| /* TUI display source window. |
| |
| Copyright (C) 1998-2004, 2007-2012 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include "symtab.h" |
| #include "frame.h" |
| #include "breakpoint.h" |
| #include "source.h" |
| #include "symtab.h" |
| #include "objfiles.h" |
| #include "filenames.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; |
| src->gdbarch = get_objfile_arch (s->objfile); |
| src->start_line_or_addr.loa = LOA_LINE; |
| cur_line_no = src->start_line_or_addr.u.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.loa = |
| LOA_LINE; |
| element->which_element.source.line_or_addr.u.line_no = |
| cur_line_no; |
| element->which_element.source.is_exec_point = |
| (filename_cmp (((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); |
| /* Handle non-'\n' end-of-line. */ |
| if (c == '\r' |
| && (c = fgetc (stream)) != '\n' |
| && c != EOF) |
| { |
| ungetc (c, stream); |
| c = '\r'; |
| } |
| |
| } |
| } |
| 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.loa = LOA_LINE; |
| element->which_element.source.line_or_addr.u.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 gdbarch *gdbarch, struct symtab *s, |
| struct 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, gdbarch, 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 |
| && (filename_cmp (((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) |
| { |
| struct 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 (get_selected_frame (NULL))); |
| else |
| s = cursal.symtab; |
| |
| l.loa = LOA_LINE; |
| if (scroll_direction == FORWARD_SCROLL) |
| { |
| l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no |
| + num_to_scroll; |
| if (l.u.line_no > s->nlines) |
| /* line = s->nlines - win_info->generic.content_size + 1; */ |
| /* elz: fix for dts 23398. */ |
| l.u.line_no |
| = content[0]->which_element.source.line_or_addr.u.line_no; |
| } |
| else |
| { |
| l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no |
| - num_to_scroll; |
| if (l.u.line_no <= 0) |
| l.u.line_no = 1; |
| } |
| |
| print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); |
| } |
| } |
