66 lines
1.5 KiB
Go
66 lines
1.5 KiB
Go
package gojay
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const hex = "0123456789abcdef"
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// grow grows b's capacity, if necessary, to guarantee space for
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// another n bytes. After grow(n), at least n bytes can be written to b
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// without another allocation. If n is negative, grow panics.
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func (enc *Encoder) grow(n int) {
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if cap(enc.buf)-len(enc.buf) < n {
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Buf := make([]byte, len(enc.buf), 2*cap(enc.buf)+n)
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copy(Buf, enc.buf)
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enc.buf = Buf
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}
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}
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// Write appends the contents of p to b's Buffer.
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// Write always returns len(p), nil.
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func (enc *Encoder) writeBytes(p []byte) {
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enc.buf = append(enc.buf, p...)
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}
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func (enc *Encoder) writeTwoBytes(b1 byte, b2 byte) {
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enc.buf = append(enc.buf, b1, b2)
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}
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// WriteByte appends the byte c to b's Buffer.
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// The returned error is always nil.
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func (enc *Encoder) writeByte(c byte) {
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enc.buf = append(enc.buf, c)
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}
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// WriteString appends the contents of s to b's Buffer.
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// It returns the length of s and a nil error.
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func (enc *Encoder) writeString(s string) {
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enc.buf = append(enc.buf, s...)
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}
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func (enc *Encoder) writeStringEscape(s string) {
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l := len(s)
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for i := 0; i < l; i++ {
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c := s[i]
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if c >= 0x20 && c != '\\' && c != '"' {
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enc.writeByte(c)
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continue
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}
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switch c {
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case '\\', '"':
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enc.writeTwoBytes('\\', c)
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case '\n':
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enc.writeTwoBytes('\\', 'n')
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case '\f':
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enc.writeTwoBytes('\\', 'f')
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case '\b':
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enc.writeTwoBytes('\\', 'b')
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case '\r':
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enc.writeTwoBytes('\\', 'r')
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case '\t':
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enc.writeTwoBytes('\\', 't')
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default:
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enc.writeString(`\u00`)
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enc.writeTwoBytes(hex[c>>4], hex[c&0xF])
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}
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continue
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}
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}
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