1 /* TUI display source window.
3 Copyright (C) 1998-2015 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"
37 #include "gdb_curses.h"
39 /* Function to display source in the source window. */
41 tui_set_source_content (struct symtab
*s
,
45 enum tui_status ret
= TUI_FAILURE
;
47 if (s
!= (struct symtab
*) NULL
)
50 int i
, desc
, c
, line_width
, nlines
;
53 if ((ret
= tui_alloc_source_buffer (TUI_SRC_WIN
)) == TUI_SUCCESS
)
55 line_width
= TUI_SRC_WIN
->generic
.width
- 1;
56 /* Take hilite (window border) into account, when
57 calculating the number of lines. */
58 nlines
= (line_no
+ (TUI_SRC_WIN
->generic
.height
- 2)) - line_no
;
59 desc
= open_source_file (s
);
64 const char *filename
= symtab_to_filename_for_display (s
);
65 char *name
= alloca (strlen (filename
) + 100);
67 sprintf (name
, "%s:%d", 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
)
80 printf_unfiltered ("Line number %d out of range; "
83 symtab_to_filename_for_display (s
),
86 else if (lseek (desc
, s
->line_charpos
[line_no
- 1], 0) < 0)
89 perror_with_name (symtab_to_filename_for_display (s
));
93 int offset
, cur_line_no
, cur_line
, cur_len
, threshold
;
94 struct tui_gen_win_info
*locator
95 = tui_locator_win_info_ptr ();
96 struct tui_source_info
*src
97 = &TUI_SRC_WIN
->detail
.source_info
;
98 const char *s_filename
= symtab_to_filename_for_display (s
);
100 if (TUI_SRC_WIN
->generic
.title
)
101 xfree (TUI_SRC_WIN
->generic
.title
);
102 TUI_SRC_WIN
->generic
.title
= xstrdup (s_filename
);
104 xfree (src
->fullname
);
105 src
->fullname
= xstrdup (symtab_to_fullname (s
));
107 /* Determine the threshold for the length of the
108 line and the offset to start the display. */
109 offset
= src
->horizontal_offset
;
110 threshold
= (line_width
- 1) + offset
;
111 stream
= fdopen (desc
, FOPEN_RT
);
114 src
->gdbarch
= get_objfile_arch (SYMTAB_OBJFILE (s
));
115 src
->start_line_or_addr
.loa
= LOA_LINE
;
116 cur_line_no
= src
->start_line_or_addr
.u
.line_no
= line_no
;
118 src_line
= (char *) xmalloc (
119 (threshold
+ 1) * sizeof (char));
120 while (cur_line
< nlines
)
122 struct tui_win_element
*element
123 = (struct tui_win_element
*)
124 TUI_SRC_WIN
->generic
.content
[cur_line
];
126 /* Get the first character in the line. */
130 src_line
= ((struct tui_win_element
*)
131 TUI_SRC_WIN
->generic
.content
[
132 cur_line
])->which_element
.source
.line
;
133 /* Init the line with the line number. */
134 sprintf (src_line
, "%-6d", cur_line_no
);
135 cur_len
= strlen (src_line
);
136 i
= cur_len
- ((cur_len
/ tui_default_tab_len ())
137 * tui_default_tab_len ());
138 while (i
< tui_default_tab_len ())
140 src_line
[cur_len
] = ' ';
144 src_line
[cur_len
] = (char) 0;
146 /* Set whether element is the execution point
147 and whether there is a break point on it. */
148 element
->which_element
.source
.line_or_addr
.loa
=
150 element
->which_element
.source
.line_or_addr
.u
.line_no
=
152 element
->which_element
.source
.is_exec_point
=
153 (filename_cmp (((struct tui_win_element
*)
154 locator
->content
[0])->which_element
.locator
.full_name
,
155 symtab_to_fullname (s
)) == 0
156 && cur_line_no
== ((struct tui_win_element
*)
157 locator
->content
[0])->which_element
.locator
.line_no
);
160 i
= strlen (src_line
) - 1;
163 if ((c
!= '\n') && (c
!= '\r')
164 && (++i
< threshold
))
166 if (c
< 040 && c
!= '\t')
169 src_line
[i
] = c
+ 0100;
177 { /* Store the charcter in the
178 line buffer. If it is a tab,
179 then translate to the correct
180 number of chars so we don't
181 overwrite our buffer. */
185 = tui_default_tab_len ();
187 for (j
= i
- ((i
/ max_tab_len
)
201 { /* If we have not reached EOL, then
202 eat chars until we do. */
203 while (c
!= EOF
&& c
!= '\n' && c
!= '\r')
205 /* Handle non-'\n' end-of-line. */
207 && (c
= fgetc (stream
)) != '\n'
216 while (c
!= EOF
&& c
!= '\n' && c
!= '\r'
218 && (c
= fgetc (stream
)));
220 /* Now copy the line taking the offset into
222 if (strlen (src_line
) > offset
)
223 strcpy (((struct tui_win_element
*)
224 TUI_SRC_WIN
->generic
.content
[cur_line
])->which_element
.source
.line
,
227 ((struct tui_win_element
*)
228 TUI_SRC_WIN
->generic
.content
[
229 cur_line
])->which_element
.source
.line
[0] = (char) 0;
236 TUI_SRC_WIN
->generic
.content_size
= nlines
;
246 /* elz: This function sets the contents of the source window to empty
247 except for a line in the middle with a warning message about the
248 source not being available. This function is called by
249 tui_erase_source_contents(), which in turn is invoked when the
250 source files cannot be accessed. */
253 tui_set_source_content_nil (struct tui_win_info
*win_info
,
254 char *warning_string
)
260 line_width
= win_info
->generic
.width
- 1;
261 n_lines
= win_info
->generic
.height
- 2;
263 /* Set to empty each line in the window, except for the one which
264 contains the message. */
265 while (curr_line
< win_info
->generic
.content_size
)
267 /* Set the information related to each displayed line to null:
268 i.e. the line number is 0, there is no bp, it is not where
269 the program is stopped. */
271 struct tui_win_element
*element
=
272 (struct tui_win_element
*) win_info
->generic
.content
[curr_line
];
274 element
->which_element
.source
.line_or_addr
.loa
= LOA_LINE
;
275 element
->which_element
.source
.line_or_addr
.u
.line_no
= 0;
276 element
->which_element
.source
.is_exec_point
= FALSE
;
277 element
->which_element
.source
.has_break
= FALSE
;
279 /* Set the contents of the line to blank. */
280 element
->which_element
.source
.line
[0] = (char) 0;
282 /* If the current line is in the middle of the screen, then we
283 want to display the 'no source available' message in it.
284 Note: the 'weird' arithmetic with the line width and height
285 comes from the function tui_erase_source_content(). We need
286 to keep the screen and the window's actual contents in
289 if (curr_line
== (n_lines
/ 2 + 1))
293 int warning_length
= strlen (warning_string
);
296 src_line
= element
->which_element
.source
.line
;
298 if (warning_length
>= ((line_width
- 1) / 2))
301 xpos
= (line_width
- 1) / 2 - warning_length
;
303 for (i
= 0; i
< xpos
; i
++)
306 sprintf (src_line
+ i
, "%s", warning_string
);
308 for (i
= xpos
+ warning_length
; i
< line_width
; i
++)
321 /* Function to display source in the source window. This function
322 initializes the horizontal scroll to 0. */
324 tui_show_symtab_source (struct gdbarch
*gdbarch
, struct symtab
*s
,
325 struct tui_line_or_address line
,
328 TUI_SRC_WIN
->detail
.source_info
.horizontal_offset
= 0;
329 tui_update_source_window_as_is (TUI_SRC_WIN
, gdbarch
, s
, line
, noerror
);
333 /* Answer whether the source is currently displayed in the source
336 tui_source_is_displayed (const char *fullname
)
338 return (TUI_SRC_WIN
!= NULL
339 && TUI_SRC_WIN
->generic
.content_in_use
340 && (filename_cmp (((struct tui_win_element
*)
341 (tui_locator_win_info_ptr ())->
342 content
[0])->which_element
.locator
.full_name
,
347 /* Scroll the source forward or backward vertically. */
349 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction
,
352 if (TUI_SRC_WIN
->generic
.content
!= NULL
)
354 struct tui_line_or_address l
;
356 tui_win_content content
= (tui_win_content
) TUI_SRC_WIN
->generic
.content
;
357 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
359 if (cursal
.symtab
== (struct symtab
*) NULL
)
360 s
= find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL
)));
365 if (scroll_direction
== FORWARD_SCROLL
)
367 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
369 if (l
.u
.line_no
> s
->nlines
)
370 /* line = s->nlines - win_info->generic.content_size + 1; */
371 /* elz: fix for dts 23398. */
373 = content
[0]->which_element
.source
.line_or_addr
.u
.line_no
;
377 l
.u
.line_no
= content
[0]->which_element
.source
.line_or_addr
.u
.line_no
379 if (l
.u
.line_no
<= 0)
383 print_source_lines (s
, l
.u
.line_no
, l
.u
.line_no
+ 1, 0);