MINOR: changed 'struct buffer' size allocation

To make buffer allocation more efficient, memory is assigned in 32-byte
blocks.  This is made possible using the new ALIGN_VALUE() macro.

Author: zaga00

include/common/define.h

@@ -62,6 +62,7 @@
 #define STR_ADDRSIZE(a)            (a), STR_SIZE(a)
 #define STR_BOOL(a)                ((a) ? "true" : "false")
 
+#define ALIGN_VALUE(v,b)           (((v) == 0) ? 0 : (((((v) - 1) >> (b)) + 1) << (b)))
 #define CLAMP_VALUE(v,a,b)         (((v) < (a)) ? (a) : (((v) > (b)) ? (b) : (v)))
 
 #define IN_RANGE(v,a,b)            (((v) >= (a)) && ((v) <= (b)))

src/.build-counter

@@ -1 +1 @@
-2411
+2412

src/util.c

@@ -199,6 +199,7 @@ void buffer_ptr_free(struct buffer **data)
 ssize_t buffer_grow(struct buffer *data, const void *src, size_t n)
 {
 	uint8_t *ptr;
+	size_t   size = ALIGN_VALUE(n, 5);
 	int      retval = FUNC_RET_ERROR;
 
 	DBG_FUNC(NULL, "%p, %p, %zu", data, src, n);
@@ -222,18 +223,18 @@ ssize_t buffer_grow(struct buffer *data, const void *src, size_t n)
 
 		retval = data->len;
 	}
-	else if (_NULL(ptr = realloc(data->ptr, data->size + n))) {
+	else if (_NULL(ptr = realloc(data->ptr, data->size + size))) {
 		w_log(NULL, _E("Failed to allocate data: %m"));
 	}
 	else {
 		W_DBG(NOTICE, NULL, "  reallocating buffer { %p, %zu, %zu } -> { %p, %zu, %zu }",
-		      data->ptr, data->len, data->size, ptr, data->len + (_NULL(src) ? 0 : n), data->size + n);
+		      data->ptr, data->len, data->size, ptr, data->len + (_NULL(src) ? 0 : n), data->size + size);
 
 		if (_NULL(src)) {
 			/* Clearing allocated buffer. */
-			(void)memset(ptr + data->size, 0, data->size - n);
+			(void)memset(ptr + data->size, 0, size);
 
-			data->size += n;
+			data->size += size;
 		} else {
 			/* Copying src data to buffer. */
 			(void)memcpy(ptr + data->len, src, n);