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