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#ifndef SHF_H
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# define SHF_H
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/*
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* Shell file I/O routines
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*/
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/* $Id$ */
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#define SHF_BSIZE 512
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#define shf_fileno(shf) ((shf)->fd)
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#define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
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#define shf_getc(shf) ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ : \
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shf_getchar(shf))
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#define shf_putc(c, shf) ((shf)->wnleft == 0 ? shf_putchar((c), (shf)) \
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: ((shf)->wnleft--, *(shf)->wp++ = (c)))
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#define shf_eof(shf) ((shf)->flags & SHF_EOF)
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#define shf_error(shf) ((shf)->flags & SHF_ERROR)
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#define shf_errno(shf) ((shf)->errno_)
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#define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
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/* Flags passed to shf_*open() */
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#define SHF_RD 0x0001
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#define SHF_WR 0x0002
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#define SHF_RDWR (SHF_RD|SHF_WR)
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#define SHF_ACCMODE 0x0003 /* mask */
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#define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
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#define SHF_UNBUF 0x0008 /* unbuffered I/O */
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#define SHF_CLEXEC 0x0010 /* set close on exec flag */
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#define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
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* (shf_open() only) */
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#define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
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#define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
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/* Flags used internally */
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#define SHF_STRING 0x0100 /* a string, not a file */
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#define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
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#define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
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#define SHF_ERROR 0x0800 /* read()/write() error */
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#define SHF_EOF 0x1000 /* read eof (sticky) */
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#define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
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#define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
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struct shf {
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int flags; /* see SHF_* */
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unsigned char *rp; /* read: current position in buffer */
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int rbsize; /* size of buffer (1 if SHF_UNBUF) */
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int rnleft; /* read: how much data left in buffer */
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unsigned char *wp; /* write: current position in buffer */
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int wbsize; /* size of buffer (0 if SHF_UNBUF) */
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int wnleft; /* write: how much space left in buffer */
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unsigned char *buf; /* buffer */
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int fd; /* file descriptor */
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int errno_; /* saved value of errno after error */
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int bsize; /* actual size of buf */
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Area *areap; /* area shf/buf were allocated in */
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};
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extern struct shf shf_iob[];
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struct shf *shf_open ARGS((const char *name, int oflags, int mode,
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int sflags));
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struct shf *shf_fdopen ARGS((int fd, int sflags, struct shf *shf));
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struct shf *shf_reopen ARGS((int fd, int sflags, struct shf *shf));
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struct shf *shf_sopen ARGS((char *buf, int bsize, int sflags,
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struct shf *shf));
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int shf_close ARGS((struct shf *shf));
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int shf_fdclose ARGS((struct shf *shf));
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char *shf_sclose ARGS((struct shf *shf));
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int shf_finish ARGS((struct shf *shf));
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int shf_flush ARGS((struct shf *shf));
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int shf_seek ARGS((struct shf *shf, off_t where, int from));
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int shf_read ARGS((char *buf, int bsize, struct shf *shf));
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char *shf_getse ARGS((char *buf, int bsize, struct shf *shf));
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int shf_getchar ARGS((struct shf *shf));
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int shf_ungetc ARGS((int c, struct shf *shf));
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int shf_putchar ARGS((int c, struct shf *shf));
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int shf_puts ARGS((const char *s, struct shf *shf));
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int shf_write ARGS((const char *buf, int nbytes, struct shf *shf));
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int shf_fprintf ARGS((struct shf *shf, const char *fmt, ...));
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int shf_snprintf ARGS((char *buf, int bsize, const char *fmt, ...));
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char *shf_smprintf ARGS((const char *fmt, ...));
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int shf_vfprintf ARGS((struct shf *, const char *fmt, va_list args));
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#endif /* SHF_H */
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