regex: Fixed several warnings about signed/unsigned conversions.

deps/regex/regcomp.c

@@ -1140,7 +1140,7 @@ analyze (regex_t *preg)
 	dfa->subexp_map[i] = i;
       preorder (dfa->str_tree, optimize_subexps, dfa);
       for (i = 0; i < preg->re_nsub; i++)
-	if (dfa->subexp_map[i] != i)
+	if (dfa->subexp_map[i] != (int)i)
 	  break;
       if (i == preg->re_nsub)
 	{
@@ -1609,7 +1609,8 @@ calc_inveclosure (re_dfa_t *dfa)
 static reg_errcode_t
 calc_eclosure (re_dfa_t *dfa)
 {
-  int node_idx, incomplete;
+  size_t node_idx;
+  int incomplete;
 #ifdef DEBUG
   assert (dfa->nodes_len > 0);
 #endif

deps/regex/regex_internal.h

@@ -171,8 +171,9 @@ extern const size_t __re_error_msgid_idx[] attribute_hidden;
 typedef unsigned long int bitset_word_t;
 /* All bits set in a bitset_word_t.  */
 #define BITSET_WORD_MAX ULONG_MAX
-/* Number of bits in a bitset_word_t.  */
-#define BITSET_WORD_BITS (sizeof (bitset_word_t) * CHAR_BIT)
+/* Number of bits in a bitset_word_t. Cast to int as most code use it
+ * like that for counting */
+#define BITSET_WORD_BITS ((int)(sizeof (bitset_word_t) * CHAR_BIT))
 /* Number of bitset_word_t in a bit_set.  */
 #define BITSET_WORDS (SBC_MAX / BITSET_WORD_BITS)
 typedef bitset_word_t bitset_t[BITSET_WORDS];

deps/regex/regexec.c

@@ -689,7 +689,7 @@ re_search_internal (const regex_t *preg,
   if (nmatch > 1 || dfa->has_mb_node)
     {
       /* Avoid overflow.  */
-      if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= mctx.input.bufs_len, 0))
+      if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= (size_t)mctx.input.bufs_len, 0))
 	{
 	  err = REG_ESPACE;
 	  goto free_return;
@@ -920,7 +920,7 @@ re_search_internal (const regex_t *preg,
 
       if (dfa->subexp_map)
 	for (reg_idx = 0; reg_idx + 1 < nmatch; reg_idx++)
-	  if (dfa->subexp_map[reg_idx] != reg_idx)
+	  if (dfa->subexp_map[reg_idx] != (int)reg_idx)
 	    {
 	      pmatch[reg_idx + 1].rm_so
 		= pmatch[dfa->subexp_map[reg_idx] + 1].rm_so;
@@ -953,7 +953,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
   halt_node = mctx->last_node;
 
   /* Avoid overflow.  */
-  if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= match_last, 0))
+  if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= (size_t)match_last, 0))
     return REG_ESPACE;
 
   sifted_states = re_malloc (re_dfastate_t *, match_last + 1);
@@ -3375,7 +3375,7 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
   /* Avoid arithmetic overflow in size calculation.  */
   if (BE ((((SIZE_MAX - (sizeof (re_node_set) + sizeof (bitset_t)) * SBC_MAX)
 	    / (3 * sizeof (re_dfastate_t *)))
-	   < ndests),
+	   < (size_t)ndests),
 	  0))
     goto out_free;
 
@@ -4099,7 +4099,7 @@ extend_buffers (re_match_context_t *mctx)
   re_string_t *pstr = &mctx->input;
 
   /* Avoid overflow.  */
-  if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
+  if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= (size_t)pstr->bufs_len, 0))
     return REG_ESPACE;
 
   /* Double the lengthes of the buffers.  */