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Reset gojson to golang/go|1.23.4 [removes all custom changes]

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This commit is contained in:
Mike Schwörer
2025-01-10 11:49:29 +01:00
parent b7c48cb467
commit c8e9c34706
18 changed files with 2603 additions and 2512 deletions
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119
gojson/indent.go
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@@ -4,38 +4,67 @@
package json
import (
"bytes"
)
import "bytes"
// HTMLEscape appends to dst the JSON-encoded src with <, >, &, U+2028 and U+2029
// characters inside string literals changed to \u003c, \u003e, \u0026, \u2028, \u2029
// so that the JSON will be safe to embed inside HTML <script> tags.
// For historical reasons, web browsers don't honor standard HTML
// escaping within <script> tags, so an alternative JSON encoding must be used.
func HTMLEscape(dst *bytes.Buffer, src []byte) {
dst.Grow(len(src))
dst.Write(appendHTMLEscape(dst.AvailableBuffer(), src))
}
func appendHTMLEscape(dst, src []byte) []byte {
// The characters can only appear in string literals,
// so just scan the string one byte at a time.
start := 0
for i, c := range src {
if c == '<' || c == '>' || c == '&' {
dst = append(dst, src[start:i]...)
dst = append(dst, '\\', 'u', '0', '0', hex[c>>4], hex[c&0xF])
start = i + 1
}
// Convert U+2028 and U+2029 (E2 80 A8 and E2 80 A9).
if c == 0xE2 && i+2 < len(src) && src[i+1] == 0x80 && src[i+2]&^1 == 0xA8 {
dst = append(dst, src[start:i]...)
dst = append(dst, '\\', 'u', '2', '0', '2', hex[src[i+2]&0xF])
start = i + len("\u2029")
}
}
return append(dst, src[start:]...)
}
// Compact appends to dst the JSON-encoded src with
// insignificant space characters elided.
func Compact(dst *bytes.Buffer, src []byte) error {
return compact(dst, src, false)
dst.Grow(len(src))
b := dst.AvailableBuffer()
b, err := appendCompact(b, src, false)
dst.Write(b)
return err
}
func compact(dst *bytes.Buffer, src []byte, escape bool) error {
origLen := dst.Len()
func appendCompact(dst, src []byte, escape bool) ([]byte, error) {
origLen := len(dst)
scan := newScanner()
defer freeScanner(scan)
start := 0
for i, c := range src {
if escape && (c == '<' || c == '>' || c == '&') {
if start < i {
dst.Write(src[start:i])
dst = append(dst, src[start:i]...)
}
dst.WriteString(`\u00`)
dst.WriteByte(hex[c>>4])
dst.WriteByte(hex[c&0xF])
dst = append(dst, '\\', 'u', '0', '0', hex[c>>4], hex[c&0xF])
start = i + 1
}
// Convert U+2028 and U+2029 (E2 80 A8 and E2 80 A9).
if escape && c == 0xE2 && i+2 < len(src) && src[i+1] == 0x80 && src[i+2]&^1 == 0xA8 {
if start < i {
dst.Write(src[start:i])
dst = append(dst, src[start:i]...)
}
dst.WriteString(`\u202`)
dst.WriteByte(hex[src[i+2]&0xF])
dst = append(dst, '\\', 'u', '2', '0', '2', hex[src[i+2]&0xF])
start = i + 3
}
v := scan.step(scan, c)
@@ -44,29 +73,37 @@ func compact(dst *bytes.Buffer, src []byte, escape bool) error {
break
}
if start < i {
dst.Write(src[start:i])
dst = append(dst, src[start:i]...)
}
start = i + 1
}
}
if scan.eof() == scanError {
dst.Truncate(origLen)
return scan.err
return dst[:origLen], scan.err
}
if start < len(src) {
dst.Write(src[start:])
dst = append(dst, src[start:]...)
}
return nil
return dst, nil
}
func newline(dst *bytes.Buffer, prefix, indent string, depth int) {
dst.WriteByte('\n')
dst.WriteString(prefix)
func appendNewline(dst []byte, prefix, indent string, depth int) []byte {
dst = append(dst, '\n')
dst = append(dst, prefix...)
for i := 0; i < depth; i++ {
dst.WriteString(indent)
dst = append(dst, indent...)
}
return dst
}
// indentGrowthFactor specifies the growth factor of indenting JSON input.
// Empirically, the growth factor was measured to be between 1.4x to 1.8x
// for some set of compacted JSON with the indent being a single tab.
// Specify a growth factor slightly larger than what is observed
// to reduce probability of allocation in appendIndent.
// A factor no higher than 2 ensures that wasted space never exceeds 50%.
const indentGrowthFactor = 2
// 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
@@ -79,7 +116,15 @@ func newline(dst *bytes.Buffer, prefix, indent string, depth int) {
// For example, if src has no trailing spaces, neither will dst;
// if src ends in a trailing newline, so will dst.
func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
origLen := dst.Len()
dst.Grow(indentGrowthFactor * len(src))
b := dst.AvailableBuffer()
b, err := appendIndent(b, src, prefix, indent)
dst.Write(b)
return err
}
func appendIndent(dst, src []byte, prefix, indent string) ([]byte, error) {
origLen := len(dst)
scan := newScanner()
defer freeScanner(scan)
needIndent := false
@@ -96,13 +141,13 @@ func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
if needIndent && v != scanEndObject && v != scanEndArray {
needIndent = false
depth++
newline(dst, prefix, indent, depth)
dst = appendNewline(dst, prefix, indent, depth)
}
// Emit semantically uninteresting bytes
// (in particular, punctuation in strings) unmodified.
if v == scanContinue {
dst.WriteByte(c)
dst = append(dst, c)
continue
}
@@ -111,33 +156,27 @@ func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
case '{', '[':
// delay indent so that empty object and array are formatted as {} and [].
needIndent = true
dst.WriteByte(c)
dst = append(dst, c)
case ',':
dst.WriteByte(c)
newline(dst, prefix, indent, depth)
dst = append(dst, c)
dst = appendNewline(dst, prefix, indent, depth)
case ':':
dst.WriteByte(c)
dst.WriteByte(' ')
dst = append(dst, c, ' ')
case '}', ']':
if needIndent {
// suppress indent in empty object/array
needIndent = false
} else {
depth--
newline(dst, prefix, indent, depth)
dst = appendNewline(dst, prefix, indent, depth)
}
dst.WriteByte(c)
dst = append(dst, c)
default:
dst.WriteByte(c)
dst = append(dst, c)
}
}
if scan.eof() == scanError {
dst.Truncate(origLen)
return scan.err
return dst[:origLen], scan.err
}
return nil
return dst, nil
}