/* 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. */ #include "defs.h" #include #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 (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 != 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, Opaque line, int noerror) { 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 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) { 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 * _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 */