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Use _snprintf for snprinf in Microsoft C. 

More than a decade later, Microsoft C does not support the C99
standard.  It's good that _snprintf has a different name, since it
does not guarantee that the result is null terminated, as does
snprintf.  However where _snprintf is used under Microsoft C, the
destination string is assured to be long enough, so this will not
be a problem.  This occurs in two places, both in gzlib.c.  Where
sprintf functionality is needed by gzprintf, vsnprintf is used in
the case of Microsoft C.
This commit is contained in:
Mark Adler 2012-06-03 12:45:55 -07:00
parent ee026accde
commit 25e4a3da55
1 changed files with 8 additions and 0 deletions
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8
gzguts.h
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@ -88,6 +88,14 @@
# endif
#endif
/* unlike snprintf (which is required in C99, yet still not supported by
Microsoft more than a decade later!), _snprintf does not guarantee null
termination of the result -- however this is only used in gzlib.c where
the result is assured to fit in the space provided */
#ifdef _MSC_VER
# define snprintf _snprintf
#endif
#ifndef local
# define local static
#endif