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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
10 #include "config.h"
11
12 #ifndef lint
13 static const char sccsid[] = "$Id: ex_display.c,v 10.15 2001/06/25 15:19:15 skimo Exp $";
14 #endif /* not lint */
15
16 #include <sys/types.h>
17 #include <sys/queue.h>
18 #include <sys/time.h>
19
20 #include <bitstring.h>
21 #include <ctype.h>
22 #include <limits.h>
23 #include <stdio.h>
24 #include <string.h>
25
26 #include "../common/common.h"
27 #include "tag.h"
28
29 static int      is_prefix __P((ARGS *, CHAR_T *));
30 static int      bdisplay __P((SCR *));
31 static void     db __P((SCR *, CB *, const char *));
32
33 /*
34  * ex_display -- :display b[uffers] | c[onnections] | s[creens] | t[ags]
35  *
36  *      Display cscope connections, buffers, tags or screens.
37  *
38  * PUBLIC: int ex_display __P((SCR *, EXCMD *));
39  */
40 int
41 ex_display(SCR *sp, EXCMD *cmdp)
42 {
43         ARGS *arg;
44
45         arg = cmdp->argv[0];
46
47         switch (arg->bp[0]) {
48         case 'b':
49                 if (!is_prefix(arg, L("buffers")))
50                         break;
51                 return (bdisplay(sp));
52         case 'c':
53                 if (!is_prefix(arg, L("connections")))
54                         break;
55                 return (cscope_display(sp));
56         case 's':
57                 if (!is_prefix(arg, L("screens")))
58                         break;
59                 return (ex_sdisplay(sp));
60         case 't':
61                 if (!is_prefix(arg, L("tags")))
62                         break;
63                 return (ex_tag_display(sp));
64         }
65         ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
66         return (1);
67 }
68
69 /*
70  * is_prefix --
71  *
72  *      Check that a command argument matches a prefix of a given string.
73  */
74 static int
75 is_prefix(ARGS *arg, CHAR_T *str)
76 {
77         return arg->len <= STRLEN(str) && !MEMCMP(arg->bp, str, arg->len);
78 }
79
80 /*
81  * bdisplay --
82  *
83  *      Display buffers.
84  */
85 static int
86 bdisplay(SCR *sp)
87 {
88         CB *cbp;
89
90         if (SLIST_EMPTY(sp->gp->cutq) && sp->gp->dcbp == NULL) {
91                 msgq(sp, M_INFO, "123|No cut buffers to display");
92                 return (0);
93         }
94
95         /* Display regular cut buffers. */
96         SLIST_FOREACH(cbp, sp->gp->cutq, q) {
97                 if (isdigit(cbp->name))
98                         continue;
99                 if (!TAILQ_EMPTY(cbp->textq))
100                         db(sp, cbp, NULL);
101                 if (INTERRUPTED(sp))
102                         return (0);
103         }
104         /* Display numbered buffers. */
105         SLIST_FOREACH(cbp, sp->gp->cutq, q) {
106                 if (!isdigit(cbp->name))
107                         continue;
108                 if (!TAILQ_EMPTY(cbp->textq))
109                         db(sp, cbp, NULL);
110                 if (INTERRUPTED(sp))
111                         return (0);
112         }
113         /* Display default buffer. */
114         if ((cbp = sp->gp->dcbp) != NULL)
115                 db(sp, cbp, "default buffer");
116         return (0);
117 }
118
119 /*
120  * db --
121  *      Display a buffer.
122  */
123 static void
124 db(SCR *sp, CB *cbp, const char *name)
125 {
126         CHAR_T *p;
127         GS *gp;
128         TEXT *tp;
129         size_t len;
130
131         gp = sp->gp;
132         (void)ex_printf(sp, "********** %s%s\n",
133             name == NULL ? KEY_NAME(sp, cbp->name) : name,
134             F_ISSET(cbp, CB_LMODE) ? " (line mode)" : " (character mode)");
135         TAILQ_FOREACH(tp, cbp->textq, q) {
136                 for (len = tp->len, p = tp->lb; len--; ++p) {
137                         (void)ex_puts(sp, KEY_NAME(sp, *p));
138                         if (INTERRUPTED(sp))
139                                 return;
140                 }
141                 (void)ex_puts(sp, "\n");
142         }
143 }