mirror of
https://github.com/golang/go
synced 2024-10-05 02:31:21 -06:00
094f1d5990
R=gri OCL=35485 CL=35488
870 lines
21 KiB
Go
870 lines
21 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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/*
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Package fmt implements formatted I/O with functions analogous
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to C's printf. The format 'verbs' are derived from C's but
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are simpler.
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The verbs:
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General:
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%v the value in a default format.
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when printing structs, the plus flag (%+v) adds field names
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%#v a Go-syntax representation of the value
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%T a Go-syntax representation of the type of the value
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Boolean:
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%t the word true or false
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Integer:
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%b base 2
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%c the character represented by the corresponding Unicode code point
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%d base 10
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%o base 8
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%x base 16, with lower-case letters for a-f
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%X base 16, with upper-case letters for A-F
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Floating-point:
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%e scientific notation, e.g. -1234.456e+78
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%E scientific notation, e.g. -1234.456E+78
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%f decimal point but no exponent, e.g. 123.456
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%g whichever of %e or %f produces more compact output
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%G whichever of %E or %f produces more compact output
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String and slice of bytes:
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%s the uninterpreted bytes of the string or slice
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%q a double-quoted string safely escaped with Go syntax
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%x base 16 notation with two characters per byte
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Pointer:
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%p base 16 notation, with leading 0x
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There is no 'u' flag. Integers are printed unsigned if they have unsigned type.
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Similarly, there is no need to specify the size of the operand (int8, int64).
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For numeric values, the width and precision flags control
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formatting; width sets the width of the field, precision the
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number of places after the decimal, if appropriate. The
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format %6.2f prints 123.45.
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Other flags:
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+ always print a sign for numeric values
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- pad with spaces on the right rather than the left (left-justify the field)
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# alternate format: add leading 0 for octal (%#o), 0x for hex (%#x);
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suppress 0x for %p (%#p);
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print a raw (backquoted) string if possible for %q (%#q)
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' ' (space) leave a space for elided sign in numbers (% d);
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put spaces between bytes printing strings or slices in hex (% x)
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0 pad with leading zeros rather than spaces
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For each Printf-like function, there is also a Print function
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that takes no format and is equivalent to saying %v for every
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operand. Another variant Println inserts blanks between
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operands and appends a newline.
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Regardless of the verb, if an operand is an interface value,
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the internal concrete value is used, not the interface itself.
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Thus:
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var i interface{} = 23;
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fmt.Printf("%v\n", i);
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will print 23.
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If an operand implements interface Formatter, that interface
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can be used for fine control of formatting.
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If an operand implements method String() string that method
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will be used for %v, %s, or Print etc.
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*/
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package fmt
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import (
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"io";
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"os";
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"reflect";
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"utf8";
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)
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// State represents the printer state passed to custom formatters.
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// It provides access to the io.Writer interface plus information about
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// the flags and options for the operand's format specifier.
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type State interface {
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// Write is the function to call to emit formatted output to be printed.
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Write(b []byte) (ret int, err os.Error);
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// Width returns the value of the width option and whether it has been set.
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Width() (wid int, ok bool);
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// Precision returns the value of the precision option and whether it has been set.
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Precision() (prec int, ok bool);
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// Flag returns whether the flag c, a character, has been set.
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Flag(int) bool;
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}
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// Formatter is the interface implemented by values with a custom formatter.
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// The implementation of Format may call Sprintf or Fprintf(f) etc.
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// to generate its output.
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type Formatter interface {
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Format(f State, c int);
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}
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// Stringer is implemented by any value that has a String method(),
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// which defines the ``native'' format for that value.
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// The String method is used to print values passed as an operand
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// to a %s or %v format or to an unformatted printer such as Print.
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type Stringer interface {
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String() string;
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}
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// GoStringer is implemented by any value that has a GoString() method,
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// which defines the Go syntax for that value.
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// The GoString method is used to print values passed as an operand
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// to a %#v format.
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type GoStringer interface {
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GoString() string;
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}
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const runeSelf = utf8.RuneSelf
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const allocSize = 32
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type pp struct {
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n int;
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buf []byte;
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fmt *Fmt;
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}
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func newPrinter() *pp {
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p := new(pp);
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p.fmt = New();
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return p;
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}
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func (p *pp) Width() (wid int, ok bool) {
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return p.fmt.wid, p.fmt.wid_present;
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}
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func (p *pp) Precision() (prec int, ok bool) {
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return p.fmt.prec, p.fmt.prec_present;
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}
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func (p *pp) Flag(b int) bool {
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switch b {
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case '-':
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return p.fmt.minus;
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case '+':
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return p.fmt.plus;
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case '#':
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return p.fmt.sharp;
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case ' ':
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return p.fmt.space;
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case '0':
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return p.fmt.zero;
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}
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return false;
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}
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func (p *pp) ensure(n int) {
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if len(p.buf) < n {
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newn := allocSize + len(p.buf);
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if newn < n {
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newn = n + allocSize;
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}
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b := make([]byte, newn);
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for i := 0; i < p.n; i++ {
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b[i] = p.buf[i];
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}
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p.buf = b;
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}
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}
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func (p *pp) addstr(s string) {
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n := len(s);
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p.ensure(p.n + n);
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for i := 0; i < n; i++ {
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p.buf[p.n] = s[i];
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p.n++;
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}
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}
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func (p *pp) addbytes(b []byte, start, end int) {
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p.ensure(p.n + end - start);
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for i := start; i < end; i++ {
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p.buf[p.n] = b[i];
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p.n++;
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}
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}
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func (p *pp) add(c int) {
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p.ensure(p.n + 1);
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if c < runeSelf {
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p.buf[p.n] = byte(c);
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p.n++;
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} else {
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p.addstr(string(c));
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}
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}
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// Implement Write so we can call fprintf on a P, for
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// recursive use in custom verbs.
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func (p *pp) Write(b []byte) (ret int, err os.Error) {
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p.addbytes(b, 0, len(b));
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return len(b), nil;
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}
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// These routines end in 'f' and take a format string.
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// Fprintf formats according to a format specifier and writes to w.
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func Fprintf(w io.Writer, format string, a ...) (n int, error os.Error) {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprintf(format, v);
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n, error = w.Write(p.buf[0 : p.n]);
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return n, error;
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}
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// Printf formats according to a format specifier and writes to standard output.
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func Printf(format string, v ...) (n int, errno os.Error) {
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n, errno = Fprintf(os.Stdout, format, v);
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return n, errno;
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}
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// Sprintf formats according to a format specifier and returns the resulting string.
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func Sprintf(format string, a ...) string {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprintf(format, v);
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s := string(p.buf)[0 : p.n];
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return s;
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}
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// These routines do not take a format string
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// Fprint formats using the default formats for its operands and writes to w.
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// Spaces are added between operands when neither is a string.
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func Fprint(w io.Writer, a ...) (n int, error os.Error) {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprint(v, false, false);
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n, error = w.Write(p.buf[0 : p.n]);
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return n, error;
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}
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// Print formats using the default formats for its operands and writes to standard output.
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// Spaces are added between operands when neither is a string.
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func Print(v ...) (n int, errno os.Error) {
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n, errno = Fprint(os.Stdout, v);
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return n, errno;
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}
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// Sprint formats using the default formats for its operands and returns the resulting string.
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// Spaces are added between operands when neither is a string.
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func Sprint(a ...) string {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprint(v, false, false);
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s := string(p.buf)[0 : p.n];
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return s;
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}
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// These routines end in 'ln', do not take a format string,
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// always add spaces between operands, and add a newline
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// after the last operand.
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// Fprintln formats using the default formats for its operands and writes to w.
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// Spaces are always added between operands and a newline is appended.
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func Fprintln(w io.Writer, a ...) (n int, error os.Error) {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprint(v, true, true);
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n, error = w.Write(p.buf[0 : p.n]);
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return n, error;
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}
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// Println formats using the default formats for its operands and writes to standard output.
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// Spaces are always added between operands and a newline is appended.
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func Println(v ...) (n int, errno os.Error) {
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n, errno = Fprintln(os.Stdout, v);
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return n, errno;
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}
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// Sprintln formats using the default formats for its operands and returns the resulting string.
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// Spaces are always added between operands and a newline is appended.
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func Sprintln(a ...) string {
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v := reflect.NewValue(a).(*reflect.StructValue);
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p := newPrinter();
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p.doprint(v, true, true);
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s := string(p.buf)[0 : p.n];
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return s;
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}
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// Get the i'th arg of the struct value.
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// If the arg itself is an interface, return a value for
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// the thing inside the interface, not the interface itself.
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func getField(v *reflect.StructValue, i int) reflect.Value {
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val := v.Field(i);
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if i, ok := val.(*reflect.InterfaceValue); ok {
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if inter := i.Interface(); inter != nil {
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return reflect.NewValue(inter);
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}
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}
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return val;
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}
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// Getters for the fields of the argument structure.
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func getBool(v reflect.Value) (val bool, ok bool) {
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if b, ok := v.(*reflect.BoolValue); ok {
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return b.Get(), true;
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}
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return;
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}
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func getInt(v reflect.Value) (val int64, signed, ok bool) {
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switch v := v.(type) {
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case *reflect.IntValue:
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return int64(v.Get()), true, true;
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case *reflect.Int8Value:
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return int64(v.Get()), true, true;
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case *reflect.Int16Value:
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return int64(v.Get()), true, true;
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case *reflect.Int32Value:
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return int64(v.Get()), true, true;
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case *reflect.Int64Value:
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return int64(v.Get()), true, true;
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case *reflect.UintValue:
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return int64(v.Get()), false, true;
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case *reflect.Uint8Value:
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return int64(v.Get()), false, true;
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case *reflect.Uint16Value:
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return int64(v.Get()), false, true;
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case *reflect.Uint32Value:
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return int64(v.Get()), false, true;
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case *reflect.Uint64Value:
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return int64(v.Get()), false, true;
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case *reflect.UintptrValue:
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return int64(v.Get()), false, true;
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}
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return;
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}
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func getString(v reflect.Value) (val string, ok bool) {
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if v, ok := v.(*reflect.StringValue); ok {
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return v.Get(), true;
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}
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if bytes, ok := v.Interface().([]byte); ok {
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return string(bytes), true;
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}
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return;
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}
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func getFloat32(v reflect.Value) (val float32, ok bool) {
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switch v := v.(type) {
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case *reflect.Float32Value:
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return float32(v.Get()), true;
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case *reflect.FloatValue:
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if v.Type().Size() * 8 == 32 {
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return float32(v.Get()), true;
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}
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}
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return;
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}
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func getFloat64(v reflect.Value) (val float64, ok bool) {
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switch v := v.(type) {
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case *reflect.FloatValue:
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if v.Type().Size() * 8 == 64 {
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return float64(v.Get()), true;
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}
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case *reflect.Float64Value:
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return float64(v.Get()), true;
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}
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return;
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}
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func getPtr(v reflect.Value) (val uintptr, ok bool) {
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switch v := v.(type) {
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case *reflect.PtrValue:
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return uintptr(v.Get()), true;
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}
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return;
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}
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// Convert ASCII to integer. n is 0 (and got is false) if no number present.
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func parsenum(s string, start, end int) (n int, got bool, newi int) {
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if start >= end {
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return 0, false, end;
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}
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isnum := false;
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num := 0;
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for '0' <= s[start] && s[start] <= '9' {
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num = num*10 + int(s[start]-'0');
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start++;
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isnum = true;
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}
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return num, isnum, start;
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}
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type uintptrGetter interface {
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Get() uintptr;
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}
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func (p *pp) printField(field reflect.Value, plus, sharp bool, depth int) (was_string bool) {
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inter := field.Interface();
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if inter != nil {
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switch {
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default:
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if stringer, ok := inter.(Stringer); ok {
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p.addstr(stringer.String());
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return false; // this value is not a string
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}
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case sharp:
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if stringer, ok := inter.(GoStringer); ok {
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p.addstr(stringer.GoString());
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return false; // this value is not a string
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}
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}
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}
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s := "";
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BigSwitch:
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switch f := field.(type) {
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case *reflect.BoolValue:
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s = p.fmt.Fmt_boolean(f.Get()).Str();
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case *reflect.Float32Value:
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s = p.fmt.Fmt_g32(f.Get()).Str();
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case *reflect.Float64Value:
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s = p.fmt.Fmt_g64(f.Get()).Str();
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case *reflect.FloatValue:
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if field.Type().Size() * 8 == 32 {
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s = p.fmt.Fmt_g32(float32(f.Get())).Str();
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} else {
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s = p.fmt.Fmt_g64(float64(f.Get())).Str();
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}
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case *reflect.StringValue:
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if sharp {
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s = p.fmt.Fmt_q(f.Get()).Str();
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} else {
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s = p.fmt.Fmt_s(f.Get()).Str();
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was_string = true;
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}
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case *reflect.MapValue:
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if sharp {
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p.addstr(field.Type().String());
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p.addstr("{");
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} else {
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p.addstr("map[");
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}
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keys := f.Keys();
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for i, key := range keys {
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if i > 0 {
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if sharp {
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p.addstr(", ");
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} else {
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p.addstr(" ");
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}
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}
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p.printField(key, plus, sharp, depth+1);
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p.addstr(":");
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p.printField(f.Elem(key), plus, sharp, depth+1);
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}
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if sharp {
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p.addstr("}");
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} else {
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p.addstr("]");
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}
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case *reflect.StructValue:
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if sharp {
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p.addstr(field.Type().String());
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}
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p.add('{');
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v := f;
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t := v.Type().(*reflect.StructType);
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p.fmt.clearflags(); // clear flags for p.printField
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for i := 0; i < v.NumField(); i++ {
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if i > 0 {
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if sharp {
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p.addstr(", ");
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} else {
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p.addstr(" ");
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}
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}
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if plus || sharp {
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if f := t.Field(i); f.Name != "" {
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p.addstr(f.Name);
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p.add(':');
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}
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}
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p.printField(getField(v, i), plus, sharp, depth+1);
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}
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p.addstr("}");
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case *reflect.InterfaceValue:
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value := f.Elem();
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if value == nil {
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if sharp {
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p.addstr(field.Type().String());
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p.addstr("(nil)");
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} else {
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s = "<nil>";
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}
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} else {
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return p.printField(value, plus, sharp, depth+1);
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}
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case reflect.ArrayOrSliceValue:
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if sharp {
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p.addstr(field.Type().String());
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p.addstr("{");
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} else {
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p.addstr("[");
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}
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for i := 0; i < f.Len(); i++ {
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if i > 0 {
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if sharp {
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p.addstr(", ");
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} else {
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p.addstr(" ");
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}
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}
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p.printField(f.Elem(i), plus, sharp, depth+1);
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}
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if sharp {
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p.addstr("}");
|
|
} else {
|
|
p.addstr("]");
|
|
}
|
|
case *reflect.PtrValue:
|
|
v := f.Get();
|
|
// pointer to array or slice or struct? ok at top level
|
|
// but not embedded (avoid loops)
|
|
if v != 0 && depth == 0 {
|
|
switch a := f.Elem().(type) {
|
|
case reflect.ArrayOrSliceValue:
|
|
p.addstr("&");
|
|
p.printField(a, plus, sharp, depth+1);
|
|
break BigSwitch;
|
|
case *reflect.StructValue:
|
|
p.addstr("&");
|
|
p.printField(a, plus, sharp, depth+1);
|
|
break BigSwitch;
|
|
}
|
|
}
|
|
if sharp {
|
|
p.addstr("(");
|
|
p.addstr(field.Type().String());
|
|
p.addstr(")(");
|
|
if v == 0 {
|
|
p.addstr("nil");
|
|
} else {
|
|
p.fmt.sharp = true;
|
|
p.addstr(p.fmt.Fmt_ux64(uint64(v)).Str());
|
|
}
|
|
p.addstr(")");
|
|
break;
|
|
}
|
|
if v == 0 {
|
|
s = "<nil>";
|
|
break;
|
|
}
|
|
p.fmt.sharp = true; // turn 0x on
|
|
s = p.fmt.Fmt_ux64(uint64(v)).Str();
|
|
case uintptrGetter:
|
|
v := f.Get();
|
|
if sharp {
|
|
p.addstr("(");
|
|
p.addstr(field.Type().String());
|
|
p.addstr(")(");
|
|
if v == 0 {
|
|
p.addstr("nil");
|
|
} else {
|
|
p.fmt.sharp = true;
|
|
p.addstr(p.fmt.Fmt_ux64(uint64(v)).Str());
|
|
}
|
|
p.addstr(")");
|
|
} else {
|
|
p.fmt.sharp = true; // turn 0x on
|
|
p.addstr(p.fmt.Fmt_ux64(uint64(f.Get())).Str());
|
|
}
|
|
default:
|
|
v, signed, ok := getInt(field);
|
|
if ok {
|
|
if signed {
|
|
s = p.fmt.Fmt_d64(v).Str();
|
|
} else {
|
|
if sharp {
|
|
p.fmt.sharp = true; // turn on 0x
|
|
s = p.fmt.Fmt_ux64(uint64(v)).Str();
|
|
} else {
|
|
s = p.fmt.Fmt_ud64(uint64(v)).Str();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
s = "?" + field.Type().String() + "?";
|
|
}
|
|
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:len(format)]);
|
|
if c != '%' || i == end {
|
|
p.add(c);
|
|
i += w;
|
|
continue;
|
|
}
|
|
i++;
|
|
// flags and widths
|
|
p.fmt.clearflags();
|
|
F: for ; i < end; i++ {
|
|
switch format[i] {
|
|
case '#':
|
|
p.fmt.sharp = true;
|
|
case '0':
|
|
p.fmt.zero = true;
|
|
case '+':
|
|
p.fmt.plus = true;
|
|
case '-':
|
|
p.fmt.minus = true;
|
|
case ' ':
|
|
p.fmt.space = true;
|
|
default:
|
|
break F;
|
|
}
|
|
}
|
|
// do we have 20 (width)?
|
|
p.fmt.wid, p.fmt.wid_present, 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);
|
|
}
|
|
c, w = utf8.DecodeRuneInString(format[i:len(format)]);
|
|
i += w;
|
|
// percent is special - absorbs no operand
|
|
if c == '%' {
|
|
p.add('%'); // TODO: should we bother with width & prec?
|
|
continue;
|
|
}
|
|
if fieldnum >= v.NumField() { // out of operands
|
|
p.add('%');
|
|
p.add(c);
|
|
p.addstr("(missing)");
|
|
continue;
|
|
}
|
|
field := getField(v, fieldnum);
|
|
fieldnum++;
|
|
|
|
// Try formatter except for %T,
|
|
// which is special and handled internally.
|
|
inter := field.Interface();
|
|
if inter != nil && c != 'T' {
|
|
if formatter, ok := inter.(Formatter); ok {
|
|
formatter.Format(p, c);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
s := "";
|
|
switch c {
|
|
// bool
|
|
case 't':
|
|
if v, ok := getBool(field); ok {
|
|
if v {
|
|
s = "true";
|
|
} else {
|
|
s = "false";
|
|
}
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
|
|
// int
|
|
case 'b':
|
|
if v, _, ok := getInt(field); ok {
|
|
s = p.fmt.Fmt_b64(uint64(v)).Str(); // always unsigned
|
|
} else if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_fb32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_fb64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'c':
|
|
if v, _, ok := getInt(field); ok {
|
|
s = p.fmt.Fmt_c(int(v)).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'd':
|
|
if v, signed, ok := getInt(field); ok {
|
|
if signed {
|
|
s = p.fmt.Fmt_d64(v).Str();
|
|
} else {
|
|
s = p.fmt.Fmt_ud64(uint64(v)).Str();
|
|
}
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'o':
|
|
if v, signed, ok := getInt(field); ok {
|
|
if signed {
|
|
s = p.fmt.Fmt_o64(v).Str();
|
|
} else {
|
|
s = p.fmt.Fmt_uo64(uint64(v)).Str();
|
|
}
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'x':
|
|
if v, signed, ok := getInt(field); ok {
|
|
if signed {
|
|
s = p.fmt.Fmt_x64(v).Str();
|
|
} else {
|
|
s = p.fmt.Fmt_ux64(uint64(v)).Str();
|
|
}
|
|
} else if v, ok := getString(field); ok {
|
|
s = p.fmt.Fmt_sx(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'X':
|
|
if v, signed, ok := getInt(field); ok {
|
|
if signed {
|
|
s = p.fmt.Fmt_X64(v).Str();
|
|
} else {
|
|
s = p.fmt.Fmt_uX64(uint64(v)).Str();
|
|
}
|
|
} else if v, ok := getString(field); ok {
|
|
s = p.fmt.Fmt_sX(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
|
|
// float
|
|
case 'e':
|
|
if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_e32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_e64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'E':
|
|
if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_E32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_E64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'f':
|
|
if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_f32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_f64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'g':
|
|
if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_g32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_g64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'G':
|
|
if v, ok := getFloat32(field); ok {
|
|
s = p.fmt.Fmt_G32(v).Str();
|
|
} else if v, ok := getFloat64(field); ok {
|
|
s = p.fmt.Fmt_G64(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
|
|
// string
|
|
case 's':
|
|
if inter != nil {
|
|
// if object implements String, use the result.
|
|
if stringer, ok := inter.(Stringer); ok {
|
|
s = p.fmt.Fmt_s(stringer.String()).Str();
|
|
break;
|
|
}
|
|
}
|
|
if v, ok := getString(field); ok {
|
|
s = p.fmt.Fmt_s(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
case 'q':
|
|
if v, ok := getString(field); ok {
|
|
s = p.fmt.Fmt_q(v).Str();
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
|
|
// pointer
|
|
case 'p':
|
|
if v, ok := getPtr(field); ok {
|
|
if v == 0 {
|
|
s = "<nil>";
|
|
} else {
|
|
s = "0x" + p.fmt.Fmt_uX64(uint64(v)).Str();
|
|
}
|
|
} else {
|
|
goto badtype;
|
|
}
|
|
|
|
// arbitrary value; do your best
|
|
case 'v':
|
|
plus, sharp := p.fmt.plus, p.fmt.sharp;
|
|
p.fmt.plus = false;
|
|
p.fmt.sharp = false;
|
|
p.printField(field, plus, sharp, 0);
|
|
|
|
// the value's type
|
|
case 'T':
|
|
s = field.Type().String();
|
|
|
|
default:
|
|
badtype:
|
|
s = "%" + string(c) + "(" + field.Type().String() + "=";
|
|
p.addstr(s);
|
|
p.printField(field, false, false, 0);
|
|
s = ")";
|
|
}
|
|
p.addstr(s);
|
|
}
|
|
if fieldnum < v.NumField() {
|
|
p.addstr("?(extra ");
|
|
for ; fieldnum < v.NumField(); fieldnum++ {
|
|
field := getField(v, fieldnum);
|
|
p.addstr(field.Type().String());
|
|
p.addstr("=");
|
|
p.printField(field, false, false, 0);
|
|
if fieldnum+1 < v.NumField() {
|
|
p.addstr(", ");
|
|
}
|
|
}
|
|
p.addstr(")");
|
|
}
|
|
}
|
|
|
|
func (p *pp) doprint(v *reflect.StructValue, addspace, addnewline bool) {
|
|
prev_string := false;
|
|
for fieldnum := 0; fieldnum < v.NumField(); fieldnum++ {
|
|
// always add spaces if we're doing println
|
|
field := getField(v, fieldnum);
|
|
if fieldnum > 0 {
|
|
_, is_string := field.(*reflect.StringValue);
|
|
if addspace || !is_string && !prev_string {
|
|
p.add(' ');
|
|
}
|
|
}
|
|
prev_string = p.printField(field, false, false, 0);
|
|
}
|
|
if addnewline {
|
|
p.add('\n');
|
|
}
|
|
}
|