r22564: Move the _strict -> _zeronull functions into lib/util.c

and out of talloc at tridge's request.
Jeremy.
(This used to be commit da78488b86c464b6861d36398cca7524ad5906fe)

3 files changed, 99 insertions, 105 deletions

diff --git a/source3/lib/talloc/talloc.c b/source3/lib/talloc/talloc.c
index 8f7906d0d8..b2b00d8c65 100644
--- a/source3/lib/talloc/talloc.c
+++ b/source3/lib/talloc/talloc.c
@@ -1086,29 +1086,6 @@ void *_talloc_zero(const void *ctx, size_t size, const char *name)
 	return p;
 }
 
-
-/* 
-   talloc and zero memory. 
-   Strict version - returns NULL if size is zero.
-*/
-void *_talloc_zero_strict(const void *ctx, size_t size, const char *name)
-{
-	void *p;
-
-	if (unlikely(size == 0)) {
-		return NULL;
-	}
-
-	p = _talloc_named_const(ctx, size, name);
-
-	if (p) {
-		memset(p, '\0', size);
-	}
-
-	return p;
-}
-
-
 /*
   memdup with a talloc. 
 */
@@ -1124,26 +1101,6 @@ void *_talloc_memdup(const void *t, const void *p, size_t size, const char *name
 }
 
 /*
-  memdup with a talloc. 
-  Strict version - returns NULL if size is zero.
-*/
-void *_talloc_memdup_strict(const void *t, const void *p, size_t size, const char *name)
-{
-	void *newp;
-
-	if (unlikely(size == 0)) {
-		return NULL;
-	}
-
-	newp = _talloc_named_const(t, size, name);
-	if (likely(newp)) {
-		memcpy(newp, p, size);
-	}
-
-	return newp;
-}
-
-/*
   strdup with a talloc 
 */
 char *talloc_strdup(const void *t, const char *p)
@@ -1324,23 +1281,6 @@ void *_talloc_array(const void *ctx, size_t el_size, unsigned count, const char
 }
 
 /*
-  alloc an array, checking for integer overflow in the array size.
-  Strict version - returns NULL if count or el_size are zero.
-*/
-void *_talloc_array_strict(const void *ctx, size_t el_size, unsigned count, const char *name)
-{
-	if (count >= MAX_TALLOC_SIZE/el_size) {
-		return NULL;
-	}
-
-	if (el_size == 0 || count == 0) {
-		return NULL;
-	}
-
-	return _talloc_named_const(ctx, el_size * count, name);
-}
-
-/*
   alloc an zero array, checking for integer overflow in the array size
 */
 void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const char *name)
@@ -1352,24 +1292,6 @@ void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const
 }
 
 /*
-  alloc an zero array, checking for integer overflow in the array size
-  Strict version - returns NULL if count or el_size are zero.
-*/
-void *_talloc_zero_array_strict(const void *ctx, size_t el_size, unsigned count, const char *name)
-{
-	if (count >= MAX_TALLOC_SIZE/el_size) {
-		return NULL;
-	}
-
-	if (el_size == 0 || count == 0) {
-		return NULL;
-	}
-
-	return _talloc_zero(ctx, el_size * count, name);
-}
-
-
-/*
   realloc an array, checking for integer overflow in the array size
 */
 void *_talloc_realloc_array(const void *ctx, void *ptr, size_t el_size, unsigned count, const char *name)
@@ -1497,14 +1419,3 @@ int talloc_is_parent(const void *context, const void *ptr)
 	}
 	return 0;
 }
-
-/*
-  Talloc wrapper that returns NULL if size == 0.
-*/
-void *talloc_strict(const void *context, size_t size, const char *name)
-{
-	if (unlikely(size == 0)) {
-		return NULL;
-	}
-	return _talloc_named_const(context, size, name);
-}
diff --git a/source3/lib/talloc/talloc.h b/source3/lib/talloc/talloc.h
index 48bf4303c6..d9e7d94338 100644
--- a/source3/lib/talloc/talloc.h
+++ b/source3/lib/talloc/talloc.h
@@ -84,33 +84,22 @@ typedef void TALLOC_CTX;
 /* useful macros for creating type checked pointers */
 #define talloc(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
 #define talloc_size(ctx, size) talloc_named_const(ctx, size, __location__)
-#define talloc_size_strict(ctx, size) talloc_strict(ctx, size, __location__)
 #define talloc_ptrtype(ctx, ptr) (_TALLOC_TYPEOF(ptr))talloc_size(ctx, sizeof(*(ptr)))
 
 #define talloc_new(ctx) talloc_named_const(ctx, 0, "talloc_new: " __location__)
 
 #define talloc_zero(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
-/* Varient of talloc_zero that returns NULL if size is zero. */
-#define talloc_zero_strict(ctx, type) (type *)_talloc_zero_strict(ctx, sizeof(type), #type)
 #define talloc_zero_size(ctx, size) _talloc_zero(ctx, size, __location__)
-#define talloc_zero_size_strict(ctx, size) _talloc_zero_strict(ctx, size, __location__)
 
 #define talloc_zero_array(ctx, type, count) (type *)_talloc_zero_array(ctx, sizeof(type), count, #type)
-/* Varient of talloc_zero_array that returns NULL if count is zero. */
-#define talloc_zero_array_strict(ctx, type, count) (type *)_talloc_zero_array_strict(ctx, sizeof(type), count, #type)
 #define talloc_array(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
-/* Varient of talloc_array that returns NULL if count is zero. */
-#define talloc_array_strict(ctx, type, count) (type *)_talloc_array_strict(ctx, sizeof(type), count, #type)
 #define talloc_array_size(ctx, size, count) _talloc_array(ctx, size, count, __location__)
-#define talloc_array_size_strict(ctx, size, count) _talloc_array_strict(ctx, size, count, __location__)
 #define talloc_array_ptrtype(ctx, ptr, count) (_TALLOC_TYPEOF(ptr))talloc_array_size(ctx, sizeof(*(ptr)), count)
 
 #define talloc_realloc(ctx, p, type, count) (type *)_talloc_realloc_array(ctx, p, sizeof(type), count, #type)
 #define talloc_realloc_size(ctx, ptr, size) _talloc_realloc(ctx, ptr, size, __location__)
 
 #define talloc_memdup(t, p, size) _talloc_memdup(t, p, size, __location__)
-/* Varient of talloc_memdup that returns NULL if count is zero. */
-#define talloc_memdup_strict(t, p, size) _talloc_memdup_strict(t, p, size, __location__)
 
 #define talloc_set_type(ptr, type) talloc_set_name_const(ptr, #type)
 #define talloc_get_type(ptr, type) (type *)talloc_check_name(ptr, #type)
@@ -163,9 +152,7 @@ void talloc_disable_null_tracking(void);
 void talloc_enable_leak_report(void);
 void talloc_enable_leak_report_full(void);
 void *_talloc_zero(const void *ctx, size_t size, const char *name);
-void *_talloc_zero_strict(const void *ctx, size_t size, const char *name);
 void *_talloc_memdup(const void *t, const void *p, size_t size, const char *name);
-void *_talloc_memdup_strict(const void *t, const void *p, size_t size, const char *name);
 char *talloc_strdup(const void *t, const char *p);
 char *talloc_strndup(const void *t, const char *p, size_t n);
 char *talloc_append_string(const void *t, char *orig, const char *append);
@@ -174,9 +161,7 @@ char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap) PRINTF_ATTRI
 char *talloc_asprintf(const void *t, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
 char *talloc_asprintf_append(char *s, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
 void *_talloc_array(const void *ctx, size_t el_size, unsigned count, const char *name);
-void *_talloc_array_strict(const void *ctx, size_t el_size, unsigned count, const char *name);
 void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const char *name);
-void *_talloc_zero_array_strict(const void *ctx, size_t el_size, unsigned count, const char *name);
 void *_talloc_realloc_array(const void *ctx, void *ptr, size_t el_size, unsigned count, const char *name);
 void *talloc_realloc_fn(const void *context, void *ptr, size_t size);
 void *talloc_autofree_context(void);
@@ -184,6 +169,5 @@ size_t talloc_get_size(const void *ctx);
 void *talloc_find_parent_byname(const void *ctx, const char *name);
 void talloc_show_parents(const void *context, FILE *file);
 int talloc_is_parent(const void *context, const void *ptr);
-void *talloc_strict(const void *context, size_t size, const char *name);
 
 #endif
diff --git a/source3/lib/util.c b/source3/lib/util.c
index 1e64db38fc..9a22e89fe2 100644
--- a/source3/lib/util.c
+++ b/source3/lib/util.c
@@ -3227,3 +3227,102 @@ int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, i
 	}
 	return IVAL(ptr,off);
 }
+
+/****************************************************************
+ talloc wrapper functions that guarentee a null pointer return
+ if size == 0.
+****************************************************************/
+
+#ifndef MAX_TALLOC_SIZE
+#define MAX_TALLOC_SIZE 0x10000000
+#endif
+
+/*
+ *    talloc and zero memory.
+ *    - returns NULL if size is zero.
+ */
+
+void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
+{
+	void *p;
+
+	if (size == 0) {
+		return NULL;
+	}
+
+	p = talloc_named_const(ctx, size, name);
+
+	if (p) {
+		memset(p, '\0', size);
+	}
+
+	return p;
+}
+
+/*
+ *   memdup with a talloc.
+ *   - returns NULL if size is zero.
+ */
+
+void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
+{
+	void *newp;
+
+	if (size == 0) {
+		return NULL;
+	}
+
+	newp = talloc_named_const(t, size, name);
+	if (newp) {
+		memcpy(newp, p, size);
+	}
+
+	return newp;
+}
+
+/*
+ *   alloc an array, checking for integer overflow in the array size.
+ *   - returns NULL if count or el_size are zero.
+ */
+
+void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
+{
+	if (count >= MAX_TALLOC_SIZE/el_size) {
+		return NULL;
+	}
+
+	if (el_size == 0 || count == 0) {
+		return NULL;
+	}
+
+	return talloc_named_const(ctx, el_size * count, name);
+}
+
+/*
+ *   alloc an zero array, checking for integer overflow in the array size
+ *   - returns NULL if count or el_size are zero.
+ */
+
+void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
+{
+	if (count >= MAX_TALLOC_SIZE/el_size) {
+		return NULL;
+	}
+
+	if (el_size == 0 || count == 0) {
+		return NULL;
+	}
+
+	return _talloc_zero(ctx, el_size * count, name);
+}
+
+/*
+ *   Talloc wrapper that returns NULL if size == 0.
+ */
+void *talloc_zeronull(const void *context, size_t size, const char *name)
+{
+	if (size == 0) {
+		return NULL;
+	}
+	return talloc_named_const(context, size, name);
+}