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 28 #include <sys/param.h> 29 #include <errno.h> 30 #include <limits.h> 31 #include <regex.h> 32 #include <signal.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 #define ERR (-2) 39 #define EMOD (-3) 40 #define FATAL (-4) 41 42 #define MINBUFSZ 512 /* minimum buffer size - must be > 0 */ 43 #define SE_MAX 30 /* max subexpressions in a regular expression */ 44 #ifdef INT_MAX 45 # define LINECHARS INT_MAX /* max chars per line */ 46 #else 47 # define LINECHARS MAXINT /* max chars per line */ 48 #endif 49 50 /* gflags */ 51 #define GLB 001 /* global command */ 52 #define GPR 002 /* print after command */ 53 #define GLS 004 /* list after command */ 54 #define GNP 010 /* enumerate after command */ 55 #define GSG 020 /* global substitute */ 56 57 typedef regex_t pattern_t; 58 59 /* Line node */ 60 typedef struct line { 61 struct line *q_forw; 62 struct line *q_back; 63 off_t seek; /* address of line in scratch buffer */ 64 int len; /* length of line */ 65 } line_t; 66 67 68 typedef struct undo { 69 70 /* type of undo nodes */ 71 #define UADD 0 72 #define UDEL 1 73 #define UMOV 2 74 #define VMOV 3 75 76 int type; /* command type */ 77 line_t *h; /* head of list */ 78 line_t *t; /* tail of list */ 79 } undo_t; 80 81 #ifndef max 82 # define max(a,b) ((a) > (b) ? (a) : (b)) 83 #endif 84 #ifndef min 85 # define min(a,b) ((a) < (b) ? (a) : (b)) 86 #endif 87 88 #define INC_MOD(l, k) ((l) + 1 > (k) ? 0 : (l) + 1) 89 #define DEC_MOD(l, k) ((l) - 1 < 0 ? (k) : (l) - 1) 90 91 /* SPL1: disable some interrupts (requires reliable signals) */ 92 #define SPL1() mutex++ 93 94 /* SPL0: enable all interrupts; check sigflags (requires reliable signals) */ 95 #define SPL0() \ 96 if (--mutex == 0) { \ 97 if (sigflags & (1 << (SIGHUP - 1))) handle_hup(SIGHUP); \ 98 if (sigflags & (1 << (SIGINT - 1))) handle_int(SIGINT); \ 99 } 100 101 /* STRTOL: convert a string to long */ 102 #define STRTOL(i, p) { \ 103 if (((i = strtol(p, &p, 10)) == LONG_MIN || i == LONG_MAX) && \ 104 errno == ERANGE) { \ 105 errmsg = "number out of range"; \ 106 i = 0; \ 107 return ERR; \ 108 } \ 109 } 110 111 #if defined(sun) || defined(NO_REALLOC_NULL) 112 /* REALLOC: assure at least a minimum size for buffer b */ 113 #define REALLOC(b,n,i,err) \ 114 if ((i) > (n)) { \ 115 size_t ti = (n); \ 116 char *ts; \ 117 SPL1(); \ 118 if ((b) != NULL) { \ 119 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 120 fprintf(stderr, "%s\n", strerror(errno)); \ 121 errmsg = "out of memory"; \ 122 SPL0(); \ 123 return err; \ 124 } \ 125 } else { \ 126 if ((ts = (char *) malloc(ti += max((i), MINBUFSZ))) == NULL) { \ 127 fprintf(stderr, "%s\n", strerror(errno)); \ 128 errmsg = "out of memory"; \ 129 SPL0(); \ 130 return err; \ 131 } \ 132 } \ 133 (n) = ti; \ 134 (b) = ts; \ 135 SPL0(); \ 136 } 137 #else /* NO_REALLOC_NULL */ 138 /* REALLOC: assure at least a minimum size for buffer b */ 139 #define REALLOC(b,n,i,err) \ 140 if ((i) > (n)) { \ 141 size_t ti = (n); \ 142 char *ts; \ 143 SPL1(); \ 144 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 145 fprintf(stderr, "%s\n", strerror(errno)); \ 146 errmsg = "out of memory"; \ 147 SPL0(); \ 148 return err; \ 149 } \ 150 (n) = ti; \ 151 (b) = ts; \ 152 SPL0(); \ 153 } 154 #endif /* NO_REALLOC_NULL */ 155 156 /* REQUE: link pred before succ */ 157 #define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred) 158 159 /* INSQUE: insert elem in circular queue after pred */ 160 #define INSQUE(elem, pred) \ 161 { \ 162 REQUE((elem), (pred)->q_forw); \ 163 REQUE((pred), elem); \ 164 } 165 166 /* REMQUE: remove_lines elem from circular queue */ 167 #define REMQUE(elem) REQUE((elem)->q_back, (elem)->q_forw); 168 169 /* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */ 170 #define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n') 171 172 /* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */ 173 #define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0') 174 175 176 /* Local Function Declarations */ 177 void add_line_node(line_t *); 178 int append_lines(long); 179 int apply_subst_template(const char *, regmatch_t *, int, int); 180 int build_active_list(int); 181 int cbc_decode(unsigned char *, FILE *); 182 int cbc_encode(unsigned char *, int, FILE *); 183 int check_addr_range(long, long); 184 void clear_active_list(void); 185 void clear_undo_stack(void); 186 int close_sbuf(void); 187 int copy_lines(long); 188 int delete_lines(long, long); 189 int display_lines(long, long, int); 190 line_t *dup_line_node(line_t *); 191 int exec_command(void); 192 long exec_global(int, int); 193 int extract_addr_range(void); 194 char *extract_pattern(int); 195 int extract_subst_tail(int *, long *); 196 char *extract_subst_template(void); 197 int filter_lines(long, long, char *); 198 line_t *get_addressed_line_node(long); 199 pattern_t *get_compiled_pattern(void); 200 char *get_extended_line(int *, int); 201 char *get_filename(void); 202 int get_keyword(void); 203 long get_line_node_addr(line_t *); 204 long get_matching_node_addr(pattern_t *, int); 205 long get_marked_node_addr(int); 206 char *get_sbuf_line(line_t *); 207 int get_shell_command(void); 208 int get_stream_line(FILE *); 209 int get_tty_line(void); 210 void handle_hup(int); 211 void handle_int(int); 212 void handle_winch(int); 213 int has_trailing_escape(char *, char *); 214 int hex_to_binary(int, int); 215 void init_buffers(void); 216 int is_legal_filename(char *); 217 int join_lines(long, long); 218 int mark_line_node(line_t *, int); 219 int move_lines(long); 220 line_t *next_active_node(void); 221 long next_addr(void); 222 int open_sbuf(void); 223 char *parse_char_class(char *); 224 int pop_undo_stack(void); 225 undo_t *push_undo_stack(int, long, long); 226 const char *put_sbuf_line(const char *); 227 int put_stream_line(FILE *, const char *, int); 228 int put_tty_line(const char *, int, long, int); 229 void quit(int); 230 long read_file(char *, long); 231 long read_stream(FILE *, long); 232 int search_and_replace(pattern_t *, int, int); 233 int set_active_node(line_t *); 234 void signal_hup(int); 235 void signal_int(int); 236 char *strip_escapes(char *); 237 int substitute_matching_text(pattern_t *, line_t *, int, int); 238 char *translit_text(char *, int, int, int); 239 void unmark_line_node(line_t *); 240 void unset_active_nodes(line_t *, line_t *); 241 long write_file(char *, const char *, long, long); 242 long write_stream(FILE *, long, long); 243 244 /* global buffers */ 245 extern char stdinbuf[]; 246 extern char *ibuf; 247 extern char *ibufp; 248 extern int ibufsz; 249 250 /* global flags */ 251 extern int isbinary; 252 extern int isglobal; 253 extern int modified; 254 extern int mutex; 255 extern int sigflags; 256 257 /* global vars */ 258 extern long addr_last; 259 extern long current_addr; 260 extern const char *errmsg; 261 extern long first_addr; 262 extern int lineno; 263 extern long second_addr; 264 extern long u_addr_last; 265 extern long u_current_addr; 266 extern long rows; 267 extern int cols; 268 extern int newline_added; 269 extern int scripted; 270 extern int patlock; 271