| Current Path : /usr/src/contrib/gdb/gdb/tui/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/gdb/gdb/tui/tui-source.c |
/* TUI display source window.
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
Foundation, Inc.
Contributed by Hewlett-Packard Company.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include <ctype.h>
#include "symtab.h"
#include "frame.h"
#include "breakpoint.h"
#include "source.h"
#include "symtab.h"
#include "tui/tui.h"
#include "tui/tui-data.h"
#include "tui/tui-stack.h"
#include "tui/tui-winsource.h"
#include "tui/tui-source.h"
#include "gdb_string.h"
#include "gdb_curses.h"
/* Function to display source in the source window. */
enum tui_status
tui_set_source_content (struct symtab *s, int line_no, int noerror)
{
enum tui_status ret = TUI_FAILURE;
if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
{
FILE *stream;
int i, desc, c, line_width, nlines;
char *src_line = 0;
if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
{
line_width = TUI_SRC_WIN->generic.width - 1;
/* Take hilite (window border) into account, when calculating
the number of lines */
nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no;
desc = open_source_file (s);
if (desc < 0)
{
if (!noerror)
{
char *name = alloca (strlen (s->filename) + 100);
sprintf (name, "%s:%d", s->filename, line_no);
print_sys_errmsg (name, errno);
}
ret = TUI_FAILURE;
}
else
{
if (s->line_charpos == 0)
find_source_lines (s, desc);
if (line_no < 1 || line_no > s->nlines)
{
close (desc);
printf_unfiltered (
"Line number %d out of range; %s has %d lines.\n",
line_no, s->filename, s->nlines);
}
else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0)
{
close (desc);
perror_with_name (s->filename);
}
else
{
int offset, cur_line_no, cur_line, cur_len, threshold;
struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
struct tui_source_info * src = &TUI_SRC_WIN->detail.source_info;
if (TUI_SRC_WIN->generic.title)
xfree (TUI_SRC_WIN->generic.title);
TUI_SRC_WIN->generic.title = xstrdup (s->filename);
if (src->filename)
xfree (src->filename);
src->filename = xstrdup (s->filename);
/* Determine the threshold for the length of the line
and the offset to start the display. */
offset = src->horizontal_offset;
threshold = (line_width - 1) + offset;
stream = fdopen (desc, FOPEN_RT);
clearerr (stream);
cur_line = 0;
cur_line_no = src->start_line_or_addr.line_no = line_no;
if (offset > 0)
src_line = (char *) xmalloc (
(threshold + 1) * sizeof (char));
while (cur_line < nlines)
{
struct tui_win_element * element = (struct tui_win_element *)
TUI_SRC_WIN->generic.content[cur_line];
/* get the first character in the line */
c = fgetc (stream);
if (offset == 0)
src_line = ((struct tui_win_element *)
TUI_SRC_WIN->generic.content[
cur_line])->which_element.source.line;
/* Init the line with the line number */
sprintf (src_line, "%-6d", cur_line_no);
cur_len = strlen (src_line);
i = cur_len -
((cur_len / tui_default_tab_len ()) * tui_default_tab_len ());
while (i < tui_default_tab_len ())
{
src_line[cur_len] = ' ';
i++;
cur_len++;
}
src_line[cur_len] = (char) 0;
/* Set whether element is the execution point and
whether there is a break point on it. */
element->which_element.source.line_or_addr.line_no =
cur_line_no;
element->which_element.source.is_exec_point =
(strcmp (((struct tui_win_element *)
locator->content[0])->which_element.locator.file_name,
s->filename) == 0
&& cur_line_no == ((struct tui_win_element *)
locator->content[0])->which_element.locator.line_no);
if (c != EOF)
{
i = strlen (src_line) - 1;
do
{
if ((c != '\n') &&
(c != '\r') && (++i < threshold))
{
if (c < 040 && c != '\t')
{
src_line[i++] = '^';
src_line[i] = c + 0100;
}
else if (c == 0177)
{
src_line[i++] = '^';
src_line[i] = '?';
}
else
{ /* Store the charcter in the line
buffer. If it is a tab, then
translate to the correct number of
chars so we don't overwrite our
buffer. */
if (c == '\t')
{
int j, max_tab_len = tui_default_tab_len ();
for (j = i - (
(i / max_tab_len) * max_tab_len);
((j < max_tab_len) &&
i < threshold);
i++, j++)
src_line[i] = ' ';
i--;
}
else
src_line[i] = c;
}
src_line[i + 1] = 0;
}
else
{ /* If we have not reached EOL, then eat
chars until we do */
while (c != EOF && c != '\n' && c != '\r')
c = fgetc (stream);
}
}
while (c != EOF && c != '\n' && c != '\r' &&
i < threshold && (c = fgetc (stream)));
}
/* Now copy the line taking the offset into account */
if (strlen (src_line) > offset)
strcpy (((struct tui_win_element *) TUI_SRC_WIN->generic.content[
cur_line])->which_element.source.line,
&src_line[offset]);
else
((struct tui_win_element *)
TUI_SRC_WIN->generic.content[
cur_line])->which_element.source.line[0] = (char) 0;
cur_line++;
cur_line_no++;
}
if (offset > 0)
xfree (src_line);
fclose (stream);
TUI_SRC_WIN->generic.content_size = nlines;
ret = TUI_SUCCESS;
}
}
}
}
return ret;
}
/* elz: this function sets the contents of the source window to empty
except for a line in the middle with a warning message about the
source not being available. This function is called by
tui_erase_source_contents(), which in turn is invoked when the
source files cannot be accessed. */
void
tui_set_source_content_nil (struct tui_win_info * win_info, char *warning_string)
{
int line_width;
int n_lines;
int curr_line = 0;
line_width = win_info->generic.width - 1;
n_lines = win_info->generic.height - 2;
/* set to empty each line in the window, except for the one
which contains the message */
while (curr_line < win_info->generic.content_size)
{
/* set the information related to each displayed line
to null: i.e. the line number is 0, there is no bp,
it is not where the program is stopped */
struct tui_win_element * element =
(struct tui_win_element *) win_info->generic.content[curr_line];
element->which_element.source.line_or_addr.line_no = 0;
element->which_element.source.is_exec_point = FALSE;
element->which_element.source.has_break = FALSE;
/* set the contents of the line to blank */
element->which_element.source.line[0] = (char) 0;
/* if the current line is in the middle of the screen, then we
want to display the 'no source available' message in it.
Note: the 'weird' arithmetic with the line width and height
comes from the function tui_erase_source_content(). We need
to keep the screen and the window's actual contents in synch. */
if (curr_line == (n_lines / 2 + 1))
{
int i;
int xpos;
int warning_length = strlen (warning_string);
char *src_line;
src_line = element->which_element.source.line;
if (warning_length >= ((line_width - 1) / 2))
xpos = 1;
else
xpos = (line_width - 1) / 2 - warning_length;
for (i = 0; i < xpos; i++)
src_line[i] = ' ';
sprintf (src_line + i, "%s", warning_string);
for (i = xpos + warning_length; i < line_width; i++)
src_line[i] = ' ';
src_line[i] = '\n';
} /* end if */
curr_line++;
} /* end while */
}
/* Function to display source in the source window. This function
initializes the horizontal scroll to 0. */
void
tui_show_symtab_source (struct symtab *s, union tui_line_or_address line, int noerror)
{
TUI_SRC_WIN->detail.source_info.horizontal_offset = 0;
tui_update_source_window_as_is (TUI_SRC_WIN, s, line, noerror);
}
/* Answer whether the source is currently displayed in the source
window. */
int
tui_source_is_displayed (char *fname)
{
return (TUI_SRC_WIN->generic.content_in_use &&
(strcmp (((struct tui_win_element *) (tui_locator_win_info_ptr ())->
content[0])->which_element.locator.file_name, fname) == 0));
}
/* Scroll the source forward or backward vertically. */
void
tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction,
int num_to_scroll)
{
if (TUI_SRC_WIN->generic.content != NULL)
{
union tui_line_or_address l;
struct symtab *s;
tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content;
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
if (cursal.symtab == (struct symtab *) NULL)
s = find_pc_symtab (get_frame_pc (deprecated_selected_frame));
else
s = cursal.symtab;
if (scroll_direction == FORWARD_SCROLL)
{
l.line_no = content[0]->which_element.source.line_or_addr.line_no +
num_to_scroll;
if (l.line_no > s->nlines)
/*line = s->nlines - win_info->generic.content_size + 1; */
/*elz: fix for dts 23398 */
l.line_no = content[0]->which_element.source.line_or_addr.line_no;
}
else
{
l.line_no = content[0]->which_element.source.line_or_addr.line_no -
num_to_scroll;
if (l.line_no <= 0)
l.line_no = 1;
}
print_source_lines (s, l.line_no, l.line_no + 1, 0);
}
}