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non-VC compile fix: map scanf_s to scanf etc.

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This was SVN commit r7240.
This commit is contained in:
janwas 2010-01-01 23:38:07 +00:00
parent 03726c0b54
commit 936be062ac
1 changed files with 16 additions and 7 deletions
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23
source/lib/secure_crt.h
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@ -95,13 +95,22 @@ typedef int errno_t;
extern errno_t fopen_s(FILE** pfile, const char* filename, const char* mode);
extern errno_t _wfopen_s(FILE** pfile, const wchar_t* filename, const wchar_t* mode);
// *scanf_s functions have a different API to *scanf - in particular, any
// %s or %c or %[ parameter must be followed by a size parameter.
// Therefore we can't just fall back on the *scanf functions.
// Emulating the behaviour would require a lot of effort, so don't bother and
// just require callers to deal with the problem.
//#define fscanf_s fscanf
//#define sscanf_s sscanf
// we'd like to avoid deprecation warnings caused by scanf. selective
// 'undeprecation' isn't possible, replacing all stdio declarations with
// our own deprecation scheme is a lot of work, suppressing all deprecation
// warnings would cause important other warnings to be missed, and avoiding
// scanf outright isn't convenient.
// the remaining alternative is using scanf_s where available and otherwise
// defining it to scanf. note that scanf_s has a different API:
// any %s or %c or %[ format specifier's buffer must be followed by a
// size parameter. callers must either avoid these, or provide two codepaths
// (use scanf #if EMULATE_SECURE_CRT, otherwise scanf_s).
#define scanf_s scanf
#define wscanf_s wscanf
#define fscanf_s fscanf
#define fwscanf_s fwscanf
#define sscanf_s sscanf
#define swscanf_s swscanf
#endif // #if EMULATE_SECURE_CRT
#endif // #ifndef INCLUDED_SECURE_CRT