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complex number in OpenMX code Date: 2007/12/18 20:48 Name: H. Jeong Hi. OpenMX is written by C language in which C99 standard library provide many standard functions treating complex numbers. In OpenMX code (in band calculation) complex numbers are treated by user-defined structure and functions. Also commented codes using standard library are remained in the source. My question is "What is the reason of choosing user-defined structure than standard library" Surely performance?

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Re: complex number in OpenMX code ( No.1 ) Date: 2007/12/19 04:51 Name: T.Ozaki Hi, Though most of compilers provide the standard library treating the complex number, some of comilers (for example PGI compiler) did not when I was coding. So, for portability of the code, I chose the old style. If you know that the situation has been improved largely, please let me know. Of course I prefer the C99 style to the old fashion. Regards, TO Re: complex number in OpenMX code ( No.2 ) Date: 2007/12/24 02:17 Name: Vasilii Artyukhov Been a while since my last experience with C... Couldn't it be possible to use something like ... #ifdef NO_COMPLEX <your hand-made complex type> #else <the standard C99 types> ... and use "cpp -DNO_COMPLEX" when the compiler doesn't support the complex type?

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