bin/ed/glbl.c

   1 /*      $NetBSD: glbl.c,v 1.9 2015/08/28 11:29:48 joerg Exp $   */
   2
   3 /* glob.c: This file contains the global command routines for the ed line
   4    editor */
   5 /*-
   6  * Copyright (c) 1993 Andrew Moore, Talke Studio.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 #ifndef lint
  33 #if 0
  34 static char *rcsid = "@(#)glob.c,v 1.1 1994/02/01 00:34:40 alm Exp";
  35 #else
  36 __RCSID("$NetBSD: glbl.c,v 1.9 2015/08/28 11:29:48 joerg Exp $");
  37 #endif
  38 #endif /* not lint */
  39
  40 #include <sys/ioctl.h>
  41 #include <sys/wait.h>
  42
  43 #include "ed.h"
  44
  45
  46 /* build_active_list:  add line matching a pattern to the global-active list */
  47 int
  48 build_active_list(int isgcmd)
  49 {
  50         pattern_t *pat;
  51         line_t *lp;
  52         long n;
  53         char *s;
  54         char delimiter;
  55
  56         if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
  57                 seterrmsg("invalid pattern delimiter");
  58                 return ERR;
  59         } else if ((pat = get_compiled_pattern()) == NULL)
  60                 return ERR;
  61         else if (*ibufp == delimiter)
  62                 ibufp++;
  63         clear_active_list();
  64         lp = get_addressed_line_node(first_addr);
  65         for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
  66                 if ((s = get_sbuf_line(lp)) == NULL)
  67                         return ERR;
  68                 if (isbinary)
  69                         NUL_TO_NEWLINE(s, lp->len);
  70                 if ((!regexec(pat, s, 0, NULL, 0)) == isgcmd &&
  71                     set_active_node(lp) < 0)
  72                         return ERR;
  73         }
  74         return 0;
  75 }
  76
  77
  78 /* exec_global: apply command list in the command buffer to the active
  79    lines in a range; return command status */
  80 long
  81 exec_global(int interact, int gflag)
  82 {
  83         static char *ocmd = NULL;
  84         static int ocmdsz = 0;
  85
  86         line_t *lp = NULL;
  87         int status;
  88         int n;
  89         char *cmd = NULL;
  90 #ifdef BACKWARDS
  91         char cmdp[] = "p\n";
  92
  93         if (!interact) {
  94                 if (!strcmp(ibufp, "\n"))
  95                         cmd = cmdp;             /* null cmd-list == `p' */
  96                 else if ((cmd = get_extended_line(&n, 0)) == NULL)
  97                         return ERR;
  98         }
  99 #else
 100         if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
 101                 return ERR;
 102 #endif
 103         clear_undo_stack();
 104         while ((lp = next_active_node()) != NULL) {
 105                 if ((current_addr = get_line_node_addr(lp)) < 0)
 106                         return ERR;
 107                 if (interact) {
 108                         /* print current_addr; get a command in global syntax */
 109                         if (display_lines(current_addr, current_addr, gflag) < 0)
 110                                 return ERR;
 111                         while ((n = get_tty_line()) > 0 &&
 112                             ibuf[n - 1] != '\n')
 113                                 clearerr(stdin);
 114                         if (n < 0)
 115                                 return ERR;
 116                         else if (n == 0) {
 117                                 seterrmsg("unexpected end-of-file");
 118                                 return ERR;
 119                         } else if (n == 1 && !strcmp(ibuf, "\n"))
 120                                 continue;
 121                         else if (n == 2 && !strcmp(ibuf, "&\n")) {
 122                                 if (cmd == NULL) {
 123                                         seterrmsg("no previous command");
 124                                         return ERR;
 125                                 } else cmd = ocmd;
 126                         } else if ((cmd = get_extended_line(&n, 0)) == NULL)
 127                                 return ERR;
 128                         else {
 129                                 REALLOC(ocmd, ocmdsz, n + 1, ERR);
 130                                 memcpy(ocmd, cmd, n + 1);
 131                                 cmd = ocmd;
 132                         }
 133
 134                 }
 135                 ibufp = cmd;
 136                 for (; *ibufp;)
 137                         if ((status = extract_addr_range()) < 0 ||
 138                             (status = exec_command()) < 0 ||
 139                             (status > 0 && (status = display_lines(
 140                             current_addr, current_addr, status)) < 0))
 141                                 return status;
 142         }
 143         return 0;
 144 }
 145
 146
 147 line_t **active_list;           /* list of lines active in a global command */
 148 long active_last;               /* index of last active line in active_list */
 149 long active_size;               /* size of active_list */
 150 long active_ptr;                /* active_list index (non-decreasing) */
 151 long active_ndx;                /* active_list index (modulo active_last) */
 152
 153 /* set_active_node: add a line node to the global-active list */
 154 int
 155 set_active_node(line_t *lp)
 156 {
 157         if (active_last + 1 > active_size) {
 158                 int ti = active_size;
 159                 line_t **ts;
 160                 SPL1();
 161 #if defined(sun) || defined(NO_REALLOC_NULL)
 162                 if (active_list != NULL) {
 163 #endif
 164                         if ((ts = (line_t **) realloc(active_list,
 165                             (ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
 166                                 fprintf(stderr, "%s\n", strerror(errno));
 167                                 seterrmsg("out of memory");
 168                                 SPL0();
 169                                 return ERR;
 170                         }
 171 #if defined(sun) || defined(NO_REALLOC_NULL)
 172                 } else {
 173                         if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
 174                             sizeof(line_t **))) == NULL) {
 175                                 fprintf(stderr, "%s\n", strerror(errno));
 176                                 seterrmsg("out of memory");
 177                                 SPL0();
 178                                 return ERR;
 179                         }
 180                 }
 181 #endif
 182                 active_size = ti;
 183                 active_list = ts;
 184                 SPL0();
 185         }
 186         active_list[active_last++] = lp;
 187         return 0;
 188 }
 189
 190
 191 /* unset_active_nodes: remove a range of lines from the global-active list */
 192 void
 193 unset_active_nodes(line_t *np, line_t *mp)
 194 {
 195         line_t *lp;
 196         long i;
 197
 198         for (lp = np; lp != mp; lp = lp->q_forw)
 199                 for (i = 0; i < active_last; i++)
 200                         if (active_list[active_ndx] == lp) {
 201                                 active_list[active_ndx] = NULL;
 202                                 active_ndx = INC_MOD(active_ndx, active_last - 1);
 203                                 break;
 204                         } else  active_ndx = INC_MOD(active_ndx, active_last - 1);
 205 }
 206
 207
 208 /* next_active_node: return the next global-active line node */
 209 line_t *
 210 next_active_node(void)
 211 {
 212         while (active_ptr < active_last && active_list[active_ptr] == NULL)
 213                 active_ptr++;
 214         return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
 215 }
 216
 217
 218 /* clear_active_list: clear the global-active list */
 219 void
 220 clear_active_list(void)
 221 {
 222         SPL1();
 223         active_size = active_last = active_ptr = active_ndx = 0;
 224         free(active_list);
 225         active_list = NULL;
 226         SPL0();
 227 }