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package lib
import (
"bytes"
)
// * https://en.wikipedia.org/wiki/Tab-separated_values
// * https://www.iana.org/assignments/media-types/text/tab-separated-values
// \n for newline,
// \r for carriage return,
// \t for tab,
// \\ for backslash.
// TSVDecodeField is for the TSV record-reader.
func TSVDecodeField(input string) string {
var buffer bytes.Buffer
n := len(input)
for i := 0; i < n; /* increment in loop */ {
c := input[i]
if c == '\\' && i < n-1 {
d := input[i+1]
if d == '\\' {
buffer.WriteByte('\\')
i += 2
} else if d == 'n' {
buffer.WriteByte('\n')
i += 2
} else if d == 'r' {
buffer.WriteByte('\r')
i += 2
} else if d == 't' {
buffer.WriteByte('\t')
i += 2
} else {
buffer.WriteByte(c)
i++
}
} else {
buffer.WriteByte(c)
i++
}
}
return buffer.String()
}
// TSVEncodeField is for the TSV record-writer.
func TSVEncodeField(input string) string {
var buffer bytes.Buffer
for _, r := range input {
if r == '\\' {
buffer.WriteByte('\\')
buffer.WriteByte('\\')
} else if r == '\n' {
buffer.WriteByte('\\')
buffer.WriteByte('n')
} else if r == '\r' {
buffer.WriteByte('\\')
buffer.WriteByte('r')
} else if r == '\t' {
buffer.WriteByte('\\')
buffer.WriteByte('t')
} else {
buffer.WriteRune(r)
}
}
return buffer.String()
}
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