2006-02-17 Grigory Zagorodnev <grigory_zagorodnev@linux.intel.com>

gcc/ChangeLog:
     * doc/cpp.texi (__TIMESTAMP__): Document.

libcpp/ChangeLog:
     * macro.c (_cpp_builtin_macro_text): Handle BT_TIMESTAMP.
     * files.c (_cpp_get_file_stat): New function.
     * include/cpplib.h (builtin_type): Add BT_TIMESTAMP.
     * init.c (builtin_array): Add support for __TIMESTAMP__/BT_TIMESTAMP.
     * internal.h (_cpp_get_file_stat): Prototype.
     (struct cpp_buffer): Add timestamp.

gcc/testsuite/ChangeLog:
     * gcc.dg/cpp/undef3.c: New test.
     * gcc.dg/cpp/trad/builtins2.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111232 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 38 insertions, 0 deletions

diff --git a/libcpp/macro.c b/libcpp/macro.c
index 3204e553b02..67e936ee31a 100644
--- a/libcpp/macro.c
+++ b/libcpp/macro.c
@@ -123,6 +123,44 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node)
 		 NODE_NAME (node));
       break;
 
+    case BT_TIMESTAMP:
+      {
+	cpp_buffer *pbuffer = cpp_get_buffer (pfile);
+	if (pbuffer->timestamp == NULL)
+	  {
+	    /* Initialize timestamp value of the assotiated file. */
+            struct _cpp_file *file = cpp_get_file (pbuffer);
+	    if (file)
+	      {
+    		/* Generate __TIMESTAMP__ string, that represents 
+		   the date and time of the last modification 
+		   of the current source file. The string constant 
+		   looks like "Sun Sep 16 01:03:52 1973".  */
+		struct tm *tb = NULL;
+		struct stat *st = _cpp_get_file_stat (file);
+		if (st)
+		  tb = localtime (&st->st_mtime);
+		if (tb)
+		  {
+		    char *str = asctime (tb);
+		    size_t len = strlen (str);
+		    unsigned char *buf = _cpp_unaligned_alloc (pfile, len + 2);
+		    buf[0] = '"';
+		    strcpy ((char *) buf + 1, str);
+		    buf[len] = '"';
+		    pbuffer->timestamp = buf;
+		  }
+		else
+		  {
+		    cpp_errno (pfile, CPP_DL_WARNING,
+			"could not determine file timestamp");
+		    pbuffer->timestamp = U"\"??? ??? ?? ??:??:?? ????\"";
+		  }
+	      }
+	  }
+	result = pbuffer->timestamp;
+      }
+      break;
     case BT_FILE:
     case BT_BASE_FILE:
       {