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3281 lines (2850 loc) · 117 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "preprocessor.h"
#include "tokenize.h"
#include "token.h"
#include "path.h"
#include "errorlogger.h"
#include "settings.h"
#include <algorithm>
#include <sstream>
#include <fstream>
#include <cstdlib>
#include <cctype>
#include <vector>
#include <set>
#include <stack>
bool Preprocessor::missingIncludeFlag;
bool Preprocessor::missingSystemIncludeFlag;
char Preprocessor::macroChar = char(1);
Preprocessor::Preprocessor(Settings *settings, ErrorLogger *errorLogger) : _settings(settings), _errorLogger(errorLogger)
{
}
void Preprocessor::writeError(const std::string &fileName, const unsigned int linenr, ErrorLogger *errorLogger, const std::string &errorType, const std::string &errorText)
{
if (!errorLogger)
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = linenr;
loc.setfile(fileName);
locationList.push_back(loc);
errorLogger->reportErr(ErrorLogger::ErrorMessage(locationList,
Severity::error,
errorText,
errorType,
false));
}
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) {
unsigned char ch2 = (unsigned char)istr.get();
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;
}
// Concatenates a list of strings, inserting a separator between parts
static std::string join(const std::set<std::string>& list, char separator)
{
std::string s;
for (std::set<std::string>::const_iterator it = list.begin(); it != list.end(); ++it) {
if (!s.empty())
s += separator;
s += *it;
}
return s;
}
// Removes duplicate string portions separated by the specified separator
static std::string unify(const std::string &s, char separator)
{
std::set<std::string> parts;
std::string::size_type prevPos = 0;
for (std::string::size_type pos = 0; pos < s.length(); ++pos) {
if (s[pos] == separator) {
if (pos > prevPos)
parts.insert(s.substr(prevPos, pos - prevPos));
prevPos = pos + 1;
}
}
if (prevPos < s.length())
parts.insert(s.substr(prevPos));
return join(parts, separator);
}
bool Preprocessor::cplusplus(const Settings *settings, const std::string &filename)
{
const bool undef = settings && settings->userUndefs.find("__cplusplus") != settings->userUndefs.end();
const bool cpplang = settings && settings->enforcedLang == Settings::CPP;
const bool cppfile = (!settings || settings->enforcedLang == Settings::None) && Path::isCPP(filename);
return (!undef && (cpplang || cppfile));
}
/**
* Get cfgmap - a map of macro names and values
*/
static std::map<std::string,std::string> getcfgmap(const std::string &cfg, const Settings *settings, const std::string &filename)
{
std::map<std::string, std::string> cfgmap;
if (!cfg.empty()) {
std::string::size_type pos = 0;
for (;;) {
std::string::size_type pos2 = cfg.find_first_of(";=", pos);
if (pos2 == std::string::npos) {
cfgmap[cfg.substr(pos)] = "";
break;
}
if (cfg[pos2] == ';') {
cfgmap[cfg.substr(pos, pos2-pos)] = "";
} else {
std::string::size_type pos3 = pos2;
pos2 = cfg.find(";", pos2);
if (pos2 == std::string::npos) {
cfgmap[cfg.substr(pos, pos3-pos)] = cfg.substr(pos3 + 1);
break;
} else {
cfgmap[cfg.substr(pos, pos3-pos)] = cfg.substr(pos3 + 1, pos2 - pos3 - 1);
}
}
pos = pos2 + 1;
}
}
if (cfgmap.find("__cplusplus") == cfgmap.end() && Preprocessor::cplusplus(settings,filename))
cfgmap["__cplusplus"] = "1";
return cfgmap;
}
/** Just read the code into a string. Perform simple cleanup of the code */
std::string Preprocessor::read(std::istream &istr, const std::string &filename)
{
// The UTF-16 BOM is 0xfffe or 0xfeff.
unsigned int bom = 0;
if (istr.peek() >= 0xfe) {
bom = ((unsigned int)istr.get() << 8);
if (istr.peek() >= 0xfe)
bom |= (unsigned int)istr.get();
else
bom = 0; // allowed boms are 0/0xfffe/0xfeff
}
if (_settings && _settings->terminated())
return "";
if (_settings && _settings->checkConfiguration)
return readpreprocessor(istr,bom);
// ------------------------------------------------------------------------------------------
//
// handling <backslash><newline>
// when this is encountered the <backslash><newline> will be "skipped".
// on the next <newline>, extra newlines will be added
std::ostringstream code;
unsigned int newlines = 0;
for (unsigned char ch = readChar(istr,bom); istr.good(); ch = readChar(istr,bom)) {
// Replace assorted special chars with spaces..
if (((ch & 0x80) == 0) && (ch != '\n') && (std::isspace(ch) || std::iscntrl(ch)))
ch = ' ';
// <backslash><newline>..
// for gcc-compatibility the trailing spaces should be ignored
// for vs-compatibility the trailing spaces should be kept
// See tickets #640 and #1869
// The solution for now is to have a compiler-dependent behaviour.
if (ch == '\\') {
unsigned char chNext;
std::string spaces;
#ifdef __GNUC__
// gcc-compatibility: ignore spaces
for (;; spaces += ' ') {
chNext = (unsigned char)istr.peek();
if (chNext != '\n' && chNext != '\r' &&
(std::isspace(chNext) || std::iscntrl(chNext))) {
// Skip whitespace between <backslash> and <newline>
(void)readChar(istr,bom);
continue;
}
break;
}
#else
// keep spaces
chNext = (unsigned char)istr.peek();
#endif
if (chNext == '\n' || chNext == '\r') {
++newlines;
(void)readChar(istr,bom); // Skip the "<backslash><newline>"
} else {
code << "\\" << spaces;
}
} else {
code << char(ch);
// if there has been <backslash><newline> sequences, add extra newlines..
if (ch == '\n' && newlines > 0) {
code << std::string(newlines, '\n');
newlines = 0;
}
}
}
std::string result = code.str();
code.str("");
// ------------------------------------------------------------------------------------------
//
// Remove all comments..
result = removeComments(result, filename);
if (_settings && _settings->terminated())
return "";
// ------------------------------------------------------------------------------------------
//
// Clean up all preprocessor statements
result = preprocessCleanupDirectives(result);
if (_settings && _settings->terminated())
return "";
// ------------------------------------------------------------------------------------------
//
// Clean up preprocessor #if statements with Parentheses
result = removeParentheses(result);
if (_settings && _settings->terminated())
return "";
// Remove '#if 0' blocks
if (result.find("#if 0\n") != std::string::npos)
result = removeIf0(result);
if (_settings && _settings->terminated())
return "";
return result;
}
/** read preprocessor statements */
std::string Preprocessor::readpreprocessor(std::istream &istr, const unsigned int bom)
{
enum { NEWLINE, SPACE, PREPROCESSOR, BACKSLASH, OTHER } state = NEWLINE;
std::ostringstream code;
unsigned int newlines = 1;
unsigned char chPrev = ' ';
for (unsigned char ch = readChar(istr,bom); istr.good(); ch = readChar(istr,bom)) {
// Replace assorted special chars with spaces..
if (((ch & 0x80) == 0) && (ch != '\n') && (std::isspace(ch) || std::iscntrl(ch)))
ch = ' ';
if (ch == ' ' && chPrev == ' ')
continue;
if (state == PREPROCESSOR && chPrev == '/' && (ch == '/' || ch == '*'))
state = OTHER;
chPrev = ch;
if (ch == '\n') {
if (state != BACKSLASH) {
state = NEWLINE;
code << std::string(newlines, '\n');
newlines = 1;
} else {
++newlines;
state = PREPROCESSOR;
}
continue;
}
switch (state) {
case NEWLINE:
if (ch==' ')
state = SPACE;
else if (ch == '#') {
state = PREPROCESSOR;
code << ch;
} else
state = OTHER;
break;
case SPACE:
if (ch == '#') {
state = PREPROCESSOR;
code << ch;
} else if (ch != ' ')
state = OTHER;
break;
case PREPROCESSOR:
code << ch;
if (ch == '\\')
state = BACKSLASH;
break;
case BACKSLASH:
code << ch;
if (ch != ' ')
state = PREPROCESSOR;
break;
case OTHER:
break;
};
}
std::string result = preprocessCleanupDirectives(code.str());
result = removeParentheses(result);
return removeIf0(result);
}
std::string Preprocessor::preprocessCleanupDirectives(const std::string &processedFile)
{
std::ostringstream code;
std::istringstream sstr(processedFile);
std::string line;
while (std::getline(sstr, line)) {
// Trim lines..
if (!line.empty() && line[0] == ' ')
line.erase(0, line.find_first_not_of(" "));
if (!line.empty() && line[line.size()-1] == ' ')
line.erase(line.find_last_not_of(" ") + 1);
// Preprocessor
if (!line.empty() && line[0] == '#') {
enum {
ESC_NONE,
ESC_SINGLE,
ESC_DOUBLE
} escapeStatus = ESC_NONE;
char prev = ' '; // hack to make it skip spaces between # and the directive
code << "#";
std::string::const_iterator i = line.begin();
++i;
// need space.. #if( => #if (
bool needSpace = true;
while (i != line.end()) {
// disable esc-mode
if (escapeStatus != ESC_NONE) {
if (prev != '\\' && escapeStatus == ESC_SINGLE && *i == '\'') {
escapeStatus = ESC_NONE;
}
if (prev != '\\' && escapeStatus == ESC_DOUBLE && *i == '"') {
escapeStatus = ESC_NONE;
}
} else {
// enable esc-mode
if (escapeStatus == ESC_NONE && *i == '"')
escapeStatus = ESC_DOUBLE;
if (escapeStatus == ESC_NONE && *i == '\'')
escapeStatus = ESC_SINGLE;
}
// skip double whitespace between arguments
if (escapeStatus == ESC_NONE && prev == ' ' && *i == ' ') {
++i;
continue;
}
// Convert #if( to "#if ("
if (escapeStatus == ESC_NONE) {
if (needSpace) {
if (*i == '(' || *i == '!')
code << " ";
else if (!std::isalpha((unsigned char)*i))
needSpace = false;
}
if (*i == '#')
needSpace = true;
}
code << *i;
if (escapeStatus != ESC_NONE && prev == '\\' && *i == '\\') {
prev = ' ';
} else {
prev = *i;
}
++i;
}
if (escapeStatus != ESC_NONE) {
// unmatched quotes.. compiler should probably complain about this..
}
} else {
// Do not mess with regular code..
code << line;
}
code << (sstr.eof()?"":"\n");
}
return code.str();
}
static bool hasbom(const std::string &str)
{
return bool(str.size() >= 3 &&
static_cast<unsigned char>(str[0]) == 0xef &&
static_cast<unsigned char>(str[1]) == 0xbb &&
static_cast<unsigned char>(str[2]) == 0xbf);
}
// This wrapper exists because Sun's CC does not allow a static_cast
// from extern "C" int(*)(int) to int(*)(int).
static int tolowerWrapper(int c)
{
return std::tolower(c);
}
static bool isFallThroughComment(std::string comment)
{
// convert comment to lower case without whitespace
for (std::string::iterator i = comment.begin(); i != comment.end();) {
if (std::isspace(static_cast<unsigned char>(*i)))
i = comment.erase(i);
else
++i;
}
std::transform(comment.begin(), comment.end(), comment.begin(), tolowerWrapper);
return comment.find("fallthr") != std::string::npos ||
comment.find("fallsthr") != std::string::npos ||
comment.find("fall-thr") != std::string::npos ||
comment.find("dropthr") != std::string::npos ||
comment.find("passthr") != std::string::npos ||
comment.find("nobreak") != std::string::npos ||
comment == "fall";
}
std::string Preprocessor::removeComments(const std::string &str, const std::string &filename)
{
// For the error report
unsigned int lineno = 1;
// handling <backslash><newline>
// when this is encountered the <backslash><newline> will be "skipped".
// on the next <newline>, extra newlines will be added
unsigned int newlines = 0;
std::ostringstream code;
unsigned char previous = 0;
bool inPreprocessorLine = false;
std::vector<std::string> suppressionIDs;
bool fallThroughComment = false;
for (std::string::size_type i = hasbom(str) ? 3U : 0U; i < str.length(); ++i) {
unsigned char ch = static_cast<unsigned char>(str[i]);
if (ch & 0x80) {
std::ostringstream errmsg;
errmsg << "(character code = 0x" << std::hex << (int(ch) & 0xff) << ")";
std::string info = errmsg.str();
errmsg.str("");
errmsg << "The code contains unhandled characters " << info << ". Checking continues, but do not expect valid results.\n"
<< "The code contains characters that are unhandled " << info << ". Neither unicode nor extended ASCII are supported. Checking continues, but do not expect valid results.";
writeError(filename, lineno, _errorLogger, "unhandledCharacters", errmsg.str());
}
if (_settings && _settings->terminated())
return "";
if (str.compare(i, 7, "#error ") == 0 || str.compare(i, 9, "#warning ") == 0) {
if (str.compare(i, 6, "#error") == 0)
code << "#error";
i = str.find("\n", i);
if (i == std::string::npos)
break;
--i;
continue;
}
// First skip over any whitespace that may be present
if (std::isspace(ch)) {
if (ch == ' ' && previous == ' ') {
// Skip double white space
} else {
code << char(ch);
previous = ch;
}
// if there has been <backslash><newline> sequences, add extra newlines..
if (ch == '\n') {
if (previous != '\\')
inPreprocessorLine = false;
++lineno;
if (newlines > 0) {
code << std::string(newlines, '\n');
newlines = 0;
previous = '\n';
}
}
continue;
}
// Remove comments..
if (str.compare(i, 2, "//") == 0) {
std::size_t commentStart = i + 2;
i = str.find('\n', i);
if (i == std::string::npos)
break;
std::string comment(str, commentStart, i - commentStart);
if (_settings && _settings->_inlineSuppressions) {
std::istringstream iss(comment);
std::string word;
iss >> word;
if (word == "cppcheck-suppress") {
iss >> word;
if (iss)
suppressionIDs.push_back(word);
}
}
if (isFallThroughComment(comment)) {
fallThroughComment = true;
}
code << "\n";
previous = '\n';
++lineno;
} else if (str.compare(i, 2, "/*") == 0) {
std::size_t commentStart = i + 2;
unsigned char chPrev = 0;
++i;
while (i < str.length() && (chPrev != '*' || ch != '/')) {
chPrev = ch;
++i;
ch = static_cast<unsigned char>(str[i]);
if (ch == '\n') {
++newlines;
++lineno;
}
}
std::string comment(str, commentStart, i - commentStart - 1);
if (isFallThroughComment(comment)) {
fallThroughComment = true;
}
if (_settings && _settings->_inlineSuppressions) {
std::istringstream iss(comment);
std::string word;
iss >> word;
if (word == "cppcheck-suppress") {
iss >> word;
if (iss)
suppressionIDs.push_back(word);
}
}
} else if ((i == 0 || std::isspace((unsigned char)str[i-1])) && str.compare(i, 5, "__asm") == 0) {
while (i < str.size() && (std::isalpha((unsigned char)str[i]) || str[i] == '_'))
code << str[i++];
while (i < str.size() && std::isspace((unsigned char)str[i]))
code << str[i++];
if (str[i] == '{') {
// Ticket 4873: Extract comments from the __asm / __asm__'s content
std::string asmBody;
while (i < str.size() && str[i] != '}') {
if (str[i] == ';') {
std::string::size_type backslashN = str.find("\n", i);
if (backslashN != std::string::npos) // Ticket #4922: Don't go in infinite loop or crash if there is no '\n'
i = backslashN;
}
asmBody += str[i++];
}
code << removeComments(asmBody, filename);
code << '}';
} else
--i;
} else if (ch == '#' && previous == '\n') {
code << ch;
previous = ch;
inPreprocessorLine = true;
// Add any pending inline suppressions that have accumulated.
if (!suppressionIDs.empty()) {
if (_settings != nullptr) {
// Add the suppressions.
for (std::size_t j = 0; j < suppressionIDs.size(); ++j) {
const std::string errmsg(_settings->nomsg.addSuppression(suppressionIDs[j], filename, lineno));
if (!errmsg.empty()) {
writeError(filename, lineno, _errorLogger, "cppcheckError", errmsg);
}
}
}
suppressionIDs.clear();
}
} else {
if (!inPreprocessorLine) {
// Not whitespace, not a comment, and not preprocessor.
// Must be code here!
// First check for a "fall through" comment match, but only
// add a suppression if the next token is 'case' or 'default'
if (_settings && _settings->isEnabled("style") && _settings->experimental && fallThroughComment) {
std::string::size_type j = str.find_first_not_of("abcdefghijklmnopqrstuvwxyz", i);
std::string tok = str.substr(i, j - i);
if (tok == "case" || tok == "default")
suppressionIDs.push_back("switchCaseFallThrough");
fallThroughComment = false;
}
// Add any pending inline suppressions that have accumulated.
if (!suppressionIDs.empty()) {
if (_settings != nullptr) {
// Relative filename
std::string relativeFilename(filename);
if (_settings->_relativePaths) {
for (std::size_t j = 0U; j < _settings->_basePaths.size(); ++j) {
const std::string bp = _settings->_basePaths[j] + "/";
if (relativeFilename.compare(0,bp.size(),bp)==0) {
relativeFilename = relativeFilename.substr(bp.size());
}
}
}
// Add the suppressions.
for (std::size_t j = 0; j < suppressionIDs.size(); ++j) {
const std::string errmsg(_settings->nomsg.addSuppression(suppressionIDs[j], relativeFilename, lineno));
if (!errmsg.empty()) {
writeError(filename, lineno, _errorLogger, "cppcheckError", errmsg);
}
}
}
suppressionIDs.clear();
}
}
// String or char constants..
if (ch == '\"' || ch == '\'') {
code << char(ch);
char chNext;
do {
++i;
chNext = str[i];
if (chNext == '\\') {
++i;
char chSeq = str[i];
if (chSeq == '\n')
++newlines;
else {
code << chNext;
code << chSeq;
previous = static_cast<unsigned char>(chSeq);
}
} else {
code << chNext;
previous = static_cast<unsigned char>(chNext);
}
} while (i < str.length() && chNext != ch && chNext != '\n');
}
// Rawstring..
else if (str.compare(i,2,"R\"")==0) {
std::string delim;
for (std::string::size_type i2 = i+2; i2 < str.length(); ++i2) {
if (i2 > 16 ||
std::isspace(str[i2]) ||
std::iscntrl(str[i2]) ||
str[i2] == ')' ||
str[i2] == '\\') {
delim = " ";
break;
} else if (str[i2] == '(')
break;
delim += str[i2];
}
const std::string::size_type endpos = str.find(")" + delim + "\"", i);
if (delim != " " && endpos != std::string::npos) {
unsigned int rawstringnewlines = 0;
code << '\"';
for (std::string::size_type p = i + 3 + delim.size(); p < endpos; ++p) {
if (str[p] == '\n') {
rawstringnewlines++;
code << "\\n";
} else if (std::iscntrl((unsigned char)str[p]) ||
std::isspace((unsigned char)str[p])) {
code << " ";
} else if (str[p] == '\"' || str[p] == '\'') {
code << "\\" << (char)str[p];
} else {
code << (char)str[p];
}
}
code << "\"";
if (rawstringnewlines > 0)
code << std::string(rawstringnewlines, '\n');
i = endpos + delim.size() + 1;
} else {
code << "R";
previous = 'R';
}
} else {
code << char(ch);
previous = ch;
}
}
}
return code.str();
}
std::string Preprocessor::removeIf0(const std::string &code)
{
std::ostringstream ret;
std::istringstream istr(code);
std::string line;
while (std::getline(istr,line)) {
ret << line << "\n";
if (line == "#if 0") {
// goto the end of the '#if 0' block
unsigned int level = 1;
bool in = false;
while (level > 0 && std::getline(istr,line)) {
if (line.compare(0,3,"#if") == 0)
++level;
else if (line == "#endif")
--level;
else if ((line == "#else") || (line.compare(0, 5, "#elif") == 0)) {
if (level == 1)
in = true;
} else {
if (in)
ret << line << "\n";
else
// replace code within '#if 0' block with empty lines
ret << "\n";
continue;
}
ret << line << "\n";
}
}
}
return ret.str();
}
std::string Preprocessor::removeParentheses(const std::string &str)
{
if (str.find("\n#if") == std::string::npos && str.compare(0, 3, "#if") != 0)
return str;
std::istringstream istr(str);
std::ostringstream ret;
std::string line;
while (std::getline(istr, line)) {
if (line.compare(0, 3, "#if") == 0 || line.compare(0, 5, "#elif") == 0) {
std::string::size_type pos;
pos = 0;
while ((pos = line.find(" (", pos)) != std::string::npos)
line.erase(pos, 1);
pos = 0;
while ((pos = line.find("( ", pos)) != std::string::npos)
line.erase(pos + 1, 1);
pos = 0;
while ((pos = line.find(" )", pos)) != std::string::npos)
line.erase(pos, 1);
pos = 0;
while ((pos = line.find(") ", pos)) != std::string::npos)
line.erase(pos + 1, 1);
// Remove inner parentheses "((..))"..
pos = 0;
while ((pos = line.find("((", pos)) != std::string::npos) {
++pos;
std::string::size_type pos2 = line.find_first_of("()", pos + 1);
if (pos2 != std::string::npos && line[pos2] == ')') {
line.erase(pos2, 1);
line.erase(pos, 1);
}
}
// "#if(A) => #if A", but avoid "#if (defined A) || defined (B)"
if ((line.compare(0, 4, "#if(") == 0 || line.compare(0, 6, "#elif(") == 0) &&
line[line.length() - 1] == ')') {
int ind = 0;
for (std::string::size_type i = 0; i < line.length(); ++i) {
if (line[i] == '(')
++ind;
else if (line[i] == ')') {
--ind;
if (ind == 0) {
if (i == line.length() - 1) {
line[line.find('(')] = ' ';
line.erase(line.length() - 1);
}
break;
}
}
}
}
if (line.compare(0, 4, "#if(") == 0)
line.insert(3, " ");
else if (line.compare(0, 6, "#elif(") == 0)
line.insert(5, " ");
}
ret << line << "\n";
}
return ret.str();
}
void Preprocessor::removeAsm(std::string &str)
{
std::string::size_type pos = 0;
while ((pos = str.find("#asm\n", pos)) != std::string::npos) {
str.replace(pos, 4, "asm(");
std::string::size_type pos2 = str.find("#endasm", pos);
if (pos2 != std::string::npos) {
str.replace(pos2, 7, ");");
pos = pos2;
}
}
}
void Preprocessor::preprocess(std::istream &istr, std::map<std::string, std::string> &result, const std::string &filename, const std::list<std::string> &includePaths)
{
std::list<std::string> configs;
std::string data;
preprocess(istr, data, configs, filename, includePaths);
for (std::list<std::string>::const_iterator it = configs.begin(); it != configs.end(); ++it) {
if (_settings && (_settings->userUndefs.find(*it) == _settings->userUndefs.end())) {
result[ *it ] = getcode(data, *it, filename);
}
}
}
std::string Preprocessor::removeSpaceNearNL(const std::string &str)
{
std::string tmp;
char prev = 0;
for (std::size_t i = 0; i < str.size(); i++) {
if (str[i] == ' ' &&
((i > 0 && prev == '\n') ||
(i + 1 < str.size() && str[i+1] == '\n')
)
) {
// Ignore space that has new line in either side of it
} else {
tmp.append(1, str[i]);
prev = str[i];
}
}
return tmp;
}
std::string Preprocessor::replaceIfDefined(const std::string &str) const
{
std::string ret(str);
std::string::size_type pos;
pos = 0;
while ((pos = ret.find("#if defined(", pos)) != std::string::npos) {
std::string::size_type pos2 = ret.find(")", pos + 9);
if (pos2 > ret.length() - 1)
break;
if (ret[pos2+1] == '\n') {
ret.erase(pos2, 1);
ret.erase(pos + 3, 9);
ret.insert(pos + 3, "def ");
}
++pos;
if (_settings && _settings->terminated())
return "";
}
pos = 0;
while ((pos = ret.find("#if !defined(", pos)) != std::string::npos) {
std::string::size_type pos2 = ret.find(")", pos + 9);
if (pos2 > ret.length() - 1)
break;
if (ret[pos2+1] == '\n') {
ret.erase(pos2, 1);
ret.erase(pos + 3, 10);
ret.insert(pos + 3, "ndef ");
}
++pos;
if (_settings && _settings->terminated())
return "";
}
pos = 0;
while ((pos = ret.find("#elif defined(", pos)) != std::string::npos) {
std::string::size_type pos2 = ret.find(")", pos + 9);
if (pos2 > ret.length() - 1)
break;
if (ret[pos2+1] == '\n') {
ret.erase(pos2, 1);
ret.erase(pos + 6, 8);
}
++pos;
if (_settings && _settings->terminated())
return "";
}
return ret;
}
void Preprocessor::preprocessWhitespaces(std::string &processedFile)
{
// Replace all tabs with spaces..
std::replace(processedFile.begin(), processedFile.end(), '\t', ' ');
// Remove all indentation..
if (!processedFile.empty() && processedFile[0] == ' ')
processedFile.erase(0, processedFile.find_first_not_of(" "));
// Remove space characters that are after or before new line character
processedFile = removeSpaceNearNL(processedFile);
}
void Preprocessor::preprocess(std::istream &srcCodeStream, std::string &processedFile, std::list<std::string> &resultConfigurations, const std::string &filename, const std::list<std::string> &includePaths)
{
std::string forcedIncludes;
if (file0.empty())
file0 = filename;
processedFile = read(srcCodeStream, filename);
if (_settings) {
for (std::list<std::string>::iterator it = _settings->userIncludes.begin();
it != _settings->userIncludes.end();
++it) {
std::string cur = *it;
// try to open file
std::ifstream fin;
fin.open(cur.c_str());
if (!fin.is_open()) {
missingInclude(cur,
1,
cur,
UserHeader
);
continue;
}
const std::string fileData = read(fin, filename);
fin.close();
forcedIncludes =
forcedIncludes +
"#file \"" + cur + "\"\n" +
"#line 1\n" +
fileData + "\n" +
"#endfile\n"
;
}
for (std::vector<std::string>::iterator it = _settings->library.defines.begin();
it != _settings->library.defines.end();