1 files changed, 123 insertions, 0 deletions
diff --git a/local/strutils.c b/local/strutils.c
new file mode 100644
index 0000000..e5245db
--- /dev/null
+++ b/local/strutils.c
@@ -0,0 +1,123 @@
+/*
+ * strutils.c - various string routines shared by commands
+ * This file was copied from util-linux at fall 2011.
+ *
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
+ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "c.h"
+#include "strutils.h"
+
+/*
+ * same as strtol(3) but exit on failure instead of returning crap
+ */
+long strtol_or_err(const char *str, const char *errmesg)
+{
+	long num;
+	char *end = NULL;
+
+	if (str != NULL && *str != '\0') {
+		errno = 0;
+		num = strtol(str, &end, 10);
+		if (errno == 0 && str != end && end != NULL && *end == '\0')
+			return num;
+	}
+	error(EXIT_FAILURE, errno, "%s: '%s'", errmesg, str);
+	return 0;
+}
+
+/*
+ * same as strtod(3) but exit on failure instead of returning crap
+ */
+double strtod_or_err(const char *str, const char *errmesg)
+{
+	double num;
+	char *end = NULL;
+
+	if (str != NULL && *str != '\0') {
+		errno = 0;
+		num = strtod(str, &end);
+		if (errno == 0 && str != end && end != NULL && *end == '\0')
+			return num;
+	}
+	error(EXIT_FAILURE, errno, "%s: '%s'", errmesg, str);
+	return 0;
+}
+
+/*
+ * Covert a string into a double in a non-locale aware way.
+ * This means the decimal point can be either . or ,
+ * Also means you cannot use the other for thousands separator
+ *
+ * Exits on failure like its other _or_err cousins
+ */
+double strtod_nol_or_err(char *str, const char *errmesg)
+{
+    double num;
+    const char *cp, *radix;
+    double mult;
+    int negative = 0;
+
+    if (str != NULL && *str != '\0') {
+        num = 0.0;
+        cp = str;
+        /* strip leading spaces */
+        while (isspace(*cp))
+            cp++;
+
+        /* get sign */
+        if (*cp == '-') {
+            negative = 1;
+            cp++;
+        } else if (*cp == '+')
+            cp++;
+
+        /* find radix */
+        radix = cp;
+        mult=0.1;
+        while(isdigit(*radix)) {
+            radix++;
+            mult *= 10;
+        }
+        while(isdigit(*cp)) {
+            num += (*cp - '0') * mult;
+            mult /= 10;
+            cp++;
+        }
+        /* got the integers */
+        if (*cp == '\0')
+            return (negative?-num:num);
+        if (*cp != '.' && *cp != ',')
+            error(EXIT_FAILURE, EINVAL, "%s: '%s'", errmesg, str);
+
+        cp++;
+        mult = 0.1;
+        while(isdigit(*cp)) {
+            num += (*cp - '0') * mult;
+            mult /= 10;
+            cp++;
+        }
+        if (*cp == '\0')
+            return (negative?-num:num);
+    }
+    error(EXIT_FAILURE, errno, "%s: '%s'", errmesg, str);
+    return 0;
+}