contrib/nvi/ip/ip.h

   1 /*-
   2  * Copyright (c) 1996
   3  *      Keith Bostic.  All rights reserved.
   4  *
   5  * See the LICENSE file for redistribution information.
   6  *
   7  *      @(#)ip.h        8.3 (Berkeley) 10/13/96
   8  */
   9
  10 typedef struct _ip_private {
  11         int      i_fd;          /* Input file descriptor. */
  12         int      o_fd;          /* Output file descriptor. */
  13
  14         size_t   row;           /* Current row. */
  15         size_t   col;           /* Current column. */
  16
  17         size_t   iblen;         /* Input buffer length. */
  18         size_t   iskip;         /* Returned input buffer. */
  19         char     ibuf[256];     /* Input buffer. */
  20
  21 #define IP_SCR_VI_INIT  0x0001  /* Vi screen initialized. */
  22         u_int32_t flags;
  23 } IP_PRIVATE;
  24
  25 #define IPP(sp)         ((IP_PRIVATE *)((sp)->gp->ip_private))
  26 #define GIPP(gp)        ((IP_PRIVATE *)((gp)->ip_private))
  27
  28 /* The screen line relative to a specific window. */
  29 #define RLNO(sp, lno)   (sp)->woff + (lno)
  30
  31 /*
  32  * The IP protocol consists of frames, each containing:
  33  *
  34  *      <IPO_><object>
  35  *
  36  * XXX
  37  * We should have a marking byte, 0xaa to delimit frames.
  38  *
  39  */
  40 #define IPO_CODE        1       /* An event specification. */
  41 #define IPO_INT         2       /* 4-byte, network order integer. */
  42 #define IPO_STR         3       /* IPO_INT: followed by N bytes. */
  43
  44 #define IPO_CODE_LEN    1
  45 #define IPO_INT_LEN     4
  46
  47 /* A structure that can hold the information for any frame. */
  48 typedef struct _ip_buf {
  49         int code;               /* Event code. */
  50         const char *str;        /* String. */
  51         size_t len;             /* String length. */
  52         u_int32_t val1;         /* First value. */
  53         u_int32_t val2;         /* Second value. */
  54 } IP_BUF;
  55
  56 /*
  57  * Screen/editor IP_CODE's.
  58  *
  59  * The program structure depends on the event loop being able to return
  60  * IPO_EOF/IPOE_ERR multiple times -- eventually enough things will end
  61  * due to the events that vi will reach the command level for the screen,
  62  * at which point the exit flags will be set and vi will exit.
  63  *
  64  * IP events sent from the screen to vi.
  65  */
  66 #define IPO_EOF          1      /* End of input (NOT ^D). */
  67 #define IPO_ERR          2      /* Input error. */
  68 #define IPO_INTERRUPT    3      /* Interrupt. */
  69 #define IPO_QUIT         4      /* Quit. */
  70 #define IPO_RESIZE       5      /* Screen resize: IPO_INT, IPO_INT. */
  71 #define IPO_SIGHUP       6      /* SIGHUP. */
  72 #define IPO_SIGTERM      7      /* SIGTERM. */
  73 #define IPO_STRING       8      /* Input string: IPO_STR. */
  74 #define IPO_WRITE        9      /* Write. */
  75
  76 /*
  77  * IP events sent from vi to the screen.
  78  */
  79 #define IPO_ADDSTR       1      /* Add a string: IPO_STR. */
  80 #define IPO_ATTRIBUTE    2      /* Set screen attribute: IPO_INT, IPO_INT. */
  81 #define IPO_BELL         3      /* Beep/bell/flash the terminal. */
  82 #define IPO_BUSY         4      /* Display a busy message: IPO_STR. */
  83 #define IPO_CLRTOEOL     5      /* Clear to the end of the line. */
  84 #define IPO_DELETELN     6      /* Delete a line. */
  85 #define IPO_INSERTLN     7      /* Insert a line. */
  86 #define IPO_MOVE         8      /* Move the cursor: IPO_INT, IPO_INT. */
  87 #define IPO_REDRAW       9      /* Redraw the screen. */
  88 #define IPO_REFRESH     10      /* Refresh the screen. */
  89 #define IPO_RENAME      11      /* Rename the screen: IPO_STR. */
  90 #define IPO_REWRITE     12      /* Rewrite a line: IPO_INT. */
  91
  92 #include "ip_extern.h"