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: src/bin/ed/glbl.c,v 1.13 2002/06/30 05:13:53 obrien Exp $
  30  * $DragonFly: src/bin/ed/glbl.c,v 1.4 2007/04/06 23:36:54 pavalos Exp $
  31  */
  32
  33 #include <sys/types.h>
  34
  35 #include <sys/ioctl.h>
  36 #include <sys/wait.h>
  37
  38 #include "ed.h"
  39
  40
  41 /* build_active_list:  add line matching a pattern to the global-active list */
  42 int
  43 build_active_list(int isgcmd)
  44 {
  45         pattern_t *pat;
  46         line_t *lp;
  47         long n;
  48         char *s;
  49         char delimiter;
  50
  51         if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
  52                 errmsg = "invalid pattern delimiter";
  53                 return ERR;
  54         } else if ((pat = get_compiled_pattern()) == NULL)
  55                 return ERR;
  56         else if (*ibufp == delimiter)
  57                 ibufp++;
  58         clear_active_list();
  59         lp = get_addressed_line_node(first_addr);
  60         for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
  61                 if ((s = get_sbuf_line(lp)) == NULL)
  62                         return ERR;
  63                 if (isbinary)
  64                         NUL_TO_NEWLINE(s, lp->len);
  65                 if (!regexec(pat, s, 0, NULL, 0) == isgcmd &&
  66                     set_active_node(lp) < 0)
  67                         return ERR;
  68         }
  69         return 0;
  70 }
  71
  72
  73 /* exec_global: apply command list in the command buffer to the active
  74    lines in a range; return command status */
  75 long
  76 exec_global(int interact, int gflag)
  77 {
  78         static char *ocmd = NULL;
  79         static int ocmdsz = 0;
  80
  81         line_t *lp = NULL;
  82         int status;
  83         int n;
  84         char *cmd = NULL;
  85
  86 #ifdef BACKWARDS
  87         if (!interact)
  88                 if (!strcmp(ibufp, "\n"))
  89                         cmd = "p\n";            /* null cmd-list == `p' */
  90                 else if ((cmd = get_extended_line(&n, 0)) == NULL)
  91                         return ERR;
  92 #else
  93         if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
  94                 return ERR;
  95 #endif
  96         clear_undo_stack();
  97         while ((lp = next_active_node()) != NULL) {
  98                 if ((current_addr = get_line_node_addr(lp)) < 0)
  99                         return ERR;
 100                 if (interact) {
 101                         /* print current_addr; get a command in global syntax */
 102                         if (display_lines(current_addr, current_addr, gflag) < 0)
 103                                 return ERR;
 104                         while ((n = get_tty_line()) > 0 &&
 105                             ibuf[n - 1] != '\n')
 106                                 clearerr(stdin);
 107                         if (n < 0)
 108                                 return ERR;
 109                         else if (n == 0) {
 110                                 errmsg = "unexpected end-of-file";
 111                                 return ERR;
 112                         } else if (n == 1 && !strcmp(ibuf, "\n"))
 113                                 continue;
 114                         else if (n == 2 && !strcmp(ibuf, "&\n")) {
 115                                 if (cmd == NULL) {
 116                                         errmsg = "no previous command";
 117                                         return ERR;
 118                                 } else cmd = ocmd;
 119                         } else if ((cmd = get_extended_line(&n, 0)) == NULL)
 120                                 return ERR;
 121                         else {
 122                                 REALLOC(ocmd, ocmdsz, n + 1, ERR);
 123                                 memcpy(ocmd, cmd, n + 1);
 124                                 cmd = ocmd;
 125                         }
 126
 127                 }
 128                 ibufp = cmd;
 129                 for (; *ibufp;)
 130                         if ((status = extract_addr_range()) < 0 ||
 131                             (status = exec_command()) < 0 ||
 132                             (status > 0 && (status = display_lines(
 133                             current_addr, current_addr, status)) < 0))
 134                                 return status;
 135         }
 136         return 0;
 137 }
 138
 139
 140 line_t **active_list;           /* list of lines active in a global command */
 141 long active_last;               /* index of last active line in active_list */
 142 long active_size;               /* size of active_list */
 143 long active_ptr;                /* active_list index (non-decreasing) */
 144 long active_ndx;                /* active_list index (modulo active_last) */
 145
 146 /* set_active_node: add a line node to the global-active list */
 147 int
 148 set_active_node(line_t *lp)
 149 {
 150         if (active_last + 1 > active_size) {
 151                 int ti = active_size;
 152                 line_t **ts;
 153                 SPL1();
 154 #if defined(sun) || defined(NO_REALLOC_NULL)
 155                 if (active_list != NULL) {
 156 #endif
 157                         if ((ts = (line_t **) realloc(active_list,
 158                             (ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
 159                                 fprintf(stderr, "%s\n", strerror(errno));
 160                                 errmsg = "out of memory";
 161                                 SPL0();
 162                                 return ERR;
 163                         }
 164 #if defined(sun) || defined(NO_REALLOC_NULL)
 165                 } else {
 166                         if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
 167                             sizeof(line_t **))) == NULL) {
 168                                 fprintf(stderr, "%s\n", strerror(errno));
 169                                 errmsg = "out of memory";
 170                                 SPL0();
 171                                 return ERR;
 172                         }
 173                 }
 174 #endif
 175                 active_size = ti;
 176                 active_list = ts;
 177                 SPL0();
 178         }
 179         active_list[active_last++] = lp;
 180         return 0;
 181 }
 182
 183
 184 /* unset_active_nodes: remove a range of lines from the global-active list */
 185 void
 186 unset_active_nodes(line_t *np, line_t *mp)
 187 {
 188         line_t *lp;
 189         long i;
 190
 191         for (lp = np; lp != mp; lp = lp->q_forw)
 192                 for (i = 0; i < active_last; i++)
 193                         if (active_list[active_ndx] == lp) {
 194                                 active_list[active_ndx] = NULL;
 195                                 active_ndx = INC_MOD(active_ndx, active_last - 1);
 196                                 break;
 197                         } else  active_ndx = INC_MOD(active_ndx, active_last - 1);
 198 }
 199
 200
 201 /* next_active_node: return the next global-active line node */
 202 line_t *
 203 next_active_node(void)
 204 {
 205         while (active_ptr < active_last && active_list[active_ptr] == NULL)
 206                 active_ptr++;
 207         return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
 208 }
 209
 210
 211 /* clear_active_list: clear the global-active list */
 212 void
 213 clear_active_list(void)
 214 {
 215         SPL1();
 216         active_size = active_last = active_ptr = active_ndx = 0;
 217         free(active_list);
 218         active_list = NULL;
 219         SPL0();
 220 }