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1 | | -//===- OptionStrCmp.cpp - Option String Comparison --------------*- C++ -*-===// |
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 "llvm/Support/OptionStrCmp.h" |
10 | | -#include "llvm/ADT/STLExtras.h" |
11 | | - |
12 | | -using namespace llvm; |
13 | | - |
14 | | -// Comparison function for Option strings (option names & prefixes). |
15 | | -// The ordering is *almost* case-insensitive lexicographic, with an exception. |
16 | | -// '\0' comes at the end of the alphabet instead of the beginning (thus options |
17 | | -// precede any other options which prefix them). Additionally, if two options |
18 | | -// are identical ignoring case, they are ordered according to case sensitive |
19 | | -// ordering if `FallbackCaseSensitive` is true. |
20 | | -int llvm::StrCmpOptionName(StringRef A, StringRef B, |
21 | | - bool FallbackCaseSensitive) { |
22 | | - size_t MinSize = std::min(A.size(), B.size()); |
23 | | - if (int Res = A.substr(0, MinSize).compare_insensitive(B.substr(0, MinSize))) |
24 | | - return Res; |
25 | | - |
26 | | - // If they are identical ignoring case, use case sensitive ordering. |
27 | | - if (A.size() == B.size()) |
28 | | - return FallbackCaseSensitive ? A.compare(B) : 0; |
29 | | - |
30 | | - return (A.size() == MinSize) ? 1 /* A is a prefix of B. */ |
31 | | - : -1 /* B is a prefix of A */; |
32 | | -} |
33 | | - |
34 | | -// Comparison function for Option prefixes. |
35 | | -int llvm::StrCmpOptionPrefixes(ArrayRef<StringRef> APrefixes, |
36 | | - ArrayRef<StringRef> BPrefixes) { |
37 | | - for (const auto &[APre, BPre] : zip(APrefixes, BPrefixes)) { |
38 | | - if (int Cmp = StrCmpOptionName(APre, BPre)) |
39 | | - return Cmp; |
40 | | - } |
41 | | - // Both prefixes are identical. |
42 | | - return 0; |
43 | | -} |
| 1 | +//===- OptionStrCmp.cpp - Option String Comparison --------------*- C++ -*-===// |
| 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 "llvm/Support/OptionStrCmp.h" |
| 10 | +#include "llvm/ADT/STLExtras.h" |
| 11 | + |
| 12 | +using namespace llvm; |
| 13 | + |
| 14 | +// Comparison function for Option strings (option names & prefixes). |
| 15 | +// The ordering is *almost* case-insensitive lexicographic, with an exception. |
| 16 | +// '\0' comes at the end of the alphabet instead of the beginning (thus options |
| 17 | +// precede any other options which prefix them). Additionally, if two options |
| 18 | +// are identical ignoring case, they are ordered according to case sensitive |
| 19 | +// ordering if `FallbackCaseSensitive` is true. |
| 20 | +int llvm::StrCmpOptionName(StringRef A, StringRef B, |
| 21 | + bool FallbackCaseSensitive) { |
| 22 | + size_t MinSize = std::min(A.size(), B.size()); |
| 23 | + if (int Res = A.substr(0, MinSize).compare_insensitive(B.substr(0, MinSize))) |
| 24 | + return Res; |
| 25 | + |
| 26 | + // If they are identical ignoring case, use case sensitive ordering. |
| 27 | + if (A.size() == B.size()) |
| 28 | + return FallbackCaseSensitive ? A.compare(B) : 0; |
| 29 | + |
| 30 | + return (A.size() == MinSize) ? 1 /* A is a prefix of B. */ |
| 31 | + : -1 /* B is a prefix of A */; |
| 32 | +} |
| 33 | + |
| 34 | +// Comparison function for Option prefixes. |
| 35 | +int llvm::StrCmpOptionPrefixes(ArrayRef<StringRef> APrefixes, |
| 36 | + ArrayRef<StringRef> BPrefixes) { |
| 37 | + for (const auto &[APre, BPre] : zip(APrefixes, BPrefixes)) { |
| 38 | + if (int Cmp = StrCmpOptionName(APre, BPre)) |
| 39 | + return Cmp; |
| 40 | + } |
| 41 | + // Both prefixes are identical. |
| 42 | + return 0; |
| 43 | +} |
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