int vsnprintf(char* str, size_t size, const char *format, va_list arg_ptr) { int n; struct str_data sd = { str, 0, size?size-1:0 }; struct arg_printf ap = { &sd, (int(*)(void*,size_t,void*)) swrite }; n=__v_printf(&ap,format,arg_ptr); if (str && size && n>=0) { if (size!=(size_t)-1 && ((size_t)n>=size)) str[size-1]=0; else str[n]=0; } return n; }
int vprintf(const char *format, va_list ap) { struct output_op _ap = { 0, (output_func*) &__libc_backend_outs }; return __v_printf(&_ap,format,ap); }