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-rw-r--r--gdb/tui/tui-source.c356
1 files changed, 356 insertions, 0 deletions
diff --git a/gdb/tui/tui-source.c b/gdb/tui/tui-source.c
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+++ b/gdb/tui/tui-source.c
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+/* TUI display source window.
+
+ Copyright 1998, 1999, 2000, 2001, 2002, 2003 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"
+
+#ifdef HAVE_NCURSES_H
+#include <ncurses.h>
+#else
+#ifdef HAVE_CURSES_H
+#include <curses.h>
+#endif
+#endif
+
+/* Function to display source in the source window. */
+TuiStatus
+tuiSetSourceContent (struct symtab *s, int lineNo, int noerror)
+{
+ TuiStatus ret = TUI_FAILURE;
+
+ if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
+ {
+ register FILE *stream;
+ register int i, desc, c, lineWidth, nlines;
+ register char *srcLine = 0;
+
+ if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
+ {
+ lineWidth = srcWin->generic.width - 1;
+ /* Take hilite (window border) into account, when calculating
+ the number of lines */
+ nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
+ desc = open_source_file (s);
+ if (desc < 0)
+ {
+ if (!noerror)
+ {
+ char *name = alloca (strlen (s->filename) + 100);
+ sprintf (name, "%s:%d", s->filename, lineNo);
+ print_sys_errmsg (name, errno);
+ }
+ ret = TUI_FAILURE;
+ }
+ else
+ {
+ if (s->line_charpos == 0)
+ find_source_lines (s, desc);
+
+ if (lineNo < 1 || lineNo > s->nlines)
+ {
+ close (desc);
+ printf_unfiltered (
+ "Line number %d out of range; %s has %d lines.\n",
+ lineNo, s->filename, s->nlines);
+ }
+ else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
+ {
+ close (desc);
+ perror_with_name (s->filename);
+ }
+ else
+ {
+ register int offset, curLineNo, curLine, curLen, threshold;
+ TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
+ TuiSourceInfoPtr src = &srcWin->detail.sourceInfo;
+
+ if (srcWin->generic.title)
+ xfree (srcWin->generic.title);
+ srcWin->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->horizontalOffset;
+ threshold = (lineWidth - 1) + offset;
+ stream = fdopen (desc, FOPEN_RT);
+ clearerr (stream);
+ curLine = 0;
+ curLineNo = src->startLineOrAddr.lineNo = lineNo;
+ if (offset > 0)
+ srcLine = (char *) xmalloc (
+ (threshold + 1) * sizeof (char));
+ while (curLine < nlines)
+ {
+ TuiWinElementPtr element = (TuiWinElementPtr)
+ srcWin->generic.content[curLine];
+
+ /* get the first character in the line */
+ c = fgetc (stream);
+
+ if (offset == 0)
+ srcLine = ((TuiWinElementPtr)
+ srcWin->generic.content[
+ curLine])->whichElement.source.line;
+ /* Init the line with the line number */
+ sprintf (srcLine, "%-6d", curLineNo);
+ curLen = strlen (srcLine);
+ i = curLen -
+ ((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
+ while (i < tuiDefaultTabLen ())
+ {
+ srcLine[curLen] = ' ';
+ i++;
+ curLen++;
+ }
+ srcLine[curLen] = (char) 0;
+
+ /* Set whether element is the execution point and
+ whether there is a break point on it. */
+ element->whichElement.source.lineOrAddr.lineNo =
+ curLineNo;
+ element->whichElement.source.isExecPoint =
+ (strcmp (((TuiWinElementPtr)
+ locator->content[0])->whichElement.locator.fileName,
+ s->filename) == 0
+ && curLineNo == ((TuiWinElementPtr)
+ locator->content[0])->whichElement.locator.lineNo);
+ if (c != EOF)
+ {
+ i = strlen (srcLine) - 1;
+ do
+ {
+ if ((c != '\n') &&
+ (c != '\r') && (++i < threshold))
+ {
+ if (c < 040 && c != '\t')
+ {
+ srcLine[i++] = '^';
+ srcLine[i] = c + 0100;
+ }
+ else if (c == 0177)
+ {
+ srcLine[i++] = '^';
+ srcLine[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, maxTabLen = tuiDefaultTabLen ();
+
+ for (j = i - (
+ (i / maxTabLen) * maxTabLen);
+ ((j < maxTabLen) &&
+ i < threshold);
+ i++, j++)
+ srcLine[i] = ' ';
+ i--;
+ }
+ else
+ srcLine[i] = c;
+ }
+ srcLine[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 (srcLine) > offset)
+ strcpy (((TuiWinElementPtr) srcWin->generic.content[
+ curLine])->whichElement.source.line,
+ &srcLine[offset]);
+ else
+ ((TuiWinElementPtr)
+ srcWin->generic.content[
+ curLine])->whichElement.source.line[0] = (char) 0;
+ curLine++;
+ curLineNo++;
+ }
+ if (offset > 0)
+ tuiFree (srcLine);
+ fclose (stream);
+ srcWin->generic.contentSize = 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
+ tuiEraseSourceContents, which in turn is invoked when the source files
+ cannot be accessed */
+
+void
+tuiSetSourceContentNil (TuiWinInfoPtr winInfo, char *warning_string)
+{
+ int lineWidth;
+ int nLines;
+ int curr_line = 0;
+
+ lineWidth = winInfo->generic.width - 1;
+ nLines = winInfo->generic.height - 2;
+
+ /* set to empty each line in the window, except for the one
+ which contains the message */
+ while (curr_line < winInfo->generic.contentSize)
+ {
+ /* 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 */
+
+ TuiWinElementPtr element =
+ (TuiWinElementPtr) winInfo->generic.content[curr_line];
+ element->whichElement.source.lineOrAddr.lineNo = 0;
+ element->whichElement.source.isExecPoint = FALSE;
+ element->whichElement.source.hasBreak = FALSE;
+
+ /* set the contents of the line to blank */
+ element->whichElement.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 tuiEraseSourceContent. We need to keep the screen and the
+ window's actual contents in synch */
+
+ if (curr_line == (nLines / 2 + 1))
+ {
+ int i;
+ int xpos;
+ int warning_length = strlen (warning_string);
+ char *srcLine;
+
+ srcLine = element->whichElement.source.line;
+
+ if (warning_length >= ((lineWidth - 1) / 2))
+ xpos = 1;
+ else
+ xpos = (lineWidth - 1) / 2 - warning_length;
+
+ for (i = 0; i < xpos; i++)
+ srcLine[i] = ' ';
+
+ sprintf (srcLine + i, "%s", warning_string);
+
+ for (i = xpos + warning_length; i < lineWidth; i++)
+ srcLine[i] = ' ';
+
+ srcLine[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
+tuiShowSource (struct symtab *s, TuiLineOrAddress line, int noerror)
+{
+ srcWin->detail.sourceInfo.horizontalOffset = 0;
+ tuiUpdateSourceWindowAsIs(srcWin, s, line, noerror);
+}
+
+
+/* Answer whether the source is currently displayed in the source window. */
+int
+tuiSourceIsDisplayed (char *fname)
+{
+ return (srcWin->generic.contentInUse &&
+ (strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
+ content[0])->whichElement.locator.fileName, fname) == 0));
+}
+
+
+/* Scroll the source forward or backward vertically. */
+void
+tuiVerticalSourceScroll (TuiScrollDirection scrollDirection,
+ int numToScroll)
+{
+ if (srcWin->generic.content != (OpaquePtr) NULL)
+ {
+ TuiLineOrAddress l;
+ struct symtab *s;
+ TuiWinContent content = (TuiWinContent) srcWin->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 (scrollDirection == FORWARD_SCROLL)
+ {
+ l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo +
+ numToScroll;
+ if (l.lineNo > s->nlines)
+ /*line = s->nlines - winInfo->generic.contentSize + 1; */
+ /*elz: fix for dts 23398 */
+ l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo;
+ }
+ else
+ {
+ l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo -
+ numToScroll;
+ if (l.lineNo <= 0)
+ l.lineNo = 1;
+ }
+
+ print_source_lines (s, l.lineNo, l.lineNo + 1, 0);
+ }
+}
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