bin/ed/glbl.c

   1 /*      $OpenBSD: glbl.c,v 1.13 2012/12/04 02:40:48 deraadt Exp $       */
   2 /*      $NetBSD: glbl.c,v 1.2 1995/03/21 09:04:41 cgd Exp $     */
   3
   4 /* glob.c: This file contains the global command routines for the ed line
   5    editor */
   6 /*-
   7  * Copyright (c) 1993 Andrew Moore, Talke Studio.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/ioctl.h>
  33 #include <sys/wait.h>
  34
  35 #include "ed.h"
  36
  37
  38 /* build_active_list:  add line matching a pattern to the global-active list */
  39 int
  40 build_active_list(int isgcmd)
  41 {
  42         pattern_t *pat;
  43         line_t *lp;
  44         int n;
  45         char *s;
  46         char delimiter;
  47
  48         if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
  49                 seterrmsg("invalid pattern delimiter");
  50                 return ERR;
  51         } else if ((pat = get_compiled_pattern()) == NULL)
  52                 return ERR;
  53         else if (*ibufp == delimiter)
  54                 ibufp++;
  55         clear_active_list();
  56         lp = get_addressed_line_node(first_addr);
  57         for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
  58                 if ((s = get_sbuf_line(lp)) == NULL)
  59                         return ERR;
  60                 if (isbinary)
  61                         NUL_TO_NEWLINE(s, lp->len);
  62                 if (!regexec(pat, s, 0, NULL, 0) == isgcmd &&
  63                     set_active_node(lp) < 0)
  64                         return ERR;
  65         }
  66         return 0;
  67 }
  68
  69
  70 /* exec_global: apply command list in the command buffer to the active
  71    lines in a range; return command status */
  72 int
  73 exec_global(int interact, int gflag)
  74 {
  75         static char *ocmd = NULL;
  76         static int ocmdsz = 0;
  77
  78         line_t *lp = NULL;
  79         int status;
  80         int n;
  81         char *cmd = NULL;
  82
  83 #ifdef BACKWARDS
  84         if (!interact) {
  85                 if (!strcmp(ibufp, "\n"))
  86                         cmd = "p\n";            /* null cmd-list == `p' */
  87                 else if ((cmd = get_extended_line(&n, 0)) == NULL)
  88                         return ERR;
  89         }
  90 #else
  91         if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
  92                 return ERR;
  93 #endif
  94         clear_undo_stack();
  95         while ((lp = next_active_node()) != NULL) {
  96                 if ((current_addr = get_line_node_addr(lp)) < 0)
  97                         return ERR;
  98                 if (interact) {
  99                         /* print current_addr; get a command in global syntax */
 100                         if (display_lines(current_addr, current_addr, gflag) < 0)
 101                                 return ERR;
 102                         while ((n = get_tty_line()) > 0 &&
 103                             ibuf[n - 1] != '\n')
 104                                 clearerr(stdin);
 105                         if (n < 0)
 106                                 return ERR;
 107                         else if (n == 0) {
 108                                 seterrmsg("unexpected end-of-file");
 109                                 return ERR;
 110                         } else if (n == 1 && !strcmp(ibuf, "\n"))
 111                                 continue;
 112                         else if (n == 2 && !strcmp(ibuf, "&\n")) {
 113                                 if (cmd == NULL) {
 114                                         seterrmsg("no previous command");
 115                                         return ERR;
 116                                 } else cmd = ocmd;
 117                         } else if ((cmd = get_extended_line(&n, 0)) == NULL)
 118                                 return ERR;
 119                         else {
 120                                 REALLOC(ocmd, ocmdsz, n + 1, ERR);
 121                                 memcpy(ocmd, cmd, n + 1);
 122                                 cmd = ocmd;
 123                         }
 124
 125                 }
 126                 ibufp = cmd;
 127                 for (; *ibufp;)
 128                         if ((status = extract_addr_range()) < 0 ||
 129                             (status = exec_command()) < 0 ||
 130                             (status > 0 && (status = display_lines(
 131                             current_addr, current_addr, status)) < 0))
 132                                 return status;
 133         }
 134         return 0;
 135 }
 136
 137
 138 line_t **active_list;           /* list of lines active in a global command */
 139 int active_last;                /* index of last active line in active_list */
 140 int active_size;                /* size of active_list */
 141 int active_ptr;                 /* active_list index (non-decreasing) */
 142 int active_ndx;                 /* active_list index (modulo active_last) */
 143
 144 /* set_active_node: add a line node to the global-active list */
 145 int
 146 set_active_node(line_t *lp)
 147 {
 148         if (active_last + 1 > active_size) {
 149                 int ti = active_size;
 150                 line_t **ts;
 151                 SPL1();
 152                 if ((ts = (line_t **) realloc(active_list,
 153                     (ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
 154                         perror(NULL);
 155                         seterrmsg("out of memory");
 156                         SPL0();
 157                         return ERR;
 158                 }
 159                 active_size = ti;
 160                 active_list = ts;
 161                 SPL0();
 162         }
 163         active_list[active_last++] = lp;
 164         return 0;
 165 }
 166
 167
 168 /* unset_active_nodes: remove a range of lines from the global-active list */
 169 void
 170 unset_active_nodes(line_t *np, line_t *mp)
 171 {
 172         line_t *lp;
 173         int i;
 174
 175         for (lp = np; lp != mp; lp = lp->q_forw)
 176                 for (i = 0; i < active_last; i++)
 177                         if (active_list[active_ndx] == lp) {
 178                                 active_list[active_ndx] = NULL;
 179                                 active_ndx = INC_MOD(active_ndx, active_last - 1);
 180                                 break;
 181                         } else  active_ndx = INC_MOD(active_ndx, active_last - 1);
 182 }
 183
 184
 185 /* next_active_node: return the next global-active line node */
 186 line_t *
 187 next_active_node(void)
 188 {
 189         while (active_ptr < active_last && active_list[active_ptr] == NULL)
 190                 active_ptr++;
 191         return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
 192 }
 193
 194
 195 /* clear_active_list: clear the global-active list */
 196 void
 197 clear_active_list(void)
 198 {
 199         SPL1();
 200         active_size = active_last = active_ptr = active_ndx = 0;
 201         free(active_list);
 202         active_list = NULL;
 203         SPL0();
 204 }