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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [gdb/] [tui/] [tui-source.c] - Blame information for rev 330

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1 330 jeremybenn
/* TUI display source window.
2
 
3
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
4
   2010 Free Software Foundation, Inc.
5
 
6
   Contributed by Hewlett-Packard Company.
7
 
8
   This file is part of GDB.
9
 
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.
14
 
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.
19
 
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/>.  */
22
 
23
#include "defs.h"
24
#include <ctype.h>
25
#include "symtab.h"
26
#include "frame.h"
27
#include "breakpoint.h"
28
#include "source.h"
29
#include "symtab.h"
30
#include "objfiles.h"
31
 
32
#include "tui/tui.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
 
38
#include "gdb_string.h"
39
#include "gdb_curses.h"
40
 
41
/* Function to display source in the source window.  */
42
enum tui_status
43
tui_set_source_content (struct symtab *s,
44
                        int line_no,
45
                        int noerror)
46
{
47
  enum tui_status ret = TUI_FAILURE;
48
 
49
  if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
50
    {
51
      FILE *stream;
52
      int i, desc, c, line_width, nlines;
53
      char *src_line = 0;
54
 
55
      if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
56
        {
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);
62
          if (desc < 0)
63
            {
64
              if (!noerror)
65
                {
66
                  char *name = alloca (strlen (s->filename) + 100);
67
 
68
                  sprintf (name, "%s:%d", s->filename, line_no);
69
                  print_sys_errmsg (name, errno);
70
                }
71
              ret = TUI_FAILURE;
72
            }
73
          else
74
            {
75
              if (s->line_charpos == 0)
76
                find_source_lines (s, desc);
77
 
78
              if (line_no < 1 || line_no > s->nlines)
79
                {
80
                  close (desc);
81
                  printf_unfiltered (
82
                          "Line number %d out of range; %s has %d lines.\n",
83
                                      line_no, s->filename, s->nlines);
84
                }
85
              else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0)
86
                {
87
                  close (desc);
88
                  perror_with_name (s->filename);
89
                }
90
              else
91
                {
92
                  int offset, cur_line_no, cur_line, cur_len, threshold;
93
                  struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
94
                  struct tui_source_info *src = &TUI_SRC_WIN->detail.source_info;
95
 
96
                  if (TUI_SRC_WIN->generic.title)
97
                    xfree (TUI_SRC_WIN->generic.title);
98
                  TUI_SRC_WIN->generic.title = xstrdup (s->filename);
99
 
100
                  if (src->filename)
101
                    xfree (src->filename);
102
                  src->filename = xstrdup (s->filename);
103
 
104
                  /* Determine the threshold for the length of the
105
                     line and the offset to start the display.  */
106
                  offset = src->horizontal_offset;
107
                  threshold = (line_width - 1) + offset;
108
                  stream = fdopen (desc, FOPEN_RT);
109
                  clearerr (stream);
110
                  cur_line = 0;
111
                  src->gdbarch = get_objfile_arch (s->objfile);
112
                  src->start_line_or_addr.loa = LOA_LINE;
113
                  cur_line_no = src->start_line_or_addr.u.line_no = line_no;
114
                  if (offset > 0)
115
                    src_line = (char *) xmalloc (
116
                                           (threshold + 1) * sizeof (char));
117
                  while (cur_line < nlines)
118
                    {
119
                      struct tui_win_element *element = (struct tui_win_element *)
120
                        TUI_SRC_WIN->generic.content[cur_line];
121
 
122
                      /* Get the first character in the line.  */
123
                      c = fgetc (stream);
124
 
125
                      if (offset == 0)
126
                        src_line = ((struct tui_win_element *)
127
                                   TUI_SRC_WIN->generic.content[
128
                                        cur_line])->which_element.source.line;
129
                      /* Init the line with the line number.  */
130
                      sprintf (src_line, "%-6d", cur_line_no);
131
                      cur_len = strlen (src_line);
132
                      i = cur_len -
133
                        ((cur_len / tui_default_tab_len ()) * tui_default_tab_len ());
134
                      while (i < tui_default_tab_len ())
135
                        {
136
                          src_line[cur_len] = ' ';
137
                          i++;
138
                          cur_len++;
139
                        }
140
                      src_line[cur_len] = (char) 0;
141
 
142
                      /* Set whether element is the execution point
143
                         and whether there is a break point on it.  */
144
                      element->which_element.source.line_or_addr.loa =
145
                        LOA_LINE;
146
                      element->which_element.source.line_or_addr.u.line_no =
147
                        cur_line_no;
148
                      element->which_element.source.is_exec_point =
149
                        (strcmp (((struct tui_win_element *)
150
                                  locator->content[0])->which_element.locator.file_name,
151
                                 s->filename) == 0
152
                         && cur_line_no == ((struct tui_win_element *)
153
                                            locator->content[0])->which_element.locator.line_no);
154
                      if (c != EOF)
155
                        {
156
                          i = strlen (src_line) - 1;
157
                          do
158
                            {
159
                              if ((c != '\n') && (c != '\r')
160
                                  && (++i < threshold))
161
                                {
162
                                  if (c < 040 && c != '\t')
163
                                    {
164
                                      src_line[i++] = '^';
165
                                      src_line[i] = c + 0100;
166
                                    }
167
                                  else if (c == 0177)
168
                                    {
169
                                      src_line[i++] = '^';
170
                                      src_line[i] = '?';
171
                                    }
172
                                  else
173
                                    { /* Store the charcter in the
174
                                         line buffer.  If it is a tab,
175
                                         then translate to the correct
176
                                         number of chars so we don't
177
                                         overwrite our buffer.  */
178
                                      if (c == '\t')
179
                                        {
180
                                          int j, max_tab_len = tui_default_tab_len ();
181
 
182
                                          for (j = i - ((i / max_tab_len) * max_tab_len);
183
                                               j < max_tab_len
184
                                                 && i < threshold;
185
                                               i++, j++)
186
                                            src_line[i] = ' ';
187
                                          i--;
188
                                        }
189
                                      else
190
                                        src_line[i] = c;
191
                                    }
192
                                  src_line[i + 1] = 0;
193
                                }
194
                              else
195
                                { /* If we have not reached EOL, then
196
                                     eat chars until we do.  */
197
                                  while (c != EOF && c != '\n' && c != '\r')
198
                                    c = fgetc (stream);
199
                                  /* Handle non-'\n' end-of-line.  */
200
                                  if (c == '\r'
201
                                      && (c = fgetc (stream)) != '\n'
202
                                      && c != EOF)
203
                                    {
204
                                       ungetc (c, stream);
205
                                       c = '\r';
206
                                    }
207
 
208
                                }
209
                            }
210
                          while (c != EOF && c != '\n' && c != '\r'
211
                                 && i < threshold
212
                                 && (c = fgetc (stream)));
213
                        }
214
                      /* Now copy the line taking the offset into
215
                         account.  */
216
                      if (strlen (src_line) > offset)
217
                        strcpy (((struct tui_win_element *) TUI_SRC_WIN->generic.content[
218
                                        cur_line])->which_element.source.line,
219
                                &src_line[offset]);
220
                      else
221
                        ((struct tui_win_element *)
222
                         TUI_SRC_WIN->generic.content[
223
                          cur_line])->which_element.source.line[0] = (char) 0;
224
                      cur_line++;
225
                      cur_line_no++;
226
                    }
227
                  if (offset > 0)
228
                    xfree (src_line);
229
                  fclose (stream);
230
                  TUI_SRC_WIN->generic.content_size = nlines;
231
                  ret = TUI_SUCCESS;
232
                }
233
            }
234
        }
235
    }
236
  return ret;
237
}
238
 
239
 
240
/* elz: This function sets the contents of the source window to empty
241
   except for a line in the middle with a warning message about the
242
   source not being available.  This function is called by
243
   tui_erase_source_contents(), which in turn is invoked when the
244
   source files cannot be accessed.  */
245
 
246
void
247
tui_set_source_content_nil (struct tui_win_info *win_info,
248
                            char *warning_string)
249
{
250
  int line_width;
251
  int n_lines;
252
  int curr_line = 0;
253
 
254
  line_width = win_info->generic.width - 1;
255
  n_lines = win_info->generic.height - 2;
256
 
257
  /* Set to empty each line in the window, except for the one which
258
     contains the message.  */
259
  while (curr_line < win_info->generic.content_size)
260
    {
261
      /* Set the information related to each displayed line to null:
262
         i.e. the line number is 0, there is no bp, it is not where
263
         the program is stopped.  */
264
 
265
      struct tui_win_element *element =
266
        (struct tui_win_element *) win_info->generic.content[curr_line];
267
 
268
      element->which_element.source.line_or_addr.loa = LOA_LINE;
269
      element->which_element.source.line_or_addr.u.line_no = 0;
270
      element->which_element.source.is_exec_point = FALSE;
271
      element->which_element.source.has_break = FALSE;
272
 
273
      /* Set the contents of the line to blank.  */
274
      element->which_element.source.line[0] = (char) 0;
275
 
276
      /* If the current line is in the middle of the screen, then we
277
         want to display the 'no source available' message in it.
278
         Note: the 'weird' arithmetic with the line width and height
279
         comes from the function tui_erase_source_content().  We need
280
         to keep the screen and the window's actual contents in
281
         synch.  */
282
 
283
      if (curr_line == (n_lines / 2 + 1))
284
        {
285
          int i;
286
          int xpos;
287
          int warning_length = strlen (warning_string);
288
          char *src_line;
289
 
290
          src_line = element->which_element.source.line;
291
 
292
          if (warning_length >= ((line_width - 1) / 2))
293
            xpos = 1;
294
          else
295
            xpos = (line_width - 1) / 2 - warning_length;
296
 
297
          for (i = 0; i < xpos; i++)
298
            src_line[i] = ' ';
299
 
300
          sprintf (src_line + i, "%s", warning_string);
301
 
302
          for (i = xpos + warning_length; i < line_width; i++)
303
            src_line[i] = ' ';
304
 
305
          src_line[i] = '\n';
306
 
307
        }                       /* end if */
308
 
309
      curr_line++;
310
 
311
    }                           /* end while */
312
}
313
 
314
 
315
/* Function to display source in the source window.  This function
316
   initializes the horizontal scroll to 0.  */
317
void
318
tui_show_symtab_source (struct gdbarch *gdbarch, struct symtab *s,
319
                        struct tui_line_or_address line,
320
                        int noerror)
321
{
322
  TUI_SRC_WIN->detail.source_info.horizontal_offset = 0;
323
  tui_update_source_window_as_is (TUI_SRC_WIN, gdbarch, s, line, noerror);
324
}
325
 
326
 
327
/* Answer whether the source is currently displayed in the source
328
   window.  */
329
int
330
tui_source_is_displayed (char *fname)
331
{
332
  return (TUI_SRC_WIN->generic.content_in_use
333
          && (strcmp (((struct tui_win_element *) (tui_locator_win_info_ptr ())->
334
                       content[0])->which_element.locator.file_name, fname) == 0));
335
}
336
 
337
 
338
/* Scroll the source forward or backward vertically.  */
339
void
340
tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction,
341
                            int num_to_scroll)
342
{
343
  if (TUI_SRC_WIN->generic.content != NULL)
344
    {
345
      struct tui_line_or_address l;
346
      struct symtab *s;
347
      tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content;
348
      struct symtab_and_line cursal = get_current_source_symtab_and_line ();
349
 
350
      if (cursal.symtab == (struct symtab *) NULL)
351
        s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL)));
352
      else
353
        s = cursal.symtab;
354
 
355
      l.loa = LOA_LINE;
356
      if (scroll_direction == FORWARD_SCROLL)
357
        {
358
          l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
359
            + num_to_scroll;
360
          if (l.u.line_no > s->nlines)
361
            /* line = s->nlines - win_info->generic.content_size + 1; */
362
            /* elz: fix for dts 23398.  */
363
            l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no;
364
        }
365
      else
366
        {
367
          l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
368
            - num_to_scroll;
369
          if (l.u.line_no <= 0)
370
            l.u.line_no = 1;
371
        }
372
 
373
      print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0);
374
    }
375
}

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