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