1 files changed, 55 insertions, 0 deletions
diff --git a/gdb/utils.c b/gdb/utils.c
index a2c2710..acb4c7d 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -67,6 +67,7 @@
 
 #include "gdb_usleep.h"
 #include "interps.h"
+#include "gdb_regex.h"
 
 #if !HAVE_DECL_MALLOC
 extern PTR malloc ();		/* ARI: PTR */
@@ -1113,6 +1114,60 @@ make_hex_string (const gdb_byte *data, size_t length)
 
 
 
+/* A cleanup function that calls regfree.  */
+
+static void
+do_regfree_cleanup (void *r)
+{
+  regfree (r);
+}
+
+/* Create a new cleanup that frees the compiled regular expression R.  */
+
+struct cleanup *
+make_regfree_cleanup (regex_t *r)
+{
+  return make_cleanup (do_regfree_cleanup, r);
+}
+
+/* Return an xmalloc'd error message resulting from a regular
+   expression compilation failure.  */
+
+char *
+get_regcomp_error (int code, regex_t *rx)
+{
+  size_t length = regerror (code, rx, NULL, 0);
+  char *result = xmalloc (length);
+
+  regerror (code, rx, result, length);
+  return result;
+}
+
+/* Compile a regexp and throw an exception on error.  This returns a
+   cleanup to free the resulting pattern on success.  RX must not be
+   NULL.  */
+
+struct cleanup *
+compile_rx_or_error (regex_t *pattern, const char *rx, const char *message)
+{
+  int code;
+
+  gdb_assert (rx != NULL);
+
+  code = regcomp (pattern, rx, REG_NOSUB);
+  if (code != 0)
+    {
+      char *err = get_regcomp_error (code, pattern);
+
+      make_cleanup (xfree, err);
+      error (("%s: %s"), message, err);
+    }
+
+  return make_regfree_cleanup (pattern);
+}
+
+
+
 /* This function supports the query, nquery, and yquery functions.
    Ask user a y-or-n question and return 0 if answer is no, 1 if
    answer is yes, or default the answer to the specified default