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

/*
   ** tuiSource.c
   **         This module contains functions for displaying source in the source window
 */

#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 PARAMS ((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
c906108c	1	/*
c5aa993b JM	2	** tuiSource.c
	3	** This module contains functions for displaying source in the source window
	4	*/
c906108c SS	5
	6	#include "defs.h"
	7	#include <ctype.h>
	8	#include "symtab.h"
	9	#include "frame.h"
	10	#include "breakpoint.h"
c2c6d25f	11	#include "source.h"
c906108c SS	12
	13	#include "tui.h"
	14	#include "tuiData.h"
	15	#include "tuiStack.h"
	16	#include "tuiSourceWin.h"
	17	#include "tuiSource.h"
	18
	19
c906108c SS	20	/*****************************************
	21	EXTERNAL DATA DECLS
	22	******************************************/
	23	extern int current_source_line;
	24	extern struct symtab *current_source_symtab;
	25
	26
	27	/*****************************************
	28	STATIC LOCAL FUNCTIONS FORWARD DECLS
	29	******************************************/
	30
	31	static struct breakpoint _hasBreak PARAMS ((char , int));
	32
	33
	34	/*****************************************
	35	STATIC LOCAL DATA
	36	******************************************/
	37
	38
	39	/*****************************************
	40	PUBLIC FUNCTIONS
	41	******************************************/
	42
	43	/*********************************
	44	SOURCE/DISASSEM FUNCTIONS
	45	*********************************/
	46
	47	/*
c5aa993b JM	48	** tuiSetSourceContent().
	49	** Function to display source in the source window.
	50	*/
c906108c SS	51	TuiStatus
	52	#ifdef __STDC__
	53	tuiSetSourceContent (
	54	struct symtab *s,
	55	int lineNo,
	56	int noerror)
	57	#else
	58	tuiSetSourceContent (s, lineNo, noerror)
	59	struct symtab *s;
	60	int lineNo;
	61	int noerror;
	62	#endif
	63	{
	64	TuiStatus ret = TUI_FAILURE;
	65
	66	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
	67	{
	68	register FILE *stream;
	69	register int i, desc, c, lineWidth, nlines;
	70	register char *srcLine;
	71
	72	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
	73	{
	74	lineWidth = srcWin->generic.width - 1;
	75	/*
c5aa993b JM	76	** Take hilite (window border) into account, when calculating
	77	** the number of lines
	78	*/
c906108c SS	79	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
	80	desc = open_source_file (s);
	81	if (desc < 0)
	82	{
	83	if (!noerror)
	84	{
	85	char *name = alloca (strlen (s->filename) + 100);
	86	sprintf (name, "%s:%d", s->filename, lineNo);
	87	print_sys_errmsg (name, errno);
	88	}
	89	ret = TUI_FAILURE;
	90	}
	91	else
	92	{
	93	if (s->line_charpos == 0)
	94	find_source_lines (s, desc);
	95
	96	if (lineNo < 1 \|\| lineNo > s->nlines)
	97	{
	98	close (desc);
	99	printf_unfiltered (
	100	"Line number %d out of range; %s has %d lines.\n",
	101	lineNo, s->filename, s->nlines);
	102	}
	103	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
	104	{
	105	close (desc);
	106	perror_with_name (s->filename);
	107	}
	108	else
	109	{
	110	register int offset, curLineNo, curLine, curLen, threshold;
	111	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
	112	/*
c5aa993b JM	113	** Determine the threshold for the length of the line
	114	** and the offset to start the display
	115	*/
c906108c SS	116	offset = srcWin->detail.sourceInfo.horizontalOffset;
	117	threshold = (lineWidth - 1) + offset;
	118	stream = fdopen (desc, FOPEN_RT);
	119	clearerr (stream);
	120	curLine = 0;
	121	curLineNo =
	122	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
	123	if (offset > 0)
	124	srcLine = (char *) xmalloc (
	125	(threshold + 1) * sizeof (char));
	126	while (curLine < nlines)
	127	{
	128	TuiWinElementPtr element = (TuiWinElementPtr)
	129	srcWin->generic.content[curLine];
	130	struct breakpoint *bp;
	131
	132	/* get the first character in the line */
	133	c = fgetc (stream);
	134
	135	if (offset == 0)
	136	srcLine = ((TuiWinElementPtr)
	137	srcWin->generic.content[
	138	curLine])->whichElement.source.line;
	139	/* Init the line with the line number */
	140	sprintf (srcLine, "%-6d", curLineNo);
	141	curLen = strlen (srcLine);
	142	i = curLen -
	143	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
	144	while (i < tuiDefaultTabLen ())
	145	{
	146	srcLine[curLen] = ' ';
	147	i++;
	148	curLen++;
	149	}
	150	srcLine[curLen] = (char) 0;
	151
	152	/*
c5aa993b JM	153	** Set whether element is the execution point and
	154	** whether there is a break point on it.
	155	*/
c906108c SS	156	element->whichElement.source.lineOrAddr.lineNo =
	157	curLineNo;
	158	element->whichElement.source.isExecPoint =
	159	(strcmp (((TuiWinElementPtr)
	160	locator->content[0])->whichElement.locator.fileName,
	161	s->filename) == 0
	162	&& curLineNo == ((TuiWinElementPtr)
	163	locator->content[0])->whichElement.locator.lineNo);
	164	bp = _hasBreak (s->filename, curLineNo);
	165	element->whichElement.source.hasBreak =
	166	(bp != (struct breakpoint *) NULL &&
	167	(!element->whichElement.source.isExecPoint \|\|
	168	(bp->disposition != del \|\| bp->hit_count <= 0)));
	169	if (c != EOF)
	170	{
	171	i = strlen (srcLine) - 1;
	172	do
	173	{
	174	if ((c != '\n') &&
	175	(c != '\r') && (++i < threshold))
	176	{
	177	if (c < 040 && c != '\t')
	178	{
	179	srcLine[i++] = '^';
	180	srcLine[i] = c + 0100;
	181	}
	182	else if (c == 0177)
	183	{
	184	srcLine[i++] = '^';
	185	srcLine[i] = '?';
	186	}
	187	else
	188	{ /*
c5aa993b JM	189	** Store the charcter in the line
	190	** buffer. If it is a tab, then
	191	** translate to the correct number of
	192	** chars so we don't overwrite our
	193	** buffer.
	194	*/
c906108c SS	195	if (c == '\t')
	196	{
	197	int j, maxTabLen = tuiDefaultTabLen ();
	198
	199	for (j = i - (
	200	(i / maxTabLen) * maxTabLen);
	201	((j < maxTabLen) &&
	202	i < threshold);
	203	i++, j++)
	204	srcLine[i] = ' ';
	205	i--;
	206	}
	207	else
	208	srcLine[i] = c;
	209	}
	210	srcLine[i + 1] = 0;
	211	}
	212	else
	213	{ /*
c5aa993b JM	214	** if we have not reached EOL, then eat
	215	** chars until we do
	216	*/
c906108c SS	217	while (c != EOF && c != '\n' && c != '\r')
	218	c = fgetc (stream);
	219	}
	220	}
	221	while (c != EOF && c != '\n' && c != '\r' &&
	222	i < threshold && (c = fgetc (stream)));
	223	}
	224	/* Now copy the line taking the offset into account */
	225	if (strlen (srcLine) > offset)
	226	strcpy (((TuiWinElementPtr) srcWin->generic.content[
	227	curLine])->whichElement.source.line,
	228	&srcLine[offset]);
	229	else
	230	((TuiWinElementPtr)
	231	srcWin->generic.content[
	232	curLine])->whichElement.source.line[0] = (char) 0;
	233	curLine++;
	234	curLineNo++;
	235	}
	236	if (offset > 0)
	237	tuiFree (srcLine);
	238	fclose (stream);
	239	srcWin->generic.contentSize = nlines;
	240	ret = TUI_SUCCESS;
	241	}
	242	}
	243	}
	244	}
	245	return ret;
	246	} /* tuiSetSourceContent */
	247
	248
	249	/* elz: this function sets the contents of the source window to empty
	250	except for a line in the middle with a warning message about the
	251	source not being available. This function is called by
	252	tuiEraseSourceContents, which in turn is invoked when the source files
c5aa993b	253	cannot be accessed */
c906108c SS	254
	255	void
	256	#ifdef __STDC__
	257	tuiSetSourceContentNil (
	258	TuiWinInfoPtr winInfo,
	259	char *warning_string)
	260	#else
	261	tuiSetSourceContentNil (winInfo, warning_string)
	262	TuiWinInfoPtr winInfo;
	263	char *warning_string;
	264	#endif
	265	{
	266	int lineWidth;
	267	int nLines;
	268	int curr_line = 0;
	269
	270	lineWidth = winInfo->generic.width - 1;
	271	nLines = winInfo->generic.height - 2;
	272
	273	/* set to empty each line in the window, except for the one
c5aa993b	274	which contains the message */
c906108c SS	275	while (curr_line < winInfo->generic.contentSize)
	276	{
	277	/* set the information related to each displayed line
c5aa993b JM	278	to null: i.e. the line number is 0, there is no bp,
c5aa993b JM	279	it is not where the program is stopped */
c906108c SS	280
	281	TuiWinElementPtr element =
	282	(TuiWinElementPtr) winInfo->generic.content[curr_line];
	283	element->whichElement.source.lineOrAddr.lineNo = 0;
	284	element->whichElement.source.isExecPoint = FALSE;
	285	element->whichElement.source.hasBreak = FALSE;
	286
c5aa993b	287	/* set the contents of the line to blank */
c906108c SS	288	element->whichElement.source.line[0] = (char) 0;
	289
	290	/* if the current line is in the middle of the screen, then we want to
c5aa993b JM	291	display the 'no source available' message in it.
	292	Note: the 'weird' arithmetic with the line width and height comes from
	293	the function tuiEraseSourceContent. We need to keep the screen and the
	294	window's actual contents in synch */
c906108c SS	295
	296	if (curr_line == (nLines / 2 + 1))
	297	{
	298	int i;
	299	int xpos;
	300	int warning_length = strlen (warning_string);
	301	char *srcLine;
	302
	303	srcLine = element->whichElement.source.line;
	304
	305	if (warning_length >= ((lineWidth - 1) / 2))
	306	xpos = 1;
	307	else
	308	xpos = (lineWidth - 1) / 2 - warning_length;
	309
	310	for (i = 0; i < xpos; i++)
	311	srcLine[i] = ' ';
	312
	313	sprintf (srcLine + i, "%s", warning_string);
	314
	315	for (i = xpos + warning_length; i < lineWidth; i++)
	316	srcLine[i] = ' ';
	317
	318	srcLine[i] = '\n';
	319
	320	} /* end if */
	321
	322	curr_line++;
	323
c5aa993b	324	} /* end while */
c906108c	325
c5aa993b	326	} /tuiSetSourceContentNil /
c906108c SS	327
	328
	329
	330
	331	/*
c5aa993b JM	332	** tuiShowSource().
	333	** Function to display source in the source window. This function
	334	** initializes the horizontal scroll to 0.
	335	*/
c906108c SS	336	void
	337	#ifdef __STDC__
	338	tuiShowSource (
	339	struct symtab *s,
	340	Opaque line,
	341	int noerror)
	342	#else
	343	tuiShowSource (s, line, noerror)
	344	struct symtab *s;
	345	Opaque line;
	346	int noerror;
	347	#endif
	348	{
	349	srcWin->detail.sourceInfo.horizontalOffset = 0;
	350	m_tuiShowSourceAsIs (s, line, noerror);
	351
	352	return;
	353	} /* tuiShowSource */
	354
	355
	356	/*
c5aa993b JM	357	** tuiSourceIsDisplayed().
	358	** Answer whether the source is currently displayed in the source window.
	359	*/
c906108c SS	360	int
	361	#ifdef __STDC__
	362	tuiSourceIsDisplayed (
	363	char *fname)
	364	#else
	365	tuiSourceIsDisplayed (fname)
	366	char *fname;
	367	#endif
	368	{
	369	return (srcWin->generic.contentInUse &&
	370	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
	371	content[0])->whichElement.locator.fileName, fname) == 0));
	372	} /* tuiSourceIsDisplayed */
	373
	374
	375	/*
c5aa993b JM	376	** tuiVerticalSourceScroll().
	377	** Scroll the source forward or backward vertically
	378	*/
c906108c SS	379	void
	380	#ifdef __STDC__
	381	tuiVerticalSourceScroll (
	382	TuiScrollDirection scrollDirection,
	383	int numToScroll)
	384	#else
	385	tuiVerticalSourceScroll (scrollDirection, numToScroll)
	386	TuiScrollDirection scrollDirection;
	387	int numToScroll;
	388	#endif
	389	{
	390	if (srcWin->generic.content != (OpaquePtr) NULL)
	391	{
	392	int line;
	393	Opaque addr;
	394	struct symtab *s;
	395	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
	396
	397	if (current_source_symtab == (struct symtab *) NULL)
	398	s = find_pc_symtab (selected_frame->pc);
	399	else
	400	s = current_source_symtab;
	401
	402	if (scrollDirection == FORWARD_SCROLL)
	403	{
	404	line = content[0]->whichElement.source.lineOrAddr.lineNo +
	405	numToScroll;
	406	if (line > s->nlines)
c5aa993b JM	407	/line = s->nlines - winInfo->generic.contentSize + 1; /
c5aa993b JM	408	/elz: fix for dts 23398 /
c906108c SS	409	line = content[0]->whichElement.source.lineOrAddr.lineNo;
	410	}
	411	else
	412	{
	413	line = content[0]->whichElement.source.lineOrAddr.lineNo -
	414	numToScroll;
	415	if (line <= 0)
	416	line = 1;
	417	}
	418	tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE);
	419	}
	420
	421	return;
	422	} /* tuiVerticalSourceScroll */
	423
	424
	425	/*****************************************
	426	STATIC LOCAL FUNCTIONS
	427	******************************************/
	428
	429	/*
c5aa993b JM	430	** _hasBreak().
	431	** Answer whether there is a break point at the input line in
	432	** the source file indicated
	433	*/
c906108c SS	434	static struct breakpoint *
	435	#ifdef __STDC__
	436	_hasBreak (
	437	char *sourceFileName,
	438	int lineNo)
	439	#else
	440	_hasBreak (sourceFileName, lineNo)
	441	char *sourceFileName;
	442	int lineNo;
	443	#endif
	444	{
	445	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
	446	struct breakpoint *bp;
	447	extern struct breakpoint *breakpoint_chain;
	448
	449
	450	for (bp = breakpoint_chain;
	451	(bp != (struct breakpoint *) NULL &&
	452	bpWithBreak == (struct breakpoint *) NULL);
	453	bp = bp->next)
	454	if ((strcmp (sourceFileName, bp->source_file) == 0) &&
	455	(lineNo == bp->line_number))
	456	bpWithBreak = bp;
	457
	458	return bpWithBreak;
	459	} /* _hasBreak */