How to Use Snprintf
8 days ago
- #buffer management
- #C programming
- #sprintf
- The sprintf family of functions (sprintf, snprintf, vsnprintf, etc.) can determine the required buffer size when the upper bound is not fixed.
- Using snprintf with NULL and size 0 returns the needed buffer size without writing anything.
- Always add 1 to the returned size to account for the null terminator.
- The man pages specify that snprintf and vsnprintf write at most 'size' bytes, including the null terminator.
- A tiny header-only library is available to simplify buffer size computation.