1 /* TUI display source window.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
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"
32 #include "tui/tui-data.h"
33 #include "tui/tui-stack.h"
34 #include "tui/tui-winsource.h"
35 #include "tui/tui-source.h"
37 #include "gdb_string.h"
38 #include "gdb_curses.h"
40 /* Function to display source in the source window. */
42 tui_set_source_content (struct symtab *s,
46 enum tui_status ret = TUI_FAILURE;
48 if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
51 int i, desc, c, line_width, nlines;
54 if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
56 line_width = TUI_SRC_WIN->generic.width - 1;
57 /* Take hilite (window border) into account, when
58 calculating the number of lines. */
59 nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no;
60 desc = open_source_file (s);
65 char *name = alloca (strlen (s->filename) + 100);
66 sprintf (name, "%s:%d", s->filename, line_no);
67 print_sys_errmsg (name, errno);
73 if (s->line_charpos == 0)
74 find_source_lines (s, desc);
76 if (line_no < 1 || line_no > s->nlines)
80 "Line number %d out of range; %s has %d lines.\n",
81 line_no, s->filename, s->nlines);
83 else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0)
86 perror_with_name (s->filename);
90 int offset, cur_line_no, cur_line, cur_len, threshold;
91 struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
92 struct tui_source_info *src = &TUI_SRC_WIN->detail.source_info;
94 if (TUI_SRC_WIN->generic.title)
95 xfree (TUI_SRC_WIN->generic.title);
96 TUI_SRC_WIN->generic.title = xstrdup (s->filename);
99 xfree (src->filename);
100 src->filename = xstrdup (s->filename);
102 /* Determine the threshold for the length of the
103 line and the offset to start the display. */
104 offset = src->horizontal_offset;
105 threshold = (line_width - 1) + offset;
106 stream = fdopen (desc, FOPEN_RT);
109 src->start_line_or_addr.loa = LOA_LINE;
110 cur_line_no = src->start_line_or_addr.u.line_no = line_no;
112 src_line = (char *) xmalloc (
113 (threshold + 1) * sizeof (char));
114 while (cur_line < nlines)
116 struct tui_win_element *element = (struct tui_win_element *)
117 TUI_SRC_WIN->generic.content[cur_line];
119 /* Get the first character in the line. */
123 src_line = ((struct tui_win_element *)
124 TUI_SRC_WIN->generic.content[
125 cur_line])->which_element.source.line;
126 /* Init the line with the line number. */
127 sprintf (src_line, "%-6d", cur_line_no);
128 cur_len = strlen (src_line);
130 ((cur_len / tui_default_tab_len ()) * tui_default_tab_len ());
131 while (i < tui_default_tab_len ())
133 src_line[cur_len] = ' ';
137 src_line[cur_len] = (char) 0;
139 /* Set whether element is the execution point
140 and whether there is a break point on it. */
141 element->which_element.source.line_or_addr.loa =
143 element->which_element.source.line_or_addr.u.line_no =
145 element->which_element.source.is_exec_point =
146 (strcmp (((struct tui_win_element *)
147 locator->content[0])->which_element.locator.file_name,
149 && cur_line_no == ((struct tui_win_element *)
150 locator->content[0])->which_element.locator.line_no);
153 i = strlen (src_line) - 1;
156 if ((c != '\n') && (c != '\r')
157 && (++i < threshold))
159 if (c < 040 && c != '\t')
162 src_line[i] = c + 0100;
170 { /* Store the charcter in the
171 line buffer. If it is a tab,
172 then translate to the correct
173 number of chars so we don't
174 overwrite our buffer. */
177 int j, max_tab_len = tui_default_tab_len ();
179 for (j = i - ((i / max_tab_len) * max_tab_len);
192 { /* If we have not reached EOL, then
193 eat chars until we do. */
194 while (c != EOF && c != '\n' && c != '\r')
196 /* Handle non-'\n' end-of-line. */
198 && (c = fgetc (stream)) != '\n'
207 while (c != EOF && c != '\n' && c != '\r'
209 && (c = fgetc (stream)));
211 /* Now copy the line taking the offset into
213 if (strlen (src_line) > offset)
214 strcpy (((struct tui_win_element *) TUI_SRC_WIN->generic.content[
215 cur_line])->which_element.source.line,
218 ((struct tui_win_element *)
219 TUI_SRC_WIN->generic.content[
220 cur_line])->which_element.source.line[0] = (char) 0;
227 TUI_SRC_WIN->generic.content_size = nlines;
237 /* elz: This function sets the contents of the source window to empty
238 except for a line in the middle with a warning message about the
239 source not being available. This function is called by
240 tui_erase_source_contents(), which in turn is invoked when the
241 source files cannot be accessed. */
244 tui_set_source_content_nil (struct tui_win_info *win_info,
245 char *warning_string)
251 line_width = win_info->generic.width - 1;
252 n_lines = win_info->generic.height - 2;
254 /* Set to empty each line in the window, except for the one which
255 contains the message. */
256 while (curr_line < win_info->generic.content_size)
258 /* Set the information related to each displayed line to null:
259 i.e. the line number is 0, there is no bp, it is not where
260 the program is stopped. */
262 struct tui_win_element *element =
263 (struct tui_win_element *) win_info->generic.content[curr_line];
264 element->which_element.source.line_or_addr.loa = LOA_LINE;
265 element->which_element.source.line_or_addr.u.line_no = 0;
266 element->which_element.source.is_exec_point = FALSE;
267 element->which_element.source.has_break = FALSE;
269 /* Set the contents of the line to blank. */
270 element->which_element.source.line[0] = (char) 0;
272 /* If the current line is in the middle of the screen, then we
273 want to display the 'no source available' message in it.
274 Note: the 'weird' arithmetic with the line width and height
275 comes from the function tui_erase_source_content(). We need
276 to keep the screen and the window's actual contents in
279 if (curr_line == (n_lines / 2 + 1))
283 int warning_length = strlen (warning_string);
286 src_line = element->which_element.source.line;
288 if (warning_length >= ((line_width - 1) / 2))
291 xpos = (line_width - 1) / 2 - warning_length;
293 for (i = 0; i < xpos; i++)
296 sprintf (src_line + i, "%s", warning_string);
298 for (i = xpos + warning_length; i < line_width; i++)
311 /* Function to display source in the source window. This function
312 initializes the horizontal scroll to 0. */
314 tui_show_symtab_source (struct symtab *s,
315 struct tui_line_or_address line,
318 TUI_SRC_WIN->detail.source_info.horizontal_offset = 0;
319 tui_update_source_window_as_is (TUI_SRC_WIN, s, line, noerror);
323 /* Answer whether the source is currently displayed in the source
326 tui_source_is_displayed (char *fname)
328 return (TUI_SRC_WIN->generic.content_in_use
329 && (strcmp (((struct tui_win_element *) (tui_locator_win_info_ptr ())->
330 content[0])->which_element.locator.file_name, fname) == 0));
334 /* Scroll the source forward or backward vertically. */
336 tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction,
339 if (TUI_SRC_WIN->generic.content != NULL)
341 struct tui_line_or_address l;
343 tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content;
344 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
346 if (cursal.symtab == (struct symtab *) NULL)
347 s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL)));
352 if (scroll_direction == FORWARD_SCROLL)
354 l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
356 if (l.u.line_no > s->nlines)
357 /* line = s->nlines - win_info->generic.content_size + 1; */
358 /* elz: fix for dts 23398. */
359 l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no;
363 l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
365 if (l.u.line_no <= 0)
369 print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0);