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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/github.com/lib/pq@v1.10.7/hstore/hstore.go | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/github.com/lib/pq@v1.10.7/hstore/hstore.go b/dependencies/pkg/mod/github.com/lib/pq@v1.10.7/hstore/hstore.go new file mode 100644 index 0000000..f1470db --- /dev/null +++ b/dependencies/pkg/mod/github.com/lib/pq@v1.10.7/hstore/hstore.go @@ -0,0 +1,118 @@ +package hstore + +import ( + "database/sql" + "database/sql/driver" + "strings" +) + +// Hstore is a wrapper for transferring Hstore values back and forth easily. +type Hstore struct { + Map map[string]sql.NullString +} + +// escapes and quotes hstore keys/values +// s should be a sql.NullString or string +func hQuote(s interface{}) string { + var str string + switch v := s.(type) { + case sql.NullString: + if !v.Valid { + return "NULL" + } + str = v.String + case string: + str = v + default: + panic("not a string or sql.NullString") + } + + str = strings.Replace(str, "\\", "\\\\", -1) + return `"` + strings.Replace(str, "\"", "\\\"", -1) + `"` +} + +// Scan implements the Scanner interface. +// +// Note h.Map is reallocated before the scan to clear existing values. If the +// hstore column's database value is NULL, then h.Map is set to nil instead. +func (h *Hstore) Scan(value interface{}) error { + if value == nil { + h.Map = nil + return nil + } + h.Map = make(map[string]sql.NullString) + var b byte + pair := [][]byte{{}, {}} + pi := 0 + inQuote := false + didQuote := false + sawSlash := false + bindex := 0 + for bindex, b = range value.([]byte) { + if sawSlash { + pair[pi] = append(pair[pi], b) + sawSlash = false + continue + } + + switch b { + case '\\': + sawSlash = true + continue + case '"': + inQuote = !inQuote + if !didQuote { + didQuote = true + } + continue + default: + if !inQuote { + switch b { + case ' ', '\t', '\n', '\r': + continue + case '=': + continue + case '>': + pi = 1 + didQuote = false + continue + case ',': + s := string(pair[1]) + if !didQuote && len(s) == 4 && strings.ToLower(s) == "null" { + h.Map[string(pair[0])] = sql.NullString{String: "", Valid: false} + } else { + h.Map[string(pair[0])] = sql.NullString{String: string(pair[1]), Valid: true} + } + pair[0] = []byte{} + pair[1] = []byte{} + pi = 0 + continue + } + } + } + pair[pi] = append(pair[pi], b) + } + if bindex > 0 { + s := string(pair[1]) + if !didQuote && len(s) == 4 && strings.ToLower(s) == "null" { + h.Map[string(pair[0])] = sql.NullString{String: "", Valid: false} + } else { + h.Map[string(pair[0])] = sql.NullString{String: string(pair[1]), Valid: true} + } + } + return nil +} + +// Value implements the driver Valuer interface. Note if h.Map is nil, the +// database column value will be set to NULL. +func (h Hstore) Value() (driver.Value, error) { + if h.Map == nil { + return nil, nil + } + parts := []string{} + for key, val := range h.Map { + thispart := hQuote(key) + "=>" + hQuote(val) + parts = append(parts, thispart) + } + return []byte(strings.Join(parts, ",")), nil +} |