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binutils-gdb/gdb/tui/tuiSource.c
Andrew Cagney f33c6cbfe5 Add FIXME explaining include problem.
2002-03-01 06:19:28 +00:00

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/* TUI display source window.
Copyright 1998, 1999, 2000, 2001, 2002 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. */
/* FIXME: cagney/2002-02-28: The GDB coding standard indicates that
"defs.h" should be included first. Unfortunatly some systems
(currently Debian GNU/Linux) include the <stdbool.h> via <curses.h>
and they clash with "bfd.h"'s definiton of true/false. The correct
fix is to remove true/false from "bfd.h", however, until that
happens, hack around it by including "config.h" and <curses.h>
first. */
#include "config.h"
#ifdef HAVE_NCURSES_H
#include <ncurses.h>
#else
#ifdef HAVE_CURSES_H
#include <curses.h>
#endif
#endif
#include "defs.h"
#include <ctype.h>
#include "symtab.h"
#include "frame.h"
#include "breakpoint.h"
#include "source.h"
#include "symtab.h"
#include "tui.h"
#include "tuiData.h"
#include "tuiStack.h"
#include "tuiSourceWin.h"
#include "tuiSource.h"
/*****************************************
** EXTERNAL DATA DECLS **
******************************************/
extern int current_source_line;
extern struct symtab *current_source_symtab;
/*****************************************
** STATIC LOCAL FUNCTIONS FORWARD DECLS **
******************************************/
static struct breakpoint *_hasBreak (char *, int);
/*****************************************
** STATIC LOCAL DATA **
******************************************/
/*****************************************
** PUBLIC FUNCTIONS **
******************************************/
/*********************************
** SOURCE/DISASSEM FUNCTIONS **
*********************************/
/*
** tuiSetSourceContent().
** 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;
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 ();
/*
** Determine the threshold for the length of the line
** and the offset to start the display
*/
offset = srcWin->detail.sourceInfo.horizontalOffset;
threshold = (lineWidth - 1) + offset;
stream = fdopen (desc, FOPEN_RT);
clearerr (stream);
curLine = 0;
curLineNo =
srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
if (offset > 0)
srcLine = (char *) xmalloc (
(threshold + 1) * sizeof (char));
while (curLine < nlines)
{
TuiWinElementPtr element = (TuiWinElementPtr)
srcWin->generic.content[curLine];
struct breakpoint *bp;
/* 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);
bp = _hasBreak (s->filename, curLineNo);
element->whichElement.source.hasBreak =
(bp != (struct breakpoint *) NULL &&
(!element->whichElement.source.isExecPoint ||
(bp->disposition != disp_del || bp->hit_count <= 0)));
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;
} /* tuiSetSourceContent */
/* 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 */
} /*tuiSetSourceContentNil */
/*
** tuiShowSource().
** 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);
return;
} /* tuiShowSource */
/*
** tuiSourceIsDisplayed().
** 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));
} /* tuiSourceIsDisplayed */
/*
** tuiVerticalSourceScroll().
** 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;
if (current_source_symtab == (struct symtab *) NULL)
s = find_pc_symtab (selected_frame->pc);
else
s = current_source_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;
}
if (identify_source_line (s, l.lineNo, 0, -1) == 1)
tuiUpdateSourceWindowAsIs (srcWin, s, l, FALSE);
}
return;
} /* tuiVerticalSourceScroll */
/*****************************************
** STATIC LOCAL FUNCTIONS **
******************************************/
/*
** _hasBreak().
** Answer whether there is a break point at the input line in
** the source file indicated
*/
static struct breakpoint *
_hasBreak (char *sourceFileName, int lineNo)
{
struct breakpoint *bpWithBreak = (struct breakpoint *) NULL;
struct breakpoint *bp;
extern struct breakpoint *breakpoint_chain;
for (bp = breakpoint_chain;
(bp != (struct breakpoint *) NULL &&
bpWithBreak == (struct breakpoint *) NULL);
bp = bp->next)
if (bp->source_file
&& (strcmp (sourceFileName, bp->source_file) == 0)
&& (lineNo == bp->line_number))
bpWithBreak = bp;
return bpWithBreak;
} /* _hasBreak */
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