update CLib

git-svn-id: svn://kolibrios.org@614 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-08-28 10:31:46 +00:00
parent 52facee6d5
commit 3be3768ce0
98 changed files with 9908 additions and 0 deletions
--- a/watcom/trunk/clib/streamio/gets_s.c
+++ b/watcom/trunk/clib/streamio/gets_s.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+*
+*                            Open Watcom Project
+*
+*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
+*
+*  ========================================================================
+*
+*    This file contains Original Code and/or Modifications of Original
+*    Code as defined in and that are subject to the Sybase Open Watcom
+*    Public License version 1.0 (the 'License'). You may not use this file
+*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
+*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
+*    provided with the Original Code and Modifications, and is also
+*    available at www.sybase.com/developer/opensource.
+*
+*    The Original Code and all software distributed under the License are
+*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
+*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
+*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
+*    NON-INFRINGEMENT. Please see the License for the specific language
+*    governing rights and limitations under the License.
+*
+*  ========================================================================
+*
+* Description:  Implementation of gets_s().
+*
+****************************************************************************/
+
+#include "variety.h"
+#include "saferlib.h"
+#include <stdio.h>
+
+_WCRTLINK extern char *gets_s( char *s, rsize_t n )
+/*************************************************/
+{
+    int		c;
+    char        *cs;
+    rsize_t     len;
+    unsigned	oflag;
+
+    /* Check runtime constraint: s shall not be a null pointer */
+    if( ! __check_constraint_nullptr( s ) ) {
+        /* Just trigger the constraint handler if necessary */
+    }
+
+    /* Check runtime constraint: n shall not be zero nor
+       greater than RSIZE_MAX */
+    if(  ! __check_constraint_zero( n )
+       || ! __check_constraint_maxsize( n ) ) {
+        n = 0;
+    }
+
+    /* Filter out stream error and EOF status during this function */
+    oflag = stdin->_flag & (_SFERR | _EOF);
+    stdin->_flag &= ~(_SFERR | _EOF);
+
+    cs = s;
+    len = n;
+
+    /*
+     Read data until any of following conditions is met:
+     - Received EOF
+     - Read error
+     - New line character received
+     */
+    while( (c = getc( stdin )) != EOF
+        && (c != '\n') ) {
+        if( cs && len ) {
+            *cs++ = c;
+            len--;
+        }
+    }
+
+    /* Post-process runtime constraints, return NULL when catched */
+    if( s == NULL || n == 0) {
+        stdin->_flag |= oflag;
+        return( NULL );
+    }
+
+    /* After this point, it is assumed that s is valid and
+       contains at least one character */
+
+    /* Catch too small buffer and I/O error */
+    if( ! __check_constraint_toosmall( s, len )
+      || ferror( stdin ) ) {
+        stdin->_flag |= oflag;
+        *s = 0;
+        return( NULL );
+    }
+
+    /* Restore stream error states if they were present previously */
+    stdin->_flag |= oflag;
+
+    /* If we got EOF and didn't get any characters, return NULL */
+    if( c == EOF && cs == s ) {
+        *s = 0;
+        return( NULL );
+    }
+
+    /* Terminate string */
+    *cs = 0;
+
+    return( s );
+}