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/*!
* @file
* @brief Utilities for string construction
*/
/*!
* @brief Returns hex digit for given integer
*
* Will return appropriate `char` in range 0-F
* for input in range 0-15. Can be abused to
* return decimal digits for range 0-9.
*/
char nibble_hex(short h);
/*!
* @brief Concatenate arbitrary number of strings into
* dynamically allocated buffer
*
* catn_alloc() concats the `n` given strings into a
* dynamically allocated and resized buffer and returns
* it. This buffer must be cleaned up by `free()` before
* it goes out of scope.
*
* @param n number of strings given as `va_args`
* @return pointer to concatenated strings or `NULL` on error.
*/
char *catn_alloc(size_t n, ...);
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