From: Richard Stallman <rms@gnu.org>
Date: Thu, 26 Mar 1992 23:23:31 +0000 (+0000)
Subject: *** empty log message ***
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=526fef40af059bfd6e45ccdb66fbae12f49ed032;p=gcc.git

*** empty log message ***

From-SVN: r592
---

diff --git a/gcc/protoize.c b/gcc/protoize.c
index 29d947b79b8..c5b377e1228 100644
--- a/gcc/protoize.c
+++ b/gcc/protoize.c
@@ -1320,11 +1320,22 @@ shortpath (cwd, filename)
           path_p++;
           unmatched_slash_count++;
         }
+
+      /* Find out how many directory levels in cwd were *not* matched.  */
       while (*cwd_p)
         if (*cwd_p++ == '/')
-                unmatched_slash_count++;
+	  unmatched_slash_count++;
+
+      /* Now we know how long the "short name" will be.
+	 Reject it if longer than the input.  */
+      if (unmatched_slash_count * 3 + strlen (path_p) >= filename_len)
+	return filename;
+
+      /* For each of them, put a `../' at the beginning of the short name.  */
       while (unmatched_slash_count--)
         {
+	  /* Give up if the result gets to be longer
+	     than the absolute path name.  */
 	  if (rel_buffer + filename_len <= rel_buf_p + 3)
 	    return filename;
           *rel_buf_p++ = '.';
@@ -1332,6 +1343,7 @@ shortpath (cwd, filename)
           *rel_buf_p++ = '/';
         }
 
+      /* Then tack on the unmatched part of the desired file's name.  */
       do
 	{
 	  if (rel_buffer + filename_len <= rel_buf_p)