replace "if (p) free(p)" by just "free(p)" - free(NULL) is safe.

4 files changed, 18 insertions, 31 deletions

diff --git a/libc/misc/glob/glob.c b/libc/misc/glob/glob.c
index 00c49688f..8d3e3c450 100644
--- a/libc/misc/glob/glob.c
+++ b/libc/misc/glob/glob.c
@@ -482,8 +482,7 @@ static int glob_in_dir (const char *pattern, const char *directory, int flags,
   }
   while (names != NULL)
     {
-      if (names->name != NULL)
-	free (names->name);
+      free (names->name);
       names = names->next;
     }
   return GLOB_NOSPACE;
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c
index 57b97ae68..7a9c4d7e0 100644
--- a/libc/misc/regex/regex_old.c
+++ b/libc/misc/regex/regex_old.c
@@ -5132,7 +5132,7 @@ strong_alias(__re_search_2, re_search_2)
 #ifdef MATCH_MAY_ALLOCATE
 # define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL
 #else
-# define FREE_VAR(var) if (var) free (var); var = NULL
+# define FREE_VAR(var) free (var); var = NULL
 #endif
 
 #ifdef WCHAR
@@ -8313,20 +8313,17 @@ void
 regfree (preg)
     regex_t *preg;
 {
-  if (preg->buffer != NULL)
-    free (preg->buffer);
+  free (preg->buffer);
   preg->buffer = NULL;
 
   preg->allocated = 0;
   preg->used = 0;
 
-  if (preg->fastmap != NULL)
-    free (preg->fastmap);
+  free (preg->fastmap);
   preg->fastmap = NULL;
   preg->fastmap_accurate = 0;
 
-  if (preg->translate != NULL)
-    free (preg->translate);
+  free (preg->translate);
   preg->translate = NULL;
 }
 #if defined _LIBC || defined __UCLIBC__
diff --git a/libc/misc/search/_hsearch_r.c b/libc/misc/search/_hsearch_r.c
index 257c0610c..c9c4a9ccf 100644
--- a/libc/misc/search/_hsearch_r.c
+++ b/libc/misc/search/_hsearch_r.c
@@ -110,9 +110,8 @@ void hdestroy_r (struct hsearch_data *htab)
       return;
     }
 
-  if (htab->table != NULL)
-    /* free used memory */
-    free (htab->table);
+  /* free used memory */
+  free (htab->table);
 
   /* the sign for an existing table is an value != NULL in htable */
   htab->table = NULL;
diff --git a/libc/misc/wordexp/wordexp.c b/libc/misc/wordexp/wordexp.c
index 6872a65ba..45d5a876e 100644
--- a/libc/misc/wordexp/wordexp.c
+++ b/libc/misc/wordexp/wordexp.c
@@ -1076,8 +1076,7 @@ parse_comm(char **word, size_t * word_length, size_t * max_length,
 	}
 
 	/* Premature end */
-	if (comm)
-		free(comm);
+	free(comm);
 
 	return WRDE_SYNTAX;
 }
@@ -1370,8 +1369,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 							   &buffer[20]);
 			*word = w_addstr(*word, word_length, max_length, value);
 			free(env);
-			if (pattern)
-				free(pattern);
+			free(pattern);
 			return *word ? 0 : WRDE_NOSPACE;
 		}
 		/* Is it `$*' or `$@' (unquoted) ? */
@@ -1530,8 +1528,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 						if (free_value)
 							free(value);
 
-						if (expanded)
-							free(expanded);
+						free(expanded);
 
 						goto do_error;
 					}
@@ -1550,8 +1547,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 						if (free_value)
 							free(value);
 
-						if (expanded)
-							free(expanded);
+						free(expanded);
 
 						goto do_error;
 					}
@@ -1573,8 +1569,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 					goto no_space;
 			}
 
-			if (pattern)
-				free(pattern);
+			free(pattern);
 
 			pattern = expanded;
 		}
@@ -1723,7 +1718,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 				/* Substitute parameter */
 				break;
 
-			if (free_value && value)
+			if (free_value)
 				free(value);
 
 			if (!colon_seen && value)
@@ -1740,7 +1735,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 
 		case ACT_NONNULL_SUBST:
 			if (value && (*value || !colon_seen)) {
-				if (free_value && value)
+				if (free_value)
 					free(value);
 
 				value = pattern ? strdup(pattern) : pattern;
@@ -1769,7 +1764,7 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 				goto success;
 			}
 
-			if (free_value && value)
+			if (free_value)
 				free(value);
 
 			value = pattern ? strdup(pattern) : pattern;
@@ -1895,11 +1890,9 @@ parse_param(char **word, size_t * word_length, size_t * max_length,
 	error = WRDE_SYNTAX;
 
   do_error:
-	if (env)
-		free(env);
+	free(env);
 
-	if (pattern)
-		free(pattern);
+	free(pattern);
 
 	return error;
 }
@@ -2269,8 +2262,7 @@ int wordexp(const char *words, wordexp_t * we, int flags)
 	 *  set we members back to what they were.
 	 */
 
-	if (word != NULL)
-		free(word);
+	free(word);
 
 	if (error == WRDE_NOSPACE)
 		return WRDE_NOSPACE;