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Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [encoding/] [json/] [indent.go] - Blame information for rev 801

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// Copyright 2010 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
 
package json
 
import "bytes"
 
// Compact appends to dst the JSON-encoded src with
// insignificant space characters elided.
func Compact(dst *bytes.Buffer, src []byte) error {
        origLen := dst.Len()
        var scan scanner
        scan.reset()
        start := 0
        for i, c := range src {
                v := scan.step(&scan, int(c))
                if v >= scanSkipSpace {
                        if v == scanError {
                                break
                        }
                        if start < i {
                                dst.Write(src[start:i])
                        }
                        start = i + 1
                }
        }
        if scan.eof() == scanError {
                dst.Truncate(origLen)
                return scan.err
        }
        if start < len(src) {
                dst.Write(src[start:])
        }
        return nil
}
 
func newline(dst *bytes.Buffer, prefix, indent string, depth int) {
        dst.WriteByte('\n')
        dst.WriteString(prefix)
        for i := 0; i < depth; i++ {
                dst.WriteString(indent)
        }
}
 
// Indent appends to dst an indented form of the JSON-encoded src.
// Each element in a JSON object or array begins on a new,
// indented line beginning with prefix followed by one or more
// copies of indent according to the indentation nesting.
// The data appended to dst has no trailing newline, to make it easier
// to embed inside other formatted JSON data.
func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
        origLen := dst.Len()
        var scan scanner
        scan.reset()
        needIndent := false
        depth := 0
        for _, c := range src {
                scan.bytes++
                v := scan.step(&scan, int(c))
                if v == scanSkipSpace {
                        continue
                }
                if v == scanError {
                        break
                }
                if needIndent && v != scanEndObject && v != scanEndArray {
                        needIndent = false
                        depth++
                        newline(dst, prefix, indent, depth)
                }
 
                // Emit semantically uninteresting bytes
                // (in particular, punctuation in strings) unmodified.
                if v == scanContinue {
                        dst.WriteByte(c)
                        continue
                }
 
                // Add spacing around real punctuation.
                switch c {
                case '{', '[':
                        // delay indent so that empty object and array are formatted as {} and [].
                        needIndent = true
                        dst.WriteByte(c)
 
                case ',':
                        dst.WriteByte(c)
                        newline(dst, prefix, indent, depth)
 
                case ':':
                        dst.WriteByte(c)
                        dst.WriteByte(' ')
 
                case '}', ']':
                        if needIndent {
                                // suppress indent in empty object/array
                                needIndent = false
                        } else {
                                depth--
                                newline(dst, prefix, indent, depth)
                        }
                        dst.WriteByte(c)
 
                default:
                        dst.WriteByte(c)
                }
        }
        if scan.eof() == scanError {
                dst.Truncate(origLen)
                return scan.err
        }
        return nil
}

Line No.	Rev	Author	Line
1	747	jeremybenn	`// Copyright 2010 The Go Authors. All rights reserved.`
2			`// Use of this source code is governed by a BSD-style`
3			`// license that can be found in the LICENSE file.`
4
5			`package json`
6
7			`import "bytes"`
8
9			`// Compact appends to dst the JSON-encoded src with`
10			`// insignificant space characters elided.`
11			`func Compact(dst *bytes.Buffer, src []byte) error {`
12			`origLen := dst.Len()`
13			`var scan scanner`
14			`scan.reset()`
15			`start := 0`
16			`for i, c := range src {`
17			`v := scan.step(&scan, int(c))`
18			`if v >= scanSkipSpace {`
19			`if v == scanError {`
20			`break`
21			`}`
22			`if start < i {`
23			`dst.Write(src[start:i])`
24			`}`
25			`start = i + 1`
26			`}`
27			`}`
28			`if scan.eof() == scanError {`
29			`dst.Truncate(origLen)`
30			`return scan.err`
31			`}`
32			`if start < len(src) {`
33			`dst.Write(src[start:])`
34			`}`
35			`return nil`
36			`}`
37
38			`func newline(dst *bytes.Buffer, prefix, indent string, depth int) {`
39			`dst.WriteByte('\n')`
40			`dst.WriteString(prefix)`
41			`for i := 0; i < depth; i++ {`
42			`dst.WriteString(indent)`
43			`}`
44			`}`
45
46			`// Indent appends to dst an indented form of the JSON-encoded src.`
47			`// Each element in a JSON object or array begins on a new,`
48			`// indented line beginning with prefix followed by one or more`
49			`// copies of indent according to the indentation nesting.`
50			`// The data appended to dst has no trailing newline, to make it easier`
51			`// to embed inside other formatted JSON data.`
52			`func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {`
53			`origLen := dst.Len()`
54			`var scan scanner`
55			`scan.reset()`
56			`needIndent := false`
57			`depth := 0`
58			`for _, c := range src {`
59			`scan.bytes++`
60			`v := scan.step(&scan, int(c))`
61			`if v == scanSkipSpace {`
62			`continue`
63			`}`
64			`if v == scanError {`
65			`break`
66			`}`
67			`if needIndent && v != scanEndObject && v != scanEndArray {`
68			`needIndent = false`
69			`depth++`
70			`newline(dst, prefix, indent, depth)`
71			`}`
72
73			`// Emit semantically uninteresting bytes`
74			`// (in particular, punctuation in strings) unmodified.`
75			`if v == scanContinue {`
76			`dst.WriteByte(c)`
77			`continue`
78			`}`
79
80			`// Add spacing around real punctuation.`
81			`switch c {`
82			`case '{', '[':`
83			`// delay indent so that empty object and array are formatted as {} and [].`
84			`needIndent = true`
85			`dst.WriteByte(c)`
86
87			`case ',':`
88			`dst.WriteByte(c)`
89			`newline(dst, prefix, indent, depth)`
90
91			`case ':':`
92			`dst.WriteByte(c)`
93			`dst.WriteByte(' ')`
94
95			`case '}', ']':`
96			`if needIndent {`
97			`// suppress indent in empty object/array`
98			`needIndent = false`
99			`} else {`
100			`depth--`
101			`newline(dst, prefix, indent, depth)`
102			`}`
103			`dst.WriteByte(c)`
104
105			`default:`
106			`dst.WriteByte(c)`
107			`}`
108			`}`
109			`if scan.eof() == scanError {`
110			`dst.Truncate(origLen)`
111			`return scan.err`
112			`}`
113			`return nil`
114			`}`

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Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [encoding/] [json/] [indent.go] - Blame information for rev 801