/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2020 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 <tinyxml2.h>

#include "checkfunctions.h"
#include "library.h"
#include "settings.h"
#include "standards.h"
#include "testsuite.h"
#include "tokenize.h"


class TestFunctions : public TestFixture {
public:
 TestFunctions() : TestFixture("TestFunctions") {
 }

private:
 Settings settings;

 void run() OVERRIDE {
 settings.addEnabled("style");
 settings.addEnabled("warning");
 settings.addEnabled("portability");
 settings.libraries.emplace_back("posix");
 settings.standards.c = Standards::C11;
 settings.standards.cpp = Standards::CPP11;
 LOAD_LIB_2(settings.library, "std.cfg");
 LOAD_LIB_2(settings.library, "posix.cfg");

 // Prohibited functions
 TEST_CASE(prohibitedFunctions_posix);
 TEST_CASE(prohibitedFunctions_index);
 TEST_CASE(prohibitedFunctions_qt_index); // FP when using the Qt function 'index'?
 TEST_CASE(prohibitedFunctions_rindex);
 TEST_CASE(prohibitedFunctions_var); // no false positives for variables
 TEST_CASE(prohibitedFunctions_gets); // dangerous function
 TEST_CASE(prohibitedFunctions_alloca);
 TEST_CASE(prohibitedFunctions_declaredFunction); // declared function ticket #3121
 TEST_CASE(prohibitedFunctions_std_gets); // test std::gets
 TEST_CASE(prohibitedFunctions_multiple); // multiple use of obsolete functions
 TEST_CASE(prohibitedFunctions_c_declaration); // c declared function
 TEST_CASE(prohibitedFunctions_functionWithBody); // function with body
 TEST_CASE(prohibitedFunctions_crypt); // Non-reentrant function
 TEST_CASE(prohibitedFunctions_namespaceHandling);

 // Invalid function usage
 TEST_CASE(invalidFunctionUsage1);
 // TODO TEST_CASE(invalidFunctionUsageStrings);

 // Math function usage
 TEST_CASE(mathfunctionCall_fmod);
 TEST_CASE(mathfunctionCall_sqrt);
 TEST_CASE(mathfunctionCall_log);
 TEST_CASE(mathfunctionCall_acos);
 TEST_CASE(mathfunctionCall_asin);
 TEST_CASE(mathfunctionCall_pow);
 TEST_CASE(mathfunctionCall_atan2);
 TEST_CASE(mathfunctionCall_precision);

 // Ignored return value
 TEST_CASE(checkIgnoredReturnValue);

 // memset..
 TEST_CASE(memsetZeroBytes);
 TEST_CASE(memsetInvalid2ndParam);
 }

 void check(const char code[], const char filename[]="test.cpp", const Settings* settings_=nullptr) {
 // Clear the error buffer..
 errout.str("");

 if (!settings_)
 settings_ = &settings;

 // Tokenize..
 Tokenizer tokenizer(settings_, this);
 std::istringstream istr(code);
 tokenizer.tokenize(istr, filename);

 CheckFunctions checkFunctions(&tokenizer, settings_, this);
 checkFunctions.runChecks(&tokenizer, settings_, this);
 }

 void prohibitedFunctions_posix() {
 check("void f()\n"
 "{\n"
 " bsd_signal(SIGABRT, SIG_IGN);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (style) Obsolescent function 'bsd_signal' called. It is recommended to use 'sigaction' instead.\n", errout.str());

 check("int f()\n"
 "{\n"
 " int bsd_signal(0);\n"
 " return bsd_signal;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void f()\n"
 "{\n"
 " struct hostent *hp;\n"
 " if(!hp = gethostbyname(\"127.0.0.1\")) {\n"
 " exit(1);\n"
 " }\n"
 "}");
 ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'gethostbyname' called. It is recommended to use 'getaddrinfo' instead.\n", errout.str());

 check("void f()\n"
 "{\n"
 " long addr;\n"
 " addr = inet_addr(\"127.0.0.1\");\n"
 " if(!hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET)) {\n"
 " exit(1);\n"
 " }\n"
 "}");
 ASSERT_EQUALS("[test.cpp:5]: (style) Obsolescent function 'gethostbyaddr' called. It is recommended to use 'getnameinfo' instead.\n", errout.str());

 check("void f()\n"
 "{\n"
 " usleep( 1000 );\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (style) Obsolescent function 'usleep' called. It is recommended to use 'nanosleep' or 'setitimer' instead.\n", errout.str());
 }

 void prohibitedFunctions_index() {
 check("namespace n1 {\n"
 " int index(){};\n"
 "}\n"
 "int main()\n"
 "{\n"
 " n1::index();\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("std::size_t f()\n"
 "{\n"
 " std::size_t index(0);\n"
 " index++;\n"
 " return index;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("int f()\n"
 "{\n"
 " return this->index();\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void f()\n"
 "{\n"
 " int index( 0 );\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("const char f()\n"
 "{\n"
 " const char var[6] = \"index\";\n"
 " const char i = index(var, 0);\n"
 " return i;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'index' called. It is recommended to use 'strchr' instead.\n",
 errout.str());
 }

 void prohibitedFunctions_qt_index() {
 check("void TDataModel::forceRowRefresh(int row) {\n"
 " emit dataChanged(index(row, 0), index(row, columnCount() - 1));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (style) Obsolescent function 'index' called. It is recommended to use 'strchr' instead.\n", errout.str());
 }

 void prohibitedFunctions_rindex() {
 check("void f()\n"
 "{\n"
 " int rindex( 0 );\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void f()\n"
 "{\n"
 " const char var[7] = \"rindex\";\n"
 " print(rindex(var, 0));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:4]: (style) Obsolescent function 'rindex' called. It is recommended to use 'strrchr' instead.\n", errout.str());
 }


 void prohibitedFunctions_var() {
 check("class Fred {\n"
 "public:\n"
 " Fred() : index(0) { }\n"
 " int index;\n"
 "};");
 ASSERT_EQUALS("", errout.str());
 }

 void prohibitedFunctions_gets() {
 check("void f()\n"
 "{\n"
 " char *x = gets(a);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());

 check("void f()\n"
 "{\n"
 " foo(x, gets(a));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
 }

 void prohibitedFunctions_alloca() {
 check("void f()\n"
 "{\n"
 " char *x = alloca(10);\n"
 "}", "test.cpp"); // #4382 - there are no VLAs in C++
 ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'alloca' called.\n", errout.str());

 check("void f()\n"
 "{\n"
 " char *x = alloca(10);\n"
 "}", "test.c");
 ASSERT_EQUALS("[test.c:3]: (warning) Obsolete function 'alloca' called. In C99 and later it is recommended to use a variable length array instead.\n", errout.str());

 settings.standards.c = Standards::C89;
 settings.standards.cpp = Standards::CPP03;
 check("void f()\n"
 "{\n"
 " char *x = alloca(10);\n"
 "}", "test.cpp"); // #4382 - there are no VLAs in C++
 ASSERT_EQUALS("", errout.str());

 check("void f()\n"
 "{\n"
 " char *x = alloca(10);\n"
 "}", "test.c"); // #7558 - no alternative to alloca in C89
 ASSERT_EQUALS("", errout.str());

 check("void f()\n"
 "{\n"
 " char *x = alloca(10);\n"
 "}", "test.c");
 ASSERT_EQUALS("", errout.str());
 settings.standards.c = Standards::C11;
 settings.standards.cpp = Standards::CPP11;
 }

 // ticket #3121
 void prohibitedFunctions_declaredFunction() {
 check("int ftime ( int a )\n"
 "{\n"
 " return a;\n"
 "}\n"
 "int main ()\n"
 "{\n"
 " int b ; b = ftime ( 1 ) ;\n"
 " return 0 ;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 // test std::gets
 void prohibitedFunctions_std_gets() {
 check("void f(char * str)\n"
 "{\n"
 " char *x = std::gets(str);\n"
 " char *y = gets(str);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n"
 "[test.cpp:4]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());
 }

 // multiple use
 void prohibitedFunctions_multiple() {
 check("void f(char * str)\n"
 "{\n"
 " char *x = std::gets(str);\n"
 " usleep( 1000 );\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n"
 "[test.cpp:4]: (style) Obsolescent function 'usleep' called. It is recommended to use 'nanosleep' or 'setitimer' instead.\n", errout.str());
 }

 void prohibitedFunctions_c_declaration() {
 check("char * gets ( char * c ) ;\n"
 "int main ()\n"
 "{\n"
 " char s [ 10 ] ;\n"
 " gets ( s ) ;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:5]: (warning) Obsolete function 'gets' called. It is recommended to use 'fgets' or 'gets_s' instead.\n", errout.str());

 check("int getcontext(ucontext_t *ucp);\n"
 "int f (ucontext_t *ucp)\n"
 "{\n"
 " getcontext ( ucp ) ;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:4]: (portability) Obsolescent function 'getcontext' called. Applications are recommended to be rewritten to use POSIX threads.\n", errout.str());
 }

 void prohibitedFunctions_functionWithBody() {
 check("char * gets ( char * c ) { return c; }\n"
 "int main ()\n"
 "{\n"
 " char s [ 10 ] ;\n"
 " gets ( s ) ;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void prohibitedFunctions_crypt() {
 check("void f(char *pwd)\n"
 "{\n"
 " char *cpwd;"
 " crypt(pwd, cpwd);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function crypt() is not used.\n"
 "[test.cpp:3]: (portability) Non reentrant function 'crypt' called. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'.\n", errout.str());

 check("void f()\n"
 "{\n"
 " char *pwd = getpass(\"Password:\");"
 " char *cpwd;"
 " crypt(pwd, cpwd);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function crypt() is not used.\n"
 "[test.cpp:3]: (portability) Non reentrant function 'crypt' called. For threadsafe applications it is recommended to use the reentrant replacement function 'crypt_r'.\n", errout.str());

 check("int f()\n"
 "{\n"
 " int crypt = 0;"
 " return crypt;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void prohibitedFunctions_namespaceHandling() {
 check("int f()\n"
 "{\n"
 " time_t t = 0;"
 " std::localtime(&t);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'localtime' called. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'.\n", errout.str());

 // Passed as function argument
 check("int f()\n"
 "{\n"
 " printf(\"Magic guess: %d\", getpwent());\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'getpwent' called. For threadsafe applications it is recommended to use the reentrant replacement function 'getpwent_r'.\n", errout.str());

 // Pass return value
 check("int f()\n"
 "{\n"
 " time_t t = 0;"
 " struct tm *foo = localtime(&t);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (portability) Non reentrant function 'localtime' called. For threadsafe applications it is recommended to use the reentrant replacement function 'localtime_r'.\n", errout.str());

 // Access via global namespace
 check("int f()\n"
 "{\n"
 " ::getpwent();\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function getpwent() is not used.\n"
 "[test.cpp:3]: (portability) Non reentrant function 'getpwent' called. For threadsafe applications it is recommended to use the reentrant replacement function 'getpwent_r'.\n", errout.str());

 // Be quiet on function definitions
 check("int getpwent()\n"
 "{\n"
 " return 123;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 // Be quiet on other namespaces
 check("int f()\n"
 "{\n"
 " foobar::getpwent();\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 // Be quiet on class member functions
 check("int f()\n"
 "{\n"
 " foobar.getpwent();\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void invalidFunctionUsage1() {
 check("int f() { memset(a,b,sizeof(a)!=12); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 check("int f() { memset(a,b,sizeof(a)!=0); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 check("int f() { memset(a,b,!c); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 // Ticket #6990
 check("int f(bool c) { memset(a,b,c); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
 check("int f() { memset(a,b,true); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 // Ticket #6588 (c mode)
 check("void record(char* buf, int n) {\n"
 " memset(buf, 0, n < 255);\n" /* KO */
 " memset(buf, 0, n < 255 ? n : 255);\n" /* OK */
 "}", "test.c");
 ASSERT_EQUALS("[test.c:2]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 // Ticket #6588 (c++ mode)
 check("void record(char* buf, int n) {\n"
 " memset(buf, 0, n < 255);\n" /* KO */
 " memset(buf, 0, n < 255 ? n : 255);\n" /* OK */
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());

 check("void boolArgZeroIsInvalidButOneIsValid(int param) {\n"
 " void* buffer = calloc(param > 0, 10);\n"
 " free(buffer);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (error) Invalid calloc() argument nr 1. The value is 0 or 1 (boolean) but the valid values are '1:'.\n", errout.str());

 check("void boolArgZeroIsValidButOneIsInvalid(int param) {\n"
 " strtol(a, b, param > 0);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (error) Invalid strtol() argument nr 3. The value is 0 or 1 (boolean) but the valid values are '0,2:36'.\n", errout.str());

 check("int f() { strtol(a,b,1); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strtol() argument nr 3. The value is 1 but the valid values are '0,2:36'.\n", errout.str());

 check("int f() { strtol(a,b,10); }");
 ASSERT_EQUALS("", errout.str());
 }

 void invalidFunctionUsageStrings() {
 check("size_t f() { char x = 'x'; return strlen(&x); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("size_t f() { return strlen(&x); }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f(char x) { return strlen(&x); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("size_t f() { char x = '\\0'; return strlen(&x); }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f() {\n"
 " char x;\n"
 " if (y)\n"
 " x = '\\0';\n"
 " else\n"
 " x = 'a';\n"
 " return strlen(&x);\n"
 "}");
 ASSERT_EQUALS("[test.cpp:7]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("int f() { char x = '\\0'; return strcmp(\"Hello world\", &x); }");
 ASSERT_EQUALS("", errout.str());

 check("int f() { char x = 'x'; return strcmp(\"Hello world\", &x); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strcmp() argument nr 2. A nul-terminated string is required.\n", errout.str());

 check("size_t f(char x) { char * y = &x; return strlen(y) }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("size_t f(char x) { char * y = &x; char *z = y; return strlen(z) }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("size_t f() { char x = 'x'; char * y = &x; char *z = y; return strlen(z) }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("size_t f() { char x = '\\0'; char * y = &x; char *z = y; return strlen(z) }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f() { char x[] = \"Hello world\"; return strlen(x) }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f(char x[]) { return strlen(x) }");
 ASSERT_EQUALS("", errout.str());

 check("int f(char x, char y) { return strcmp(&x, &y); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strcmp() argument nr 1. A nul-terminated string is required.\n"
 "[test.cpp:1]: (error) Invalid strcmp() argument nr 2. A nul-terminated string is required.\n", errout.str());

 check("size_t f() { char x[] = \"Hello world\"; return strlen(&x[0]) }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f() { char* x = \"Hello world\"; return strlen(&x[0]) }");
 ASSERT_EQUALS("", errout.str());

 check("struct S {\n"
 " char x;\n"
 "};\n"
 "size_t f() {\n"
 " S s1 = {0};\n"
 " S s2;\n;"
 " s2.x = 'x';\n"
 " size_t l1 = strlen(&s1.x);\n"
 " size_t l2 = strlen(&s2.x);\n"
 " return l1 + l2;\n"
 "}\n");
 TODO_ASSERT_EQUALS("[test.cpp:9]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", "", errout.str());

 check("const char x = 'x'; size_t f() { return strlen(&x); }");
 TODO_ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", "", errout.str());

 check("const char x = 'x'; size_t f() { char y = x; return strlen(&y); }");
 ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strlen() argument nr 1. A nul-terminated string is required.\n", errout.str());

 check("const char x = '\\0'; size_t f() { return strlen(&x); }");
 ASSERT_EQUALS("", errout.str());

 check("const char x = '\\0'; size_t f() { char y = x; return strlen(&y); }");
 ASSERT_EQUALS("", errout.str());

 check("size_t f() {\n"
 " char * a = \"Hello world\";\n"
 " char ** b = &a;\n"
 " return strlen(&b[0][0]);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 check("size_t f() {\n"
 " char ca[] = \"asdf\";\n"
 " return strlen((char*) &ca);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 // #5225
 check("int main(void)\n"
 "{\n"
 " char str[80] = \"hello worl\";\n"
 " char d = 'd';\n"
 " strcat(str, &d);\n"
 " puts(str);\n"
 " return 0;\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:5]: (error) Invalid strcat() argument nr 2. A nul-terminated string is required.\n", errout.str());
 }

 void mathfunctionCall_sqrt() {
 // sqrt, sqrtf, sqrtl
 check("void foo()\n"
 "{\n"
 " std::cout << sqrt(-1) << std::endl;\n"
 " std::cout << sqrtf(-1) << std::endl;\n"
 " std::cout << sqrtl(-1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid sqrt() argument nr 1. The value is -1 but the valid values are '0.0:'.\n"
 "[test.cpp:4]: (error) Invalid sqrtf() argument nr 1. The value is -1 but the valid values are '0.0:'.\n"
 "[test.cpp:5]: (error) Invalid sqrtl() argument nr 1. The value is -1 but the valid values are '0.0:'.\n", errout.str());

 // implementation-defined behaviour for "finite values of x<0" only:
 check("void foo()\n"
 "{\n"
 " std::cout << sqrt(-0.) << std::endl;\n"
 " std::cout << sqrtf(-0.) << std::endl;\n"
 " std::cout << sqrtl(-0.) << std::endl;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << sqrt(1) << std::endl;\n"
 " std::cout << sqrtf(1) << std::endl;\n"
 " std::cout << sqrtl(1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void mathfunctionCall_log() {
 // log,log10,logf,logl,log10f,log10l,log2,log2f,log2l,log1p,log1pf,log1pl
 check("void foo()\n"
 "{\n"
 " std::cout << log(-2) << std::endl;\n"
 " std::cout << logf(-2) << std::endl;\n"
 " std::cout << logl(-2) << std::endl;\n"
 " std::cout << log10(-2) << std::endl;\n"
 " std::cout << log10f(-2) << std::endl;\n"
 " std::cout << log10l(-2) << std::endl;\n"
 " std::cout << log2(-2) << std::endl;\n"
 " std::cout << log2f(-2) << std::endl;\n"
 " std::cout << log2l(-2) << std::endl;\n"
 " std::cout << log1p(-3) << std::endl;\n"
 " std::cout << log1pf(-3) << std::endl;\n"
 " std::cout << log1pl(-3) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid log() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:4]: (error) Invalid logf() argument nr 1. The value is -2 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:5]: (error) Invalid logl() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:6]: (error) Invalid log10() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:7]: (error) Invalid log10f() argument nr 1. The value is -2 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:8]: (error) Invalid log10l() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:9]: (error) Invalid log2() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:10]: (error) Invalid log2f() argument nr 1. The value is -2 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:11]: (error) Invalid log2l() argument nr 1. The value is -2 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:3]: (warning) Passing value -2 to log() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing value -2 to logf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing value -2 to logl() leads to implementation-defined result.\n"
 "[test.cpp:6]: (warning) Passing value -2 to log10() leads to implementation-defined result.\n"
 "[test.cpp:7]: (warning) Passing value -2 to log10f() leads to implementation-defined result.\n"
 "[test.cpp:8]: (warning) Passing value -2 to log10l() leads to implementation-defined result.\n"
 "[test.cpp:9]: (warning) Passing value -2 to log2() leads to implementation-defined result.\n"
 "[test.cpp:10]: (warning) Passing value -2 to log2f() leads to implementation-defined result.\n"
 "[test.cpp:11]: (warning) Passing value -2 to log2l() leads to implementation-defined result.\n"
 "[test.cpp:12]: (warning) Passing value -3 to log1p() leads to implementation-defined result.\n"
 "[test.cpp:13]: (warning) Passing value -3 to log1pf() leads to implementation-defined result.\n"
 "[test.cpp:14]: (warning) Passing value -3 to log1pl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << log(-1) << std::endl;\n"
 " std::cout << logf(-1) << std::endl;\n"
 " std::cout << logl(-1) << std::endl;\n"
 " std::cout << log10(-1) << std::endl;\n"
 " std::cout << log10f(-1) << std::endl;\n"
 " std::cout << log10l(-1) << std::endl;\n"
 " std::cout << log2(-1) << std::endl;\n"
 " std::cout << log2f(-1) << std::endl;\n"
 " std::cout << log2l(-1) << std::endl;\n"
 " std::cout << log1p(-2) << std::endl;\n"
 " std::cout << log1pf(-2) << std::endl;\n"
 " std::cout << log1pl(-2) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid log() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:4]: (error) Invalid logf() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:5]: (error) Invalid logl() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:6]: (error) Invalid log10() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:7]: (error) Invalid log10f() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:8]: (error) Invalid log10l() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:9]: (error) Invalid log2() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:10]: (error) Invalid log2f() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:11]: (error) Invalid log2l() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:3]: (warning) Passing value -1 to log() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing value -1 to logf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing value -1 to logl() leads to implementation-defined result.\n"
 "[test.cpp:6]: (warning) Passing value -1 to log10() leads to implementation-defined result.\n"
 "[test.cpp:7]: (warning) Passing value -1 to log10f() leads to implementation-defined result.\n"
 "[test.cpp:8]: (warning) Passing value -1 to log10l() leads to implementation-defined result.\n"
 "[test.cpp:9]: (warning) Passing value -1 to log2() leads to implementation-defined result.\n"
 "[test.cpp:10]: (warning) Passing value -1 to log2f() leads to implementation-defined result.\n"
 "[test.cpp:11]: (warning) Passing value -1 to log2l() leads to implementation-defined result.\n"
 "[test.cpp:12]: (warning) Passing value -2 to log1p() leads to implementation-defined result.\n"
 "[test.cpp:13]: (warning) Passing value -2 to log1pf() leads to implementation-defined result.\n"
 "[test.cpp:14]: (warning) Passing value -2 to log1pl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << log(-1.0) << std::endl;\n"
 " std::cout << logf(-1.0) << std::endl;\n"
 " std::cout << logl(-1.0) << std::endl;\n"
 " std::cout << log10(-1.0) << std::endl;\n"
 " std::cout << log10f(-1.0) << std::endl;\n"
 " std::cout << log10l(-1.0) << std::endl;\n"
 " std::cout << log2(-1.0) << std::endl;\n"
 " std::cout << log2f(-1.0) << std::endl;\n"
 " std::cout << log2l(-1.0) << std::endl;\n"
 " std::cout << log1p(-2.0) << std::endl;\n"
 " std::cout << log1pf(-2.0) << std::endl;\n"
 " std::cout << log1pl(-2.0) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid log() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:4]: (error) Invalid logf() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:5]: (error) Invalid logl() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:6]: (error) Invalid log10() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:7]: (error) Invalid log10f() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:8]: (error) Invalid log10l() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:9]: (error) Invalid log2() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:10]: (error) Invalid log2f() argument nr 1. The value is -1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:11]: (error) Invalid log2l() argument nr 1. The value is -1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:3]: (warning) Passing value -1.0 to log() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing value -1.0 to logf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing value -1.0 to logl() leads to implementation-defined result.\n"
 "[test.cpp:6]: (warning) Passing value -1.0 to log10() leads to implementation-defined result.\n"
 "[test.cpp:7]: (warning) Passing value -1.0 to log10f() leads to implementation-defined result.\n"
 "[test.cpp:8]: (warning) Passing value -1.0 to log10l() leads to implementation-defined result.\n"
 "[test.cpp:9]: (warning) Passing value -1.0 to log2() leads to implementation-defined result.\n"
 "[test.cpp:10]: (warning) Passing value -1.0 to log2f() leads to implementation-defined result.\n"
 "[test.cpp:11]: (warning) Passing value -1.0 to log2l() leads to implementation-defined result.\n"
 "[test.cpp:12]: (warning) Passing value -2.0 to log1p() leads to implementation-defined result.\n"
 "[test.cpp:13]: (warning) Passing value -2.0 to log1pf() leads to implementation-defined result.\n"
 "[test.cpp:14]: (warning) Passing value -2.0 to log1pl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << log(-0.1) << std::endl;\n"
 " std::cout << logf(-0.1) << std::endl;\n"
 " std::cout << logl(-0.1) << std::endl;\n"
 " std::cout << log10(-0.1) << std::endl;\n"
 " std::cout << log10f(-0.1) << std::endl;\n"
 " std::cout << log10l(-0.1) << std::endl;\n"
 " std::cout << log2(-0.1) << std::endl;\n"
 " std::cout << log2f(-0.1) << std::endl;\n"
 " std::cout << log2l(-0.1) << std::endl;\n"
 " std::cout << log1p(-1.1) << std::endl;\n"
 " std::cout << log1pf(-1.1) << std::endl;\n"
 " std::cout << log1pl(-1.1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid log() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:4]: (error) Invalid logf() argument nr 1. The value is -0.1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:5]: (error) Invalid logl() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:6]: (error) Invalid log10() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:7]: (error) Invalid log10f() argument nr 1. The value is -0.1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:8]: (error) Invalid log10l() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:9]: (error) Invalid log2() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:10]: (error) Invalid log2f() argument nr 1. The value is -0.1 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:11]: (error) Invalid log2l() argument nr 1. The value is -0.1 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:3]: (warning) Passing value -0.1 to log() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing value -0.1 to logf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing value -0.1 to logl() leads to implementation-defined result.\n"
 "[test.cpp:6]: (warning) Passing value -0.1 to log10() leads to implementation-defined result.\n"
 "[test.cpp:7]: (warning) Passing value -0.1 to log10f() leads to implementation-defined result.\n"
 "[test.cpp:8]: (warning) Passing value -0.1 to log10l() leads to implementation-defined result.\n"
 "[test.cpp:9]: (warning) Passing value -0.1 to log2() leads to implementation-defined result.\n"
 "[test.cpp:10]: (warning) Passing value -0.1 to log2f() leads to implementation-defined result.\n"
 "[test.cpp:11]: (warning) Passing value -0.1 to log2l() leads to implementation-defined result.\n"
 "[test.cpp:12]: (warning) Passing value -1.1 to log1p() leads to implementation-defined result.\n"
 "[test.cpp:13]: (warning) Passing value -1.1 to log1pf() leads to implementation-defined result.\n"
 "[test.cpp:14]: (warning) Passing value -1.1 to log1pl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << log(0) << std::endl;\n"
 " std::cout << logf(0.) << std::endl;\n"
 " std::cout << logl(0.0) << std::endl;\n"
 " std::cout << log10(0.0) << std::endl;\n"
 " std::cout << log10f(0) << std::endl;\n"
 " std::cout << log10l(0.) << std::endl;\n"
 " std::cout << log2(0.) << std::endl;\n"
 " std::cout << log2f(0.0) << std::endl;\n"
 " std::cout << log2l(0) << std::endl;\n"
 " std::cout << log1p(-1.) << std::endl;\n"
 " std::cout << log1pf(-1.0) << std::endl;\n"
 " std::cout << log1pl(-1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid log() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:4]: (error) Invalid logf() argument nr 1. The value is 0 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:5]: (error) Invalid logl() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:6]: (error) Invalid log10() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:7]: (error) Invalid log10f() argument nr 1. The value is 0 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:8]: (error) Invalid log10l() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:9]: (error) Invalid log2() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:10]: (error) Invalid log2f() argument nr 1. The value is 0 but the valid values are '1.4013e-45:'.\n"
 "[test.cpp:11]: (error) Invalid log2l() argument nr 1. The value is 0 but the valid values are '4.94066e-324:'.\n"
 "[test.cpp:3]: (warning) Passing value 0 to log() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing value 0. to logf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing value 0.0 to logl() leads to implementation-defined result.\n"
 "[test.cpp:6]: (warning) Passing value 0.0 to log10() leads to implementation-defined result.\n"
 "[test.cpp:7]: (warning) Passing value 0 to log10f() leads to implementation-defined result.\n"
 "[test.cpp:8]: (warning) Passing value 0. to log10l() leads to implementation-defined result.\n"
 "[test.cpp:9]: (warning) Passing value 0. to log2() leads to implementation-defined result.\n"
 "[test.cpp:10]: (warning) Passing value 0.0 to log2f() leads to implementation-defined result.\n"
 "[test.cpp:11]: (warning) Passing value 0 to log2l() leads to implementation-defined result.\n"
 "[test.cpp:12]: (warning) Passing value -1. to log1p() leads to implementation-defined result.\n"
 "[test.cpp:13]: (warning) Passing value -1.0 to log1pf() leads to implementation-defined result.\n"
 "[test.cpp:14]: (warning) Passing value -1 to log1pl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << log(1E-3) << std::endl;\n"
 " std::cout << logf(1E-3) << std::endl;\n"
 " std::cout << logl(1E-3) << std::endl;\n"
 " std::cout << log10(1E-3) << std::endl;\n"
 " std::cout << log10f(1E-3) << std::endl;\n"
 " std::cout << log10l(1E-3) << std::endl;\n"
 " std::cout << log2(1E-3) << std::endl;\n"
 " std::cout << log2f(1E-3) << std::endl;\n"
 " std::cout << log2l(1E-3) << std::endl;\n"
 " std::cout << log1p(-1+1E-3) << std::endl;\n"
 " std::cout << log1pf(-1+1E-3) << std::endl;\n"
 " std::cout << log1pl(-1+1E-3) << std::endl;\n"
 " std::cout << log(1.0E-3) << std::endl;\n"
 " std::cout << logf(1.0E-3) << std::endl;\n"
 " std::cout << logl(1.0E-3) << std::endl;\n"
 " std::cout << log10(1.0E-3) << std::endl;\n"
 " std::cout << log10f(1.0E-3) << std::endl;\n"
 " std::cout << log10l(1.0E-3) << std::endl;\n"
 " std::cout << log2(1.0E-3) << std::endl;\n"
 " std::cout << log2f(1.0E-3) << std::endl;\n"
 " std::cout << log2l(1.0E-3) << std::endl;\n"
 " std::cout << log1p(-1+1.0E-3) << std::endl;\n"
 " std::cout << log1pf(-1+1.0E-3) << std::endl;\n"
 " std::cout << log1pl(-1+1.0E-3) << std::endl;\n"
 " std::cout << log(1.0E+3) << std::endl;\n"
 " std::cout << logf(1.0E+3) << std::endl;\n"
 " std::cout << logl(1.0E+3) << std::endl;\n"
 " std::cout << log10(1.0E+3) << std::endl;\n"
 " std::cout << log10f(1.0E+3) << std::endl;\n"
 " std::cout << log10l(1.0E+3) << std::endl;\n"
 " std::cout << log2(1.0E+3) << std::endl;\n"
 " std::cout << log2f(1.0E+3) << std::endl;\n"
 " std::cout << log2l(1.0E+3) << std::endl;\n"
 " std::cout << log1p(1.0E+3) << std::endl;\n"
 " std::cout << log1pf(1.0E+3) << std::endl;\n"
 " std::cout << log1pl(1.0E+3) << std::endl;\n"
 " std::cout << log(2.0) << std::endl;\n"
 " std::cout << logf(2.0) << std::endl;\n"
 " std::cout << logf(2.0f) << std::endl;\n"
 " std::cout << log10(2.0) << std::endl;\n"
 " std::cout << log10f(2.0) << std::endl;\n"
 " std::cout << log10f(2.0f) << std::endl;\n"
 " std::cout << log2(2.0) << std::endl;\n"
 " std::cout << log2f(2.0) << std::endl;\n"
 " std::cout << log2f(2.0f) << std::endl;\n"
 " std::cout << log1p(2.0) << std::endl;\n"
 " std::cout << log1pf(2.0) << std::endl;\n"
 " std::cout << log1pf(2.0f) << std::endl;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void foo()\n"
 "{\n"
 " std::string *log(0);\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 // #3473 - no warning if "log" is a variable
 check("Fred::Fred() : log(0) { }");
 ASSERT_EQUALS("", errout.str());

 // #5748
 check("void f() { foo.log(0); }");
 ASSERT_EQUALS("", errout.str());
 }

 void mathfunctionCall_acos() {
 // acos, acosf, acosl
 check("void foo()\n"
 "{\n"
 " return acos(-1) \n"
 " + acos(0.1) \n"
 " + acos(0.0001) \n"
 " + acos(0.01) \n"
 " + acos(1.0E-1) \n"
 " + acos(-1.0E-1) \n"
 " + acos(+1.0E-1) \n"
 " + acos(0.1E-1) \n"
 " + acos(+0.1E-1) \n"
 " + acos(-0.1E-1) \n"
 " + acosf(-1) \n"
 " + acosf(0.1) \n"
 " + acosf(0.0001) \n"
 " + acosf(0.01) \n"
 " + acosf(1.0E-1) \n"
 " + acosf(-1.0E-1) \n"
 " + acosf(+1.0E-1) \n"
 " + acosf(0.1E-1) \n"
 " + acosf(+0.1E-1) \n"
 " + acosf(-0.1E-1) \n"
 " + acosl(-1) \n"
 " + acosl(0.1) \n"
 " + acosl(0.0001) \n"
 " + acosl(0.01) \n"
 " + acosl(1.0E-1) \n"
 " + acosl(-1.0E-1) \n"
 " + acosl(+1.0E-1) \n"
 " + acosl(0.1E-1) \n"
 " + acosl(+0.1E-1) \n"
 " + acosl(-0.1E-1); \n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << acos(1.1) << std::endl;\n"
 " std::cout << acosf(1.1) << std::endl;\n"
 " std::cout << acosl(1.1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid acos() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:4]: (error) Invalid acosf() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:5]: (error) Invalid acosl() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << acos(-1.1) << std::endl;\n"
 " std::cout << acosf(-1.1) << std::endl;\n"
 " std::cout << acosl(-1.1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid acos() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:4]: (error) Invalid acosf() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:5]: (error) Invalid acosl() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n", errout.str());
 }

 void mathfunctionCall_asin() {
 // asin, asinf, asinl
 check("void foo()\n"
 "{\n"
 " return asin(1) \n"
 " + asin(-1) \n"
 " + asin(0.1) \n"
 " + asin(0.0001) \n"
 " + asin(0.01) \n"
 " + asin(1.0E-1) \n"
 " + asin(-1.0E-1) \n"
 " + asin(+1.0E-1) \n"
 " + asin(0.1E-1) \n"
 " + asin(+0.1E-1) \n"
 " + asin(-0.1E-1) \n"
 " + asinf(1) \n"
 " + asinf(-1) \n"
 " + asinf(0.1) \n"
 " + asinf(0.0001) \n"
 " + asinf(0.01) \n"
 " + asinf(1.0E-1) \n"
 " + asinf(-1.0E-1) \n"
 " + asinf(+1.0E-1) \n"
 " + asinf(0.1E-1) \n"
 " + asinf(+0.1E-1) \n"
 " + asinf(-0.1E-1) \n"
 " + asinl(1) \n"
 " + asinl(-1) \n"
 " + asinl(0.1) \n"
 " + asinl(0.0001) \n"
 " + asinl(0.01) \n"
 " + asinl(1.0E-1) \n"
 " + asinl(-1.0E-1) \n"
 " + asinl(+1.0E-1) \n"
 " + asinl(0.1E-1) \n"
 " + asinl(+0.1E-1) \n"
 " + asinl(-0.1E-1); \n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << asin(1.1) << std::endl;\n"
 " std::cout << asinf(1.1) << std::endl;\n"
 " std::cout << asinl(1.1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid asin() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:4]: (error) Invalid asinf() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:5]: (error) Invalid asinl() argument nr 1. The value is 1.1 but the valid values are '-1.0:1.0'.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << asin(-1.1) << std::endl;\n"
 " std::cout << asinf(-1.1) << std::endl;\n"
 " std::cout << asinl(-1.1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (error) Invalid asin() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:4]: (error) Invalid asinf() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n"
 "[test.cpp:5]: (error) Invalid asinl() argument nr 1. The value is -1.1 but the valid values are '-1.0:1.0'.\n", errout.str());
 }

 void mathfunctionCall_pow() {
 // pow, powf, powl
 check("void foo()\n"
 "{\n"
 " std::cout << pow(0,-10) << std::endl;\n"
 " std::cout << powf(0,-10) << std::endl;\n"
 " std::cout << powl(0,-10) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and -10 to pow() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing values 0 and -10 to powf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing values 0 and -10 to powl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << pow(0,10) << std::endl;\n"
 " std::cout << powf(0,10) << std::endl;\n"
 " std::cout << powl(0,10) << std::endl;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void mathfunctionCall_atan2() {
 // atan2
 check("void foo()\n"
 "{\n"
 " std::cout << atan2(1,1) ;\n"
 " std::cout << atan2(-1,-1) ;\n"
 " std::cout << atan2(0.1,1) ;\n"
 " std::cout << atan2(0.0001,100) ;\n"
 " std::cout << atan2(0.0,1e-1) ;\n"
 " std::cout << atan2(1.0E-1,-3) ;\n"
 " std::cout << atan2(-1.0E-1,+2) ;\n"
 " std::cout << atan2(+1.0E-1,0) ;\n"
 " std::cout << atan2(0.1E-1,3) ;\n"
 " std::cout << atan2(+0.1E-1,1) ;\n"
 " std::cout << atan2(-0.1E-1,8) ;\n"
 " std::cout << atan2f(1,1) ;\n"
 " std::cout << atan2f(-1,-1) ;\n"
 " std::cout << atan2f(0.1,1) ;\n"
 " std::cout << atan2f(0.0001,100) ;\n"
 " std::cout << atan2f(0.0,1e-1) ;\n"
 " std::cout << atan2f(1.0E-1,-3) ;\n"
 " std::cout << atan2f(-1.0E-1,+2) ;\n"
 " std::cout << atan2f(+1.0E-1,0) ;\n"
 " std::cout << atan2f(0.1E-1,3) ;\n"
 " std::cout << atan2f(+0.1E-1,1) ;\n"
 " std::cout << atan2f(-0.1E-1,8) ;\n"
 " std::cout << atan2l(1,1) ;\n"
 " std::cout << atan2l(-1,-1) ;\n"
 " std::cout << atan2l(0.1,1) ;\n"
 " std::cout << atan2l(0.0001,100) ;\n"
 " std::cout << atan2l(0.0,1e-1) ;\n"
 " std::cout << atan2l(1.0E-1,-3) ;\n"
 " std::cout << atan2l(-1.0E-1,+2) ;\n"
 " std::cout << atan2l(+1.0E-1,0) ;\n"
 " std::cout << atan2l(0.1E-1,3) ;\n"
 " std::cout << atan2l(+0.1E-1,1) ;\n"
 " std::cout << atan2l(-0.1E-1,8) ;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << atan2(0,0) << std::endl;\n"
 " std::cout << atan2f(0,0) << std::endl;\n"
 " std::cout << atan2l(0,0) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and 0 to atan2() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing values 0 and 0 to atan2f() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing values 0 and 0 to atan2l() leads to implementation-defined result.\n", errout.str());
 }

 void mathfunctionCall_fmod() {
 // fmod, fmodl, fmodf
 check("void foo()\n"
 "{\n"
 " std::cout << fmod(1.0,0) << std::endl;\n"
 " std::cout << fmodf(1.0,0) << std::endl;\n"
 " std::cout << fmodl(1.0,0) << std::endl;\n"
 "}");
 ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 1.0 and 0 to fmod() leads to implementation-defined result.\n"
 "[test.cpp:4]: (warning) Passing values 1.0 and 0 to fmodf() leads to implementation-defined result.\n"
 "[test.cpp:5]: (warning) Passing values 1.0 and 0 to fmodl() leads to implementation-defined result.\n", errout.str());

 check("void foo()\n"
 "{\n"
 " std::cout << fmod(1.0,1) << std::endl;\n"
 " std::cout << fmodf(1.0,1) << std::endl;\n"
 " std::cout << fmodl(1.0,1) << std::endl;\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void mathfunctionCall_precision() {
 check("void foo() {\n"
 " print(exp(x) - 1);\n"
 " print(log(1 + x));\n"
 " print(1 - erf(x));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
 "[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
 "[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());

 check("void foo() {\n"
 " print(exp(x) - 1.0);\n"
 " print(log(1.0 + x));\n"
 " print(1.0 - erf(x));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
 "[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
 "[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());

 check("void foo() {\n"
 " print(exp(3 + x*f(a)) - 1);\n"
 " print(log(x*4 + 1));\n"
 " print(1 - erf(34*x + f(x) - c));\n"
 "}");
 ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
 "[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
 "[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());

 check("void foo() {\n"
 " print(2*exp(x) - 1);\n"
 " print(1 - erf(x)/2.0);\n"
 "}");
 ASSERT_EQUALS("", errout.str());
 }

 void checkIgnoredReturnValue() {
 Settings settings2;
 settings2.addEnabled("warning");
 const char xmldata[] = "<?xml version=\"1.0\"?>\n"
 "<def version=\"2\">\n"
 " <function name=\"mystrcmp,foo::mystrcmp\">\n"
 " <use-retval/>\n"
 " <arg nr=\"1\"/>\n"
 " <arg nr=\"2\"/>\n"
 " </function>\n"
 "</def>";
 tinyxml2::XMLDocument doc;
 doc.Parse(xmldata, sizeof(xmldata));
 settings2.library.load(doc);

 check("void foo() {\n"
 " mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("[test.cpp:2]: (warning) Return value of function mystrcmp() is not used.\n", errout.str());

 check("void foo() {\n"
 " foo::mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("[test.cpp:2]: (warning) Return value of function foo::mystrcmp() is not used.\n", errout.str());

 check("void f() {\n"
 " foo x;\n"
 " x.mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function x.mystrcmp() is not used.\n", errout.str());

 check("bool mystrcmp(char* a, char* b);\n" // cppcheck sees a custom strcmp definition, but it returns a value. Assume it is the one specified in the library.
 "void foo() {\n"
 " mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("[test.cpp:3]: (warning) Return value of function mystrcmp() is not used.\n", errout.str());

 check("void mystrcmp(char* a, char* b);\n" // cppcheck sees a custom strcmp definition which returns void!
 "void foo() {\n"
 " mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n"
 " class mystrcmp { mystrcmp() {} };\n" // strcmp is a constructor definition here
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n"
 " return mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n"
 " return foo::mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n"
 " if(mystrcmp(a, b));\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n"
 " bool b = mystrcmp(a, b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 // #6194
 check("void foo() {\n"
 " MyStrCmp mystrcmp(x, y);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 // #6197
 check("void foo() {\n"
 " abc::def.mystrcmp(a,b);\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 // #6233
 check("int main() {\n"
 " auto lambda = [](double value) {\n"
 " double rounded = floor(value + 0.5);\n"
 " printf(\"Rounded value = %f\\n\", rounded);\n"
 " };\n"
 " lambda(13.3);\n"
 " return 0;\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 // #6669
 check("void foo(size_t size) {\n"
 " void * res{malloc(size)};\n"
 "}");
 ASSERT_EQUALS("", errout.str());

 // #7447
 check("void foo() {\n"
 " int x{mystrcmp(a,b)};\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 // #7905
 check("void foo() {\n"
 " int x({mystrcmp(a,b)});\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("", errout.str());

 check("void foo() {\n" // don't crash
 " DEBUG(123)(mystrcmp(a,b))(fd);\n"
 "}", "test.c", &settings2);
 check("struct teststruct {\n"
 " int testfunc1() __attribute__ ((warn_unused_result)) { return 1; }\n"
 " [[nodiscard]] int testfunc2() { return 1; }\n"
 " void foo() { testfunc1(); testfunc2(); }\n"
 "};\n"
 "int main() {\n"
 " teststruct TestStruct1;\n"
 " TestStruct1.testfunc1();\n"
 " TestStruct1.testfunc2();\n"
 "}", "test.cpp", &settings2);
 ASSERT_EQUALS("[test.cpp:4]: (warning) Return value of function testfunc1() is not used.\n"
 "[test.cpp:4]: (warning) Return value of function testfunc2() is not used.\n"
 "[test.cpp:8]: (warning) Return value of function TestStruct1.testfunc1() is not used.\n"
 "[test.cpp:9]: (warning) Return value of function TestStruct1.testfunc2() is not used.\n", errout.str());

 // #9006
 check("template <typename... a> uint8_t b(std::tuple<uint8_t> d) {\n"
 " std::tuple<a...> c{std::move(d)};\n"
 " return std::get<0>(c);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 check("struct A { int x; };\n"
 "template <class... Ts>\n"
 "A f(int x, Ts... xs) {\n"
 " return {std::move(x), static_cast<int>(xs)...};\n"
 "}\n"
 "A g() { return f(1); }\n");
 ASSERT_EQUALS("", errout.str());
 }

 void memsetZeroBytes() {
 check("void f() {\n"
 " memset(p, 10, 0x0);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());

 check("void f() {\n"
 " memset(p, sizeof(p), 0);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());

 check("void f() {\n"
 " memset(p, sizeof(p), i);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 // #6269 false positives in case of overloaded standard library functions
 check("class c {\n"
 " void memset( int i );\n"
 " void f( void ) {\n"
 " memset( 0 );\n"
 " }\n"
 "};");
 ASSERT_EQUALS("", errout.str());

 // #7285
 check("void f() {\n"
 " memset(&tm, sizeof(tm), 0);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes.\n", errout.str());

 }

 void memsetInvalid2ndParam() {
 check("void f() {\n"
 " int* is = new int[10];\n"
 " memset(is, 1.0f, 40);\n"
 " int* is2 = new int[10];\n"
 " memset(is2, 0.1f, 40);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:3]: (portability) The 2nd memset() argument '1.0f' is a float, its representation is implementation defined.\n"
 "[test.cpp:5]: (portability) The 2nd memset() argument '0.1f' is a float, its representation is implementation defined.\n", errout.str());

 check("void f() {\n"
 " int* is = new int[10];\n"
 " float g = computeG();\n"
 " memset(is, g, 40);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument 'g' is a float, its representation is implementation defined.\n", errout.str());

 check("void f() {\n"
 " int* is = new int[10];\n"
 " memset(is, 0.0f, 40);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 check("void f() {\n" // FP
 " float x = 2.3f;\n"
 " memset(a, (x?64:0), 40);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 check("void f() {\n"
 " short ss[] = {1, 2};\n"
 " memset(ss, 256, 4);\n"
 " short ss2[2];\n"
 " memset(ss2, -129, 4);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:3]: (warning) The 2nd memset() argument '256' doesn't fit into an 'unsigned char'.\n"
 "[test.cpp:5]: (warning) The 2nd memset() argument '-129' doesn't fit into an 'unsigned char'.\n", errout.str());

 check("void f() {\n"
 " int is[10];\n"
 " memset(is, 0xEE, 40);\n"
 " unsigned char* cs = malloc(256);\n"
 " memset(cs, -1, 256);\n"
 " short* ss[30];\n"
 " memset(ss, -128, 60);\n"
 " char cs2[30];\n"
 " memset(cs2, 255, 30);\n"
 " char cs3[30];\n"
 " memset(cs3, 0, 30);\n"
 "}\n");
 ASSERT_EQUALS("", errout.str());

 check("void f() {\n"
 " int is[10];\n"
 " const int i = g();\n"
 " memset(is, 1.0f + i, 40);\n"
 "}\n");
 ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument '1.0f+i' is a float, its representation is implementation defined.\n", errout.str());
 }
};

REGISTER_TEST(TestFunctions)