fix memory pioCopyWithFilters with new fobj_alloc_temp

Author: funny-falcon

src/fu_util/fo_obj.h

@@ -479,6 +479,17 @@ extern fobjBool*        fobj_bool(bool f);
 #define kls__fobjBool   mth(fobjRepr, fobjFormat)
 fobj_klass(fobjBool);
 
+/*
+ * Allocate temporary blob.
+ * It could be anything, and it will be automatically released.
+ */
+static inline void* fobj_alloc_temp(size_t buf_size);
+/* get object pointer for temporary blob */
+static inline fobj_t fobj_temp2obj(void* temp);
+#define fobj_temp_save(ptr)		$save(fobj_temp2obj(ptr))
+#define fobj_temp_result(ptr)   $result(fobj_temp2obj(ptr))
+#define fobj_temp_return(ptr)   $return(fobj_temp2obj(ptr))
+
 /**********************************
  * kv
  */

src/fu_util/impl/fo_impl.c

@@ -1341,6 +1341,7 @@ fobj_klass_handle(fobjInt);
 fobj_klass_handle(fobjUInt);
 fobj_klass_handle(fobjFloat);
 fobj_klass_handle(fobjBool);
+fobj_klass_handle(fobjTempBuffer);
 
 void
 fobj_init(void) {

src/fu_util/impl/fo_impl2.h

@@ -234,4 +234,31 @@ fobj_errsrc(err_i err) {
 #define fobj__transform_fokv(...) \
     fm_eval_tuples_comma(fobj__transform_fokv_do, __VA_ARGS__)
 
+/**********************************
+ * Temp Buffer - "anything" you want to be automatically cleared
+ */
+typedef struct fobjTempBuffer {
+	char buf[1];
+} fobjTempBuffer;
+#define kls__fobjTempBuffer varsized(buf)
+fobj_klass(fobjTempBuffer);
+
+
+static inline void*
+fobj_alloc_temp(size_t buf_size)
+{
+	return fobj_alloc_sized(fobjTempBuffer, buf_size)->buf;
+}
+
+static inline fobj_t
+fobj_temp2obj(void* temp)
+{
+	/*
+	 * It looks dumb for the moment.
+	 * But in future object header will not be hidden, therefore
+	 * it will be meaningful.
+	 */
+	return (fobj_t)((char*)temp - offsetof(fobjTempBuffer, buf));
+}
+
 #endif // FOBJ_OBJ_PRIV2_H

src/utils/file.c

@@ -5634,7 +5634,7 @@ pioCopyWithFilters(pioWriteFlush_i dest, pioRead_i src,
     for (i = nfilters - 1; i >= 0; i--)
         dest = pioWrapWriteFilter(dest, filters[i], OUT_BUF_SIZE);
 
-    buf = ft_malloc(OUT_BUF_SIZE);
+    buf = fobj_alloc_temp(OUT_BUF_SIZE);
 
     for (;;)
     {