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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [tui/] [tui-source.c] - Blame information for rev 157

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Line No. Rev Author Line
1 24 jeremybenn
/* TUI display source window.
2
 
3
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
4
   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
 
31
#include "tui/tui.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"
36
 
37
#include "gdb_string.h"
38
#include "gdb_curses.h"
39
 
40
/* Function to display source in the source window.  */
41
enum tui_status
42
tui_set_source_content (struct symtab *s,
43
                        int line_no,
44
                        int noerror)
45
{
46
  enum tui_status ret = TUI_FAILURE;
47
 
48
  if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
49
    {
50
      FILE *stream;
51
      int i, desc, c, line_width, nlines;
52
      char *src_line = 0;
53
 
54
      if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
55
        {
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);
61
          if (desc < 0)
62
            {
63
              if (!noerror)
64
                {
65
                  char *name = alloca (strlen (s->filename) + 100);
66
                  sprintf (name, "%s:%d", s->filename, line_no);
67
                  print_sys_errmsg (name, errno);
68
                }
69
              ret = TUI_FAILURE;
70
            }
71
          else
72
            {
73
              if (s->line_charpos == 0)
74
                find_source_lines (s, desc);
75
 
76
              if (line_no < 1 || line_no > s->nlines)
77
                {
78
                  close (desc);
79
                  printf_unfiltered (
80
                          "Line number %d out of range; %s has %d lines.\n",
81
                                      line_no, s->filename, s->nlines);
82
                }
83
              else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0)
84
                {
85
                  close (desc);
86
                  perror_with_name (s->filename);
87
                }
88
              else
89
                {
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;
93
 
94
                  if (TUI_SRC_WIN->generic.title)
95
                    xfree (TUI_SRC_WIN->generic.title);
96
                  TUI_SRC_WIN->generic.title = xstrdup (s->filename);
97
 
98
                  if (src->filename)
99
                    xfree (src->filename);
100
                  src->filename = xstrdup (s->filename);
101
 
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);
107
                  clearerr (stream);
108
                  cur_line = 0;
109
                  src->start_line_or_addr.loa = LOA_LINE;
110
                  cur_line_no = src->start_line_or_addr.u.line_no = line_no;
111
                  if (offset > 0)
112
                    src_line = (char *) xmalloc (
113
                                           (threshold + 1) * sizeof (char));
114
                  while (cur_line < nlines)
115
                    {
116
                      struct tui_win_element *element = (struct tui_win_element *)
117
                      TUI_SRC_WIN->generic.content[cur_line];
118
 
119
                      /* Get the first character in the line.  */
120
                      c = fgetc (stream);
121
 
122
                      if (offset == 0)
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);
129
                      i = cur_len -
130
                        ((cur_len / tui_default_tab_len ()) * tui_default_tab_len ());
131
                      while (i < tui_default_tab_len ())
132
                        {
133
                          src_line[cur_len] = ' ';
134
                          i++;
135
                          cur_len++;
136
                        }
137
                      src_line[cur_len] = (char) 0;
138
 
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 =
142
                        LOA_LINE;
143
                      element->which_element.source.line_or_addr.u.line_no =
144
                        cur_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,
148
                                 s->filename) == 0
149
                         && cur_line_no == ((struct tui_win_element *)
150
                                            locator->content[0])->which_element.locator.line_no);
151
                      if (c != EOF)
152
                        {
153
                          i = strlen (src_line) - 1;
154
                          do
155
                            {
156
                              if ((c != '\n') && (c != '\r')
157
                                  && (++i < threshold))
158
                                {
159
                                  if (c < 040 && c != '\t')
160
                                    {
161
                                      src_line[i++] = '^';
162
                                      src_line[i] = c + 0100;
163
                                    }
164
                                  else if (c == 0177)
165
                                    {
166
                                      src_line[i++] = '^';
167
                                      src_line[i] = '?';
168
                                    }
169
                                  else
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.  */
175
                                      if (c == '\t')
176
                                        {
177
                                          int j, max_tab_len = tui_default_tab_len ();
178
 
179
                                          for (j = i - ((i / max_tab_len) * max_tab_len);
180
                                               j < max_tab_len
181
                                                 && i < threshold;
182
                                               i++, j++)
183
                                            src_line[i] = ' ';
184
                                          i--;
185
                                        }
186
                                      else
187
                                        src_line[i] = c;
188
                                    }
189
                                  src_line[i + 1] = 0;
190
                                }
191
                              else
192
                                { /* If we have not reached EOL, then
193
                                     eat chars until we do.  */
194
                                  while (c != EOF && c != '\n' && c != '\r')
195
                                    c = fgetc (stream);
196
                                  /* Handle non-'\n' end-of-line.  */
197
                                  if (c == '\r'
198
                                      && (c = fgetc (stream)) != '\n'
199
                                      && c != EOF)
200
                                    {
201
                                       ungetc (c, stream);
202
                                       c = '\r';
203
                                    }
204
 
205
                                }
206
                            }
207
                          while (c != EOF && c != '\n' && c != '\r'
208
                                 && i < threshold
209
                                 && (c = fgetc (stream)));
210
                        }
211
                      /* Now copy the line taking the offset into
212
                         account.  */
213
                      if (strlen (src_line) > offset)
214
                        strcpy (((struct tui_win_element *) TUI_SRC_WIN->generic.content[
215
                                        cur_line])->which_element.source.line,
216
                                &src_line[offset]);
217
                      else
218
                        ((struct tui_win_element *)
219
                         TUI_SRC_WIN->generic.content[
220
                          cur_line])->which_element.source.line[0] = (char) 0;
221
                      cur_line++;
222
                      cur_line_no++;
223
                    }
224
                  if (offset > 0)
225
                    xfree (src_line);
226
                  fclose (stream);
227
                  TUI_SRC_WIN->generic.content_size = nlines;
228
                  ret = TUI_SUCCESS;
229
                }
230
            }
231
        }
232
    }
233
  return ret;
234
}
235
 
236
 
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.  */
242
 
243
void
244
tui_set_source_content_nil (struct tui_win_info *win_info,
245
                            char *warning_string)
246
{
247
  int line_width;
248
  int n_lines;
249
  int curr_line = 0;
250
 
251
  line_width = win_info->generic.width - 1;
252
  n_lines = win_info->generic.height - 2;
253
 
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)
257
    {
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.  */
261
 
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;
268
 
269
      /* Set the contents of the line to blank.  */
270
      element->which_element.source.line[0] = (char) 0;
271
 
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
277
         synch.  */
278
 
279
      if (curr_line == (n_lines / 2 + 1))
280
        {
281
          int i;
282
          int xpos;
283
          int warning_length = strlen (warning_string);
284
          char *src_line;
285
 
286
          src_line = element->which_element.source.line;
287
 
288
          if (warning_length >= ((line_width - 1) / 2))
289
            xpos = 1;
290
          else
291
            xpos = (line_width - 1) / 2 - warning_length;
292
 
293
          for (i = 0; i < xpos; i++)
294
            src_line[i] = ' ';
295
 
296
          sprintf (src_line + i, "%s", warning_string);
297
 
298
          for (i = xpos + warning_length; i < line_width; i++)
299
            src_line[i] = ' ';
300
 
301
          src_line[i] = '\n';
302
 
303
        }                       /* end if */
304
 
305
      curr_line++;
306
 
307
    }                           /* end while */
308
}
309
 
310
 
311
/* Function to display source in the source window.  This function
312
   initializes the horizontal scroll to 0.  */
313
void
314
tui_show_symtab_source (struct symtab *s,
315
                        struct tui_line_or_address line,
316
                        int noerror)
317
{
318
  TUI_SRC_WIN->detail.source_info.horizontal_offset = 0;
319
  tui_update_source_window_as_is (TUI_SRC_WIN, s, line, noerror);
320
}
321
 
322
 
323
/* Answer whether the source is currently displayed in the source
324
   window.  */
325
int
326
tui_source_is_displayed (char *fname)
327
{
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));
331
}
332
 
333
 
334
/* Scroll the source forward or backward vertically.  */
335
void
336
tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction,
337
                            int num_to_scroll)
338
{
339
  if (TUI_SRC_WIN->generic.content != NULL)
340
    {
341
      struct tui_line_or_address l;
342
      struct symtab *s;
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 ();
345
 
346
      if (cursal.symtab == (struct symtab *) NULL)
347
        s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL)));
348
      else
349
        s = cursal.symtab;
350
 
351
      l.loa = LOA_LINE;
352
      if (scroll_direction == FORWARD_SCROLL)
353
        {
354
          l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
355
            + num_to_scroll;
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;
360
        }
361
      else
362
        {
363
          l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
364
            - num_to_scroll;
365
          if (l.u.line_no <= 0)
366
            l.u.line_no = 1;
367
        }
368
 
369
      print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0);
370
    }
371
}

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