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
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/types.h>
  33 #include <sys/ioctl.h>
  34 #include <sys/wait.h>
  35
  36 #include "ed.h"
  37
  38
  39 /* build_active_list:  add line matching a pattern to the global-active list */
  40 int
  41 build_active_list(int isgcmd)
  42 {
  43         pattern_t *pat;
  44         line_t *lp;
  45         long n;
  46         char *s;
  47         char delimiter;
  48
  49         if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
  50                 errmsg = "invalid pattern delimiter";
  51                 return ERR;
  52         } else if ((pat = get_compiled_pattern()) == NULL)
  53                 return ERR;
  54         else if (*ibufp == delimiter)
  55                 ibufp++;
  56         clear_active_list();
  57         lp = get_addressed_line_node(first_addr);
  58         for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
  59                 if ((s = get_sbuf_line(lp)) == NULL)
  60                         return ERR;
  61                 if (isbinary)
  62                         NUL_TO_NEWLINE(s, lp->len);
  63                 if (!(regexec(pat, s, 0, NULL, 0) == isgcmd) &&
  64                     set_active_node(lp) < 0)
  65                         return ERR;
  66         }
  67         return 0;
  68 }
  69
  70
  71 /* exec_global: apply command list in the command buffer to the active
  72    lines in a range; return command status */
  73 long
  74 exec_global(int interact, int gflag)
  75 {
  76         static char *ocmd = NULL;
  77         static int ocmdsz = 0;
  78
  79         line_t *lp = NULL;
  80         int status;
  81         int n;
  82         char *cmd = NULL;
  83
  84 #ifdef BACKWARDS
  85         if (!interact)
  86                 if (!strcmp(ibufp, "\n"))
  87                         cmd = "p\n";            /* null cmd-list == `p' */
  88                 else if ((cmd = get_extended_line(&n, 0)) == NULL)
  89                         return ERR;
  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                                 errmsg = "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                                         errmsg = "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 static line_t **active_list;    /* list of lines active in a global command */
 139 static long active_last;        /* index of last active line in active_list */
 140 static long active_size;        /* size of active_list */
 141 static long active_ptr;         /* active_list index (non-decreasing) */
 142 static long 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 defined(sun) || defined(NO_REALLOC_NULL)
 153                 if (active_list != NULL) {
 154 #endif
 155                         if ((ts = (line_t **) realloc(active_list,
 156                             (ti += MINBUFSZ) * sizeof(line_t *))) == NULL) {
 157                                 fprintf(stderr, "%s\n", strerror(errno));
 158                                 errmsg = "out of memory";
 159                                 SPL0();
 160                                 return ERR;
 161                         }
 162 #if defined(sun) || defined(NO_REALLOC_NULL)
 163                 } else {
 164                         if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
 165                             sizeof(line_t **))) == NULL) {
 166                                 fprintf(stderr, "%s\n", strerror(errno));
 167                                 errmsg = "out of memory";
 168                                 SPL0();
 169                                 return ERR;
 170                         }
 171                 }
 172 #endif
 173                 active_size = ti;
 174                 active_list = ts;
 175                 SPL0();
 176         }
 177         active_list[active_last++] = lp;
 178         return 0;
 179 }
 180
 181
 182 /* unset_active_nodes: remove a range of lines from the global-active list */
 183 void
 184 unset_active_nodes(line_t *np, line_t *mp)
 185 {
 186         line_t *lp;
 187         long i;
 188
 189         for (lp = np; lp != mp; lp = lp->q_forw)
 190                 for (i = 0; i < active_last; i++)
 191                         if (active_list[active_ndx] == lp) {
 192                                 active_list[active_ndx] = NULL;
 193                                 active_ndx = INC_MOD(active_ndx, active_last - 1);
 194                                 break;
 195                         } else  active_ndx = INC_MOD(active_ndx, active_last - 1);
 196 }
 197
 198
 199 /* next_active_node: return the next global-active line node */
 200 line_t *
 201 next_active_node(void)
 202 {
 203         while (active_ptr < active_last && active_list[active_ptr] == NULL)
 204                 active_ptr++;
 205         return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
 206 }
 207
 208
 209 /* clear_active_list: clear the global-active list */
 210 void
 211 clear_active_list(void)
 212 {
 213         SPL1();
 214         active_size = active_last = active_ptr = active_ndx = 0;
 215         free(active_list);
 216         active_list = NULL;
 217         SPL0();
 218 }