X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=moebius2.git;a=blobdiff_plain;f=common.h;h=6414303ad755c8234366e5990e450441f2b2dbd7;hp=7e70a752666e8ad45ee485451bbb13b72d2cd6cb;hb=fab7a4f05e75dcccb7ed7ac6c963725a39db61ae;hpb=4f9769b263b5e16c9c94ed3aba3829678a504261

diff --git a/common.h b/common.h
index 7e70a75..6414303 100644
--- a/common.h
+++ b/common.h
@@ -8,6 +8,9 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 1000
+#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -36,8 +39,12 @@ double hypotD2(const double p[D3], const double q[D3]);
 double hypotD2plus(const double p[D3], const double q[D3], double add);
 
 double magnD(const double pq[D3]);
+double magnD2(const double pq[D3]);
 void xprod(double r[D3], const double a[D3], const double b[D3]);
 double dotprod(const double a[D3], const double b[D3]);
+void xprod_norm(double r[D3], const double a[D3], const double b[D3],
+		double one, double absepsilon);
+void normalise(double v[D3], double one, double absepsilon);
 
 void flushoutput(void);
 void diee(const char *what);