146111Sbostic /*- 261180Sbostic * Copyright (c) 1990, 1993 361180Sbostic * The Regents of the University of California. All rights reserved. 446111Sbostic * 546111Sbostic * This code is derived from software contributed to Berkeley by 646111Sbostic * Chris Torek. 746111Sbostic * 846111Sbostic * %sccs.include.redist.c% 946111Sbostic * 10*67485Smckusick * @(#)local.h 8.3 (Berkeley) 07/03/94 1146111Sbostic */ 1246111Sbostic 1346111Sbostic /* 1446111Sbostic * Information local to this implementation of stdio, 1546111Sbostic * in particular, macros and private variables. 1646111Sbostic */ 1746111Sbostic 18*67485Smckusick extern int __sflush __P((FILE *)); 19*67485Smckusick extern FILE *__sfp __P((void)); 20*67485Smckusick extern int __srefill __P((FILE *)); 21*67485Smckusick extern int __sread __P((void *, char *, int)); 22*67485Smckusick extern int __swrite __P((void *, char const *, int)); 23*67485Smckusick extern fpos_t __sseek __P((void *, fpos_t, int)); 24*67485Smckusick extern int __sclose __P((void *)); 25*67485Smckusick extern void __sinit __P((void)); 26*67485Smckusick extern void _cleanup __P((void)); 27*67485Smckusick extern void (*__cleanup) __P((void)); 28*67485Smckusick extern void __smakebuf __P((FILE *)); 29*67485Smckusick extern int __swhatbuf __P((FILE *, size_t *, int *)); 30*67485Smckusick extern int _fwalk __P((int (*)(FILE *))); 31*67485Smckusick extern int __swsetup __P((FILE *)); 32*67485Smckusick extern int __sflags __P((const char *, int *)); 3346111Sbostic 34*67485Smckusick extern int __sdidinit; 3546111Sbostic 3646111Sbostic /* 3746111Sbostic * Return true iff the given FILE cannot be written now. 3846111Sbostic */ 3946111Sbostic #define cantwrite(fp) \ 4046111Sbostic ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \ 4146111Sbostic __swsetup(fp)) 4246111Sbostic 4346111Sbostic /* 4446111Sbostic * Test whether the given stdio file has an active ungetc buffer; 4546111Sbostic * release such a buffer, without restoring ordinary unread data. 4646111Sbostic */ 4746111Sbostic #define HASUB(fp) ((fp)->_ub._base != NULL) 4846111Sbostic #define FREEUB(fp) { \ 4946111Sbostic if ((fp)->_ub._base != (fp)->_ubuf) \ 5046111Sbostic free((char *)(fp)->_ub._base); \ 5146111Sbostic (fp)->_ub._base = NULL; \ 5246111Sbostic } 5346111Sbostic 5446111Sbostic /* 5565334Sbostic * test for an fgetln() buffer. 5646111Sbostic */ 5746111Sbostic #define HASLB(fp) ((fp)->_lb._base != NULL) 5846111Sbostic #define FREELB(fp) { \ 5946111Sbostic free((char *)(fp)->_lb._base); \ 6046111Sbostic (fp)->_lb._base = NULL; \ 6146111Sbostic } 62