mirror of
https://github.com/darlinghq/darling-gdb.git
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460 lines
12 KiB
C
460 lines
12 KiB
C
/*
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** tuiSource.c
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** This module contains functions for displaying source in the source window
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*/
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#include "defs.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "breakpoint.h"
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#include "source.h"
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#include "tui.h"
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#include "tuiData.h"
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#include "tuiStack.h"
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#include "tuiSourceWin.h"
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#include "tuiSource.h"
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/*****************************************
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** EXTERNAL DATA DECLS **
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******************************************/
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extern int current_source_line;
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extern struct symtab *current_source_symtab;
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/*****************************************
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** STATIC LOCAL FUNCTIONS FORWARD DECLS **
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******************************************/
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static struct breakpoint *_hasBreak (char *, int);
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/*****************************************
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** STATIC LOCAL DATA **
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******************************************/
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/*****************************************
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** PUBLIC FUNCTIONS **
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******************************************/
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/*********************************
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** SOURCE/DISASSEM FUNCTIONS **
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*********************************/
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/*
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** tuiSetSourceContent().
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** Function to display source in the source window.
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*/
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TuiStatus
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#ifdef __STDC__
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tuiSetSourceContent (
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struct symtab *s,
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int lineNo,
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int noerror)
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#else
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tuiSetSourceContent (s, lineNo, noerror)
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struct symtab *s;
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int lineNo;
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int noerror;
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#endif
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{
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TuiStatus ret = TUI_FAILURE;
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if (s != (struct symtab *) NULL && s->filename != (char *) NULL)
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{
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register FILE *stream;
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register int i, desc, c, lineWidth, nlines;
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register char *srcLine;
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if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS)
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{
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lineWidth = srcWin->generic.width - 1;
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/*
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** Take hilite (window border) into account, when calculating
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** the number of lines
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*/
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nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo;
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desc = open_source_file (s);
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if (desc < 0)
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{
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if (!noerror)
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{
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char *name = alloca (strlen (s->filename) + 100);
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sprintf (name, "%s:%d", s->filename, lineNo);
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print_sys_errmsg (name, errno);
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}
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ret = TUI_FAILURE;
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}
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else
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{
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if (s->line_charpos == 0)
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find_source_lines (s, desc);
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if (lineNo < 1 || lineNo > s->nlines)
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{
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close (desc);
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printf_unfiltered (
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"Line number %d out of range; %s has %d lines.\n",
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lineNo, s->filename, s->nlines);
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}
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else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0)
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{
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close (desc);
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perror_with_name (s->filename);
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}
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else
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{
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register int offset, curLineNo, curLine, curLen, threshold;
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TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
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/*
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** Determine the threshold for the length of the line
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** and the offset to start the display
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*/
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offset = srcWin->detail.sourceInfo.horizontalOffset;
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threshold = (lineWidth - 1) + offset;
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stream = fdopen (desc, FOPEN_RT);
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clearerr (stream);
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curLine = 0;
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curLineNo =
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srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo;
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if (offset > 0)
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srcLine = (char *) xmalloc (
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(threshold + 1) * sizeof (char));
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while (curLine < nlines)
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{
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TuiWinElementPtr element = (TuiWinElementPtr)
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srcWin->generic.content[curLine];
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struct breakpoint *bp;
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/* get the first character in the line */
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c = fgetc (stream);
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if (offset == 0)
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srcLine = ((TuiWinElementPtr)
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srcWin->generic.content[
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curLine])->whichElement.source.line;
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/* Init the line with the line number */
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sprintf (srcLine, "%-6d", curLineNo);
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curLen = strlen (srcLine);
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i = curLen -
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((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ());
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while (i < tuiDefaultTabLen ())
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{
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srcLine[curLen] = ' ';
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i++;
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curLen++;
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}
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srcLine[curLen] = (char) 0;
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/*
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** Set whether element is the execution point and
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** whether there is a break point on it.
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*/
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element->whichElement.source.lineOrAddr.lineNo =
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curLineNo;
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element->whichElement.source.isExecPoint =
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(strcmp (((TuiWinElementPtr)
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locator->content[0])->whichElement.locator.fileName,
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s->filename) == 0
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&& curLineNo == ((TuiWinElementPtr)
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locator->content[0])->whichElement.locator.lineNo);
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bp = _hasBreak (s->filename, curLineNo);
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element->whichElement.source.hasBreak =
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(bp != (struct breakpoint *) NULL &&
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(!element->whichElement.source.isExecPoint ||
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(bp->disposition != del || bp->hit_count <= 0)));
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if (c != EOF)
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{
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i = strlen (srcLine) - 1;
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do
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{
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if ((c != '\n') &&
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(c != '\r') && (++i < threshold))
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{
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if (c < 040 && c != '\t')
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{
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srcLine[i++] = '^';
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srcLine[i] = c + 0100;
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}
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else if (c == 0177)
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{
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srcLine[i++] = '^';
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srcLine[i] = '?';
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}
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else
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{ /*
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** Store the charcter in the line
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** buffer. If it is a tab, then
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** translate to the correct number of
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** chars so we don't overwrite our
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** buffer.
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*/
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if (c == '\t')
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{
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int j, maxTabLen = tuiDefaultTabLen ();
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for (j = i - (
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(i / maxTabLen) * maxTabLen);
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((j < maxTabLen) &&
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i < threshold);
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i++, j++)
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srcLine[i] = ' ';
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i--;
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}
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else
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srcLine[i] = c;
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}
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srcLine[i + 1] = 0;
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}
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else
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{ /*
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** if we have not reached EOL, then eat
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** chars until we do
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*/
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while (c != EOF && c != '\n' && c != '\r')
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c = fgetc (stream);
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}
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}
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while (c != EOF && c != '\n' && c != '\r' &&
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i < threshold && (c = fgetc (stream)));
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}
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/* Now copy the line taking the offset into account */
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if (strlen (srcLine) > offset)
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strcpy (((TuiWinElementPtr) srcWin->generic.content[
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curLine])->whichElement.source.line,
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&srcLine[offset]);
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else
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((TuiWinElementPtr)
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srcWin->generic.content[
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curLine])->whichElement.source.line[0] = (char) 0;
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curLine++;
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curLineNo++;
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}
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if (offset > 0)
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tuiFree (srcLine);
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fclose (stream);
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srcWin->generic.contentSize = nlines;
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ret = TUI_SUCCESS;
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}
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}
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}
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}
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return ret;
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} /* tuiSetSourceContent */
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/* elz: this function sets the contents of the source window to empty
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except for a line in the middle with a warning message about the
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source not being available. This function is called by
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tuiEraseSourceContents, which in turn is invoked when the source files
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cannot be accessed */
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void
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#ifdef __STDC__
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tuiSetSourceContentNil (
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TuiWinInfoPtr winInfo,
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char *warning_string)
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#else
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tuiSetSourceContentNil (winInfo, warning_string)
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TuiWinInfoPtr winInfo;
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char *warning_string;
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#endif
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{
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int lineWidth;
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int nLines;
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int curr_line = 0;
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lineWidth = winInfo->generic.width - 1;
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nLines = winInfo->generic.height - 2;
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/* set to empty each line in the window, except for the one
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which contains the message */
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while (curr_line < winInfo->generic.contentSize)
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{
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/* set the information related to each displayed line
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to null: i.e. the line number is 0, there is no bp,
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it is not where the program is stopped */
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TuiWinElementPtr element =
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(TuiWinElementPtr) winInfo->generic.content[curr_line];
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element->whichElement.source.lineOrAddr.lineNo = 0;
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element->whichElement.source.isExecPoint = FALSE;
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element->whichElement.source.hasBreak = FALSE;
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/* set the contents of the line to blank */
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element->whichElement.source.line[0] = (char) 0;
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/* if the current line is in the middle of the screen, then we want to
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display the 'no source available' message in it.
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Note: the 'weird' arithmetic with the line width and height comes from
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the function tuiEraseSourceContent. We need to keep the screen and the
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window's actual contents in synch */
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if (curr_line == (nLines / 2 + 1))
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{
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int i;
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int xpos;
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int warning_length = strlen (warning_string);
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char *srcLine;
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srcLine = element->whichElement.source.line;
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if (warning_length >= ((lineWidth - 1) / 2))
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xpos = 1;
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else
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xpos = (lineWidth - 1) / 2 - warning_length;
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for (i = 0; i < xpos; i++)
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srcLine[i] = ' ';
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sprintf (srcLine + i, "%s", warning_string);
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for (i = xpos + warning_length; i < lineWidth; i++)
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srcLine[i] = ' ';
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srcLine[i] = '\n';
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} /* end if */
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curr_line++;
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} /* end while */
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} /*tuiSetSourceContentNil */
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/*
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** tuiShowSource().
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** Function to display source in the source window. This function
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** initializes the horizontal scroll to 0.
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*/
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void
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#ifdef __STDC__
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tuiShowSource (
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struct symtab *s,
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Opaque line,
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int noerror)
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#else
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tuiShowSource (s, line, noerror)
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struct symtab *s;
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Opaque line;
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int noerror;
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#endif
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{
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srcWin->detail.sourceInfo.horizontalOffset = 0;
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m_tuiShowSourceAsIs (s, line, noerror);
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return;
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} /* tuiShowSource */
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/*
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** tuiSourceIsDisplayed().
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** Answer whether the source is currently displayed in the source window.
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*/
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int
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#ifdef __STDC__
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tuiSourceIsDisplayed (
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char *fname)
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#else
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tuiSourceIsDisplayed (fname)
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char *fname;
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#endif
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{
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return (srcWin->generic.contentInUse &&
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(strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())->
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content[0])->whichElement.locator.fileName, fname) == 0));
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} /* tuiSourceIsDisplayed */
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/*
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** tuiVerticalSourceScroll().
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** Scroll the source forward or backward vertically
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*/
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void
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#ifdef __STDC__
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tuiVerticalSourceScroll (
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TuiScrollDirection scrollDirection,
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int numToScroll)
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#else
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tuiVerticalSourceScroll (scrollDirection, numToScroll)
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TuiScrollDirection scrollDirection;
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int numToScroll;
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#endif
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{
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if (srcWin->generic.content != (OpaquePtr) NULL)
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{
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int line;
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Opaque addr;
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struct symtab *s;
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TuiWinContent content = (TuiWinContent) srcWin->generic.content;
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if (current_source_symtab == (struct symtab *) NULL)
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s = find_pc_symtab (selected_frame->pc);
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else
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s = current_source_symtab;
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if (scrollDirection == FORWARD_SCROLL)
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{
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line = content[0]->whichElement.source.lineOrAddr.lineNo +
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numToScroll;
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if (line > s->nlines)
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/*line = s->nlines - winInfo->generic.contentSize + 1; */
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/*elz: fix for dts 23398 */
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line = content[0]->whichElement.source.lineOrAddr.lineNo;
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}
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else
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{
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line = content[0]->whichElement.source.lineOrAddr.lineNo -
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numToScroll;
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if (line <= 0)
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line = 1;
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}
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tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE);
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}
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return;
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} /* tuiVerticalSourceScroll */
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/*****************************************
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** STATIC LOCAL FUNCTIONS **
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******************************************/
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/*
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** _hasBreak().
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** Answer whether there is a break point at the input line in
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** the source file indicated
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*/
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static struct breakpoint *
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#ifdef __STDC__
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_hasBreak (
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char *sourceFileName,
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int lineNo)
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#else
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_hasBreak (sourceFileName, lineNo)
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char *sourceFileName;
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int lineNo;
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#endif
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{
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struct breakpoint *bpWithBreak = (struct breakpoint *) NULL;
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struct breakpoint *bp;
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extern struct breakpoint *breakpoint_chain;
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for (bp = breakpoint_chain;
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(bp != (struct breakpoint *) NULL &&
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bpWithBreak == (struct breakpoint *) NULL);
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bp = bp->next)
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if ((strcmp (sourceFileName, bp->source_file) == 0) &&
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(lineNo == bp->line_number))
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bpWithBreak = bp;
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return bpWithBreak;
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} /* _hasBreak */
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