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1 // Copyright 2015 The LUCI Authors. All rights reserved. | 1 // Copyright 2015 The LUCI Authors. All rights reserved. |
2 // Use of this source code is governed under the Apache License, Version 2.0 | 2 // Use of this source code is governed under the Apache License, Version 2.0 |
3 // that can be found in the LICENSE file. | 3 // that can be found in the LICENSE file. |
4 | 4 |
5 package memory | 5 package memory |
6 | 6 |
7 import ( | 7 import ( |
8 "bytes" | 8 "bytes" |
9 "encoding/base64" | 9 "encoding/base64" |
10 "errors" | 10 "errors" |
11 "fmt" | 11 "fmt" |
12 | 12 |
13 ds "github.com/luci/gae/service/datastore" | 13 ds "github.com/luci/gae/service/datastore" |
14 "github.com/luci/gae/service/datastore/serialize" | 14 "github.com/luci/gae/service/datastore/serialize" |
15 » "github.com/luci/luci-go/common/cmpbin" | 15 » "github.com/luci/luci-go/common/data/cmpbin" |
16 » "github.com/luci/luci-go/common/stringset" | 16 » "github.com/luci/luci-go/common/data/stringset" |
17 ) | 17 ) |
18 | 18 |
19 // MaxQueryComponents was lifted from a hard-coded constant in dev_appserver. | 19 // MaxQueryComponents was lifted from a hard-coded constant in dev_appserver. |
20 // No idea if it's a real limit or just a convenience in the current dev | 20 // No idea if it's a real limit or just a convenience in the current dev |
21 // appserver implementation. | 21 // appserver implementation. |
22 const MaxQueryComponents = 100 | 22 const MaxQueryComponents = 100 |
23 | 23 |
24 // MaxIndexColumns is the maximum number of index columns we're willing to | 24 // MaxIndexColumns is the maximum number of index columns we're willing to |
25 // support. | 25 // support. |
26 const MaxIndexColumns = 64 | 26 const MaxIndexColumns = 64 |
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270 // and the new value has overflowed this representation. | 270 // and the new value has overflowed this representation. |
271 // | 271 // |
272 // Fortunately, the first byte of a serialized index column entr
y is a | 272 // Fortunately, the first byte of a serialized index column entr
y is a |
273 // PropertyType byte, and the only valid values that we'll be in
crementing | 273 // PropertyType byte, and the only valid values that we'll be in
crementing |
274 // are never equal to 0xFF, since they have the high bit set (so
either they're | 274 // are never equal to 0xFF, since they have the high bit set (so
either they're |
275 // 0x8*, or 0x7*, depending on if it's inverted). | 275 // 0x8*, or 0x7*, depending on if it's inverted). |
276 impossible(fmt.Errorf("incrementing %v would require more sigfig
s", bstr)) | 276 impossible(fmt.Errorf("incrementing %v would require more sigfig
s", bstr)) |
277 } | 277 } |
278 return ret | 278 return ret |
279 } | 279 } |
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