[thirdparty/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 "tui.h"
#include "tuiData.h"
#include "tuiStack.h"
#include "tuiSourceWin.h"
#include "tuiSource.h"


/*****************************************
** EXTERNAL FUNCTION DECLS                **
******************************************/

extern int open_source_file PARAMS ((struct symtab *));
extern void find_source_lines PARAMS ((struct symtab *, int));

/*****************************************
** 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
03b93bdc DT	1	/*
	2	** tuiSource.c
	3	** This module contains functions for displaying source in the source window
	4	*/
	5
	6	#include "defs.h"
	7	#include <ctype.h>
	8	#include "symtab.h"
	9	#include "frame.h"
	10	#include "breakpoint.h"
	11
	12	#include "tui.h"
	13	#include "tuiData.h"
	14	#include "tuiStack.h"
	15	#include "tuiSourceWin.h"
	16	#include "tuiSource.h"
	17
	18
	19	/*****************************************
	20	EXTERNAL FUNCTION DECLS
	21	******************************************/
	22
	23	extern int open_source_file PARAMS ((struct symtab *));
	24	extern void find_source_lines PARAMS ((struct symtab *, int));
	25
	26	/*****************************************
	27	EXTERNAL DATA DECLS
	28	******************************************/
	29	extern int current_source_line;
	30	extern struct symtab *current_source_symtab;
	31
	32
	33	/*****************************************
	34	STATIC LOCAL FUNCTIONS FORWARD DECLS
	35	******************************************/
	36
	37	static struct breakpoint _hasBreak PARAMS ((char , int));
	38
	39
	40	/*****************************************
	41	STATIC LOCAL DATA
	42	******************************************/
	43
	44
	45	/*****************************************
	46	PUBLIC FUNCTIONS
	47	******************************************/
	48
	49	/*********************************
	50	SOURCE/DISASSEM FUNCTIONS
	51	*********************************/
	52
	53	/*
	54	** tuiSetSourceContent().
	55	** Function to display source in the source window.
	56	*/
	57	TuiStatus
	58	#ifdef __STDC__
	59	tuiSetSourceContent (
	60	struct symtab *s,
	61	int lineNo,
	62	int noerror)
	63	#else
	64	tuiSetSourceContent (s, lineNo, noerror)
65	struct symtab *s;
66	int lineNo;
67	int noerror;
68	#endif
69	{
70	TuiStatus ret = TUI_FAILURE;
71
72	if (s != (struct symtab ) NULL && s->filename != (char ) NULL)
73	{
74	register FILE *stream;
75	register int i, desc, c, lineWidth, nlines;
76	register char *srcLine;
77
78	if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
79	{
80	lineWidth = srcWin->generic.width - 1;
81	/*
82	** Take hilite (window border) into account, when calculating
83	** the number of lines
84	*/
85	nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
86	desc = open_source_file (s);
87	if (desc < 0)
88	{
89	if (!noerror)
90	{
91	char *name = alloca (strlen (s->filename) + 100);
92	sprintf (name, "%s:%d", s->filename, lineNo);
93	print_sys_errmsg (name, errno);
94	}
95	ret = TUI_FAILURE;
96	}
97	else
98	{
99	if (s->line_charpos == 0)
100	find_source_lines (s, desc);
101
102	if (lineNo < 1 \|\| lineNo > s->nlines)
103	{
104	close (desc);
105	printf_unfiltered (
106	"Line number %d out of range; %s has %d lines.\n",
107	lineNo, s->filename, s->nlines);
108	}
109	else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
110	{
111	close (desc);
112	perror_with_name (s->filename);
113	}
114	else
115	{
116	register int offset, curLineNo, curLine, curLen, threshold;
117	TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
118	/*
119	** Determine the threshold for the length of the line
120	** and the offset to start the display
121	*/
122	offset = srcWin->detail.sourceInfo.horizontalOffset;
123	threshold = (lineWidth - 1) + offset;
124	stream = fdopen (desc, FOPEN_RT);
125	clearerr (stream);
126	curLine = 0;
127	curLineNo =
128	srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
129	if (offset > 0)
130	srcLine = (char *) xmalloc (
131	(threshold + 1) * sizeof (char));
132	while (curLine < nlines)
133	{
134	TuiWinElementPtr element = (TuiWinElementPtr)
135	srcWin->generic.content[curLine];
136	struct breakpoint *bp;
137
138	/* get the first character in the line */
139	c = fgetc (stream);
140
141	if (offset == 0)
142	srcLine = ((TuiWinElementPtr)
143	srcWin->generic.content[
144	curLine])->whichElement.source.line;
145	/* Init the line with the line number */
146	sprintf (srcLine, "%-6d", curLineNo);
147	curLen = strlen (srcLine);
148	i = curLen -
149	((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
150	while (i < tuiDefaultTabLen ())
151	{
152	srcLine[curLen] = ' ';
153	i++;
154	curLen++;
155	}
156	srcLine[curLen] = (char) 0;
157
158	/*
159	** Set whether element is the execution point and
160	** whether there is a break point on it.
161	*/
162	element->whichElement.source.lineOrAddr.lineNo =
163	curLineNo;
164	element->whichElement.source.isExecPoint =
165	(strcmp (((TuiWinElementPtr)
166	locator->content[0])->whichElement.locator.fileName,
167	s->filename) == 0
168	&& curLineNo == ((TuiWinElementPtr)
169	locator->content[0])->whichElement.locator.lineNo);
170	bp = _hasBreak (s->filename, curLineNo);
171	element->whichElement.source.hasBreak =
172	(bp != (struct breakpoint *) NULL &&
173	(!element->whichElement.source.isExecPoint \|\|
174	(bp->disposition != del \|\| bp->hit_count <= 0)));
175	if (c != EOF)
176	{
177	i = strlen (srcLine) - 1;
178	do
179	{
180	if ((c != '\n') &&
181	(c != '\r') && (++i < threshold))
182	{
183	if (c < 040 && c != '\t')
184	{
185	srcLine[i++] = '^';
186	srcLine[i] = c + 0100;
187	}
188	else if (c == 0177)
189	{
190	srcLine[i++] = '^';
191	srcLine[i] = '?';
192	}
193	else
194	{ /*
195	** Store the charcter in the line
196	** buffer. If it is a tab, then
197	** translate to the correct number of
198	** chars so we don't overwrite our
199	** buffer.
200	*/
201	if (c == '\t')
202	{
203	int j, maxTabLen = tuiDefaultTabLen ();
204
205	for (j = i - (
206	(i / maxTabLen) * maxTabLen);
207	((j < maxTabLen) &&
208	i < threshold);
209	i++, j++)
210	srcLine[i] = ' ';
211	i--;
212	}
213	else
214	srcLine[i] = c;
215	}
216	srcLine[i + 1] = 0;
217	}
218	else
219	{ /*
220	** if we have not reached EOL, then eat
221	** chars until we do
222	*/
223	while (c != EOF && c != '\n' && c != '\r')
224	c = fgetc (stream);
225	}
226	}
227	while (c != EOF && c != '\n' && c != '\r' &&
228	i < threshold && (c = fgetc (stream)));
229	}
230	/* Now copy the line taking the offset into account */
231	if (strlen (srcLine) > offset)
232	strcpy (((TuiWinElementPtr) srcWin->generic.content[
233	curLine])->whichElement.source.line,
234	&srcLine[offset]);
235	else
236	((TuiWinElementPtr)
237	srcWin->generic.content[
238	curLine])->whichElement.source.line[0] = (char) 0;
239	curLine++;
240	curLineNo++;
241	}
242	if (offset > 0)
243	tuiFree (srcLine);
244	fclose (stream);
245	srcWin->generic.contentSize = nlines;
246	ret = TUI_SUCCESS;
247	}
248	}
249	}
250	}
251	return ret;
252	} /* tuiSetSourceContent */
253
254
255	/* elz: this function sets the contents of the source window to empty
256	except for a line in the middle with a warning message about the
257	source not being available. This function is called by
258	tuiEraseSourceContents, which in turn is invoked when the source files
259	cannot be accessed*/
260
261	void
262	#ifdef __STDC__
263	tuiSetSourceContentNil (
264	TuiWinInfoPtr winInfo,
265	char *warning_string)
266	#else
267	tuiSetSourceContentNil (winInfo, warning_string)
268	TuiWinInfoPtr winInfo;
269	char *warning_string;
270	#endif
271	{
272	int lineWidth;
273	int nLines;
274	int curr_line = 0;
275
276	lineWidth = winInfo->generic.width - 1;
277	nLines = winInfo->generic.height - 2;
278
279	/* set to empty each line in the window, except for the one
280	which contains the message*/
281	while (curr_line < winInfo->generic.contentSize)
282	{
283	/* set the information related to each displayed line
284	to null: i.e. the line number is 0, there is no bp,
285	it is not where the program is stopped */
286
287	TuiWinElementPtr element =
288	(TuiWinElementPtr) winInfo->generic.content[curr_line];
289	element->whichElement.source.lineOrAddr.lineNo = 0;
290	element->whichElement.source.isExecPoint = FALSE;
291	element->whichElement.source.hasBreak = FALSE;
292
293	/* set the contents of the line to blank*/
294	element->whichElement.source.line[0] = (char) 0;
295
296	/* if the current line is in the middle of the screen, then we want to
297	display the 'no source available' message in it.
298	Note: the 'weird' arithmetic with the line width and height comes from
299	the function tuiEraseSourceContent. We need to keep the screen and the
300	window's actual contents in synch */
301
302	if (curr_line == (nLines / 2 + 1))
303	{
304	int i;
305	int xpos;
306	int warning_length = strlen (warning_string);
307	char *srcLine;
308
309	srcLine = element->whichElement.source.line;
310
311	if (warning_length >= ((lineWidth - 1) / 2))
312	xpos = 1;
313	else
314	xpos = (lineWidth - 1) / 2 - warning_length;
315
316	for (i = 0; i < xpos; i++)
317	srcLine[i] = ' ';
318
319	sprintf (srcLine + i, "%s", warning_string);
320
321	for (i = xpos + warning_length; i < lineWidth; i++)
322	srcLine[i] = ' ';
323
324	srcLine[i] = '\n';
325
326	} /* end if */
327
328	curr_line++;
329
330	} /* end while*/
331
332	} /tuiSetSourceContentNil/
333
334
335
336
337	/*
338	** tuiShowSource().
339	** Function to display source in the source window. This function
340	** initializes the horizontal scroll to 0.
341	*/
342	void
343	#ifdef __STDC__
344	tuiShowSource (
345	struct symtab *s,
346	Opaque line,
347	int noerror)
348	#else
349	tuiShowSource (s, line, noerror)
350	struct symtab *s;
351	Opaque line;
352	int noerror;
353	#endif
354	{
355	srcWin->detail.sourceInfo.horizontalOffset = 0;
356	m_tuiShowSourceAsIs (s, line, noerror);
357
358	return;
359	} /* tuiShowSource */
360
361
362	/*
363	** tuiSourceIsDisplayed().
364	** Answer whether the source is currently displayed in the source window.
365	*/
366	int
367	#ifdef __STDC__
368	tuiSourceIsDisplayed (
369	char *fname)
370	#else
371	tuiSourceIsDisplayed (fname)
372	char *fname;
373	#endif
374	{
375	return (srcWin->generic.contentInUse &&
376	(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
377	content[0])->whichElement.locator.fileName, fname) == 0));
378	} /* tuiSourceIsDisplayed */
379
380
381	/*
382	** tuiVerticalSourceScroll().
383	** Scroll the source forward or backward vertically
384	*/
385	void
386	#ifdef __STDC__
387	tuiVerticalSourceScroll (
388	TuiScrollDirection scrollDirection,
389	int numToScroll)
390	#else
391	tuiVerticalSourceScroll (scrollDirection, numToScroll)
392	TuiScrollDirection scrollDirection;
393	int numToScroll;
394	#endif
395	{
396	if (srcWin->generic.content != (OpaquePtr) NULL)
397	{
398	int line;
399	Opaque addr;
400	struct symtab *s;
401	TuiWinContent content = (TuiWinContent) srcWin->generic.content;
402
403	if (current_source_symtab == (struct symtab *) NULL)
404	s = find_pc_symtab (selected_frame->pc);
405	else
406	s = current_source_symtab;
407
408	if (scrollDirection == FORWARD_SCROLL)
409	{
410	line = content[0]->whichElement.source.lineOrAddr.lineNo +
411	numToScroll;
412	if (line > s->nlines)
413	/line = s->nlines - winInfo->generic.contentSize + 1;/
414	/elz: fix for dts 23398/
415	line = content[0]->whichElement.source.lineOrAddr.lineNo;
416	}
417	else
418	{
419	line = content[0]->whichElement.source.lineOrAddr.lineNo -
420	numToScroll;
421	if (line <= 0)
422	line = 1;
423	}
424	tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE);
425	}
426
427	return;
428	} /* tuiVerticalSourceScroll */
429
430
431	/*****************************************
432	STATIC LOCAL FUNCTIONS
433	******************************************/
434
435	/*
436	** _hasBreak().
437	** Answer whether there is a break point at the input line in
438	** the source file indicated
439	*/
440	static struct breakpoint *
441	#ifdef __STDC__
442	_hasBreak (
443	char *sourceFileName,
444	int lineNo)
445	#else
446	_hasBreak (sourceFileName, lineNo)
447	char *sourceFileName;
448	int lineNo;
449	#endif
450	{
451	struct breakpoint bpWithBreak = (struct breakpoint ) NULL;
452	struct breakpoint *bp;
453	extern struct breakpoint *breakpoint_chain;
454
455
456	for (bp = breakpoint_chain;
457	(bp != (struct breakpoint *) NULL &&
458	bpWithBreak == (struct breakpoint *) NULL);
459	bp = bp->next)
460	if ((strcmp (sourceFileName, bp->source_file) == 0) &&
461	(lineNo == bp->line_number))
462	bpWithBreak = bp;
463
464	return bpWithBreak;
465	} /* _hasBreak */