[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 "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
#ifdef __STDC__
tuiSetSourceContent (
		      struct symtab *s,
		      int lineNo,
		      int noerror)
#else
tuiSetSourceContent (s, lineNo, noerror)
     struct symtab *s;
     int lineNo;
     int noerror;
#endif
{
  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
#ifdef __STDC__
tuiSetSourceContentNil (
			 TuiWinInfoPtr winInfo,
			 char *warning_string)
#else
tuiSetSourceContentNil (winInfo, warning_string)
     TuiWinInfoPtr winInfo;
     char *warning_string;
#endif
{
  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
#ifdef __STDC__
tuiShowSource (
		struct symtab *s,
		Opaque line,
		int noerror)
#else
tuiShowSource (s, line, noerror)
     struct symtab *s;
     Opaque line;
     int noerror;
#endif
{
  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
#ifdef __STDC__
tuiSourceIsDisplayed (
		       char *fname)
#else
tuiSourceIsDisplayed (fname)
     char *fname;
#endif
{
  return (srcWin->generic.contentInUse &&
	  (strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
		  content[0])->whichElement.locator.fileName, fname) == 0));
}				/* tuiSourceIsDisplayed */


/*
   ** tuiVerticalSourceScroll().
   **      Scroll the source forward or backward vertically
 */
void
#ifdef __STDC__
tuiVerticalSourceScroll (
			  TuiScrollDirection scrollDirection,
			  int numToScroll)
#else
tuiVerticalSourceScroll (scrollDirection, numToScroll)
     TuiScrollDirection scrollDirection;
     int numToScroll;
#endif
{
  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 *
#ifdef __STDC__
_hasBreak (
	    char *sourceFileName,
	    int lineNo)
#else
_hasBreak (sourceFileName, lineNo)
     char *sourceFileName;
     int lineNo;
#endif
{
  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 ((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 SS	67	TuiStatus
	68	#ifdef __STDC__
	69	tuiSetSourceContent (
	70	struct symtab *s,
	71	int lineNo,
	72	int noerror)
	73	#else
	74	tuiSetSourceContent (s, lineNo, noerror)
	75	struct symtab *s;
	76	int lineNo;
	77	int noerror;
	78	#endif
	79	{
	80	TuiStatus ret = TUI_FAILURE;
	81
	82	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
	83	{
	84	register FILE *stream;
	85	register int i, desc, c, lineWidth, nlines;
	86	register char *srcLine;
	87
	88	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
	89	{
	90	lineWidth = srcWin->generic.width - 1;
	91	/*
c5aa993b JM	92	** Take hilite (window border) into account, when calculating
	93	** the number of lines
	94	*/
c906108c SS	95	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
	96	desc = open_source_file (s);
	97	if (desc < 0)
	98	{
	99	if (!noerror)
	100	{
	101	char *name = alloca (strlen (s->filename) + 100);
	102	sprintf (name, "%s:%d", s->filename, lineNo);
	103	print_sys_errmsg (name, errno);
	104	}
	105	ret = TUI_FAILURE;
	106	}
	107	else
	108	{
	109	if (s->line_charpos == 0)
	110	find_source_lines (s, desc);
	111
	112	if (lineNo < 1 \|\| lineNo > s->nlines)
	113	{
	114	close (desc);
	115	printf_unfiltered (
	116	"Line number %d out of range; %s has %d lines.\n",
	117	lineNo, s->filename, s->nlines);
	118	}
	119	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
	120	{
	121	close (desc);
	122	perror_with_name (s->filename);
	123	}
	124	else
	125	{
	126	register int offset, curLineNo, curLine, curLen, threshold;
	127	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
	128	/*
c5aa993b JM	129	** Determine the threshold for the length of the line
	130	** and the offset to start the display
	131	*/
c906108c SS	132	offset = srcWin->detail.sourceInfo.horizontalOffset;
	133	threshold = (lineWidth - 1) + offset;
	134	stream = fdopen (desc, FOPEN_RT);
	135	clearerr (stream);
	136	curLine = 0;
	137	curLineNo =
	138	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
	139	if (offset > 0)
	140	srcLine = (char *) xmalloc (
	141	(threshold + 1) * sizeof (char));
	142	while (curLine < nlines)
	143	{
	144	TuiWinElementPtr element = (TuiWinElementPtr)
	145	srcWin->generic.content[curLine];
	146	struct breakpoint *bp;
	147
	148	/* get the first character in the line */
	149	c = fgetc (stream);
	150
	151	if (offset == 0)
	152	srcLine = ((TuiWinElementPtr)
	153	srcWin->generic.content[
	154	curLine])->whichElement.source.line;
	155	/* Init the line with the line number */
	156	sprintf (srcLine, "%-6d", curLineNo);
	157	curLen = strlen (srcLine);
	158	i = curLen -
	159	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
	160	while (i < tuiDefaultTabLen ())
	161	{
	162	srcLine[curLen] = ' ';
	163	i++;
	164	curLen++;
	165	}
	166	srcLine[curLen] = (char) 0;
	167
	168	/*
c5aa993b JM	169	** Set whether element is the execution point and
	170	** whether there is a break point on it.
	171	*/
c906108c SS	172	element->whichElement.source.lineOrAddr.lineNo =
	173	curLineNo;
	174	element->whichElement.source.isExecPoint =
	175	(strcmp (((TuiWinElementPtr)
	176	locator->content[0])->whichElement.locator.fileName,
	177	s->filename) == 0
	178	&& curLineNo == ((TuiWinElementPtr)
	179	locator->content[0])->whichElement.locator.lineNo);
	180	bp = _hasBreak (s->filename, curLineNo);
	181	element->whichElement.source.hasBreak =
	182	(bp != (struct breakpoint *) NULL &&
	183	(!element->whichElement.source.isExecPoint \|\|
	184	(bp->disposition != del \|\| bp->hit_count <= 0)));
	185	if (c != EOF)
	186	{
	187	i = strlen (srcLine) - 1;
	188	do
	189	{
	190	if ((c != '\n') &&
	191	(c != '\r') && (++i < threshold))
	192	{
	193	if (c < 040 && c != '\t')
	194	{
	195	srcLine[i++] = '^';
	196	srcLine[i] = c + 0100;
	197	}
	198	else if (c == 0177)
	199	{
	200	srcLine[i++] = '^';
	201	srcLine[i] = '?';
	202	}
	203	else
	204	{ /*
c5aa993b JM	205	** Store the charcter in the line
	206	** buffer. If it is a tab, then
	207	** translate to the correct number of
	208	** chars so we don't overwrite our
	209	** buffer.
	210	*/
c906108c SS	211	if (c == '\t')
	212	{
	213	int j, maxTabLen = tuiDefaultTabLen ();
	214
	215	for (j = i - (
	216	(i / maxTabLen) * maxTabLen);
	217	((j < maxTabLen) &&
	218	i < threshold);
	219	i++, j++)
	220	srcLine[i] = ' ';
	221	i--;
	222	}
	223	else
	224	srcLine[i] = c;
	225	}
	226	srcLine[i + 1] = 0;
	227	}
	228	else
	229	{ /*
c5aa993b JM	230	** if we have not reached EOL, then eat
	231	** chars until we do
	232	*/
c906108c SS	233	while (c != EOF && c != '\n' && c != '\r')
	234	c = fgetc (stream);
	235	}
	236	}
	237	while (c != EOF && c != '\n' && c != '\r' &&
	238	i < threshold && (c = fgetc (stream)));
	239	}
	240	/* Now copy the line taking the offset into account */
	241	if (strlen (srcLine) > offset)
	242	strcpy (((TuiWinElementPtr) srcWin->generic.content[
	243	curLine])->whichElement.source.line,
	244	&srcLine[offset]);
	245	else
	246	((TuiWinElementPtr)
	247	srcWin->generic.content[
	248	curLine])->whichElement.source.line[0] = (char) 0;
	249	curLine++;
	250	curLineNo++;
	251	}
	252	if (offset > 0)
	253	tuiFree (srcLine);
	254	fclose (stream);
	255	srcWin->generic.contentSize = nlines;
	256	ret = TUI_SUCCESS;
	257	}
	258	}
	259	}
	260	}
	261	return ret;
	262	} /* tuiSetSourceContent */
	263
	264
	265	/* elz: this function sets the contents of the source window to empty
	266	except for a line in the middle with a warning message about the
	267	source not being available. This function is called by
	268	tuiEraseSourceContents, which in turn is invoked when the source files
c5aa993b	269	cannot be accessed */
c906108c SS	270
	271	void
	272	#ifdef __STDC__
	273	tuiSetSourceContentNil (
	274	TuiWinInfoPtr winInfo,
	275	char *warning_string)
	276	#else
	277	tuiSetSourceContentNil (winInfo, warning_string)
	278	TuiWinInfoPtr winInfo;
	279	char *warning_string;
	280	#endif
	281	{
	282	int lineWidth;
	283	int nLines;
	284	int curr_line = 0;
	285
	286	lineWidth = winInfo->generic.width - 1;
	287	nLines = winInfo->generic.height - 2;
	288
	289	/* set to empty each line in the window, except for the one
c5aa993b	290	which contains the message */
c906108c SS	291	while (curr_line < winInfo->generic.contentSize)
	292	{
	293	/* set the information related to each displayed line
c5aa993b JM	294	to null: i.e. the line number is 0, there is no bp,
c5aa993b JM	295	it is not where the program is stopped */
c906108c SS	296
	297	TuiWinElementPtr element =
	298	(TuiWinElementPtr) winInfo->generic.content[curr_line];
	299	element->whichElement.source.lineOrAddr.lineNo = 0;
	300	element->whichElement.source.isExecPoint = FALSE;
	301	element->whichElement.source.hasBreak = FALSE;
	302
c5aa993b	303	/* set the contents of the line to blank */
c906108c SS	304	element->whichElement.source.line[0] = (char) 0;
	305
	306	/* if the current line is in the middle of the screen, then we want to
c5aa993b JM	307	display the 'no source available' message in it.
	308	Note: the 'weird' arithmetic with the line width and height comes from
	309	the function tuiEraseSourceContent. We need to keep the screen and the
	310	window's actual contents in synch */
c906108c SS	311
	312	if (curr_line == (nLines / 2 + 1))
	313	{
	314	int i;
	315	int xpos;
	316	int warning_length = strlen (warning_string);
	317	char *srcLine;
	318
	319	srcLine = element->whichElement.source.line;
	320
	321	if (warning_length >= ((lineWidth - 1) / 2))
	322	xpos = 1;
	323	else
	324	xpos = (lineWidth - 1) / 2 - warning_length;
	325
	326	for (i = 0; i < xpos; i++)
	327	srcLine[i] = ' ';
	328
	329	sprintf (srcLine + i, "%s", warning_string);
	330
	331	for (i = xpos + warning_length; i < lineWidth; i++)
	332	srcLine[i] = ' ';
	333
	334	srcLine[i] = '\n';
	335
	336	} /* end if */
	337
	338	curr_line++;
	339
c5aa993b	340	} /* end while */
c906108c	341
c5aa993b	342	} /tuiSetSourceContentNil /
c906108c SS	343
	344
	345
	346
	347	/*
c5aa993b JM	348	** tuiShowSource().
	349	** Function to display source in the source window. This function
	350	** initializes the horizontal scroll to 0.
	351	*/
c906108c SS	352	void
	353	#ifdef __STDC__
	354	tuiShowSource (
	355	struct symtab *s,
	356	Opaque line,
	357	int noerror)
	358	#else
	359	tuiShowSource (s, line, noerror)
	360	struct symtab *s;
	361	Opaque line;
	362	int noerror;
	363	#endif
	364	{
	365	srcWin->detail.sourceInfo.horizontalOffset = 0;
	366	m_tuiShowSourceAsIs (s, line, noerror);
	367
	368	return;
	369	} /* tuiShowSource */
	370
	371
	372	/*
c5aa993b JM	373	** tuiSourceIsDisplayed().
	374	** Answer whether the source is currently displayed in the source window.
	375	*/
c906108c SS	376	int
	377	#ifdef __STDC__
	378	tuiSourceIsDisplayed (
	379	char *fname)
	380	#else
	381	tuiSourceIsDisplayed (fname)
	382	char *fname;
	383	#endif
	384	{
	385	return (srcWin->generic.contentInUse &&
	386	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
	387	content[0])->whichElement.locator.fileName, fname) == 0));
	388	} /* tuiSourceIsDisplayed */
	389
	390
	391	/*
c5aa993b JM	392	** tuiVerticalSourceScroll().
	393	** Scroll the source forward or backward vertically
	394	*/
c906108c SS	395	void
	396	#ifdef __STDC__
	397	tuiVerticalSourceScroll (
	398	TuiScrollDirection scrollDirection,
	399	int numToScroll)
	400	#else
	401	tuiVerticalSourceScroll (scrollDirection, numToScroll)
	402	TuiScrollDirection scrollDirection;
	403	int numToScroll;
	404	#endif
	405	{
	406	if (srcWin->generic.content != (OpaquePtr) NULL)
	407	{
	408	int line;
	409	Opaque addr;
	410	struct symtab *s;
	411	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
	412
	413	if (current_source_symtab == (struct symtab *) NULL)
	414	s = find_pc_symtab (selected_frame->pc);
	415	else
	416	s = current_source_symtab;
	417
	418	if (scrollDirection == FORWARD_SCROLL)
	419	{
	420	line = content[0]->whichElement.source.lineOrAddr.lineNo +
	421	numToScroll;
	422	if (line > s->nlines)
c5aa993b JM	423	/line = s->nlines - winInfo->generic.contentSize + 1; /
c5aa993b JM	424	/elz: fix for dts 23398 /
c906108c SS	425	line = content[0]->whichElement.source.lineOrAddr.lineNo;
	426	}
	427	else
	428	{
	429	line = content[0]->whichElement.source.lineOrAddr.lineNo -
	430	numToScroll;
	431	if (line <= 0)
	432	line = 1;
	433	}
	434	tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE);
	435	}
	436
	437	return;
	438	} /* tuiVerticalSourceScroll */
	439
	440
	441	/*****************************************
	442	STATIC LOCAL FUNCTIONS
	443	******************************************/
	444
	445	/*
c5aa993b JM	446	** _hasBreak().
	447	** Answer whether there is a break point at the input line in
	448	** the source file indicated
	449	*/
c906108c SS	450	static struct breakpoint *
	451	#ifdef __STDC__
	452	_hasBreak (
	453	char *sourceFileName,
	454	int lineNo)
	455	#else
	456	_hasBreak (sourceFileName, lineNo)
	457	char *sourceFileName;
	458	int lineNo;
	459	#endif
	460	{
	461	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
	462	struct breakpoint *bp;
	463	extern struct breakpoint *breakpoint_chain;
	464
	465
	466	for (bp = breakpoint_chain;
	467	(bp != (struct breakpoint *) NULL &&
	468	bpWithBreak == (struct breakpoint *) NULL);
	469	bp = bp->next)
	470	if ((strcmp (sourceFileName, bp->source_file) == 0) &&
	471	(lineNo == bp->line_number))
	472	bpWithBreak = bp;
	473
	474	return bpWithBreak;
	475	} /* _hasBreak */