Fmt_o64(int64(v)) }
|
||||
|
||||
// Fmt_uo64 formats a uint64 in octal.
|
||||
func (f *Fmt) Fmt_uo64(v uint64) *Fmt {
|
||||
f.pad(f.integer(int64(v), 8, false, ldigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_uo64(v uint64) {
|
||||
f.padBytes(f.integer(int64(v), 8, false, ldigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_uo32 formats a uint32 in octal.
|
||||
func (f *Fmt) Fmt_uo32(v uint32) *Fmt { return f.Fmt_uo64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_uo32(v uint32) { f.Fmt_uo64(uint64(v)) }
|
||||
|
||||
// Fmt_uo formats a uint in octal.
|
||||
func (f *Fmt) Fmt_uo(v uint) *Fmt { return f.Fmt_uo64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_uo(v uint) { f.Fmt_uo64(uint64(v)) }
|
||||
|
||||
// Fmt_b64 formats a uint64 in binary.
|
||||
func (f *Fmt) Fmt_b64(v uint64) *Fmt {
|
||||
f.pad(f.integer(int64(v), 2, false, ldigits));
|
||||
f.clearflags();
|
||||
return f;
|
||||
func (f *Fmt) Fmt_b64(v uint64) {
|
||||
f.padBytes(f.integer(int64(v), 2, false, ldigits));
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_b32 formats a uint32 in binary.
|
||||
func (f *Fmt) Fmt_b32(v uint32) *Fmt { return f.Fmt_b64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_b32(v uint32) { f.Fmt_b64(uint64(v)) }
|
||||
|
||||
// Fmt_b formats a uint in binary.
|
||||
func (f *Fmt) Fmt_b(v uint) *Fmt { return f.Fmt_b64(uint64(v)) }
|
||||
func (f *Fmt) Fmt_b(v uint) { f.Fmt_b64(uint64(v)) }
|
||||
|
||||
// Fmt_c formats a Unicode character.
|
||||
func (f *Fmt) Fmt_c(v int) *Fmt {
|
||||
func (f *Fmt) Fmt_c(v int) {
|
||||
f.pad(string(v));
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_s formats a string.
|
||||
func (f *Fmt) Fmt_s(s string) *Fmt {
|
||||
if f.prec_present {
|
||||
func (f *Fmt) Fmt_s(s string) {
|
||||
if f.precPresent {
|
||||
if f.prec < len(s) {
|
||||
s = s[0:f.prec]
|
||||
}
|
||||
}
|
||||
f.pad(s);
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_sx formats a string as a hexadecimal encoding of its bytes.
|
||||
func (f *Fmt) Fmt_sx(s string) *Fmt {
|
||||
func (f *Fmt) Fmt_sx(s string) {
|
||||
t := "";
|
||||
for i := 0; i < len(s); i++ {
|
||||
if i > 0 && f.space {
|
||||
@ -384,12 +374,11 @@ func (f *Fmt) Fmt_sx(s string) *Fmt {
|
||||
t += string(ldigits[v&0xF]);
|
||||
}
|
||||
f.pad(t);
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_sX formats a string as an uppercase hexadecimal encoding of its bytes.
|
||||
func (f *Fmt) Fmt_sX(s string) *Fmt {
|
||||
func (f *Fmt) Fmt_sX(s string) {
|
||||
t := "";
|
||||
for i := 0; i < len(s); i++ {
|
||||
v := s[i];
|
||||
@ -397,12 +386,11 @@ func (f *Fmt) Fmt_sX(s string) *Fmt {
|
||||
t += string(udigits[v&0xF]);
|
||||
}
|
||||
f.pad(t);
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Fmt_q formats a string as a double-quoted, escaped Go string constant.
|
||||
func (f *Fmt) Fmt_q(s string) *Fmt {
|
||||
func (f *Fmt) Fmt_q(s string) {
|
||||
var quoted string;
|
||||
if f.sharp && strconv.CanBackquote(s) {
|
||||
quoted = "`" + s + "`"
|
||||
@ -410,27 +398,25 @@ func (f *Fmt) Fmt_q(s string) *Fmt {
|
||||
quoted = strconv.Quote(s)
|
||||
}
|
||||
f.pad(quoted);
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// floating-point
|
||||
|
||||
func doPrec(f *Fmt, def int) int {
|
||||
if f.prec_present {
|
||||
if f.precPresent {
|
||||
return f.prec
|
||||
}
|
||||
return def;
|
||||
}
|
||||
|
||||
func fmtString(f *Fmt, s string) *Fmt {
|
||||
func fmtString(f *Fmt, s string) {
|
||||
f.pad(s);
|
||||
f.clearflags();
|
||||
return f;
|
||||
f.ClearFlags();
|
||||
}
|
||||
|
||||
// Add a plus sign or space to the string if missing and required.
|
||||
func (f *Fmt) plusSpace(s string) *Fmt {
|
||||
func (f *Fmt) plusSpace(s string) {
|
||||
if s[0] != '-' {
|
||||
if f.plus {
|
||||
s = "+" + s
|
||||
@ -438,94 +424,78 @@ func (f *Fmt) plusSpace(s string) *Fmt {
|
||||
s = " " + s
|
||||
}
|
||||
}
|
||||
return fmtString(f, s);
|
||||
fmtString(f, s);
|
||||
}
|
||||
|
||||
// Fmt_e64 formats a float64 in the form -1.23e+12.
|
||||
func (f *Fmt) Fmt_e64(v float64) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa64(v, 'e', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_e64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'e', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_E64 formats a float64 in the form -1.23E+12.
|
||||
func (f *Fmt) Fmt_E64(v float64) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa64(v, 'E', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_E64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'E', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_f64 formats a float64 in the form -1.23.
|
||||
func (f *Fmt) Fmt_f64(v float64) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa64(v, 'f', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_f64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'f', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_g64 formats a float64 in the 'f' or 'e' form according to size.
|
||||
func (f *Fmt) Fmt_g64(v float64) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa64(v, 'g', doPrec(f, -1)))
|
||||
}
|
||||
func (f *Fmt) Fmt_g64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'g', doPrec(f, -1))) }
|
||||
|
||||
// Fmt_g64 formats a float64 in the 'f' or 'E' form according to size.
|
||||
func (f *Fmt) Fmt_G64(v float64) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa64(v, 'G', doPrec(f, -1)))
|
||||
}
|
||||
func (f *Fmt) Fmt_G64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'G', doPrec(f, -1))) }
|
||||
|
||||
// Fmt_fb64 formats a float64 in the form -123p3 (exponent is power of 2).
|
||||
func (f *Fmt) Fmt_fb64(v float64) *Fmt { return f.plusSpace(strconv.Ftoa64(v, 'b', 0)) }
|
||||
func (f *Fmt) Fmt_fb64(v float64) { f.plusSpace(strconv.Ftoa64(v, 'b', 0)) }
|
||||
|
||||
// float32
|
||||
// cannot defer to float64 versions
|
||||
// because it will get rounding wrong in corner cases.
|
||||
|
||||
// Fmt_e32 formats a float32 in the form -1.23e+12.
|
||||
func (f *Fmt) Fmt_e32(v float32) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa32(v, 'e', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_e32(v float32) { f.plusSpace(strconv.Ftoa32(v, 'e', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_E32 formats a float32 in the form -1.23E+12.
|
||||
func (f *Fmt) Fmt_E32(v float32) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa32(v, 'E', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_E32(v float32) { f.plusSpace(strconv.Ftoa32(v, 'E', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_f32 formats a float32 in the form -1.23.
|
||||
func (f *Fmt) Fmt_f32(v float32) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa32(v, 'f', doPrec(f, 6)))
|
||||
}
|
||||
func (f *Fmt) Fmt_f32(v float32) { f.plusSpace(strconv.Ftoa32(v, 'f', doPrec(f, 6))) }
|
||||
|
||||
// Fmt_g32 formats a float32 in the 'f' or 'e' form according to size.
|
||||
func (f *Fmt) Fmt_g32(v float32) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa32(v, 'g', doPrec(f, -1)))
|
||||
}
|
||||
func (f *Fmt) Fmt_g32(v float32) { f.plusSpace(strconv.Ftoa32(v, 'g', doPrec(f, -1))) }
|
||||
|
||||
// Fmt_G32 formats a float32 in the 'f' or 'E' form according to size.
|
||||
func (f *Fmt) Fmt_G32(v float32) *Fmt {
|
||||
return f.plusSpace(strconv.Ftoa32(v, 'G', doPrec(f, -1)))
|
||||
}
|
||||
func (f *Fmt) Fmt_G32(v float32) { f.plusSpace(strconv.Ftoa32(v, 'G', doPrec(f, -1))) }
|
||||
|
||||
// Fmt_fb32 formats a float32 in the form -123p3 (exponent is power of 2).
|
||||
func (f *Fmt) Fmt_fb32(v float32) *Fmt { return fmtString(f, strconv.Ftoa32(v, 'b', 0)) }
|
||||
func (f *Fmt) Fmt_fb32(v float32) { fmtString(f, strconv.Ftoa32(v, 'b', 0)) }
|
||||
|
||||
// float
|
||||
func (x *Fmt) f(a float) *Fmt {
|
||||
func (x *Fmt) f(a float) {
|
||||
if strconv.FloatSize == 32 {
|
||||
return x.Fmt_f32(float32(a))
|
||||
x.Fmt_f32(float32(a))
|
||||
} else {
|
||||
x.Fmt_f64(float64(a))
|
||||
}
|
||||
return x.Fmt_f64(float64(a));
|
||||
}
|
||||
|
||||
func (x *Fmt) e(a float) *Fmt {
|
||||
func (x *Fmt) e(a float) {
|
||||
if strconv.FloatSize == 32 {
|
||||
return x.Fmt_e32(float32(a))
|
||||
x.Fmt_e32(float32(a))
|
||||
} else {
|
||||
x.Fmt_e64(float64(a))
|
||||
}
|
||||
return x.Fmt_e64(float64(a));
|
||||
}
|
||||
|
||||
func (x *Fmt) g(a float) *Fmt {
|
||||
func (x *Fmt) g(a float) {
|
||||
if strconv.FloatSize == 32 {
|
||||
return x.Fmt_g32(float32(a))
|
||||
x.Fmt_g32(float32(a))
|
||||
} else {
|
||||
x.Fmt_g64(float64(a))
|
||||
}
|
||||
return x.Fmt_g64(float64(a));
|
||||
}
|
||||
|
||||
func (x *Fmt) fb(a float) *Fmt {
|
||||
func (x *Fmt) fb(a float) {
|
||||
if strconv.FloatSize == 32 {
|
||||
return x.Fmt_fb32(float32(a))
|
||||
x.Fmt_fb32(float32(a))
|
||||
} else {
|
||||
x.Fmt_fb64(float64(a))
|
||||
}
|
||||
return x.Fmt_fb64(float64(a));
|
||||
}
|
||||
|
||||
@ -77,12 +77,27 @@ package fmt
|
||||
|
||||
|
||||
import (
|
||||
"bytes";
|
||||
"io";
|
||||
"os";
|
||||
"reflect";
|
||||
"utf8";
|
||||
)
|
||||
|
||||
// Some constants in the form of bytes, to avoid string overhead.
|
||||
// Needlessly fastidious, I suppose.
|
||||
var (
|
||||
trueBytes = []byte{'t', 'r', 'u', 'e'};
|
||||
falseBytes = []byte{'f', 'a', 'l', 's', 'e'};
|
||||
commaSpaceBytes = []byte{',', ' '};
|
||||
nilAngleBytes = []byte{'<', 'n', 'i', 'l', '>'};
|
||||
nilParenBytes = []byte{'(', 'n', 'i', 'l', ')'};
|
||||
nilBytes = []byte{'n', 'i', 'l'};
|
||||
mapBytes = []byte{'m', 'a', 'p', '['};
|
||||
missingBytes = []byte{'m', 'i', 's', 's', 'i', 'n', 'g'};
|
||||
extraBytes = []byte{'?', '(', 'e', 'x', 't', 'r', 'a', ' '};
|
||||
)
|
||||
|
||||
// State represents the printer state passed to custom formatters.
|
||||
// It provides access to the io.Writer interface plus information about
|
||||
// the flags and options for the operand's format specifier.
|
||||
@ -126,19 +141,29 @@ const allocSize = 32
|
||||
|
||||
type pp struct {
|
||||
n int;
|
||||
buf []byte;
|
||||
fmt *Fmt;
|
||||
buf bytes.Buffer;
|
||||
runeBuf [utf8.UTFMax]byte;
|
||||
fmt Fmt;
|
||||
}
|
||||
|
||||
// A leaky bucket of reusable pp structures.
|
||||
var ppFree = make(chan *pp, 100)
|
||||
|
||||
func newPrinter() *pp {
|
||||
p := new(pp);
|
||||
p.fmt = New();
|
||||
p, ok := <-ppFree;
|
||||
if !ok {
|
||||
p = new(pp)
|
||||
}
|
||||
p.buf.Reset();
|
||||
p.fmt.Init(&p.buf);
|
||||
return p;
|
||||
}
|
||||
|
||||
func (p *pp) Width() (wid int, ok bool) { return p.fmt.wid, p.fmt.wid_present }
|
||||
func (p *pp) free() { _ = ppFree <- p }
|
||||
|
||||
func (p *pp) Precision() (prec int, ok bool) { return p.fmt.prec, p.fmt.prec_present }
|
||||
func (p *pp) Width() (wid int, ok bool) { return p.fmt.wid, p.fmt.widPresent }
|
||||
|
||||
func (p *pp) Precision() (prec int, ok bool) { return p.fmt.prec, p.fmt.precPresent }
|
||||
|
||||
func (p *pp) Flag(b int) bool {
|
||||
switch b {
|
||||
@ -156,52 +181,19 @@ func (p *pp) Flag(b int) bool {
|
||||
return false;
|
||||
}
|
||||
|
||||
func (p *pp) ensure(n int) {
|
||||
if len(p.buf) < n {
|
||||
newn := allocSize + len(p.buf);
|
||||
if newn < n {
|
||||
newn = n + allocSize
|
||||
}
|
||||
b := make([]byte, newn);
|
||||
for i := 0; i < p.n; i++ {
|
||||
b[i] = p.buf[i]
|
||||
}
|
||||
p.buf = b;
|
||||
}
|
||||
}
|
||||
|
||||
func (p *pp) addstr(s string) {
|
||||
n := len(s);
|
||||
p.ensure(p.n + n);
|
||||
for i := 0; i < n; i++ {
|
||||
p.buf[p.n] = s[i];
|
||||
p.n++;
|
||||
}
|
||||
}
|
||||
|
||||
func (p *pp) addbytes(b []byte, start, end int) {
|
||||
p.ensure(p.n + end - start);
|
||||
for i := start; i < end; i++ {
|
||||
p.buf[p.n] = b[i];
|
||||
p.n++;
|
||||
}
|
||||
}
|
||||
|
||||
func (p *pp) add(c int) {
|
||||
p.ensure(p.n + 1);
|
||||
if c < runeSelf {
|
||||
p.buf[p.n] = byte(c);
|
||||
p.n++;
|
||||
p.buf.WriteByte(byte(c))
|
||||
} else {
|
||||
p.addstr(string(c))
|
||||
w := utf8.EncodeRune(c, &p.runeBuf);
|
||||
p.buf.Write(p.runeBuf[0:w]);
|
||||
}
|
||||
}
|
||||
|
||||
// Implement Write so we can call fprintf on a P, for
|
||||
// Implement Write so we can call Fprintf on a pp (through State), for
|
||||
// recursive use in custom verbs.
|
||||
func (p *pp) Write(b []byte) (ret int, err os.Error) {
|
||||
p.addbytes(b, 0, len(b));
|
||||
return len(b), nil;
|
||||
return p.buf.Write(b)
|
||||
}
|
||||
|
||||
// These routines end in 'f' and take a format string.
|
||||
@ -211,8 +203,9 @@ func Fprintf(w io.Writer, format string, a ...) (n int, error os.Error) {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprintf(format, v);
|
||||
n, error = w.Write(p.buf[0:p.n]);
|
||||
return n, error;
|
||||
n64, error := p.buf.WriteTo(w);
|
||||
p.free();
|
||||
return int(n64), error;
|
||||
}
|
||||
|
||||
// Printf formats according to a format specifier and writes to standard output.
|
||||
@ -226,7 +219,8 @@ func Sprintf(format string, a ...) string {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprintf(format, v);
|
||||
s := string(p.buf)[0:p.n];
|
||||
s := p.buf.String();
|
||||
p.free();
|
||||
return s;
|
||||
}
|
||||
|
||||
@ -238,8 +232,9 @@ func Fprint(w io.Writer, a ...) (n int, error os.Error) {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprint(v, false, false);
|
||||
n, error = w.Write(p.buf[0:p.n]);
|
||||
return n, error;
|
||||
n64, error := p.buf.WriteTo(w);
|
||||
p.free();
|
||||
return int(n64), error;
|
||||
}
|
||||
|
||||
// Print formats using the default formats for its operands and writes to standard output.
|
||||
@ -255,8 +250,8 @@ func Sprint(a ...) string {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprint(v, false, false);
|
||||
s := string(p.buf)[0:p.n];
|
||||
return s;
|
||||
p.free();
|
||||
return p.buf.String();
|
||||
}
|
||||
|
||||
// These routines end in 'ln', do not take a format string,
|
||||
@ -269,8 +264,9 @@ func Fprintln(w io.Writer, a ...) (n int, error os.Error) {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprint(v, true, true);
|
||||
n, error = w.Write(p.buf[0:p.n]);
|
||||
return n, error;
|
||||
n64, error := p.buf.WriteTo(w);
|
||||
p.free();
|
||||
return int(n64), error;
|
||||
}
|
||||
|
||||
// Println formats using the default formats for its operands and writes to standard output.
|
||||
@ -286,7 +282,8 @@ func Sprintln(a ...) string {
|
||||
v := reflect.NewValue(a).(*reflect.StructValue);
|
||||
p := newPrinter();
|
||||
p.doprint(v, true, true);
|
||||
s := string(p.buf)[0:p.n];
|
||||
s := p.buf.String();
|
||||
p.free();
|
||||
return s;
|
||||
}
|
||||
|
||||
@ -409,121 +406,120 @@ func (p *pp) printField(field reflect.Value, plus, sharp bool, depth int) (was_s
|
||||
switch {
|
||||
default:
|
||||
if stringer, ok := inter.(Stringer); ok {
|
||||
p.addstr(stringer.String());
|
||||
p.buf.WriteString(stringer.String());
|
||||
return false; // this value is not a string
|
||||
}
|
||||
case sharp:
|
||||
if stringer, ok := inter.(GoStringer); ok {
|
||||
p.addstr(stringer.GoString());
|
||||
p.buf.WriteString(stringer.GoString());
|
||||
return false; // this value is not a string
|
||||
}
|
||||
}
|
||||
}
|
||||
s := "";
|
||||
BigSwitch:
|
||||
switch f := field.(type) {
|
||||
case *reflect.BoolValue:
|
||||
s = p.fmt.Fmt_boolean(f.Get()).Str()
|
||||
p.fmt.Fmt_boolean(f.Get())
|
||||
case *reflect.Float32Value:
|
||||
s = p.fmt.Fmt_g32(f.Get()).Str()
|
||||
p.fmt.Fmt_g32(f.Get())
|
||||
case *reflect.Float64Value:
|
||||
s = p.fmt.Fmt_g64(f.Get()).Str()
|
||||
p.fmt.Fmt_g64(f.Get())
|
||||
case *reflect.FloatValue:
|
||||
if field.Type().Size()*8 == 32 {
|
||||
s = p.fmt.Fmt_g32(float32(f.Get())).Str()
|
||||
p.fmt.Fmt_g32(float32(f.Get()))
|
||||
} else {
|
||||
s = p.fmt.Fmt_g64(float64(f.Get())).Str()
|
||||
p.fmt.Fmt_g64(float64(f.Get()))
|
||||
}
|
||||
case *reflect.StringValue:
|
||||
if sharp {
|
||||
s = p.fmt.Fmt_q(f.Get()).Str()
|
||||
p.fmt.Fmt_q(f.Get())
|
||||
} else {
|
||||
s = p.fmt.Fmt_s(f.Get()).Str();
|
||||
p.fmt.Fmt_s(f.Get());
|
||||
was_string = true;
|
||||
}
|
||||
case *reflect.MapValue:
|
||||
if sharp {
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr("{");
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte('{');
|
||||
} else {
|
||||
p.addstr("map[")
|
||||
p.buf.Write(mapBytes)
|
||||
}
|
||||
keys := f.Keys();
|
||||
for i, key := range keys {
|
||||
if i > 0 {
|
||||
if sharp {
|
||||
p.addstr(", ")
|
||||
p.buf.Write(commaSpaceBytes)
|
||||
} else {
|
||||
p.addstr(" ")
|
||||
p.buf.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
p.printField(key, plus, sharp, depth+1);
|
||||
p.addstr(":");
|
||||
p.buf.WriteByte(':');
|
||||
p.printField(f.Elem(key), plus, sharp, depth+1);
|
||||
}
|
||||
if sharp {
|
||||
p.addstr("}")
|
||||
p.buf.WriteByte('}')
|
||||
} else {
|
||||
p.addstr("]")
|
||||
p.buf.WriteByte(']')
|
||||
}
|
||||
case *reflect.StructValue:
|
||||
if sharp {
|
||||
p.addstr(field.Type().String())
|
||||
p.buf.WriteString(field.Type().String())
|
||||
}
|
||||
p.add('{');
|
||||
v := f;
|
||||
t := v.Type().(*reflect.StructType);
|
||||
p.fmt.clearflags(); // clear flags for p.printField
|
||||
p.fmt.ClearFlags(); // clear flags for p.printField
|
||||
for i := 0; i < v.NumField(); i++ {
|
||||
if i > 0 {
|
||||
if sharp {
|
||||
p.addstr(", ")
|
||||
p.buf.Write(commaSpaceBytes)
|
||||
} else {
|
||||
p.addstr(" ")
|
||||
p.buf.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
if plus || sharp {
|
||||
if f := t.Field(i); f.Name != "" {
|
||||
p.addstr(f.Name);
|
||||
p.add(':');
|
||||
p.buf.WriteString(f.Name);
|
||||
p.buf.WriteByte(':');
|
||||
}
|
||||
}
|
||||
p.printField(getField(v, i), plus, sharp, depth+1);
|
||||
}
|
||||
p.addstr("}");
|
||||
p.buf.WriteByte('}');
|
||||
case *reflect.InterfaceValue:
|
||||
value := f.Elem();
|
||||
if value == nil {
|
||||
if sharp {
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr("(nil)");
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.Write(nilParenBytes);
|
||||
} else {
|
||||
s = "<nil>"
|
||||
p.buf.Write(nilAngleBytes)
|
||||
}
|
||||
} else {
|
||||
return p.printField(value, plus, sharp, depth+1)
|
||||
}
|
||||
case reflect.ArrayOrSliceValue:
|
||||
if sharp {
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr("{");
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte('{');
|
||||
} else {
|
||||
p.addstr("[")
|
||||
p.buf.WriteByte('[')
|
||||
}
|
||||
for i := 0; i < f.Len(); i++ {
|
||||
if i > 0 {
|
||||
if sharp {
|
||||
p.addstr(", ")
|
||||
p.buf.Write(commaSpaceBytes)
|
||||
} else {
|
||||
p.addstr(" ")
|
||||
p.buf.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
p.printField(f.Elem(i), plus, sharp, depth+1);
|
||||
}
|
||||
if sharp {
|
||||
p.addstr("}")
|
||||
p.buf.WriteByte('}')
|
||||
} else {
|
||||
p.addstr("]")
|
||||
p.buf.WriteByte(']')
|
||||
}
|
||||
case *reflect.PtrValue:
|
||||
v := f.Get();
|
||||
@ -532,86 +528,92 @@ BigSwitch:
|
||||
if v != 0 && depth == 0 {
|
||||
switch a := f.Elem().(type) {
|
||||
case reflect.ArrayOrSliceValue:
|
||||
p.addstr("&");
|
||||
p.buf.WriteByte('&');
|
||||
p.printField(a, plus, sharp, depth+1);
|
||||
break BigSwitch;
|
||||
case *reflect.StructValue:
|
||||
p.addstr("&");
|
||||
p.buf.WriteByte('&');
|
||||
p.printField(a, plus, sharp, depth+1);
|
||||
break BigSwitch;
|
||||
}
|
||||
}
|
||||
if sharp {
|
||||
p.addstr("(");
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr(")(");
|
||||
p.buf.WriteByte('(');
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte(')');
|
||||
p.buf.WriteByte('(');
|
||||
if v == 0 {
|
||||
p.addstr("nil")
|
||||
p.buf.Write(nilBytes)
|
||||
} else {
|
||||
p.fmt.sharp = true;
|
||||
p.addstr(p.fmt.Fmt_ux64(uint64(v)).Str());
|
||||
p.fmt.Fmt_ux64(uint64(v));
|
||||
}
|
||||
p.addstr(")");
|
||||
p.buf.WriteByte(')');
|
||||
break;
|
||||
}
|
||||
if v == 0 {
|
||||
s = "<nil>";
|
||||
p.buf.Write(nilAngleBytes);
|
||||
break;
|
||||
}
|
||||
p.fmt.sharp = true; // turn 0x on
|
||||
s = p.fmt.Fmt_ux64(uint64(v)).Str();
|
||||
p.fmt.Fmt_ux64(uint64(v));
|
||||
case uintptrGetter:
|
||||
v := f.Get();
|
||||
if sharp {
|
||||
p.addstr("(");
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr(")(");
|
||||
p.buf.WriteByte('(');
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte(')');
|
||||
p.buf.WriteByte('(');
|
||||
if v == 0 {
|
||||
p.addstr("nil")
|
||||
p.buf.Write(nilBytes)
|
||||
} else {
|
||||
p.fmt.sharp = true;
|
||||
p.addstr(p.fmt.Fmt_ux64(uint64(v)).Str());
|
||||
p.fmt.Fmt_ux64(uint64(v));
|
||||
}
|
||||
p.addstr(")");
|
||||
p.buf.WriteByte(')');
|
||||
} else {
|
||||
p.fmt.sharp = true; // turn 0x on
|
||||
p.addstr(p.fmt.Fmt_ux64(uint64(f.Get())).Str());
|
||||
p.fmt.Fmt_ux64(uint64(f.Get()));
|
||||
}
|
||||
default:
|
||||
v, signed, ok := getInt(field);
|
||||
if ok {
|
||||
if signed {
|
||||
s = p.fmt.Fmt_d64(v).Str()
|
||||
p.fmt.Fmt_d64(v)
|
||||
} else {
|
||||
if sharp {
|
||||
p.fmt.sharp = true; // turn on 0x
|
||||
s = p.fmt.Fmt_ux64(uint64(v)).Str();
|
||||
p.fmt.Fmt_ux64(uint64(v));
|
||||
} else {
|
||||
s = p.fmt.Fmt_ud64(uint64(v)).Str()
|
||||
p.fmt.Fmt_ud64(uint64(v))
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
s = "?" + field.Type().String() + "?";
|
||||
p.buf.WriteByte('?');
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte('?');
|
||||
}
|
||||
p.addstr(s);
|
||||
return was_string;
|
||||
}
|
||||
|
||||
func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
p.ensure(len(format)); // a good starting size
|
||||
end := len(format) - 1;
|
||||
fieldnum := 0; // we process one field per non-trivial format
|
||||
for i := 0; i <= end; {
|
||||
c, w := utf8.DecodeRuneInString(format[i:]);
|
||||
if c != '%' || i == end {
|
||||
p.add(c);
|
||||
if w == 1 {
|
||||
p.buf.WriteByte(byte(c))
|
||||
} else {
|
||||
p.buf.WriteString(format[i : i+w])
|
||||
}
|
||||
i += w;
|
||||
continue;
|
||||
}
|
||||
i++;
|
||||
// flags and widths
|
||||
p.fmt.clearflags();
|
||||
p.fmt.ClearFlags();
|
||||
F: for ; i < end; i++ {
|
||||
switch format[i] {
|
||||
case '#':
|
||||
@ -629,22 +631,22 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
}
|
||||
}
|
||||
// do we have 20 (width)?
|
||||
p.fmt.wid, p.fmt.wid_present, i = parsenum(format, i, end);
|
||||
p.fmt.wid, p.fmt.widPresent, i = parsenum(format, i, end);
|
||||
// do we have .20 (precision)?
|
||||
if i < end && format[i] == '.' {
|
||||
p.fmt.prec, p.fmt.prec_present, i = parsenum(format, i+1, end)
|
||||
p.fmt.prec, p.fmt.precPresent, i = parsenum(format, i+1, end)
|
||||
}
|
||||
c, w = utf8.DecodeRuneInString(format[i:]);
|
||||
i += w;
|
||||
// percent is special - absorbs no operand
|
||||
if c == '%' {
|
||||
p.add('%'); // TODO: should we bother with width & prec?
|
||||
p.buf.WriteByte('%'); // TODO: should we bother with width & prec?
|
||||
continue;
|
||||
}
|
||||
if fieldnum >= v.NumField() { // out of operands
|
||||
p.add('%');
|
||||
p.buf.WriteByte('%');
|
||||
p.add(c);
|
||||
p.addstr("(missing)");
|
||||
p.buf.Write(missingBytes);
|
||||
continue;
|
||||
}
|
||||
field := getField(v, fieldnum);
|
||||
@ -660,15 +662,14 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
}
|
||||
}
|
||||
|
||||
s := "";
|
||||
switch c {
|
||||
// bool
|
||||
case 't':
|
||||
if v, ok := getBool(field); ok {
|
||||
if v {
|
||||
s = "true"
|
||||
p.buf.Write(trueBytes)
|
||||
} else {
|
||||
s = "false"
|
||||
p.buf.Write(falseBytes)
|
||||
}
|
||||
} else {
|
||||
goto badtype
|
||||
@ -677,26 +678,26 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
// int
|
||||
case 'b':
|
||||
if v, _, ok := getInt(field); ok {
|
||||
s = p.fmt.Fmt_b64(uint64(v)).Str() // always unsigned
|
||||
p.fmt.Fmt_b64(uint64(v)) // always unsigned
|
||||
} else if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_fb32(v).Str()
|
||||
p.fmt.Fmt_fb32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_fb64(v).Str()
|
||||
p.fmt.Fmt_fb64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'c':
|
||||
if v, _, ok := getInt(field); ok {
|
||||
s = p.fmt.Fmt_c(int(v)).Str()
|
||||
p.fmt.Fmt_c(int(v))
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'd':
|
||||
if v, signed, ok := getInt(field); ok {
|
||||
if signed {
|
||||
s = p.fmt.Fmt_d64(v).Str()
|
||||
p.fmt.Fmt_d64(v)
|
||||
} else {
|
||||
s = p.fmt.Fmt_ud64(uint64(v)).Str()
|
||||
p.fmt.Fmt_ud64(uint64(v))
|
||||
}
|
||||
} else {
|
||||
goto badtype
|
||||
@ -704,9 +705,9 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
case 'o':
|
||||
if v, signed, ok := getInt(field); ok {
|
||||
if signed {
|
||||
s = p.fmt.Fmt_o64(v).Str()
|
||||
p.fmt.Fmt_o64(v)
|
||||
} else {
|
||||
s = p.fmt.Fmt_uo64(uint64(v)).Str()
|
||||
p.fmt.Fmt_uo64(uint64(v))
|
||||
}
|
||||
} else {
|
||||
goto badtype
|
||||
@ -714,24 +715,24 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
case 'x':
|
||||
if v, signed, ok := getInt(field); ok {
|
||||
if signed {
|
||||
s = p.fmt.Fmt_x64(v).Str()
|
||||
p.fmt.Fmt_x64(v)
|
||||
} else {
|
||||
s = p.fmt.Fmt_ux64(uint64(v)).Str()
|
||||
p.fmt.Fmt_ux64(uint64(v))
|
||||
}
|
||||
} else if v, ok := getString(field); ok {
|
||||
s = p.fmt.Fmt_sx(v).Str()
|
||||
p.fmt.Fmt_sx(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'X':
|
||||
if v, signed, ok := getInt(field); ok {
|
||||
if signed {
|
||||
s = p.fmt.Fmt_X64(v).Str()
|
||||
p.fmt.Fmt_X64(v)
|
||||
} else {
|
||||
s = p.fmt.Fmt_uX64(uint64(v)).Str()
|
||||
p.fmt.Fmt_uX64(uint64(v))
|
||||
}
|
||||
} else if v, ok := getString(field); ok {
|
||||
s = p.fmt.Fmt_sX(v).Str()
|
||||
p.fmt.Fmt_sX(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
@ -739,41 +740,41 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
// float
|
||||
case 'e':
|
||||
if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_e32(v).Str()
|
||||
p.fmt.Fmt_e32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_e64(v).Str()
|
||||
p.fmt.Fmt_e64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'E':
|
||||
if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_E32(v).Str()
|
||||
p.fmt.Fmt_E32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_E64(v).Str()
|
||||
p.fmt.Fmt_E64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'f':
|
||||
if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_f32(v).Str()
|
||||
p.fmt.Fmt_f32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_f64(v).Str()
|
||||
p.fmt.Fmt_f64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'g':
|
||||
if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_g32(v).Str()
|
||||
p.fmt.Fmt_g32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_g64(v).Str()
|
||||
p.fmt.Fmt_g64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'G':
|
||||
if v, ok := getFloat32(field); ok {
|
||||
s = p.fmt.Fmt_G32(v).Str()
|
||||
p.fmt.Fmt_G32(v)
|
||||
} else if v, ok := getFloat64(field); ok {
|
||||
s = p.fmt.Fmt_G64(v).Str()
|
||||
p.fmt.Fmt_G64(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
@ -783,18 +784,18 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
if inter != nil {
|
||||
// if object implements String, use the result.
|
||||
if stringer, ok := inter.(Stringer); ok {
|
||||
s = p.fmt.Fmt_s(stringer.String()).Str();
|
||||
p.fmt.Fmt_s(stringer.String());
|
||||
break;
|
||||
}
|
||||
}
|
||||
if v, ok := getString(field); ok {
|
||||
s = p.fmt.Fmt_s(v).Str()
|
||||
p.fmt.Fmt_s(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
case 'q':
|
||||
if v, ok := getString(field); ok {
|
||||
s = p.fmt.Fmt_q(v).Str()
|
||||
p.fmt.Fmt_q(v)
|
||||
} else {
|
||||
goto badtype
|
||||
}
|
||||
@ -803,9 +804,10 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
case 'p':
|
||||
if v, ok := getPtr(field); ok {
|
||||
if v == 0 {
|
||||
s = "<nil>"
|
||||
p.buf.Write(nilAngleBytes)
|
||||
} else {
|
||||
s = "0x" + p.fmt.Fmt_uX64(uint64(v)).Str()
|
||||
p.fmt.Fmt_s("0x");
|
||||
p.fmt.Fmt_uX64(uint64(v));
|
||||
}
|
||||
} else {
|
||||
goto badtype
|
||||
@ -820,29 +822,31 @@ func (p *pp) doprintf(format string, v *reflect.StructValue) {
|
||||
|
||||
// the value's type
|
||||
case 'T':
|
||||
s = field.Type().String()
|
||||
p.buf.WriteString(field.Type().String())
|
||||
|
||||
default:
|
||||
badtype:
|
||||
s = "%" + string(c) + "(" + field.Type().String() + "=";
|
||||
p.addstr(s);
|
||||
p.buf.WriteByte('%');
|
||||
p.add(c);
|
||||
p.buf.WriteByte('(');
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte('=');
|
||||
p.printField(field, false, false, 0);
|
||||
s = ")";
|
||||
p.buf.WriteByte(')');
|
||||
}
|
||||
p.addstr(s);
|
||||
}
|
||||
if fieldnum < v.NumField() {
|
||||
p.addstr("?(extra ");
|
||||
p.buf.Write(extraBytes);
|
||||
for ; fieldnum < v.NumField(); fieldnum++ {
|
||||
field := getField(v, fieldnum);
|
||||
p.addstr(field.Type().String());
|
||||
p.addstr("=");
|
||||
p.buf.WriteString(field.Type().String());
|
||||
p.buf.WriteByte('=');
|
||||
p.printField(field, false, false, 0);
|
||||
if fieldnum+1 < v.NumField() {
|
||||
p.addstr(", ")
|
||||
p.buf.Write(commaSpaceBytes)
|
||||
}
|
||||
}
|
||||
p.addstr(")");
|
||||
p.buf.WriteByte(')');
|
||||
}
|
||||
}
|
||||
|
||||
@ -854,12 +858,12 @@ func (p *pp) doprint(v *reflect.StructValue, addspace, addnewline bool) {
|
||||
if fieldnum > 0 {
|
||||
_, is_string := field.(*reflect.StringValue);
|
||||
if addspace || !is_string && !prev_string {
|
||||
p.add(' ')
|
||||
p.buf.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
prev_string = p.printField(field, false, false, 0);
|
||||
}
|
||||
if addnewline {
|
||||
p.add('\n')
|
||||
p.buf.WriteByte('\n')
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user