forked from mirrors/gecko-dev
a0efcbcf74
Covers adding the new JS global `GleanPings` for JS, the new structs for C++ at mozilla::glean_pings, ping-id and string-table-index codegen, the usual boilerplate for JS and C++ stuff, and tests. Unresolved: * What happens if we call this on a non-parent process? (This isn't a supported mode of operation) Differential Revision: https://phabricator.services.mozilla.com/D98671
99 lines
3 KiB
C++
99 lines
3 KiB
C++
// -*- mode: C++ -*-
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// AUTOGENERATED BY glean_parser. DO NOT EDIT.
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_GleanJSPingsLookup_h
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#define mozilla_GleanJSPingsLookup_h
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#define GLEAN_PING_INDEX_BITS (16)
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#define GLEAN_PING_ID(entry) ((entry) >> GLEAN_PING_INDEX_BITS)
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#define GLEAN_PING_INDEX(entry) ((entry) & ((1UL << GLEAN_PING_INDEX_BITS) - 1))
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namespace mozilla::glean {
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// Contains the ping id and the index into the ping string table.
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using ping_entry_t = uint32_t;
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static Maybe<uint32_t> ping_result_check(const nsACString& aKey, ping_entry_t aEntry);
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#if defined(_MSC_VER) && !defined(__clang__)
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const char gPingStringTable[] = {
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#else
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constexpr char gPingStringTable[] = {
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#endif
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/* 0 - "notBaseline" */ 'n', 'o', 't', 'B', 'a', 's', 'e', 'l', 'i', 'n', 'e', '\0',
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/* 12 - "notMetrics" */ 'n', 'o', 't', 'M', 'e', 't', 'r', 'i', 'c', 's', '\0',
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/* 23 - "notEvents" */ 'n', 'o', 't', 'E', 'v', 'e', 'n', 't', 's', '\0',
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/* 33 - "notDeletionRequest" */ 'n', 'o', 't', 'D', 'e', 'l', 'e', 't', 'i', 'o', 'n', 'R', 'e', 'q', 'u', 'e', 's', 't', '\0',
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};
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const ping_entry_t sPingByNameLookupEntries[] = {
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65536,
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196631,
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262177,
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131084
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};
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static Maybe<uint32_t>
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PingByNameLookup(const nsACString& aKey)
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{
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static const uint8_t BASES[] = {
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0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
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const char* bytes = aKey.BeginReading();
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size_t length = aKey.Length();
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auto& entry = mozilla::perfecthash::Lookup(bytes, length, BASES,
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sPingByNameLookupEntries);
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return ping_result_check(aKey, entry);
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}
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/**
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* Get a ping's name given its entry from the PHF.
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*/
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static const char* GetPingName(ping_entry_t aEntry) {
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uint32_t idx = GLEAN_PING_INDEX(aEntry);
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MOZ_ASSERT(idx < sizeof(gPingStringTable), "Ping index larger than string table");
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return &gPingStringTable[idx];
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}
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/**
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* Check if the found entry is pointing at the correct ping.
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* PHF can false-positive a result when the key isn't present, so we check
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* for a string match. If it fails, return Nothing(). If we found it,
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* return the ping's id.
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*/
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static Maybe<uint32_t> ping_result_check(const nsACString& aKey, ping_entry_t aEntry) {
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uint32_t idx = GLEAN_PING_INDEX(aEntry);
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uint32_t id = GLEAN_PING_ID(aEntry);
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if (MOZ_UNLIKELY(idx > sizeof(gPingStringTable))) {
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return Nothing();
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}
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if (aKey.EqualsASCII(&gPingStringTable[idx])) {
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return Some(id);
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}
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return Nothing();
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}
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#undef GLEAN_PING_INDEX_BITS
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#undef GLEAN_PING_ID
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#undef GLEAN_PING_INDEX
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} // namespace mozilla::glean
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#endif // mozilla_GleanJSPingsLookup_h
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