[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.  */

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