[lldb] NFC modernize codebase with modernize-use-nullptr

Summary:
NFC = [[ https://llvm.org/docs/Lexicon.html#nfc | Non functional change ]]

This commit is the result of modernizing the LLDB codebase by using
`nullptr` instread of `0` or `NULL`. See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nullptr.html
for more information.

This is the command I ran and I to fix and format the code base:

```
run-clang-tidy.py \
	-header-filter='.*' \
	-checks='-*,modernize-use-nullptr' \
	-fix ~/dev/llvm-project/lldb/.* \
	-format \
	-style LLVM \
	-p ~/llvm-builds/debug-ninja-gcc
```

NOTE: There were also changes to `llvm/utils/unittest` but I did not
include them because I felt that maybe this library shall be updated in
isolation somehow.

NOTE: I know this is a rather large commit but it is a nobrainer in most
parts.

Reviewers: martong, espindola, shafik, #lldb, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: arsenm, jvesely, nhaehnle, hiraditya, JDevlieghere, teemperor, rnkovacs, emaste, kubamracek, nemanjai, ki.stfu, javed.absar, arichardson, kbarton, jrtc27, MaskRay, atanasyan, dexonsmith, arphaman, jfb, jsji, jdoerfert, lldb-commits, llvm-commits

Tags: #lldb, #llvm

Differential Revision: https://reviews.llvm.org/D61847

llvm-svn: 361484

1 files changed, 5 insertions, 5 deletions

diff --git a/lldb/source/Core/SourceManager.cpp b/lldb/source/Core/SourceManager.cpp
index 9cd9ac163fb..87065ab6242 100644
--- a/lldb/source/Core/SourceManager.cpp
+++ b/lldb/source/Core/SourceManager.cpp
@@ -326,7 +326,7 @@ bool SourceManager::GetDefaultFileAndLine(FileSpec &file_spec, uint32_t &line) {
         bool inlines_okay = true;
         bool append = false;
         size_t num_matches = executable_ptr->FindFunctions(
-            main_name, NULL, lldb::eFunctionNameTypeBase, inlines_okay,
+            main_name, nullptr, lldb::eFunctionNameTypeBase, inlines_okay,
             symbols_okay, append, sc_list);
         for (size_t idx = 0; idx < num_matches; idx++) {
           SymbolContext sc;
@@ -399,7 +399,7 @@ void SourceManager::File::CommonInitializer(const FileSpec &file_spec,
         if (num_matches != 0) {
           if (num_matches > 1) {
             SymbolContext sc;
-            FileSpec *test_cu_spec = NULL;
+            FileSpec *test_cu_spec = nullptr;
 
             for (unsigned i = 0; i < num_matches; i++) {
               sc_list.GetContextAtIndex(i, sc);
@@ -461,12 +461,12 @@ uint32_t SourceManager::File::GetNumLines() {
 
 const char *SourceManager::File::PeekLineData(uint32_t line) {
   if (!LineIsValid(line))
-    return NULL;
+    return nullptr;
 
   size_t line_offset = GetLineOffset(line);
   if (line_offset < m_data_sp->GetByteSize())
     return (const char *)m_data_sp->GetBytes() + line_offset;
-  return NULL;
+  return nullptr;
 }
 
 uint32_t SourceManager::File::GetLineLength(uint32_t line,
@@ -621,7 +621,7 @@ bool SourceManager::File::CalculateLineOffsets(uint32_t line) {
       return true;
 
     if (m_offsets.empty()) {
-      if (m_data_sp.get() == NULL)
+      if (m_data_sp.get() == nullptr)
         return false;
 
       const char *start = (char *)m_data_sp->GetBytes();