cppcheck/lib/library.h

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/*
* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2020 Cppcheck team.
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*
* 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/>.
*/
//---------------------------------------------------------------------------
#ifndef libraryH
#define libraryH
//---------------------------------------------------------------------------
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#include "config.h"
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#include "errorlogger.h"
#include "mathlib.h"
#include "standards.h"
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#include <cstddef>
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#include <map>
#include <set>
#include <string>
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#include <utility>
#include <vector>
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class Token;
namespace tinyxml2 {
class XMLDocument;
class XMLElement;
}
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/// @addtogroup Core
/// @{
/**
* @brief Library definitions handling
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*/
class CPPCHECKLIB Library {
friend class TestSymbolDatabase; // For testing only
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public:
Library();
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enum ErrorCode { OK, FILE_NOT_FOUND, BAD_XML, UNKNOWN_ELEMENT, MISSING_ATTRIBUTE, BAD_ATTRIBUTE_VALUE, UNSUPPORTED_FORMAT, DUPLICATE_PLATFORM_TYPE, PLATFORM_TYPE_REDEFINED };
class Error {
public:
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Error() : errorcode(OK) {}
explicit Error(ErrorCode e) : errorcode(e) {}
template<typename T>
Error(ErrorCode e, T&& r) : errorcode(e), reason(r) {}
ErrorCode errorcode;
std::string reason;
};
Error load(const char exename [], const char path []);
Error load(const tinyxml2::XMLDocument &doc);
/** this is primarily meant for unit tests. it only returns true/false */
bool loadxmldata(const char xmldata[], std::size_t len);
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struct AllocFunc {
int groupId;
int arg;
enum class BufferSize {none,malloc,calloc,strdup};
BufferSize bufferSize;
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int bufferSizeArg1;
int bufferSizeArg2;
int reallocArg;
};
/** get allocation info for function */
const AllocFunc* getAllocFuncInfo(const Token *tok) const;
/** get deallocation info for function */
const AllocFunc* getDeallocFuncInfo(const Token *tok) const;
/** get reallocation info for function */
const AllocFunc* getReallocFuncInfo(const Token *tok) const;
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/** get allocation id for function */
int getAllocId(const Token *tok, int arg) const;
/** get deallocation id for function */
int getDeallocId(const Token *tok, int arg) const;
/** get reallocation id for function */
int getReallocId(const Token *tok, int arg) const;
/** get allocation info for function by name (deprecated, use other alloc) */
const AllocFunc* getAllocFuncInfo(const char name[]) const {
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return getAllocDealloc(mAlloc, name);
}
/** get deallocation info for function by name (deprecated, use other alloc) */
const AllocFunc* getDeallocFuncInfo(const char name[]) const {
return getAllocDealloc(mDealloc, name);
}
/** get allocation id for function by name (deprecated, use other alloc) */
int allocId(const char name[]) const {
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const AllocFunc* af = getAllocDealloc(mAlloc, name);
return af ? af->groupId : 0;
}
/** get deallocation id for function by name (deprecated, use other alloc) */
int deallocId(const char name[]) const {
const AllocFunc* af = getAllocDealloc(mDealloc, name);
return af ? af->groupId : 0;
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}
/** set allocation id for function */
void setalloc(const std::string &functionname, int id, int arg) {
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mAlloc[functionname].groupId = id;
mAlloc[functionname].arg = arg;
}
void setdealloc(const std::string &functionname, int id, int arg) {
mDealloc[functionname].groupId = id;
mDealloc[functionname].arg = arg;
}
void setrealloc(const std::string &functionname, int id, int arg, int reallocArg = 1) {
mRealloc[functionname].groupId = id;
mRealloc[functionname].arg = arg;
mRealloc[functionname].reallocArg = reallocArg;
}
/** add noreturn function setting */
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void setnoreturn(const std::string& funcname, bool noreturn) {
mNoReturn[funcname] = noreturn;
}
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/** is allocation type memory? */
static bool ismemory(const int id) {
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return ((id > 0) && ((id & 1) == 0));
}
static bool ismemory(const AllocFunc* const func) {
return ((func->groupId > 0) && ((func->groupId & 1) == 0));
}
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/** is allocation type resource? */
static bool isresource(const int id) {
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return ((id > 0) && ((id & 1) == 1));
}
static bool isresource(const AllocFunc* const func) {
return ((func->groupId > 0) && ((func->groupId & 1) == 1));
}
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bool formatstr_function(const Token* ftok) const;
int formatstr_argno(const Token* ftok) const;
bool formatstr_scan(const Token* ftok) const;
bool formatstr_secure(const Token* ftok) const;
struct WarnInfo {
std::string message;
Standards standards;
Severity::SeverityType severity;
};
std::map<std::string, WarnInfo> functionwarn;
const WarnInfo* getWarnInfo(const Token* ftok) const;
// returns true if ftok is not a library function
bool isNotLibraryFunction(const Token *ftok) const;
bool matchArguments(const Token *ftok, const std::string &functionName) const;
bool isUseRetVal(const Token* ftok) const;
const std::string& returnValue(const Token *ftok) const;
const std::string& returnValueType(const Token *ftok) const;
int returnValueContainer(const Token *ftok) const;
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std::vector<MathLib::bigint> unknownReturnValues(const Token *ftok) const;
bool isnoreturn(const Token *ftok) const;
bool isnotnoreturn(const Token *ftok) const;
bool isScopeNoReturn(const Token *end, std::string *unknownFunc) const;
class Container {
public:
Container() :
type_templateArgNo(-1),
size_templateArgNo(-1),
arrayLike_indexOp(false),
stdStringLike(false),
stdAssociativeLike(false),
opLessAllowed(true),
hasInitializerListConstructor(false),
unstableErase(false),
unstableInsert(false) {
}
enum class Action {
RESIZE, CLEAR, PUSH, POP, FIND, INSERT, ERASE, CHANGE_CONTENT, CHANGE, CHANGE_INTERNAL,
NO_ACTION
};
enum class Yield {
AT_INDEX, ITEM, BUFFER, BUFFER_NT, START_ITERATOR, END_ITERATOR, ITERATOR, SIZE, EMPTY,
NO_YIELD
};
struct Function {
Action action;
Yield yield;
};
std::string startPattern, startPattern2, endPattern, itEndPattern;
std::map<std::string, Function> functions;
int type_templateArgNo;
int size_templateArgNo;
bool arrayLike_indexOp;
bool stdStringLike;
bool stdAssociativeLike;
bool opLessAllowed;
bool hasInitializerListConstructor;
bool unstableErase;
bool unstableInsert;
Action getAction(const std::string& function) const {
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const std::map<std::string, Function>::const_iterator i = functions.find(function);
if (i != functions.end())
return i->second.action;
return Action::NO_ACTION;
}
Yield getYield(const std::string& function) const {
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const std::map<std::string, Function>::const_iterator i = functions.find(function);
if (i != functions.end())
return i->second.yield;
return Yield::NO_YIELD;
}
};
std::map<std::string, Container> containers;
const Container* detectContainer(const Token* typeStart, bool iterator = false) const;
class ArgumentChecks {
public:
ArgumentChecks() :
notbool(false),
notnull(false),
notuninit(-1),
formatstr(false),
strz(false),
optional(false),
variadic(false),
iteratorInfo(),
direction(Direction::DIR_UNKNOWN) {
}
bool notbool;
bool notnull;
int notuninit;
bool formatstr;
bool strz;
bool optional;
bool variadic;
std::string valid;
class IteratorInfo {
public:
IteratorInfo() : container(0), it(false), first(false), last(false) {}
int container;
bool it;
bool first;
bool last;
};
IteratorInfo iteratorInfo;
class MinSize {
public:
enum Type { NONE, STRLEN, ARGVALUE, SIZEOF, MUL, VALUE };
MinSize(Type t, int a) : type(t), arg(a), arg2(0), value(0) {}
Type type;
int arg;
int arg2;
long long value;
};
std::vector<MinSize> minsizes;
enum class Direction {
DIR_IN, ///< Input to called function. Data is treated as read-only.
DIR_OUT, ///< Output to caller. Data is passed by reference or address and is potentially written.
DIR_INOUT, ///< Input to called function, and output to caller. Data is passed by reference or address and is potentially modified.
DIR_UNKNOWN ///< direction not known / specified
};
Direction direction;
};
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struct Function {
std::map<int, ArgumentChecks> argumentChecks; // argument nr => argument data
bool use;
bool leakignore;
bool isconst;
bool ispure;
bool useretval;
bool ignore; // ignore functions/macros from a library (gtk, qt etc)
bool formatstr;
bool formatstr_scan;
bool formatstr_secure;
Function() : use(false), leakignore(false), isconst(false), ispure(false), useretval(false), ignore(false), formatstr(false), formatstr_scan(false), formatstr_secure(false) {}
};
std::map<std::string, Function> functions;
bool isUse(const std::string& functionName) const;
bool isLeakIgnore(const std::string& functionName) const;
bool isFunctionConst(const std::string& functionName, bool pure) const;
bool isFunctionConst(const Token *ftok) const;
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bool isboolargbad(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg && arg->notbool;
}
bool isnullargbad(const Token *ftok, int argnr) const;
bool isuninitargbad(const Token *ftok, int argnr, int indirect = 0) const;
bool isargformatstr(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg && arg->formatstr;
}
bool isargstrz(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg && arg->strz;
}
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bool isIntArgValid(const Token *ftok, int argnr, const MathLib::bigint argvalue) const;
bool isFloatArgValid(const Token *ftok, int argnr, double argvalue) const;
const std::string& validarg(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg ? arg->valid : emptyString;
}
struct InvalidArgValue {
enum Type {le, lt, eq, ge, gt, range} type;
std::string op1;
std::string op2;
bool isInt() const {
return MathLib::isInt(op1);
}
};
static std::vector<InvalidArgValue> getInvalidArgValues(const std::string &validExpr);
const ArgumentChecks::IteratorInfo *getArgIteratorInfo(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg && arg->iteratorInfo.it ? &arg->iteratorInfo : nullptr;
}
bool hasminsize(const Token *ftok) const;
const std::vector<ArgumentChecks::MinSize> *argminsizes(const Token *ftok, int argnr) const {
const ArgumentChecks *arg = getarg(ftok, argnr);
return arg ? &arg->minsizes : nullptr;
}
ArgumentChecks::Direction getArgDirection(const Token* ftok, int argnr) const;
bool markupFile(const std::string &path) const;
bool processMarkupAfterCode(const std::string &path) const;
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const std::set<std::string> &markupExtensions() const {
return mMarkupExtensions;
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}
bool reportErrors(const std::string &path) const;
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lib: fix a bunch of warnings about differing function arguments in definition and declaration. [lib/token.h:72] -> [lib/token.cpp:36]: (style, inconclusive) Function 'Token' argument 1 names different: declaration 'tokensBack' definition 't'. [lib/token.h:445] -> [lib/token.cpp:497]: (style, inconclusive) Function 'multiCompare' argument 1 names different: declaration 'needle' definition 'tok'. [lib/checkio.h:73] -> [lib/checkio.cpp:1385]: (style, inconclusive) Function 'ArgumentInfo' argument 3 names different: declaration 'isCPP' definition '_isCPP'. [lib/checkother.h:216] -> [lib/checkother.cpp:2136]: (style, inconclusive) Function 'checkComparisonFunctionIsAlwaysTrueOrFalseError' argument 2 names different: declaration 'strFunctionName' definition 'functionName'. [lib/errorlogger.h:214] -> [lib/errorlogger.cpp:51]: (style, inconclusive) Function 'ErrorMessage' argument 2 names different: declaration 'file0' definition 'file0_'. [lib/errorlogger.h:215] -> [lib/errorlogger.cpp:65]: (style, inconclusive) Function 'ErrorMessage' argument 2 names different: declaration 'file0' definition 'file0_'. [lib/library.h:327] -> [lib/library.cpp:1043]: (style, inconclusive) Function 'ignorefunction' argument 1 names different: declaration 'function' definition 'functionName'. [lib/mathlib.h:112] -> [lib/mathlib.cpp:1275]: (style, inconclusive) Function 'isNullValue' argument 1 names different: declaration 'tok' definition 'str'. [lib/preprocessor.h:91] -> [lib/preprocessor.cpp:122]: (style, inconclusive) Function 'setDirectives' argument 1 names different: declaration 'tokens' definition 'tokens1'. [lib/symboldatabase.h:860] -> [lib/symboldatabase.cpp:1801]: (style, inconclusive) Function 'argsMatch' argument 1 names different: declaration 'info' definition 'scope'. [lib/symboldatabase.h:1171] -> [lib/symboldatabase.cpp:2048]: (style, inconclusive) Function 'addClassFunction' argument 1 names different: declaration 'info' definition 'scope'. [lib/symboldatabase.h:1174] -> [lib/symboldatabase.cpp:2208]: (style, inconclusive) Function 'addNewFunction' argument 1 names different: declaration 'info' definition 'scope'. [lib/symboldatabase.h:1090] -> [lib/symboldatabase.cpp:3648]: (style, inconclusive) Function 'findVariableType' argument 2 names different: declaration 'type' definition 'typeTok'. [lib/symboldatabase.h:1101] -> [lib/symboldatabase.cpp:4308]: (style, inconclusive) Function 'findType' argument 1 names different: declaration 'tok' definition 'startTok'. [lib/symboldatabase.h:1176] -> [lib/symboldatabase.cpp:4349]: (style, inconclusive) Function 'findTypeInNested' argument 1 names different: declaration 'tok' definition 'startTok'. [lib/symboldatabase.h:1193] -> [lib/symboldatabase.cpp:4501]: (style, inconclusive) Function 'setValueType' argument 2 names different: declaration 'enumerators' definition 'enumerator'. [lib/path.h:159] -> [lib/path.cpp:247]: (style, inconclusive) Function 'isCPP' argument 1 names different: declaration 'extensionInLowerCase' definition 'path'. [lib/path.h:145] -> [lib/path.cpp:266]: (style, inconclusive) Function 'acceptFile' argument 1 names different: declaration 'filename' definition 'path'.
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bool ignorefunction(const std::string &functionName) const;
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bool isexecutableblock(const std::string &file, const std::string &token) const;
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int blockstartoffset(const std::string &file) const;
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const std::string& blockstart(const std::string &file) const;
const std::string& blockend(const std::string &file) const;
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bool iskeyword(const std::string &file, const std::string &keyword) const;
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bool isexporter(const std::string &prefix) const {
return mExporters.find(prefix) != mExporters.end();
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}
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bool isexportedprefix(const std::string &prefix, const std::string &token) const {
const std::map<std::string, ExportedFunctions>::const_iterator it = mExporters.find(prefix);
return (it != mExporters.end() && it->second.isPrefix(token));
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}
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bool isexportedsuffix(const std::string &prefix, const std::string &token) const {
const std::map<std::string, ExportedFunctions>::const_iterator it = mExporters.find(prefix);
return (it != mExporters.end() && it->second.isSuffix(token));
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}
bool isimporter(const std::string& file, const std::string &importer) const;
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bool isreflection(const std::string &token) const {
return mReflection.find(token) != mReflection.end();
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}
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int reflectionArgument(const std::string &token) const {
const std::map<std::string, int>::const_iterator it = mReflection.find(token);
if (it != mReflection.end())
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return it->second;
return -1;
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}
std::set<std::string> returnuninitdata;
std::vector<std::string> defines; // to provide some library defines
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std::set<std::string> smartPointers;
bool isSmartPointer(const Token *tok) const;
struct PodType {
unsigned int size;
char sign;
enum { NO, BOOL, CHAR, SHORT, INT, LONG, LONGLONG } stdtype;
};
const struct PodType *podtype(const std::string &name) const {
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const std::map<std::string, struct PodType>::const_iterator it = mPodTypes.find(name);
return (it != mPodTypes.end()) ? &(it->second) : nullptr;
}
struct PlatformType {
PlatformType()
: mSigned(false)
, mUnsigned(false)
, mLong(false)
, mPointer(false)
, mPtrPtr(false)
, mConstPtr(false) {
}
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bool operator == (const PlatformType & type) const {
return (mSigned == type.mSigned &&
mUnsigned == type.mUnsigned &&
mLong == type.mLong &&
mPointer == type.mPointer &&
mPtrPtr == type.mPtrPtr &&
mConstPtr == type.mConstPtr &&
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mType == type.mType);
}
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bool operator != (const PlatformType & type) const {
return !(*this == type);
}
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std::string mType;
bool mSigned;
bool mUnsigned;
bool mLong;
bool mPointer;
bool mPtrPtr;
bool mConstPtr;
};
struct Platform {
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const PlatformType *platform_type(const std::string &name) const {
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const std::map<std::string, struct PlatformType>::const_iterator it = mPlatformTypes.find(name);
return (it != mPlatformTypes.end()) ? &(it->second) : nullptr;
}
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std::map<std::string, PlatformType> mPlatformTypes;
};
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const PlatformType *platform_type(const std::string &name, const std::string & platform) const {
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const std::map<std::string, Platform>::const_iterator it = mPlatforms.find(platform);
if (it != mPlatforms.end()) {
const PlatformType * const type = it->second.platform_type(name);
if (type)
return type;
}
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const std::map<std::string, PlatformType>::const_iterator it2 = mPlatformTypes.find(name);
return (it2 != mPlatformTypes.end()) ? &(it2->second) : nullptr;
}
/**
* Get function name for function call
*/
std::string getFunctionName(const Token *ftok) const;
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static bool isContainerYield(const Token * const cond, Library::Container::Yield y, const std::string& fallback="");
/** Suppress/check a type */
enum class TypeCheck { def, check, suppress };
TypeCheck getTypeCheck(const std::string &check, const std::string &typeName) const;
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private:
// load a <function> xml node
Error loadFunction(const tinyxml2::XMLElement * const node, const std::string &name, std::set<std::string> &unknown_elements);
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class ExportedFunctions {
public:
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void addPrefix(const std::string& prefix) {
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mPrefixes.insert(prefix);
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}
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void addSuffix(const std::string& suffix) {
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mSuffixes.insert(suffix);
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}
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bool isPrefix(const std::string& prefix) const {
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return (mPrefixes.find(prefix) != mPrefixes.end());
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}
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bool isSuffix(const std::string& suffix) const {
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return (mSuffixes.find(suffix) != mSuffixes.end());
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}
private:
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std::set<std::string> mPrefixes;
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std::set<std::string> mSuffixes;
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};
class CodeBlock {
public:
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CodeBlock() : mOffset(0) {}
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void setStart(const char* s) {
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mStart = s;
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}
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void setEnd(const char* e) {
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mEnd = e;
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}
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void setOffset(const int o) {
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mOffset = o;
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}
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void addBlock(const char* blockName) {
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mBlocks.insert(blockName);
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}
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const std::string& start() const {
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return mStart;
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}
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const std::string& end() const {
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return mEnd;
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}
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int offset() const {
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return mOffset;
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}
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bool isBlock(const std::string& blockName) const {
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return mBlocks.find(blockName) != mBlocks.end();
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}
private:
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std::string mStart;
std::string mEnd;
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int mOffset;
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std::set<std::string> mBlocks;
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};
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int mAllocId;
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std::set<std::string> mFiles;
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std::map<std::string, AllocFunc> mAlloc; // allocation functions
std::map<std::string, AllocFunc> mDealloc; // deallocation functions
std::map<std::string, AllocFunc> mRealloc; // reallocation functions
std::map<std::string, bool> mNoReturn; // is function noreturn?
std::map<std::string, std::string> mReturnValue;
std::map<std::string, std::string> mReturnValueType;
std::map<std::string, int> mReturnValueContainer;
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std::map<std::string, std::vector<MathLib::bigint>> mUnknownReturnValues;
std::map<std::string, bool> mReportErrors;
std::map<std::string, bool> mProcessAfterCode;
std::set<std::string> mMarkupExtensions; // file extensions of markup files
std::map<std::string, std::set<std::string> > mKeywords; // keywords for code in the library
std::map<std::string, CodeBlock> mExecutableBlocks; // keywords for blocks of executable code
std::map<std::string, ExportedFunctions> mExporters; // keywords that export variables/functions to libraries (meta-code/macros)
std::map<std::string, std::set<std::string> > mImporters; // keywords that import variables/functions
std::map<std::string, int> mReflection; // invocation of reflection
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std::map<std::string, struct PodType> mPodTypes; // pod types
std::map<std::string, PlatformType> mPlatformTypes; // platform independent typedefs
std::map<std::string, Platform> mPlatforms; // platform dependent typedefs
std::map<std::pair<std::string,std::string>, TypeCheck> mTypeChecks;
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const ArgumentChecks * getarg(const Token *ftok, int argnr) const;
std::string getFunctionName(const Token *ftok, bool *error) const;
static const AllocFunc* getAllocDealloc(const std::map<std::string, AllocFunc> &data, const std::string &name) {
const std::map<std::string, AllocFunc>::const_iterator it = data.find(name);
return (it == data.end()) ? nullptr : &it->second;
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}
};
CPPCHECKLIB const Library::Container * getLibraryContainer(const Token * tok);
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/// @}
//---------------------------------------------------------------------------
#endif // libraryH