Pull in some regex fixes.

5 files changed, 26 insertions, 12 deletions

diff --git a/ChangeLog b/ChangeLog
index e52e3ebb..3fc90f0f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2013-02-04         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* regcomp.c, regex.c, regex_internal.c, regexec.c: Update
+	copyright years to sync with GLIBC.
+
+	From: http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html,
+	by Andreas Schwab <schwab@suse.de>:
+
+	* regexec.c (extend_buffers): Add parameter min_len.
+	(check_matching): Pass minimum needed length.
+	(clean_state_log_if_needed): Likewise.
+	(get_subexp): Likewise.`
+
 2013-02-03         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* configure.ac: Add Automake test for cross compiling.
diff --git a/regcomp.c b/regcomp.c
index f6a7fdf6..70a0d38a 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2007,2009,2010,2011,2012 Free Software Foundation, Inc.
+   Copyright (C) 2002-2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
diff --git a/regex.c b/regex.c
index ec2ba1f6..700e7f9d 100644
--- a/regex.c
+++ b/regex.c
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2012 Free Software Foundation, Inc.
+   Copyright (C) 2002-2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
diff --git a/regex_internal.c b/regex_internal.c
index 80991613..5f77bcb0 100644
--- a/regex_internal.c
+++ b/regex_internal.c
@@ -1,5 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2006, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
diff --git a/regexec.c b/regexec.c
index 187c1b9f..a39e1f58 100644
--- a/regexec.c
+++ b/regexec.c
@@ -1,6 +1,5 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002-2005,2007,2009,2010,2011,2013
-   Free Software Foundation, Inc.
+   Copyright (C) 2002-2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
@@ -198,7 +197,7 @@ static int group_nodes_into_DFAstates (const re_dfa_t *dfa,
 static int check_node_accept (const re_match_context_t *mctx,
 			      const re_token_t *node, int idx)
      internal_function;
-static reg_errcode_t extend_buffers (re_match_context_t *mctx)
+static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len)
      internal_function;
 
 #ifdef GAWK
@@ -1168,7 +1167,7 @@ check_matching (re_match_context_t *mctx, int fl_longest_match,
 	  || (BE (next_char_idx >= mctx->input.valid_len, 0)
 	      && mctx->input.valid_len < mctx->input.len))
 	{
-	  err = extend_buffers (mctx);
+	  err = extend_buffers (mctx, next_char_idx + 1);
 	  if (BE (err != REG_NOERROR, 0))
 	    {
 	      assert (err == REG_ESPACE);
@@ -1748,7 +1747,7 @@ clean_state_log_if_needed (re_match_context_t *mctx, int next_state_log_idx)
 	  && mctx->input.valid_len < mctx->input.len))
     {
       reg_errcode_t err;
-      err = extend_buffers (mctx);
+      err = extend_buffers (mctx, next_state_log_idx + 1);
       if (BE (err != REG_NOERROR, 0))
 	return err;
     }
@@ -2802,7 +2801,7 @@ get_subexp (re_match_context_t *mctx, int bkref_node, int bkref_str_idx)
 		  if (bkref_str_off >= mctx->input.len)
 		    break;
 
-		  err = extend_buffers (mctx);
+		  err = extend_buffers (mctx, bkref_str_off + 1);
 		  if (BE (err != REG_NOERROR, 0))
 		    return err;
 
@@ -4112,7 +4111,7 @@ check_node_accept (const re_match_context_t *mctx, const re_token_t *node,
 
 static reg_errcode_t
 internal_function __attribute_warn_unused_result__
-extend_buffers (re_match_context_t *mctx)
+extend_buffers (re_match_context_t *mctx, int min_len)
 {
   reg_errcode_t ret;
   re_string_t *pstr = &mctx->input;
@@ -4121,8 +4120,10 @@ extend_buffers (re_match_context_t *mctx)
   if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
     return REG_ESPACE;
 
-  /* Double the lengthes of the buffers.  */
-  ret = re_string_realloc_buffers (pstr, MIN (pstr->len, pstr->bufs_len * 2));
+  /* Double the lengthes of the buffers, but allocate at least MIN_LEN.  */
+  ret = re_string_realloc_buffers (pstr,
+				   MAX (min_len,
+					MIN (pstr->len, pstr->bufs_len * 2)));
   if (BE (ret != REG_NOERROR, 0))
     return ret;