casadm: Add missing safeclib files

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

casadm/safeclib/strremovews_s.c

@@ -0,0 +1,163 @@
+/*------------------------------------------------------------------
+ * strremovews_s.c
+ *
+ * November 2008, Bo Berry
+ *
+ * Copyright (c) 2008-2011 by Cisco Systems, Inc
+ * All rights resevered.
+ *
+ * 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
+ *    strremovews_s
+ *
+ * SYNOPSIS
+ *    #include "safe_str_lib.h"
+ *    errno_t
+ *    strremovews_s(char *dest, rsize_t dmax)
+ *
+ * DESCRIPTION
+ *    Removes beginning and trailing whitespace from the string pointed to by
+ *    dest by shifting the text left over writting the beginning whitespace.
+ *    The shifted-trimmed text is null terminated.
+ *
+ *    The text is shifted so the original pointer can continue to be used. This
+ *    is useful when the memory was malloc'ed and will need to be freed.
+ *
+ * EXTENSION TO
+ *    ISO/IEC TR 24731, Programming languages, environments
+ *    and system software interfaces, Extensions to the C Library,
+ *    Part I: Bounds-checking interfaces
+ *
+ * INPUT PARAMETERS
+ *    dest    pointer to string to remove whitespace
+ *
+ *    dmax    restricted maximum length of string
+ *
+ * RUNTIME CONSTRAINTS
+ *    dest shall not be a null pointer.
+ *    dmax shall not be 0
+ *    dmax shall not be greater than RSIZE_MAX_STR
+ *    dest shall be null terminated
+ *
+ * RETURN VALUE
+ *    EOK
+ *    ESNULLP     NULL pointer
+ *    ESZEROL     zero length
+ *    ESLEMAX     length exceeds max limit
+ *    ESUNTERM    dest was not null terminated
+ *
+ * SEE ALSO
+ *    strljustify_s(),
+ *
+ */
+errno_t
+strremovews_s (char *dest, rsize_t dmax)
+{
+    char *orig_dest;
+    char *orig_end;
+    rsize_t orig_dmax;
+
+    if (dest == NULL) {
+        invoke_safe_str_constraint_handler("strremovews_s: dest is null",
+                   NULL, ESNULLP);
+        return (ESNULLP);
+    }
+
+    if (dmax == 0 ) {
+        invoke_safe_str_constraint_handler("strremovews_s: dmax is 0",
+                   NULL, ESZEROL);
+        return (ESZEROL);
+    }
+
+    if (dmax > RSIZE_MAX_STR) {
+        invoke_safe_str_constraint_handler("strremovews_s: dmax exceeds max",
+                   NULL, ESLEMAX);
+        return (ESLEMAX);
+    }
+
+    /*
+     * corner case, a dmax of one requires a null
+     */
+    if (*dest == '\0' || dmax <= RSIZE_MIN_STR) {
+        *dest = '\0';
+        return (EOK);
+    }
+
+    orig_dest = dest;
+    orig_dmax = dmax;
+
+     /*
+      * scan the string to be sure it is properly terminated
+      */
+     while (*dest) {
+        if (dmax == 0) {
+            while (orig_dmax) { *orig_dest++ = '\0';  orig_dmax--; }
+
+            invoke_safe_str_constraint_handler(
+                      "strremovews_s: dest is unterminated",
+                       NULL, ESUNTERM);
+            return (ESUNTERM);
+        }
+        dmax--;
+        dest++;
+    }
+
+    /*
+     * find first non-white space char
+     */
+    orig_end = dest-1;
+    dest = orig_dest;
+    while ((*dest == ' ') || (*dest == '\t')) {
+        dest++;
+    }
+
+    /*
+     * shift the text over the leading spaces
+     */
+    if (orig_dest != dest && *dest) {
+        while (*dest) {
+            *orig_dest++ = *dest;
+            *dest++ = ' ';
+        }
+        *dest = '\0';
+     }
+
+    /*
+     * strip trailing whitespace
+     */
+    dest = orig_end;
+    while ((*dest == ' ') || (*dest == '\t')) {
+        *dest = '\0';
+        dest--;
+    }
+
+    return (EOK);
+}