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Thomas Haller authored
Showcase for the new macros NM_UTILS_STRING_LOOKUP_TABLE() and NM_UTILS_STRING_LOOKUP_TABLE_DEFINE_STATIC(). It changes behavior in case of looking up an invalid/unknown state reason. Previously it would just have returned "unknown" -- which was indistinguishable from a regular "unknown" value. Now it returns the numeric id as a string. The string is allocated with alloca(), which is desired but one should be aware of the pitfalls: - prevents the caller from being inlined - bad idea to do in a loop.
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