1 /* TUI display source window.
3 Copyright (C) 1998-2014 Free Software Foundation, Inc.
5 Contributed by Hewlett-Packard Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "breakpoint.h"
30 #include "filenames.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"
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
)
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 const char *filename
= symtab_to_filename_for_display (s
);
67 char *name
= alloca (strlen (filename
) + 100);
69 sprintf (name
, "%s:%d", filename
, line_no
);
70 print_sys_errmsg (name
, errno
);
76 if (s
->line_charpos
== 0)
77 find_source_lines (s
, desc
);
79 if (line_no
< 1 || line_no
> s
->nlines
)
82 printf_unfiltered ("Line number %d out of range; "
85 symtab_to_filename_for_display (s
),
88 else if (lseek (desc
, s
->line_charpos
[line_no
- 1], 0) < 0)
91 perror_with_name (symtab_to_filename_for_display (s
));
95 int offset
, cur_line_no
, cur_line
, cur_len
, threshold
;
96 struct tui_gen_win_info
*locator
97 = tui_locator_win_info_ptr ();
98 struct tui_source_info
*src
99 = &TUI_SRC_WIN
->detail
.source_info
;
100 const char *s_filename
= symtab_to_filename_for_display (s
);
102 if (TUI_SRC_WIN
->generic
.title
)
103 xfree (TUI_SRC_WIN
->generic
.title
);
104 TUI_SRC_WIN
->generic
.title
= xstrdup (s_filename
);
106 xfree (src
->fullname
);
107 src
->fullname
= xstrdup (symtab_to_fullname (s
));
109 /* Determine the threshold for the length of the
110 line and the offset to start the display. */
111 offset
= src
->horizontal_offset
;
112 threshold
= (line_width
- 1) + offset
;
113 stream
= fdopen (desc
, FOPEN_RT
);
116 src
->gdbarch
= get_objfile_arch (s
->objfile
);
117 src
->start_line_or_addr
.loa
= LOA_LINE
;
118 cur_line_no
= src
->start_line_or_addr
.u
.line_no
= line_no
;
120 src_line
= (char *) xmalloc (
121 (threshold
+ 1) * sizeof (char));
122 while (cur_line
< nlines
)
124 struct tui_win_element
*element
125 = (struct tui_win_element
*)
126 TUI_SRC_WIN
->generic
.content
[cur_line
];
128 /* Get the first character in the line. */
132 src_line
= ((struct tui_win_element
*)
133 TUI_SRC_WIN
->generic
.content
[
134 cur_line
])->which_element
.source
.line
;
135 /* Init the line with the line number. */
136 sprintf (src_line
, "%-6d", cur_line_no
);
137 cur_len
= strlen (src_line
);
138 i
= cur_len
- ((cur_len
/ tui_default_tab_len ())
139 * tui_default_tab_len ());
140 while (i
< tui_default_tab_len ())
142 src_line
[cur_len
] = ' ';
146 src_line
[cur_len
] = (char) 0;
148 /* Set whether element is the execution point
149 and whether there is a break point on it. */
150 element
->which_element
.source
.line_or_addr
.loa
=
152 element
->which_element
.source
.line_or_addr
.u
.line_no
=
154 element
->which_element
.source
.is_exec_point
=
155 (filename_cmp (((struct tui_win_element
*)
156 locator
->content
[0])->which_element
.locator
.full_name
,
157 symtab_to_fullname (s
)) == 0
158 && cur_line_no
== ((struct tui_win_element
*)
159 locator
->content
[0])->which_element
.locator
.line_no
);
162 i
= strlen (src_line
) - 1;
165 if ((c
!= '\n') && (c
!= '\r')
166 && (++i
< threshold
))
168 if (c
< 040 && c
!= '\t')
171 src_line
[i
] = c
+ 0100;
179 { /* Store the charcter in the
180 line buffer. If it is a tab,
181 then translate to the correct
182 number of chars so we don't
183 overwrite our buffer. */
187 = tui_default_tab_len ();
189 for (j
= i
- ((i
/ max_tab_len
)
203 { /* If we have not reached EOL, then
204 eat chars until we do. */
205 while (c
!= EOF
&& c
!= '\n' && c
!= '\r')
207 /* Handle non-'\n' end-of-line. */
209 && (c
= fgetc (stream
)) != '\n'
218 while (c
!= EOF
&& c
!= '\n' && c
!= '\r'
220 && (c
= fgetc (stream
)));
222 /* Now copy the line taking the offset into
224 if (strlen (src_line
) > offset
)
225 strcpy (((struct tui_win_element
*)
226 TUI_SRC_WIN
->generic
.content
[cur_line
])->which_element
.source
.line
,
229 ((struct tui_win_element
*)
230 TUI_SRC_WIN
->generic
.content
[
231 cur_line
])->which_element
.source
.line
[0] = (char) 0;
238 TUI_SRC_WIN
->generic
.content_size
= nlines
;
248 /* elz: This function sets the contents of the source window to empty
249 except for a line in the middle with a warning message about the
250 source not being available. This function is called by
251 tui_erase_source_contents(), which in turn is invoked when the
252 source files cannot be accessed. */
255 tui_set_source_content_nil (struct tui_win_info
*win_info
,
256 char *warning_string
)
262 line_width
= win_info
->generic
.width
- 1;
263 n_lines
= win_info
->generic
.height
- 2;
265 /* Set to empty each line in the window, except for the one which
266 contains the message. */
267 while (curr_line
< win_info
->generic
.content_size
)
269 /* Set the information related to each displayed line to null:
270 i.e. the line number is 0, there is no bp, it is not where
271 the program is stopped. */
273 struct tui_win_element
*element
=
274 (struct tui_win_element
*) win_info
->generic
.content
[curr_line
];
276 element
->which_element
.source
.line_or_addr
.loa
= LOA_LINE
;
277 element
->which_element
.source
.line_or_addr
.u
.line_no
= 0;
278 element
->which_element
.source
.is_exec_point
= FALSE
;
279 element
->which_element
.source
.has_break
= FALSE
;
281 /* Set the contents of the line to blank. */
282 element
->which_element
.source
.line
[0] = (char) 0;
284 /* If the current line is in the middle of the screen, then we
285 want to display the 'no source available' message in it.
286 Note: the 'weird' arithmetic with the line width and height
287 comes from the function tui_erase_source_content(). We need
288 to keep the screen and the window's actual contents in
291 if (curr_line
== (n_lines
/ 2 + 1))
295 int warning_length
= strlen (warning_string
);
298 src_line
= element
->which_element
.source
.line
;
300 if (warning_length
>= ((line_width
- 1) / 2))
303 xpos
= (line_width
- 1) / 2 - warning_length
;
305 for (i
= 0; i
< xpos
; i
++)
308 sprintf (src_line
+ i
, "%s", warning_string
);
310 for (i
= xpos
+ warning_length
; i
< line_width
; i
++)
323 /* Function to display source in the source window. This function
324 initializes the horizontal scroll to 0. */
326 tui_show_symtab_source (struct gdbarch
*gdbarch
, struct symtab
*s
,
327 struct tui_line_or_address line
,
330 TUI_SRC_WIN
->detail
.source_info
.horizontal_offset
= 0;
331 tui_update_source_window_as_is (TUI_SRC_WIN
, gdbarch
, s
, line
, noerror
);
335 /* Answer whether the source is currently displayed in the source
338 tui_source_is_displayed (const char *fullname
)
340 return (TUI_SRC_WIN
!= NULL
341 && TUI_SRC_WIN
->generic
.content_in_use
342 && (filename_cmp (((struct tui_win_element
*)
343 (tui_locator_win_info_ptr ())->
344 content
[0])->which_element
.locator
.full_name
,
349 /* Scroll the source forward or backward vertically. */
351 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction
,
354 if (TUI_SRC_WIN
->generic
.content
!= NULL
)
356 struct tui_line_or_address l
;
358 tui_win_content content
= (tui_win_content
) TUI_SRC_WIN
->generic
.content
;
359 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
361 if (cursal
.symtab
== (struct symtab
*) NULL
)
362 s
= find_pc_symtab (get_frame_pc (get_selected_frame (NULL
)));
367 if (scroll_direction
== FORWARD_SCROLL
)
369 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
371 if (l
.u
.line_no
> s
->nlines
)
372 /* line = s->nlines - win_info->generic.content_size + 1; */
373 /* elz: fix for dts 23398. */
375 = content
[0]->which_element
.source
.line_or_addr
.u
.line_no
;
379 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
381 if (l
.u
.line_no
<= 0)
385 print_source_lines (s
, l
.u
.line_no
, l
.u
.line_no
+ 1, 0);