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96d68291af
While here, change how we check if the current line is the last one. Before, we just checked if there were more files after the current one. Now, we check the actual content of those files: they files may not have a line at all. This matches the definition of the "last line" by the Open Group. The new behavior is closer to GNU sed. PR: 160745 Phabric: https://phabric.freebsd.org/D431 Reviewed by: jilles Approved by: jilles Exp-run by: antoine
150 lines
4.3 KiB
C
150 lines
4.3 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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* 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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* $FreeBSD$
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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 = 1, /* Line that match RE */
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AT_LINE, /* Specific line */
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AT_RELLINE, /* Relative 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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int icase; /* True if I 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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unsigned 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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* Translate command.
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*/
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struct s_tr {
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unsigned char bytetab[256];
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struct trmulti {
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size_t fromlen;
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char from[MB_LEN_MAX];
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size_t tolen;
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char to[MB_LEN_MAX];
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} *multis;
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int nmultis;
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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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u_long startline; /* Start line number or zero */
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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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struct s_tr *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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};
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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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int append_newline; /* If originally terminated by \n. */
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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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