bin/ed/ed.h

   1 /*      $NetBSD: ed.h,v 1.35 2011/08/29 14:51:18 joerg Exp $    */
   2
   3 /* ed.h: type and constant definitions for the ed editor. */
   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  *      @(#)ed.h,v 1.5 1994/02/01 00:34:39 alm Exp
  30  */
  31 #include <sys/types.h>
  32 #if defined(BSD) && BSD >= 199103 || defined(__386BSD__)
  33 # include <sys/param.h>         /* for MAXPATHLEN */
  34 #endif
  35 #include <errno.h>
  36 #if defined(sun) || defined(__NetBSD__) || defined(__APPLE__) || \
  37     defined(__minix)
  38 # include <limits.h>
  39 #endif
  40 #include <regex.h>
  41 #include <signal.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46
  47 #define ERR             (-2)
  48 #define EMOD            (-3)
  49 #define FATAL           (-4)
  50
  51 #ifndef MAXPATHLEN
  52 # define MAXPATHLEN 255         /* _POSIX_PATH_MAX */
  53 #endif
  54
  55 #define MINBUFSZ 512            /* minimum buffer size - must be > 0 */
  56 #define SE_MAX 30               /* max subexpressions in a regular expression */
  57 #ifdef INT_MAX
  58 # define LINECHARS INT_MAX      /* max chars per line */
  59 #else
  60 # define LINECHARS MAXINT       /* max chars per line */
  61 #endif
  62
  63 /* gflags */
  64 #define GLB 001         /* global command */
  65 #define GPR 002         /* print after command */
  66 #define GLS 004         /* list after command */
  67 #define GNP 010         /* enumerate after command */
  68 #define GSG 020         /* global substitute */
  69
  70 typedef regex_t pattern_t;
  71
  72 /* Line node */
  73 typedef struct  line {
  74         struct line     *q_forw;
  75         struct line     *q_back;
  76         off_t           seek;           /* address of line in scratch buffer */
  77         int             len;            /* length of line */
  78 } line_t;
  79
  80
  81 typedef struct undo {
  82
  83 /* type of undo nodes */
  84 #define UADD    0
  85 #define UDEL    1
  86 #define UMOV    2
  87 #define VMOV    3
  88
  89         int type;                       /* command type */
  90         line_t  *h;                     /* head of list */
  91         line_t  *t;                     /* tail of list */
  92 } undo_t;
  93
  94 #ifndef max
  95 # define max(a,b) ((a) > (b) ? (a) : (b))
  96 #endif
  97 #ifndef min
  98 # define min(a,b) ((a) < (b) ? (a) : (b))
  99 #endif
 100
 101 #define INC_MOD(l, k)   ((l) + 1 > (k) ? 0 : (l) + 1)
 102 #define DEC_MOD(l, k)   ((l) - 1 < 0 ? (k) : (l) - 1)
 103
 104 /* SPL1: disable some interrupts (requires reliable signals) */
 105 #define SPL1() mutex++
 106
 107 /* SPL0: enable all interrupts; check sigflags (requires reliable signals) */
 108 #define SPL0() \
 109 if (--mutex == 0) { \
 110         if (sigflags & (1 << (SIGHUP - 1))) handle_hup(SIGHUP); \
 111         if (sigflags & (1 << (SIGINT - 1))) handle_int(SIGINT); \
 112 }
 113
 114 /* STRTOL: convert a string to long */
 115 #define STRTOL(i, p) { \
 116         errno = 0 ; \
 117         if (((i = strtol(p, &p, 10)) == LONG_MIN || i == LONG_MAX) && \
 118             errno == ERANGE) { \
 119                 sprintf(errmsg, "number out of range"); \
 120                 i = 0; \
 121                 return ERR; \
 122         } \
 123 }
 124
 125 #if defined(sun) || defined(NO_REALLOC_NULL)
 126 /* REALLOC: assure at least a minimum size for buffer b */
 127 #define REALLOC(b,n,i,err) \
 128 if ((i) > (n)) { \
 129         int ti = (n); \
 130         char *ts; \
 131         SPL1(); \
 132         if ((b) != NULL) { \
 133                 if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \
 134                         fprintf(stderr, "%s\n", strerror(errno)); \
 135                         sprintf(errmsg, "out of memory"); \
 136                         SPL0(); \
 137                         return err; \
 138                 } \
 139         } else { \
 140                 if ((ts = (char *) malloc(ti += max((i), MINBUFSZ))) == NULL) { \
 141                         fprintf(stderr, "%s\n", strerror(errno)); \
 142                         sprintf(errmsg, "out of memory"); \
 143                         SPL0(); \
 144                         return err; \
 145                 } \
 146         } \
 147         (n) = ti; \
 148         (b) = ts; \
 149         SPL0(); \
 150 }
 151 #else /* NO_REALLOC_NULL */
 152 /* REALLOC: assure at least a minimum size for buffer b */
 153 #define REALLOC(b,n,i,err) \
 154 if ((i) > (n)) { \
 155         int ti = (n); \
 156         char *ts; \
 157         SPL1(); \
 158         if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \
 159                 fprintf(stderr, "%s\n", strerror(errno)); \
 160                 sprintf(errmsg, "out of memory"); \
 161                 SPL0(); \
 162                 return err; \
 163         } \
 164         (n) = ti; \
 165         (b) = ts; \
 166         SPL0(); \
 167 }
 168 #endif /* NO_REALLOC_NULL */
 169
 170 /* REQUE: link pred before succ */
 171 #define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred)
 172
 173 /* INSQUE: insert elem in circular queue after pred */
 174 #define INSQUE(elem, pred) \
 175 { \
 176         REQUE((elem), (pred)->q_forw); \
 177         REQUE((pred), elem); \
 178 }
 179
 180 /* remque: remove_lines elem from circular queue */
 181 #define REMQUE(elem) REQUE((elem)->q_back, (elem)->q_forw);
 182
 183 /* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */
 184 #define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n')
 185
 186 /* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */
 187 #define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0')
 188
 189 #if defined(sun) && !defined(__SVR4)
 190 # define strerror(n) sys_errlist[n]
 191 #endif
 192
 193 /* Local Function Declarations */
 194 void add_line_node(line_t *);
 195 int append_lines(long);
 196 int apply_subst_template(char *, regmatch_t *, int, int);
 197 int build_active_list(int);
 198 int check_addr_range(long, long);
 199 void clear_active_list(void);
 200 void clear_undo_stack(void);
 201 int close_sbuf(void);
 202 int copy_lines(long);
 203 int delete_lines(long, long);
 204 int display_lines(long, long, int);
 205 line_t *dup_line_node(line_t *);
 206 int exec_command(void);
 207 long exec_global(int, int);
 208 int extract_addr_range(void);
 209 char *extract_pattern(int);
 210 int extract_subst_tail(int *, long *);
 211 char *extract_subst_template(void);
 212 int filter_lines(long, long, char *);
 213 int flush_des_file(FILE *);
 214 line_t *get_addressed_line_node(long);
 215 pattern_t *get_compiled_pattern(void);
 216 int get_des_char(FILE *);
 217 char *get_extended_line(int *, int);
 218 char *get_filename(void);
 219 int get_keyword(void);
 220 long get_line_node_addr(line_t *);
 221 long get_matching_node_addr(pattern_t *, int);
 222 long get_marked_node_addr(int);
 223 char *get_sbuf_line(line_t *);
 224 int get_shell_command(void);
 225 int get_stream_line(FILE *);
 226 int get_tty_line(void);
 227 __dead void handle_hup(int);
 228 __dead void handle_int(int);
 229 void handle_winch(int);
 230 int has_trailing_escape(char *, char *);
 231 void init_buffers(void);
 232 void init_des_cipher(void);
 233 int is_legal_filename(char *);
 234 int join_lines(long, long);
 235 int mark_line_node(line_t *, int);
 236 int move_lines(long);
 237 line_t *next_active_node(void);
 238 long next_addr(void);
 239 int open_sbuf(void);
 240 char *parse_char_class(char *);
 241 int pop_undo_stack(void);
 242 undo_t *push_undo_stack(int, long, long);
 243 int put_des_char(int, FILE *);
 244 char *put_sbuf_line(char *);
 245 int put_stream_line(FILE *, char *, int);
 246 int put_tty_line(char *, int, long, int);
 247 __dead void quit(int);
 248 long read_file(char *, long);
 249 long read_stream(FILE *, long);
 250 int search_and_replace(pattern_t *, int, int);
 251 int set_active_node(line_t *);
 252 void signal_hup(int);
 253 void signal_int(int);
 254 char *strip_escapes(const char *);
 255 int substitute_matching_text(pattern_t *, line_t *, int, int);
 256 char *translit_text(char *, int, int, int);
 257 void unmark_line_node(line_t *);
 258 void unset_active_nodes(line_t *, line_t *);
 259 long write_file(const char *, const char *, long, long);
 260 long write_stream(FILE *, long, long);
 261
 262 /* global buffers */
 263 extern char stdinbuf[];
 264 extern char *ibuf;
 265 extern char *ibufp;
 266 extern int ibufsz;
 267
 268 /* global flags */
 269 extern int isbinary;
 270 extern int isglobal;
 271 extern int modified;
 272 extern int mutex;
 273 extern int sigflags;
 274
 275 /* global vars */
 276 extern long addr_last;
 277 extern long current_addr;
 278 extern long first_addr;
 279 extern int lineno;
 280 extern long second_addr;
 281 extern long rows;
 282 extern int cols;
 283 extern int scripted;
 284 extern int ere;
 285 extern int des;
 286 extern int newline_added;       /* io.c */
 287 extern int patlock;
 288 extern char errmsg[];           /* re.c */
 289 extern long u_current_addr;     /* undo.c */
 290 extern long u_addr_last;        /* undo.c */
 291 #if defined(sun) && !defined(__SVR4)
 292 extern char *sys_errlist[];
 293 #endif