diff packages/language/c/libc/current/src/stdio/input/gets.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
parents
children 443894e2e912
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+//===========================================================================
+//
+//      gets.cxx
+//
+//      ANSI Stdio gets() function
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+// Include the C library? And do we want the stdio stuff?
+#if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO)
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions
+#include <stddef.h>                 // NULL and size_t from compiler
+#include <stdio.h>                  // header for this file
+#include <errno.h>                  // error codes
+#include <limits.h>                 // UINT_MAX
+#include "clibincl/stdiosupp.hxx"   // Support functions for stdio
+#include "clibincl/stream.hxx"      // Cyg_StdioStream
+
+// EXPORTED SYMBOLS
+
+externC char *
+gets( char * ) CYGPRI_LIBC_WEAK_ALIAS("_gets");
+
+// FUNCTIONS
+
+externC char *
+_gets( char *s )
+{
+    Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stdin;
+    cyg_ucount32 bytes_read;
+    Cyg_ErrNo err;
+    
+
+    err = real_stream->read( (cyg_uint8 *)s, UINT_MAX, &bytes_read );
+
+    if (!err && !bytes_read)  // if no err, but nothing to read, try again
+    {
+        real_stream->refill_read_buffer();
+        err = real_stream->read( (cyg_uint8 *)s, UINT_MAX, &bytes_read );
+
+    } // if
+
+    if (err)
+    {
+        real_stream->set_error( err );
+        errno = err;
+        return NULL;
+    } // if
+    
+    if (bytes_read > 0)
+    {
+        // NULL terminate it
+        if (s[bytes_read-1] == '\n')
+            s[bytes_read-1] = '\0';
+        else
+            s[bytes_read]='\0'; 
+    } // if
+
+    return s;
+
+} // _gets()
+
+#endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO)
+
+// EOF gets.cxx