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#if 0 #include <stdio.h> #include <stdarg.h> #include "_stdio.h" int vsnprintf(char * restrict s, size_t n, const char *format, va_list arg) { struct io_options opt = { .fnname = __func__, .string = s, .maxlen = n, }; return __printf(&opt, format, arg); } /* STDC(199901) */ #endif