bin/ed/glbl.c

   1 /* glob.c: This file contains the global command routines for the ed line
   2    editor */
   3 /*-
   4  * Copyright (c) 1993 Andrew Moore, Talke Studio.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * @(#)glob.c,v 1.1 1994/02/01 00:34:40 alm Exp
  29  * $FreeBSD: head/bin/ed/glbl.c 241720 2012-10-19 05:43:38Z ed $
  30  */
  31
  32 #include <sys/types.h>
  33
  34 #include <sys/ioctl.h>
  35 #include <sys/wait.h>
  36
  37 #include "ed.h"
  38
  39
  40 /* build_active_list:  add line matching a pattern to the global-active list */
  41 int
  42 build_active_list(int isgcmd)
  43 {
  44         pattern_t *pat;
  45         line_t *lp;
  46         long n;
  47         char *s;
  48         char delimiter;
  49
  50         if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
  51                 errmsg = "invalid pattern delimiter";
  52                 return ERR;
  53         } else if ((pat = get_compiled_pattern()) == NULL)
  54                 return ERR;
  55         else if (*ibufp == delimiter)
  56                 ibufp++;
  57         clear_active_list();
  58         lp = get_addressed_line_node(first_addr);
  59         for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
  60                 if ((s = get_sbuf_line(lp)) == NULL)
  61                         return ERR;
  62                 if (isbinary)
  63                         NUL_TO_NEWLINE(s, lp->len);
  64                 if (!(regexec(pat, s, 0, NULL, 0) == isgcmd) &&
  65                     set_active_node(lp) < 0)
  66                         return ERR;
  67         }
  68         return 0;
  69 }
  70
  71
  72 /* exec_global: apply command list in the command buffer to the active
  73    lines in a range; return command status */
  74 long
  75 exec_global(int interact, int gflag)
  76 {
  77         static char *ocmd = NULL;
  78         static int ocmdsz = 0;
  79
  80         line_t *lp = NULL;
  81         int status;
  82         int n;
  83         char *cmd = NULL;
  84
  85 #ifdef BACKWARDS
  86         if (!interact)
  87                 if (!strcmp(ibufp, "\n"))
  88                         cmd = "p\n";            /* null cmd-list == `p' */
  89                 else if ((cmd = get_extended_line(&n, 0)) == NULL)
  90                         return ERR;
  91 #else
  92         if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
  93                 return ERR;
  94 #endif
  95         clear_undo_stack();
  96         while ((lp = next_active_node()) != NULL) {
  97                 if ((current_addr = get_line_node_addr(lp)) < 0)
  98                         return ERR;
  99                 if (interact) {
 100                         /* print current_addr; get a command in global syntax */
 101                         if (display_lines(current_addr, current_addr, gflag) < 0)
 102                                 return ERR;
 103                         while ((n = get_tty_line()) > 0 &&
 104                             ibuf[n - 1] != '\n')
 105                                 clearerr(stdin);
 106                         if (n < 0)
 107                                 return ERR;
 108                         else if (n == 0) {
 109                                 errmsg = "unexpected end-of-file";
 110                                 return ERR;
 111                         } else if (n == 1 && !strcmp(ibuf, "\n"))
 112                                 continue;
 113                         else if (n == 2 && !strcmp(ibuf, "&\n")) {
 114                                 if (cmd == NULL) {
 115                                         errmsg = "no previous command";
 116                                         return ERR;
 117                                 } else cmd = ocmd;
 118                         } else if ((cmd = get_extended_line(&n, 0)) == NULL)
 119                                 return ERR;
 120                         else {
 121                                 REALLOC(ocmd, ocmdsz, n + 1, ERR);
 122                                 memcpy(ocmd, cmd, n + 1);
 123                                 cmd = ocmd;
 124                         }
 125
 126                 }
 127                 ibufp = cmd;
 128                 for (; *ibufp;)
 129                         if ((status = extract_addr_range()) < 0 ||
 130                             (status = exec_command()) < 0 ||
 131                             (status > 0 && (status = display_lines(
 132                             current_addr, current_addr, status)) < 0))
 133                                 return status;
 134         }
 135         return 0;
 136 }
 137
 138
 139 static line_t **active_list;    /* list of lines active in a global command */
 140 static long active_last;        /* index of last active line in active_list */
 141 static long active_size;        /* size of active_list */
 142 static long active_ptr;         /* active_list index (non-decreasing) */
 143 static long active_ndx;         /* active_list index (modulo active_last) */
 144
 145 /* set_active_node: add a line node to the global-active list */
 146 int
 147 set_active_node(line_t *lp)
 148 {
 149         if (active_last + 1 > active_size) {
 150                 int ti = active_size;
 151                 line_t **ts;
 152                 SPL1();
 153 #if defined(sun) || defined(NO_REALLOC_NULL)
 154                 if (active_list != NULL) {
 155 #endif
 156                         if ((ts = (line_t **) realloc(active_list,
 157                             (ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
 158                                 fprintf(stderr, "%s\n", strerror(errno));
 159                                 errmsg = "out of memory";
 160                                 SPL0();
 161                                 return ERR;
 162                         }
 163 #if defined(sun) || defined(NO_REALLOC_NULL)
 164                 } else {
 165                         if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
 166                             sizeof(line_t **))) == NULL) {
 167                                 fprintf(stderr, "%s\n", strerror(errno));
 168                                 errmsg = "out of memory";
 169                                 SPL0();
 170                                 return ERR;
 171                         }
 172                 }
 173 #endif
 174                 active_size = ti;
 175                 active_list = ts;
 176                 SPL0();
 177         }
 178         active_list[active_last++] = lp;
 179         return 0;
 180 }
 181
 182
 183 /* unset_active_nodes: remove a range of lines from the global-active list */
 184 void
 185 unset_active_nodes(line_t *np, line_t *mp)
 186 {
 187         line_t *lp;
 188         long i;
 189
 190         for (lp = np; lp != mp; lp = lp->q_forw)
 191                 for (i = 0; i < active_last; i++)
 192                         if (active_list[active_ndx] == lp) {
 193                                 active_list[active_ndx] = NULL;
 194                                 active_ndx = INC_MOD(active_ndx, active_last - 1);
 195                                 break;
 196                         } else  active_ndx = INC_MOD(active_ndx, active_last - 1);
 197 }
 198
 199
 200 /* next_active_node: return the next global-active line node */
 201 line_t *
 202 next_active_node(void)
 203 {
 204         while (active_ptr < active_last && active_list[active_ptr] == NULL)
 205                 active_ptr++;
 206         return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
 207 }
 208
 209
 210 /* clear_active_list: clear the global-active list */
 211 void
 212 clear_active_list(void)
 213 {
 214         SPL1();
 215         active_size = active_last = active_ptr = active_ndx = 0;
 216         free(active_list);
 217         active_list = NULL;
 218         SPL0();
 219 }