casadm: Add missing safeclib files

Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com>

casadm/safeclib/strnterminate_s.c

@@ -0,0 +1,112 @@
+/*------------------------------------------------------------------
+ * strnterminate_s.c
+ *
+ * February 2011, Bo Berry
+ *
+ * Copyright (c) 2011 by Cisco Systems, Inc
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *------------------------------------------------------------------
+ */
+
+#include "safeclib_private.h"
+#include "safe_str_constraint.h"
+#include "safe_str_lib.h"
+
+
+/**
+ * NAME
+ *    strnterminate_s
+ *
+ * SYNOPSIS
+ *    #include "safe_str_lib.h"
+ *    rsize_t
+ *    strnterminate_s(char *dest, rsize_t dmax)
+ *
+ * DESCRIPTION
+ *    The strnterminate_s function will terminate the string if a
+ *    null is not encountered before dmax characters.
+ *
+ * EXTENSION TO
+ *    ISO/IEC TR 24731-1, Programming languages, environments
+ *    and system software interfaces, Extensions to the C Library,
+ *    Part I: Bounds-checking interfaces
+ *
+ * INPUT PARAMETERS
+ *    dest - pointer to string
+ *
+ *    dmax - restricted maximum length
+ *
+ * OUTPUT PARAMETERS
+ *    dest - dest is terminated if needed
+ *
+ * RUNTIME CONSTRAINTS
+ *    dest shall not be a null pointer
+ *    dmax shall not be greater than RSIZE_MAX_STR
+ *    dmax shall not equal zero
+ *
+ * RETURN VALUE
+ *    The function returns a terminated string.  If a null is not
+ *    encountered prior to dmax characters, the dmax character is
+ *    set to null terminating the string. The string length is
+ *    also returned.
+ *
+ * ALSO SEE
+ *    strnlen_s()
+ *
+ */
+rsize_t
+strnterminate_s (char *dest, rsize_t dmax)
+{
+    rsize_t count;
+
+    if (dest == NULL) {
+        return (0);
+    }
+
+    if (dmax == 0) {
+        invoke_safe_str_constraint_handler("strnterminate_s: dmax is 0",
+                   NULL, ESZEROL);
+        return (0);
+    }
+
+    if (dmax > RSIZE_MAX_STR) {
+        invoke_safe_str_constraint_handler("strnterminate_s: dmax exceeds max",
+                   NULL, ESLEMAX);
+        return (0);
+    }
+
+    count = 0;
+    while (dmax > 1) {
+        if (*dest) {
+            count++;
+            dmax--;
+            dest++;
+        } else {
+            break;
+        }
+    }
+    *dest = '\0';
+
+    return (count);
+}