contrib/nvi2/common/cut.h

   1 /*-
   2  * Copyright (c) 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1991, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  *
   9  *      $Id: cut.h,v 10.10 2012/02/11 15:52:33 zy Exp $
  10  */
  11
  12 typedef struct _texth TEXTH;            /* TEXT list head structure. */
  13 TAILQ_HEAD(_texth, _text);
  14
  15 /* Cut buffers. */
  16 struct _cb {
  17         SLIST_ENTRY(_cb) q;             /* Linked list of cut buffers. */
  18         TEXTH    textq[1];              /* Linked list of TEXT structures. */
  19         /* XXXX Needed ? Can non ascii-chars be cut buffer names ? */
  20         CHAR_T   name;                  /* Cut buffer name. */
  21         size_t   len;                   /* Total length of cut text. */
  22
  23 #define CB_LMODE        0x01            /* Cut was in line mode. */
  24         u_int8_t flags;
  25 };
  26
  27 /* Lines/blocks of text. */
  28 struct _text {                          /* Text: a linked list of lines. */
  29         TAILQ_ENTRY(_text) q;           /* Linked list of text structures. */
  30         CHAR_T  *lb;                    /* Line buffer. */
  31         size_t   lb_len;                /* Line buffer length. */
  32         size_t   len;                   /* Line length. */
  33
  34         /* These fields are used by the vi text input routine. */
  35         recno_t  lno;                   /* 1-N: file line. */
  36
  37 #define ENTIRE_LINE     ((size_t)-1)    /* cno: end of the line. */
  38         size_t   cno;                   /* 0-N: file character in line. */
  39         size_t   ai;                    /* 0-N: autoindent bytes. */
  40         size_t   insert;                /* 0-N: bytes to insert (push). */
  41         size_t   offset;                /* 0-N: initial, unerasable chars. */
  42         size_t   owrite;                /* 0-N: chars to overwrite. */
  43         size_t   R_erase;               /* 0-N: 'R' erase count. */
  44         size_t   sv_cno;                /* 0-N: Saved line cursor. */
  45         size_t   sv_len;                /* 0-N: Saved line length. */
  46
  47         /*
  48          * These fields returns information from the vi text input routine.
  49          *
  50          * The termination condition.  Note, this field is only valid if the
  51          * text input routine returns success.
  52          *      TERM_BS:        User backspaced over the prompt.
  53          *      TERM_CEDIT:     User entered <edit-char>.
  54          *      TERM_CR:        User entered <carriage-return>; no data.
  55          *      TERM_ESC:       User entered <escape>; no data.
  56          *      TERM_OK:        Data available.
  57          *      TERM_SEARCH:    Incremental search.
  58          */
  59         enum {
  60             TERM_BS, TERM_CEDIT, TERM_CR, TERM_ESC, TERM_OK, TERM_SEARCH
  61         } term;
  62 };
  63
  64 /*
  65  * Get named buffer 'name'.
  66  * Translate upper-case buffer names to lower-case buffer names.
  67  */
  68 #define CBNAME(sp, cbp, nch) {                                          \
  69         CHAR_T L__name;                                                 \
  70         L__name = isupper(nch) ? tolower(nch) : (nch);                  \
  71         SLIST_FOREACH(cbp, sp->gp->cutq, q)                             \
  72                 if (cbp->name == L__name)                               \
  73                         break;                                          \
  74 }
  75
  76 /* Flags to the cut() routine. */
  77 #define CUT_LINEMODE    0x01            /* Cut in line mode. */
  78 #define CUT_NUMOPT      0x02            /* Numeric buffer: optional. */
  79 #define CUT_NUMREQ      0x04            /* Numeric buffer: required. */