Make improvements

third_party/gdtoa/strtopd.c

@@ -0,0 +1,55 @@
+#include "third_party/gdtoa/gdtoaimp.h"
+
+/* clang-format off */
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998 by Lucent Technologies
+All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of Lucent or any of its entities
+not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior
+permission.
+
+LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+
+****************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to ".").	*/
+
+ int
+#ifdef KR_headers
+strtopd(s, sp, d) char *s; char **sp; double *d;
+#else
+strtopd(CONST char *s, char **sp, double *d)
+#endif
+{
+	static const FPI fpi0 = { 53, 1-1023-53+1, 2046-1023-53+1, 1, SI, 0 /*unused*/ };
+	ULong bits[2];
+	Long exp;
+	int k;
+#ifdef Honor_FLT_ROUNDS
+#include "third_party/gdtoa/gdtoa_fltrnds.inc"
+#else
+#define fpi &fpi0
+#endif
+
+	k = strtodg(s, sp, fpi, &exp, bits);
+	ULtod((ULong*)d, bits, exp, k);
+	return k;
+	}