diff options
Diffstat (limited to 'contrib/gdb/gdb/tui/tui-source.c')
| -rw-r--r-- | contrib/gdb/gdb/tui/tui-source.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/tui/tui-source.c b/contrib/gdb/gdb/tui/tui-source.c new file mode 100644 index 0000000..d5154b1 --- /dev/null +++ b/contrib/gdb/gdb/tui/tui-source.c @@ -0,0 +1,352 @@ +/* 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); + } +} |
