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[clang-scan-deps] Skip UTF-8 BOM in source minimizer 

Differential Revision: https://reviews.llvm.org/D66511

llvm-svn: 369993
This commit is contained in:
Alexandre Ganea 2019-08-27 00:13:52 +00:00
parent a8e8dd91f0
commit e6561e0068
2 changed files with 17 additions and 0 deletions
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7
clang/lib/Lex/DependencyDirectivesSourceMinimizer.cpp
View File

@ -834,7 +834,14 @@ bool Minimizer::lexPPLine(const char *&First, const char *const End) {
return lexDefault(Kind, Id.Name, First, End);
}
static void skipUTF8ByteOrderMark(const char *&First, const char *const End) {
if ((End - First) >= 3 && First[0] == '\xef' && First[1] == '\xbb' &&
First[2] == '\xbf')
First += 3;
}
bool Minimizer::minimizeImpl(const char *First, const char *const End) {
skipUTF8ByteOrderMark(First, End);
while (First != End)
if (lexPPLine(First, End))
return true;

10
clang/test/Lexer/minimize_source_to_dependency_directives_utf8bom.c Normal file
View File

@ -0,0 +1,10 @@
// Test UTF8 BOM at start of file
// RUN: printf '\xef\xbb\xbf' > %t.c
// RUN: echo '#ifdef TEST\n' >> %t.c
// RUN: echo '#include <string>' >> %t.c
// RUN: echo '#endif' >> %t.c
// RUN: %clang_cc1 -DTEST -print-dependency-directives-minimized-source %t.c 2>&1 | FileCheck %s
// CHECK: #ifdef TEST
// CHECK-NEXT: #include <string>
// CHECK-NEXT: #endif