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 #ifndef lint 30 #if 0 31 static char * const rcsid = "@(#)glob.c,v 1.1 1994/02/01 00:34:40 alm Exp"; 32 #else 33 static char * const rcsid = 34 "$FreeBSD$"; 35 #endif 36 #endif /* not lint */ 37 38 #include <sys/ioctl.h> 39 #include <sys/wait.h> 40 41 #include "ed.h" 42 43 44 /* build_active_list: add line matching a pattern to the global-active list */ 45 int 46 build_active_list(isgcmd) 47 int isgcmd; 48 { 49 pattern_t *pat; 50 line_t *lp; 51 long n; 52 char *s; 53 char delimiter; 54 55 if ((delimiter = *ibufp) == ' ' || delimiter == '\n') { 56 sprintf(errmsg, "invalid pattern delimiter"); 57 return ERR; 58 } else if ((pat = get_compiled_pattern()) == NULL) 59 return ERR; 60 else if (*ibufp == delimiter) 61 ibufp++; 62 clear_active_list(); 63 lp = get_addressed_line_node(first_addr); 64 for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) { 65 if ((s = get_sbuf_line(lp)) == NULL) 66 return ERR; 67 if (isbinary) 68 NUL_TO_NEWLINE(s, lp->len); 69 if (!regexec(pat, s, 0, NULL, 0) == isgcmd && 70 set_active_node(lp) < 0) 71 return ERR; 72 } 73 return 0; 74 } 75 76 77 /* exec_global: apply command list in the command buffer to the active 78 lines in a range; return command status */ 79 long 80 exec_global(interact, gflag) 81 int interact; 82 int gflag; 83 { 84 static char *ocmd = NULL; 85 static int ocmdsz = 0; 86 87 line_t *lp = NULL; 88 int status; 89 int n; 90 char *cmd = NULL; 91 92 #ifdef BACKWARDS 93 if (!interact) 94 if (!strcmp(ibufp, "\n")) 95 cmd = "p\n"; /* null cmd-list == `p' */ 96 else if ((cmd = get_extended_line(&n, 0)) == NULL) 97 return ERR; 98 #else 99 if (!interact && (cmd = get_extended_line(&n, 0)) == NULL) 100 return ERR; 101 #endif 102 clear_undo_stack(); 103 while ((lp = next_active_node()) != NULL) { 104 if ((current_addr = get_line_node_addr(lp)) < 0) 105 return ERR; 106 if (interact) { 107 /* print current_addr; get a command in global syntax */ 108 if (display_lines(current_addr, current_addr, gflag) < 0) 109 return ERR; 110 while ((n = get_tty_line()) > 0 && 111 ibuf[n - 1] != '\n') 112 clearerr(stdin); 113 if (n < 0) 114 return ERR; 115 else if (n == 0) { 116 sprintf(errmsg, "unexpected end-of-file"); 117 return ERR; 118 } else if (n == 1 && !strcmp(ibuf, "\n")) 119 continue; 120 else if (n == 2 && !strcmp(ibuf, "&\n")) { 121 if (cmd == NULL) { 122 sprintf(errmsg, "no previous command"); 123 return ERR; 124 } else cmd = ocmd; 125 } else if ((cmd = get_extended_line(&n, 0)) == NULL) 126 return ERR; 127 else { 128 REALLOC(ocmd, ocmdsz, n + 1, ERR); 129 memcpy(ocmd, cmd, n + 1); 130 cmd = ocmd; 131 } 132 133 } 134 ibufp = cmd; 135 for (; *ibufp;) 136 if ((status = extract_addr_range()) < 0 || 137 (status = exec_command()) < 0 || 138 (status > 0 && (status = display_lines( 139 current_addr, current_addr, status)) < 0)) 140 return status; 141 } 142 return 0; 143 } 144 145 146 line_t **active_list; /* list of lines active in a global command */ 147 long active_last; /* index of last active line in active_list */ 148 long active_size; /* size of active_list */ 149 long active_ptr; /* active_list index (non-decreasing) */ 150 long active_ndx; /* active_list index (modulo active_last) */ 151 152 /* set_active_node: add a line node to the global-active list */ 153 int 154 set_active_node(lp) 155 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 sprintf(errmsg, "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 sprintf(errmsg, "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(np, mp) 194 line_t *np, *mp; 195 { 196 line_t *lp; 197 long i; 198 199 for (lp = np; lp != mp; lp = lp->q_forw) 200 for (i = 0; i < active_last; i++) 201 if (active_list[active_ndx] == lp) { 202 active_list[active_ndx] = NULL; 203 active_ndx = INC_MOD(active_ndx, active_last - 1); 204 break; 205 } else active_ndx = INC_MOD(active_ndx, active_last - 1); 206 } 207 208 209 /* next_active_node: return the next global-active line node */ 210 line_t * 211 next_active_node() 212 { 213 while (active_ptr < active_last && active_list[active_ptr] == NULL) 214 active_ptr++; 215 return (active_ptr < active_last) ? active_list[active_ptr++] : NULL; 216 } 217 218 219 /* clear_active_list: clear the global-active list */ 220 void 221 clear_active_list() 222 { 223 SPL1(); 224 active_size = active_last = active_ptr = active_ndx = 0; 225 free(active_list); 226 active_list = NULL; 227 SPL0(); 228 } 229