libbsd: add strtonum(), nitems(), timespec operation functions from FreeBSD

Change-Id: I56b677b382d17a27d243b615de19bec10f3a2810
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7426
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>

headers/compatibility/bsd/stdlib.h

@@ -27,6 +27,9 @@ uint32_t	arc4random_uniform(uint32_t upper_bound);
 
 int			mkstemps(char *templat, int slen);
 
+long long	strtonum(const char *numstr, long long minval,
+				long long maxval, const char **errstrp);
+
 #ifdef __cplusplus
 }
 #endif

headers/compatibility/bsd/sys/param.h

@@ -37,6 +37,8 @@
 
 #define NBBY 8
 
+#define nitems(x)	(sizeof((x)) / sizeof((x)[0]))
+
 
 #endif
 

headers/compatibility/bsd/sys/time.h

@@ -13,6 +13,33 @@
 #ifdef _DEFAULT_SOURCE
 
 
+/* BSDish macros operating on timespec structs */
+#define	timespecadd(a, b, res)							\
+	do {												\
+		(res)->tv_sec = (a)->tv_sec + (b)->tv_sec;		\
+		(res)->tv_nsec = (a)->tv_nsec + (b)->tv_nsec;	\
+		if ((res)->tv_nsec >= 1000000000L) {			\
+			(res)->tv_nsec -= 1000000000L;				\
+			(res)->tv_sec++;							\
+		}												\
+	} while (0)
+#define	timespecsub(a, b, res)							\
+	do {												\
+		(res)->tv_sec = (a)->tv_sec - (b)->tv_sec;		\
+		(res)->tv_nsec = (a)->tv_nsec - (b)->tv_nsec;	\
+		if ((res)->tv_nsec < 0) {						\
+			(res)->tv_nsec += 1000000000L;				\
+			(res)->tv_sec--;							\
+		}												\
+	} while (0)
+#define	timespecclear(a)	((a)->tv_sec = (a)->tv_nsec = 0)
+#define	timespecisset(a)	((a)->tv_sec != 0 || (a)->tv_nsec != 0)
+#define	timespeccmp(a, b, cmp)	(((a)->tv_sec == (b)->tv_sec) \
+	? (a)->tv_nsec cmp (b)->tv_nsec : (a)->tv_sec cmp (b)->tv_sec))
+#define	timespecvalid_interval(a)	((a)->tv_sec >= 0	\
+	&& (a)->tv_nsec >= 0 && (&)->tv_nsec < 1000000000L)
+
+
 #ifdef __cplusplus
 extern "C" {
 #endif

src/libs/bsd/Jamfile

@@ -30,6 +30,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			signal.c
 			string.cpp
 			stringlist.c
+			strtonum.c
 			termios.c
 			unvis.c
 			usershell.c

src/libs/bsd/strtonum.c

@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 2004 Ted Unangst and Todd Miller
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, 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.
+ *
+ *	$OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu Exp $
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#define	INVALID		1
+#define	TOOSMALL	2
+#define	TOOLARGE	3
+
+long long
+strtonum(const char *numstr, long long minval, long long maxval,
+    const char **errstrp)
+{
+	long long ll = 0;
+	int error = 0;
+	char *ep;
+	struct errval {
+		const char *errstr;
+		int err;
+	} ev[4] = {
+		{ NULL,		0 },
+		{ "invalid",	EINVAL },
+		{ "too small",	ERANGE },
+		{ "too large",	ERANGE },
+	};
+
+	ev[0].err = errno;
+	errno = 0;
+	if (minval > maxval) {
+		error = INVALID;
+	} else {
+		ll = strtoll(numstr, &ep, 10);
+		if (errno == EINVAL || numstr == ep || *ep != '\0')
+			error = INVALID;
+		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
+			error = TOOSMALL;
+		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
+			error = TOOLARGE;
+	}
+	if (errstrp != NULL)
+		*errstrp = ev[error].errstr;
+	errno = ev[error].err;
+	if (error)
+		ll = 0;
+
+	return (ll);
+}