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#include "stdio_impl.h" size_t __freadahead(FILE *f) { return f->rend - f->rpos; } const char *__freadptr(FILE *f, size_t *sizep) { size_t size = f->rend - f->rpos; if (!size) return 0; *sizep = size; return f->rpos; } void __freadptrinc(FILE *f, size_t inc) { f->rpos += inc; } void __fseterr(FILE *f) { f->flags |= F_ERR; }