Martin Kroeker
798c448b0c
1. Replaced all instances of "int" with "blasint" 2. Added string length as "hidden" third parameter in calls to fortran XERBLA
110 lines
2.0 KiB
C
110 lines
2.0 KiB
C
#include "stdlib.h"
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#include "stdio.h"
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#include "signal.h"
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#include "f2c.h"
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#ifndef SIGIOT
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#ifdef SIGABRT
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#define SIGIOT SIGABRT
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#endif
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#endif
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void sig_die(const char *s, blasint kill) {
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/* print error message, then clear buffers */
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fprintf(stderr, "%s\n", s);
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if(kill) {
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fflush(stderr);
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/* now get a core */
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signal(SIGIOT, SIG_DFL);
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abort();
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} else
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exit(1);
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}
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void c_div(complex *c, complex *a, complex *b) {
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double ratio, den;
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double abr, abi, cr;
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if( (abr = b->r) < 0.)
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abr = - abr;
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if( (abi = b->i) < 0.)
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abi = - abi;
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if( abr <= abi ) {
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if(abi == 0) {
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#ifdef IEEE_COMPLEX_DIVIDE
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float af, bf;
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af = bf = abr;
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if (a->i != 0 || a->r != 0)
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af = 1.;
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c->i = c->r = af / bf;
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return;
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#else
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sig_die("complex division by zero", 1);
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#endif
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}
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ratio = (double)b->r / b->i ;
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den = b->i * (1 + ratio*ratio);
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cr = (a->r*ratio + a->i) / den;
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c->i = (a->i*ratio - a->r) / den;
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} else {
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ratio = (double)b->i / b->r ;
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den = b->r * (1 + ratio*ratio);
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cr = (a->r + a->i*ratio) / den;
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c->i = (a->i - a->r*ratio) / den;
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}
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c->r = cr;
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}
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void z_div(doublecomplex *c, doublecomplex *a, doublecomplex *b) {
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double ratio, den;
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double abr, abi, cr;
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if( (abr = b->r) < 0.)
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abr = - abr;
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if( (abi = b->i) < 0.)
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abi = - abi;
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if( abr <= abi ) {
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if(abi == 0) {
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#ifdef IEEE_COMPLEX_DIVIDE
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if (a->i != 0 || a->r != 0)
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abi = 1.;
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c->i = c->r = abi / abr;
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return;
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#else
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sig_die("complex division by zero", 1);
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#endif
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}
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ratio = b->r / b->i ;
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den = b->i * (1 + ratio*ratio);
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cr = (a->r*ratio + a->i) / den;
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c->i = (a->i*ratio - a->r) / den;
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} else {
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ratio = b->i / b->r ;
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den = b->r * (1 + ratio*ratio);
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cr = (a->r + a->i*ratio) / den;
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c->i = (a->i - a->r*ratio) / den;
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}
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c->r = cr;
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}
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float r_imag(complex *z) {
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return z->i;
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}
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void r_cnjg(complex *r, complex *z) {
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float zi = z->i;
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r->r = z->r;
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r->i = -zi;
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}
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double d_imag(doublecomplex *z) {
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return z->i;
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}
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void d_cnjg(doublecomplex *r, doublecomplex *z) {
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double zi = z->i;
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r->r = z->r;
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r->i = -zi;
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}
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