From f229ce08ca3956fd7ecbe2b9a83067eeb55d0afb Mon Sep 17 00:00:00 2001
From: schnetter <schnetter@17b73243-c579-4c4c-a9d2-2d5706c11dac>
Date: Mon, 26 Sep 2005 03:16:42 +0000
Subject: Print run time warnings while setting parameters with CCTK_WARN
 instead of with fprintf (stderr, ...).

Correct critical error in looking at the values of cctk_full_warnings,
highlight_warning_messages, and cctk_strong_param_check.

Handle the empty regular expression specially in CCTK_RegexMatch,
since regcomp may treat it as illegal expression.  In Cactus, an empty
regular expression matches everything.


git-svn-id: http://svn.cactuscode.org/flesh/trunk@4150 17b73243-c579-4c4c-a9d2-2d5706c11dac
---
 src/util/Misc.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

(limited to 'src/util')

diff --git a/src/util/Misc.c b/src/util/Misc.c
index 9d92a447..f4418799 100644
--- a/src/util/Misc.c
+++ b/src/util/Misc.c
@@ -1151,23 +1151,32 @@ int CCTK_RegexMatch(const char *string,
   int status;
   regex_t re;
 
-  if (regcomp(&re, pattern, REG_EXTENDED) == 0)
+  /* BSD says: an empty string is not a legal regular expression.
+     Handle this case specially.  */
+  if (strcmp(pattern, "") == 0)
   {
-    status = regexec(&re, string, (size_t)nmatch, pmatch, 0);
-    regfree(&re);
-    if (status != 0)
+    retval = 1;			/* report success */
+  }
+  else
+  {
+    if (regcomp(&re, pattern, REG_EXTENDED) == 0)
     {
-      retval = 0;      /* report error */
+      status = regexec(&re, string, (size_t)nmatch, pmatch, 0);
+      regfree(&re);
+      if (status != 0)
+      {
+        retval = 0;      /* report error */
+      }
+      else
+      {
+        retval = 1;
+      }
     }
     else
     {
-      retval = 1;
+      retval = 0;
     }
   }
-  else
-  {
-    retval = 0;
-  }
 
   return retval;
 }
-- 
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