1//===-- CoreMedia.cpp -----------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "CoreMedia.h"
10
11#include "lldb/Utility/Flags.h"
12#include "lldb/Utility/Log.h"
13
14#include "lldb/Symbol/TypeSystem.h"
15#include "lldb/Target/Target.h"
16#include <cinttypes>
17
18using namespace lldb;
19using namespace lldb_private;
20using namespace lldb_private::formatters;
21
22bool lldb_private::formatters::CMTimeSummaryProvider(
23    ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
24  CompilerType type = valobj.GetCompilerType();
25  if (!type.IsValid())
26    return false;
27
28  auto type_system = type.GetTypeSystem();
29  if (!type_system)
30    return false;
31  // fetch children by offset to compensate for potential lack of debug info
32  auto int64_ty =
33      type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 64);
34  auto int32_ty =
35      type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 32);
36
37  auto value_sp(valobj.GetSyntheticChildAtOffset(0, int64_ty, true));
38  auto timescale_sp(valobj.GetSyntheticChildAtOffset(8, int32_ty, true));
39  auto flags_sp(valobj.GetSyntheticChildAtOffset(12, int32_ty, true));
40
41  if (!value_sp || !timescale_sp || !flags_sp)
42    return false;
43
44  auto value = value_sp->GetValueAsUnsigned(0);
45  auto timescale = (int32_t)timescale_sp->GetValueAsUnsigned(
46      0); // the timescale specifies the fraction of a second each unit in the
47          // numerator occupies
48  auto flags = Flags(flags_sp->GetValueAsUnsigned(0) &
49                     0x00000000000000FF); // the flags I need sit in the LSB
50
51  const unsigned int FlagPositiveInf = 4;
52  const unsigned int FlagNegativeInf = 8;
53  const unsigned int FlagIndefinite = 16;
54
55  if (flags.AnySet(FlagIndefinite)) {
56    stream.Printf("indefinite");
57    return true;
58  }
59
60  if (flags.AnySet(FlagPositiveInf)) {
61    stream.Printf("+oo");
62    return true;
63  }
64
65  if (flags.AnySet(FlagNegativeInf)) {
66    stream.Printf("-oo");
67    return true;
68  }
69
70  switch (timescale) {
71  case 0:
72    return false;
73  case 1:
74    stream.Printf("%" PRId64 " seconds", value);
75    return true;
76  case 2:
77    stream.Printf("%" PRId64 " half seconds", value);
78    return true;
79  case 3:
80    stream.Printf("%" PRId64 " third%sof a second", value,
81                  value == 1 ? " " : "s ");
82    return true;
83  default:
84    stream.Printf("%" PRId64 " %" PRId32 "th%sof a second", value, timescale,
85                  value == 1 ? " " : "s ");
86    return true;
87  }
88}
89