thomseddon / calc Goto Github PK

Support for various constants, I'm thinking:

• Pi
• e

Any more?

Sin/Cos/Tan

This could follow on nicely from Issue 1, let's see.

Support for brackets and so "sub" equations

Calc does not correctly parse expressions that start with a zero, like 0+1.
To correct this I've added one clause && strStart == str to the if below

int main(int argc, char *argv[])
{
   ...
   /* Tokenise */
      } else if ((number = strtold(str, &str)) == 0.0L && (number = strtoconst(str, &str)) == 0.0L && strStart == str) {
         /* NaN */                                                  
         insertToken(currentScope, OP, normalise(*str), 0);         
      ...

If no number is recognized by strtold(), the return value is 0.0L and the complete string remains unrecognized (strStart == str). An actual number of 0 will increase str by contrast and thus skip /* NaN */ and correctly proceed to /* Number */.

Having to wrap special characters in quotation marks is really annoying, come up with something smarter