1 /* TUI display source window.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
4 2010 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);