[thirdparty/binutils-gdb.git] / gdb / tui / tuiSource.c

/* TUI display source window.
   Copyright 1998, 1999, 2000, 2001 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 "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 != 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, Opaque line, int noerror)
{
  srcWin->detail.sourceInfo.horizontalOffset = 0;
  m_tuiShowSourceAsIs (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)
    {
      int line;
      Opaque addr;
      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)
	{
	  line = content[0]->whichElement.source.lineOrAddr.lineNo +
	    numToScroll;
	  if (line > s->nlines)
	    /*line = s->nlines - winInfo->generic.contentSize + 1; */
	    /*elz: fix for dts 23398 */
	    line = content[0]->whichElement.source.lineOrAddr.lineNo;
	}
      else
	{
	  line = content[0]->whichElement.source.lineOrAddr.lineNo -
	    numToScroll;
	  if (line <= 0)
	    line = 1;
	}
      tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, 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 */
Commit	Line	Data
f377b406 SC	1	/* TUI display source window.
	2	Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
	3	Contributed by Hewlett-Packard Company.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
c906108c SS	21
	22	#include "defs.h"
	23	#include <ctype.h>
	24	#include "symtab.h"
	25	#include "frame.h"
	26	#include "breakpoint.h"
c2c6d25f	27	#include "source.h"
c906108c SS	28
	29	#include "tui.h"
	30	#include "tuiData.h"
	31	#include "tuiStack.h"
	32	#include "tuiSourceWin.h"
	33	#include "tuiSource.h"
	34
	35
c906108c SS	36	/*****************************************
	37	EXTERNAL DATA DECLS
	38	******************************************/
	39	extern int current_source_line;
	40	extern struct symtab *current_source_symtab;
	41
	42
	43	/*****************************************
	44	STATIC LOCAL FUNCTIONS FORWARD DECLS
	45	******************************************/
	46
a14ed312	47	static struct breakpoint _hasBreak (char , int);
c906108c SS	48
	49
	50	/*****************************************
	51	STATIC LOCAL DATA
	52	******************************************/
	53
	54
	55	/*****************************************
	56	PUBLIC FUNCTIONS
	57	******************************************/
	58
	59	/*********************************
	60	SOURCE/DISASSEM FUNCTIONS
	61	*********************************/
	62
	63	/*
c5aa993b JM	64	** tuiSetSourceContent().
	65	** Function to display source in the source window.
	66	*/
c906108c	67	TuiStatus
eca6576c	68	tuiSetSourceContent (struct symtab *s, int lineNo, int noerror)
c906108c SS	69	{
	70	TuiStatus ret = TUI_FAILURE;
	71
	72	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
	73	{
	74	register FILE *stream;
	75	register int i, desc, c, lineWidth, nlines;
	76	register char *srcLine;
	77
	78	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
	79	{
	80	lineWidth = srcWin->generic.width - 1;
	81	/*
c5aa993b JM	82	** Take hilite (window border) into account, when calculating
	83	** the number of lines
	84	*/
c906108c SS	85	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
	86	desc = open_source_file (s);
	87	if (desc < 0)
	88	{
	89	if (!noerror)
	90	{
	91	char *name = alloca (strlen (s->filename) + 100);
	92	sprintf (name, "%s:%d", s->filename, lineNo);
	93	print_sys_errmsg (name, errno);
	94	}
	95	ret = TUI_FAILURE;
	96	}
	97	else
	98	{
	99	if (s->line_charpos == 0)
	100	find_source_lines (s, desc);
	101
	102	if (lineNo < 1 \|\| lineNo > s->nlines)
	103	{
	104	close (desc);
	105	printf_unfiltered (
	106	"Line number %d out of range; %s has %d lines.\n",
	107	lineNo, s->filename, s->nlines);
	108	}
	109	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
	110	{
	111	close (desc);
	112	perror_with_name (s->filename);
	113	}
	114	else
	115	{
	116	register int offset, curLineNo, curLine, curLen, threshold;
	117	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
	118	/*
c5aa993b JM	119	** Determine the threshold for the length of the line
	120	** and the offset to start the display
	121	*/
c906108c SS	122	offset = srcWin->detail.sourceInfo.horizontalOffset;
	123	threshold = (lineWidth - 1) + offset;
	124	stream = fdopen (desc, FOPEN_RT);
	125	clearerr (stream);
	126	curLine = 0;
	127	curLineNo =
	128	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
	129	if (offset > 0)
	130	srcLine = (char *) xmalloc (
	131	(threshold + 1) * sizeof (char));
	132	while (curLine < nlines)
	133	{
	134	TuiWinElementPtr element = (TuiWinElementPtr)
	135	srcWin->generic.content[curLine];
	136	struct breakpoint *bp;
	137
	138	/* get the first character in the line */
	139	c = fgetc (stream);
	140
	141	if (offset == 0)
	142	srcLine = ((TuiWinElementPtr)
	143	srcWin->generic.content[
	144	curLine])->whichElement.source.line;
	145	/* Init the line with the line number */
	146	sprintf (srcLine, "%-6d", curLineNo);
	147	curLen = strlen (srcLine);
	148	i = curLen -
	149	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
	150	while (i < tuiDefaultTabLen ())
	151	{
	152	srcLine[curLen] = ' ';
	153	i++;
	154	curLen++;
	155	}
	156	srcLine[curLen] = (char) 0;
	157
	158	/*
c5aa993b JM	159	** Set whether element is the execution point and
	160	** whether there is a break point on it.
	161	*/
c906108c SS	162	element->whichElement.source.lineOrAddr.lineNo =
	163	curLineNo;
	164	element->whichElement.source.isExecPoint =
	165	(strcmp (((TuiWinElementPtr)
	166	locator->content[0])->whichElement.locator.fileName,
	167	s->filename) == 0
	168	&& curLineNo == ((TuiWinElementPtr)
	169	locator->content[0])->whichElement.locator.lineNo);
	170	bp = _hasBreak (s->filename, curLineNo);
	171	element->whichElement.source.hasBreak =
	172	(bp != (struct breakpoint *) NULL &&
	173	(!element->whichElement.source.isExecPoint \|\|
	174	(bp->disposition != del \|\| bp->hit_count <= 0)));
	175	if (c != EOF)
	176	{
	177	i = strlen (srcLine) - 1;
	178	do
	179	{
	180	if ((c != '\n') &&
	181	(c != '\r') && (++i < threshold))
	182	{
	183	if (c < 040 && c != '\t')
	184	{
	185	srcLine[i++] = '^';
	186	srcLine[i] = c + 0100;
	187	}
	188	else if (c == 0177)
	189	{
	190	srcLine[i++] = '^';
	191	srcLine[i] = '?';
	192	}
	193	else
	194	{ /*
c5aa993b JM	195	** Store the charcter in the line
	196	** buffer. If it is a tab, then
	197	** translate to the correct number of
	198	** chars so we don't overwrite our
	199	** buffer.
	200	*/
c906108c SS	201	if (c == '\t')
	202	{
	203	int j, maxTabLen = tuiDefaultTabLen ();
	204
	205	for (j = i - (
	206	(i / maxTabLen) * maxTabLen);
	207	((j < maxTabLen) &&
	208	i < threshold);
	209	i++, j++)
	210	srcLine[i] = ' ';
	211	i--;
	212	}
	213	else
	214	srcLine[i] = c;
	215	}
	216	srcLine[i + 1] = 0;
	217	}
	218	else
	219	{ /*
c5aa993b JM	220	** if we have not reached EOL, then eat
	221	** chars until we do
	222	*/
c906108c SS	223	while (c != EOF && c != '\n' && c != '\r')
	224	c = fgetc (stream);
	225	}
	226	}
	227	while (c != EOF && c != '\n' && c != '\r' &&
	228	i < threshold && (c = fgetc (stream)));
	229	}
	230	/* Now copy the line taking the offset into account */
	231	if (strlen (srcLine) > offset)
	232	strcpy (((TuiWinElementPtr) srcWin->generic.content[
	233	curLine])->whichElement.source.line,
	234	&srcLine[offset]);
	235	else
	236	((TuiWinElementPtr)
	237	srcWin->generic.content[
	238	curLine])->whichElement.source.line[0] = (char) 0;
	239	curLine++;
	240	curLineNo++;
	241	}
	242	if (offset > 0)
	243	tuiFree (srcLine);
	244	fclose (stream);
	245	srcWin->generic.contentSize = nlines;
	246	ret = TUI_SUCCESS;
	247	}
	248	}
	249	}
	250	}
	251	return ret;
	252	} /* tuiSetSourceContent */
	253
	254
	255	/* elz: this function sets the contents of the source window to empty
	256	except for a line in the middle with a warning message about the
	257	source not being available. This function is called by
	258	tuiEraseSourceContents, which in turn is invoked when the source files
c5aa993b	259	cannot be accessed */
c906108c SS	260
c906108c SS	261	void
eca6576c	262	tuiSetSourceContentNil (TuiWinInfoPtr winInfo, char *warning_string)
c906108c SS	263	{
	264	int lineWidth;
	265	int nLines;
	266	int curr_line = 0;
	267
	268	lineWidth = winInfo->generic.width - 1;
	269	nLines = winInfo->generic.height - 2;
	270
	271	/* set to empty each line in the window, except for the one
c5aa993b	272	which contains the message */
c906108c SS	273	while (curr_line < winInfo->generic.contentSize)
	274	{
	275	/* set the information related to each displayed line
c5aa993b JM	276	to null: i.e. the line number is 0, there is no bp,
c5aa993b JM	277	it is not where the program is stopped */
c906108c SS	278
	279	TuiWinElementPtr element =
	280	(TuiWinElementPtr) winInfo->generic.content[curr_line];
	281	element->whichElement.source.lineOrAddr.lineNo = 0;
	282	element->whichElement.source.isExecPoint = FALSE;
	283	element->whichElement.source.hasBreak = FALSE;
	284
c5aa993b	285	/* set the contents of the line to blank */
c906108c SS	286	element->whichElement.source.line[0] = (char) 0;
	287
	288	/* if the current line is in the middle of the screen, then we want to
c5aa993b JM	289	display the 'no source available' message in it.
	290	Note: the 'weird' arithmetic with the line width and height comes from
	291	the function tuiEraseSourceContent. We need to keep the screen and the
	292	window's actual contents in synch */
c906108c SS	293
	294	if (curr_line == (nLines / 2 + 1))
	295	{
	296	int i;
	297	int xpos;
	298	int warning_length = strlen (warning_string);
	299	char *srcLine;
	300
	301	srcLine = element->whichElement.source.line;
	302
	303	if (warning_length >= ((lineWidth - 1) / 2))
	304	xpos = 1;
	305	else
	306	xpos = (lineWidth - 1) / 2 - warning_length;
	307
	308	for (i = 0; i < xpos; i++)
	309	srcLine[i] = ' ';
	310
	311	sprintf (srcLine + i, "%s", warning_string);
	312
	313	for (i = xpos + warning_length; i < lineWidth; i++)
	314	srcLine[i] = ' ';
	315
	316	srcLine[i] = '\n';
	317
	318	} /* end if */
	319
	320	curr_line++;
	321
c5aa993b	322	} /* end while */
c906108c	323
c5aa993b	324	} /tuiSetSourceContentNil /
c906108c SS	325
	326
	327
	328
	329	/*
c5aa993b JM	330	** tuiShowSource().
	331	** Function to display source in the source window. This function
	332	** initializes the horizontal scroll to 0.
	333	*/
c906108c	334	void
eca6576c	335	tuiShowSource (struct symtab *s, Opaque line, int noerror)
c906108c SS	336	{
	337	srcWin->detail.sourceInfo.horizontalOffset = 0;
	338	m_tuiShowSourceAsIs (s, line, noerror);
	339
	340	return;
	341	} /* tuiShowSource */
	342
	343
	344	/*
c5aa993b JM	345	** tuiSourceIsDisplayed().
	346	** Answer whether the source is currently displayed in the source window.
	347	*/
c906108c	348	int
eca6576c	349	tuiSourceIsDisplayed (char *fname)
c906108c SS	350	{
	351	return (srcWin->generic.contentInUse &&
	352	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
	353	content[0])->whichElement.locator.fileName, fname) == 0));
	354	} /* tuiSourceIsDisplayed */
	355
	356
	357	/*
c5aa993b JM	358	** tuiVerticalSourceScroll().
	359	** Scroll the source forward or backward vertically
	360	*/
c906108c	361	void
eca6576c	362	tuiVerticalSourceScroll (TuiScrollDirection scrollDirection, int numToScroll)
c906108c SS	363	{
	364	if (srcWin->generic.content != (OpaquePtr) NULL)
	365	{
	366	int line;
	367	Opaque addr;
	368	struct symtab *s;
	369	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
	370
	371	if (current_source_symtab == (struct symtab *) NULL)
	372	s = find_pc_symtab (selected_frame->pc);
	373	else
	374	s = current_source_symtab;
	375
	376	if (scrollDirection == FORWARD_SCROLL)
	377	{
	378	line = content[0]->whichElement.source.lineOrAddr.lineNo +
	379	numToScroll;
	380	if (line > s->nlines)
c5aa993b JM	381	/line = s->nlines - winInfo->generic.contentSize + 1; /
c5aa993b JM	382	/elz: fix for dts 23398 /
c906108c SS	383	line = content[0]->whichElement.source.lineOrAddr.lineNo;
	384	}
	385	else
	386	{
	387	line = content[0]->whichElement.source.lineOrAddr.lineNo -
	388	numToScroll;
	389	if (line <= 0)
	390	line = 1;
	391	}
	392	tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE);
	393	}
	394
	395	return;
	396	} /* tuiVerticalSourceScroll */
	397
	398
	399	/*****************************************
	400	STATIC LOCAL FUNCTIONS
	401	******************************************/
	402
	403	/*
c5aa993b JM	404	** _hasBreak().
	405	** Answer whether there is a break point at the input line in
	406	** the source file indicated
	407	*/
c906108c	408	static struct breakpoint *
eca6576c	409	_hasBreak (char *sourceFileName, int lineNo)
c906108c SS	410	{
	411	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
	412	struct breakpoint *bp;
	413	extern struct breakpoint *breakpoint_chain;
	414
	415
	416	for (bp = breakpoint_chain;
	417	(bp != (struct breakpoint *) NULL &&
	418	bpWithBreak == (struct breakpoint *) NULL);
	419	bp = bp->next)
75fd9bc1 SC	420	if (bp->source_file
	421	&& (strcmp (sourceFileName, bp->source_file) == 0)
	422	&& (lineNo == bp->line_number))
c906108c SS	423	bpWithBreak = bp;
	424
	425	return bpWithBreak;
	426	} /* _hasBreak */