Fix/eliminate use of atol

1 files changed, 92 insertions, 0 deletions

diff --git a/libbb/safe_strtol.c b/libbb/safe_strtol.c
new file mode 100644
index 000000000..fcbdba878
--- /dev/null
+++ b/libbb/safe_strtol.c
@@ -0,0 +1,92 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <assert.h>
+#include "libbb.h"
+
+#ifdef L_safe_strtoi
+extern
+int safe_strtoi(char *arg, int* value)
+{
+	int error;
+	long lvalue = *value;
+	error = safe_strtol(arg, &lvalue);
+	*value = (int) lvalue;
+	return error;
+}
+#endif
+
+#ifdef L_safe_strtod
+extern
+int safe_strtod(char *arg, double* value)
+{
+	char *endptr;
+	int errno_save = errno;
+
+	assert(arg!=NULL);
+	errno = 0;
+	*value = strtod(arg, &endptr);
+	if (errno != 0 || *endptr!='\0' || endptr==arg) {
+		return 1;
+	}
+	errno = errno_save;
+	return 0;
+}
+#endif
+
+#ifdef L_safe_strtol
+extern
+int safe_strtol(char *arg, long* value)
+{
+	char *endptr;
+	int errno_save = errno;
+
+	assert(arg!=NULL);
+	errno = 0;
+	*value = strtol(arg, &endptr, 0);
+	if (errno != 0 || *endptr!='\0' || endptr==arg) {
+		return 1;
+	}
+	errno = errno_save;
+	return 0;
+}
+#endif
+
+#ifdef L_safe_strtoul
+extern
+int safe_strtoul(char *arg, unsigned long* value)
+{
+	char *endptr;
+	int errno_save = errno;
+
+	assert(arg!=NULL);
+	errno = 0;
+	*value = strtoul(arg, &endptr, 0);
+	if (errno != 0 || *endptr!='\0' || endptr==arg) {
+		return 1;
+	}
+	errno = errno_save;
+	return 0;
+}
+#endif
+