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137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*-
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* Copyright (c) 1992 Diomidis Spinellis.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Diomidis Spinellis of Imperial College, University of London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)defs.h 8.1 (Berkeley) 6/6/93
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*/
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/*
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* Types of address specifications
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*/
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enum e_atype {
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AT_RE, /* Line that match RE */
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AT_LINE, /* Specific line */
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AT_LAST, /* Last line */
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};
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/*
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* Format of an address
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*/
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struct s_addr {
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enum e_atype type; /* Address type */
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union {
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u_long l; /* Line number */
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regex_t *r; /* Regular expression */
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} u;
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};
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/*
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* Substitution command
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*/
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struct s_subst {
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int n; /* Occurrence to subst. */
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int p; /* True if p flag */
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char *wfile; /* NULL if no wfile */
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int wfd; /* Cached file descriptor */
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regex_t *re; /* Regular expression */
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int maxbref; /* Largest backreference. */
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u_long linenum; /* Line number. */
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char *new; /* Replacement text */
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};
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/*
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* An internally compiled command.
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* Initialy, label references are stored in t, on a second pass they
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* are updated to pointers.
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*/
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struct s_command {
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struct s_command *next; /* Pointer to next command */
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struct s_addr *a1, *a2; /* Start and end address */
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char *t; /* Text for : a c i r w */
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union {
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struct s_command *c; /* Command(s) for b t { */
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struct s_subst *s; /* Substitute command */
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u_char *y; /* Replace command array */
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int fd; /* File descriptor for w */
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} u;
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char code; /* Command code */
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u_int nonsel:1; /* True if ! */
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u_int inrange:1; /* True if in range */
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};
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/*
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* Types of command arguments recognised by the parser
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*/
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enum e_args {
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EMPTY, /* d D g G h H l n N p P q x = \0 */
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TEXT, /* a c i */
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NONSEL, /* ! */
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GROUP, /* { */
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ENDGROUP, /* } */
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COMMENT, /* # */
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BRANCH, /* b t */
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LABEL, /* : */
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RFILE, /* r */
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WFILE, /* w */
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SUBST, /* s */
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TR /* y */
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};
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/*
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* Structure containing things to append before a line is read
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*/
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struct s_appends {
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enum {AP_STRING, AP_FILE} type;
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char *s;
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size_t len;
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};
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enum e_spflag {
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APPEND, /* Append to the contents. */
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REPLACE, /* Replace the contents. */
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};
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/*
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* Structure for a space (process, hold, otherwise).
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*/
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typedef struct {
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char *space; /* Current space pointer. */
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size_t len; /* Current length. */
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int deleted; /* If deleted. */
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char *back; /* Backing memory. */
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size_t blen; /* Backing memory length. */
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} SPACE;
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