1 /* ed.h: type and constant definitions for the ed editor. */ 2 /*- 3 * Copyright (c) 1993 Andrew Moore 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * @(#)ed.h,v 1.5 1994/02/01 00:34:39 alm Exp 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <errno.h> 33 #include <limits.h> 34 #include <regex.h> 35 #include <signal.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #define ERR (-2) 42 #define EMOD (-3) 43 #define FATAL (-4) 44 45 #define MINBUFSZ 512 /* minimum buffer size - must be > 0 */ 46 #define SE_MAX 30 /* max subexpressions in a regular expression */ 47 #ifdef INT_MAX 48 # define LINECHARS INT_MAX /* max chars per line */ 49 #else 50 # define LINECHARS MAXINT /* max chars per line */ 51 #endif 52 53 /* gflags */ 54 #define GLB 001 /* global command */ 55 #define GPR 002 /* print after command */ 56 #define GLS 004 /* list after command */ 57 #define GNP 010 /* enumerate after command */ 58 #define GSG 020 /* global substitute */ 59 60 typedef regex_t pattern_t; 61 62 /* Line node */ 63 typedef struct line { 64 struct line *q_forw; 65 struct line *q_back; 66 off_t seek; /* address of line in scratch buffer */ 67 int len; /* length of line */ 68 } line_t; 69 70 71 typedef struct undo { 72 73 /* type of undo nodes */ 74 #define UADD 0 75 #define UDEL 1 76 #define UMOV 2 77 #define VMOV 3 78 79 int type; /* command type */ 80 line_t *h; /* head of list */ 81 line_t *t; /* tail of list */ 82 } undo_t; 83 84 #ifndef max 85 # define max(a,b) ((a) > (b) ? (a) : (b)) 86 #endif 87 #ifndef min 88 # define min(a,b) ((a) < (b) ? (a) : (b)) 89 #endif 90 91 #define INC_MOD(l, k) ((l) + 1 > (k) ? 0 : (l) + 1) 92 #define DEC_MOD(l, k) ((l) - 1 < 0 ? (k) : (l) - 1) 93 94 /* SPL1: disable some interrupts (requires reliable signals) */ 95 #define SPL1() mutex++ 96 97 /* SPL0: enable all interrupts; check sigflags (requires reliable signals) */ 98 #define SPL0() \ 99 if (--mutex == 0) { \ 100 if (sigflags & (1 << (SIGHUP - 1))) handle_hup(SIGHUP); \ 101 if (sigflags & (1 << (SIGINT - 1))) handle_int(SIGINT); \ 102 } 103 104 /* STRTOL: convert a string to long */ 105 #define STRTOL(i, p) { \ 106 if (((i = strtol(p, &p, 10)) == LONG_MIN || i == LONG_MAX) && \ 107 errno == ERANGE) { \ 108 errmsg = "number out of range"; \ 109 i = 0; \ 110 return ERR; \ 111 } \ 112 } 113 114 #if defined(sun) || defined(NO_REALLOC_NULL) 115 /* REALLOC: assure at least a minimum size for buffer b */ 116 #define REALLOC(b,n,i,err) \ 117 if ((i) > (n)) { \ 118 size_t ti = (n); \ 119 char *ts; \ 120 SPL1(); \ 121 if ((b) != NULL) { \ 122 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 123 fprintf(stderr, "%s\n", strerror(errno)); \ 124 errmsg = "out of memory"; \ 125 SPL0(); \ 126 return err; \ 127 } \ 128 } else { \ 129 if ((ts = (char *) malloc(ti += max((i), MINBUFSZ))) == NULL) { \ 130 fprintf(stderr, "%s\n", strerror(errno)); \ 131 errmsg = "out of memory"; \ 132 SPL0(); \ 133 return err; \ 134 } \ 135 } \ 136 (n) = ti; \ 137 (b) = ts; \ 138 SPL0(); \ 139 } 140 #else /* NO_REALLOC_NULL */ 141 /* REALLOC: assure at least a minimum size for buffer b */ 142 #define REALLOC(b,n,i,err) \ 143 if ((i) > (n)) { \ 144 size_t ti = (n); \ 145 char *ts; \ 146 SPL1(); \ 147 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 148 fprintf(stderr, "%s\n", strerror(errno)); \ 149 errmsg = "out of memory"; \ 150 SPL0(); \ 151 return err; \ 152 } \ 153 (n) = ti; \ 154 (b) = ts; \ 155 SPL0(); \ 156 } 157 #endif /* NO_REALLOC_NULL */ 158 159 /* REQUE: link pred before succ */ 160 #define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred) 161 162 /* INSQUE: insert elem in circular queue after pred */ 163 #define INSQUE(elem, pred) \ 164 { \ 165 REQUE((elem), (pred)->q_forw); \ 166 REQUE((pred), elem); \ 167 } 168 169 /* REMQUE: remove_lines elem from circular queue */ 170 #define REMQUE(elem) REQUE((elem)->q_back, (elem)->q_forw); 171 172 /* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */ 173 #define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n') 174 175 /* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */ 176 #define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0') 177 178 179 /* Local Function Declarations */ 180 void add_line_node(line_t *); 181 int append_lines(long); 182 int apply_subst_template(const char *, regmatch_t *, int, int); 183 int build_active_list(int); 184 int cbc_decode(unsigned char *, FILE *); 185 int cbc_encode(unsigned char *, int, FILE *); 186 int check_addr_range(long, long); 187 void clear_active_list(void); 188 void clear_undo_stack(void); 189 int close_sbuf(void); 190 int copy_lines(long); 191 int delete_lines(long, long); 192 int display_lines(long, long, int); 193 line_t *dup_line_node(line_t *); 194 int exec_command(void); 195 long exec_global(int, int); 196 int extract_addr_range(void); 197 char *extract_pattern(int); 198 int extract_subst_tail(int *, long *); 199 char *extract_subst_template(void); 200 int filter_lines(long, long, char *); 201 line_t *get_addressed_line_node(long); 202 pattern_t *get_compiled_pattern(void); 203 char *get_extended_line(int *, int); 204 char *get_filename(void); 205 int get_keyword(void); 206 long get_line_node_addr(line_t *); 207 long get_matching_node_addr(pattern_t *, int); 208 long get_marked_node_addr(int); 209 char *get_sbuf_line(line_t *); 210 int get_shell_command(void); 211 int get_stream_line(FILE *); 212 int get_tty_line(void); 213 void handle_hup(int); 214 void handle_int(int); 215 void handle_winch(int); 216 int has_trailing_escape(char *, char *); 217 int hex_to_binary(int, int); 218 void init_buffers(void); 219 int is_legal_filename(char *); 220 int join_lines(long, long); 221 int mark_line_node(line_t *, int); 222 int move_lines(long); 223 line_t *next_active_node(void); 224 long next_addr(void); 225 int open_sbuf(void); 226 char *parse_char_class(char *); 227 int pop_undo_stack(void); 228 undo_t *push_undo_stack(int, long, long); 229 const char *put_sbuf_line(const char *); 230 int put_stream_line(FILE *, const char *, int); 231 int put_tty_line(const char *, int, long, int); 232 void quit(int); 233 long read_file(char *, long); 234 long read_stream(FILE *, long); 235 int search_and_replace(pattern_t *, int, int); 236 int set_active_node(line_t *); 237 void signal_hup(int); 238 void signal_int(int); 239 char *strip_escapes(char *); 240 int substitute_matching_text(pattern_t *, line_t *, int, int); 241 char *translit_text(char *, int, int, int); 242 void unmark_line_node(line_t *); 243 void unset_active_nodes(line_t *, line_t *); 244 long write_file(char *, const char *, long, long); 245 long write_stream(FILE *, long, long); 246 247 /* global buffers */ 248 extern char stdinbuf[]; 249 extern char *ibuf; 250 extern char *ibufp; 251 extern int ibufsz; 252 253 /* global flags */ 254 extern int isbinary; 255 extern int isglobal; 256 extern int modified; 257 extern int mutex; 258 extern int sigflags; 259 260 /* global vars */ 261 extern long addr_last; 262 extern long current_addr; 263 extern const char *errmsg; 264 extern long first_addr; 265 extern int lineno; 266 extern long second_addr; 267 extern long u_addr_last; 268 extern long u_current_addr; 269 extern long rows; 270 extern int cols; 271 extern int newline_added; 272 extern int scripted; 273 extern int patlock; 274