xfygogo
/
exprtk
mirror of https://github.com/ArashPartow/exprtk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

This commit is contained in:
Arash Partow 2018-03-11 12:00:26 +11:00
parent 56cb1186b7
commit 55759bb04c
3 changed files with 31 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Makefile
View File

@ -24,7 +24,8 @@ LINKER_OPT := -L/usr/lib -lstdc++ -lm
ASAN_OPT := -g -fsanitize=address -fno-omit-frame-pointer ASAN_OPT := -g -fsanitize=address -fno-omit-frame-pointer
MSAN_OPT := -g -fsanitize=memory -fno-omit-frame-pointer MSAN_OPT := -g -fsanitize=memory -fno-omit-frame-pointer
LSAN_OPT := -g -fsanitize=leak -fno-omit-frame-pointer LSAN_OPT := -g -fsanitize=leak -fno-omit-frame-pointer
BUILD_SRC := $(wildcard exprtk_*.cpp) USAN_OPT := -g -fsanitize=undefined -fno-omit-frame-pointer
BUILD_SRC := $(sort $(wildcard exprtk_*.cpp))
BUILD_LIST := $(BUILD_SRC:%.cpp=%) BUILD_LIST := $(BUILD_SRC:%.cpp=%)

12
exprtk.hpp
View File

@ -67,7 +67,7 @@ namespace exprtk
#define exprtk_error_location \ #define exprtk_error_location \
"exprtk.hpp:" + details::to_str(__LINE__) \ "exprtk.hpp:" + details::to_str(__LINE__) \
#if __GNUC__ >= 7 #if defined(__GNUC__) && (__GNUC__ >= 7)
#define exprtk_disable_fallthrough_begin \ #define exprtk_disable_fallthrough_begin \
_Pragma ("GCC diagnostic push") \ _Pragma ("GCC diagnostic push") \
@ -1320,8 +1320,8 @@ namespace exprtk
template <typename T> inline T frac_impl(const T v, real_type_tag) { return (v - static_cast<long long>(v)); } template <typename T> inline T frac_impl(const T v, real_type_tag) { return (v - static_cast<long long>(v)); }
template <typename T> inline T trunc_impl(const T v, real_type_tag) { return T(static_cast<long long>(v)); } template <typename T> inline T trunc_impl(const T v, real_type_tag) { return T(static_cast<long long>(v)); }
template <typename T> inline T const_pi_impl(real_type_tag) { return numeric::constant::pi; } template <typename T> inline T const_pi_impl(real_type_tag) { return T(numeric::constant::pi); }
template <typename T> inline T const_e_impl (real_type_tag) { return numeric::constant::e; } template <typename T> inline T const_e_impl (real_type_tag) { return T(numeric::constant::e); }
template <typename T> inline T abs_impl(const T v, int_type_tag) { return ((v >= T(0)) ? v : -v); } template <typename T> inline T abs_impl(const T v, int_type_tag) { return ((v >= T(0)) ? v : -v); }
template <typename T> inline T exp_impl(const T v, int_type_tag) { return std::exp (v); } template <typename T> inline T exp_impl(const T v, int_type_tag) { return std::exp (v); }
@ -2780,7 +2780,7 @@ namespace exprtk
Note: The following 'awkward' conditional is Note: The following 'awkward' conditional is
due to various broken msvc compilers. due to various broken msvc compilers.
*/ */
#if _MSC_VER == 1600 #if defined(_MSC_VER) && (_MSC_VER == 1600)
const bool within_range = !is_end(s_itr_ + 2) && const bool within_range = !is_end(s_itr_ + 2) &&
!is_end(s_itr_ + 3) ; !is_end(s_itr_ + 3) ;
#else #else
@ -5963,12 +5963,10 @@ namespace exprtk
else else
return ((T(2) * arg1 <= (arg2 + arg0)) ? arg0 : arg2); return ((T(2) * arg1 <= (arg2 + arg0)) ? arg0 : arg2);
default : { default : exprtk_debug(("trinary_node::value() - Error: Invalid operation\n"));
exprtk_debug(("trinary_node::value() - Error: Invalid operation\n"));
return std::numeric_limits<T>::quiet_NaN(); return std::numeric_limits<T>::quiet_NaN();
} }
} }
}
inline typename expression_node<T>::node_type type() const inline typename expression_node<T>::node_type type() const
{ {

7
exprtk_simple_example_10.cpp
View File

@ -47,7 +47,7 @@ void newton_sqrt()
"newton_sqrt", "newton_sqrt",
" switch " " switch "
" { " " { "
" case x < 0 : -inf; " " case x < 0 : null; "
" case x == 0 : 0; " " case x == 0 : 0; "
" case x == 1 : 1; " " case x == 1 : 1; "
" default: " " default: "
@ -55,9 +55,10 @@ void newton_sqrt()
" var z := 100; " " var z := 100; "
" var sqrt_x := x / 2; " " var sqrt_x := x / 2; "
" repeat " " repeat "
" sqrt_x := (1 / 2) * (sqrt_x + (x / sqrt_x)); "
" if (equal(sqrt_x^2, x)) " " if (equal(sqrt_x^2, x)) "
" break[sqrt_x]; " " break[sqrt_x]; "
" else "
" sqrt_x := (1 / 2) * (sqrt_x + (x / sqrt_x)); "
" until ((z -= 1) <= 0); " " until ((z -= 1) <= 0); "
" }; " " }; "
" } ", " } ",
@ -77,7 +78,7 @@ void newton_sqrt()
T result = expression.value(); T result = expression.value();
printf("sqrt(%03d) - Result: %12.10f\tReal: %12.10f\n", printf("sqrt(%03d) - Result: %15.13f\tReal: %15.13f\n",
static_cast<unsigned int>(i), static_cast<unsigned int>(i),
result, result,
std::sqrt(x)); std::sqrt(x));