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Diffstat (limited to 'bin/dash/src/input.h')
-rw-r--r-- | bin/dash/src/input.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/bin/dash/src/input.h b/bin/dash/src/input.h new file mode 100644 index 00000000..8acc6e9f --- /dev/null +++ b/bin/dash/src/input.h @@ -0,0 +1,101 @@ +/*- + * 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 unwindfiles(struct parsefile *); +void popallfiles(void); |