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#include "tensorflow/core/lib/core/stringpiece.h"
#include <iostream>
#include "tensorflow/core/lib/hash/hash.h"
namespace tensorflow {
size_t StringPiece::Hasher::operator()(StringPiece s) const {
return Hash64(s.data(), s.size());
}
std::ostream& operator<<(std::ostream& o, StringPiece piece) {
o.write(piece.data(), piece.size());
return o;
}
bool StringPiece::contains(StringPiece s) const {
return memmem(data_, size_, s.data_, s.size_) != nullptr;
}
size_t StringPiece::find(char c, size_t pos) const {
if (pos >= size_) {
return npos;
}
const char* result =
reinterpret_cast<const char*>(memchr(data_ + pos, c, size_ - pos));
return result != NULL ? result - data_ : npos;
}
// Search range is [0..pos] inclusive. If pos == npos, search everything.
size_t StringPiece::rfind(char c, size_t pos) const {
if (size_ == 0) return npos;
for (const char* p = data_ + std::min(pos, size_ - 1); p >= data_; p--) {
if (*p == c) {
return p - data_;
}
}
return npos;
}
bool StringPiece::Consume(StringPiece x) {
if (starts_with(x)) {
remove_prefix(x.size_);
return true;
}
return false;
}
StringPiece StringPiece::substr(size_t pos, size_t n) const {
if (pos > size_) pos = size_;
if (n > size_ - pos) n = size_ - pos;
return StringPiece(data_ + pos, n);
}
const StringPiece::size_type StringPiece::npos = size_type(-1);
} // namespace tensorflow
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