contrib/nvi/ex/tag.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  * Copyright (c) 1994, 1996
   7  *      Rob Mayoff.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  *
  11  *      @(#)tag.h       10.5 (Berkeley) 5/15/96
  12  */
  13
  14 /*
  15  * Cscope connection information.  One of these is maintained per cscope
  16  * connection, linked from the EX_PRIVATE structure.
  17  */
  18 struct _csc {
  19         LIST_ENTRY(_csc) q;     /* Linked list of cscope connections. */
  20
  21         char    *dname;         /* Base directory of this cscope connection. */
  22         size_t   dlen;          /* Length of base directory. */
  23         pid_t    pid;           /* PID of the connected cscope process. */
  24         time_t   mtime;         /* Last modification time of cscope database. */
  25
  26         FILE    *from_fp;       /* from cscope: FILE. */
  27         int      from_fd;       /* from cscope: file descriptor. */
  28         FILE    *to_fp;         /* to cscope: FILE. */
  29         int      to_fd;         /* to cscope: file descriptor. */
  30
  31         char   **paths;         /* Array of search paths for this cscope. */
  32         char    *pbuf;          /* Search path buffer. */
  33         size_t   pblen;         /* Search path buffer length. */
  34
  35         char     buf[1];        /* Variable length buffer. */
  36 };
  37
  38 /*
  39  * Tag file information.  One of these is maintained per tag file, linked
  40  * from the EXPRIVATE structure.
  41  */
  42 struct _tagf {                  /* Tag files. */
  43         TAILQ_ENTRY(_tagf) q;   /* Linked list of tag files. */
  44         char    *name;          /* Tag file name. */
  45         int      errnum;        /* Errno. */
  46
  47 #define TAGF_ERR        0x01    /* Error occurred. */
  48 #define TAGF_ERR_WARN   0x02    /* Error reported. */
  49         u_int8_t flags;
  50 };
  51
  52 /*
  53  * Tags are structured internally as follows:
  54  *
  55  * +----+    +----+     +----+     +----+
  56  * | EP | -> | Q1 | <-- | T1 | <-- | T2 |
  57  * +----+    +----+ --> +----+ --> +----+
  58  *           |
  59  *           +----+     +----+
  60  *           | Q2 | <-- | T1 |
  61  *           +----+ --> +----+
  62  *           |
  63  *           +----+     +----+
  64  *           | Q3 | <-- | T1 |
  65  *           +----+ --> +----+
  66  *
  67  * Each Q is a TAGQ, or tag "query", which is the result of one tag or cscope
  68  * command.  Each Q references one or more TAG's, or tagged file locations.
  69  *
  70  * tag:         put a new Q at the head (^])
  71  * tagnext:     T1 -> T2 inside Q       (^N)
  72  * tagprev:     T2 -> T1 inside Q       (^P)
  73  * tagpop:      discard Q               (^T)
  74  * tagtop:      discard all Q
  75  */
  76 struct _tag {                   /* Tag list. */
  77         CIRCLEQ_ENTRY(_tag) q;  /* Linked list of tags. */
  78
  79                                 /* Tag pop/return information. */
  80         FREF    *frp;           /* Saved file. */
  81         recno_t  lno;           /* Saved line number. */
  82         size_t   cno;           /* Saved column number. */
  83
  84         char    *fname;         /* Filename. */
  85         size_t   fnlen;         /* Filename length. */
  86         recno_t  slno;          /* Search line number. */
  87         char    *search;        /* Search string. */
  88         size_t   slen;          /* Search string length. */
  89
  90         char     buf[1];        /* Variable length buffer. */
  91 };
  92
  93 struct _tagq {                  /* Tag queue. */
  94         CIRCLEQ_ENTRY(_tagq) q; /* Linked list of tag queues. */
  95                                 /* This queue's tag list. */
  96         CIRCLEQ_HEAD(_tagqh, _tag) tagq;
  97
  98         TAG     *current;       /* Current TAG within the queue. */
  99
 100         char    *tag;           /* Tag string. */
 101         size_t   tlen;          /* Tag string length. */
 102
 103 #define TAG_CSCOPE      0x01    /* Cscope tag. */
 104         u_int8_t flags;
 105
 106         char     buf[1];        /* Variable length buffer. */
 107 };