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| author | Mark Adler <madler@alumni.caltech.edu> | 2012-06-03 12:45:55 -0700 |
|---|---|---|
| committer | Mark Adler <madler@alumni.caltech.edu> | 2012-06-03 12:45:55 -0700 |
| commit | 25e4a3da552ab570d2a049cc2d75b6e23ba9362a (patch) | |
| tree | ef330c044497135490b15c493ef579df710e6226 /gzguts.h | |
| parent | ee026accdeefe2f25dbb09fa2bae6c1c63f98d15 (diff) | |
| download | zlib-25e4a3da552ab570d2a049cc2d75b6e23ba9362a.tar.gz | |
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.
Diffstat (limited to 'gzguts.h')
| -rw-r--r-- | gzguts.h | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -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 |