contrib/nvi/ex/ex.h

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  *
   9  *      @(#)ex.h        10.24 (Berkeley) 8/12/96
  10  */
  11
  12 #define PROMPTCHAR      ':'             /* Prompt using a colon. */
  13
  14 typedef struct _excmdlist {             /* Ex command table structure. */
  15         char *name;                     /* Command name, underlying function. */
  16         int (*fn) __P((SCR *, EXCMD *));
  17
  18 #define E_ADDR1         0x00000001      /* One address. */
  19 #define E_ADDR2         0x00000002      /* Two addresses. */
  20 #define E_ADDR2_ALL     0x00000004      /* Zero/two addresses; zero == all. */
  21 #define E_ADDR2_NONE    0x00000008      /* Zero/two addresses; zero == none. */
  22 #define E_ADDR_ZERO     0x00000010      /* 0 is a legal addr1. */
  23 #define E_ADDR_ZERODEF  0x00000020      /* 0 is default addr1 of empty files. */
  24 #define E_AUTOPRINT     0x00000040      /* Command always sets autoprint. */
  25 #define E_CLRFLAG       0x00000080      /* Clear the print (#, l, p) flags. */
  26 #define E_NEWSCREEN     0x00000100      /* Create a new screen. */
  27 #define E_SECURE        0x00000200      /* Permission denied if O_SECURE set. */
  28 #define E_VIONLY        0x00000400      /* Meaningful only in vi. */
  29 #define __INUSE1        0xfffff800      /* Same name space as EX_PRIVATE. */
  30         u_int16_t flags;
  31
  32         char *syntax;                   /* Syntax script. */
  33         char *usage;                    /* Usage line. */
  34         char *help;                     /* Help line. */
  35 } EXCMDLIST;
  36
  37 #define MAXCMDNAMELEN   12              /* Longest command name. */
  38 extern EXCMDLIST const cmds[];          /* Table of ex commands. */
  39
  40 /*
  41  * !!!
  42  * QUOTING NOTE:
  43  *
  44  * Historically, .exrc files and EXINIT variables could only use ^V as an
  45  * escape character, neither ^Q or a user specified character worked.  We
  46  * enforce that here, just in case someone depends on it.
  47  */
  48 #define IS_ESCAPE(sp, cmdp, ch)                                         \
  49         (F_ISSET(cmdp, E_VLITONLY) ?                                    \
  50             (ch) == CH_LITERAL : KEY_VAL(sp, ch) == K_VLNEXT)
  51
  52 /*
  53  * File state must be checked for each command -- any ex command may be entered
  54  * at any time, and most of them won't work well if a file hasn't yet been read
  55  * in.  Historic vi generally took the easy way out and dropped core.
  56  */
  57 #define NEEDFILE(sp, cmdp) {                                            \
  58         if ((sp)->ep == NULL) {                                         \
  59                 ex_emsg(sp, (cmdp)->cmd->name, EXM_NOFILEYET);          \
  60                 return (1);                                             \
  61         }                                                               \
  62 }
  63
  64 /* Range structures for global and @ commands. */
  65 typedef struct _range RANGE;
  66 struct _range {                         /* Global command range. */
  67         CIRCLEQ_ENTRY(_range) q;        /* Linked list of ranges. */
  68         recno_t start, stop;            /* Start/stop of the range. */
  69 };
  70
  71 /* Ex command structure. */
  72 struct _excmd {
  73         LIST_ENTRY(_excmd) q;           /* Linked list of commands. */
  74
  75         char     *if_name;              /* Associated file. */
  76         recno_t   if_lno;               /* Associated line number. */
  77
  78         /* Clear the structure for the ex parser. */
  79 #define CLEAR_EX_PARSER(cmdp)                                           \
  80         memset(&((cmdp)->cp), 0, ((char *)&(cmdp)->flags -              \
  81             (char *)&((cmdp)->cp)) + sizeof((cmdp)->flags))
  82
  83         char     *cp;                   /* Current command text. */
  84         size_t    clen;                 /* Current command length. */
  85
  86         char     *save_cmd;             /* Remaining command. */
  87         size_t    save_cmdlen;          /* Remaining command length. */
  88
  89         EXCMDLIST const *cmd;           /* Command: entry in command table. */
  90         EXCMDLIST rcmd;                 /* Command: table entry/replacement. */
  91
  92         CIRCLEQ_HEAD(_rh, _range) rq;   /* @/global range: linked list. */
  93         recno_t   range_lno;            /* @/global range: set line number. */
  94         char     *o_cp;                 /* Original @/global command. */
  95         size_t    o_clen;               /* Original @/global command length. */
  96 #define AGV_AT          0x01            /* @ buffer execution. */
  97 #define AGV_AT_NORANGE  0x02            /* @ buffer execution without range. */
  98 #define AGV_GLOBAL      0x04            /* global command. */
  99 #define AGV_V           0x08            /* v command. */
 100 #define AGV_ALL         (AGV_AT | AGV_AT_NORANGE | AGV_GLOBAL | AGV_V)
 101         u_int8_t  agv_flags;
 102
 103         /* Clear the structure before each ex command. */
 104 #define CLEAR_EX_CMD(cmdp) {                                            \
 105         u_int32_t L__f = F_ISSET(cmdp, E_PRESERVE);                     \
 106         memset(&((cmdp)->buffer), 0, ((char *)&(cmdp)->flags -          \
 107             (char *)&((cmdp)->buffer)) + sizeof((cmdp)->flags));        \
 108         F_SET(cmdp, L__f);                                              \
 109 }
 110
 111         CHAR_T    buffer;               /* Command: named buffer. */
 112         recno_t   lineno;               /* Command: line number. */
 113         long      count;                /* Command: signed count. */
 114         long      flagoff;              /* Command: signed flag offset. */
 115         int       addrcnt;              /* Command: addresses (0, 1 or 2). */
 116         MARK      addr1;                /* Command: 1st address. */
 117         MARK      addr2;                /* Command: 2nd address. */
 118         ARGS    **argv;                 /* Command: array of arguments. */
 119         int       argc;                 /* Command: count of arguments. */
 120
 121 #define E_C_BUFFER      0x00001         /* Buffer name specified. */
 122 #define E_C_CARAT       0x00002         /*  ^ flag. */
 123 #define E_C_COUNT       0x00004         /* Count specified. */
 124 #define E_C_COUNT_NEG   0x00008         /* Count was signed negative. */
 125 #define E_C_COUNT_POS   0x00010         /* Count was signed positive. */
 126 #define E_C_DASH        0x00020         /*  - flag. */
 127 #define E_C_DOT         0x00040         /*  . flag. */
 128 #define E_C_EQUAL       0x00080         /*  = flag. */
 129 #define E_C_FORCE       0x00100         /*  ! flag. */
 130 #define E_C_HASH        0x00200         /*  # flag. */
 131 #define E_C_LIST        0x00400         /*  l flag. */
 132 #define E_C_PLUS        0x00800         /*  + flag. */
 133 #define E_C_PRINT       0x01000         /*  p flag. */
 134         u_int16_t iflags;               /* User input information. */
 135
 136 #define __INUSE2        0x000004ff      /* Same name space as EXCMDLIST. */
 137 #define E_BLIGNORE      0x00000800      /* Ignore blank lines. */
 138 #define E_NAMEDISCARD   0x00001000      /* Free/discard the name. */
 139 #define E_NOAUTO        0x00002000      /* Don't do autoprint output. */
 140 #define E_NOPRDEF       0x00004000      /* Don't print as default. */
 141 #define E_NRSEP         0x00008000      /* Need to line adjust ex output. */
 142 #define E_OPTNUM        0x00010000      /* Number edit option affected. */
 143 #define E_VLITONLY      0x00020000      /* Use ^V quoting only. */
 144 #define E_PRESERVE      0x0003f800      /* Bits to preserve across commands. */
 145
 146 #define E_ABSMARK       0x00040000      /* Set the absolute mark. */
 147 #define E_ADDR_DEF      0x00080000      /* Default addresses used. */
 148 #define E_DELTA         0x00100000      /* Search address with delta. */
 149 #define E_MODIFY        0x00200000      /* File name expansion modified arg. */
 150 #define E_MOVETOEND     0x00400000      /* Move to the end of the file first. */
 151 #define E_NEWLINE       0x00800000      /* Found ending <newline>. */
 152 #define E_SEARCH_WMSG   0x01000000      /* Display search-wrapped message. */
 153 #define E_USELASTCMD    0x02000000      /* Use the last command. */
 154 #define E_VISEARCH      0x04000000      /* It's really a vi search command. */
 155 #ifdef GTAGS
 156 #define E_REFERENCE     0x08000000      /* locate function references */
 157 #endif
 158         u_int32_t flags;                /* Current flags. */
 159 };
 160
 161 /* Ex private, per-screen memory. */
 162 typedef struct _ex_private {
 163         CIRCLEQ_HEAD(_tqh, _tagq) tq;   /* Tag queue. */
 164         TAILQ_HEAD(_tagfh, _tagf) tagfq;/* Tag file list. */
 165         LIST_HEAD(_csch, _csc) cscq;    /* Cscope connection list. */
 166         char    *tag_last;              /* Saved last tag string. */
 167
 168         CHAR_T  *lastbcomm;             /* Last bang command. */
 169
 170         ARGS   **args;                  /* Command: argument list. */
 171         int      argscnt;               /* Command: argument list count. */
 172         int      argsoff;               /* Command: offset into arguments. */
 173
 174         u_int32_t fdef;                 /* Saved E_C_* default command flags. */
 175
 176         char    *ibp;                   /* File line input buffer. */
 177         size_t   ibp_len;               /* File line input buffer length. */
 178
 179         /*
 180          * Buffers for the ex output.  The screen/vi support doesn't do any
 181          * character buffering of any kind.  We do it here so that we're not
 182          * calling the screen output routines on every character.
 183          *
 184          * XXX
 185          * Change to grow dynamically.
 186          */
 187         char     obp[1024];             /* Ex output buffer. */
 188         size_t   obp_len;               /* Ex output buffer length. */
 189
 190 #define EXP_CSCINIT     0x01            /* Cscope initialized. */
 191         u_int8_t flags;
 192 } EX_PRIVATE;
 193 #define EXP(sp) ((EX_PRIVATE *)((sp)->ex_private))
 194
 195 /*
 196  * Filter actions:
 197  *
 198  *      FILTER_BANG     !:      filter text through the utility.
 199  *      FILTER_RBANG    !:      read from the utility (without stdin).
 200  *      FILTER_READ     read:   read from the utility (with stdin).
 201  *      FILTER_WRITE    write:  write to the utility, display its output.
 202  */
 203 enum filtertype { FILTER_BANG, FILTER_RBANG, FILTER_READ, FILTER_WRITE };
 204
 205 /* Ex common error messages. */
 206 typedef enum {
 207         EXM_EMPTYBUF,                   /* Empty buffer. */
 208         EXM_FILECOUNT,                  /* Too many file names. */
 209         EXM_NOCANON,                    /* No terminal interface. */
 210         EXM_NOCANON_F,                  /* EXM_NOCANO: filter version. */
 211         EXM_NOFILEYET,                  /* Illegal until a file read in. */
 212         EXM_NOPREVBUF,                  /* No previous buffer specified. */
 213         EXM_NOPREVRE,                   /* No previous RE specified. */
 214         EXM_NOSUSPEND,                  /* No suspension. */
 215         EXM_SECURE,                     /* Illegal if secure edit option set. */
 216         EXM_SECURE_F,                   /* EXM_SECURE: filter version */
 217         EXM_USAGE                       /* Standard usage message. */
 218 } exm_t;
 219
 220 /* Ex address error types. */
 221 enum badaddr { A_COMBO, A_EMPTY, A_EOF, A_NOTSET, A_ZERO };
 222
 223 /* Ex common tag error messages. */
 224 typedef enum {
 225         TAG_BADLNO,             /* Tag line doesn't exist. */
 226         TAG_EMPTY,              /* Tags stack is empty. */
 227         TAG_SEARCH              /* Tags search pattern wasn't found. */
 228 } tagmsg_t;
 229
 230 #include "ex_def.h"
 231 #include "ex_extern.h"