mirror of
https://github.com/danog/ton.git
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340 lines
7.6 KiB
C++
340 lines
7.6 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/Slice-decl.h"
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#include <cstring>
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#include <type_traits>
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namespace td {
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inline MutableSlice::MutableSlice() : s_(const_cast<char *>("")), len_(0) {
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}
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inline MutableSlice::MutableSlice(char *s, size_t len) : s_(s), len_(len) {
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CHECK(s_ != nullptr);
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}
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inline MutableSlice::MutableSlice(unsigned char *s, size_t len) : s_(reinterpret_cast<char *>(s)), len_(len) {
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CHECK(s_ != nullptr);
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}
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inline MutableSlice::MutableSlice(string &s) : s_(&s[0]), len_(s.size()) {
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}
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template <class T>
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MutableSlice::MutableSlice(T s, std::enable_if_t<std::is_same<char *, T>::value, private_tag>) : s_(s) {
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CHECK(s_ != nullptr);
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len_ = std::strlen(s_);
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}
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inline MutableSlice::MutableSlice(char *s, char *t) : MutableSlice(s, t - s) {
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}
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inline MutableSlice::MutableSlice(unsigned char *s, unsigned char *t) : MutableSlice(s, t - s) {
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}
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inline size_t MutableSlice::size() const {
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return len_;
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}
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inline MutableSlice &MutableSlice::remove_prefix(size_t prefix_len) {
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CHECK(prefix_len <= len_);
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s_ += prefix_len;
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len_ -= prefix_len;
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return *this;
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}
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inline MutableSlice &MutableSlice::remove_suffix(size_t suffix_len) {
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CHECK(suffix_len <= len_);
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len_ -= suffix_len;
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return *this;
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}
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inline MutableSlice &MutableSlice::truncate(size_t size) {
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if (len_ > size) {
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len_ = size;
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}
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return *this;
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}
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inline MutableSlice MutableSlice::copy() const {
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return *this;
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}
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inline bool MutableSlice::empty() const {
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return len_ == 0;
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}
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inline char *MutableSlice::data() const {
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return s_;
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}
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inline char *MutableSlice::begin() const {
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return s_;
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}
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inline unsigned char *MutableSlice::ubegin() const {
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return reinterpret_cast<unsigned char *>(s_);
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}
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inline char *MutableSlice::end() const {
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return s_ + len_;
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}
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inline unsigned char *MutableSlice::uend() const {
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return reinterpret_cast<unsigned char *>(s_) + len_;
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}
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inline string MutableSlice::str() const {
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return string(begin(), size());
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}
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inline MutableSlice MutableSlice::substr(size_t from) const {
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CHECK(from <= len_);
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return MutableSlice(s_ + from, len_ - from);
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}
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inline MutableSlice MutableSlice::substr(size_t from, size_t size) const {
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CHECK(from <= len_);
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return MutableSlice(s_ + from, min(size, len_ - from));
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}
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inline size_t MutableSlice::find(char c) const {
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for (size_t pos = 0; pos < len_; pos++) {
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if (s_[pos] == c) {
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return pos;
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}
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}
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return npos;
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}
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inline size_t MutableSlice::rfind(char c) const {
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for (size_t pos = len_; pos-- > 0;) {
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if (s_[pos] == c) {
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return pos;
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}
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}
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return npos;
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}
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inline void MutableSlice::copy_from(Slice from) {
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CHECK(size() >= from.size());
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std::memcpy(ubegin(), from.ubegin(), from.size());
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}
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inline char &MutableSlice::back() {
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CHECK(1 <= len_);
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return s_[len_ - 1];
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}
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inline char &MutableSlice::operator[](size_t i) {
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return s_[i];
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}
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inline Slice::Slice() : s_(""), len_(0) {
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}
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inline Slice::Slice(const MutableSlice &other) : s_(other.begin()), len_(other.size()) {
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}
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inline Slice::Slice(const char *s, size_t len) : s_(s), len_(len) {
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CHECK(s_ != nullptr);
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}
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inline Slice::Slice(const unsigned char *s, size_t len) : s_(reinterpret_cast<const char *>(s)), len_(len) {
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CHECK(s_ != nullptr);
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}
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inline Slice::Slice(const string &s) : s_(s.c_str()), len_(s.size()) {
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}
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template <class T>
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Slice::Slice(T s, std::enable_if_t<std::is_same<char *, std::remove_const_t<T>>::value, private_tag>) : s_(s) {
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CHECK(s_ != nullptr);
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len_ = std::strlen(s_);
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}
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template <class T>
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Slice::Slice(T s, std::enable_if_t<std::is_same<const char *, std::remove_const_t<T>>::value, private_tag>) : s_(s) {
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CHECK(s_ != nullptr);
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len_ = std::strlen(s_);
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}
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inline Slice::Slice(const char *s, const char *t) : s_(s), len_(t - s) {
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CHECK(s_ != nullptr);
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}
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inline Slice::Slice(const unsigned char *s, const unsigned char *t)
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: s_(reinterpret_cast<const char *>(s)), len_(t - s) {
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CHECK(s_ != nullptr);
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}
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inline size_t Slice::size() const {
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return len_;
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}
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inline Slice &Slice::remove_prefix(size_t prefix_len) {
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CHECK(prefix_len <= len_);
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s_ += prefix_len;
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len_ -= prefix_len;
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return *this;
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}
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inline Slice &Slice::remove_suffix(size_t suffix_len) {
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CHECK(suffix_len <= len_);
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len_ -= suffix_len;
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return *this;
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}
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inline Slice &Slice::truncate(size_t size) {
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if (len_ > size) {
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len_ = size;
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}
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return *this;
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}
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inline Slice Slice::copy() const {
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return *this;
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}
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inline bool Slice::empty() const {
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return len_ == 0;
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}
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inline const char *Slice::data() const {
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return s_;
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}
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inline const char *Slice::begin() const {
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return s_;
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}
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inline const unsigned char *Slice::ubegin() const {
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return reinterpret_cast<const unsigned char *>(s_);
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}
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inline const char *Slice::end() const {
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return s_ + len_;
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}
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inline const unsigned char *Slice::uend() const {
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return reinterpret_cast<const unsigned char *>(s_) + len_;
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}
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inline string Slice::str() const {
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return string(begin(), size());
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}
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inline Slice Slice::substr(size_t from) const {
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CHECK(from <= len_);
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return Slice(s_ + from, len_ - from);
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}
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inline Slice Slice::substr(size_t from, size_t size) const {
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CHECK(from <= len_);
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return Slice(s_ + from, min(size, len_ - from));
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}
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inline size_t Slice::find(char c) const {
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for (size_t pos = 0; pos < len_; pos++) {
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if (s_[pos] == c) {
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return pos;
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}
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}
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return npos;
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}
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inline size_t Slice::rfind(char c) const {
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for (size_t pos = len_; pos-- > 0;) {
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if (s_[pos] == c) {
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return pos;
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}
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}
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return npos;
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}
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inline char Slice::back() const {
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CHECK(1 <= len_);
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return s_[len_ - 1];
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}
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inline char Slice::operator[](size_t i) const {
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return s_[i];
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}
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inline bool operator==(const Slice &a, const Slice &b) {
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return a.size() == b.size() && std::memcmp(a.data(), b.data(), a.size()) == 0;
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}
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inline bool operator!=(const Slice &a, const Slice &b) {
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return !(a == b);
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}
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inline bool operator<(const Slice &a, const Slice &b) {
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auto x = std::memcmp(a.data(), b.data(), td::min(a.size(), b.size()));
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if (x == 0) {
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return a.size() < b.size();
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}
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return x < 0;
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}
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inline MutableCSlice::MutableCSlice(char *s, char *t) : MutableSlice(s, t) {
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CHECK(*t == '\0');
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}
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inline CSlice::CSlice(const char *s, const char *t) : Slice(s, t) {
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CHECK(*t == '\0');
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}
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inline std::size_t SliceHash::operator()(Slice slice) const {
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// simple string hash
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std::size_t result = 0;
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constexpr std::size_t MUL = 123456789;
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for (auto c : slice) {
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result = result * MUL + c;
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}
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return result;
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}
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inline Slice as_slice(Slice slice) {
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return slice;
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}
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inline MutableSlice as_slice(MutableSlice slice) {
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return slice;
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}
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inline Slice as_slice(const string &str) {
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return str;
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}
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inline MutableSlice as_slice(string &str) {
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return str;
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}
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inline MutableSlice as_mutable_slice(MutableSlice slice) {
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return slice;
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}
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inline MutableSlice as_mutable_slice(string &str) {
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return str;
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}
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} // namespace td
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