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author | Russ Cox <rsc@golang.org> | 2010-06-18 15:46:00 -0700 |
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committer | Russ Cox <rsc@golang.org> | 2010-06-18 15:46:00 -0700 |
commit | 21ff75bc0efc34675775168ccae118cd286f904c (patch) | |
tree | 40872ae2605d1035840d074ff7d6c1418b9113c4 /test/cmplxdivide.c | |
parent | 99b23a1e5bba7c02184e7875789e25bac21e153b (diff) | |
download | go-21ff75bc0efc34675775168ccae118cd286f904c.tar.gz go-21ff75bc0efc34675775168ccae118cd286f904c.zip |
complex divide: match C99 implementation
R=iant, ken2, r, r2, ken3
CC=golang-dev
https://golang.org/cl/1686044
Diffstat (limited to 'test/cmplxdivide.c')
-rw-r--r-- | test/cmplxdivide.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/test/cmplxdivide.c b/test/cmplxdivide.c new file mode 100644 index 0000000000..63473ba6cb --- /dev/null +++ b/test/cmplxdivide.c @@ -0,0 +1,61 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// gcc '-std=c99' cmplxdivide.c && a.out >cmplxdivide1.go + +#include <complex.h> +#include <math.h> +#include <stdio.h> +#include <string.h> + +#define nelem(x) (sizeof(x)/sizeof((x)[0])) + +double f[] = { + 0, + 1, + -1, + 2, + NAN, + INFINITY, + -INFINITY, +}; + +char* +fmt(double g) +{ + static char buf[10][30]; + static int n; + char *p; + + p = buf[n++]; + if(n == 10) + n = 0; + sprintf(p, "%g", g); + if(strcmp(p, "-0") == 0) + strcpy(p, "negzero"); + return p; +} + +int +main(void) +{ + int i, j, k, l; + double complex n, d, q; + + printf("// # generated by cmplxdivide.c\n"); + printf("\n"); + printf("package main\n"); + printf("var tests = []Test{\n"); + for(i=0; i<nelem(f); i++) + for(j=0; j<nelem(f); j++) + for(k=0; k<nelem(f); k++) + for(l=0; l<nelem(f); l++) { + n = f[i] + f[j]*I; + d = f[k] + f[l]*I; + q = n/d; + printf("\tTest{cmplx(%s, %s), cmplx(%s, %s), cmplx(%s, %s)},\n", fmt(creal(n)), fmt(cimag(n)), fmt(creal(d)), fmt(cimag(d)), fmt(creal(q)), fmt(cimag(q))); + } + printf("}\n"); + return 0; +} |