1 /* TUI display source window.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 Contributed by Hewlett-Packard Company.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "breakpoint.h"
33 #include "tui/tui-data.h"
34 #include "tui/tui-stack.h"
35 #include "tui/tui-winsource.h"
36 #include "tui/tui-source.h"
38 #include "gdb_string.h"
39 #include "gdb_curses.h"
41 /* Function to display source in the source window. */
43 tui_set_source_content (struct symtab
*s
,
47 enum tui_status ret
= TUI_FAILURE
;
49 if (s
!= (struct symtab
*) NULL
&& s
->filename
!= (char *) NULL
)
52 int i
, desc
, c
, line_width
, nlines
;
55 if ((ret
= tui_alloc_source_buffer (TUI_SRC_WIN
)) == TUI_SUCCESS
)
57 line_width
= TUI_SRC_WIN
->generic
.width
- 1;
58 /* Take hilite (window border) into account, when
59 calculating the number of lines. */
60 nlines
= (line_no
+ (TUI_SRC_WIN
->generic
.height
- 2)) - line_no
;
61 desc
= open_source_file (s
);
66 char *name
= alloca (strlen (s
->filename
) + 100);
67 sprintf (name
, "%s:%d", s
->filename
, line_no
);
68 print_sys_errmsg (name
, errno
);
74 if (s
->line_charpos
== 0)
75 find_source_lines (s
, desc
);
77 if (line_no
< 1 || line_no
> s
->nlines
)
81 "Line number %d out of range; %s has %d lines.\n",
82 line_no
, s
->filename
, s
->nlines
);
84 else if (lseek (desc
, s
->line_charpos
[line_no
- 1], 0) < 0)
87 perror_with_name (s
->filename
);
91 int offset
, cur_line_no
, cur_line
, cur_len
, threshold
;
92 struct tui_gen_win_info
*locator
= tui_locator_win_info_ptr ();
93 struct tui_source_info
*src
= &TUI_SRC_WIN
->detail
.source_info
;
95 if (TUI_SRC_WIN
->generic
.title
)
96 xfree (TUI_SRC_WIN
->generic
.title
);
97 TUI_SRC_WIN
->generic
.title
= xstrdup (s
->filename
);
100 xfree (src
->filename
);
101 src
->filename
= xstrdup (s
->filename
);
103 /* Determine the threshold for the length of the
104 line and the offset to start the display. */
105 offset
= src
->horizontal_offset
;
106 threshold
= (line_width
- 1) + offset
;
107 stream
= fdopen (desc
, FOPEN_RT
);
110 src
->gdbarch
= get_objfile_arch (s
->objfile
);
111 src
->start_line_or_addr
.loa
= LOA_LINE
;
112 cur_line_no
= src
->start_line_or_addr
.u
.line_no
= line_no
;
114 src_line
= (char *) xmalloc (
115 (threshold
+ 1) * sizeof (char));
116 while (cur_line
< nlines
)
118 struct tui_win_element
*element
= (struct tui_win_element
*)
119 TUI_SRC_WIN
->generic
.content
[cur_line
];
121 /* Get the first character in the line. */
125 src_line
= ((struct tui_win_element
*)
126 TUI_SRC_WIN
->generic
.content
[
127 cur_line
])->which_element
.source
.line
;
128 /* Init the line with the line number. */
129 sprintf (src_line
, "%-6d", cur_line_no
);
130 cur_len
= strlen (src_line
);
132 ((cur_len
/ tui_default_tab_len ()) * tui_default_tab_len ());
133 while (i
< tui_default_tab_len ())
135 src_line
[cur_len
] = ' ';
139 src_line
[cur_len
] = (char) 0;
141 /* Set whether element is the execution point
142 and whether there is a break point on it. */
143 element
->which_element
.source
.line_or_addr
.loa
=
145 element
->which_element
.source
.line_or_addr
.u
.line_no
=
147 element
->which_element
.source
.is_exec_point
=
148 (strcmp (((struct tui_win_element
*)
149 locator
->content
[0])->which_element
.locator
.file_name
,
151 && cur_line_no
== ((struct tui_win_element
*)
152 locator
->content
[0])->which_element
.locator
.line_no
);
155 i
= strlen (src_line
) - 1;
158 if ((c
!= '\n') && (c
!= '\r')
159 && (++i
< threshold
))
161 if (c
< 040 && c
!= '\t')
164 src_line
[i
] = c
+ 0100;
172 { /* Store the charcter in the
173 line buffer. If it is a tab,
174 then translate to the correct
175 number of chars so we don't
176 overwrite our buffer. */
179 int j
, max_tab_len
= tui_default_tab_len ();
181 for (j
= i
- ((i
/ max_tab_len
) * max_tab_len
);
194 { /* If we have not reached EOL, then
195 eat chars until we do. */
196 while (c
!= EOF
&& c
!= '\n' && c
!= '\r')
198 /* Handle non-'\n' end-of-line. */
200 && (c
= fgetc (stream
)) != '\n'
209 while (c
!= EOF
&& c
!= '\n' && c
!= '\r'
211 && (c
= fgetc (stream
)));
213 /* Now copy the line taking the offset into
215 if (strlen (src_line
) > offset
)
216 strcpy (((struct tui_win_element
*) TUI_SRC_WIN
->generic
.content
[
217 cur_line
])->which_element
.source
.line
,
220 ((struct tui_win_element
*)
221 TUI_SRC_WIN
->generic
.content
[
222 cur_line
])->which_element
.source
.line
[0] = (char) 0;
229 TUI_SRC_WIN
->generic
.content_size
= nlines
;
239 /* elz: This function sets the contents of the source window to empty
240 except for a line in the middle with a warning message about the
241 source not being available. This function is called by
242 tui_erase_source_contents(), which in turn is invoked when the
243 source files cannot be accessed. */
246 tui_set_source_content_nil (struct tui_win_info
*win_info
,
247 char *warning_string
)
253 line_width
= win_info
->generic
.width
- 1;
254 n_lines
= win_info
->generic
.height
- 2;
256 /* Set to empty each line in the window, except for the one which
257 contains the message. */
258 while (curr_line
< win_info
->generic
.content_size
)
260 /* Set the information related to each displayed line to null:
261 i.e. the line number is 0, there is no bp, it is not where
262 the program is stopped. */
264 struct tui_win_element
*element
=
265 (struct tui_win_element
*) win_info
->generic
.content
[curr_line
];
266 element
->which_element
.source
.line_or_addr
.loa
= LOA_LINE
;
267 element
->which_element
.source
.line_or_addr
.u
.line_no
= 0;
268 element
->which_element
.source
.is_exec_point
= FALSE
;
269 element
->which_element
.source
.has_break
= FALSE
;
271 /* Set the contents of the line to blank. */
272 element
->which_element
.source
.line
[0] = (char) 0;
274 /* If the current line is in the middle of the screen, then we
275 want to display the 'no source available' message in it.
276 Note: the 'weird' arithmetic with the line width and height
277 comes from the function tui_erase_source_content(). We need
278 to keep the screen and the window's actual contents in
281 if (curr_line
== (n_lines
/ 2 + 1))
285 int warning_length
= strlen (warning_string
);
288 src_line
= element
->which_element
.source
.line
;
290 if (warning_length
>= ((line_width
- 1) / 2))
293 xpos
= (line_width
- 1) / 2 - warning_length
;
295 for (i
= 0; i
< xpos
; i
++)
298 sprintf (src_line
+ i
, "%s", warning_string
);
300 for (i
= xpos
+ warning_length
; i
< line_width
; i
++)
313 /* Function to display source in the source window. This function
314 initializes the horizontal scroll to 0. */
316 tui_show_symtab_source (struct gdbarch
*gdbarch
, struct symtab
*s
,
317 struct tui_line_or_address line
,
320 TUI_SRC_WIN
->detail
.source_info
.horizontal_offset
= 0;
321 tui_update_source_window_as_is (TUI_SRC_WIN
, gdbarch
, s
, line
, noerror
);
325 /* Answer whether the source is currently displayed in the source
328 tui_source_is_displayed (char *fname
)
330 return (TUI_SRC_WIN
->generic
.content_in_use
331 && (strcmp (((struct tui_win_element
*) (tui_locator_win_info_ptr ())->
332 content
[0])->which_element
.locator
.file_name
, fname
) == 0));
336 /* Scroll the source forward or backward vertically. */
338 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction
,
341 if (TUI_SRC_WIN
->generic
.content
!= NULL
)
343 struct tui_line_or_address l
;
345 tui_win_content content
= (tui_win_content
) TUI_SRC_WIN
->generic
.content
;
346 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
348 if (cursal
.symtab
== (struct symtab
*) NULL
)
349 s
= find_pc_symtab (get_frame_pc (get_selected_frame (NULL
)));
354 if (scroll_direction
== FORWARD_SCROLL
)
356 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
358 if (l
.u
.line_no
> s
->nlines
)
359 /* line = s->nlines - win_info->generic.content_size + 1; */
360 /* elz: fix for dts 23398. */
361 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
;
365 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
367 if (l
.u
.line_no
<= 0)
371 print_source_lines (s
, l
.u
.line_no
, l
.u
.line_no
+ 1, 0);