It is also unclear to me (and presumably to the standards committee too) what benefit there is to having both 'sizeOfBuffer' and 'count' it looks like the same information twice (or, at least, code will commonly be written with the same value for both parameters). Note that this is not simply a matter of type mapping: the number of fixed arguments is different, and therefore irreconcilable. count - Maximum number of characters to write (not including the terminating null), or _TRUNCATE.sizeOfBuffer - The size of the buffer for output.Unfortunately, MSDN says the interface to vsnprintf_s() is: int vsnprintf_s( Int vsnprintf_s(char * restrict s, rsize_t n,Ĭonst char * restrict format, va_list arg) Sadly, however, the interface defined by the standard is incompatible with the interface defined by Microsoft, thus rendering the standard largely irrelevant.įor example, TR 24731-1 says the interface to vsnprintf_s() is: #define _ _STDC_WANT_LIB_EXT1_ _ 1 It standardizes the interfaces to the various functions such as vsnprintf_s(). The Standard C committee has created a technical report, TR 24731-1, in part at Microsoft's encouragement (I believe). (4) strlcpy and (5) strlcat are BSD library functions, available on Mac.
Deduplicator mac mac#
(2) vsnprintf and (3) snprintf are from the C99 version of the C Standard Library (available in GCC on Mac but not in MSVC on Windows). You can even use GCC's format function attribute to enable format string checking on your own functions. There are a variety of other options to control GCC's treatment of format strings. This option produces compiler warnings of disagreement between argument types and static format strings. (1) GCC_WARN_TYPECHECK_CALLS_TO_PRINTF is an XCode configuration option which corresponds to the GCC command-line option -Wformat. Sprintf sprintf_s GCC, C99 GCC_WARN_TYPECHECK_CALLS_TO_PRINTF, snprintf(3) Vsprintf vsprintf_s GCC, C99 GCC_WARN_TYPECHECK_CALLS_TO_PRINTF, vsnprintf(2) Vfprintf vfprintf_s GCC GCC_WARN_TYPECHECK_CALLS_TO_PRINTF(1)
Here are some of them compared with Microsoft's "safe" APIs:įopen fopen_s C none, assume fopen is safe SUMMARY: on Mac, there are several APIs and compiler options that provide safer alternatives to C Standard Library functions.
Deduplicator mac portable#
Of course a portable implementation that works on Mac and Windows (and other operating systems) would be even better. I'm trying to identify a best-practice Mac API that is as similar as possible to the traditional C library calls while adding safety.
Deduplicator mac how to#
I'm NOT asking for tips on how to use STL classes to do this. I am NOT asking how to write these myself. I am NOT asking for your opinions about Microsoft's implementation (unless it's available on the Mac.) Although some of these functions might be easy to write myself, not all are. Please note: This question is about the Mac. In particular, I'm looking for "safe" implementations of at least the following functions:įopen vfprintf vsprintf sprintf strncpy strcpy strcat As far as I know, this implementation is not available on the Mac.ĭoes Apple (or a third party) provide anything similar for use with GCC on OSX? They also provide other features such as invalid format string detection, different file security, etc.
These functions are not drop-in replacements since they have the different signatures necessary to provide additional safety information (e.g., buffer length). On Windows, the Microsoft C/C++ compilers provide the "_s" functions (e.g., vfprintf_s) as a safer alternative to the standard library calls. Many traditional Standard C Library functions (e.g., vfprintf) are considered to be unsafe due to the potential for buffer overflow or other security problems. With some experimentation on the range between ‘strict’ and ‘fuzzy’, the operator should provide a satisfactory level of deduplication.What's the best one-stop-shop "safe" C library solution on the Mac? I use quotes on "safe"/"unsafe" because there is much debate as to the benefits of certain Standard Library functions or their putatively improved alternatives. ‘Bob’ will be treated as a duplicate of ‘Bobby’.‘Jenni’ will be treated as a duplicate of ‘Jenny’ moving the slider all the way towards ‘fuzzy’ will greatly reduce the strictness of the matching algorithm.‘DAVE’ will be treated as a duplicate of ‘Dave’ moving the slider another notch towards ‘fuzzy’ will result in a spelling-insensitive comparison.Moving the fuzziness slider one notch towards ‘fuzzy’ will result in a case-insensitive comparison. To account for variation in capitalisation and spelling, you may wish to use fuzzy matching. Your list has now been deduplicated and contains only unique elements. Deduplicator will identify duplicate items and show them in a preview window. Simply paste your list into Deduplicator and hit ‘Find Duplicates’. Deduplicator removes duplicates from a list with optional fuzzy-matching.
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