blob: ec97c1d67d7c0d20954d0e4a2990a918de722945 [file] [log] [blame]
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1997-2005
* Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)input.h 8.2 (Berkeley) 5/4/95
*/
/* PEOF (the end of file marker) is defined in syntax.h */
enum {
INPUT_PUSH_FILE = 1,
INPUT_NOFILE_OK = 2,
};
struct alias;
struct strpush {
struct strpush *prev; /* preceding string on stack */
char *prevstring;
int prevnleft;
struct alias *ap; /* if push was associated with an alias */
char *string; /* remember the string since it may change */
/* Remember last two characters for pungetc. */
int lastc[2];
/* Number of outstanding calls to pungetc. */
int unget;
};
/*
* The parsefile structure pointed to by the global variable parsefile
* contains information about the current file being read.
*/
struct parsefile {
struct parsefile *prev; /* preceding file on stack */
int linno; /* current line */
int fd; /* file descriptor (or -1 if string) */
int nleft; /* number of chars left in this line */
int lleft; /* number of chars left in this buffer */
char *nextc; /* next char in buffer */
char *buf; /* input buffer */
struct strpush *strpush; /* for pushing strings at this level */
struct strpush basestrpush; /* so pushing one is fast */
/* Remember last two characters for pungetc. */
int lastc[2];
/* Number of outstanding calls to pungetc. */
int unget;
};
extern struct parsefile *parsefile;
/*
* The input line number. Input.c just defines this variable, and saves
* and restores it when files are pushed and popped. The user of this
* package must set its value.
*/
#define plinno (parsefile->linno)
int pgetc(void);
int pgetc2(void);
void pungetc(void);
void pushstring(char *, void *);
void popstring(void);
int setinputfile(const char *, int);
void setinputstring(char *);
void popfile(void);
void popallfiles(void);
void closescript(void);