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 line_t **active_list; /* list of lines active in a global command */ 139 long active_last; /* index of last active line in active_list */ 140 long active_size; /* size of active_list */ 141 long active_ptr; /* active_list index (non-decreasing) */ 142 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 } 219