61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
// VulcanizeDB
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// Copyright © 2021 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package file
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import "bytes"
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// formatPostgresStringArray parses an array of strings into the proper Postgres string representation of that array
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func formatPostgresStringArray(a []string) string {
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if a == nil {
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return ""
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}
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if n := len(a); n > 0 {
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// There will be at least two curly brackets, 2*N bytes of quotes,
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// and N-1 bytes of delimiters.
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b := make([]byte, 1, 1+3*n)
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b[0] = '{'
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b = appendArrayQuotedBytes(b, []byte(a[0]))
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for i := 1; i < n; i++ {
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b = append(b, ',')
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b = appendArrayQuotedBytes(b, []byte(a[i]))
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}
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return string(append(b, '}'))
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}
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return "{}"
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}
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func appendArrayQuotedBytes(b, v []byte) []byte {
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b = append(b, '"')
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for {
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i := bytes.IndexAny(v, `"\`)
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if i < 0 {
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b = append(b, v...)
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break
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}
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if i > 0 {
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b = append(b, v[:i]...)
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}
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b = append(b, '\\', v[i])
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v = v[i+1:]
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}
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return append(b, '"')
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}
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