380 lines
8.3 KiB
C
380 lines
8.3 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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* 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
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#endif
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static const char rcsid[] =
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"$Id: main.c,v 1.7 1997/08/11 07:21:03 charnier Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <locale.h>
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#include <regex.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "defs.h"
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#include "extern.h"
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/*
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* Linked list of units (strings and files) to be compiled
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*/
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struct s_compunit {
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struct s_compunit *next;
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enum e_cut {CU_FILE, CU_STRING} type;
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char *s; /* Pointer to string or fname */
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};
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/*
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* Linked list pointer to compilation units and pointer to current
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* next pointer.
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*/
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static struct s_compunit *script, **cu_nextp = &script;
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/*
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* Linked list of files to be processed
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*/
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struct s_flist {
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char *fname;
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struct s_flist *next;
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};
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/*
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* Linked list pointer to files and pointer to current
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* next pointer.
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*/
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static struct s_flist *files, **fl_nextp = &files;
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int aflag, eflag, nflag;
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/*
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* Current file and line number; line numbers restart across compilation
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* units, but span across input files.
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*/
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char *fname; /* File name. */
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u_long linenum;
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int lastline; /* TRUE on the last line of the last file */
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static void add_compunit __P((enum e_cut, char *));
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static void add_file __P((char *));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int c, fflag;
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(void) setlocale(LC_ALL, "");
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fflag = 0;
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while ((c = getopt(argc, argv, "ae:f:n")) != -1)
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switch (c) {
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case 'a':
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aflag = 1;
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break;
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case 'e':
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eflag = 1;
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add_compunit(CU_STRING, optarg);
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break;
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case 'f':
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fflag = 1;
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add_compunit(CU_FILE, optarg);
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break;
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case 'n':
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nflag = 1;
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break;
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default:
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case '?':
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usage();
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}
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argc -= optind;
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argv += optind;
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/* First usage case; script is the first arg */
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if (!eflag && !fflag && *argv) {
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add_compunit(CU_STRING, *argv);
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argv++;
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}
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compile();
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/* Continue with first and start second usage */
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if (*argv)
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for (; *argv; argv++)
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add_file(*argv);
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else
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add_file(NULL);
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process();
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cfclose(prog, NULL);
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if (fclose(stdout))
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err(1, "stdout");
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exit (0);
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}
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static void
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usage()
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{
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(void)fprintf(stderr, "%s\n%s\n",
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"usage: sed script [-an] [file ...]",
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" sed [-an] [-e script] ... [-f script_file] ... [file ...]");
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exit(1);
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}
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/*
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* Like fgets, but go through the chain of compilation units chaining them
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* together. Empty strings and files are ignored.
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*/
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char *
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cu_fgets(buf, n, more)
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char *buf;
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int n;
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int *more;
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{
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static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
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static FILE *f; /* Current open file */
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static char *s; /* Current pointer inside string */
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static char string_ident[30];
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char *p;
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again:
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switch (state) {
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case ST_EOF:
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if (script == NULL) {
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if (more != NULL)
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*more = 0;
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return (NULL);
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}
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linenum = 0;
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switch (script->type) {
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case CU_FILE:
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if ((f = fopen(script->s, "r")) == NULL)
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err(1, "%s", script->s);
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fname = script->s;
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state = ST_FILE;
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goto again;
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case CU_STRING:
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if ((snprintf(string_ident,
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sizeof(string_ident), "\"%s\"", script->s)) >=
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sizeof(string_ident) - 1)
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(void)strcpy(string_ident +
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sizeof(string_ident) - 6, " ...\"");
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fname = string_ident;
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s = script->s;
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state = ST_STRING;
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goto again;
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}
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case ST_FILE:
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if ((p = fgets(buf, n, f)) != NULL) {
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linenum++;
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if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
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nflag = 1;
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if (more != NULL)
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*more = !feof(f);
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return (p);
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}
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script = script->next;
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(void)fclose(f);
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state = ST_EOF;
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goto again;
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case ST_STRING:
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if (linenum == 0 && s[0] == '#' && s[1] == 'n')
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nflag = 1;
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p = buf;
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for (;;) {
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if (n-- <= 1) {
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*p = '\0';
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linenum++;
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if (more != NULL)
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*more = 1;
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return (buf);
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}
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switch (*s) {
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case '\0':
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state = ST_EOF;
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if (s == script->s) {
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script = script->next;
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goto again;
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} else {
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script = script->next;
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*p = '\0';
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linenum++;
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if (more != NULL)
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*more = 0;
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return (buf);
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}
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case '\n':
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*p++ = '\n';
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*p = '\0';
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s++;
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linenum++;
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if (more != NULL)
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*more = 0;
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return (buf);
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default:
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*p++ = *s++;
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}
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}
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}
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/* NOTREACHED */
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return (NULL);
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}
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/*
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* Like fgets, but go through the list of files chaining them together.
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* Set len to the length of the line.
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*/
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int
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mf_fgets(sp, spflag)
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SPACE *sp;
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enum e_spflag spflag;
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{
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static FILE *f; /* Current open file */
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size_t len;
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char *p;
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int c;
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if (f == NULL)
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/* Advance to first non-empty file */
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for (;;) {
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if (files == NULL) {
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lastline = 1;
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return (0);
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}
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if (files->fname == NULL) {
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f = stdin;
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fname = "stdin";
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} else {
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fname = files->fname;
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if ((f = fopen(fname, "r")) == NULL)
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err(1, "%s", fname);
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}
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if ((c = getc(f)) != EOF) {
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(void)ungetc(c, f);
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break;
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}
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(void)fclose(f);
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files = files->next;
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}
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if (lastline) {
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sp->len = 0;
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return (0);
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}
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/*
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* Use fgetln so that we can handle essentially infinite input data.
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* Can't use the pointer into the stdio buffer as the process space
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* because the ungetc() can cause it to move.
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*/
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p = fgetln(f, &len);
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if (ferror(f))
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errx(1, "%s: %s", fname, strerror(errno ? errno : EIO));
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cspace(sp, p, len, spflag);
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linenum++;
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/* Advance to next non-empty file */
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while ((c = getc(f)) == EOF) {
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(void)fclose(f);
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files = files->next;
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if (files == NULL) {
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lastline = 1;
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return (1);
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}
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if (files->fname == NULL) {
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f = stdin;
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fname = "stdin";
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} else {
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fname = files->fname;
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if ((f = fopen(fname, "r")) == NULL)
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err(1, "%s", fname);
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}
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}
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(void)ungetc(c, f);
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return (1);
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}
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/*
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* Add a compilation unit to the linked list
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*/
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static void
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add_compunit(type, s)
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enum e_cut type;
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char *s;
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{
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struct s_compunit *cu;
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cu = xmalloc(sizeof(struct s_compunit));
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cu->type = type;
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cu->s = s;
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cu->next = NULL;
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*cu_nextp = cu;
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cu_nextp = &cu->next;
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}
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/*
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* Add a file to the linked list
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*/
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static void
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add_file(s)
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char *s;
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{
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struct s_flist *fp;
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fp = xmalloc(sizeof(struct s_flist));
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fp->next = NULL;
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*fl_nextp = fp;
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fp->fname = s;
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fl_nextp = &fp->next;
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}
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