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Well, this all depends on what kind of security the op's question is about. Is snprintf always null terminating the destination buffer? The function snprintf will silently truncate the string if it is too large, whereas the function sprintf_s will call the currently installed contraint handler function.

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Formally a properly used sprintf is as secure in this specific case as snprintf.

The functions snprintf() and vsnprintf() do not write more than size bytes (including the trailing '\0').

How can i do this? Snprintf(dst, sizeof (dst), blah %s, somestr); If you must use snprintf, you will need to create a separate pointer to keep track of the end of the string. The string emitted by the snprintf() call may be truncated relative to the one that would be.

Int snprintf (char * restrict s, size_t n, const char * restrict format,.); Snprintf () nicely prevents overrunning the destination s. The compiler is warning you about exactly what you think it is warning you about: What you are talking about in this.

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Yet when the destination is insufficient for the.

This pointer will be the first argument that you pass to snprintf. Directly from the cplusplus documentation snprintf composes a string with the same text that would be printed if format was used on printf, but instead of being printed, the content is stored. I have to format std::string with sprintf and send it into file stream.

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