array.inl

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// # This file is a part of toml++ and is subject to the the terms of the MIT license.
// # Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
// # See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
//  SPDX-License-Identifier: MIT
#pragma once
 
// # {{
#include "preprocessor.hpp"
#if !TOML_IMPLEMENTATION
#error This is an implementation-only header.
#endif
// # }}
 
#include "array.hpp"
#include "header_start.hpp"
 
TOML_NAMESPACE_START {
  TOML_EXTERNAL_LINKAGE
  array::array() noexcept {
#if TOML_LIFETIME_HOOKS
    TOML_ARRAY_CREATED;
#endif
  }
 
  TOML_EXTERNAL_LINKAGE
  array::~array() noexcept {
#if TOML_LIFETIME_HOOKS
    TOML_ARRAY_DESTROYED;
#endif
  }
 
  TOML_EXTERNAL_LINKAGE
  array::array(const impl::array_init_elem* b, const impl::array_init_elem* e) {
#if TOML_LIFETIME_HOOKS
    TOML_ARRAY_CREATED;
#endif
 
    TOML_ASSERT_ASSUME(b);
    TOML_ASSERT_ASSUME(e);
    TOML_ASSERT_ASSUME(b <= e);
 
    if TOML_UNLIKELY (b == e) return;
 
    size_t cap{};
    for (auto it = b; it != e; it++) {
      if (it->value) cap++;
    }
    if TOML_UNLIKELY (!cap) return;
 
    elems_.reserve(cap);
    for (; b != e; b++) {
      if (b->value) elems_.push_back(std::move(b->value));
    }
  }
 
  TOML_EXTERNAL_LINKAGE
  array::array(const array& other)  //
      : node(other) {
    elems_.reserve(other.elems_.size());
    for (const auto& elem : other) elems_.emplace_back(impl::make_node(elem));
 
#if TOML_LIFETIME_HOOKS
    TOML_ARRAY_CREATED;
#endif
  }
 
  TOML_EXTERNAL_LINKAGE
  array::array(array && other) noexcept  //
      : node(std::move(other)), elems_(std::move(other.elems_)) {
#if TOML_LIFETIME_HOOKS
    TOML_ARRAY_CREATED;
#endif
  }
 
  TOML_EXTERNAL_LINKAGE
  array& array::operator=(const array& rhs) {
    if (&rhs != this) {
      node::operator=(rhs);
      elems_.clear();
      elems_.reserve(rhs.elems_.size());
      for (const auto& elem : rhs) elems_.emplace_back(impl::make_node(elem));
    }
    return *this;
  }
 
  TOML_EXTERNAL_LINKAGE
  array& array::operator=(array&& rhs) noexcept {
    if (&rhs != this) {
      node::operator=(std::move(rhs));
      elems_ = std::move(rhs.elems_);
    }
    return *this;
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::preinsertion_resize(size_t idx, size_t count) {
    TOML_ASSERT(idx <= elems_.size());
    TOML_ASSERT_ASSUME(count >= 1u);
    const auto old_size         = elems_.size();
    const auto new_size         = old_size + count;
    const auto inserting_at_end = idx == old_size;
    elems_.resize(new_size);
    if (!inserting_at_end) {
      for (size_t left = old_size, right = new_size - 1u; left-- > idx; right--)
        elems_[right] = std::move(elems_[left]);
    }
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::insert_at_back(impl::node_ptr && elem) {
    TOML_ASSERT(elem);
    elems_.push_back(std::move(elem));
  }
 
  TOML_EXTERNAL_LINKAGE
  array::vector_iterator array::insert_at(const_vector_iterator pos, impl::node_ptr && elem) {
    return elems_.insert(pos, std::move(elem));
  }
 
  TOML_PURE_GETTER
  TOML_EXTERNAL_LINKAGE
  bool array::is_homogeneous(node_type ntype) const noexcept {
    if (elems_.empty()) return false;
 
    if (ntype == node_type::none) ntype = elems_[0]->type();
 
    for (const auto& val : elems_)
      if (val->type() != ntype) return false;
 
    return true;
  }
 
  TOML_PURE_GETTER
  TOML_EXTERNAL_LINKAGE
  bool array::is_homogeneous(node_type ntype, node * &first_nonmatch) noexcept {
    if (elems_.empty()) {
      first_nonmatch = {};
      return false;
    }
    if (ntype == node_type::none) ntype = elems_[0]->type();
    for (const auto& val : elems_) {
      if (val->type() != ntype) {
        first_nonmatch = val.get();
        return false;
      }
    }
    return true;
  }
 
  TOML_PURE_GETTER
  TOML_EXTERNAL_LINKAGE
  bool array::is_homogeneous(node_type ntype, const node*& first_nonmatch) const noexcept {
    node*      fnm    = nullptr;
    const auto result = const_cast<array&>(*this).is_homogeneous(ntype, fnm);
    first_nonmatch    = fnm;
    return result;
  }
 
  TOML_EXTERNAL_LINKAGE
  node& array::at(size_t index) {
#if TOML_COMPILER_HAS_EXCEPTIONS
 
    return *elems_.at(index);
 
#else
 
    auto n = get(index);
    TOML_ASSERT_ASSUME(n && "element index not found in array!");
    return *n;
 
#endif
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::reserve(size_t new_capacity) {
    elems_.reserve(new_capacity);
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::shrink_to_fit() {
    elems_.shrink_to_fit();
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::truncate(size_t new_size) {
    if (new_size < elems_.size()) elems_.resize(new_size);
  }
 
  TOML_EXTERNAL_LINKAGE
  array::iterator array::erase(const_iterator pos) noexcept {
    return iterator{elems_.erase(const_vector_iterator{pos})};
  }
 
  TOML_EXTERNAL_LINKAGE
  array::iterator array::erase(const_iterator first, const_iterator last) noexcept {
    return iterator{elems_.erase(const_vector_iterator{first}, const_vector_iterator{last})};
  }
 
  TOML_EXTERNAL_LINKAGE
  size_t array::total_leaf_count() const noexcept {
    size_t leaves{};
    for (size_t i = 0, e = elems_.size(); i < e; i++) {
      auto arr = elems_[i]->as_array();
      leaves += arr ? arr->total_leaf_count() : size_t{1};
    }
    return leaves;
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::flatten_child(array && child, size_t& dest_index) noexcept {
    for (size_t i = 0, e = child.size(); i < e; i++) {
      auto type = child.elems_[i]->type();
      if (type == node_type::array) {
        array& arr = *reinterpret_cast<array*>(child.elems_[i].get());
        if (!arr.empty()) flatten_child(std::move(arr), dest_index);
      } else
        elems_[dest_index++] = std::move(child.elems_[i]);
    }
  }
 
  TOML_EXTERNAL_LINKAGE
  array& array::flatten() & {
    if (elems_.empty()) return *this;
 
    bool   requires_flattening   = false;
    size_t size_after_flattening = elems_.size();
    for (size_t i = elems_.size(); i-- > 0u;) {
      auto arr = elems_[i]->as_array();
      if (!arr) continue;
      size_after_flattening--;  // discount the array itself
      const auto leaf_count = arr->total_leaf_count();
      if (leaf_count > 0u) {
        requires_flattening = true;
        size_after_flattening += leaf_count;
      } else
        elems_.erase(elems_.cbegin() + static_cast<ptrdiff_t>(i));
    }
 
    if (!requires_flattening) return *this;
 
    elems_.reserve(size_after_flattening);
 
    size_t i = 0;
    while (i < elems_.size()) {
      auto arr = elems_[i]->as_array();
      if (!arr) {
        i++;
        continue;
      }
 
      impl::node_ptr arr_storage = std::move(elems_[i]);
      const auto     leaf_count  = arr->total_leaf_count();
      if (leaf_count > 1u) preinsertion_resize(i + 1u, leaf_count - 1u);
      flatten_child(std::move(*arr), i);  // increments i
    }
 
    return *this;
  }
 
  TOML_EXTERNAL_LINKAGE
  array& array::prune(bool recursive) & noexcept {
    if (elems_.empty()) return *this;
 
    for (size_t i = elems_.size(); i-- > 0u;) {
      if (auto arr = elems_[i]->as_array()) {
        if (recursive) arr->prune(true);
        if (arr->empty()) elems_.erase(elems_.cbegin() + static_cast<ptrdiff_t>(i));
      } else if (auto tbl = elems_[i]->as_table()) {
        if (recursive) tbl->prune(true);
        if (tbl->empty()) elems_.erase(elems_.cbegin() + static_cast<ptrdiff_t>(i));
      }
    }
 
    return *this;
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::pop_back() noexcept {
    elems_.pop_back();
  }
 
  TOML_EXTERNAL_LINKAGE
  void array::clear() noexcept {
    elems_.clear();
  }
 
  TOML_EXTERNAL_LINKAGE
  bool TOML_CALLCONV array::equal(const array& lhs, const array& rhs) noexcept {
    if (&lhs == &rhs) return true;
    if (lhs.elems_.size() != rhs.elems_.size()) return false;
    for (size_t i = 0, e = lhs.elems_.size(); i < e; i++) {
      const auto  lhs_type = lhs.elems_[i]->type();
      const node& rhs_     = *rhs.elems_[i];
      const auto  rhs_type = rhs_.type();
      if (lhs_type != rhs_type) return false;
 
      const bool equal = lhs.elems_[i]->visit([&](const auto& lhs_) noexcept {
        return lhs_ == *reinterpret_cast<std::remove_reference_t<decltype(lhs_)>*>(&rhs_);
      });
      if (!equal) return false;
    }
    return true;
  }
}
TOML_NAMESPACE_END;
 
#include "header_end.hpp"