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 2013-04-01 10:56:44 +11:00
parent 87d4220f7a
commit 7fdaf28b12
3 changed files with 2601 additions and 978 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1446
exprtk.hpp
View File

File diff suppressed because it is too large Load Diff

2104
exprtk_test.cpp
View File

File diff suppressed because it is too large Load Diff

29
readme.txt
View File

@ -160,6 +160,14 @@ Expression Library can be found at:
| and | Logical AND, True only if x and y are both true. | | and | Logical AND, True only if x and y are both true. |
| | (eg: x and y) | | | (eg: x and y) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| mand | Multi-input logical AND, True only if all inputs are |
| | true. Left to right short-circuiting of expressions. |
| | (eg: mand(x > y,z < w,u or v,w and x)) |
+-----------|--------------------------------------------------------+
| mor | Multi-input logical OR, True if at least one of the |
| | inputs are true. Left to right short-circuiting of |
| | expressions. (eg: mand(x > y,z < w,u or v,w and x)) |
+-----------+--------------------------------------------------------+
| nand | Logical NAND, True only if either x or y is false. | | nand | Logical NAND, True only if either x or y is false. |
| | (eg: x nand y) | | | (eg: x nand y) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
@ -179,6 +187,12 @@ Expression Library can be found at:
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| if | If x is true then return y else return z. | | if | If x is true then return y else return z. |
| | (eg: if(x, y, z) or if((x + 1) > 2y, z + 1, w / v)) | | | (eg: if(x, y, z) or if((x + 1) > 2y, z + 1, w / v)) |
+-----------|--------------------------------------------------------+
| & | Similar to AND but with left to right expression short |
| | circuiting optimisation. (eg: (x & y) == (y and x)) |
+-----------|--------------------------------------------------------+
| | | Similar to OR but with left to right expression short |
| | circuiting optimisation. (eg: (x | y) == (y or x)) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
(3) General Purpose Functions (3) General Purpose Functions
@ -188,7 +202,7 @@ Expression Library can be found at:
| abs | Absolute value of x. | | abs | Absolute value of x. |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| avg | Average of all the inputs. | | avg | Average of all the inputs. |
| | (eg: avg(x,y,z,w) == (x+y+z+w)/4) | | | (eg: avg(x,y,z,w,u,v) == (x+y+z+w+u+v)/6) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| ceil | Smallest integer that is greater than or equal to x. | | ceil | Smallest integer that is greater than or equal to x. |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
@ -219,9 +233,12 @@ Expression Library can be found at:
| logn | Base N logarithm of x (eg: logn(1235,8)) | | logn | Base N logarithm of x (eg: logn(1235,8)) |
| | where n > 0 and is an integer. | | | where n > 0 and is an integer. |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| max | Largest value of all the inputs. (eg: max(x,y,z,w)) | | max | Largest value of all the inputs. (eg: max(x,y,z,w,u,v))|
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| min | Smallest value of all the inputs. (eg: min(x,y,z,w)) | | min | Smallest value of all the inputs. (eg: min(x,y,z,w,u)) |
+-----------+--------------------------------------------------------+
| mul | Product of all the inputs. |
| | (eg: mul(x,y,z,w,u,v,t) == (x*y*z*w*u*v*t)) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| nequal | Not-equal test between x and y using normalized epsilon| | nequal | Not-equal test between x and y using normalized epsilon|
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
@ -238,7 +255,7 @@ Expression Library can be found at:
| sqrt | Square root of x, where x > 0 | | sqrt | Square root of x, where x > 0 |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| sum | Sum of all the inputs. | | sum | Sum of all the inputs. |
| | (eg: sum(x,y,z,w,v) == (x+y+z+w+v)) | | | (eg: sum(x,y,z,w,u,v,t) == (x+y+z+w+u+v+t)) |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
| trunc | Integer portion of x | | trunc | Integer portion of x |
+-----------+--------------------------------------------------------+ +-----------+--------------------------------------------------------+
@ -405,7 +422,9 @@ correctly optimize such expressions for a given architecture.
be enclosed with single-quotes. be enclosed with single-quotes.
eg: 'Frankly, my dear, I don't give a damn!' eg: 'Frankly, my dear, I don't give a damn!'
(10) User defined functions can have up to 20 parameters. (10) User defined normal functions can have up to 20 parameters.
Where as user defined vararg-functions can have unlimited an
number of parameters.
(11) The inbuilt polynomial functions can be at most of degree 12. (11) The inbuilt polynomial functions can be at most of degree 12.