80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* $OpenBSD: shf.h,v 1.8 2015/12/14 06:09:43 mmcc Exp $ */
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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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#define SHF_BSIZE 512
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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_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(const char *, int, int, int);
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struct shf *shf_fdopen(int, int, struct shf *);
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struct shf *shf_reopen(int, int, struct shf *);
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struct shf *shf_sopen(char *, int, int, struct shf *);
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int shf_close(struct shf *);
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int shf_fdclose(struct shf *);
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char *shf_sclose(struct shf *);
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int shf_flush(struct shf *);
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int shf_read(char *, int, struct shf *);
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char *shf_getse(char *, int, struct shf *);
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int shf_getchar(struct shf *s);
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int shf_ungetc(int, struct shf *);
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int shf_putchar(int, struct shf *);
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int shf_puts(const char *, struct shf *);
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int shf_write(const char *, int, struct shf *);
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int shf_fprintf(struct shf *, const char *, ...);
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int shf_snprintf(char *, int, const char *, ...);
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char *shf_smprintf(const char *, ...);
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int shf_vfprintf(struct shf *, const char *, va_list);
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#endif /* SHF_H */
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