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cppcheck/externals/simplecpp/simplecpp.cpp

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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/>.
*/
#include "simplecpp.h"
#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <limits>
#include <list>
#include <map>
#include <set>
#include <stdexcept>
#include <vector>
#include <cstring>
#include <cstdlib> // strtoll, etc
#include <sstream>
#include <fstream>
#include <iostream>
#include <stack>
#include <string>
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
#include <windows.h>
#undef min
#undef max
#undef ERROR
#undef TRUE
#define SIMPLECPP_WINDOWS
#endif
namespace {
const simplecpp::TokenString DEFINE("define");
const simplecpp::TokenString UNDEF("undef");
const simplecpp::TokenString INCLUDE("include");
const simplecpp::TokenString ERROR("error");
const simplecpp::TokenString WARNING("warning");
const simplecpp::TokenString IF("if");
const simplecpp::TokenString IFDEF("ifdef");
const simplecpp::TokenString IFNDEF("ifndef");
const simplecpp::TokenString DEFINED("defined");
const simplecpp::TokenString ELSE("else");
const simplecpp::TokenString ELIF("elif");
const simplecpp::TokenString ENDIF("endif");
const simplecpp::TokenString PRAGMA("pragma");
const simplecpp::TokenString ONCE("once");
template<class T> std::string toString(T t) {
std::ostringstream ostr;
ostr << t;
return ostr.str();
}
long long stringToLL(const std::string &s)
{
long long ret;
bool hex = (s.compare(0, 2, "0x") == 0);
std::istringstream istr(hex ? s.substr(2) : s);
if (hex)
istr >> std::hex;
istr >> ret;
return ret;
}
unsigned long long stringToULL(const std::string &s)
{
unsigned long long ret;
bool hex = (s.compare(0, 2, "0x") == 0);
std::istringstream istr(hex ? s.substr(2) : s);
if (hex)
istr >> std::hex;
istr >> ret;
return ret;
}
bool startsWith(const std::string &str, const std::string &s) {
return (str.size() >= s.size() && str.compare(0, s.size(), s) == 0);
}
bool endsWith(const std::string &s, const std::string &e) {
return (s.size() >= e.size() && s.compare(s.size() - e.size(), e.size(), e) == 0);
}
bool sameline(const simplecpp::Token *tok1, const simplecpp::Token *tok2) {
return tok1 && tok2 && tok1->location.sameline(tok2->location);
}
static bool isAlternativeBinaryOp(const simplecpp::Token *tok, const std::string &alt) {
return (tok->name &&
tok->str == alt &&
tok->previous &&
tok->next &&
(tok->previous->number || tok->previous->name || tok->previous->op == ')') &&
(tok->next->number || tok->next->name || tok->next->op == '('));
}
static bool isAlternativeUnaryOp(const simplecpp::Token *tok, const std::string &alt) {
return ((tok->name && tok->str == alt) &&
(!tok->previous || tok->previous->op == '(') &&
(tok->next && (tok->next->name || tok->next->number)));
}
}
void simplecpp::Location::adjust(const std::string &str) {
if (str.find_first_of("\r\n") == std::string::npos) {
col += str.size();
return;
}
for (std::size_t i = 0U; i < str.size(); ++i) {
col++;
if (str[i] == '\n' || str[i] == '\r') {
col = 0;
line++;
if (str[i] == '\r' && (i+1)<str.size() && str[i+1]=='\n')
++i;
}
}
}
bool simplecpp::Token::isOneOf(const char ops[]) const {
return (op != '\0') && (std::strchr(ops, op) != 0);
}
bool simplecpp::Token::startsWithOneOf(const char c[]) const {
return std::strchr(c, str[0]) != 0;
}
bool simplecpp::Token::endsWithOneOf(const char c[]) const {
return std::strchr(c, str[str.size() - 1U]) != 0;
}
void simplecpp::Token::printAll() const {
const Token *tok = this;
while (tok->previous)
tok = tok->previous;
for (const Token *tok = this; tok; tok = tok->next) {
if (tok->previous) {
std::cout << (sameline(tok, tok->previous) ? ' ' : '\n');
}
std::cout << tok->str;
}
std::cout << std::endl;
}
void simplecpp::Token::printOut() const {
for (const Token *tok = this; tok; tok = tok->next) {
if (tok != this) {
std::cout << (sameline(tok, tok->previous) ? ' ' : '\n');
}
std::cout << tok->str;
}
std::cout << std::endl;
}
simplecpp::TokenList::TokenList(std::vector<std::string> &filenames) : frontToken(NULL), backToken(NULL), files(filenames) {}
simplecpp::TokenList::TokenList(std::istream &istr, std::vector<std::string> &filenames, const std::string &filename, OutputList *outputList)
: frontToken(NULL), backToken(NULL), files(filenames) {
readfile(istr,filename,outputList);
}
simplecpp::TokenList::TokenList(const TokenList &other) : frontToken(NULL), backToken(NULL), files(other.files) {
*this = other;
}
simplecpp::TokenList::~TokenList() {
clear();
}
void simplecpp::TokenList::operator=(const TokenList &other) {
if (this == &other)
return;
clear();
for (const Token *tok = other.cfront(); tok; tok = tok->next)
push_back(new Token(*tok));
sizeOfType = other.sizeOfType;
}
void simplecpp::TokenList::clear() {
backToken = NULL;
while (frontToken) {
Token *next = frontToken->next;
delete frontToken;
frontToken = next;
}
sizeOfType.clear();
}
void simplecpp::TokenList::push_back(Token *tok) {
if (!frontToken)
frontToken = tok;
else
backToken->next = tok;
tok->previous = backToken;
backToken = tok;
}
void simplecpp::TokenList::dump() const {
std::cout << stringify() << std::endl;
}
std::string simplecpp::TokenList::stringify() const {
std::ostringstream ret;
Location loc(files);
for (const Token *tok = cfront(); tok; tok = tok->next) {
if (tok->location.line < loc.line || tok->location.fileIndex != loc.fileIndex) {
ret << "\n#line " << tok->location.line << " \"" << tok->location.file() << "\"\n";
loc = tok->location;
}
while (tok->location.line > loc.line) {
ret << '\n';
loc.line++;
}
if (sameline(tok->previous, tok))
ret << ' ';
ret << tok->str;
loc.adjust(tok->str);
}
return ret.str();
}
static unsigned char readChar(std::istream &istr, unsigned int bom)
{
unsigned char ch = (unsigned char)istr.get();
// For UTF-16 encoded files the BOM is 0xfeff/0xfffe. If the
// character is non-ASCII character then replace it with 0xff
if (bom == 0xfeff || bom == 0xfffe) {
const unsigned char ch2 = (unsigned char)istr.get();
const int ch16 = (bom == 0xfeff) ? (ch<<8 | ch2) : (ch2<<8 | ch);
ch = (unsigned char)((ch16 >= 0x80) ? 0xff : ch16);
}
// Handling of newlines..
if (ch == '\r') {
ch = '\n';
if (bom == 0 && (char)istr.peek() == '\n')
(void)istr.get();
else if (bom == 0xfeff || bom == 0xfffe) {
int c1 = istr.get();
int c2 = istr.get();
int ch16 = (bom == 0xfeff) ? (c1<<8 | c2) : (c2<<8 | c1);
if (ch16 != '\n') {
istr.unget();
istr.unget();
}
}
}
return ch;
}
static unsigned char peekChar(std::istream &istr, unsigned int bom) {
unsigned char ch = (unsigned char)istr.peek();
// For UTF-16 encoded files the BOM is 0xfeff/0xfffe. If the
// character is non-ASCII character then replace it with 0xff
if (bom == 0xfeff || bom == 0xfffe) {
(void)istr.get();
const unsigned char ch2 = (unsigned char)istr.peek();
istr.unget();
const int ch16 = (bom == 0xfeff) ? (ch<<8 | ch2) : (ch2<<8 | ch);
ch = (unsigned char)((ch16 >= 0x80) ? 0xff : ch16);
}
// Handling of newlines..
if (ch == '\r')
ch = '\n';
return ch;
}
static void ungetChar(std::istream &istr, unsigned int bom) {
istr.unget();
if (bom == 0xfeff || bom == 0xfffe)
istr.unget();
}
static unsigned short getAndSkipBOM(std::istream &istr) {
const unsigned char ch1 = istr.peek();
// The UTF-16 BOM is 0xfffe or 0xfeff.
if (ch1 >= 0xfe) {
unsigned short bom = ((unsigned char)istr.get() << 8);
if (istr.peek() >= 0xfe)
return bom | (unsigned char)istr.get();
return 0;
}
// Skip UTF-8 BOM 0xefbbbf
if (ch1 == 0xef) {
istr.get();
if (istr.get() == 0xbb && istr.peek() == 0xbf) {
(void)istr.get();
} else {
istr.unget();
istr.unget();
}
}
return 0;
}
bool isNameChar(unsigned char ch) {
return std::isalnum(ch) || ch == '_' || ch == '$';
}
static std::string escapeString(const std::string &str) {
std::ostringstream ostr;
ostr << '\"';
for (std::size_t i = 1U; i < str.size() - 1; ++i) {
char c = str[i];
if (c == '\\' || c == '\"' || c == '\'')
ostr << '\\';
ostr << c;
}
ostr << '\"';
return ostr.str();
}
static void portabilityBackslash(simplecpp::OutputList *outputList, const std::vector<std::string> &files, const simplecpp::Location &location) {
if (!outputList)
return;
simplecpp::Output err(files);
err.type = simplecpp::Output::PORTABILITY_BACKSLASH;
err.location = location;
err.msg = "Combination 'backslash space newline' is not portable.";
outputList->push_back(err);
}
void simplecpp::TokenList::readfile(std::istream &istr, const std::string &filename, OutputList *outputList)
{
std::stack<simplecpp::Location> loc;
unsigned int multiline = 0U;
const Token *oldLastToken = NULL;
const unsigned short bom = getAndSkipBOM(istr);
Location location(files);
location.fileIndex = fileIndex(filename);
location.line = 1U;
location.col = 1U;
while (istr.good()) {
unsigned char ch = readChar(istr,bom);
if (!istr.good())
break;
if (ch == '\n') {
if (cback() && cback()->op == '\\') {
if (location.col > cback()->location.col + 1U)
portabilityBackslash(outputList, files, cback()->location);
++multiline;
deleteToken(back());
} else {
location.line += multiline + 1;
multiline = 0U;
}
if (!multiline)
location.col = 1;
if (oldLastToken != cback()) {
oldLastToken = cback();
const std::string lastline(lastLine());
if (lastline == "# file %str%") {
loc.push(location);
location.fileIndex = fileIndex(cback()->str.substr(1U, cback()->str.size() - 2U));
location.line = 1U;
} else if (lastline == "# line %num%") {
loc.push(location);
location.line = std::atol(cback()->str.c_str());
} else if (lastline == "# line %num% %str%") {
loc.push(location);
location.fileIndex = fileIndex(cback()->str.substr(1U, cback()->str.size() - 2U));
location.line = std::atol(cback()->previous->str.c_str());
}
// #endfile
else if (lastline == "# endfile" && !loc.empty()) {
location = loc.top();
loc.pop();
}
}
continue;
}
if (std::isspace(ch)) {
location.col++;
continue;
}
TokenString currentToken;
// number or name
if (isNameChar(ch)) {
while (istr.good() && isNameChar(ch)) {
currentToken += ch;
ch = readChar(istr,bom);
}
ungetChar(istr,bom);
}
// comment
else if (ch == '/' && peekChar(istr,bom) == '/') {
while (istr.good() && ch != '\r' && ch != '\n') {
currentToken += ch;
ch = readChar(istr, bom);
}
const std::string::size_type pos = currentToken.find_last_not_of(" \t");
if (pos < currentToken.size() - 1U && currentToken[pos] == '\\')
portabilityBackslash(outputList, files, location);
if (currentToken[currentToken.size() - 1U] == '\\') {
++multiline;
currentToken.erase(currentToken.size() - 1U);
} else {
istr.unget();
}
}
// comment
else if (ch == '/' && peekChar(istr,bom) == '*') {
currentToken = "/*";
(void)readChar(istr,bom);
ch = readChar(istr,bom);
while (istr.good()) {
currentToken += ch;
if (currentToken.size() >= 4U && endsWith(currentToken, "*/"))
break;
ch = readChar(istr,bom);
}
// multiline..
std::string::size_type pos = 0;
while ((pos = currentToken.find("\\\n",pos)) != std::string::npos) {
currentToken.erase(pos,2);
++multiline;
}
if (multiline || startsWith(lastLine(10),"# ")) {
pos = 0;
while ((pos = currentToken.find("\n",pos)) != std::string::npos) {
currentToken.erase(pos,1);
++multiline;
}
}
}
// string / char literal
else if (ch == '\"' || ch == '\'') {
// C++11 raw string literal
if (ch == '\"' && cback() && cback()->op == 'R') {
std::string delim;
ch = readChar(istr,bom);
while (istr.good() && ch != '(' && ch != '\"' && ch != '\n') {
delim += ch;
ch = readChar(istr,bom);
}
if (!istr.good() || ch == '\"' || ch == '\n')
// TODO report
return;
currentToken = '\"';
const std::string endOfRawString(')' + delim + '\"');
while (istr.good() && !endsWith(currentToken, endOfRawString))
currentToken += readChar(istr,bom);
if (!endsWith(currentToken, endOfRawString))
// TODO report
return;
currentToken.erase(currentToken.size() - endOfRawString.size(), endOfRawString.size() - 1U);
back()->setstr(escapeString(currentToken));
location.col += currentToken.size() + 2U + 2 * delim.size();
continue;
}
currentToken = readUntil(istr,location,ch,ch,outputList);
if (currentToken.size() < 2U)
// TODO report
return;
}
else {
currentToken += ch;
}
if (currentToken == "<" && lastLine() == "# include") {
currentToken = readUntil(istr, location, '<', '>', outputList);
if (currentToken.size() < 2U)
return;
}
push_back(new Token(currentToken, location));
if (multiline)
location.col += currentToken.size();
else
location.adjust(currentToken);
}
combineOperators();
}
void simplecpp::TokenList::constFold() {
while (cfront()) {
// goto last '('
Token *tok = back();
while (tok && tok->op != '(')
tok = tok->previous;
// no '(', goto first token
if (!tok)
tok = front();
// Constant fold expression
constFoldUnaryNotPosNeg(tok);
constFoldMulDivRem(tok);
constFoldAddSub(tok);
constFoldComparison(tok);
constFoldBitwise(tok);
constFoldLogicalOp(tok);
constFoldQuestionOp(&tok);
// If there is no '(' we are done with the constant folding
if (tok->op != '(')
break;
if (!tok->next || !tok->next->next || tok->next->next->op != ')')
break;
tok = tok->next;
deleteToken(tok->previous);
deleteToken(tok->next);
}
}
void simplecpp::TokenList::combineOperators() {
for (Token *tok = front(); tok; tok = tok->next) {
if (tok->op == '.') {
// float literals..
if (tok->previous && tok->previous->number) {
tok->setstr(tok->previous->str + '.');
deleteToken(tok->previous);
if (tok->next && tok->next->startsWithOneOf("Ee")) {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
}
}
if (tok->next && tok->next->number) {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
}
}
// match: [0-9.]+E [+-] [0-9]+
const char lastChar = tok->str[tok->str.size() - 1];
if (tok->number && (lastChar == 'E' || lastChar == 'e') && tok->next && tok->next->isOneOf("+-") && tok->next->next && tok->next->next->number) {
tok->setstr(tok->str + tok->next->op + tok->next->next->str);
deleteToken(tok->next);
deleteToken(tok->next);
}
if (tok->op == '\0' || !tok->next || tok->next->op == '\0')
continue;
if (!sameline(tok,tok->next))
continue;
if (tok->location.col + 1U != tok->next->location.col)
continue;
if (tok->next->op == '=' && tok->isOneOf("=!<>+-*/%&|^")) {
tok->setstr(tok->str + "=");
deleteToken(tok->next);
} else if ((tok->op == '|' || tok->op == '&') && tok->op == tok->next->op) {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
} else if (tok->op == ':' && tok->next->op == ':') {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
} else if (tok->op == '-' && tok->next->op == '>') {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
} else if ((tok->op == '<' || tok->op == '>') && tok->op == tok->next->op) {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
if (tok->next && tok->next->op == '=') {
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
}
} else if ((tok->op == '+' || tok->op == '-') && tok->op == tok->next->op) {
if (tok->location.col + 1U != tok->next->location.col)
continue;
if (tok->previous && tok->previous->number)
continue;
if (tok->next->next && tok->next->next->number)
continue;
tok->setstr(tok->str + tok->next->str);
deleteToken(tok->next);
}
}
}
void simplecpp::TokenList::constFoldUnaryNotPosNeg(simplecpp::Token *tok) {
const std::string NOT("not");
for (; tok && tok->op != ')'; tok = tok->next) {
// "not" might be !
if (isAlternativeUnaryOp(tok, NOT))
tok->op = '!';
if (tok->op == '!' && tok->next && tok->next->number) {
tok->setstr(tok->next->str == "0" ? "1" : "0");
deleteToken(tok->next);
}
else {
if (tok->previous && (tok->previous->number || tok->previous->name))
continue;
if (!tok->next || !tok->next->number)
continue;
switch (tok->op) {
case '+':
tok->setstr(tok->next->str);
deleteToken(tok->next);
break;
case '-':
tok->setstr(tok->op + tok->next->str);
deleteToken(tok->next);
break;
}
}
}
}
void simplecpp::TokenList::constFoldMulDivRem(Token *tok) {
for (; tok && tok->op != ')'; tok = tok->next) {
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next || !tok->next->number)
continue;
long long result;
if (tok->op == '*')
result = (stringToLL(tok->previous->str) * stringToLL(tok->next->str));
else if (tok->op == '/' || tok->op == '%') {
long long rhs = stringToLL(tok->next->str);
if (rhs == 0)
throw std::overflow_error("division/modulo by zero");
long long lhs = stringToLL(tok->previous->str);
if (rhs == -1 && lhs == std::numeric_limits<long long>::min())
throw std::overflow_error("division overflow");
if (tok->op == '/')
result = (lhs / rhs);
else
result = (lhs % rhs);
}
else
continue;
tok = tok->previous;
tok->setstr(toString(result));
deleteToken(tok->next);
deleteToken(tok->next);
}
}
void simplecpp::TokenList::constFoldAddSub(Token *tok) {
for (; tok && tok->op != ')'; tok = tok->next) {
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next || !tok->next->number)
continue;
long long result;
if (tok->op == '+')
result = stringToLL(tok->previous->str) + stringToLL(tok->next->str);
else if (tok->op == '-')
result = stringToLL(tok->previous->str) - stringToLL(tok->next->str);
else
continue;
tok = tok->previous;
tok->setstr(toString(result));
deleteToken(tok->next);
deleteToken(tok->next);
}
}
void simplecpp::TokenList::constFoldComparison(Token *tok) {
const std::string NOTEQ("not_eq");
for (; tok && tok->op != ')'; tok = tok->next) {
if (isAlternativeBinaryOp(tok,NOTEQ))
tok->setstr("!=");
if (!tok->startsWithOneOf("<>=!"))
continue;
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next || !tok->next->number)
continue;
int result;
if (tok->str == "==")
result = (stringToLL(tok->previous->str) == stringToLL(tok->next->str));
else if (tok->str == "!=")
result = (stringToLL(tok->previous->str) != stringToLL(tok->next->str));
else if (tok->str == ">")
result = (stringToLL(tok->previous->str) > stringToLL(tok->next->str));
else if (tok->str == ">=")
result = (stringToLL(tok->previous->str) >= stringToLL(tok->next->str));
else if (tok->str == "<")
result = (stringToLL(tok->previous->str) < stringToLL(tok->next->str));
else if (tok->str == "<=")
result = (stringToLL(tok->previous->str) <= stringToLL(tok->next->str));
else
continue;
tok = tok->previous;
tok->setstr(toString(result));
deleteToken(tok->next);
deleteToken(tok->next);
}
}
void simplecpp::TokenList::constFoldBitwise(Token *tok)
{
Token * const tok1 = tok;
for (const char *op = "&^|"; *op; op++) {
std::string altop;
if (*op == '&')
altop = "bitand";
else if (*op == '|')
altop = "bitor";
else
altop = "xor";
for (tok = tok1; tok && tok->op != ')'; tok = tok->next) {
if (tok->op != *op && !isAlternativeBinaryOp(tok, altop))
continue;
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next || !tok->next->number)
continue;
long long result;
if (*op == '&')
result = (stringToLL(tok->previous->str) & stringToLL(tok->next->str));
else if (*op == '^')
result = (stringToLL(tok->previous->str) ^ stringToLL(tok->next->str));
else /*if (*op == '|')*/
result = (stringToLL(tok->previous->str) | stringToLL(tok->next->str));
tok = tok->previous;
tok->setstr(toString(result));
deleteToken(tok->next);
deleteToken(tok->next);
}
}
}
void simplecpp::TokenList::constFoldLogicalOp(Token *tok) {
const std::string AND("and");
const std::string OR("or");
for (; tok && tok->op != ')'; tok = tok->next) {
if (tok->name) {
if (isAlternativeBinaryOp(tok,AND))
tok->setstr("&&");
else if (isAlternativeBinaryOp(tok,OR))
tok->setstr("||");
}
if (tok->str != "&&" && tok->str != "||")
continue;
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next || !tok->next->number)
continue;
int result;
if (tok->str == "||")
result = (stringToLL(tok->previous->str) || stringToLL(tok->next->str));
else /*if (tok->str == "&&")*/
result = (stringToLL(tok->previous->str) && stringToLL(tok->next->str));
tok = tok->previous;
tok->setstr(toString(result));
deleteToken(tok->next);
deleteToken(tok->next);
}
}
void simplecpp::TokenList::constFoldQuestionOp(Token **tok1) {
bool gotoTok1 = false;
for (Token *tok = *tok1; tok && tok->op != ')'; tok = gotoTok1 ? *tok1 : tok->next) {
gotoTok1 = false;
if (tok->str != "?")
continue;
if (!tok->previous || !tok->previous->number)
continue;
if (!tok->next)
continue;
if (!tok->next->next || tok->next->next->op != ':')
continue;
Token * const condTok = tok->previous;
Token * const trueTok = tok->next;
Token * const falseTok = trueTok->next->next;
if (condTok == *tok1)
*tok1 = (condTok->str != "0" ? trueTok : falseTok);
deleteToken(condTok->next); // ?
deleteToken(trueTok->next); // :
deleteToken(condTok->str == "0" ? trueTok : falseTok);
deleteToken(condTok);
gotoTok1 = true;
}
}
void simplecpp::TokenList::removeComments() {
Token *tok = frontToken;
while (tok) {
Token *tok1 = tok;
tok = tok->next;
if (tok1->comment)
deleteToken(tok1);
}
}
std::string simplecpp::TokenList::readUntil(std::istream &istr, const Location &location, const char start, const char end, OutputList *outputList) {
std::string ret;
ret += start;
char ch = 0;
while (ch != end && ch != '\r' && ch != '\n' && istr.good()) {
ch = (unsigned char)istr.get();
ret += ch;
if (ch == '\\')
ret += (unsigned char)istr.get();
}
if (!istr.good() || ch != end) {
clear();
if (outputList) {
Output err(files);
err.type = Output::SYNTAX_ERROR;
err.location = location;
err.msg = std::string("No pair for character (") + start + "). Can't process file. File is either invalid or unicode, which is currently not supported.";
outputList->push_back(err);
}
return "";
}
return ret;
}
std::string simplecpp::TokenList::lastLine(int maxsize) const {
std::string ret;
int count = 0;
for (const Token *tok = cback(); sameline(tok,cback()); tok = tok->previous) {
if (tok->comment)
continue;
if (!ret.empty())
ret = ' ' + ret;
ret = (tok->str[0] == '\"' ? std::string("%str%")
: std::isdigit(static_cast<unsigned char>(tok->str[0])) ? std::string("%num%") : tok->str) + ret;
if (++count > maxsize)
return "";
}
return ret;
}
unsigned int simplecpp::TokenList::fileIndex(const std::string &filename) {
for (unsigned int i = 0; i < files.size(); ++i) {
if (files[i] == filename)
return i;
}
files.push_back(filename);
return files.size() - 1U;
}
namespace simplecpp {
class Macro {
public:
explicit Macro(std::vector<std::string> &f) : nameToken(NULL), variadic(false), valueToken(NULL), endToken(NULL), files(f), tokenListDefine(f) {}
Macro(const Token *tok, std::vector<std::string> &f) : nameToken(NULL), files(f), tokenListDefine(f) {
if (sameline(tok->previous, tok))
throw std::runtime_error("bad macro syntax");
if (tok->op != '#')
throw std::runtime_error("bad macro syntax");
tok = tok->next;
if (!tok || tok->str != DEFINE)
throw std::runtime_error("bad macro syntax");
tok = tok->next;
if (!tok || !tok->name)
throw std::runtime_error("bad macro syntax");
parseDefine(tok);
}
Macro(const std::string &name, const std::string &value, std::vector<std::string> &f) : nameToken(NULL), files(f), tokenListDefine(f) {
const std::string def(name + ' ' + value);
std::istringstream istr(def);
tokenListDefine.readfile(istr);
parseDefine(tokenListDefine.cfront());
}
Macro(const Macro &macro) : nameToken(NULL), files(macro.files), tokenListDefine(macro.files) {
*this = macro;
}
void operator=(const Macro &macro) {
if (this != &macro) {
if (macro.tokenListDefine.empty())
parseDefine(macro.nameToken);
else {
tokenListDefine = macro.tokenListDefine;
parseDefine(tokenListDefine.cfront());
}
}
}
/**
* Expand macro. This will recursively expand inner macros.
* @param output destination tokenlist
* @param rawtok macro token
* @param macros list of macros
* @param files the files
* @return token after macro
* @throw Can throw wrongNumberOfParameters or invalidHashHash
*/
const Token * expand(TokenList * const output,
const Token * rawtok,
const std::map<TokenString,Macro> &macros,
std::vector<std::string> &files) const {
std::set<TokenString> expandedmacros;
TokenList output2(files);
if (functionLike() && rawtok->next && rawtok->next->op == '(') {
// Copy macro call to a new tokenlist with no linebreaks
const Token * const rawtok1 = rawtok;
TokenList rawtokens2(files);
rawtokens2.push_back(new Token(rawtok->str, rawtok1->location));
rawtok = rawtok->next;
rawtokens2.push_back(new Token(rawtok->str, rawtok1->location));
rawtok = rawtok->next;
int par = 1;
while (rawtok && par > 0) {
if (rawtok->op == '(')
++par;
else if (rawtok->op == ')')
--par;
rawtokens2.push_back(new Token(rawtok->str, rawtok1->location));
rawtok = rawtok->next;
}
if (expand(&output2, rawtok1->location, rawtokens2.cfront(), macros, expandedmacros))
rawtok = rawtok1->next;
} else {
rawtok = expand(&output2, rawtok->location, rawtok, macros, expandedmacros);
}
while (output2.cback() && rawtok) {
unsigned int par = 0;
Token* macro2tok = output2.back();
while (macro2tok) {
if (macro2tok->op == '(') {
if (par==0)
break;
--par;
}
else if (macro2tok->op == ')')
++par;
macro2tok = macro2tok->previous;
}
if (macro2tok) { // macro2tok->op == '('
macro2tok = macro2tok->previous;
expandedmacros.insert(name());
}
else if (rawtok->op == '(')
macro2tok = output2.back();
if (!macro2tok || !macro2tok->name)
break;
if (output2.cfront() != output2.cback() && macro2tok->str == this->name())
break;
const std::map<TokenString,Macro>::const_iterator macro = macros.find(macro2tok->str);
if (macro == macros.end() || !macro->second.functionLike())
break;
TokenList rawtokens2(files);
const Location loc(macro2tok->location);
while (macro2tok) {
Token *next = macro2tok->next;
rawtokens2.push_back(new Token(macro2tok->str, loc));
output2.deleteToken(macro2tok);
macro2tok = next;
}
par = (rawtokens2.cfront() != rawtokens2.cback()) ? 1U : 0U;
const Token *rawtok2 = rawtok;
for (; rawtok2; rawtok2 = rawtok2->next) {
rawtokens2.push_back(new Token(rawtok2->str, loc));
if (rawtok2->op == '(')
++par;
else if (rawtok2->op == ')') {
if (par <= 1U)
break;
--par;
}
}
if (!rawtok2 || par != 1U)
break;
if (macro->second.expand(&output2, rawtok->location, rawtokens2.cfront(), macros, expandedmacros) != NULL)
break;
rawtok = rawtok2->next;
}
output->takeTokens(output2);
return rawtok;
}
/** macro name */
const TokenString &name() const {
return nameToken->str;
}
/** location for macro definition */
const Location &defineLocation() const {
return nameToken->location;
}
/** how has this macro been used so far */
const std::list<Location> &usage() const {
return usageList;
}
/** is this a function like macro */
bool functionLike() const {
return nameToken->next &&
nameToken->next->op == '(' &&
sameline(nameToken, nameToken->next) &&
nameToken->next->location.col == nameToken->location.col + nameToken->str.size();
}
/** base class for errors */
struct Error {
Error(const Location &loc, const std::string &s) : location(loc), what(s) {}
Location location;
std::string what;
};
/** Struct that is thrown when macro is expanded with wrong number of parameters */
struct wrongNumberOfParameters : public Error {
wrongNumberOfParameters(const Location &loc, const std::string &macroName) : Error(loc, "Wrong number of parameters for macro \'" + macroName + "\'.") {}
};
/** Struct that is thrown when there is invalid ## usage */
struct invalidHashHash : public Error {
invalidHashHash(const Location &loc, const std::string &macroName) : Error(loc, "Invalid ## usage when expanding \'" + macroName + "\'.") {}
};
private:
/** Create new token where Token::macro is set for replaced tokens */
Token *newMacroToken(const TokenString &str, const Location &loc, bool replaced) const {
Token *tok = new Token(str,loc);
if (replaced)
tok->macro = nameToken->str;
return tok;
}
void parseDefine(const Token *nametoken) {
nameToken = nametoken;
variadic = false;
if (!nameToken) {
valueToken = endToken = NULL;
args.clear();
return;
}
// function like macro..
if (functionLike()) {
args.clear();
const Token *argtok = nameToken->next->next;
while (argtok && argtok->op != ')') {
if (argtok->op == '.' &&
argtok->next && argtok->next->op == '.' &&
argtok->next->next && argtok->next->next->op == '.' &&
argtok->next->next->next && argtok->next->next->next->op == ')') {
variadic = true;
if (!argtok->previous->name)
args.push_back("__VA_ARGS__");
argtok = argtok->next->next->next; // goto ')'
break;
}
if (argtok->op != ',')
args.push_back(argtok->str);
argtok = argtok->next;
}
valueToken = argtok ? argtok->next : NULL;
} else {
args.clear();
valueToken = nameToken->next;
}
if (!sameline(valueToken, nameToken))
valueToken = NULL;
endToken = valueToken;
while (sameline(endToken, nameToken))
endToken = endToken->next;
}
unsigned int getArgNum(const TokenString &str) const {
unsigned int par = 0;
while (par < args.size()) {
if (str == args[par])
return par;
par++;
}
return ~0U;
}
std::vector<const Token *> getMacroParameters(const Token *nameToken, bool calledInDefine) const {
if (!nameToken->next || nameToken->next->op != '(' || !functionLike())
return std::vector<const Token *>();
std::vector<const Token *> parametertokens;
parametertokens.push_back(nameToken->next);
unsigned int par = 0U;
for (const Token *tok = nameToken->next->next; calledInDefine ? sameline(tok,nameToken) : (tok != NULL); tok = tok->next) {
if (tok->op == '(')
++par;
else if (tok->op == ')') {
if (par == 0U) {
parametertokens.push_back(tok);
break;
}
--par;
}
else if (par == 0U && tok->op == ',' && (!variadic || parametertokens.size() < args.size()))
parametertokens.push_back(tok);
}
return parametertokens;
}
const Token *appendTokens(TokenList *tokens,
const Token *lpar,
const std::map<TokenString,Macro> &macros,
const std::set<TokenString> &expandedmacros,
const std::vector<const Token*> &parametertokens) const {
if (!lpar || lpar->op != '(')
return NULL;
unsigned int par = 0;
const Token *tok = lpar;
while (sameline(lpar, tok)) {
if (tok->op == '#' && sameline(tok,tok->next) && tok->next->op == '#' && sameline(tok,tok->next->next)) {
// A##B => AB
tok = expandHashHash(tokens, tok->location, tok, macros, expandedmacros, parametertokens);
} else if (tok->op == '#' && sameline(tok, tok->next) && tok->next->op != '#') {
tok = expandHash(tokens, tok->location, tok, macros, expandedmacros, parametertokens);
} else {
if (!expandArg(tokens, tok, tok->location, macros, expandedmacros, parametertokens)) {
bool expanded = false;
if (macros.find(tok->str) != macros.end() && expandedmacros.find(tok->str) == expandedmacros.end()) {
const std::map<TokenString, Macro>::const_iterator it = macros.find(tok->str);
const Macro &m = it->second;
if (!m.functionLike()) {
m.expand(tokens, tok, macros, files);
expanded = true;
}
}
if (!expanded)
tokens->push_back(new Token(*tok));
}
if (tok->op == '(')
++par;
else if (tok->op == ')') {
--par;
if (par == 0U)
break;
}
tok = tok->next;
}
}
return sameline(lpar,tok) ? tok : NULL;
}
const Token * expand(TokenList * const output, const Location &loc, const Token * const nameToken, const std::map<TokenString,Macro> &macros, std::set<TokenString> expandedmacros) const {
expandedmacros.insert(nameToken->str);
usageList.push_back(loc);
if (nameToken->str == "__FILE__") {
output->push_back(new Token('\"'+loc.file()+'\"', loc));
return nameToken->next;
}
if (nameToken->str == "__LINE__") {
output->push_back(new Token(toString(loc.line), loc));
return nameToken->next;
}
if (nameToken->str == "__COUNTER__") {
output->push_back(new Token(toString(usageList.size()-1U), loc));
return nameToken->next;
}
const bool calledInDefine = (loc.fileIndex != nameToken->location.fileIndex ||
loc.line < nameToken->location.line);
std::vector<const Token*> parametertokens1(getMacroParameters(nameToken, calledInDefine));
if (functionLike()) {
// No arguments => not macro expansion
if (nameToken->next && nameToken->next->op != '(') {
output->push_back(new Token(nameToken->str, loc));
return nameToken->next;
}
// Parse macro-call
if (variadic) {
if (parametertokens1.size() < args.size()) {
throw wrongNumberOfParameters(nameToken->location, name());
}
} else {
if (parametertokens1.size() != args.size() + (args.empty() ? 2U : 1U))
throw wrongNumberOfParameters(nameToken->location, name());
}
}
// If macro call uses __COUNTER__ then expand that first
TokenList tokensparams(files);
std::vector<const Token *> parametertokens2;
if (!parametertokens1.empty()) {
bool counter = false;
for (const Token *tok = parametertokens1[0]; tok != parametertokens1.back(); tok = tok->next) {
if (tok->str == "__COUNTER__") {
counter = true;
break;
}
}
const std::map<TokenString,Macro>::const_iterator m = macros.find("__COUNTER__");
if (!counter || m == macros.end())
parametertokens2.swap(parametertokens1);
else {
const Macro &counterMacro = m->second;
unsigned int par = 0;
for (const Token *tok = parametertokens1[0]; tok && par < parametertokens1.size(); tok = tok->next) {
if (tok->str == "__COUNTER__") {
tokensparams.push_back(new Token(toString(counterMacro.usageList.size()), tok->location));
counterMacro.usageList.push_back(tok->location);
} else {
tokensparams.push_back(new Token(*tok));
if (tok == parametertokens1[par]) {
parametertokens2.push_back(tokensparams.cback());
par++;
}
}
}
}
}
Token * const output_end_1 = output->back();
// expand
for (const Token *tok = valueToken; tok != endToken;) {
if (tok->op != '#') {
// A##B => AB
if (tok->next && tok->next->op == '#' && tok->next->next && tok->next->next->op == '#') {
if (!sameline(tok, tok->next->next->next))
throw invalidHashHash(tok->location, name());
output->push_back(newMacroToken(expandArgStr(tok, parametertokens2), loc, isReplaced(expandedmacros)));
tok = tok->next;
} else {
tok = expandToken(output, loc, tok, macros, expandedmacros, parametertokens2);
}
continue;
}
int numberOfHash = 1;
const Token *hashToken = tok->next;
while (sameline(tok,hashToken) && hashToken->op == '#') {
hashToken = hashToken->next;
++numberOfHash;
}
if (numberOfHash == 4) {
// # ## # => ##
output->push_back(newMacroToken("##", loc, isReplaced(expandedmacros)));
tok = hashToken;
continue;
}
tok = tok->next;
if (tok == endToken) {
output->push_back(new Token(*tok->previous));
break;
}
if (tok->op == '#') {
// A##B => AB
tok = expandHashHash(output, loc, tok->previous, macros, expandedmacros, parametertokens2);
} else {
// #123 => "123"
tok = expandHash(output, loc, tok->previous, macros, expandedmacros, parametertokens2);
}
}
if (!functionLike()) {
for (Token *tok = output_end_1 ? output_end_1->next : output->front(); tok; tok = tok->next) {
tok->macro = nameToken->str;
}
}
if (!parametertokens1.empty())
parametertokens1.swap(parametertokens2);
return functionLike() ? parametertokens2.back()->next : nameToken->next;
}
const Token *expandToken(TokenList *output, const Location &loc, const Token *tok, const std::map<TokenString,Macro> &macros, const std::set<TokenString> &expandedmacros, const std::vector<const Token*> &parametertokens) const {
// Not name..
if (!tok->name) {
output->push_back(newMacroToken(tok->str, loc, true));
return tok->next;
}
// Macro parameter..
{
TokenList temp(files);
if (expandArg(&temp, tok, loc, macros, expandedmacros, parametertokens)) {
if (!(temp.cback() && temp.cback()->name && tok->next && tok->next->op == '(')) {
output->takeTokens(temp);
return tok->next;
}
const std::map<TokenString, Macro>::const_iterator it = macros.find(temp.cback()->str);
if (it == macros.end() || expandedmacros.find(temp.cback()->str) != expandedmacros.end()) {
output->takeTokens(temp);
return tok->next;
}
const Macro &calledMacro = it->second;
if (!calledMacro.functionLike()) {
output->takeTokens(temp);
return tok->next;
}
TokenList temp2(files);
temp2.push_back(new Token(temp.cback()->str, tok->location));
const Token *tok2 = appendTokens(&temp2, tok->next, macros, expandedmacros, parametertokens);
if (!tok2)
return tok->next;
output->takeTokens(temp);
output->deleteToken(output->back());
calledMacro.expand(output, loc, temp2.cfront(), macros, expandedmacros);
return tok2->next;
}
}
// Macro..
const std::map<TokenString, Macro>::const_iterator it = macros.find(tok->str);
if (it != macros.end() && expandedmacros.find(tok->str) == expandedmacros.end()) {
const Macro &calledMacro = it->second;
if (!calledMacro.functionLike())
return calledMacro.expand(output, loc, tok, macros, expandedmacros);
if (!sameline(tok, tok->next) || tok->next->op != '(') {
output->push_back(newMacroToken(tok->str, loc, true));
return tok->next;
}
TokenList tokens(files);
tokens.push_back(new Token(*tok));
const Token *tok2 = appendTokens(&tokens, tok->next, macros, expandedmacros, parametertokens);
if (!tok2) {
output->push_back(newMacroToken(tok->str, loc, true));
return tok->next;
}
calledMacro.expand(output, loc, tokens.cfront(), macros, expandedmacros);
return tok2->next;
}
output->push_back(newMacroToken(tok->str, loc, true));
return tok->next;
}
bool expandArg(TokenList *output, const Token *tok, const std::vector<const Token*> &parametertokens) const {
if (!tok->name)
return false;
const unsigned int argnr = getArgNum(tok->str);
if (argnr >= args.size())
return false;
// empty variadic parameter
if (variadic && argnr + 1U >= parametertokens.size())
return true;
for (const Token *partok = parametertokens[argnr]->next; partok != parametertokens[argnr + 1U]; partok = partok->next)
output->push_back(new Token(*partok));
return true;
}
bool expandArg(TokenList *output, const Token *tok, const Location &loc, const std::map<TokenString, Macro> &macros, const std::set<TokenString> &expandedmacros, const std::vector<const Token*> &parametertokens) const {
if (!tok->name)
return false;
const unsigned int argnr = getArgNum(tok->str);
if (argnr >= args.size())
return false;
if (variadic && argnr + 1U >= parametertokens.size()) // empty variadic parameter
return true;
for (const Token *partok = parametertokens[argnr]->next; partok != parametertokens[argnr + 1U];) {
const std::map<TokenString, Macro>::const_iterator it = macros.find(partok->str);
if (it != macros.end() && (partok->str == name() || expandedmacros.find(partok->str) == expandedmacros.end()))
partok = it->second.expand(output, loc, partok, macros, expandedmacros);
else {
output->push_back(newMacroToken(partok->str, loc, isReplaced(expandedmacros)));
partok = partok->next;
}
}
return true;
}
/**
* Get string for token. If token is argument, the expanded string is returned.
* @param tok The token
* @param parametertokens parameters given when expanding this macro
* @return string
*/
std::string expandArgStr(const Token *tok, const std::vector<const Token *> &parametertokens) const {
TokenList tokens(files);
if (expandArg(&tokens, tok, parametertokens)) {
std::string s;
for (const Token *tok2 = tokens.cfront(); tok2; tok2 = tok2->next)
s += tok2->str;
return s;
}
return tok->str;
}
/**
* Expand #X => "X"
* @param output destination tokenlist
* @param loc location for expanded token
* @param tok The # token
* @param macros all macros
* @param expandedmacros set with expanded macros, with this macro
* @param parametertokens parameters given when expanding this macro
* @return token after the X
*/
const Token *expandHash(TokenList *output, const Location &loc, const Token *tok, const std::map<TokenString, Macro> &macros, const std::set<TokenString> &expandedmacros, const std::vector<const Token*> &parametertokens) const {
TokenList tokenListHash(files);
tok = expandToken(&tokenListHash, loc, tok->next, macros, expandedmacros, parametertokens);
std::ostringstream ostr;
ostr << '\"';
for (const Token *hashtok = tokenListHash.cfront(); hashtok; hashtok = hashtok->next)
ostr << hashtok->str;
ostr << '\"';
output->push_back(newMacroToken(escapeString(ostr.str()), loc, isReplaced(expandedmacros)));
return tok;
}
/**
* Expand A##B => AB
* The A should already be expanded. Call this when you reach the first # token
* @param output destination tokenlist
* @param loc location for expanded token
* @param tok first # token
* @param macros all macros
* @param expandedmacros set with expanded macros, with this macro
* @param parametertokens parameters given when expanding this macro
* @return token after B
*/
const Token *expandHashHash(TokenList *output, const Location &loc, const Token *tok, const std::map<TokenString, Macro> &macros, const std::set<TokenString> &expandedmacros, const std::vector<const Token*> &parametertokens) const {
Token *A = output->back();
if (!A)
throw invalidHashHash(tok->location, name());
if (!sameline(tok, tok->next) || !sameline(tok, tok->next->next))
throw invalidHashHash(tok->location, name());
Token *B = tok->next->next;
std::string strAB;
const bool varargs = variadic && args.size() >= 1U && B->str == args[args.size()-1U];
TokenList tokensB(files);
if (expandArg(&tokensB, B, parametertokens)) {
if (tokensB.empty())
strAB = A->str;
else if (varargs && A->op == ',') {
strAB = ",";
} else {
strAB = A->str + tokensB.cfront()->str;
tokensB.deleteToken(tokensB.front());
}
} else {
strAB = A->str + B->str;
}
const Token *nextTok = B->next;
if (varargs && tokensB.empty() && tok->previous->str == ",")
output->deleteToken(A);
else {
output->deleteToken(A);
TokenList tokens(files);
tokens.push_back(new Token(strAB, tok->location));
// for function like macros, push the (...)
if (tokensB.empty() && sameline(B,B->next) && B->next->op=='(') {
const std::map<TokenString,Macro>::const_iterator it = macros.find(strAB);
if (it != macros.end() && expandedmacros.find(strAB) == expandedmacros.end() && it->second.functionLike()) {
const Token *tok2 = appendTokens(&tokens, B->next, macros, expandedmacros, parametertokens);
if (tok2)
nextTok = tok2->next;
}
}
expandToken(output, loc, tokens.cfront(), macros, expandedmacros, parametertokens);
for (Token *b = tokensB.front(); b; b = b->next)
b->location = loc;
output->takeTokens(tokensB);
}
return nextTok;
}
bool isReplaced(const std::set<std::string> &expandedmacros) const {
// return true if size > 1
std::set<std::string>::const_iterator it = expandedmacros.begin();
if (it == expandedmacros.end())
return false;
++it;
return (it != expandedmacros.end());
}
/** name token in definition */
const Token *nameToken;
/** arguments for macro */
std::vector<TokenString> args;
/** is macro variadic? */
bool variadic;
/** first token in replacement string */
const Token *valueToken;
/** token after replacement string */
const Token *endToken;
/** files */
std::vector<std::string> &files;
/** this is used for -D where the definition is not seen anywhere in code */
TokenList tokenListDefine;
/** usage of this macro */
mutable std::list<Location> usageList;
};
}
namespace simplecpp {
#ifdef SIMPLECPP_WINDOWS
static bool realFileName(const std::vector<TCHAR> &buf, std::ostream &ostr) {
// Detect root directory, see simplecpp:realFileName returns the wrong root path #45
if ((buf.size()==2 || (buf.size()>2 && buf[2]=='\0'))
&& std::isalpha(buf[0]) && buf[1]==':')
{
ostr << (char)buf[0];
ostr << (char)buf[1];
return true;
}
WIN32_FIND_DATA FindFileData;
HANDLE hFind = FindFirstFile(&buf[0], &FindFileData);
if (hFind == INVALID_HANDLE_VALUE)
return false;
for (const TCHAR *c = FindFileData.cFileName; *c; c++)
ostr << (char)*c;
FindClose(hFind);
return true;
}
std::string realFilename(const std::string &f) {
std::vector<TCHAR> buf(f.size()+1U, 0);
for (unsigned int i = 0; i < f.size(); ++i)
buf[i] = f[i];
std::ostringstream ostr;
std::string::size_type sep = 0;
while ((sep = f.find_first_of("\\/", sep + 1U)) != std::string::npos) {
buf[sep] = 0;
if (!realFileName(buf,ostr))
return f;
ostr << '/';
buf[sep] = '/';
}
if (!realFileName(buf, ostr))
return f;
return ostr.str();
}
#else
#define realFilename(f) f
#endif
/**
* perform path simplifications for . and ..
*/
std::string simplifyPath(std::string path) {
std::string::size_type pos;
// replace backslash separators
std::replace(path.begin(), path.end(), '\\', '/');
// "./" at the start
if (path.size() > 3 && path.compare(0,2,"./") == 0 && path[2] != '/')
path.erase(0,2);
// remove "/./"
pos = 0;
while ((pos = path.find("/./",pos)) != std::string::npos) {
path.erase(pos,2);
}
// remove "xyz/../"
pos = 1U;
while ((pos = path.find("/../", pos)) != std::string::npos) {
const std::string::size_type pos1 = path.rfind("/", pos - 1U);
if (pos1 == std::string::npos)
pos++;
else {
path.erase(pos1,pos-pos1+3);
pos = std::min((std::string::size_type)1, pos1);
}
}
return realFilename(path);
}
}
namespace {
/** Evaluate sizeof(type) */
void simplifySizeof(simplecpp::TokenList &expr, const std::map<std::string, std::size_t> &sizeOfType) {
for (simplecpp::Token *tok = expr.front(); tok; tok = tok->next) {
if (tok->str != "sizeof")
continue;
simplecpp::Token *tok1 = tok->next;
if (!tok1) {
throw std::runtime_error("missed sizeof argument");
}
simplecpp::Token *tok2 = tok1->next;
if (!tok2) {
throw std::runtime_error("missed sizeof argument");
}
if (tok1->op == '(') {
tok1 = tok1->next;
while (tok2->op != ')')
tok2 = tok2->next;
}
std::string type;
for (simplecpp::Token *typeToken = tok1; typeToken != tok2; typeToken = typeToken->next) {
if ((typeToken->str == "unsigned" || typeToken->str == "signed") && typeToken->next->name)
continue;
if (typeToken->str == "*" && type.find("*") != std::string::npos)
continue;
if (!type.empty())
type += ' ';
type += typeToken->str;
}
const std::map<std::string, std::size_t>::const_iterator it = sizeOfType.find(type);
if (it != sizeOfType.end())
tok->setstr(toString(it->second));
else
continue;
tok2 = tok2->next;
while (tok->next != tok2)
expr.deleteToken(tok->next);
}
}
void simplifyName(simplecpp::TokenList &expr) {
std::set<std::string> altop;
altop.insert("and");
altop.insert("or");
altop.insert("bitand");
altop.insert("bitor");
altop.insert("not");
altop.insert("not_eq");
altop.insert("xor");
for (simplecpp::Token *tok = expr.front(); tok; tok = tok->next) {
if (tok->name) {
if (altop.find(tok->str) != altop.end()) {
bool alt;
if (tok->str == "not") {
alt = isAlternativeUnaryOp(tok,tok->str);
} else {
alt = isAlternativeBinaryOp(tok,tok->str);
}
if (alt)
continue;
}
tok->setstr("0");
}
}
}
void simplifyNumbers(simplecpp::TokenList &expr) {
for (simplecpp::Token *tok = expr.front(); tok; tok = tok->next) {
if (tok->str.size() == 1U)
continue;
if (tok->str.compare(0,2,"0x") == 0)
tok->setstr(toString(stringToULL(tok->str)));
else if (tok->str[0] == '\'')
tok->setstr(toString(tok->str[1] & 0xffU));
}
}
long long evaluate(simplecpp::TokenList &expr, const std::map<std::string, std::size_t> &sizeOfType) {
simplifySizeof(expr, sizeOfType);
simplifyName(expr);
simplifyNumbers(expr);
expr.constFold();
// TODO: handle invalid expressions
return expr.cfront() && expr.cfront() == expr.cback() && expr.cfront()->number ? stringToLL(expr.cfront()->str) : 0LL;
}
const simplecpp::Token *gotoNextLine(const simplecpp::Token *tok) {
const unsigned int line = tok->location.line;
const unsigned int file = tok->location.fileIndex;
while (tok && tok->location.line == line && tok->location.fileIndex == file)
tok = tok->next;
return tok;
}
std::string openHeader(std::ifstream &f, const simplecpp::DUI &dui, const std::string &sourcefile, const std::string &header, bool systemheader) {
if (!systemheader) {
if (sourcefile.find_first_of("\\/") != std::string::npos) {
const std::string s = sourcefile.substr(0, sourcefile.find_last_of("\\/") + 1U) + header;
f.open(s.c_str());
if (f.is_open())
return simplecpp::simplifyPath(s);
} else {
f.open(header.c_str());
if (f.is_open())
return simplecpp::simplifyPath(header);
}
}
for (std::list<std::string>::const_iterator it = dui.includePaths.begin(); it != dui.includePaths.end(); ++it) {
std::string s = *it;
if (!s.empty() && s[s.size()-1U]!='/' && s[s.size()-1U]!='\\')
s += '/';
s += header;
f.open(s.c_str());
if (f.is_open())
return simplecpp::simplifyPath(s);
}
return "";
}
std::string getFileName(const std::map<std::string, simplecpp::TokenList *> &filedata, const std::string &sourcefile, const std::string &header, const simplecpp::DUI &dui, bool systemheader) {
if (!systemheader) {
if (sourcefile.find_first_of("\\/") != std::string::npos) {
const std::string s(simplecpp::simplifyPath(sourcefile.substr(0, sourcefile.find_last_of("\\/") + 1U) + header));
if (filedata.find(s) != filedata.end())
return s;
} else {
if (filedata.find(simplecpp::simplifyPath(header)) != filedata.end())
return simplecpp::simplifyPath(header);
}
}
for (std::list<std::string>::const_iterator it = dui.includePaths.begin(); it != dui.includePaths.end(); ++it) {
std::string s = *it;
if (!s.empty() && s[s.size()-1U]!='/' && s[s.size()-1U]!='\\')
s += '/';
s += header;
s = simplecpp::simplifyPath(s);
if (filedata.find(s) != filedata.end())
return s;
}
return "";
}
bool hasFile(const std::map<std::string, simplecpp::TokenList *> &filedata, const std::string &sourcefile, const std::string &header, const simplecpp::DUI &dui, bool systemheader) {
return !getFileName(filedata, sourcefile, header, dui, systemheader).empty();
}
}
std::map<std::string, simplecpp::TokenList*> simplecpp::load(const simplecpp::TokenList &rawtokens, std::vector<std::string> &fileNumbers, const simplecpp::DUI &dui, simplecpp::OutputList *outputList)
{
std::map<std::string, simplecpp::TokenList*> ret;
std::list<const Token *> filelist;
// -include files
for (std::list<std::string>::const_iterator it = dui.includes.begin(); it != dui.includes.end(); ++it) {
const std::string &filename = realFilename(*it);
if (ret.find(filename) != ret.end())
continue;
std::ifstream fin(filename.c_str());
if (!fin.is_open())
continue;
TokenList *tokenlist = new TokenList(fin, fileNumbers, filename, outputList);
if (!tokenlist->front()) {
delete tokenlist;
continue;
}
ret[filename] = tokenlist;
filelist.push_back(tokenlist->front());
}
for (const Token *rawtok = rawtokens.cfront(); rawtok || !filelist.empty(); rawtok = rawtok ? rawtok->next : NULL) {
if (rawtok == NULL) {
rawtok = filelist.back();
filelist.pop_back();
}
if (rawtok->op != '#' || sameline(rawtok->previousSkipComments(), rawtok))
continue;
rawtok = rawtok->nextSkipComments();
if (!rawtok || rawtok->str != INCLUDE)
continue;
const std::string &sourcefile = rawtok->location.file();
const Token *htok = rawtok->nextSkipComments();
if (!sameline(rawtok, htok))
continue;
bool systemheader = (htok->str[0] == '<');
const std::string header(realFilename(htok->str.substr(1U, htok->str.size() - 2U)));
if (hasFile(ret, sourcefile, header, dui, systemheader))
continue;
std::ifstream f;
const std::string header2 = openHeader(f,dui,sourcefile,header,systemheader);
if (!f.is_open())
continue;
TokenList *tokens = new TokenList(f, fileNumbers, header2, outputList);
ret[header2] = tokens;
if (tokens->front())
filelist.push_back(tokens->front());
}
return ret;
}
static bool preprocessToken(simplecpp::TokenList &output, const simplecpp::Token **tok1, std::map<std::string, simplecpp::Macro> &macros, std::vector<std::string> &files, simplecpp::OutputList *outputList) {
const simplecpp::Token *tok = *tok1;
const std::map<std::string,simplecpp::Macro>::const_iterator it = macros.find(tok->str);
if (it != macros.end()) {
simplecpp::TokenList value(files);
try {
*tok1 = it->second.expand(&value, tok, macros, files);
} catch (simplecpp::Macro::Error &err) {
simplecpp::Output out(files);
out.type = simplecpp::Output::SYNTAX_ERROR;
out.location = err.location;
out.msg = "failed to expand \'" + tok->str + "\', " + err.what;
if (outputList)
outputList->push_back(out);
return false;
}
output.takeTokens(value);
} else {
if (!tok->comment)
output.push_back(new simplecpp::Token(*tok));
*tok1 = tok->next;
}
return true;
}
void simplecpp::preprocess(simplecpp::TokenList &output, const simplecpp::TokenList &rawtokens, std::vector<std::string> &files, const std::map<std::string, simplecpp::TokenList *> &filedata, const simplecpp::DUI &dui, simplecpp::OutputList *outputList, std::list<simplecpp::MacroUsage> *macroUsage)
{
std::map<std::string, std::size_t> sizeOfType(rawtokens.sizeOfType);
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("char"), sizeof(char)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("short"), sizeof(short)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("short int"), sizeOfType["short"]));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("int"), sizeof(int)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long"), sizeof(long)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long int"), sizeOfType["long"]));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long long"), sizeof(long long)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("float"), sizeof(float)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("double"), sizeof(double)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long double"), sizeof(long double)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("char *"), sizeof(char *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("short *"), sizeof(short *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("short int *"), sizeOfType["short *"]));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("int *"), sizeof(int *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long *"), sizeof(long *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long int *"), sizeOfType["long *"]));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long long *"), sizeof(long long *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("float *"), sizeof(float *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("double *"), sizeof(double *)));
sizeOfType.insert(std::pair<std::string, std::size_t>(std::string("long double *"), sizeof(long double *)));
std::map<TokenString, Macro> macros;
for (std::list<std::string>::const_iterator it = dui.defines.begin(); it != dui.defines.end(); ++it) {
const std::string &macrostr = *it;
const std::string::size_type eq = macrostr.find("=");
const std::string::size_type par = macrostr.find("(");
const std::string macroname = macrostr.substr(0, std::min(eq,par));
if (dui.undefined.find(macroname) != dui.undefined.end())
continue;
const std::string lhs(macrostr.substr(0,eq));
const std::string rhs(eq==std::string::npos ? std::string("1") : macrostr.substr(eq+1));
const Macro macro(lhs, rhs, files);
macros.insert(std::pair<TokenString,Macro>(macro.name(), macro));
}
macros.insert(std::pair<TokenString,Macro>("__FILE__", Macro("__FILE__", "__FILE__", files)));
macros.insert(std::pair<TokenString,Macro>("__LINE__", Macro("__LINE__", "__LINE__", files)));
macros.insert(std::pair<TokenString,Macro>("__COUNTER__", Macro("__COUNTER__", "__COUNTER__", files)));
// TRUE => code in current #if block should be kept
// ELSE_IS_TRUE => code in current #if block should be dropped. the code in the #else should be kept.
// ALWAYS_FALSE => drop all code in #if and #else
enum IfState { TRUE, ELSE_IS_TRUE, ALWAYS_FALSE };
std::stack<int> ifstates;
ifstates.push(TRUE);
std::list<TokenList *> includes;
std::stack<const Token *> includetokenstack;
std::set<std::string> pragmaOnce;
includetokenstack.push(rawtokens.cfront());
for (std::list<std::string>::const_iterator it = dui.includes.begin(); it != dui.includes.end(); ++it) {
const std::map<std::string, TokenList*>::const_iterator f = filedata.find(*it);
if (f != filedata.end())
includetokenstack.push(f->second->cfront());
}
for (const Token *rawtok = NULL; rawtok || !includetokenstack.empty();) {
if (rawtok == NULL) {
rawtok = includetokenstack.top();
includetokenstack.pop();
continue;
}
if (rawtok->op == '#' && !sameline(rawtok->previous, rawtok)) {
rawtok = rawtok->next;
if (!rawtok || !rawtok->name) {
if (rawtok)
rawtok = gotoNextLine(rawtok);
continue;
}
if (ifstates.top() == TRUE && (rawtok->str == ERROR || rawtok->str == WARNING)) {
if (outputList) {
simplecpp::Output err(rawtok->location.files);
err.type = rawtok->str == ERROR ? Output::ERROR : Output::WARNING;
err.location = rawtok->location;
for (const Token *tok = rawtok->next; tok && sameline(rawtok,tok); tok = tok->next) {
if (!err.msg.empty() && isNameChar(tok->str[0]))
err.msg += ' ';
err.msg += tok->str;
}
err.msg = '#' + rawtok->str + ' ' + err.msg;
outputList->push_back(err);
}
if (rawtok->str == ERROR) {
output.clear();
return;
}
}
if (rawtok->str == DEFINE) {
if (ifstates.top() != TRUE)
continue;
try {
const Macro &macro = Macro(rawtok->previous, files);
if (dui.undefined.find(macro.name()) == dui.undefined.end()) {
std::map<TokenString, Macro>::iterator it = macros.find(macro.name());
if (it == macros.end())
macros.insert(std::pair<TokenString, Macro>(macro.name(), macro));
else
it->second = macro;
}
} catch (const std::runtime_error &) {
}
} else if (ifstates.top() == TRUE && rawtok->str == INCLUDE) {
TokenList inc1(files);
for (const Token *inctok = rawtok->next; sameline(rawtok,inctok); inctok = inctok->next) {
if (!inctok->comment)
inc1.push_back(new Token(*inctok));
}
TokenList inc2(files);
if (!inc1.empty() && inc1.cfront()->name) {
const Token *inctok = inc1.cfront();
if (!preprocessToken(inc2, &inctok, macros, files, outputList)) {
output.clear();
return;
}
} else {
inc2.takeTokens(inc1);
}
if (inc2.empty()) {
simplecpp::Output err(files);
err.type = Output::SYNTAX_ERROR;
err.location = rawtok->location;
err.msg = "No header in #include";
if (outputList)
outputList->push_back(err);
output.clear();
return;
}
const Token *inctok = inc2.cfront();
const bool systemheader = (inctok->op == '<');
const std::string header(realFilename(inctok->str.substr(1U, inctok->str.size() - 2U)));
const std::string header2 = getFileName(filedata, rawtok->location.file(), header, dui, systemheader);
if (header2.empty()) {
simplecpp::Output output(files);
output.type = Output::MISSING_HEADER;
output.location = rawtok->location;
output.msg = "Header not found: " + rawtok->next->str;
if (outputList)
outputList->push_back(output);
} else if (includetokenstack.size() >= 400) {
simplecpp::Output out(files);
out.type = Output::INCLUDE_NESTED_TOO_DEEPLY;
out.location = rawtok->location;
out.msg = "#include nested too deeply";
if (outputList)
outputList->push_back(out);
} else if (pragmaOnce.find(header2) == pragmaOnce.end()) {
includetokenstack.push(gotoNextLine(rawtok));
const TokenList *includetokens = filedata.find(header2)->second;
rawtok = includetokens ? includetokens->cfront() : 0;
continue;
}
} else if (rawtok->str == IF || rawtok->str == IFDEF || rawtok->str == IFNDEF || rawtok->str == ELIF) {
if (!sameline(rawtok,rawtok->next)) {
simplecpp::Output out(files);
out.type = Output::SYNTAX_ERROR;
out.location = rawtok->location;
out.msg = "Syntax error in #" + rawtok->str;
if (outputList)
outputList->push_back(out);
output.clear();
return;
}
bool conditionIsTrue;
if (ifstates.top() == ALWAYS_FALSE || (ifstates.top() == ELSE_IS_TRUE && rawtok->str != ELIF))
conditionIsTrue = false;
else if (rawtok->str == IFDEF)
conditionIsTrue = (macros.find(rawtok->next->str) != macros.end());
else if (rawtok->str == IFNDEF)
conditionIsTrue = (macros.find(rawtok->next->str) == macros.end());
else { /*if (rawtok->str == IF || rawtok->str == ELIF)*/
TokenList expr(files);
for (const Token *tok = rawtok->next; tok && tok->location.sameline(rawtok->location); tok = tok->next) {
if (!tok->name) {
expr.push_back(new Token(*tok));
continue;
}
if (tok->str == DEFINED) {
tok = tok->next;
const bool par = (tok && tok->op == '(');
if (par)
tok = tok->next;
if (!tok)
break;
if (macros.find(tok->str) != macros.end())
expr.push_back(new Token("1", tok->location));
else
expr.push_back(new Token("0", tok->location));
if (tok && par)
tok = tok->next;
continue;
}
const Token *tmp = tok;
if (!preprocessToken(expr, &tmp, macros, files, outputList)) {
output.clear();
return;
}
}
try {
conditionIsTrue = (evaluate(expr, sizeOfType) != 0);
} catch (const std::exception &) {
Output out(rawtok->location.files);
out.type = Output::SYNTAX_ERROR;
out.location = rawtok->location;
out.msg = "failed to evaluate " + std::string(rawtok->str == IF ? "#if" : "#elif") + " condition";
if (outputList)
outputList->push_back(out);
output.clear();
return;
}
}
if (rawtok->str != ELIF) {
// push a new ifstate..
if (ifstates.top() != TRUE)
ifstates.push(ALWAYS_FALSE);
else
ifstates.push(conditionIsTrue ? TRUE : ELSE_IS_TRUE);
} else if (ifstates.top() == TRUE) {
ifstates.top() = ALWAYS_FALSE;
} else if (ifstates.top() == ELSE_IS_TRUE && conditionIsTrue) {
ifstates.top() = TRUE;
}
} else if (rawtok->str == ELSE) {
ifstates.top() = (ifstates.top() == ELSE_IS_TRUE) ? TRUE : ALWAYS_FALSE;
} else if (rawtok->str == ENDIF) {
if (ifstates.size() > 1U)
ifstates.pop();
} else if (rawtok->str == UNDEF) {
if (ifstates.top() == TRUE) {
const Token *tok = rawtok->next;
while (sameline(rawtok,tok) && tok->comment)
tok = tok->next;
if (sameline(rawtok, tok))
macros.erase(tok->str);
}
} else if (ifstates.top() == TRUE && rawtok->str == PRAGMA && rawtok->next && rawtok->next->str == ONCE && sameline(rawtok,rawtok->next)) {
pragmaOnce.insert(rawtok->location.file());
}
rawtok = gotoNextLine(rawtok);
continue;
}
if (ifstates.top() != TRUE) {
// drop code
rawtok = gotoNextLine(rawtok);
continue;
}
bool hash=false, hashhash=false;
if (rawtok->op == '#' && sameline(rawtok,rawtok->next)) {
if (rawtok->next->op != '#') {
hash = true;
rawtok = rawtok->next; // skip '#'
} else if (sameline(rawtok,rawtok->next->next)) {
hashhash = true;
rawtok = rawtok->next->next; // skip '#' '#'
}
}
const Location loc(rawtok->location);
TokenList tokens(files);
if (!preprocessToken(tokens, &rawtok, macros, files, outputList)) {
output.clear();
return;
}
if (hash || hashhash) {
std::string s;
for (const Token *hashtok = tokens.cfront(); hashtok; hashtok = hashtok->next)
s += hashtok->str;
if (hash)
output.push_back(new Token('\"' + s + '\"', loc));
else if (output.back())
output.back()->setstr(output.cback()->str + s);
else
output.push_back(new Token(s, loc));
} else {
output.takeTokens(tokens);
}
}
if (macroUsage) {
for (std::map<TokenString, simplecpp::Macro>::const_iterator macroIt = macros.begin(); macroIt != macros.end(); ++macroIt) {
const Macro &macro = macroIt->second;
const std::list<Location> &usage = macro.usage();
for (std::list<Location>::const_iterator usageIt = usage.begin(); usageIt != usage.end(); ++usageIt) {
MacroUsage mu(usageIt->files);
mu.macroName = macro.name();
mu.macroLocation = macro.defineLocation();
mu.useLocation = *usageIt;
macroUsage->push_back(mu);
}
}
}
}
void simplecpp::cleanup(std::map<std::string, TokenList*> &filedata) {
for (std::map<std::string, TokenList*>::iterator it = filedata.begin(); it != filedata.end(); ++it)
delete it->second;
filedata.clear();
}
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