Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 465 insertions, 0 deletions

diff --git a/gdb/tui/tuiSource.c b/gdb/tui/tuiSource.c
new file mode 100644
index 0000000..e0259d0
--- /dev/null
+++ b/gdb/tui/tuiSource.c
@@ -0,0 +1,465 @@
+/*
+** 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 */