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

/* 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 */
Commit	Line	Data
f377b406	1	/* TUI display source window.
f33c6cbf AC	2
	3	Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
	4	Inc.
	5
f377b406 SC	6	Contributed by Hewlett-Packard Company.
	7
	8	This file is part of GDB.
	9
	10	This program is free software; you can redistribute it and/or modify
	11	it under the terms of the GNU General Public License as published by
	12	the Free Software Foundation; either version 2 of the License, or
	13	(at your option) any later version.
	14
	15	This program is distributed in the hope that it will be useful,
	16	but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	GNU General Public License for more details.
	19
	20	You should have received a copy of the GNU General Public License
	21	along with this program; if not, write to the Free Software
	22	Foundation, Inc., 59 Temple Place - Suite 330,
	23	Boston, MA 02111-1307, USA. */
c906108c	24
f33c6cbf AC	25	/* FIXME: cagney/2002-02-28: The GDB coding standard indicates that
	26	"defs.h" should be included first. Unfortunatly some systems
	27	(currently Debian GNU/Linux) include the <stdbool.h> via <curses.h>
	28	and they clash with "bfd.h"'s definiton of true/false. The correct
	29	fix is to remove true/false from "bfd.h", however, until that
	30	happens, hack around it by including "config.h" and <curses.h>
	31	first. */
	32
4e8f7a8b DJ	33	#include "config.h"
	34	#ifdef HAVE_NCURSES_H
	35	#include <ncurses.h>
	36	#else
	37	#ifdef HAVE_CURSES_H
	38	#include <curses.h>
	39	#endif
	40	#endif
	41
c906108c SS	42	#include "defs.h"
	43	#include <ctype.h>
	44	#include "symtab.h"
	45	#include "frame.h"
	46	#include "breakpoint.h"
c2c6d25f	47	#include "source.h"
a4b99e53	48	#include "symtab.h"
c906108c SS	49
	50	#include "tui.h"
	51	#include "tuiData.h"
	52	#include "tuiStack.h"
	53	#include "tuiSourceWin.h"
	54	#include "tuiSource.h"
	55
	56
c906108c SS	57	/*****************************************
	58	EXTERNAL DATA DECLS
	59	******************************************/
	60	extern int current_source_line;
	61	extern struct symtab *current_source_symtab;
	62
	63
	64	/*****************************************
	65	STATIC LOCAL FUNCTIONS FORWARD DECLS
	66	******************************************/
	67
a14ed312	68	static struct breakpoint _hasBreak (char , int);
c906108c SS	69
	70
	71	/*****************************************
	72	STATIC LOCAL DATA
	73	******************************************/
	74
	75
	76	/*****************************************
	77	PUBLIC FUNCTIONS
	78	******************************************/
	79
	80	/*********************************
	81	SOURCE/DISASSEM FUNCTIONS
	82	*********************************/
	83
	84	/*
c5aa993b JM	85	** tuiSetSourceContent().
	86	** Function to display source in the source window.
	87	*/
c906108c	88	TuiStatus
eca6576c	89	tuiSetSourceContent (struct symtab *s, int lineNo, int noerror)
c906108c SS	90	{
	91	TuiStatus ret = TUI_FAILURE;
	92
	93	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
	94	{
	95	register FILE *stream;
	96	register int i, desc, c, lineWidth, nlines;
	97	register char *srcLine;
	98
	99	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
	100	{
	101	lineWidth = srcWin->generic.width - 1;
	102	/*
c5aa993b JM	103	** Take hilite (window border) into account, when calculating
	104	** the number of lines
	105	*/
c906108c SS	106	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
	107	desc = open_source_file (s);
	108	if (desc < 0)
	109	{
	110	if (!noerror)
	111	{
	112	char *name = alloca (strlen (s->filename) + 100);
	113	sprintf (name, "%s:%d", s->filename, lineNo);
	114	print_sys_errmsg (name, errno);
	115	}
	116	ret = TUI_FAILURE;
	117	}
	118	else
	119	{
	120	if (s->line_charpos == 0)
	121	find_source_lines (s, desc);
	122
	123	if (lineNo < 1 \|\| lineNo > s->nlines)
	124	{
	125	close (desc);
	126	printf_unfiltered (
	127	"Line number %d out of range; %s has %d lines.\n",
	128	lineNo, s->filename, s->nlines);
	129	}
	130	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
	131	{
	132	close (desc);
	133	perror_with_name (s->filename);
	134	}
	135	else
	136	{
	137	register int offset, curLineNo, curLine, curLen, threshold;
	138	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
	139	/*
c5aa993b JM	140	** Determine the threshold for the length of the line
	141	** and the offset to start the display
	142	*/
c906108c SS	143	offset = srcWin->detail.sourceInfo.horizontalOffset;
	144	threshold = (lineWidth - 1) + offset;
	145	stream = fdopen (desc, FOPEN_RT);
	146	clearerr (stream);
	147	curLine = 0;
	148	curLineNo =
	149	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
	150	if (offset > 0)
	151	srcLine = (char *) xmalloc (
	152	(threshold + 1) * sizeof (char));
	153	while (curLine < nlines)
	154	{
	155	TuiWinElementPtr element = (TuiWinElementPtr)
	156	srcWin->generic.content[curLine];
	157	struct breakpoint *bp;
	158
	159	/* get the first character in the line */
	160	c = fgetc (stream);
	161
	162	if (offset == 0)
	163	srcLine = ((TuiWinElementPtr)
	164	srcWin->generic.content[
	165	curLine])->whichElement.source.line;
	166	/* Init the line with the line number */
	167	sprintf (srcLine, "%-6d", curLineNo);
	168	curLen = strlen (srcLine);
	169	i = curLen -
	170	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
	171	while (i < tuiDefaultTabLen ())
	172	{
	173	srcLine[curLen] = ' ';
	174	i++;
	175	curLen++;
	176	}
	177	srcLine[curLen] = (char) 0;
	178
	179	/*
c5aa993b JM	180	** Set whether element is the execution point and
	181	** whether there is a break point on it.
	182	*/
c906108c SS	183	element->whichElement.source.lineOrAddr.lineNo =
	184	curLineNo;
	185	element->whichElement.source.isExecPoint =
	186	(strcmp (((TuiWinElementPtr)
	187	locator->content[0])->whichElement.locator.fileName,
	188	s->filename) == 0
	189	&& curLineNo == ((TuiWinElementPtr)
	190	locator->content[0])->whichElement.locator.lineNo);
	191	bp = _hasBreak (s->filename, curLineNo);
	192	element->whichElement.source.hasBreak =
	193	(bp != (struct breakpoint *) NULL &&
	194	(!element->whichElement.source.isExecPoint \|\|
b5de0fa7	195	(bp->disposition != disp_del \|\| bp->hit_count <= 0)));
c906108c SS	196	if (c != EOF)
	197	{
	198	i = strlen (srcLine) - 1;
	199	do
	200	{
	201	if ((c != '\n') &&
	202	(c != '\r') && (++i < threshold))
	203	{
	204	if (c < 040 && c != '\t')
	205	{
	206	srcLine[i++] = '^';
	207	srcLine[i] = c + 0100;
	208	}
	209	else if (c == 0177)
	210	{
	211	srcLine[i++] = '^';
	212	srcLine[i] = '?';
	213	}
	214	else
	215	{ /*
c5aa993b JM	216	** Store the charcter in the line
	217	** buffer. If it is a tab, then
	218	** translate to the correct number of
	219	** chars so we don't overwrite our
	220	** buffer.
	221	*/
c906108c SS	222	if (c == '\t')
	223	{
	224	int j, maxTabLen = tuiDefaultTabLen ();
	225
	226	for (j = i - (
	227	(i / maxTabLen) * maxTabLen);
	228	((j < maxTabLen) &&
	229	i < threshold);
	230	i++, j++)
	231	srcLine[i] = ' ';
	232	i--;
	233	}
	234	else
	235	srcLine[i] = c;
	236	}
	237	srcLine[i + 1] = 0;
	238	}
	239	else
	240	{ /*
c5aa993b JM	241	** if we have not reached EOL, then eat
	242	** chars until we do
	243	*/
c906108c SS	244	while (c != EOF && c != '\n' && c != '\r')
	245	c = fgetc (stream);
	246	}
	247	}
	248	while (c != EOF && c != '\n' && c != '\r' &&
	249	i < threshold && (c = fgetc (stream)));
	250	}
	251	/* Now copy the line taking the offset into account */
	252	if (strlen (srcLine) > offset)
	253	strcpy (((TuiWinElementPtr) srcWin->generic.content[
	254	curLine])->whichElement.source.line,
	255	&srcLine[offset]);
	256	else
	257	((TuiWinElementPtr)
	258	srcWin->generic.content[
	259	curLine])->whichElement.source.line[0] = (char) 0;
	260	curLine++;
	261	curLineNo++;
	262	}
	263	if (offset > 0)
	264	tuiFree (srcLine);
	265	fclose (stream);
	266	srcWin->generic.contentSize = nlines;
	267	ret = TUI_SUCCESS;
	268	}
	269	}
	270	}
	271	}
	272	return ret;
	273	} /* tuiSetSourceContent */
	274
	275
	276	/* elz: this function sets the contents of the source window to empty
	277	except for a line in the middle with a warning message about the
	278	source not being available. This function is called by
	279	tuiEraseSourceContents, which in turn is invoked when the source files
c5aa993b	280	cannot be accessed */
c906108c SS	281
c906108c SS	282	void
eca6576c	283	tuiSetSourceContentNil (TuiWinInfoPtr winInfo, char *warning_string)
c906108c SS	284	{
	285	int lineWidth;
	286	int nLines;
	287	int curr_line = 0;
	288
	289	lineWidth = winInfo->generic.width - 1;
	290	nLines = winInfo->generic.height - 2;
	291
	292	/* set to empty each line in the window, except for the one
c5aa993b	293	which contains the message */
c906108c SS	294	while (curr_line < winInfo->generic.contentSize)
	295	{
	296	/* set the information related to each displayed line
c5aa993b JM	297	to null: i.e. the line number is 0, there is no bp,
c5aa993b JM	298	it is not where the program is stopped */
c906108c SS	299
	300	TuiWinElementPtr element =
	301	(TuiWinElementPtr) winInfo->generic.content[curr_line];
	302	element->whichElement.source.lineOrAddr.lineNo = 0;
	303	element->whichElement.source.isExecPoint = FALSE;
	304	element->whichElement.source.hasBreak = FALSE;
	305
c5aa993b	306	/* set the contents of the line to blank */
c906108c SS	307	element->whichElement.source.line[0] = (char) 0;
	308
	309	/* if the current line is in the middle of the screen, then we want to
c5aa993b JM	310	display the 'no source available' message in it.
	311	Note: the 'weird' arithmetic with the line width and height comes from
	312	the function tuiEraseSourceContent. We need to keep the screen and the
	313	window's actual contents in synch */
c906108c SS	314
	315	if (curr_line == (nLines / 2 + 1))
	316	{
	317	int i;
	318	int xpos;
	319	int warning_length = strlen (warning_string);
	320	char *srcLine;
	321
	322	srcLine = element->whichElement.source.line;
	323
	324	if (warning_length >= ((lineWidth - 1) / 2))
	325	xpos = 1;
	326	else
	327	xpos = (lineWidth - 1) / 2 - warning_length;
	328
	329	for (i = 0; i < xpos; i++)
	330	srcLine[i] = ' ';
	331
	332	sprintf (srcLine + i, "%s", warning_string);
	333
	334	for (i = xpos + warning_length; i < lineWidth; i++)
	335	srcLine[i] = ' ';
	336
	337	srcLine[i] = '\n';
	338
	339	} /* end if */
	340
	341	curr_line++;
	342
c5aa993b	343	} /* end while */
c906108c	344
c5aa993b	345	} /tuiSetSourceContentNil /
c906108c SS	346
	347
	348
	349
	350	/*
c5aa993b JM	351	** tuiShowSource().
	352	** Function to display source in the source window. This function
	353	** initializes the horizontal scroll to 0.
	354	*/
c906108c	355	void
a4b99e53	356	tuiShowSource (struct symtab *s, TuiLineOrAddress line, int noerror)
c906108c SS	357	{
c906108c SS	358	srcWin->detail.sourceInfo.horizontalOffset = 0;
a4b99e53	359	tuiUpdateSourceWindowAsIs(srcWin, s, line, noerror);
c906108c SS	360
	361	return;
	362	} /* tuiShowSource */
	363
	364
	365	/*
c5aa993b JM	366	** tuiSourceIsDisplayed().
	367	** Answer whether the source is currently displayed in the source window.
	368	*/
c906108c	369	int
eca6576c	370	tuiSourceIsDisplayed (char *fname)
c906108c SS	371	{
	372	return (srcWin->generic.contentInUse &&
	373	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
	374	content[0])->whichElement.locator.fileName, fname) == 0));
	375	} /* tuiSourceIsDisplayed */
	376
	377
	378	/*
c5aa993b JM	379	** tuiVerticalSourceScroll().
	380	** Scroll the source forward or backward vertically
	381	*/
c906108c	382	void
a4b99e53 SC	383	tuiVerticalSourceScroll (TuiScrollDirection scrollDirection,
a4b99e53 SC	384	int numToScroll)
c906108c SS	385	{
	386	if (srcWin->generic.content != (OpaquePtr) NULL)
	387	{
a4b99e53	388	TuiLineOrAddress l;
c906108c SS	389	struct symtab *s;
	390	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
	391
	392	if (current_source_symtab == (struct symtab *) NULL)
	393	s = find_pc_symtab (selected_frame->pc);
	394	else
	395	s = current_source_symtab;
	396
	397	if (scrollDirection == FORWARD_SCROLL)
	398	{
a4b99e53	399	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo +
c906108c	400	numToScroll;
a4b99e53	401	if (l.lineNo > s->nlines)
c5aa993b JM	402	/line = s->nlines - winInfo->generic.contentSize + 1; /
c5aa993b JM	403	/elz: fix for dts 23398 /
a4b99e53	404	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo;
c906108c SS	405	}
	406	else
	407	{
a4b99e53	408	l.lineNo = content[0]->whichElement.source.lineOrAddr.lineNo -
c906108c	409	numToScroll;
a4b99e53 SC	410	if (l.lineNo <= 0)
a4b99e53 SC	411	l.lineNo = 1;
c906108c	412	}
a4b99e53 SC	413	if (identify_source_line (s, l.lineNo, 0, -1) == 1)
a4b99e53 SC	414	tuiUpdateSourceWindowAsIs (srcWin, s, l, FALSE);
c906108c SS	415	}
	416
	417	return;
	418	} /* tuiVerticalSourceScroll */
	419
	420
	421	/*****************************************
	422	STATIC LOCAL FUNCTIONS
	423	******************************************/
	424
	425	/*
c5aa993b JM	426	** _hasBreak().
	427	** Answer whether there is a break point at the input line in
	428	** the source file indicated
	429	*/
c906108c	430	static struct breakpoint *
eca6576c	431	_hasBreak (char *sourceFileName, int lineNo)
c906108c SS	432	{
	433	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
	434	struct breakpoint *bp;
	435	extern struct breakpoint *breakpoint_chain;
	436
	437
	438	for (bp = breakpoint_chain;
	439	(bp != (struct breakpoint *) NULL &&
	440	bpWithBreak == (struct breakpoint *) NULL);
	441	bp = bp->next)
75fd9bc1 SC	442	if (bp->source_file
	443	&& (strcmp (sourceFileName, bp->source_file) == 0)
	444	&& (lineNo == bp->line_number))
c906108c SS	445	bpWithBreak = bp;
	446
	447	return bpWithBreak;
	448	} /* _hasBreak */