Importing inttypes methods from FreeBSD

[Aditya Upadhyay <aadit0402 at gmail dot com>]

Hello Developers,

I have imported these inttypes methods from FreeBSD. I have made the
strtoimax function as reentrant. I am requesting you to please review
the same and suggest me needed changes. I am porting rest of the
inttypes methods. I will send the same by late today.


Thanks & Regards,
Aditya Upadhyay

From 01214d25aea8e2501b493099468c764cda24ba3c Mon Sep 17 00:00:00 2001
From: Aditya Upadhyay <aadit0402@gmail.com>
Date: Tue, 18 Jul 2017 23:19:58 +0530
Subject: [PATCH 1/3] Importing imaxabs inttype methods from FreeBSD.

---
 newlib/libc/stdlib/Makefile.am |  1 +
 newlib/libc/stdlib/imaxabs.c   | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 newlib/libc/stdlib/imaxabs.c

diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index ebae00ab0..117d7c495 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -33,6 +33,7 @@ GENERAL_SOURCES = \
 	getenv.c  	\
 	getenv_r.c	\
 	itoa.c          \
+	imaxabs.c	\
 	labs.c 		\
 	ldiv.c  	\
 	ldtoa.c		\
diff --git a/newlib/libc/stdlib/imaxabs.c b/newlib/libc/stdlib/imaxabs.c
new file mode 100644
index 000000000..0c76e0cbe
--- /dev/null
+++ b/newlib/libc/stdlib/imaxabs.c
@@ -0,0 +1,37 @@
+/*-
+ * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdint.h>
+#include <inttypes.h>
+
+intmax_t
+imaxabs(intmax_t j)
+{
+	return (j < 0 ? -j : j);
+}
-- 
2.11.0

From fb60d75a0402e3665079f22aaa3b40d7213c009b Mon Sep 17 00:00:00 2001
From: Aditya Upadhyay <aadit0402@gmail.com>
Date: Tue, 18 Jul 2017 23:21:24 +0530
Subject: [PATCH 2/3] Importing imaxdiv inttype method from FreeBSD.

---
 newlib/libc/stdlib/Makefile.am |  1 +
 newlib/libc/stdlib/imaxdiv.c   | 48 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 newlib/libc/stdlib/imaxdiv.c

diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index 117d7c495..76a1a67e4 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -34,6 +34,7 @@ GENERAL_SOURCES = \
 	getenv_r.c	\
 	itoa.c          \
 	imaxabs.c	\
+	imaxdiv.c	\
 	labs.c 		\
 	ldiv.c  	\
 	ldtoa.c		\
diff --git a/newlib/libc/stdlib/imaxdiv.c b/newlib/libc/stdlib/imaxdiv.c
new file mode 100644
index 000000000..15d78baf4
--- /dev/null
+++ b/newlib/libc/stdlib/imaxdiv.c
@@ -0,0 +1,48 @@
+/*-
+ * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdint.h>
+#include <inttypes.h>
+
+/* See comments in div.c for implementation details. */
+imaxdiv_t
+imaxdiv(intmax_t numer, intmax_t denom)
+{
+	imaxdiv_t retval;
+
+	retval.quot = numer / denom;
+	retval.rem = numer % denom;
+#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
+	if (numer >= 0 && retval.rem < 0) {
+		retval.quot++;
+		retval.rem -= denom;
+	}
+#endif
+	return (retval);
+}
-- 
2.11.0

From f17d999ebd54b796f20f0e7a97b6d79e2f234893 Mon Sep 17 00:00:00 2001
From: Aditya Upadhyay <aadit0402@gmail.com>
Date: Tue, 18 Jul 2017 23:22:39 +0530
Subject: [PATCH 3/3] Importing strtoimax inttype method from FreeBSD.

---
 newlib/libc/stdlib/Makefile.am |   1 +
 newlib/libc/stdlib/strtoimax.c | 146 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 147 insertions(+)
 create mode 100644 newlib/libc/stdlib/strtoimax.c

diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index 76a1a67e4..6cca5f005 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -59,6 +59,7 @@ GENERAL_SOURCES = \
 	sb_charsets.c	\
 	strtod.c	\
 	strtodg.c	\
+	strtoimax.c	\
 	strtol.c	\
 	strtorx.c	\
 	strtoul.c	\
diff --git a/newlib/libc/stdlib/strtoimax.c b/newlib/libc/stdlib/strtoimax.c
new file mode 100644
index 000000000..0cb6e2acc
--- /dev/null
+++ b/newlib/libc/stdlib/strtoimax.c
@@ -0,0 +1,146 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "from @(#)strtol.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <reent.h>
+#include "../locale/setlocale.h"
+
+/*
+ * Convert a string to an intmax_t integer.
+ *
+ * Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+intmax_t
+strtoimax_l(struct _reent *rptr, const char * __restrict nptr, char ** __restrict endptr, int base,
+		locale_t loc)
+{
+	const char *s = (const unsigned char *)nptr;
+	uintmax_t acc;
+	char c;
+	uintmax_t cutoff;
+	int neg = 0, any, cutlim;
+	
+	/*
+	 * Skip white space and pick up leading +/- sign if any.
+	 * If base is 0, allow 0x for hex and 0 for octal, else
+	 * assume decimal; if base is already 16, allow 0x.
+	 */
+	do {
+		c = *s++;
+	} while (isspace_l(c, loc));
+	if (c == '-') {
+		neg = 1;
+		c = *s++;
+	} else {
+		neg = 0;
+		if (c == '+')
+			c = *s++;
+	}
+	if ((base == 0 || base == 16) &&
+	    c == '0' && (*s == 'x' || *s == 'X')) {
+		c = s[1];
+		s += 2;
+		base = 16;
+	}
+	if (base == 0)
+		base = c == '0' ? 8 : 10;
+	
+	/*
+	 * Compute the cutoff value between legal numbers and illegal
+	 * numbers.  That is the largest legal value, divided by the
+	 * base.  An input number that is greater than this value, if
+	 * followed by a legal input character, is too big.  One that
+	 * is equal to this value may be valid or not; the limit
+	 * between valid and invalid numbers is then based on the last
+	 * digit.  For instance, if the range for intmax_t is
+	 * [-9223372036854775808..9223372036854775807] and the input base
+	 * is 10, cutoff will be set to 922337203685477580 and cutlim to
+	 * either 7 (neg==0) or 8 (neg==1), meaning that if we have
+	 * accumulated a value > 922337203685477580, or equal but the
+	 * next digit is > 7 (or 8), the number is too big, and we will
+	 * return a range error.
+	 *
+	 * Set 'any' if any `digits' consumed; make it negative to indicate
+	 * overflow.
+	 */
+	cutoff = neg ? -(uintmax_t)INTMAX_MIN : INTMAX_MAX;
+	cutlim = cutoff % base;
+	cutoff /= base;
+	for ( ; ; c = *s++) {
+		if (c >= '0' && c <= '9')
+			c -= '0';
+		else if (c >= 'A' && c <= 'Z')
+			c -= 'A' - 10;
+		else if (c >= 'a' && c <= 'z')
+			c -= 'a' - 10;
+		else
+			break;
+		if (c >= base)
+			break;
+		if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
+			any = -1;
+		else {
+			any = 1;
+			acc *= base;
+			acc += c;
+		}
+	}
+	if (any < 0) {
+		acc = neg ? INTMAX_MIN : INTMAX_MAX;
+		rptr->_errno = ERANGE;
+	} else if (!any) {
+noconv:
+		rptr->_errno = EINVAL;
+	} else if (neg)
+		acc = -acc;
+	if (endptr != NULL)
+		*endptr = (char *)(any ? s - 1 : nptr);
+	return (acc);
+}
+intmax_t
+strtoimax(const char * __restrict nptr, char ** __restrict endptr, int base)
+{
+	return strtoimax_l(_REENT, nptr, endptr, base, __get_current_locale ());
+}
-- 
2.11.0