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| author | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-07-08 20:46:52 -0400 |
|---|---|---|
| committer | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-07-08 20:46:52 -0400 |
| commit | fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 (patch) | |
| tree | bdda434976bc09c864f2e4fa6f16ba1952b1e555 /unix/f2c/libf2c/c_log.c | |
| download | iraf-linux-fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4.tar.gz | |
Initial commit
Diffstat (limited to 'unix/f2c/libf2c/c_log.c')
| -rw-r--r-- | unix/f2c/libf2c/c_log.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/unix/f2c/libf2c/c_log.c b/unix/f2c/libf2c/c_log.c new file mode 100644 index 00000000..a0ba3f0d --- /dev/null +++ b/unix/f2c/libf2c/c_log.c @@ -0,0 +1,23 @@ +#include "f2c.h" + +#ifdef KR_headers +extern double log(), f__cabs(), atan2(); +VOID c_log(r, z) complex *r, *z; +#else +#undef abs +#include "math.h" +#ifdef __cplusplus +extern "C" { +#endif +extern double f__cabs(double, double); + +void c_log(complex *r, complex *z) +#endif +{ + double zi, zr; + r->i = atan2(zi = z->i, zr = z->r); + r->r = log( f__cabs(zr, zi) ); + } +#ifdef __cplusplus +} +#endif |