#ifndef LLVM_ADT_STRINGREF_H
#define LLVM_ADT_STRINGREF_H
-#include "llvm/Support/Allocator.h"
#include <algorithm>
#include <cassert>
#include <cstring>
/// The length of the string.
size_t Length;
- // Workaround PR5482: nearly all gcc 4.x miscompile StringRef and std::min()
- // Changing the arg of min to be an integer, instead of a reference to an
- // integer works around this bug.
- static size_t min(size_t a, size_t b) { return a < b ? a : b; }
- static size_t max(size_t a, size_t b) { return a > b ? a : b; }
-
// Workaround memcmp issue with null pointers (undefined behavior)
// by providing a specialized version
static int compareMemory(const char *Lhs, const char *Rhs, size_t Length) {
iterator end() const { return Data + Length; }
+ const unsigned char *bytes_begin() const {
+ return reinterpret_cast<const unsigned char *>(begin());
+ }
+ const unsigned char *bytes_end() const {
+ return reinterpret_cast<const unsigned char *>(end());
+ }
+
/// @}
/// @name String Operations
/// @{
return Data[Length-1];
}
- // copy - Allocate copy in BumpPtrAllocator and return StringRef to it.
- StringRef copy(BumpPtrAllocator &Allocator) {
- char *S = Allocator.Allocate<char>(Length);
+ // copy - Allocate copy in Allocator and return StringRef to it.
+ template <typename Allocator> StringRef copy(Allocator &A) const {
+ char *S = A.template Allocate<char>(Length);
std::copy(begin(), end(), S);
return StringRef(S, Length);
}
/// is lexicographically less than, equal to, or greater than the \p RHS.
int compare(StringRef RHS) const {
// Check the prefix for a mismatch.
- if (int Res = compareMemory(Data, RHS.Data, min(Length, RHS.Length)))
+ if (int Res = compareMemory(Data, RHS.Data, std::min(Length, RHS.Length)))
return Res < 0 ? -1 : 1;
// Otherwise the prefixes match, so we only need to check the lengths.
/// \returns The index of the first occurrence of \p C, or npos if not
/// found.
size_t find(char C, size_t From = 0) const {
- for (size_t i = min(From, Length), e = Length; i != e; ++i)
- if (Data[i] == C)
- return i;
+ size_t FindBegin = std::min(From, Length);
+ if (FindBegin < Length) { // Avoid calling memchr with nullptr.
+ // Just forward to memchr, which is faster than a hand-rolled loop.
+ if (const void *P = ::memchr(Data + FindBegin, C, Length - FindBegin))
+ return static_cast<const char *>(P) - Data;
+ }
return npos;
}
/// \returns The index of the last occurrence of \p C, or npos if not
/// found.
size_t rfind(char C, size_t From = npos) const {
- From = min(From, Length);
+ From = std::min(From, Length);
size_t i = From;
while (i != 0) {
--i;
typename std::enable_if<!std::numeric_limits<T>::is_signed, bool>::type
getAsInteger(unsigned Radix, T &Result) const {
unsigned long long ULLVal;
+ // The additional cast to unsigned long long is required to avoid the
+ // Visual C++ warning C4805: '!=' : unsafe mix of type 'bool' and type
+ // 'unsigned __int64' when instantiating getAsInteger with T = bool.
if (getAsUnsignedInteger(*this, Radix, ULLVal) ||
- static_cast<T>(ULLVal) != ULLVal)
+ static_cast<unsigned long long>(static_cast<T>(ULLVal)) != ULLVal)
return true;
Result = ULLVal;
return false;
/// exceeds the number of characters remaining in the string, the string
/// suffix (starting with \p Start) will be returned.
StringRef substr(size_t Start, size_t N = npos) const {
- Start = min(Start, Length);
- return StringRef(Data + Start, min(N, Length - Start));
+ Start = std::min(Start, Length);
+ return StringRef(Data + Start, std::min(N, Length - Start));
}
/// Return a StringRef equal to 'this' but with the first \p N elements
/// number of characters remaining in the string, the string suffix
/// (starting with \p Start) will be returned.
StringRef slice(size_t Start, size_t End) const {
- Start = min(Start, Length);
- End = min(max(Start, End), Length);
+ Start = std::min(Start, Length);
+ End = std::min(std::max(Start, End), Length);
return StringRef(Data + Start, End - Start);
}