#ifndef simplecppH

#define simplecppH

#include <cctype>

#include <cstdint>

#include <cstring>

#include <iosfwd>

#include <list>

#include <map>

#include <memory>

#include <set>

#include <string>

#include <unordered_map>

#include <utility>

#include <vector>

#if __cplusplus >= 202002L

# include <version>

#endif

#if defined(__cpp_lib_string_view) && !defined(__cpp_lib_span)

#include <string_view>

#endif

#ifdef __cpp_lib_span

#include <span>

#endif

#ifdef _WIN32

# ifdef SIMPLECPP_EXPORT

# define SIMPLECPP_LIB __declspec(dllexport)

# elif defined(SIMPLECPP_IMPORT)

# define SIMPLECPP_LIB __declspec(dllimport)

# else

# define SIMPLECPP_LIB

# endif

#else

# define SIMPLECPP_LIB

#endif

#ifndef _WIN32

# include <sys/types.h>

#endif

#if defined(_MSC_VER)

# pragma warning(push)

# pragma warning(disable : 4267)

# pragma warning(disable : 4244)

#endif

#ifndef SIMPLECPP_TOKENLIST_ALLOW_PTR

# if !defined(__cpp_lib_string_view) && !defined(__cpp_lib_span)

# define SIMPLECPP_TOKENLIST_ALLOW_PTR 1

# else

# define SIMPLECPP_TOKENLIST_ALLOW_PTR 0

# endif

#endif

namespace simplecpp {

/** C code standard */

enum cstd_t : std::int8_t { CUnknown=-1, C89, C99, C11, C17, C23, C2Y };

/** C++ code standard */

enum cppstd_t : std::int8_t { CPPUnknown=-1, CPP03, CPP11, CPP14, CPP17, CPP20, CPP23, CPP26 };

using TokenString = std::string;

#if defined(__cpp_lib_string_view) && !defined(__cpp_lib_span)

using View = std::string_view;

#else

struct View

};

#endif // defined(__cpp_lib_string_view) && !defined(__cpp_lib_span)

class Macro;

/**

struct SIMPLECPP_LIB Location {

Location() = default;

Location(unsigned int fileIndex, unsigned int line, unsigned int col)

{}

Location(const Location &loc) = default;

Location &operator=(const Location &other) = default;

/** increment this location by string */

void adjust(const std::string &str);

bool operator<(const Location &rhs) const {

if (fileIndex != rhs.fileIndex)

return fileIndex < rhs.fileIndex;

if (line != rhs.line)

return line < rhs.line;

return col < rhs.col;

}

bool sameline(const Location &other) const {

return fileIndex == other.fileIndex && line == other.line;

}

unsigned int fileIndex{};

unsigned int line{};

unsigned int col{};

};

/**

class SIMPLECPP_LIB Token {

public:

Token(const TokenString &s, const Location &loc, bool wsahead = false) :

whitespaceahead(wsahead), location(loc), string(s) {

flags();

}

Token(const Token &tok) :

macro(tok.macro), op(tok.op), comment(tok.comment), name(tok.name), number(tok.number), whitespaceahead(tok.whitespaceahead), location(tok.location), string(tok.string), mExpandedFrom(tok.mExpandedFrom) {}

Token &operator=(const Token &tok) = delete;

const TokenString& str() const {

return string;

}

void setstr(const std::string &s) {

string = s;

flags();

}

bool isOneOf(const char ops[]) const;

bool startsWithOneOf(const char c[]) const;

bool endsWithOneOf(const char c[]) const;

static bool isNumberLike(const std::string& str) {

return std::isdigit(static_cast<unsigned char>(str[0])) ||

(str.size() > 1U && (str[0] == '-' || str[0] == '+') && std::isdigit(static_cast<unsigned char>(str[1])));

}

TokenString macro;

char op;

bool comment;

bool name;

bool number;

bool whitespaceahead;

Location location;

Token *previous{};

Token *next{};

mutable const Token *nextcond{};

const Token *previousSkipComments() const {

const Token *tok = this->previous;

while (tok && tok->comment)

tok = tok->previous;

return tok;

}

const Token *nextSkipComments() const {

const Token *tok = this->next;

while (tok && tok->comment)

tok = tok->next;

return tok;

}

void setExpandedFrom(const Token *tok, const Macro* m) {

}

bool isExpandedFrom(const Macro* m) const {

return mExpandedFrom.find(m) != mExpandedFrom.end();

}

void printAll() const;

void printOut() const;

private:

void flags() {

name = (std::isalpha(static_cast<unsigned char>(string[0])) || string[0] == '_' || string[0] == '$')

&& (std::memchr(string.c_str(), '\'', string.size()) == nullptr);

comment = string.size() > 1U && string[0] == '/' && (string[1] == '/' || string[1] == '*');

number = isNumberLike(string);

op = (string.size() == 1U && !name && !comment && !number) ? string[0] : '\0';

}

TokenString string;

std::set<const Macro*> mExpandedFrom;

};

/** Output from preprocessor */

struct SIMPLECPP_LIB Output {

enum Type : std::uint8_t {

} type;

Output(Type type, const Location& loc, std::string msg) : type(type), location(loc), msg(std::move(msg)) {}

Location location;

std::string msg;

};

using OutputList = std::list<Output>;

/** List of tokens. */

class SIMPLECPP_LIB TokenList {

public:

class Stream;

explicit TokenList(std::vector<std::string> &filenames);

/** generates a token list from the given std::istream parameter */

TokenList(std::istream &istr, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr);

/** generates a token list from the given buffer */

template<size_t size>

TokenList(const char (&data)[size], std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(reinterpret_cast<const unsigned char*>(data), size-1, filenames, filename, outputList, 0)

{}

/** generates a token list from the given buffer */

template<size_t size>

TokenList(const unsigned char (&data)[size], std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(data, size-1, filenames, filename, outputList, 0)

{}

#if SIMPLECPP_TOKENLIST_ALLOW_PTR

/** generates a token list from the given buffer */

TokenList(const unsigned char* data, std::size_t size, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(data, size, filenames, filename, outputList, 0)

{}

/** generates a token list from the given buffer */

TokenList(const char* data, std::size_t size, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(reinterpret_cast<const unsigned char*>(data), size, filenames, filename, outputList, 0)

{}

#endif // SIMPLECPP_TOKENLIST_ALLOW_PTR

/** generates a token list from the given buffer */

TokenList(View data, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(reinterpret_cast<const unsigned char*>(data.data()), data.size(), filenames, filename, outputList, 0)

{}

#ifdef __cpp_lib_span

/** generates a token list from the given buffer */

TokenList(std::span<const char> data, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(reinterpret_cast<const unsigned char*>(data.data()), data.size(), filenames, filename, outputList, 0)

{}

/** generates a token list from the given buffer */

TokenList(std::span<const unsigned char> data, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = nullptr)

: TokenList(data.data(), data.size(), filenames, filename, outputList, 0)

{}

#endif // __cpp_lib_span

/** generates a token list from the given filename parameter */

TokenList(const std::string &filename, std::vector<std::string> &filenames, OutputList *outputList = nullptr);

TokenList(const TokenList &other);

TokenList(TokenList &&other);

~TokenList();

TokenList &operator=(const TokenList &other);

TokenList &operator=(TokenList &&other);

void clear();

bool empty() const {

return !frontToken;

}

void push_back(Token *tok);

void dump(bool linenrs = false) const;

std::string stringify(bool linenrs = false) const;

void readfile(Stream &stream, const std::string &filename=std::string(), OutputList *outputList = nullptr);

/**

void constFold();

void removeComments();

Token *front() {

return frontToken;

}

const Token *cfront() const {

return frontToken;

}

Token *back() {

return backToken;

}

const Token *cback() const {

return backToken;

}

void deleteToken(Token *tok) {

}

void takeTokens(TokenList &other) {

}

/** sizeof(T) */

std::map<std::string, std::size_t> sizeOfType;

const std::vector<std::string>& getFiles() const {

return files;

}

const std::string& file(const Location& loc) const;

private:

TokenList(const unsigned char* data, std::size_t size, std::vector<std::string> &filenames, const std::string &filename, OutputList *outputList, int unused);

void combineOperators();

void constFoldUnaryNotPosNeg(Token *tok);

/**

void constFoldMulDivRem(Token *tok);

void constFoldAddSub(Token *tok);

void constFoldShift(Token *tok);

void constFoldComparison(Token *tok);

void constFoldBitwise(Token *tok);

void constFoldLogicalOp(Token *tok);

/**

void constFoldQuestionOp(Token *&tok1);

std::string readUntil(Stream &stream, const Location &location, char start, char end, OutputList *outputList);

void lineDirective(unsigned int fileIndex, unsigned int line, Location &location);

const Token* lastLineTok(int maxsize=1000) const;

const Token* isLastLinePreprocessor(int maxsize=1000) const;

unsigned int fileIndex(const std::string &filename);

Token *frontToken;

Token *backToken;

std::vector<std::string> &files;

};

/** Tracking how macros are used */

struct SIMPLECPP_LIB MacroUsage {

explicit MacroUsage(bool macroValueKnown_) : macroValueKnown(macroValueKnown_) {}

std::string macroName;

Location macroLocation;

Location useLocation;

bool macroValueKnown;

};

/** Tracking #if/#elif expressions */

struct SIMPLECPP_LIB IfCond {

explicit IfCond(const Location& location, const std::string &E, long long result) : location(location), E(E), result(result) {}

Location location; // location of #if/#elif

std::string E; // preprocessed condition

long long result; // condition result

};

/**

struct SIMPLECPP_LIB DUI {

DUI() = default;

std::list<std::string> defines;

std::set<std::string> undefined;

std::list<std::string> includePaths;

std::list<std::string> includes;

std::string std;

bool clearIncludeCache{};

bool removeComments{}; /** remove comment tokens from included files */

};

struct SIMPLECPP_LIB FileData {

/** The canonical filename associated with this data */

std::string filename;

/** The tokens associated with this file */

TokenList tokens;

};

class SIMPLECPP_LIB FileDataCache {

public:

FileDataCache() = default;

FileDataCache(const FileDataCache &) = delete;

FileDataCache(FileDataCache &&) = default;

FileDataCache &operator=(const FileDataCache &) = delete;

FileDataCache &operator=(FileDataCache &&) = default;

/** Get the cached data for a file, or load and then return it if it isn't cached.

std::pair<FileData *, bool> get(const std::string &sourcefile, const std::string &header, const DUI &dui, bool systemheader, std::vector<std::string> &filenames, OutputList *outputList);

void insert(FileData data) {

}

void clear() {

}

using container_type = std::vector<std::unique_ptr<FileData>>;

using iterator = container_type::iterator;

using const_iterator = container_type::const_iterator;

using size_type = container_type::size_type;

size_type size() const {

return mData.size();

}

iterator begin() {

return mData.begin();

}

iterator end() {

return mData.end();

}

const_iterator begin() const {

return mData.begin();

}

const_iterator end() const {

return mData.end();

}

const_iterator cbegin() const {

return mData.cbegin();

}

const_iterator cend() const {

return mData.cend();

}

private:

struct FileID {

};

using name_map_type = std::unordered_map<std::string, FileData *>;

using id_map_type = std::unordered_map<FileID, FileData *, FileID::Hasher>;

static bool getFileId(const std::string &path, FileID &id);

std::pair<FileData *, bool> tryload(name_map_type::iterator &name_it, const DUI &dui, std::vector<std::string> &filenames, OutputList *outputList);

container_type mData;

name_map_type mNameMap;

id_map_type mIdMap;

};

/** Converts character literal (including prefix, but not ud-suffix) to long long value.

SIMPLECPP_LIB long long characterLiteralToLL(const std::string& str);

SIMPLECPP_LIB FileDataCache load(const TokenList &rawtokens, std::vector<std::string> &filenames, const DUI &dui, OutputList *outputList = nullptr, FileDataCache cache = {});

/**

SIMPLECPP_LIB void preprocess(TokenList &output, const TokenList &rawtokens, std::vector<std::string> &files, FileDataCache &cache, const DUI &dui, OutputList *outputList = nullptr, std::list<MacroUsage> *macroUsage = nullptr, std::list<IfCond> *ifCond = nullptr);

/**

SIMPLECPP_LIB void cleanup(FileDataCache &cache);

/** Simplify path */

SIMPLECPP_LIB std::string simplifyPath(std::string path);

/** Convert Cygwin path to Windows path */

SIMPLECPP_LIB std::string convertCygwinToWindowsPath(const std::string &cygwinPath);

/** Returns the C version a given standard */

SIMPLECPP_LIB cstd_t getCStd(const std::string &std);

/** Returns the C++ version a given standard */

SIMPLECPP_LIB cppstd_t getCppStd(const std::string &std);

/** Returns the __STDC_VERSION__ value for a given standard */

SIMPLECPP_LIB std::string getCStdString(const std::string &std);

SIMPLECPP_LIB std::string getCStdString(cstd_t std);

/** Returns the __cplusplus value for a given standard */

SIMPLECPP_LIB std::string getCppStdString(const std::string &std);

SIMPLECPP_LIB std::string getCppStdString(cppstd_t std);

/** Checks if given path is absolute */

SIMPLECPP_LIB bool isAbsolutePath(const std::string &path);

}

#undef SIMPLECPP_TOKENLIST_ALLOW_PTR

#if defined(_MSC_VER)

# pragma warning(pop)

#endif

#undef SIMPLECPP_LIB

#endif