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2464 lines (2185 loc) · 91.2 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/>.
*/
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
#define NOMINMAX
#endif
#include "simplecpp.h"
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <exception>
#include <fstream>
#include <iostream>
#include <limits>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <utility>
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
#include <windows.h>
#undef ERROR
#undef TRUE
#define SIMPLECPP_WINDOWS
#endif
static bool isHex(const std::string &s)
{
return s.size()>2 && (s.compare(0,2,"0x")==0 || s.compare(0,2,"0X")==0);
}
static const simplecpp::TokenString DEFINE("define");
static const simplecpp::TokenString UNDEF("undef");
static const simplecpp::TokenString INCLUDE("include");
static const simplecpp::TokenString ERROR("error");
static const simplecpp::TokenString WARNING("warning");
static const simplecpp::TokenString IF("if");
static const simplecpp::TokenString IFDEF("ifdef");
static const simplecpp::TokenString IFNDEF("ifndef");
static const simplecpp::TokenString DEFINED("defined");
static const simplecpp::TokenString ELSE("else");
static const simplecpp::TokenString ELIF("elif");
static const simplecpp::TokenString ENDIF("endif");
static const simplecpp::TokenString PRAGMA("pragma");
static const simplecpp::TokenString ONCE("once");
template<class T> static std::string toString(T t)
{
std::ostringstream ostr;
ostr << t;
return ostr.str();
}
static long long stringToLL(const std::string &s)
{
long long ret;
const bool hex = isHex(s);
std::istringstream istr(hex ? s.substr(2) : s);
if (hex)
istr >> std::hex;
istr >> ret;
return ret;
}
static unsigned long long stringToULL(const std::string &s)
{
unsigned long long ret;
const bool hex = isHex(s);
std::istringstream istr(hex ? s.substr(2) : s);
if (hex)
istr >> std::hex;
istr >> ret;
return ret;
}
static bool startsWith(const std::string &str, const std::string &s)
{
return (str.size() >= s.size() && str.compare(0, s.size(), s) == 0);
}
static 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);
}
static 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 = 1;
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 (; 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;
}
static 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 < ' ' && ch != '\t' && ch != '\n' && ch != '\r')
ch = ' ';
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 != '\n') {
delim += ch;
ch = readChar(istr,bom);
}
if (!istr.good() || 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.adjust(currentToken);
if (currentToken.find_first_of("\r\n") == std::string::npos)
location.col += 2 + 2 * delim.size();
else
location.col += 1 + delim.size();
continue;
}
currentToken = readUntil(istr,location,ch,ch,outputList);
if (currentToken.size() < 2U)
// TODO report
return;
std::string s = currentToken;
std::string::size_type pos;
while ((pos = s.find_first_of("\r\n")) != std::string::npos) {
s.erase(pos,1);
}
push_back(new Token(s, location)); // push string without newlines
location.adjust(currentToken);
continue;
}
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);
}
}
static bool isFloatSuffix(const simplecpp::Token *tok)
{
if (!tok || tok->str.size() != 1U)
return false;
const char c = std::tolower(tok->str[0]);
return c == 'f' || c == 'l';
}
void simplecpp::TokenList::combineOperators()
{
for (Token *tok = front(); tok; tok = tok->next) {
if (tok->op == '.') {
if (tok->previous && tok->previous->op == '.')
continue;
if (tok->next && tok->next->op == '.')
continue;
// float literals..
if (tok->previous && tok->previous->number) {
tok->setstr(tok->previous->str + '.');
deleteToken(tok->previous);
if (isFloatSuffix(tok->next) || (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 && !isHex(tok->str) && (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);
}
}
}
static const std::string NOT("not");
void simplecpp::TokenList::constFoldUnaryNotPosNeg(simplecpp::Token *tok)
{
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);
}
}
static const std::string NOTEQ("not_eq");
void simplecpp::TokenList::constFoldComparison(Token *tok)
{
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);
}
}
static const std::string BITAND("bitand");
static const std::string BITOR("bitor");
static const std::string XOR("xor");
void simplecpp::TokenList::constFoldBitwise(Token *tok)
{
Token * const tok1 = tok;
for (const char *op = "&^|"; *op; op++) {
const 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);
}
}
}
static const std::string AND("and");
static const std::string OR("or");
void simplecpp::TokenList::constFoldLogicalOp(Token *tok)
{
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->next || !tok->next->next)
throw std::runtime_error("invalid expression");
if (!tok->previous->number)
continue;
if (tok->next->next->op != ':')
continue;
Token * const condTok = tok->previous;
Token * const trueTok = tok->next;
Token * const falseTok = trueTok->next->next;
if (!falseTok)
throw std::runtime_error("invalid expression");
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;
bool backslash = false;
char ch = 0;
while (ch != end && ch != '\r' && ch != '\n' && istr.good()) {
ch = (unsigned char)istr.get();
if (backslash && ch == '\n') {
ch = 0;
backslash = false;
continue;
}
backslash = false;
ret += ch;
if (ch == '\\') {
const char next = (unsigned char)istr.get();
if (next == '\r' || next == '\n') {
ret.erase(ret.size()-1U);
backslash = (next == '\r');
}
ret += next;
}
}
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) : nameTokDef(NULL), variadic(false), valueToken(NULL), endToken(NULL), files(f), tokenListDefine(f) {}
Macro(const Token *tok, std::vector<std::string> &f) : nameTokDef(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");
const Token * const hashtok = tok;
tok = tok->next;
if (!tok || tok->str != DEFINE)
throw std::runtime_error("bad macro syntax");
tok = tok->next;
if (!tok || !tok->name || !sameline(hashtok,tok))
throw std::runtime_error("bad macro syntax");
if (!parseDefine(tok))
throw std::runtime_error("bad macro syntax");
}