[deliverable/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 "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 */
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"
a4b99e53	28	#include "symtab.h"
c906108c SS	29
	30	#include "tui.h"
	31	#include "tuiData.h"
	32	#include "tuiStack.h"
	33	#include "tuiSourceWin.h"
	34	#include "tuiSource.h"
	35
	36
c906108c SS	37	/*****************************************
	38	EXTERNAL DATA DECLS
	39	******************************************/
	40	extern int current_source_line;
	41	extern struct symtab *current_source_symtab;
	42
	43
	44	/*****************************************
	45	STATIC LOCAL FUNCTIONS FORWARD DECLS
	46	******************************************/
	47
a14ed312	48	static struct breakpoint _hasBreak (char , int);
c906108c SS	49
	50
	51	/*****************************************
	52	STATIC LOCAL DATA
	53	******************************************/
	54
	55
	56	/*****************************************
	57	PUBLIC FUNCTIONS
	58	******************************************/
	59
	60	/*********************************
	61	SOURCE/DISASSEM FUNCTIONS
	62	*********************************/
	63
	64	/*
c5aa993b JM	65	** tuiSetSourceContent().
	66	** Function to display source in the source window.
	67	*/
c906108c	68	TuiStatus
eca6576c	69	tuiSetSourceContent (struct symtab *s, int lineNo, int noerror)
c906108c SS	70	{
	71	TuiStatus ret = TUI_FAILURE;
	72
	73	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
	74	{
	75	register FILE *stream;
	76	register int i, desc, c, lineWidth, nlines;
	77	register char *srcLine;
	78
	79	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
	80	{
	81	lineWidth = srcWin->generic.width - 1;
	82	/*
c5aa993b JM	83	** Take hilite (window border) into account, when calculating
	84	** the number of lines
	85	*/
c906108c SS	86	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
	87	desc = open_source_file (s);
	88	if (desc < 0)
	89	{
	90	if (!noerror)
	91	{
	92	char *name = alloca (strlen (s->filename) + 100);
	93	sprintf (name, "%s:%d", s->filename, lineNo);
	94	print_sys_errmsg (name, errno);
	95	}
	96	ret = TUI_FAILURE;
	97	}
	98	else
	99	{
	100	if (s->line_charpos == 0)
	101	find_source_lines (s, desc);
	102
	103	if (lineNo < 1 \|\| lineNo > s->nlines)
	104	{
	105	close (desc);
	106	printf_unfiltered (
	107	"Line number %d out of range; %s has %d lines.\n",
	108	lineNo, s->filename, s->nlines);
	109	}
	110	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
	111	{
	112	close (desc);
	113	perror_with_name (s->filename);
	114	}
	115	else
	116	{
	117	register int offset, curLineNo, curLine, curLen, threshold;
	118	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
	119	/*
c5aa993b JM	120	** Determine the threshold for the length of the line
	121	** and the offset to start the display
	122	*/
c906108c SS	123	offset = srcWin->detail.sourceInfo.horizontalOffset;
	124	threshold = (lineWidth - 1) + offset;
	125	stream = fdopen (desc, FOPEN_RT);
	126	clearerr (stream);
	127	curLine = 0;
	128	curLineNo =
	129	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
	130	if (offset > 0)
	131	srcLine = (char *) xmalloc (
	132	(threshold + 1) * sizeof (char));
	133	while (curLine < nlines)
	134	{
	135	TuiWinElementPtr element = (TuiWinElementPtr)
	136	srcWin->generic.content[curLine];
	137	struct breakpoint *bp;
	138
	139	/* get the first character in the line */
	140	c = fgetc (stream);
	141
	142	if (offset == 0)
	143	srcLine = ((TuiWinElementPtr)
	144	srcWin->generic.content[
	145	curLine])->whichElement.source.line;
	146	/* Init the line with the line number */
	147	sprintf (srcLine, "%-6d", curLineNo);
	148	curLen = strlen (srcLine);
	149	i = curLen -
	150	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
	151	while (i < tuiDefaultTabLen ())
	152	{
	153	srcLine[curLen] = ' ';
	154	i++;
	155	curLen++;
	156	}
	157	srcLine[curLen] = (char) 0;
	158
	159	/*
c5aa993b JM	160	** Set whether element is the execution point and
	161	** whether there is a break point on it.
	162	*/
c906108c SS	163	element->whichElement.source.lineOrAddr.lineNo =
	164	curLineNo;
	165	element->whichElement.source.isExecPoint =
	166	(strcmp (((TuiWinElementPtr)
	167	locator->content[0])->whichElement.locator.fileName,
	168	s->filename) == 0
	169	&& curLineNo == ((TuiWinElementPtr)
	170	locator->content[0])->whichElement.locator.lineNo);
	171	bp = _hasBreak (s->filename, curLineNo);
	172	element->whichElement.source.hasBreak =
	173	(bp != (struct breakpoint *) NULL &&
	174	(!element->whichElement.source.isExecPoint \|\|
b5de0fa7	175	(bp->disposition != disp_del \|\| bp->hit_count <= 0)));
c906108c SS	176	if (c != EOF)
	177	{
	178	i = strlen (srcLine) - 1;
	179	do
	180	{
	181	if ((c != '\n') &&
	182	(c != '\r') && (++i < threshold))
	183	{
	184	if (c < 040 && c != '\t')
	185	{
	186	srcLine[i++] = '^';
	187	srcLine[i] = c + 0100;
	188	}
	189	else if (c == 0177)
	190	{
	191	srcLine[i++] = '^';
	192	srcLine[i] = '?';
	193	}
	194	else
	195	{ /*
c5aa993b JM	196	** Store the charcter in the line
	197	** buffer. If it is a tab, then
	198	** translate to the correct number of
	199	** chars so we don't overwrite our
	200	** buffer.
	201	*/
c906108c SS	202	if (c == '\t')
	203	{
	204	int j, maxTabLen = tuiDefaultTabLen ();
	205
	206	for (j = i - (
	207	(i / maxTabLen) * maxTabLen);
	208	((j < maxTabLen) &&
	209	i < threshold);
	210	i++, j++)
	211	srcLine[i] = ' ';
	212	i--;
	213	}
	214	else
	215	srcLine[i] = c;
	216	}
	217	srcLine[i + 1] = 0;
	218	}
	219	else
	220	{ /*
c5aa993b JM	221	** if we have not reached EOL, then eat
	222	** chars until we do
	223	*/
c906108c SS	224	while (c != EOF && c != '\n' && c != '\r')
	225	c = fgetc (stream);
	226	}
	227	}
	228	while (c != EOF && c != '\n' && c != '\r' &&
	229	i < threshold && (c = fgetc (stream)));
	230	}
	231	/* Now copy the line taking the offset into account */
	232	if (strlen (srcLine) > offset)
	233	strcpy (((TuiWinElementPtr) srcWin->generic.content[
	234	curLine])->whichElement.source.line,
	235	&srcLine[offset]);
	236	else
	237	((TuiWinElementPtr)
	238	srcWin->generic.content[
	239	curLine])->whichElement.source.line[0] = (char) 0;
	240	curLine++;
	241	curLineNo++;
	242	}
	243	if (offset > 0)
	244	tuiFree (srcLine);
	245	fclose (stream);
	246	srcWin->generic.contentSize = nlines;
	247	ret = TUI_SUCCESS;
	248	}
	249	}
	250	}
	251	}
	252	return ret;
	253	} /* tuiSetSourceContent */
	254
	255
	256	/* elz: this function sets the contents of the source window to empty
	257	except for a line in the middle with a warning message about the
	258	source not being available. This function is called by
	259	tuiEraseSourceContents, which in turn is invoked when the source files
c5aa993b	260	cannot be accessed */
c906108c SS	261
c906108c SS	262	void
eca6576c	263	tuiSetSourceContentNil (TuiWinInfoPtr winInfo, char *warning_string)
c906108c SS	264	{
	265	int lineWidth;
	266	int nLines;
	267	int curr_line = 0;
	268
	269	lineWidth = winInfo->generic.width - 1;
	270	nLines = winInfo->generic.height - 2;
	271
	272	/* set to empty each line in the window, except for the one
c5aa993b	273	which contains the message */
c906108c SS	274	while (curr_line < winInfo->generic.contentSize)
	275	{
	276	/* set the information related to each displayed line
c5aa993b JM	277	to null: i.e. the line number is 0, there is no bp,
c5aa993b JM	278	it is not where the program is stopped */
c906108c SS	279
	280	TuiWinElementPtr element =
	281	(TuiWinElementPtr) winInfo->generic.content[curr_line];
	282	element->whichElement.source.lineOrAddr.lineNo = 0;
	283	element->whichElement.source.isExecPoint = FALSE;
	284	element->whichElement.source.hasBreak = FALSE;
	285
c5aa993b	286	/* set the contents of the line to blank */
c906108c SS	287	element->whichElement.source.line[0] = (char) 0;
	288
	289	/* if the current line is in the middle of the screen, then we want to
c5aa993b JM	290	display the 'no source available' message in it.
	291	Note: the 'weird' arithmetic with the line width and height comes from
	292	the function tuiEraseSourceContent. We need to keep the screen and the
	293	window's actual contents in synch */
c906108c SS	294
	295	if (curr_line == (nLines / 2 + 1))
	296	{
	297	int i;
	298	int xpos;
	299	int warning_length = strlen (warning_string);
	300	char *srcLine;
	301
	302	srcLine = element->whichElement.source.line;
	303
	304	if (warning_length >= ((lineWidth - 1) / 2))
	305	xpos = 1;
	306	else
	307	xpos = (lineWidth - 1) / 2 - warning_length;
	308
	309	for (i = 0; i < xpos; i++)
	310	srcLine[i] = ' ';
	311
	312	sprintf (srcLine + i, "%s", warning_string);
	313
	314	for (i = xpos + warning_length; i < lineWidth; i++)
	315	srcLine[i] = ' ';
	316
	317	srcLine[i] = '\n';
	318
	319	} /* end if */
	320
	321	curr_line++;
	322
c5aa993b	323	} /* end while */
c906108c	324
c5aa993b	325	} /tuiSetSourceContentNil /
c906108c SS	326
	327
	328
	329
	330	/*
c5aa993b JM	331	** tuiShowSource().
	332	** Function to display source in the source window. This function
	333	** initializes the horizontal scroll to 0.
	334	*/
c906108c	335	void
a4b99e53	336	tuiShowSource (struct symtab *s, TuiLineOrAddress line, int noerror)
c906108c SS	337	{
c906108c SS	338	srcWin->detail.sourceInfo.horizontalOffset = 0;
a4b99e53	339	tuiUpdateSourceWindowAsIs(srcWin, s, line, noerror);
c906108c SS	340
	341	return;
	342	} /* tuiShowSource */
	343
	344
	345	/*
c5aa993b JM	346	** tuiSourceIsDisplayed().
	347	** Answer whether the source is currently displayed in the source window.
	348	*/
c906108c	349	int
eca6576c	350	tuiSourceIsDisplayed (char *fname)
c906108c SS	351	{
	352	return (srcWin->generic.contentInUse &&
	353	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
	354	content[0])->whichElement.locator.fileName, fname) == 0));
	355	} /* tuiSourceIsDisplayed */
	356
	357
	358	/*
c5aa993b JM	359	** tuiVerticalSourceScroll().
	360	** Scroll the source forward or backward vertically
	361	*/
c906108c	362	void
a4b99e53 SC	363	tuiVerticalSourceScroll (TuiScrollDirection scrollDirection,
a4b99e53 SC	364	int numToScroll)
c906108c SS	365	{
	366	if (srcWin->generic.content != (OpaquePtr) NULL)
	367	{
a4b99e53	368	TuiLineOrAddress l;
c906108c SS	369	struct symtab *s;
	370	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
	371
	372	if (current_source_symtab == (struct symtab *) NULL)
	373	s = find_pc_symtab (selected_frame->pc);
	374	else
	375	s = current_source_symtab;
	376
	377	if (scrollDirection == FORWARD_SCROLL)
	378	{
a4b99e53	379	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo +
c906108c	380	numToScroll;
a4b99e53	381	if (l.lineNo > s->nlines)
c5aa993b JM	382	/line = s->nlines - winInfo->generic.contentSize + 1; /
c5aa993b JM	383	/elz: fix for dts 23398 /
a4b99e53	384	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo;
c906108c SS	385	}
	386	else
	387	{
a4b99e53	388	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo -
c906108c	389	numToScroll;
a4b99e53 SC	390	if (l.lineNo <= 0)
a4b99e53 SC	391	l.lineNo = 1;
c906108c	392	}
a4b99e53 SC	393	if (identify_source_line (s, l.lineNo, 0, -1) == 1)
a4b99e53 SC	394	tuiUpdateSourceWindowAsIs (srcWin, s, l, FALSE);
c906108c SS	395	}
	396
	397	return;
	398	} /* tuiVerticalSourceScroll */
	399
	400
	401	/*****************************************
	402	STATIC LOCAL FUNCTIONS
	403	******************************************/
	404
	405	/*
c5aa993b JM	406	** _hasBreak().
	407	** Answer whether there is a break point at the input line in
	408	** the source file indicated
	409	*/
c906108c	410	static struct breakpoint *
eca6576c	411	_hasBreak (char *sourceFileName, int lineNo)
c906108c SS	412	{
	413	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
	414	struct breakpoint *bp;
	415	extern struct breakpoint *breakpoint_chain;
	416
	417
	418	for (bp = breakpoint_chain;
	419	(bp != (struct breakpoint *) NULL &&
	420	bpWithBreak == (struct breakpoint *) NULL);
	421	bp = bp->next)
75fd9bc1 SC	422	if (bp->source_file
	423	&& (strcmp (sourceFileName, bp->source_file) == 0)
	424	&& (lineNo == bp->line_number))
c906108c SS	425	bpWithBreak = bp;
	426
	427	return bpWithBreak;
	428	} /* _hasBreak */