forked from forgejo/forgejo
Added all required dependencies
This commit is contained in:
Thomas Boerger
parent
78f86abba4
commit
1ebb35b988
660 changed files with 502447 additions and 0 deletions
589
vendor/github.com/lib/pq/encode.go
generated
vendored
Normal file
589
vendor/github.com/lib/pq/encode.go
generated
vendored
Normal file
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@ -0,0 +1,589 @@
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package pq
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import (
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"bytes"
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"database/sql/driver"
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"encoding/binary"
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"encoding/hex"
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"errors"
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"fmt"
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"math"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/lib/pq/oid"
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)
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func binaryEncode(parameterStatus *parameterStatus, x interface{}) []byte {
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switch v := x.(type) {
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case []byte:
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return v
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default:
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return encode(parameterStatus, x, oid.T_unknown)
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}
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}
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func encode(parameterStatus *parameterStatus, x interface{}, pgtypOid oid.Oid) []byte {
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switch v := x.(type) {
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case int64:
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return strconv.AppendInt(nil, v, 10)
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case float64:
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return strconv.AppendFloat(nil, v, 'f', -1, 64)
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case []byte:
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if pgtypOid == oid.T_bytea {
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return encodeBytea(parameterStatus.serverVersion, v)
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}
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return v
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case string:
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if pgtypOid == oid.T_bytea {
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return encodeBytea(parameterStatus.serverVersion, []byte(v))
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}
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return []byte(v)
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case bool:
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return strconv.AppendBool(nil, v)
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case time.Time:
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return formatTs(v)
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default:
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errorf("encode: unknown type for %T", v)
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}
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panic("not reached")
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}
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func decode(parameterStatus *parameterStatus, s []byte, typ oid.Oid, f format) interface{} {
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switch f {
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case formatBinary:
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return binaryDecode(parameterStatus, s, typ)
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case formatText:
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return textDecode(parameterStatus, s, typ)
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default:
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panic("not reached")
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}
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}
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func binaryDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) interface{} {
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switch typ {
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case oid.T_bytea:
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return s
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case oid.T_int8:
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return int64(binary.BigEndian.Uint64(s))
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case oid.T_int4:
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return int64(int32(binary.BigEndian.Uint32(s)))
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case oid.T_int2:
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return int64(int16(binary.BigEndian.Uint16(s)))
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default:
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errorf("don't know how to decode binary parameter of type %d", uint32(typ))
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}
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panic("not reached")
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}
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func textDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) interface{} {
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switch typ {
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case oid.T_char, oid.T_varchar, oid.T_text:
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return string(s)
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case oid.T_bytea:
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b, err := parseBytea(s)
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if err != nil {
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errorf("%s", err)
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}
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return b
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case oid.T_timestamptz:
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return parseTs(parameterStatus.currentLocation, string(s))
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case oid.T_timestamp, oid.T_date:
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return parseTs(nil, string(s))
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case oid.T_time:
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return mustParse("15:04:05", typ, s)
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case oid.T_timetz:
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return mustParse("15:04:05-07", typ, s)
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case oid.T_bool:
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return s[0] == 't'
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case oid.T_int8, oid.T_int4, oid.T_int2:
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i, err := strconv.ParseInt(string(s), 10, 64)
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if err != nil {
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errorf("%s", err)
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}
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return i
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case oid.T_float4, oid.T_float8:
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bits := 64
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if typ == oid.T_float4 {
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bits = 32
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}
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f, err := strconv.ParseFloat(string(s), bits)
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if err != nil {
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errorf("%s", err)
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}
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return f
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}
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return s
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}
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// appendEncodedText encodes item in text format as required by COPY
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// and appends to buf
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func appendEncodedText(parameterStatus *parameterStatus, buf []byte, x interface{}) []byte {
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switch v := x.(type) {
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case int64:
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return strconv.AppendInt(buf, v, 10)
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case float64:
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return strconv.AppendFloat(buf, v, 'f', -1, 64)
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case []byte:
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encodedBytea := encodeBytea(parameterStatus.serverVersion, v)
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return appendEscapedText(buf, string(encodedBytea))
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case string:
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return appendEscapedText(buf, v)
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case bool:
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return strconv.AppendBool(buf, v)
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case time.Time:
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return append(buf, formatTs(v)...)
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case nil:
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return append(buf, "\\N"...)
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default:
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errorf("encode: unknown type for %T", v)
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}
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panic("not reached")
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}
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func appendEscapedText(buf []byte, text string) []byte {
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escapeNeeded := false
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startPos := 0
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var c byte
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// check if we need to escape
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for i := 0; i < len(text); i++ {
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c = text[i]
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if c == '\\' || c == '\n' || c == '\r' || c == '\t' {
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escapeNeeded = true
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startPos = i
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break
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}
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}
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if !escapeNeeded {
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return append(buf, text...)
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}
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// copy till first char to escape, iterate the rest
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result := append(buf, text[:startPos]...)
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for i := startPos; i < len(text); i++ {
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c = text[i]
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switch c {
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case '\\':
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result = append(result, '\\', '\\')
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case '\n':
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result = append(result, '\\', 'n')
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case '\r':
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result = append(result, '\\', 'r')
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case '\t':
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result = append(result, '\\', 't')
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default:
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result = append(result, c)
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}
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}
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return result
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}
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func mustParse(f string, typ oid.Oid, s []byte) time.Time {
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str := string(s)
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// check for a 30-minute-offset timezone
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if (typ == oid.T_timestamptz || typ == oid.T_timetz) &&
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str[len(str)-3] == ':' {
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f += ":00"
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}
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t, err := time.Parse(f, str)
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if err != nil {
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errorf("decode: %s", err)
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}
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return t
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}
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var errInvalidTimestamp = errors.New("invalid timestamp")
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type timestampParser struct {
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err error
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}
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func (p *timestampParser) expect(str string, char byte, pos int) {
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if p.err != nil {
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return
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}
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if pos+1 > len(str) {
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p.err = errInvalidTimestamp
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return
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}
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if c := str[pos]; c != char && p.err == nil {
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p.err = fmt.Errorf("expected '%v' at position %v; got '%v'", char, pos, c)
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}
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}
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func (p *timestampParser) mustAtoi(str string, begin int, end int) int {
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if p.err != nil {
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return 0
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}
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if begin < 0 || end < 0 || begin > end || end > len(str) {
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p.err = errInvalidTimestamp
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return 0
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}
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result, err := strconv.Atoi(str[begin:end])
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if err != nil {
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if p.err == nil {
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p.err = fmt.Errorf("expected number; got '%v'", str)
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}
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return 0
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}
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return result
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}
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// The location cache caches the time zones typically used by the client.
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type locationCache struct {
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cache map[int]*time.Location
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lock sync.Mutex
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}
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// All connections share the same list of timezones. Benchmarking shows that
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// about 5% speed could be gained by putting the cache in the connection and
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// losing the mutex, at the cost of a small amount of memory and a somewhat
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// significant increase in code complexity.
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var globalLocationCache = newLocationCache()
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func newLocationCache() *locationCache {
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return &locationCache{cache: make(map[int]*time.Location)}
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}
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// Returns the cached timezone for the specified offset, creating and caching
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// it if necessary.
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func (c *locationCache) getLocation(offset int) *time.Location {
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c.lock.Lock()
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defer c.lock.Unlock()
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location, ok := c.cache[offset]
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if !ok {
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location = time.FixedZone("", offset)
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c.cache[offset] = location
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}
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return location
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}
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var infinityTsEnabled = false
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var infinityTsNegative time.Time
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var infinityTsPositive time.Time
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const (
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infinityTsEnabledAlready = "pq: infinity timestamp enabled already"
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infinityTsNegativeMustBeSmaller = "pq: infinity timestamp: negative value must be smaller (before) than positive"
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)
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// EnableInfinityTs controls the handling of Postgres' "-infinity" and
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// "infinity" "timestamp"s.
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//
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// If EnableInfinityTs is not called, "-infinity" and "infinity" will return
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// []byte("-infinity") and []byte("infinity") respectively, and potentially
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// cause error "sql: Scan error on column index 0: unsupported driver -> Scan
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// pair: []uint8 -> *time.Time", when scanning into a time.Time value.
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//
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// Once EnableInfinityTs has been called, all connections created using this
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// driver will decode Postgres' "-infinity" and "infinity" for "timestamp",
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// "timestamp with time zone" and "date" types to the predefined minimum and
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// maximum times, respectively. When encoding time.Time values, any time which
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// equals or precedes the predefined minimum time will be encoded to
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// "-infinity". Any values at or past the maximum time will similarly be
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// encoded to "infinity".
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//
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// If EnableInfinityTs is called with negative >= positive, it will panic.
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// Calling EnableInfinityTs after a connection has been established results in
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// undefined behavior. If EnableInfinityTs is called more than once, it will
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// panic.
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func EnableInfinityTs(negative time.Time, positive time.Time) {
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if infinityTsEnabled {
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panic(infinityTsEnabledAlready)
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}
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if !negative.Before(positive) {
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panic(infinityTsNegativeMustBeSmaller)
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}
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infinityTsEnabled = true
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infinityTsNegative = negative
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infinityTsPositive = positive
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}
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/*
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* Testing might want to toggle infinityTsEnabled
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*/
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func disableInfinityTs() {
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infinityTsEnabled = false
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}
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// This is a time function specific to the Postgres default DateStyle
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// setting ("ISO, MDY"), the only one we currently support. This
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// accounts for the discrepancies between the parsing available with
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// time.Parse and the Postgres date formatting quirks.
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func parseTs(currentLocation *time.Location, str string) interface{} {
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switch str {
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case "-infinity":
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if infinityTsEnabled {
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return infinityTsNegative
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}
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return []byte(str)
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case "infinity":
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if infinityTsEnabled {
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return infinityTsPositive
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}
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return []byte(str)
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}
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t, err := ParseTimestamp(currentLocation, str)
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if err != nil {
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panic(err)
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}
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return t
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}
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// ParseTimestamp parses Postgres' text format. It returns a time.Time in
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// currentLocation iff that time's offset agrees with the offset sent from the
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// Postgres server. Otherwise, ParseTimestamp returns a time.Time with the
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// fixed offset offset provided by the Postgres server.
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func ParseTimestamp(currentLocation *time.Location, str string) (time.Time, error) {
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p := timestampParser{}
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monSep := strings.IndexRune(str, '-')
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// this is Gregorian year, not ISO Year
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// In Gregorian system, the year 1 BC is followed by AD 1
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year := p.mustAtoi(str, 0, monSep)
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daySep := monSep + 3
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month := p.mustAtoi(str, monSep+1, daySep)
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p.expect(str, '-', daySep)
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timeSep := daySep + 3
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day := p.mustAtoi(str, daySep+1, timeSep)
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var hour, minute, second int
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if len(str) > monSep+len("01-01")+1 {
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p.expect(str, ' ', timeSep)
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minSep := timeSep + 3
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p.expect(str, ':', minSep)
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hour = p.mustAtoi(str, timeSep+1, minSep)
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secSep := minSep + 3
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p.expect(str, ':', secSep)
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minute = p.mustAtoi(str, minSep+1, secSep)
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secEnd := secSep + 3
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second = p.mustAtoi(str, secSep+1, secEnd)
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}
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remainderIdx := monSep + len("01-01 00:00:00") + 1
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// Three optional (but ordered) sections follow: the
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// fractional seconds, the time zone offset, and the BC
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// designation. We set them up here and adjust the other
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// offsets if the preceding sections exist.
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nanoSec := 0
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tzOff := 0
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if remainderIdx < len(str) && str[remainderIdx] == '.' {
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fracStart := remainderIdx + 1
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fracOff := strings.IndexAny(str[fracStart:], "-+ ")
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if fracOff < 0 {
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fracOff = len(str) - fracStart
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}
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fracSec := p.mustAtoi(str, fracStart, fracStart+fracOff)
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nanoSec = fracSec * (1000000000 / int(math.Pow(10, float64(fracOff))))
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remainderIdx += fracOff + 1
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}
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if tzStart := remainderIdx; tzStart < len(str) && (str[tzStart] == '-' || str[tzStart] == '+') {
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// time zone separator is always '-' or '+' (UTC is +00)
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var tzSign int
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switch c := str[tzStart]; c {
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case '-':
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tzSign = -1
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case '+':
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tzSign = +1
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default:
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return time.Time{}, fmt.Errorf("expected '-' or '+' at position %v; got %v", tzStart, c)
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}
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tzHours := p.mustAtoi(str, tzStart+1, tzStart+3)
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remainderIdx += 3
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var tzMin, tzSec int
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if remainderIdx < len(str) && str[remainderIdx] == ':' {
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tzMin = p.mustAtoi(str, remainderIdx+1, remainderIdx+3)
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remainderIdx += 3
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}
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if remainderIdx < len(str) && str[remainderIdx] == ':' {
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tzSec = p.mustAtoi(str, remainderIdx+1, remainderIdx+3)
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remainderIdx += 3
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}
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tzOff = tzSign * ((tzHours * 60 * 60) + (tzMin * 60) + tzSec)
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}
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var isoYear int
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if remainderIdx+3 <= len(str) && str[remainderIdx:remainderIdx+3] == " BC" {
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isoYear = 1 - year
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remainderIdx += 3
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} else {
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isoYear = year
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}
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if remainderIdx < len(str) {
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return time.Time{}, fmt.Errorf("expected end of input, got %v", str[remainderIdx:])
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}
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t := time.Date(isoYear, time.Month(month), day,
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hour, minute, second, nanoSec,
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globalLocationCache.getLocation(tzOff))
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if currentLocation != nil {
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// Set the location of the returned Time based on the session's
|
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// TimeZone value, but only if the local time zone database agrees with
|
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// the remote database on the offset.
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lt := t.In(currentLocation)
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_, newOff := lt.Zone()
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if newOff == tzOff {
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t = lt
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}
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}
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return t, p.err
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}
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// formatTs formats t into a format postgres understands.
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func formatTs(t time.Time) []byte {
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if infinityTsEnabled {
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// t <= -infinity : ! (t > -infinity)
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if !t.After(infinityTsNegative) {
|
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return []byte("-infinity")
|
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}
|
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// t >= infinity : ! (!t < infinity)
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if !t.Before(infinityTsPositive) {
|
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return []byte("infinity")
|
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}
|
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}
|
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return FormatTimestamp(t)
|
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}
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|
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// FormatTimestamp formats t into Postgres' text format for timestamps.
|
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func FormatTimestamp(t time.Time) []byte {
|
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// Need to send dates before 0001 A.D. with " BC" suffix, instead of the
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// minus sign preferred by Go.
|
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// Beware, "0000" in ISO is "1 BC", "-0001" is "2 BC" and so on
|
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bc := false
|
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if t.Year() <= 0 {
|
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// flip year sign, and add 1, e.g: "0" will be "1", and "-10" will be "11"
|
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t = t.AddDate((-t.Year())*2+1, 0, 0)
|
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bc = true
|
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}
|
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b := []byte(t.Format(time.RFC3339Nano))
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|
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_, offset := t.Zone()
|
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offset = offset % 60
|
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if offset != 0 {
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// RFC3339Nano already printed the minus sign
|
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if offset < 0 {
|
||||
offset = -offset
|
||||
}
|
||||
|
||||
b = append(b, ':')
|
||||
if offset < 10 {
|
||||
b = append(b, '0')
|
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}
|
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b = strconv.AppendInt(b, int64(offset), 10)
|
||||
}
|
||||
|
||||
if bc {
|
||||
b = append(b, " BC"...)
|
||||
}
|
||||
return b
|
||||
}
|
||||
|
||||
// Parse a bytea value received from the server. Both "hex" and the legacy
|
||||
// "escape" format are supported.
|
||||
func parseBytea(s []byte) (result []byte, err error) {
|
||||
if len(s) >= 2 && bytes.Equal(s[:2], []byte("\\x")) {
|
||||
// bytea_output = hex
|
||||
s = s[2:] // trim off leading "\\x"
|
||||
result = make([]byte, hex.DecodedLen(len(s)))
|
||||
_, err := hex.Decode(result, s)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else {
|
||||
// bytea_output = escape
|
||||
for len(s) > 0 {
|
||||
if s[0] == '\\' {
|
||||
// escaped '\\'
|
||||
if len(s) >= 2 && s[1] == '\\' {
|
||||
result = append(result, '\\')
|
||||
s = s[2:]
|
||||
continue
|
||||
}
|
||||
|
||||
// '\\' followed by an octal number
|
||||
if len(s) < 4 {
|
||||
return nil, fmt.Errorf("invalid bytea sequence %v", s)
|
||||
}
|
||||
r, err := strconv.ParseInt(string(s[1:4]), 8, 9)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("could not parse bytea value: %s", err.Error())
|
||||
}
|
||||
result = append(result, byte(r))
|
||||
s = s[4:]
|
||||
} else {
|
||||
// We hit an unescaped, raw byte. Try to read in as many as
|
||||
// possible in one go.
|
||||
i := bytes.IndexByte(s, '\\')
|
||||
if i == -1 {
|
||||
result = append(result, s...)
|
||||
break
|
||||
}
|
||||
result = append(result, s[:i]...)
|
||||
s = s[i:]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return result, nil
|
||||
}
|
||||
|
||||
func encodeBytea(serverVersion int, v []byte) (result []byte) {
|
||||
if serverVersion >= 90000 {
|
||||
// Use the hex format if we know that the server supports it
|
||||
result = make([]byte, 2+hex.EncodedLen(len(v)))
|
||||
result[0] = '\\'
|
||||
result[1] = 'x'
|
||||
hex.Encode(result[2:], v)
|
||||
} else {
|
||||
// .. or resort to "escape"
|
||||
for _, b := range v {
|
||||
if b == '\\' {
|
||||
result = append(result, '\\', '\\')
|
||||
} else if b < 0x20 || b > 0x7e {
|
||||
result = append(result, []byte(fmt.Sprintf("\\%03o", b))...)
|
||||
} else {
|
||||
result = append(result, b)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
// NullTime represents a time.Time that may be null. NullTime implements the
|
||||
// sql.Scanner interface so it can be used as a scan destination, similar to
|
||||
// sql.NullString.
|
||||
type NullTime struct {
|
||||
Time time.Time
|
||||
Valid bool // Valid is true if Time is not NULL
|
||||
}
|
||||
|
||||
// Scan implements the Scanner interface.
|
||||
func (nt *NullTime) Scan(value interface{}) error {
|
||||
nt.Time, nt.Valid = value.(time.Time)
|
||||
return nil
|
||||
}
|
||||
|
||||
// Value implements the driver Valuer interface.
|
||||
func (nt NullTime) Value() (driver.Value, error) {
|
||||
if !nt.Valid {
|
||||
return nil, nil
|
||||
}
|
||||
return nt.Time, nil
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue