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| author | Joe Hunkeler <jhunkeler@gmail.com> | 2015-08-11 16:51:37 -0400 |
|---|---|---|
| committer | Joe Hunkeler <jhunkeler@gmail.com> | 2015-08-11 16:51:37 -0400 |
| commit | 40e5a5811c6ffce9b0974e93cdd927cbcf60c157 (patch) | |
| tree | 4464880c571602d54f6ae114729bf62a89518057 /unix/f2c/libf2c/pow_qq.c | |
| download | iraf-osx-40e5a5811c6ffce9b0974e93cdd927cbcf60c157.tar.gz | |
Repatch (from linux) of OSX IRAF
Diffstat (limited to 'unix/f2c/libf2c/pow_qq.c')
| -rw-r--r-- | unix/f2c/libf2c/pow_qq.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/unix/f2c/libf2c/pow_qq.c b/unix/f2c/libf2c/pow_qq.c new file mode 100644 index 00000000..09fe18ec --- /dev/null +++ b/unix/f2c/libf2c/pow_qq.c @@ -0,0 +1,39 @@ +#include "f2c.h" +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef KR_headers +longint pow_qq(ap, bp) longint *ap, *bp; +#else +longint pow_qq(longint *ap, longint *bp) +#endif +{ + longint pow, x, n; + unsigned long long u; /* system-dependent */ + + x = *ap; + n = *bp; + + if (n <= 0) { + if (n == 0 || x == 1) + return 1; + if (x != -1) + return x == 0 ? 1/x : 0; + n = -n; + } + u = n; + for(pow = 1; ; ) + { + if(u & 01) + pow *= x; + if(u >>= 1) + x *= x; + else + break; + } + return(pow); + } +#ifdef __cplusplus +} +#endif |