mirror of
https://github.com/Artikash/Textractor.git
synced 2024-12-24 01:14:12 +08:00
130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
#include "extension.h"
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#include "defs.h"
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#include "text.h"
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#include <cwctype>
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#include <fstream>
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#include <atomic>
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#include <filesystem>
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#include <process.h>
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std::atomic<std::filesystem::file_time_type> replaceFileLastWrite;
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struct
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{
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public:
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void Put(std::wstring original, std::wstring replacement)
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{
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if (original.empty()) return;
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Node* current = &root;
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for (auto c : original)
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if (Ignore(c));
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else if (auto& next = current->next[c]) current = next.get();
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else current = (next = std::make_unique<Node>()).get();
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current->value = replacement;
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}
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std::pair<int, std::wstring> Lookup(const std::wstring& text)
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{
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int length = 0;
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Node* current = &root;
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for (auto c : text)
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if (Ignore(c)) ++length;
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else if (auto& next = current->next[c]) ++length, current = next.get();
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else break;
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return { length, current->value };
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}
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private:
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static bool Ignore(wchar_t c)
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{
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return c <= 0x20 || std::iswspace(c);
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}
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struct Node
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{
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std::unordered_map<wchar_t, std::unique_ptr<Node>> next;
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std::wstring value;
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} root;
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} replacementTrie;
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int Parse(const std::wstring& file)
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{
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replacementTrie = {};
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int replacementCount = 0;
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size_t end = 0;
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while (true)
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{
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size_t original = file.find(L"|ORIG|", end);
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size_t becomes = file.find(L"|BECOMES|", original);
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if ((end = file.find(L"|END|", becomes)) == std::wstring::npos) break;
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replacementTrie.Put(file.substr(original + 6, becomes - original - 6), file.substr(becomes + 9, end - becomes - 9));
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++replacementCount;
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}
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return replacementCount;
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}
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bool Replace(std::wstring& sentence)
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{
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for (int i = 0; i < sentence.size(); ++i)
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if (sentence.size() > 10000) return false; // defend against infinite looping
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else if (auto[length, replacement] = replacementTrie.Lookup(sentence.substr(i)); !replacement.empty()) sentence.replace(i, length, replacement);
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return true;
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}
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BOOL WINAPI DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
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{
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static HANDLE replacementFile; // not actually used to read/write, just to ensure it exists
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switch (ul_reason_for_call)
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{
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case DLL_PROCESS_ATTACH:
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{
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replacementFile = CreateFileA(REPLACE_SAVE_FILE, FILE_GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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std::vector<BYTE> file(std::istreambuf_iterator<char>(std::ifstream(REPLACE_SAVE_FILE, std::ios::in | std::ios::binary)), {});
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if (Parse(std::wstring((wchar_t*)file.data(), file.size() / sizeof(wchar_t))) == 0)
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{
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std::ofstream(REPLACE_SAVE_FILE, std::ios::out | std::ios::binary | std::ios::trunc).write((char*)REPLACER_INSTRUCTIONS, wcslen(REPLACER_INSTRUCTIONS) * sizeof(wchar_t));
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_spawnlp(_P_DETACH, "notepad", "notepad", REPLACE_SAVE_FILE, NULL); // show file to user
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}
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replaceFileLastWrite = std::filesystem::last_write_time(REPLACE_SAVE_FILE);
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}
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break;
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case DLL_PROCESS_DETACH:
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{
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CloseHandle(replacementFile);
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}
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break;
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}
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return TRUE;
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}
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bool ProcessSentence(std::wstring& sentence, SentenceInfo)
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{
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static std::shared_mutex m;
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static_assert(std::has_unique_object_representations_v<decltype(replaceFileLastWrite)::value_type>);
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if (!replaceFileLastWrite.compare_exchange_strong(std::filesystem::last_write_time(REPLACE_SAVE_FILE), std::filesystem::last_write_time(REPLACE_SAVE_FILE)))
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{
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std::lock_guard l(m);
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std::vector<BYTE> file(std::istreambuf_iterator<char>(std::ifstream(REPLACE_SAVE_FILE, std::ios::in | std::ios::binary)), {});
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Parse(std::wstring((wchar_t*)file.data(), file.size() / sizeof(wchar_t)));
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}
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std::shared_lock l(m);
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return Replace(sentence);
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}
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TEST(
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{
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assert(Parse(LR"(|ORIG| さよなら|BECOMES|goodbye|END|
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|ORIG|バカ|BECOMES|idiot|END|
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|ORIG|こんにちは |BECOMES|hello|END|)") == 3);
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std::wstring replaced = LR"(hello
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さよなら バカ こんにちは)";
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Replace(replaced);
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assert(replaced.find(L"さよなら") == std::wstring::npos &&
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replaced.find(L"バカ") == std::wstring::npos &&
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replaced.find(L"こんにちは") == std::wstring::npos
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);
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}
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);
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