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The Windows API has an _snprintf function that is not the same as
Unix's snprintf(): if the string is truncated then no trailing NUL
character is appended. This makes the function unsafe. Define a
replacement/wrapper called M_snprintf that works the same but always
appends a trailing NUL, for safety on Windows and other OSes that
behave like this.
Do the same thing for vsnprintf(), and update HACKING to list
snprintf/vsnprintf as forbidden functions. This fixes #375;
thanks to Quasar for pointing out the different behavior of these
functions.
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Add a section to the HACKING file listing unsafe C library functions
that should not be used.
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characters link and an introduction giving a brief explanation for the
choices.
Subversion-branch: /trunk/chocolate-doom
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Subversion-revision: 631
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