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