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310 lines (259 loc) · 9.37 KB
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/*
* simplecpp - A simple and high-fidelity C/C++ preprocessor library
* Copyright (C) 2016 Daniel Marjamäki.
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef simplecppH
#define simplecppH
#include <cctype>
#include <cstddef>
#include <istream>
#include <list>
#include <map>
#include <set>
#include <string>
#include <vector>
#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
namespace simplecpp {
typedef std::string TokenString;
/**
* Location in source code
*/
class SIMPLECPP_LIB Location {
public:
explicit Location(const std::vector<std::string> &f) : files(f), fileIndex(0), line(1U), col(0U) {}
Location(const Location &loc) : files(loc.files), fileIndex(loc.fileIndex), line(loc.line), col(loc.col) {}
Location &operator=(const Location &other) {
if (this != &other) {
fileIndex = other.fileIndex;
line = other.line;
col = other.col;
}
return *this;
}
/** 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;
}
const std::string& file() const {
return fileIndex < files.size() ? files[fileIndex] : emptyFileName;
}
const std::vector<std::string> &files;
unsigned int fileIndex;
unsigned int line;
unsigned int col;
private:
const std::string emptyFileName;
};
/**
* token class.
* @todo don't use std::string representation - for both memory and performance reasons
*/
class SIMPLECPP_LIB Token {
public:
Token(const TokenString &s, const Location &loc) :
str(string), location(loc), previous(NULL), next(NULL), string(s) {
flags();
}
Token(const Token &tok) :
str(string), macro(tok.macro), location(tok.location), previous(NULL), next(NULL), string(tok.str) {
flags();
}
void flags() {
name = (std::isalpha((unsigned char)str[0]) || str[0] == '_' || str[0] == '$');
comment = (str.compare(0, 2, "//") == 0 || str.compare(0, 2, "/*") == 0);
number = std::isdigit((unsigned char)str[0]) || (str.size() > 1U && str[0] == '-' && std::isdigit((unsigned char)str[1]));
op = (str.size() == 1U) ? str[0] : '\0';
}
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;
const TokenString &str;
TokenString macro;
char op;
bool comment;
bool name;
bool number;
Location location;
Token *previous;
Token *next;
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 printAll() const;
void printOut() const;
private:
TokenString string;
// Not implemented - prevent assignment
Token &operator=(const Token &tok);
};
/** Output from preprocessor */
struct SIMPLECPP_LIB Output {
explicit Output(const std::vector<std::string> &files) : type(ERROR), location(files) {}
enum Type {
ERROR, /* #error */
WARNING, /* #warning */
MISSING_HEADER,
INCLUDE_NESTED_TOO_DEEPLY,
SYNTAX_ERROR,
PORTABILITY_BACKSLASH,
UNHANDLED_CHAR_ERROR
} type;
Location location;
std::string msg;
};
typedef std::list<Output> OutputList;
/** List of tokens. */
class SIMPLECPP_LIB TokenList {
public:
explicit TokenList(std::vector<std::string> &filenames);
TokenList(std::istream &istr, std::vector<std::string> &filenames, const std::string &filename=std::string(), OutputList *outputList = 0);
TokenList(const TokenList &other);
~TokenList();
TokenList &operator=(const TokenList &other);
void clear();
bool empty() const {
return !frontToken;
}
void push_back(Token *tok);
void dump() const;
std::string stringify() const;
void readfile(std::istream &istr, const std::string &filename=std::string(), OutputList *outputList = 0);
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) {
if (!tok)
return;
Token *prev = tok->previous;
Token *next = tok->next;
if (prev)
prev->next = next;
if (next)
next->previous = prev;
if (frontToken == tok)
frontToken = next;
if (backToken == tok)
backToken = prev;
delete tok;
}
void takeTokens(TokenList &other) {
if (!other.frontToken)
return;
if (!frontToken) {
frontToken = other.frontToken;
} else {
backToken->next = other.frontToken;
other.frontToken->previous = backToken;
}
backToken = other.backToken;
other.frontToken = other.backToken = NULL;
}
/** sizeof(T) */
std::map<std::string, std::size_t> sizeOfType;
private:
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(std::istream &istr, const Location &location, const char start, const char end, OutputList *outputList);
std::string lastLine(int maxsize=10) 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(const std::vector<std::string> &f) : macroLocation(f), useLocation(f) {}
std::string macroName;
Location macroLocation;
Location useLocation;
};
struct SIMPLECPP_LIB DUI {
DUI() {}
std::list<std::string> defines;
std::set<std::string> undefined;
std::list<std::string> includePaths;
std::list<std::string> includes;
};
SIMPLECPP_LIB std::map<std::string, TokenList*> load(const TokenList &rawtokens, std::vector<std::string> &filenames, const DUI &dui, OutputList *outputList = 0);
/**
* Preprocess
* @todo simplify interface
* @param output TokenList that receives the preprocessing output
* @param rawtokens Raw tokenlist for top sourcefile
* @param files internal data of simplecpp
* @param filedata output from simplecpp::load()
* @param dui defines, undefs, and include paths
* @param outputList output: list that will receive output messages
* @param macroUsage output: macro usage
*/
SIMPLECPP_LIB void preprocess(TokenList &output, const TokenList &rawtokens, std::vector<std::string> &files, std::map<std::string, TokenList*> &filedata, const DUI &dui, OutputList *outputList = 0, std::list<MacroUsage> *macroUsage = 0);
/**
* Deallocate data
*/
SIMPLECPP_LIB void cleanup(std::map<std::string, TokenList*> &filedata);
/** Simplify path */
SIMPLECPP_LIB std::string simplifyPath(std::string path);
}
#endif