Don't setup output buffers we are not going to use

[fio.git] / lib / output_buffer.c

diff --git a/lib/output_buffer.c b/lib/output_buffer.c
index 145272a00d60e4ed067ac404c1a1966a4bb98668..da7087470ec41f131f0f03d8112086c223ab6bf8 100644 (file)
--- a/lib/output_buffer.c
+++ b/lib/output_buffer.c
@@ -7,12 +7,11 @@
 
 #define BUF_INC        1024
 
-void buf_output_init(struct buf_output *out, int index)
+void buf_output_init(struct buf_output *out)
 {
-       out->max_buflen = BUF_INC;
-       out->buf = malloc(out->max_buflen);
-       memset(out->buf, 0, out->max_buflen);
+       out->max_buflen = 0;
        out->buflen = 0;
+       out->buf = NULL;
 }
 
 void buf_output_free(struct buf_output *out)
@@ -23,11 +22,11 @@ void buf_output_free(struct buf_output *out)
 size_t buf_output_add(struct buf_output *out, const char *buf, size_t len)
 {
        while (out->max_buflen - out->buflen < len) {
-               size_t newlen = out->max_buflen + BUF_INC - out->buflen;
+               size_t old_max = out->max_buflen;
 
                out->max_buflen += BUF_INC;
                out->buf = realloc(out->buf, out->max_buflen);
-               memset(&out->buf[out->buflen], 0, newlen);
+               memset(&out->buf[old_max], 0, BUF_INC);
        }
 
        memcpy(&out->buf[out->buflen], buf, len);