merge sources into single tree

1 files changed, 39 insertions, 0 deletions

diff --git a/src/math/pow.c b/src/math/pow.c
new file mode 100644
index 00000000..4fb3aa2a
--- /dev/null
+++ b/src/math/pow.c
@@ -0,0 +1,39 @@
+# define TGSOURCE "pow.c"
+#include <math.h>
+#include "nonstd/tgmath.h"
+#include "errno.h"
+
+/** exponentiation **/
+TYPE TGFN(pow)(TYPE x, TYPE y)
+{
+	if (x < 0 /* && !isintegral(y) */) {
+		errno = EDOM; /* ARGUMENT(x) is negative and ARGUMENT(y) is not an integer */
+		return TGHUGE;
+	}
+
+	if (x == 0 && y <= 0) {
+		errno = EDOM; /* ARGUMENT(x) is LITERAL(0) and ARGUMENT(y) is less than or equal to LITERAL(0) */
+		return TGHUGE;
+	}
+
+	if (0) {
+		errno = ERANGE; /* The result cannot be represented */
+		/* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */
+		return TGHUGE;
+	}
+
+	/* RETURN_SUCCESS(POW(ARGUMENT(x), ARGUMENT(y))); */
+	return x * y;
+}
+
+/***
+compute ARGUMENT(x) raised to the power ARGUMENT(y).
+***/
+
+/*
+IMPLEMENTATION(The value returned on a domain error, CONSTANT(HUGE_VAL))
+LINK(m)
+*/
+/*
+STDC(1)
+*/