386 lines
11 KiB
C
386 lines
11 KiB
C
/* TUI display source window.
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Copyright (C) 1998-2015 Free Software Foundation, Inc.
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Contributed by Hewlett-Packard Company.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "breakpoint.h"
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#include "source.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "filenames.h"
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#include "tui/tui.h"
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#include "tui/tui-data.h"
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#include "tui/tui-stack.h"
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#include "tui/tui-winsource.h"
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#include "tui/tui-source.h"
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#include "gdb_curses.h"
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/* Function to display source in the source window. */
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enum tui_status
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tui_set_source_content (struct symtab *s,
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int line_no,
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int noerror)
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{
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enum tui_status ret = TUI_FAILURE;
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if (s != (struct symtab *) NULL)
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{
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FILE *stream;
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int i, desc, c, line_width, nlines;
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char *src_line = 0;
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if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS)
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{
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line_width = TUI_SRC_WIN->generic.width - 1;
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/* Take hilite (window border) into account, when
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calculating the number of lines. */
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nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no;
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desc = open_source_file (s);
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if (desc < 0)
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{
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if (!noerror)
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{
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const char *filename = symtab_to_filename_for_display (s);
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char *name = alloca (strlen (filename) + 100);
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sprintf (name, "%s:%d", filename, line_no);
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print_sys_errmsg (name, errno);
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}
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ret = TUI_FAILURE;
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}
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else
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{
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if (s->line_charpos == 0)
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find_source_lines (s, desc);
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if (line_no < 1 || line_no > s->nlines)
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{
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close (desc);
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printf_unfiltered ("Line number %d out of range; "
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"%s has %d lines.\n",
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line_no,
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symtab_to_filename_for_display (s),
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s->nlines);
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}
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else if (lseek (desc, s->line_charpos[line_no - 1], 0) < 0)
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{
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close (desc);
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perror_with_name (symtab_to_filename_for_display (s));
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}
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else
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{
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int offset, cur_line_no, cur_line, cur_len, threshold;
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struct tui_gen_win_info *locator
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= tui_locator_win_info_ptr ();
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struct tui_source_info *src
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= &TUI_SRC_WIN->detail.source_info;
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const char *s_filename = symtab_to_filename_for_display (s);
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if (TUI_SRC_WIN->generic.title)
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xfree (TUI_SRC_WIN->generic.title);
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TUI_SRC_WIN->generic.title = xstrdup (s_filename);
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xfree (src->fullname);
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src->fullname = xstrdup (symtab_to_fullname (s));
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/* Determine the threshold for the length of the
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line and the offset to start the display. */
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offset = src->horizontal_offset;
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threshold = (line_width - 1) + offset;
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stream = fdopen (desc, FOPEN_RT);
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clearerr (stream);
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cur_line = 0;
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src->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
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src->start_line_or_addr.loa = LOA_LINE;
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cur_line_no = src->start_line_or_addr.u.line_no = line_no;
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if (offset > 0)
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src_line = (char *) xmalloc (
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(threshold + 1) * sizeof (char));
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while (cur_line < nlines)
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{
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struct tui_win_element *element
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= (struct tui_win_element *)
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TUI_SRC_WIN->generic.content[cur_line];
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/* Get the first character in the line. */
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c = fgetc (stream);
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if (offset == 0)
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src_line = ((struct tui_win_element *)
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TUI_SRC_WIN->generic.content[
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cur_line])->which_element.source.line;
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/* Init the line with the line number. */
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sprintf (src_line, "%-6d", cur_line_no);
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cur_len = strlen (src_line);
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i = cur_len - ((cur_len / tui_default_tab_len ())
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* tui_default_tab_len ());
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while (i < tui_default_tab_len ())
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{
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src_line[cur_len] = ' ';
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i++;
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cur_len++;
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}
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src_line[cur_len] = (char) 0;
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/* Set whether element is the execution point
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and whether there is a break point on it. */
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element->which_element.source.line_or_addr.loa =
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LOA_LINE;
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element->which_element.source.line_or_addr.u.line_no =
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cur_line_no;
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element->which_element.source.is_exec_point =
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(filename_cmp (((struct tui_win_element *)
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locator->content[0])->which_element.locator.full_name,
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symtab_to_fullname (s)) == 0
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&& cur_line_no == ((struct tui_win_element *)
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locator->content[0])->which_element.locator.line_no);
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if (c != EOF)
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{
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i = strlen (src_line) - 1;
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do
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{
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if ((c != '\n') && (c != '\r')
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&& (++i < threshold))
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{
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if (c < 040 && c != '\t')
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{
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src_line[i++] = '^';
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src_line[i] = c + 0100;
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}
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else if (c == 0177)
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{
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src_line[i++] = '^';
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src_line[i] = '?';
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}
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else
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{ /* Store the charcter in the
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line buffer. If it is a tab,
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then translate to the correct
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number of chars so we don't
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overwrite our buffer. */
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if (c == '\t')
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{
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int j, max_tab_len
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= tui_default_tab_len ();
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for (j = i - ((i / max_tab_len)
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* max_tab_len);
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j < max_tab_len
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&& i < threshold;
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i++, j++)
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src_line[i] = ' ';
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i--;
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}
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else
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src_line[i] = c;
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}
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src_line[i + 1] = 0;
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}
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else
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{ /* If we have not reached EOL, then
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eat chars until we do. */
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while (c != EOF && c != '\n' && c != '\r')
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c = fgetc (stream);
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/* Handle non-'\n' end-of-line. */
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if (c == '\r'
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&& (c = fgetc (stream)) != '\n'
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&& c != EOF)
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{
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ungetc (c, stream);
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c = '\r';
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}
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}
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}
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while (c != EOF && c != '\n' && c != '\r'
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&& i < threshold
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&& (c = fgetc (stream)));
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}
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/* Now copy the line taking the offset into
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account. */
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if (strlen (src_line) > offset)
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strcpy (((struct tui_win_element *)
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TUI_SRC_WIN->generic.content[cur_line])->which_element.source.line,
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&src_line[offset]);
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else
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((struct tui_win_element *)
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TUI_SRC_WIN->generic.content[
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cur_line])->which_element.source.line[0] = (char) 0;
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cur_line++;
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cur_line_no++;
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}
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if (offset > 0)
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xfree (src_line);
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fclose (stream);
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TUI_SRC_WIN->generic.content_size = nlines;
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ret = TUI_SUCCESS;
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}
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}
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}
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}
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return ret;
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}
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/* elz: This function sets the contents of the source window to empty
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except for a line in the middle with a warning message about the
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source not being available. This function is called by
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tui_erase_source_contents(), which in turn is invoked when the
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source files cannot be accessed. */
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void
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tui_set_source_content_nil (struct tui_win_info *win_info,
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char *warning_string)
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{
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int line_width;
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int n_lines;
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int curr_line = 0;
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line_width = win_info->generic.width - 1;
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n_lines = win_info->generic.height - 2;
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/* Set to empty each line in the window, except for the one which
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contains the message. */
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while (curr_line < win_info->generic.content_size)
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{
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/* Set the information related to each displayed line to null:
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i.e. the line number is 0, there is no bp, it is not where
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the program is stopped. */
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struct tui_win_element *element =
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(struct tui_win_element *) win_info->generic.content[curr_line];
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element->which_element.source.line_or_addr.loa = LOA_LINE;
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element->which_element.source.line_or_addr.u.line_no = 0;
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element->which_element.source.is_exec_point = FALSE;
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element->which_element.source.has_break = FALSE;
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/* Set the contents of the line to blank. */
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element->which_element.source.line[0] = (char) 0;
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/* If the current line is in the middle of the screen, then we
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want to display the 'no source available' message in it.
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Note: the 'weird' arithmetic with the line width and height
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comes from the function tui_erase_source_content(). We need
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to keep the screen and the window's actual contents in
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synch. */
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if (curr_line == (n_lines / 2 + 1))
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{
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int i;
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int xpos;
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int warning_length = strlen (warning_string);
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char *src_line;
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src_line = element->which_element.source.line;
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if (warning_length >= ((line_width - 1) / 2))
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xpos = 1;
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else
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xpos = (line_width - 1) / 2 - warning_length;
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for (i = 0; i < xpos; i++)
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src_line[i] = ' ';
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sprintf (src_line + i, "%s", warning_string);
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for (i = xpos + warning_length; i < line_width; i++)
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src_line[i] = ' ';
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src_line[i] = '\n';
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} /* end if */
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curr_line++;
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} /* end while */
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}
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/* Function to display source in the source window. This function
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initializes the horizontal scroll to 0. */
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void
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tui_show_symtab_source (struct gdbarch *gdbarch, struct symtab *s,
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struct tui_line_or_address line,
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int noerror)
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{
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TUI_SRC_WIN->detail.source_info.horizontal_offset = 0;
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tui_update_source_window_as_is (TUI_SRC_WIN, gdbarch, s, line, noerror);
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}
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/* Answer whether the source is currently displayed in the source
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window. */
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int
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tui_source_is_displayed (const char *fullname)
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{
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return (TUI_SRC_WIN != NULL
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&& TUI_SRC_WIN->generic.content_in_use
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&& (filename_cmp (((struct tui_win_element *)
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(tui_locator_win_info_ptr ())->
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content[0])->which_element.locator.full_name,
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fullname) == 0));
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}
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/* Scroll the source forward or backward vertically. */
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void
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tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction,
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int num_to_scroll)
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{
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if (TUI_SRC_WIN->generic.content != NULL)
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{
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struct tui_line_or_address l;
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struct symtab *s;
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tui_win_content content = (tui_win_content) TUI_SRC_WIN->generic.content;
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struct symtab_and_line cursal = get_current_source_symtab_and_line ();
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if (cursal.symtab == (struct symtab *) NULL)
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s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL)));
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else
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s = cursal.symtab;
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l.loa = LOA_LINE;
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if (scroll_direction == FORWARD_SCROLL)
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{
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l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
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+ num_to_scroll;
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if (l.u.line_no > s->nlines)
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/* line = s->nlines - win_info->generic.content_size + 1; */
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/* elz: fix for dts 23398. */
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l.u.line_no
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= content[0]->which_element.source.line_or_addr.u.line_no;
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}
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else
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{
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l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
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- num_to_scroll;
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if (l.u.line_no <= 0)
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l.u.line_no = 1;
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}
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print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0);
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}
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}
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