1 /* TUI display source window.
3 Copyright (C) 1998-2013 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"
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)
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);