X-Git-Url: http://sjero.net/git/?a=blobdiff_plain;f=src%2Fsysdep.h;h=5ecef669e540b24ad94dd73a33b994ce470e3290;hb=3c6093cf1358c194aa77f6d099687c5d766732d4;hp=32ff0364b7308cddead6b1847bcd00b205cf1cce;hpb=c51015565a219a5e271546a295058883b8b28079;p=wget

diff --git a/src/sysdep.h b/src/sysdep.h
index 32ff0364..5ecef669 100644
--- a/src/sysdep.h
+++ b/src/sysdep.h
@@ -5,8 +5,8 @@ This file is part of Wget.
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -111,18 +111,30 @@ do {						\
   DEBUGP (("Closing fd %d\n", x));		\
 } while (0)
 
-/* Define a "very long" type useful for storing large non-negative
-   integers, e.g. the total number of bytes downloaded.  This needs to
-   be an integral type at least 64 bits wide.  On the machines where
-   `long' is 64-bit, we use long.  Otherwise, we check whether `long
-   long' is available and if yes, use that.  Otherwise, we give up and
-   just use `long'.  */
+/* Define a large ("very long") type useful for storing large
+   non-negative quantities that exceed sizes of normal download, such
+   as the *total* number of bytes downloaded.  To fit today's needs,
+   this needs to be an integral type at least 64 bits wide.  On the
+   machines where `long' is 64-bit, we use long.  Otherwise, we check
+   whether `long long' is available and if yes, use that.  If long
+   long is unavailable, we give up and just use `long'.
+
+   This check could be smarter and moved to configure, which could
+   check for a bunch of non-standard types such as uint64_t.  But I
+   don't see the need for it -- the current test will work on all
+   modern architectures, and if it fails, nothing bad happens, we just
+   end up with long.
+
+   Note: you cannot use VERY_LONG_TYPE along with printf().  When you
+   need to print it, use very_long_to_string().  */
+
 #if (SIZEOF_LONG >= 8) || !defined(HAVE_LONG_LONG)
+/* either long is "big enough", or long long is unavailable which
+   leaves long as the only choice. */ 
 # define VERY_LONG_TYPE   unsigned long
-# define VERY_LONG_FORMAT "%lu"
-#else  /* long is smaller than 8 bytes, but long long is available. */
+#else  /* use long long */
+/* long is smaller than 8 bytes, but long long is available. */
 # define VERY_LONG_TYPE   unsigned long long
-# define VERY_LONG_FORMAT "%llu"
 #endif /* use long long */
 
 /* Defined in cmpt.c: */