Remove use of sprintf. #328
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Some toolsets are now warning that sprintf is insecure/deprecated. This replaces all sprintf calls with equivalent b2 equivalents or new prtinf style utilities. This is for all platforms. Which avoids having to debug alternate implementations.
Seems clang-cl is broken with latest, 17.7.1, VS release.
VS 2013 doesn't have stdio functions in std namespace.
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Proposed changes
Some platforms are now warning on sprintf being unsafe by default. This removes all uses of sprintf for all platforms and replaces them with other built-in methods for conversions or with minimal use of snprintf.
Types of changes
What types of changes does your code introduce?
Further comments
Supersedes #240