osx man page for free_printf_comp

XPRINTF_COMP(3) 					   BSD Library Functions Manual 					   XPRINTF_COMP(3)

NAME
     free_printf_comp, new_printf_comp -- extensible printf compilation

SYNOPSIS
     #include <printf.h>

     void
     free_printf_comp(printf_comp_t pc);

     printf_comp_t
     new_printf_comp(printf_domain_t restrict domain, locale_t restrict loc, const char * restrict fmt);

DESCRIPTION
     To ameliorate some of the slowness caused by the extra overhead in extensible printf (see xprintf(5)), a compile/execute mechanism has been
     created.  The new_printf_comp() function compiles the given format string, along with a printf domain (see xprintf_domain(3)) and an extended
     locale (see xlocale(3)), and returns a printf_comp_t structure.  The domain may not be NULL, but the locale can be NULL, which means to use
     the current locale, either the per-thread locale if it was set, or else the global locale.  Because the printf_comp_t structure records the
     domain and locale, care should be taken if either of these are changed.

     Once a printf_comp_t structure is created, it can be passed to one of the extensible printf execution variants, described in xprintf_exec(3),
     along with the necessary arguments.  Creating the printf_comp_t structure needs to be done only once, but it can be passed to extensible
     printf execution variants any number of times.

     When the printf_comp_t structure is no longer needed, it should be passed to free_printf_comp() to release internal memory.

RETURN VALUES
     The new_printf_comp() function returns the new structure, or NULL on error (usually NULL domain or out of memory condition).

SEE ALSO
     xlocale(3), xprintf_domain(3), xprintf_exec(3), xprintf(5)

Darwin								   Aug 19, 2012 							    Darwin