compiled newlib, need to hook up the system calls

rocklibc/src/string/strcpy_s.c

@@ -0,0 +1,89 @@
+/* strcpy_s( char *, rsize_t, const char * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#define __STDC_WANT_LIB_EXT1__ 1
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifndef REGTEST
+
+errno_t strcpy_s( char * _PDCLIB_restrict s1, rsize_t s1max, const char * _PDCLIB_restrict s2 )
+{
+    char * dest = s1;
+    const char * src = s2;
+
+    if ( s1 != NULL && s2 != NULL && s1max <= RSIZE_MAX && s1max != 0 )
+    {
+        while ( s1max-- )
+        {
+            if ( dest == s2 || src == s1 )
+            {
+                goto runtime_constraint_violation;
+            }
+
+            if ( ( *dest++ = *src++ ) == '\0' )
+            {
+                return 0;
+            }
+        }
+    }
+
+runtime_constraint_violation:
+
+    if ( s1 != NULL && s1max > 0 && s1max <= RSIZE_MAX )
+    {
+        s1[0] = '\0';
+    }
+
+    _PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
+    return _PDCLIB_EINVAL;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
+
+static int HANDLER_CALLS = 0;
+
+static void test_handler( const char * _PDCLIB_restrict msg, void * _PDCLIB_restrict ptr, errno_t error )
+{
+    ++HANDLER_CALLS;
+}
+
+#endif
+
+int main( void )
+{
+#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
+    char s[] = "xxxxx";
+    set_constraint_handler_s( test_handler );
+
+    TESTCASE( strcpy_s( s, 6, "" ) == 0 );
+    TESTCASE( s[0] == '\0' );
+    TESTCASE( s[1] == 'x' );
+    TESTCASE( strcpy_s( s, 6, abcde ) == 0 );
+    TESTCASE( s[0] == 'a' );
+    TESTCASE( s[4] == 'e' );
+    TESTCASE( s[5] == '\0' );
+
+    /* Overrun. */
+    TESTCASE( strcpy_s( s, 6, "abcdef" ) != 0 );
+
+    /* Overlapping. */
+    TESTCASE( strcpy_s( s, 3, s + 2 ) != 0 );
+    TESTCASE( strcpy_s( s + 2, 3, s ) != 0 );
+
+    TESTCASE( HANDLER_CALLS == 3 );
+#endif
+    return TEST_RESULTS;
+}
+
+#endif