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// Copyright (C) 2017, 2021 Luke Shumaker <lukeshu@lukeshu.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package libfastimport
import (
"strconv"
"strings"
"github.com/pkg/errors"
)
func trimLinePrefix(line string, prefix string) string {
if !strings.HasPrefix(line, prefix) {
panic("line didn't have prefix")
}
if !strings.HasSuffix(line, "\n") {
panic("line didn't have prefix")
}
return strings.TrimSuffix(strings.TrimPrefix(line, prefix), "\n")
}
func parse_data(line string) (data string, err error) {
nl := strings.IndexByte(line, '\n')
if nl < 0 {
return "", errors.Errorf("data: expected newline: %q", data)
}
head := line[:nl+1]
rest := line[nl+1:]
if !strings.HasPrefix(head, "data ") {
return "", errors.Errorf("data: could not parse: %q", data)
}
if strings.HasPrefix(head, "data <<") {
// Delimited format
delim := trimLinePrefix(head, "data <<")
suffix := "\n" + delim + "\n"
if !strings.HasSuffix(rest, suffix) {
return "", errors.Errorf("data: did not find suffix: %q", suffix)
}
data = strings.TrimSuffix(rest, suffix)
} else {
// Exact byte count format
size, err := strconv.Atoi(trimLinePrefix(head, "data "))
if err != nil {
return "", err
}
if size != len(rest) {
panic("FIReader should not have let this happen")
}
data = rest
}
return
}
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