bin/ed/ed.h

   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: head/bin/ed/ed.h 241737 2012-10-19 14:49:42Z ed $
  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         int 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         int 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 #ifdef ED_DES_INCLUDES
 179 void des_error(const char *);
 180 void expand_des_key(char *, char *);
 181 void set_des_key(DES_cblock *);
 182 #endif
 183
 184 /* Other DES support stuff */
 185 void init_des_cipher(void);
 186 int flush_des_file(FILE *);
 187 int get_des_char(FILE *);
 188 int put_des_char(int, FILE *);
 189
 190 /* Local Function Declarations */
 191 void add_line_node(line_t *);
 192 int append_lines(long);
 193 int apply_subst_template(const char *, regmatch_t *, int, int);
 194 int build_active_list(int);
 195 int cbc_decode(unsigned char *, FILE *);
 196 int cbc_encode(unsigned char *, int, FILE *);
 197 int check_addr_range(long, long);
 198 void clear_active_list(void);
 199 void clear_undo_stack(void);
 200 int close_sbuf(void);
 201 int copy_lines(long);
 202 int delete_lines(long, long);
 203 int display_lines(long, long, int);
 204 line_t *dup_line_node(line_t *);
 205 int exec_command(void);
 206 long exec_global(int, int);
 207 int extract_addr_range(void);
 208 char *extract_pattern(int);
 209 int extract_subst_tail(int *, long *);
 210 char *extract_subst_template(void);
 211 int filter_lines(long, long, char *);
 212 line_t *get_addressed_line_node(long);
 213 pattern_t *get_compiled_pattern(void);
 214 char *get_extended_line(int *, int);
 215 char *get_filename(void);
 216 int get_keyword(void);
 217 long get_line_node_addr(line_t *);
 218 long get_matching_node_addr(pattern_t *, int);
 219 long get_marked_node_addr(int);
 220 char *get_sbuf_line(line_t *);
 221 int get_shell_command(void);
 222 int get_stream_line(FILE *);
 223 int get_tty_line(void);
 224 void handle_hup(int);
 225 void handle_int(int);
 226 void handle_winch(int);
 227 int has_trailing_escape(char *, char *);
 228 int hex_to_binary(int, int);
 229 void init_buffers(void);
 230 int is_legal_filename(char *);
 231 int join_lines(long, long);
 232 int mark_line_node(line_t *, int);
 233 int move_lines(long);
 234 line_t *next_active_node(void);
 235 long next_addr(void);
 236 int open_sbuf(void);
 237 char *parse_char_class(char *);
 238 int pop_undo_stack(void);
 239 undo_t *push_undo_stack(int, long, long);
 240 const char *put_sbuf_line(const char *);
 241 int put_stream_line(FILE *, const char *, int);
 242 int put_tty_line(const char *, int, long, int);
 243 void quit(int);
 244 long read_file(char *, long);
 245 long read_stream(FILE *, long);
 246 int search_and_replace(pattern_t *, int, int);
 247 int set_active_node(line_t *);
 248 void signal_hup(int);
 249 void signal_int(int);
 250 char *strip_escapes(char *);
 251 int substitute_matching_text(pattern_t *, line_t *, int, int);
 252 char *translit_text(char *, int, int, int);
 253 void unmark_line_node(line_t *);
 254 void unset_active_nodes(line_t *, line_t *);
 255 long write_file(char *, const char *, long, long);
 256 long write_stream(FILE *, long, long);
 257
 258 /* global buffers */
 259 extern char stdinbuf[];
 260 extern char *ibuf;
 261 extern char *ibufp;
 262 extern int ibufsz;
 263
 264 /* global flags */
 265 extern int isbinary;
 266 extern int isglobal;
 267 extern int modified;
 268 extern int mutex;
 269 extern int sigflags;
 270
 271 /* global vars */
 272 extern long addr_last;
 273 extern long current_addr;
 274 extern const char *errmsg;
 275 extern long first_addr;
 276 extern int lineno;
 277 extern long second_addr;
 278 extern long u_addr_last;
 279 extern long u_current_addr;
 280 extern long rows;
 281 extern int cols;
 282 extern int newline_added;
 283 extern int des;
 284 extern int scripted;
 285 extern int patlock;