1 files changed, 33 insertions, 0 deletions
diff --git a/src/path.c b/src/path.c
index 17a9d0fe7e..acdd216c06 100644
--- a/src/path.c
+++ b/src/path.c
@@ -4,6 +4,7 @@
 #include "path.h"
 #include "charset.h"
 #include "eval.h"
+#include "ex_docmd.h"
 #include "ex_getln.h"
 #include "fileio.h"
 #include "file_search.h"
@@ -2012,3 +2013,35 @@ expand_wildcards (
   return retval;
 }
 
+/*
+ * Return TRUE if "fname" matches with an entry in 'suffixes'.
+ */
+int match_suffix(char_u *fname)
+{
+  int fnamelen, setsuflen;
+  char_u      *setsuf;
+#define MAXSUFLEN 30        /* maximum length of a file suffix */
+  char_u suf_buf[MAXSUFLEN];
+
+  fnamelen = (int)STRLEN(fname);
+  setsuflen = 0;
+  for (setsuf = p_su; *setsuf; ) {
+    setsuflen = copy_option_part(&setsuf, suf_buf, MAXSUFLEN, ".,");
+    if (setsuflen == 0) {
+      char_u *tail = gettail(fname);
+
+      /* empty entry: match name without a '.' */
+      if (vim_strchr(tail, '.') == NULL) {
+        setsuflen = 1;
+        break;
+      }
+    } else {
+      if (fnamelen >= setsuflen
+          && fnamencmp(suf_buf, fname + fnamelen - setsuflen,
+              (size_t)setsuflen) == 0)
+        break;
+      setsuflen = 0;
+    }
+  }
+  return setsuflen != 0;
+}