diff options
Diffstat (limited to 'libcpp/macro.c')
| -rw-r--r-- | libcpp/macro.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libcpp/macro.c b/libcpp/macro.c index 3204e55..67e936e 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: { |