fix compiler warning

1 files changed, 6 insertions, 1 deletions

diff --git a/ares/ares__read_line.c b/ares/ares__read_line.c
index 29f8e5dc0..2e94945dc 100644
--- a/ares/ares__read_line.c
+++ b/ares/ares__read_line.c
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "ares.h"
+#include "ares_nowarn.h"
 #include "ares_private.h"
 
 /* This is an internal function.  Its contract is to read a line from
@@ -46,7 +47,9 @@ int ares__read_line(FILE *fp, char **buf, size_t *bufsize)
 
   for (;;)
     {
-      if (!fgets(*buf + offset, (int)(*bufsize - offset), fp))
+      int bytestoread = aresx_uztosi(*bufsize - offset);
+
+      if (!fgets(*buf + offset, bytestoread, fp))
         return (offset != 0) ? 0 : (ferror(fp)) ? ARES_EFILE : ARES_EOF;
       len = offset + strlen(*buf + offset);
       if ((*buf)[len - 1] == '\n')
@@ -55,6 +58,8 @@ int ares__read_line(FILE *fp, char **buf, size_t *bufsize)
           break;
         }
       offset = len;
+      if(len < *bufsize - 1)
+        continue;
 
       /* Allocate more space. */
       newbuf = realloc(*buf, *bufsize * 2);