LLVM: lib/Support/DJB.cpp Source File (original) (raw)
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19using namespace llvm;
20
23 const UTF8 *const Begin8Const =
24 reinterpret_cast<const UTF8 *>(Buffer.begin());
25 const UTF8 *Begin8 = Begin8Const;
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33 Buffer = Buffer.drop_front(Begin8 - Begin8Const);
34 return C;
35}
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46 (void)CR;
47 return StringRef(reinterpret_cast<char *>(Storage.begin()),
48 Begin8 - Storage.begin());
49}
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54
55 if (C == 0x130 || C == 0x131)
56 return 'i';
58}
59
62 bool AllASCII = true;
63 for (unsigned char C : Buffer) {
64 H = H * 33 + ('A' <= C && C <= 'Z' ? C - 'A' + 'a' : C);
65 AllASCII &= C <= 0x7f;
66 }
67 if (AllASCII)
68 return H;
69 return std::nullopt;
70}
71
74 return *Result;
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76 std::array<UTF8, UNI_MAX_UTF8_BYTES_PER_CODE_POINT> Storage;
77 while (!Buffer.empty()) {
81 }
82 return H;
83}
assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")
static std::optional< uint32_t > fastCaseFoldingDjbHash(StringRef Buffer, uint32_t H)
Definition DJB.cpp:60
static UTF32 foldCharDwarf(UTF32 C)
Definition DJB.cpp:51
static StringRef toUTF8(UTF32 C, MutableArrayRef< UTF8 > Storage)
Definition DJB.cpp:37
static UTF32 chopOneUTF32(StringRef &Buffer)
Definition DJB.cpp:21
MutableArrayRef - Represent a mutable reference to an array (0 or more elements consecutively in memo...
StringRef - Represent a constant reference to a string, i.e.
constexpr bool empty() const
empty - Check if the string is empty.
StringRef drop_front(size_t N=1) const
Return a StringRef equal to 'this' but with the first N elements dropped.
@ C
The default llvm calling convention, compatible with C.
LLVM_ABI int foldCharSimple(int C)
Fold input unicode character according the Simple unicode case folding rules.
This is an optimization pass for GlobalISel generic memory operations.
LLVM_ABI ConversionResult ConvertUTF8toUTF32(const UTF8 **sourceStart, const UTF8 *sourceEnd, UTF32 **targetStart, UTF32 *targetEnd, ConversionFlags flags)
Convert a partial UTF8 sequence to UTF32.
LLVM_ABI uint32_t caseFoldingDjbHash(StringRef Buffer, uint32_t H=5381)
Computes the Bernstein hash after folding the input according to the Dwarf 5 standard case folding ru...
Definition DJB.cpp:72
LLVM_ABI ConversionResult ConvertUTF32toUTF8(const UTF32 **sourceStart, const UTF32 *sourceEnd, UTF8 **targetStart, UTF8 *targetEnd, ConversionFlags flags)
uint32_t djbHash(StringRef Buffer, uint32_t H=5381)
The Bernstein hash function used by the DWARF accelerator tables.