Import strtoi() and strtou() functions from NetBSD

src/strtou.c

@@ -0,0 +1,97 @@
+/*	$NetBSD: _strtoi.h,v 1.2 2015/01/18 17:55:22 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Original version ID:
+ * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp
+ *
+ * Created by Kamil Rytarowski, based on ID:
+ * NetBSD: src/common/lib/libc/stdlib/_strtoul.h,v 1.7 2013/05/17 12:55:56 joe…
+ */
+
+#include <sys/cdefs.h>
+
+#include <stddef.h>
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#define _DIAGASSERT(t)
+
+uintmax_t
+strtou(const char *__restrict nptr,
+       char **__restrict endptr, int base,
+       uintmax_t lo, uintmax_t hi, int *rstatus)
+{
+	int serrno;
+	uintmax_t im;
+	char *ep;
+	int rep;
+
+	_DIAGASSERT(hi >= lo);
+
+	_DIAGASSERT(nptr != NULL);
+	/* endptr may be NULL */
+
+	if (endptr == NULL)
+		endptr = &ep;
+
+	if (rstatus == NULL)
+		rstatus = &rep;
+
+	serrno = errno;
+	errno = 0;
+
+	im = strtoumax(nptr, endptr, base);
+
+	*rstatus = errno;
+	errno = serrno;
+
+	if (*rstatus == 0) {
+		/* No digits were found */
+		if (nptr == *endptr)
+			*rstatus = ECANCELED;
+		/* There are further characters after number */
+		else if (**endptr != '\0')
+			*rstatus = ENOTSUP;
+	}
+
+	if (im < lo) {
+		if (*rstatus == 0)
+			*rstatus = ERANGE;
+		return lo;
+	}
+	if (im > hi) {
+		if (*rstatus == 0)
+			*rstatus = ERANGE;
+		return hi;
+	}
+
+	return im;
+}