1 /* ed.h: type and constant definitions for the ed editor. */ 2 /*- 3 * SPDX-License-Identifier: BSD-2-Clause 4 * 5 * Copyright (c) 1993 Andrew Moore 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/param.h> 31 #include <errno.h> 32 #include <limits.h> 33 #include <regex.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 #include <wchar.h> 40 #include <wctype.h> 41 42 #define ERR (-2) 43 #define EMOD (-3) 44 #define FATAL (-4) 45 46 #define MINBUFSZ 512 /* minimum buffer size - must be > 0 */ 47 #define SE_MAX 30 /* max subexpressions in a regular expression */ 48 #ifdef INT_MAX 49 # define LINECHARS INT_MAX /* max chars per line */ 50 #else 51 # define LINECHARS MAXINT /* max chars per line */ 52 #endif 53 54 /* gflags */ 55 #define GLB 001 /* global command */ 56 #define GPR 002 /* print after command */ 57 #define GLS 004 /* list after command */ 58 #define GNP 010 /* enumerate after command */ 59 #define GSG 020 /* global substitute */ 60 61 typedef regex_t pattern_t; 62 63 /* Line node */ 64 typedef struct line { 65 struct line *q_forw; 66 struct line *q_back; 67 off_t seek; /* address of line in scratch buffer */ 68 int len; /* length of line */ 69 } line_t; 70 71 72 typedef struct undo { 73 74 /* type of undo nodes */ 75 #define UADD 0 76 #define UDEL 1 77 #define UMOV 2 78 #define VMOV 3 79 80 int type; /* command type */ 81 line_t *h; /* head of list */ 82 line_t *t; /* tail of list */ 83 } undo_t; 84 85 #ifndef max 86 # define max(a,b) ((a) > (b) ? (a) : (b)) 87 #endif 88 #ifndef min 89 # define min(a,b) ((a) < (b) ? (a) : (b)) 90 #endif 91 92 #define INC_MOD(l, k) ((l) + 1 > (k) ? 0 : (l) + 1) 93 #define DEC_MOD(l, k) ((l) - 1 < 0 ? (k) : (l) - 1) 94 95 /* SPL1: disable some interrupts (requires reliable signals) */ 96 #define SPL1() mutex++ 97 98 /* SPL0: enable all interrupts; check sigflags (requires reliable signals) */ 99 #define SPL0() \ 100 if (--mutex == 0) { \ 101 if (sigflags & (1 << (SIGHUP - 1))) handle_hup(SIGHUP); \ 102 if (sigflags & (1 << (SIGINT - 1))) handle_int(SIGINT); \ 103 } 104 105 /* STRTOL: convert a string to long */ 106 #define STRTOL(i, p) { \ 107 if (((i = strtol(p, &p, 10)) == LONG_MIN || i == LONG_MAX) && \ 108 errno == ERANGE) { \ 109 errmsg = "number out of range"; \ 110 i = 0; \ 111 return ERR; \ 112 } \ 113 } 114 115 #if defined(sun) || defined(NO_REALLOC_NULL) 116 /* REALLOC: assure at least a minimum size for buffer b */ 117 #define REALLOC(b,n,i,err) \ 118 if ((i) > (n)) { \ 119 size_t ti = (n); \ 120 char *ts; \ 121 SPL1(); \ 122 if ((b) != NULL) { \ 123 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 124 fprintf(stderr, "%s\n", strerror(errno)); \ 125 errmsg = "out of memory"; \ 126 SPL0(); \ 127 return err; \ 128 } \ 129 } else { \ 130 if ((ts = (char *) malloc(ti += max((i), MINBUFSZ))) == NULL) { \ 131 fprintf(stderr, "%s\n", strerror(errno)); \ 132 errmsg = "out of memory"; \ 133 SPL0(); \ 134 return err; \ 135 } \ 136 } \ 137 (n) = ti; \ 138 (b) = ts; \ 139 SPL0(); \ 140 } 141 #else /* NO_REALLOC_NULL */ 142 /* REALLOC: assure at least a minimum size for buffer b */ 143 #define REALLOC(b,n,i,err) \ 144 if ((i) > (n)) { \ 145 size_t ti = (n); \ 146 char *ts; \ 147 SPL1(); \ 148 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 149 fprintf(stderr, "%s\n", strerror(errno)); \ 150 errmsg = "out of memory"; \ 151 SPL0(); \ 152 return err; \ 153 } \ 154 (n) = ti; \ 155 (b) = ts; \ 156 SPL0(); \ 157 } 158 #endif /* NO_REALLOC_NULL */ 159 160 /* REQUE: link pred before succ */ 161 #define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred) 162 163 /* INSQUE: insert elem in circular queue after pred */ 164 #define INSQUE(elem, pred) \ 165 { \ 166 REQUE((elem), (pred)->q_forw); \ 167 REQUE((pred), elem); \ 168 } 169 170 /* REMQUE: remove_lines elem from circular queue */ 171 #define REMQUE(elem) REQUE((elem)->q_back, (elem)->q_forw); 172 173 /* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */ 174 #define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n') 175 176 /* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */ 177 #define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0') 178 179 180 /* Local Function Declarations */ 181 void add_line_node(line_t *); 182 int append_lines(long); 183 int apply_subst_template(const char *, regmatch_t *, int, int); 184 int build_active_list(int); 185 int cbc_decode(unsigned char *, FILE *); 186 int cbc_encode(unsigned char *, int, FILE *); 187 int check_addr_range(long, long); 188 void clear_active_list(void); 189 void clear_undo_stack(void); 190 int close_sbuf(void); 191 int copy_lines(long); 192 int delete_lines(long, long); 193 int display_lines(long, long, int); 194 line_t *dup_line_node(line_t *); 195 int exec_command(void); 196 long exec_global(int, int); 197 int extract_addr_range(void); 198 char *extract_pattern(int); 199 int extract_subst_tail(int *, long *); 200 char *extract_subst_template(void); 201 int filter_lines(long, long, char *); 202 line_t *get_addressed_line_node(long); 203 pattern_t *get_compiled_pattern(void); 204 char *get_extended_line(int *, int); 205 char *get_filename(void); 206 int get_keyword(void); 207 long get_line_node_addr(line_t *); 208 long get_matching_node_addr(pattern_t *, int); 209 long get_marked_node_addr(int); 210 char *get_sbuf_line(line_t *); 211 int get_shell_command(void); 212 int get_stream_line(FILE *); 213 int get_tty_line(void); 214 void handle_hup(int); 215 void handle_int(int); 216 void handle_winch(int); 217 int has_trailing_escape(char *, char *); 218 int hex_to_binary(int, int); 219 void init_buffers(void); 220 int is_legal_filename(char *); 221 int join_lines(long, long); 222 int mark_line_node(line_t *, int); 223 int move_lines(long); 224 line_t *next_active_node(void); 225 long next_addr(void); 226 int open_sbuf(void); 227 char *parse_char_class(char *); 228 int pop_undo_stack(void); 229 undo_t *push_undo_stack(int, long, long); 230 const char *put_sbuf_line(const char *); 231 int put_stream_line(FILE *, const char *, int); 232 int put_tty_line(const char *, int, long, int); 233 void quit(int); 234 long read_file(char *, long); 235 long read_stream(FILE *, long); 236 int search_and_replace(pattern_t *, int, int); 237 int set_active_node(line_t *); 238 void signal_hup(int); 239 void signal_int(int); 240 char *strip_escapes(char *); 241 int substitute_matching_text(pattern_t *, line_t *, int, int); 242 char *translit_text(char *, int, int, int); 243 void unmark_line_node(line_t *); 244 void unset_active_nodes(line_t *, line_t *); 245 long write_file(char *, const char *, long, long); 246 long write_stream(FILE *, long, long); 247 248 /* global buffers */ 249 extern char stdinbuf[]; 250 extern char *ibuf; 251 extern char *ibufp; 252 extern int ibufsz; 253 254 /* global flags */ 255 extern int isbinary; 256 extern int isglobal; 257 extern int modified; 258 extern int mutex; 259 extern int sigflags; 260 261 /* global vars */ 262 extern long addr_last; 263 extern long current_addr; 264 extern const char *errmsg; 265 extern long first_addr; 266 extern int lineno; 267 extern long second_addr; 268 extern long u_addr_last; 269 extern long u_current_addr; 270 extern long rows; 271 extern int cols; 272 extern int newline_added; 273 extern int scripted; 274 extern int patlock; 275