Added libXaw-1.0.7

1 files changed, 1886 insertions, 0 deletions

diff --git a/libXaw/src/AsciiSrc.c b/libXaw/src/AsciiSrc.c
new file mode 100644
index 000000000..eb569fc9f
--- /dev/null
+++ b/libXaw/src/AsciiSrc.c
@@ -0,0 +1,1886 @@
+/* $Xorg: AsciiSrc.c,v 1.4 2001/02/09 02:03:42 xorgcvs Exp $ */
+
+/*
+
+Copyright 1989, 1994, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+/* $XFree86: xc/lib/Xaw/AsciiSrc.c,v 1.33 2002/07/04 17:04:20 paulo Exp $ */
+
+/*
+ * AsciiSrc.c - AsciiSrc object. (For use with the text widget).
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <X11/Xos.h>
+#include <X11/Xfuncs.h>
+#include <X11/Xmu/CharSet.h>
+#include <X11/Xmu/Misc.h>
+#include <X11/Xaw/XawInit.h>
+#include <X11/Xaw/AsciiSrcP.h>
+#include <X11/Xaw/MultiSrcP.h>
+#ifndef OLDXAW
+#include <X11/Xaw/TextSinkP.h>
+#include <X11/Xaw/AsciiSinkP.h>
+#endif
+#include "Private.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#if (defined(ASCII_STRING) || defined(ASCII_DISK))
+#include <X11/Xaw/AsciiText.h>		/* for Widget Classes */
+#endif
+
+#ifdef X_NOT_POSIX
+#define Off_t long
+#define Size_t unsigned int
+#else
+#define Off_t off_t
+#define Size_t size_t
+#endif
+
+#define MAGIC_VALUE	((XawTextPosition)-1)
+#define streq(a, b)	(strcmp((a), (b)) == 0)
+
+/*
+ * Class Methods
+ */
+static void XawAsciiSrcClassInitialize(void);
+static void XawAsciiSrcDestroy(Widget);
+static void XawAsciiSrcGetValuesHook(Widget, ArgList, Cardinal*);
+static void XawAsciiSrcInitialize(Widget, Widget, ArgList, Cardinal*);
+static Boolean XawAsciiSrcSetValues(Widget, Widget, Widget,
+				    ArgList, Cardinal*);
+static XawTextPosition ReadText(Widget, XawTextPosition, XawTextBlock*, int);
+static int ReplaceText(Widget, XawTextPosition, XawTextPosition,
+		       XawTextBlock*);
+static XawTextPosition Scan(Widget, XawTextPosition, XawTextScanType,
+			    XawTextScanDirection, int, Bool);
+static XawTextPosition Search(Widget, XawTextPosition, XawTextScanDirection,
+			      XawTextBlock*);
+
+/*
+ * Prototypes
+ */
+static Piece *AllocNewPiece(AsciiSrcObject, Piece*);
+static void BreakPiece(AsciiSrcObject, Piece*);
+static Boolean CvtAsciiTypeToString(Display*, XrmValuePtr, Cardinal*,
+				    XrmValuePtr, XrmValuePtr, XtPointer*);
+static void CvtStringToAsciiType(XrmValuePtr, Cardinal*,
+				 XrmValuePtr, XrmValuePtr);
+static Piece *FindPiece(AsciiSrcObject, XawTextPosition, XawTextPosition*);
+static void FreeAllPieces(AsciiSrcObject);
+static FILE *InitStringOrFile(AsciiSrcObject, Bool);
+static void LoadPieces(AsciiSrcObject, FILE*, char*);
+static void RemoveOldStringOrFile(AsciiSrcObject, Bool);
+static void RemovePiece(AsciiSrcObject, Piece*);
+static String StorePiecesInString(AsciiSrcObject);
+static Bool WriteToFile(String, String, unsigned);
+static Bool WritePiecesToFile(AsciiSrcObject, String);
+static void GetDefaultPieceSize(Widget, int, XrmValue*);
+
+/*
+ * More Prototypes
+ */
+#ifdef ASCII_DISK
+Widget XawAsciiDiskSourceCreate(Widget, ArgList, Cardinal);
+#endif
+#ifdef ASCII_STRING
+Widget XawStringSourceCreate(Widget, ArgList, Cardinal);
+void XawTextSetLastPos(Widget, XawTextPosition);
+#endif
+
+/*
+ * Initialization
+ */
+#define offset(field) XtOffsetOf(AsciiSrcRec, ascii_src.field)
+static XtResource resources[] = {
+  {
+    XtNstring,
+    XtCString,
+    XtRString,
+    sizeof(char*),
+    offset(string),
+    XtRString,
+    NULL
+  },
+  {
+    XtNtype,
+    XtCType,
+    XtRAsciiType,
+    sizeof(XawAsciiType),
+    offset(type),
+    XtRImmediate,
+    (XtPointer)XawAsciiString
+  },
+  {
+    XtNdataCompression,
+    XtCDataCompression,
+    XtRBoolean,
+    sizeof(Boolean),
+    offset(data_compression),
+    XtRImmediate,
+    (XtPointer)True
+  },
+  {
+    XtNpieceSize,
+    XtCPieceSize,
+    XtRInt,
+    sizeof(XawTextPosition),
+    offset(piece_size),
+    XtRCallProc,
+    (XtPointer)GetDefaultPieceSize
+  },
+#ifdef OLDXAW
+  {
+    XtNcallback,
+    XtCCallback,
+    XtRCallback,
+    sizeof(XtPointer), 
+    offset(callback),
+    XtRCallback,
+    (XtPointer)NULL
+  },
+#endif
+  {
+    XtNuseStringInPlace,
+    XtCUseStringInPlace,
+    XtRBoolean,
+    sizeof(Boolean),
+    offset(use_string_in_place),
+    XtRImmediate,
+    (XtPointer)False
+  },
+  {
+    XtNlength,
+    XtCLength,
+    XtRInt,
+    sizeof(int),
+    offset(ascii_length),
+    XtRImmediate,
+    (XtPointer)MAGIC_VALUE
+  },
+#ifdef ASCII_DISK
+  {
+    XtNfile,
+    XtCFile,
+    XtRString,
+    sizeof(String),
+    offset(filename),
+    XtRString,
+    NULL
+  },
+#endif /* ASCII_DISK */
+};
+#undef offset
+
+
+#define Superclass	(&textSrcClassRec)
+AsciiSrcClassRec asciiSrcClassRec = {
+  /* object */
+  {
+    (WidgetClass)Superclass,		/* superclass */
+    "AsciiSrc",				/* class_name */
+    sizeof(AsciiSrcRec),		/* widget_size */
+    XawAsciiSrcClassInitialize,		/* class_initialize */
+    NULL,				/* class_part_initialize */
+    False,				/* class_inited */
+    XawAsciiSrcInitialize,		/* initialize */
+    NULL,				/* initialize_hook */
+    NULL,				/* realize */
+    NULL,				/* actions */
+    0,					/* num_actions */
+    resources,				/* resources */
+    XtNumber(resources),		/* num_resources */
+    NULLQUARK,				/* xrm_class */
+    False,				/* compress_motion */
+    False,				/* compress_exposure */
+    False,				/* compress_enterleave */
+    False,				/* visible_interest */
+    XawAsciiSrcDestroy,			/* destroy */
+    NULL,				/* resize */
+    NULL,				/* expose */
+    XawAsciiSrcSetValues,		/* set_values */
+    NULL,				/* set_values_hook */
+    NULL,				/* set_values_almost */
+    XawAsciiSrcGetValuesHook,		/* get_values_hook */
+    NULL,				/* accept_focus */
+    XtVersion,				/* version */
+    NULL,				/* callback_private */
+    NULL,				/* tm_table */
+    NULL,				/* query_geometry */
+    NULL,				/* display_accelerator */
+    NULL,				/* extension */
+  },
+  /* text_src */
+  {
+    ReadText,				/* Read */
+    ReplaceText,			/* Replace */
+    Scan,				/* Scan */
+    Search,				/* Search */
+    XtInheritSetSelection,		/* SetSelection */
+    XtInheritConvertSelection,		/* ConvertSelection */
+  },
+  /* ascii_src */
+  {
+    NULL,				/* extension */
+  },
+};
+
+WidgetClass asciiSrcObjectClass = (WidgetClass)&asciiSrcClassRec;
+
+static XrmQuark Qstring, Qfile;
+
+/*
+ * Implementation
+ */
+/*
+ * Function:
+ *	XawAsciiSrcClassInitialize()
+ *
+ * Description:
+ *	  Initializes the asciiSrcObjectClass and install the converters for
+ *	AsciiType <-> String.
+ */
+static void
+XawAsciiSrcClassInitialize(void)
+{
+    XawInitializeWidgetSet();
+    Qstring = XrmPermStringToQuark(XtEstring);
+    Qfile = XrmPermStringToQuark(XtEfile);
+    XtAddConverter(XtRString, XtRAsciiType, CvtStringToAsciiType, NULL, 0);
+    XtSetTypeConverter(XtRAsciiType, XtRString, CvtAsciiTypeToString,
+		       NULL, 0, XtCacheNone, NULL);
+}
+
+/*
+ * Function:
+ *	XawAsciiSrcInitialize
+ *
+ * Parameters:
+ *	request	 - widget requested by the argument list
+ *	cnew	 - new widget with both resource and non resource values
+ *	args	 - (unused)
+ *	num_args - (unused)
+ *
+ * Description:
+ *	Initializes the ascii src object.
+ */
+/*ARGSUSED*/
+static void
+XawAsciiSrcInitialize(Widget request, Widget cnew,
+		      ArgList args, Cardinal *num_args)
+{
+    AsciiSrcObject src = (AsciiSrcObject)cnew;
+    FILE *file;
+
+    /*
+     * Set correct flags (override resources) depending upon widget class
+     */
+    src->text_src.text_format = XawFmt8Bit;
+
+#ifdef ASCII_DISK
+    if (XtIsSubclass(XtParent(cnew), asciiDiskWidgetClass)) {
+	src->ascii_src.type = XawAsciiFile;
+	src->ascii_src.string = src->ascii_src.filename;
+    }
+#endif
+
+#ifdef ASCII_STRING
+    if (XtIsSubclass(XtParent(cnew), asciiStringWidgetClass)) {
+	src->ascii_src.use_string_in_place = True;
+	src->ascii_src.type = XawAsciiString;
+    }
+#endif
+
+#ifdef OLDXAW
+    src->ascii_src.changes = False;
+#else
+    src->text_src.changed = False;
+#endif
+    src->ascii_src.allocated_string = False;
+
+    if (src->ascii_src.use_string_in_place && src->ascii_src.string == NULL)
+	src->ascii_src.use_string_in_place = False;
+
+    file = InitStringOrFile(src, src->ascii_src.type == XawAsciiFile);
+    LoadPieces(src, file, NULL);
+
+    if (file != NULL)
+	fclose(file);
+}
+
+/*
+ * Function:
+ *	ReadText
+ *
+ * Parameters:
+ *	w	- AsciiSource widget
+ *	pos	- position of the text to retreive.
+ *	text	- text block that will contain returned text
+ *	length	- maximum number of characters to read
+ *
+ * Description:
+ *	This function reads the source.
+ *
+ * Returns:
+ *	The character position following the retrieved text.
+ */
+static XawTextPosition
+ReadText(Widget w, XawTextPosition pos, XawTextBlock *text, int length)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    XawTextPosition count, start;
+    Piece *piece;
+#ifndef OLDXAW 
+    XawTextAnchor *anchor;
+    XawTextEntity *entity;
+    XawTextPosition offset, end = pos + length;
+    Bool state;
+
+    end = XawMin(end, src->ascii_src.length);
+    while ((state = XawTextSourceAnchorAndEntity(w, pos, &anchor, &entity)) &&
+	(entity->flags & XAW_TENTF_HIDE))
+	pos = anchor->position + entity->offset + entity->length;
+    if (state == False ||
+	!(entity->flags & XAW_TENTF_REPLACE)) {
+	while (entity) {
+	    offset = anchor->position + entity->offset;
+	    if (offset >= end)
+		break;
+	    if (offset > pos &&
+		(entity->flags & (XAW_TENTF_HIDE | XAW_TENTF_REPLACE))) {
+		end = XawMin(end, offset);
+		break;
+	    }
+	    if ((entity = entity->next) == NULL &&
+		(anchor = XawTextSourceNextAnchor(w, anchor)) != NULL)
+		entity = anchor->entities;
+	}
+    }
+    else if (state && (entity->flags & XAW_TENTF_REPLACE) && pos < end) {
+	XawTextBlock *block = (XawTextBlock*)entity->data;
+
+	offset = anchor->position + entity->offset;
+	end = XawMin(end, offset + block->length);
+	if ((length = end - pos) < 0)
+	    length = 0;
+	text->length = length;
+	text->format = XawFmt8Bit;
+	if (length == 0) {
+	    text->firstPos = end = offset + entity->length;
+	    text->ptr = "";
+	}
+	else {
+	    text->firstPos = pos;
+	    text->ptr = block->ptr + (pos - offset);
+	    if (pos + length < offset + block->length)
+		end = pos + length;	/* there is data left to be read */
+	    else
+		end = offset + entity->length;
+	}
+
+	return (end);
+    }
+
+    if ((length = end - pos) < 0)
+	length = 0;
+#endif
+
+    piece = FindPiece(src, pos, &start);
+    text->firstPos = pos;
+    text->ptr = piece->text + (pos - start);
+    count = piece->used - (pos - start);
+    text->length = Max(0, (length > count) ? count : length);
+    text->format = XawFmt8Bit;
+
+    return (pos + text->length);
+}
+
+/*
+ * Function:
+ *	ReplaceText
+ *
+ * Parameters:
+ *	w	 - AsciiSource object
+ *	startPos - ends of text that will be replaced
+ *	endPos	 - ""
+ *	text	 - new text to be inserted into buffer at startPos
+ *
+ * Description:
+ *	Replaces a block of text with new text.
+ *
+ * Returns:
+ *	XawEditDone on success, XawEditError otherwise
+ */
+/*ARGSUSED*/
+static int
+ReplaceText(Widget w, XawTextPosition startPos, XawTextPosition endPos,
+	    XawTextBlock *text)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    Piece *start_piece, *end_piece, *temp_piece;
+    XawTextPosition start_first, end_first;
+    int length, firstPos;
+
+    /*
+     * Editing a read only source is not allowed
+     */
+    if (src->text_src.edit_mode == XawtextRead) 
+	return (XawEditError);
+
+    start_piece = FindPiece(src, startPos, &start_first);
+    end_piece = FindPiece(src, endPos, &end_first);
+
+#ifndef OLDXAW
+    /*
+     * This is a big hack, but I can't think about a clever way to know
+     * if the character being moved forward has a negative lbearing.
+     *
+     */
+    if (start_piece->used) {
+	int i;
+
+	for (i = 0; i < src->text_src.num_text; i++) {
+	    int line;
+	    TextWidget ctx = (TextWidget)src->text_src.text[i];
+
+	    for (line = 0; line < ctx->text.lt.lines; line++)
+		if (startPos < ctx->text.lt.info[line + 1].position)
+		    break;
+	    if (i < ctx->text.lt.lines &&
+		startPos > ctx->text.lt.info[i].position) {
+		AsciiSinkObject sink = (AsciiSinkObject)ctx->text.sink;
+		XawTextAnchor *anchor;
+		XawTextEntity *entity;
+		XawTextProperty *property;
+		XFontStruct *font;
+
+		if (XawTextSourceAnchorAndEntity(w, startPos, &anchor, &entity) &&
+		    (property = XawTextSinkGetProperty(ctx->text.sink,
+						       entity->property)) != NULL &&
+		    (property->mask & XAW_TPROP_FONT))
+		    font = property->font;
+		else
+		    font = sink->ascii_sink.font;
+
+		if (font->min_bounds.lbearing < 0) {
+		    int lbearing = font->min_bounds.lbearing;
+		    unsigned char c = *(unsigned char*)
+			(start_piece->text + (startPos - start_first));
+
+		    if (c == '\t' || c == '\n')
+			c = ' ';
+		    else if ((c & 0177) < XawSP || c == 0177) {
+			if (sink->ascii_sink.display_nonprinting)
+			    c = c > 0177 ? '\\' : c + '^';
+			else
+			    c = ' ';
+		    }
+		    if (font->per_char &&
+			(c >= font->min_char_or_byte2 && c <= font->max_char_or_byte2))
+			lbearing = font->per_char[c - font->min_char_or_byte2].lbearing;
+		    if (lbearing < 0)
+			_XawTextNeedsUpdating(ctx, startPos - 1, startPos);
+		}
+	    }
+	}
+    }
+
+
+#endif
+
+    /*
+     * Remove Old Stuff
+     */
+    if (start_piece != end_piece) {
+	temp_piece = start_piece->next;
+
+	/*
+	 * If empty and not the only piece then remove it.
+	 */
+	if (((start_piece->used = startPos - start_first) == 0)
+	    && !(start_piece->next == NULL && start_piece->prev == NULL))
+	    RemovePiece(src, start_piece);
+
+	while (temp_piece != end_piece) {
+	    temp_piece = temp_piece->next;
+	    RemovePiece(src, temp_piece->prev);
+	}
+
+	end_piece->used -= endPos - end_first;
+	if (end_piece->used != 0)
+	    memmove(end_piece->text, end_piece->text + endPos - end_first,
+		    (unsigned)end_piece->used);
+    }
+    else {		    /* We are fully in one piece */
+	if ((start_piece->used -= endPos - startPos) == 0) {
+	    if (!(start_piece->next == NULL && start_piece->prev == NULL))
+		RemovePiece(src, start_piece);
+	}
+	else {
+	    memmove(start_piece->text + (startPos - start_first),
+		    start_piece->text + (endPos - start_first),
+		    (unsigned)(start_piece->used - (startPos - start_first)));
+	    if (src->ascii_src.use_string_in_place
+		&& src->ascii_src.length - (endPos - startPos)
+		< src->ascii_src.piece_size - 1)
+		start_piece->text[src->ascii_src.length - (endPos - startPos)] =
+		    '\0';
+	}
+    }
+
+    src->ascii_src.length += -(endPos - startPos) + text->length;
+
+    if ( text->length != 0) {
+	/* 
+	 * Put in the New Stuff
+	 */
+	start_piece = FindPiece(src, startPos, &start_first);
+
+	length = text->length;
+	firstPos = text->firstPos;
+
+	while (length > 0) {
+	    char *ptr;
+	    int fill;
+
+	    if (src->ascii_src.use_string_in_place) {
+		if (start_piece->used == src->ascii_src.piece_size - 1) {
+		    /*
+		     * If we are in ascii string emulation mode. Then the
+		     *	string is not allowed to grow
+		     */
+		    start_piece->used = src->ascii_src.length =
+			src->ascii_src.piece_size - 1;
+		    start_piece->text[src->ascii_src.length] = '\0';
+		    return (XawEditError);
+		}
+	    }
+
+	    if (start_piece->used == src->ascii_src.piece_size) {
+		BreakPiece(src, start_piece);
+		start_piece = FindPiece(src, startPos, &start_first);
+	    }
+
+	    fill = Min((int)(src->ascii_src.piece_size - start_piece->used),
+		       length);
+
+	    ptr = start_piece->text + (startPos - start_first);
+	    memmove(ptr + fill, ptr,
+		    (unsigned)(start_piece->used - (startPos - start_first)));
+	    memcpy(ptr, text->ptr + firstPos, (unsigned)fill);
+
+	    startPos += fill;
+	    firstPos += fill;
+	    start_piece->used += fill;
+	    length -= fill;
+	}
+    }
+
+    if (src->ascii_src.use_string_in_place)
+	start_piece->text[start_piece->used] = '\0';
+
+#ifdef OLDXAW
+    src->ascii_src.changes = True;
+    XtCallCallbacks(w, XtNcallback, NULL);
+#endif
+
+    return (XawEditDone);
+}
+
+/*
+ * Function:
+ *	Scan
+ *
+ * Parameters:
+ *	w	 - AsciiSource object
+ *	position - position to start scanning
+ *	type	 - type of thing to scan for
+ *	dir	 - direction to scan
+ *		   count - which occurance if this thing to search for.
+ *		   include - whether or not to include the character found in
+ *		   the position that is returned
+ *
+ * Description:
+ *	Scans the text source for the number and type of item specified.
+ *
+ * Returns:
+ *	The position of the item found
+ *
+ * Note:
+ *	  While there are only 'n' characters in the file there are n+1
+ *	 possible cursor positions (one before the first character and
+ *	one after the last character
+ */
+static XawTextPosition
+Scan(Widget w, register XawTextPosition position, XawTextScanType type,
+     XawTextScanDirection dir, int count, Bool include)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    Piece *piece;
+    XawTextPosition first, first_eol_position = 0;
+    register char *ptr, *lim;
+    register int cnt = count;
+    register unsigned char c;
+
+    if (dir == XawsdLeft) {
+	if (position <= 0)
+	    return (0);
+	--position;
+    }
+    else if (position >= src->ascii_src.length)
+	return (src->ascii_src.length);
+
+    piece = FindPiece(src, position, &first);
+    if (piece->used == 0)
+	return (0);
+
+    ptr = (position - first) + piece->text;
+
+    if (dir == XawsdRight) {
+	lim = piece->text + piece->used;
+	switch (type) {
+	    case XawstEOL:
+	    case XawstParagraph:
+	    case XawstWhiteSpace:
+	    case XawstAlphaNumeric:
+		for (; cnt > 0; cnt--) {
+		    Bool non_space = False, first_eol = True;
+
+		    /*CONSTCOND*/
+		    while (True) {
+			if (ptr >= lim) {
+			    piece = piece->next;
+			    if (piece == NULL)	/* End of text */
+				return (src->ascii_src.length);
+			    ptr = piece->text;
+			    lim = piece->text + piece->used;
+			}
+
+			c = *ptr++;
+			++position;
+
+			if (type == XawstEOL) {
+			    if (c == '\n')
+				break;
+			}
+			else if (type == XawstAlphaNumeric) {
+			    if (!isalnum(c)) {
+				if (non_space)
+				    break;
+			    }
+			    else
+				non_space = True;
+			}
+			else if (type == XawstWhiteSpace) {
+			    if (isspace(c)) {
+				if (non_space)
+				    break;
+			    }
+			    else
+				non_space = True;
+			}
+			else {	/* XawstParagraph */
+			    if (first_eol) {
+				if (c == '\n') {
+				    first_eol_position = position;
+				    first_eol = False;
+				}
+			    }
+			    else if (c == '\n')
+				break;
+			    else if (!isspace(c))
+				first_eol = True;
+			}
+		    }
+		}
+		break;
+	    case XawstPositions:
+		position += count;
+		return (position < src->ascii_src.length ?
+			position : src->ascii_src.length);
+	    case XawstAll:
+		return (src->ascii_src.length);
+	    default:
+		break;
+	}
+	if (!include) {
+	    if (type == XawstParagraph)
+		position = first_eol_position;
+	    if (count)
+		--position;
+	}
+    }
+    else {
+	lim = piece->text;
+	switch (type) {
+	    case XawstEOL:
+	    case XawstParagraph:
+	    case XawstWhiteSpace:
+	    case XawstAlphaNumeric:
+		for (; cnt > 0; cnt--) {
+		    Bool non_space = False, first_eol = True;
+
+		    /*CONSTCOND*/
+		    while (True) {
+			if (ptr < lim) {
+			    piece = piece->prev;
+			    if (piece == NULL)	/* Begining of text */
+				return (0);
+			    ptr = piece->text + piece->used - 1;
+			    lim = piece->text;
+			}
+
+			c = *ptr--;
+			--position;
+
+			if (type == XawstEOL) {
+			    if (c == '\n')
+				break;
+			}
+			else if (type == XawstAlphaNumeric) {
+			    if (!isalnum(c)) {
+				if (non_space)
+				    break;
+			    }
+			    else
+				non_space = True;
+			}
+			else if (type == XawstWhiteSpace) {
+			    if (isspace(c)) {
+				if (non_space)
+				    break;
+			    }
+			    else
+				non_space = True;
+			}
+			else {	/* XawstParagraph */
+			    if (first_eol) {
+				if (c == '\n') {
+				    first_eol_position = position;
+				    first_eol = False;
+				}
+			    }
+			    else if (c == '\n')
+				break;
+			    else if (!isspace(c))
+				first_eol = True;
+			}
+		    }
+		}
+		break;
+	    case XawstPositions:
+		position -= count - 1;
+		return (position > 0 ? position : 0);
+	    case XawstAll:
+		return (0);
+	    default:
+		break;
+	}
+	if (!include) {
+	    if (type == XawstParagraph)
+		position = first_eol_position;
+	    if (count)
+		++position;
+	}
+	position++;
+    }
+
+    return (position);
+}
+
+/*
+ * Function:
+ *	Search
+ *
+ * Parameters:
+ *	w	 - AsciiSource object
+ *	position - the position to start scanning
+ *	dir	 - direction to scan
+ *	text	 - text block to search for
+ *
+ * Description:
+ *	Searchs the text source for the text block passed.
+ *
+ * Returns:
+ *	The position of the item found
+ */
+static XawTextPosition 
+Search(Widget w, register XawTextPosition position, XawTextScanDirection dir,
+       XawTextBlock *text)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    register int count = 0;
+    register char *ptr, c;
+    char *str;
+    Piece *piece;
+    char *buf;
+    XawTextPosition first;
+    int cnt, case_sensitive;
+
+    if (dir == XawsdLeft) {
+	if (position == 0)
+	    return (XawTextSearchError);
+	position--;
+    }
+
+    buf = XtMalloc((unsigned)sizeof(unsigned char) * text->length);
+    memcpy(buf, text->ptr, (unsigned)text->length);
+    piece = FindPiece(src, position, &first);
+    ptr = (position - first) + piece->text;
+    case_sensitive = text->firstPos;
+
+    if (dir == XawsdRight) {
+	str = buf;
+	c = *str;
+	/*CONSTCOND*/
+	while (1) {
+	    if (*ptr++ == c
+		|| (case_sensitive && isalpha(c) && isalpha(ptr[-1])
+		    && toupper(c) == toupper(ptr[-1]))) {
+		if (++count == text->length)
+		    break;
+		c = *++str;
+	    }
+	    else if (count) {
+		ptr -= count;
+		str -= count;
+		position -= count;
+		count = 0;
+		c = *str;
+
+		if (ptr < piece->text) {
+		    do {
+			cnt = piece->text - ptr;
+			piece = piece->prev;
+			if (piece == NULL) {
+			    XtFree(buf);
+			    return (XawTextSearchError);
+			}
+			ptr = piece->text + piece->used - cnt;
+		    } while (ptr < piece->text);
+		}
+	    }
+	    position++;
+	    if (ptr >= (piece->text + piece->used)) {
+		do {
+		    cnt = ptr - (piece->text + piece->used);
+		    piece = piece->next;
+		    if (piece == NULL) {
+			XtFree(buf);
+			return (XawTextSearchError);
+		    }
+		    ptr = piece->text + cnt;
+		} while (ptr >= (piece->text + piece->used));
+	    }
+	}
+
+	position -= text->length - 1;
+    }
+    else {
+	str = buf + text->length - 1;
+	c = *str;
+	/*CONSTCOND*/
+	while (1) {
+	    if (*ptr-- == c
+		|| (case_sensitive && isalpha(c) && isalpha(ptr[1])
+		    && toupper(c) == toupper(ptr[1]))) {
+		if (++count == text->length)
+		    break;
+		c = *--str;
+	    }
+	    else if (count) {
+		ptr += count;
+		str += count;
+		position += count;
+		count = 0;
+		c = *str;
+
+		if (ptr >= (piece->text + piece->used)) {
+		    do {
+			cnt = ptr - (piece->text + piece->used);
+			piece = piece->next;
+			if (piece == NULL) {
+			    XtFree(buf);
+			    return (XawTextSearchError);
+			}
+			ptr = piece->text + cnt;
+		    } while (ptr >= (piece->text + piece->used));
+		}
+	    }
+	    position--;
+	    if (ptr < piece->text) {
+		do {
+		    cnt = piece->text - ptr;
+		    piece = piece->prev;
+		    if (piece == NULL) {
+			XtFree(buf);
+			return (XawTextSearchError);
+		    }
+		    ptr = piece->text + piece->used - cnt;
+		} while (ptr < piece->text);
+	    }
+	}
+    }
+
+    XtFree(buf);
+
+    return (position);
+}
+
+/*
+ * Function:
+ *	XawAsciiSrcSetValues
+ *
+ * Parameters:
+ *	current  - current state of the widget
+ *	request  - what was requested
+ *	cnew	 - what the widget will become
+ *	args	 - representation of changed resources
+ *	num_args - number of resources that have changed
+ *
+ * Description:
+ *	Sets the values for the AsciiSource.
+ *
+ * Returns:
+ *	True if redisplay is needed
+ */
+static Boolean
+XawAsciiSrcSetValues(Widget current, Widget request, Widget cnew,
+		     ArgList args, Cardinal *num_args)
+{
+    AsciiSrcObject src = (AsciiSrcObject)cnew;
+    AsciiSrcObject old_src = (AsciiSrcObject)current;
+    Bool total_reset = False, string_set = False;
+    FILE *file;
+    unsigned int i;
+
+    if (old_src->ascii_src.use_string_in_place
+	!= src->ascii_src.use_string_in_place) {
+	XtAppWarning(XtWidgetToApplicationContext(cnew),
+		     "AsciiSrc: The XtNuseStringInPlace resource may "
+		     "not be changed.");
+	src->ascii_src.use_string_in_place =
+	    old_src->ascii_src.use_string_in_place;
+    }
+
+    for (i = 0; i < *num_args ; i++)
+	if (streq(args[i].name, XtNstring)) {
+	    string_set = True;
+	    break;
+	}
+
+    if (string_set || (old_src->ascii_src.type != src->ascii_src.type)) {
+	RemoveOldStringOrFile(old_src, string_set); /* remove old info */
+	file = InitStringOrFile(src, string_set);   /* Init new info */
+	LoadPieces(src, file, NULL);   /* load new info into internal buffers */
+	if (file != NULL)
+	    fclose(file);
+#ifndef OLDXAW
+	for (i = 0; i < src->text_src.num_text; i++)
+	    /* Tell text widget what happened */
+	    XawTextSetSource(src->text_src.text[i], cnew, 0);
+#else
+	XawTextSetSource(XtParent(cnew), cnew, 0);
+#endif
+	total_reset = True;
+    }
+
+    if (old_src->ascii_src.ascii_length != src->ascii_src.ascii_length)
+	src->ascii_src.piece_size = src->ascii_src.ascii_length + 1;
+
+    if (!total_reset &&
+	old_src->ascii_src.piece_size != src->ascii_src.piece_size) {
+	String string = StorePiecesInString(old_src);
+
+	FreeAllPieces(old_src);
+	LoadPieces(src, NULL, string);
+	XtFree(string);
+    }
+
+    return (False);
+}
+
+/*
+ * Function:
+ *	XawAsciiSrcGetValuesHook
+ *
+ * Parameters:
+ *	w	 - AsciiSource Widget
+ *	args	 - argument list
+ *	num_args - number of args
+ *
+ * Description:
+ *	  This is a get values hook routine that sets the
+ *		     values specific to the ascii source.
+ */
+static void
+XawAsciiSrcGetValuesHook(Widget w, ArgList args, Cardinal *num_args)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    unsigned int i;
+
+    if (src->ascii_src.type == XawAsciiString) {
+	for (i = 0; i < *num_args ; i++)
+	    if (streq(args[i].name, XtNstring)) {
+		if (src->ascii_src.use_string_in_place)
+		    *((char **)args[i].value) = src->ascii_src.first_piece->text;
+		else if (XawAsciiSave(w))   /* If save sucessful */
+		    *((char **)args[i].value) = src->ascii_src.string;
+		break;
+	    }
+	}
+    }
+
+/*
+ * Function:
+ *	XawAsciiSrcDestroy
+ *
+ * Parameters:
+ *	src - Ascii source object to free
+ *
+ * Description:
+ *	Destroys an ascii source (frees all data)
+ */
+static void
+XawAsciiSrcDestroy(Widget w)
+{
+    RemoveOldStringOrFile((AsciiSrcObject) w, True);
+}
+
+/*
+ * Public routines 
+ */
+/*
+ * Function:
+ *	XawAsciiSourceFreeString
+ *
+ * Parameters:
+ *	w - AsciiSrc widget
+ *
+ * Description:
+ *	  Frees the string returned by a get values call
+ *		     on the string when the source is of type string.
+ */
+void
+XawAsciiSourceFreeString(Widget w)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+
+    /* If the src is really a multi, call the multi routine */
+    if (XtIsSubclass(w, multiSrcObjectClass)) {
+	_XawMultiSourceFreeString(w);
+	return;
+    }
+    else if (!XtIsSubclass(w, asciiSrcObjectClass)) {
+	XtErrorMsg("bad argument", "asciiSource", "XawError",
+		   "XawAsciiSourceFreeString's parameter must be "
+		   "an asciiSrc or multiSrc.",
+		   NULL, NULL);
+    }
+
+    if (src->ascii_src.allocated_string && src->ascii_src.type != XawAsciiFile) {
+	src->ascii_src.allocated_string = False;
+	XtFree(src->ascii_src.string);
+	src->ascii_src.string = NULL;
+    }
+}
+
+/*
+ * Function:
+ *	XawAsciiSave
+ *
+ * Parameters:
+ *	w - asciiSrc Widget
+ *
+ * Description:
+ *	Saves all the pieces into a file or string as required.
+ *
+ * Returns:
+ *	True if the save was successful
+ */
+Bool
+XawAsciiSave(Widget w)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+
+    /* If the src is really a multi, call the multi save */
+    if (XtIsSubclass(w, multiSrcObjectClass ))
+	return (_XawMultiSave(w));
+
+    else if (!XtIsSubclass(w, asciiSrcObjectClass))
+	XtErrorMsg("bad argument", "asciiSource", "XawError",
+		   "XawAsciiSave's parameter must be an asciiSrc or multiSrc.",
+		   NULL, NULL);
+
+    /*
+     * If using the string in place then there is no need to play games
+     * to get the internal info into a readable string.
+     */
+    if (src->ascii_src.use_string_in_place) 
+	return (True);
+
+    if (src->ascii_src.type == XawAsciiFile) {
+#ifdef OLDXAW
+	if (!src->ascii_src.changes)
+#else
+	if (!src->text_src.changed) 		/* No changes to save */
+#endif
+	    return (True);
+
+	if (WritePiecesToFile(src, src->ascii_src.string) == False)
+	    return (False);
+    }
+    else  {
+	if (src->ascii_src.allocated_string == True)
+	    XtFree(src->ascii_src.string);
+	else
+	    src->ascii_src.allocated_string = True;
+
+	src->ascii_src.string = StorePiecesInString(src);
+    }
+#ifdef OLDXAW
+    src->ascii_src.changes = False;
+#else
+    src->text_src.changed = False;
+#endif
+
+    return (True);
+}
+
+/*
+ * Function:
+ *	XawAsciiSaveAsFile
+ *
+ * Arguments:
+ *	w    - AsciiSrc widget
+ *	name - name of the file to save this file into
+ *
+ * Description:
+ *	Save the current buffer as a file.
+ *
+ * Returns:
+ *	True if the save was sucessful
+ */
+Bool
+XawAsciiSaveAsFile(Widget w, _Xconst char *name)
+{
+    AsciiSrcObject src = (AsciiSrcObject)w;
+    Bool ret;
+
+    /* If the src is really a multi, call the multi save */
+
+    if (XtIsSubclass( w, multiSrcObjectClass))
+	return (_XawMultiSaveAsFile(w, name));
+
+    else if (!XtIsSubclass(w, asciiSrcObjectClass))
+	XtErrorMsg("bad argument", "asciiSource", "XawError",
+		   "XawAsciiSaveAsFile's 1st parameter must be an "
+		   "asciiSrc or multiSrc.",
+		   NULL, NULL);
+
+    if (src->ascii_src.type == XawAsciiFile)
+	ret = WritePiecesToFile(src, (String)name);
+    else {
+	String string = StorePiecesInString(src); 
+
+	ret = WriteToFile(string, (String)name, src->ascii_src.length);
+	XtFree(string);
+    }
+
+    return (ret);
+}
+
+/*
+ * Function:
+ *	XawAsciiSourceChanged
+ *
+ * Parameters:
+ *	w - ascii source widget
+ *
+ * Description:
+ *	Returns true if the source has changed since last saved.
+ *
+ * Returns:
+ *	A Boolean (see description).
+ */
+Bool
+XawAsciiSourceChanged(Widget w)
+{
+#ifdef OLDXAW
+    if (XtIsSubclass(w, multiSrcObjectClass))
+	return (((MultiSrcObject)w)->multi_src.changes);
+
+    if (XtIsSubclass(w, asciiSrcObjectClass))
+	return (((AsciiSrcObject)w)->ascii_src.changes);
+#else
+    if (XtIsSubclass(w, textSrcObjectClass))
+	return (((TextSrcObject)w)->textSrc.changed);
+#endif
+    XtErrorMsg("bad argument", "asciiSource", "XawError",
+	       "XawAsciiSourceChanged parameter must be an "
+	       "asciiSrc or multiSrc.",
+	       NULL, NULL);
+
+    return (True);
+}
+
+/*
+ * Private Functions
+ */
+static void
+RemoveOldStringOrFile(AsciiSrcObject src, Bool checkString) 
+{
+    FreeAllPieces(src);
+
+    if (checkString && src->ascii_src.allocated_string) {
+	XtFree(src->ascii_src.string);
+	src->ascii_src.allocated_string = False;
+	src->ascii_src.string = NULL;
+    }
+}
+
+/*
+ * Function:
+ *	WriteToFile
+ *
+ * Parameters:
+ *	string - string to write
+ *	name   - the name of the file
+ *
+ * Description:
+ *	Write the string specified to the begining of the file specified.
+ *
+ * Returns:
+ *	returns True if sucessful, False otherwise
+ */
+static Bool
+WriteToFile(String string, String name, unsigned length)
+{
+    int fd;
+
+    if ((fd = creat(name, 0666)) == -1
+	|| write(fd, string, length) == -1)
+	return (False);
+
+    if (close(fd) == -1)
+	return (False);
+
+    return (True);
+}
+
+/*
+ * Function:
+ *	WritePiecesToFile
+ *
+ * Parameters:
+ *	src  - ascii source object
+ *	name - name of the file
+ *
+ * Description:
+ *	  Almost identical to WriteToFile, but only works for ascii src objects
+ *	of type XawAsciiFile. This function avoids allocating temporary memory,
+ *	what can be useful when editing very large files.
+ *
+ * Returns:
+ *	returns True if sucessful, False otherwise
+ */
+static Bool
+WritePiecesToFile(AsciiSrcObject src, String name)
+{
+    Piece *piece;
+    int fd;
+
+    if (src->ascii_src.data_compression) {
+	Piece *tmp;
+
+	piece = src->ascii_src.first_piece;
+	while (piece) {
+	    int bytes = src->ascii_src.piece_size - piece->used;
+
+	    if (bytes > 0 && (tmp = piece->next) != NULL) {
+		bytes = XawMin(bytes, tmp->used);
+		memcpy(piece->text + piece->used, tmp->text, bytes);
+		memmove(tmp->text, tmp->text + bytes, tmp->used - bytes);
+		piece->used += bytes;
+		if ((tmp->used -= bytes) == 0) {
+		    RemovePiece(src, tmp);
+		    continue;
+		}
+	    }
+	    piece = piece->next;
+	}
+    }
+
+    if ((fd = creat(name, 0666)) == -1)
+	return (False);
+
+    for (piece = src->ascii_src.first_piece; piece; piece = piece->next)
+	if (write(fd, piece->text, piece->used) == -1)
+	    return (False);
+
+    if (close(fd) == -1)
+	return (False);
+
+    return (True);
+}
+
+/*
+ * Function:
+ *	StorePiecesInString
+ *
+ * Parameters:
+ *	data - ascii pointer data
+ *
+ * Description:
+ *	Store the pieces in memory into a standard ascii string.
+ */
+static String
+StorePiecesInString(AsciiSrcObject src)
+{
+    String string;
+    XawTextPosition first;
+    Piece *piece;
+
+    string = XtMalloc((unsigned)(src->ascii_src.length + 1));
+
+    for (first = 0, piece = src->ascii_src.first_piece ; piece != NULL; 
+	 first += piece->used, piece = piece->next) 
+      memcpy(string + first, piece->text, (unsigned)piece->used);
+
+    string[src->ascii_src.length] = '\0';
+
+    /*
+     * This will refill all pieces to capacity
+     */
+    if (src->ascii_src.data_compression) {
+	FreeAllPieces(src);
+	LoadPieces(src, NULL, string);
+    }
+
+    return (string);
+}
+
+/*
+ * Function:
+ *	InitStringOrFile
+ *
+ * Parameters:
+ *	src - AsciiSource
+ *
+ * Description:
+ *	Initializes the string or file.
+ */
+static FILE *
+InitStringOrFile(AsciiSrcObject src, Bool newString)
+{
+    mode_t open_mode = 0;
+    const char *fdopen_mode = NULL;
+    int fd;
+    FILE *file;
+
+    if (src->ascii_src.type == XawAsciiString) {
+	if (src->ascii_src.string == NULL)
+	    src->ascii_src.length = 0;
+
+	else if (!src->ascii_src.use_string_in_place) {
+	    src->ascii_src.string = XtNewString(src->ascii_src.string);
+	    src->ascii_src.allocated_string = True;
+	    src->ascii_src.length = strlen(src->ascii_src.string);
+	}
+
+	if (src->ascii_src.use_string_in_place) {
+	    if (src->ascii_src.string != NULL)
+	    src->ascii_src.length = strlen(src->ascii_src.string);
+	    /* In case the length resource is incorrectly set */
+	    if (src->ascii_src.length > src->ascii_src.ascii_length)
+		src->ascii_src.ascii_length = src->ascii_src.length;
+
+	    if (src->ascii_src.ascii_length == MAGIC_VALUE)
+		src->ascii_src.piece_size = src->ascii_src.length;
+	    else
+		src->ascii_src.piece_size = src->ascii_src.ascii_length + 1;
+	}
+
+	return (NULL);
+    }
+
+    /*
+     * type is XawAsciiFile
+     */
+    src->ascii_src.is_tempfile = False;
+
+    switch (src->text_src.edit_mode) {
+	case XawtextRead:
+	    if (src->ascii_src.string == NULL)
+		XtErrorMsg("NoFile", "asciiSourceCreate", "XawError",
+			   "Creating a read only disk widget and no file specified.",
+			   NULL, NULL);
+	    open_mode = O_RDONLY;
+	    fdopen_mode = "r";
+	    break;
+	case XawtextAppend:
+	case XawtextEdit:
+	    if (src->ascii_src.string == NULL) {
+		src->ascii_src.string = "*ascii-src*";
+		src->ascii_src.is_tempfile = True;
+	    }
+	    else {
+/* O_NOFOLLOW is a FreeBSD & Linux extension */
+#ifdef O_NOFOLLOW
+		open_mode = O_RDWR | O_NOFOLLOW;
+#else
+		open_mode = O_RDWR; /* unsafe; subject to race conditions */
+#endif /* O_NOFOLLOW */
+		fdopen_mode = "r+";
+	    }
+	    break;
+	default:
+	    XtErrorMsg("badMode", "asciiSourceCreate", "XawError",
+		       "Bad editMode for ascii source; must be Read, "
+		       "Append or Edit.",
+		       NULL, NULL);
+    }
+
+    /* If is_tempfile, allocate a private copy of the text
+     * Unlikely to be changed, just to set allocated_string */
+    if (newString || src->ascii_src.is_tempfile) {
+	src->ascii_src.string = XtNewString(src->ascii_src.string);
+	src->ascii_src.allocated_string = True;
+    }
+
+    if (!src->ascii_src.is_tempfile) {
+	if ((fd = open(src->ascii_src.string, open_mode, 0666)) != -1) {
+	    if ((file = fdopen(fd, fdopen_mode))) {
+		(void)fseek(file, 0, SEEK_END);
+		src->ascii_src.length = (XawTextPosition)ftell(file);
+		return (file);
+	    }
+	}
+	{
+	    String params[2];
+	    Cardinal num_params = 2;
+
+	    params[0] = src->ascii_src.string;
+	    params[1] = strerror(errno);
+	    XtAppWarningMsg(XtWidgetToApplicationContext((Widget)src),
+			    "openError", "asciiSourceCreate", "XawWarning",
+			    "Cannot open file %s; %s", params, &num_params);
+	}
+    }
+    src->ascii_src.length = 0;
+    return (NULL);
+}
+
+static void
+LoadPieces(AsciiSrcObject src, FILE *file, char *string)
+{
+    char *ptr;
+    Piece *piece = NULL;
+    XawTextPosition left;
+
+    if (string == NULL) {
+	if (src->ascii_src.type == XawAsciiFile) {
+	    if (src->ascii_src.length != 0) {
+		int len;
+
+		left = 0;
+		fseek(file, 0, 0);
+		while (left < src->ascii_src.length) {
+		    ptr = XtMalloc((unsigned)src->ascii_src.piece_size);
+		    if ((len = fread(ptr, (Size_t)sizeof(unsigned char),
+				     (Size_t)src->ascii_src.piece_size, file)) < 0)
+			XtErrorMsg("readError", "asciiSourceCreate", "XawError",
+				   "fread returned error.", NULL, NULL);
+		    piece = AllocNewPiece(src, piece);
+		    piece->text = ptr;
+		    piece->used = XawMin(len, src->ascii_src.piece_size);
+		    left += piece->used;
+		}
+	    }
+	    else {
+		piece = AllocNewPiece(src, NULL);
+		piece->text = XtMalloc((unsigned)src->ascii_src.piece_size);
+		piece->used = 0;
+	    }
+	    return;
+	}
+	else
+	    string = src->ascii_src.string;
+    }
+
+    if (src->ascii_src.use_string_in_place) {
+	piece = AllocNewPiece(src, piece);
+	piece->used = XawMin(src->ascii_src.length, src->ascii_src.piece_size);
+	piece->text = src->ascii_src.string;
+	return;
+    }
+
+    ptr = string;
+    left = src->ascii_src.length;
+    do {
+	piece = AllocNewPiece(src, piece);
+
+	piece->text = XtMalloc((unsigned)src->ascii_src.piece_size);
+	piece->used = XawMin(left, src->ascii_src.piece_size);
+	if (piece->used != 0)
+	    memcpy(piece->text, ptr, (unsigned)piece->used);
+
+	left -= piece->used;
+	ptr += piece->used;
+    } while (left > 0);
+}
+
+/*
+ * Function:
+ *	AllocNewPiece
+ *
+ * Parameters:
+ *	src - AsciiSrc Widget
+ *	prev - piece just before this one, or NULL
+ *
+ * Description:
+ *	Allocates a new piece of memory.
+ *
+ * Returns:
+ *	The allocated piece
+ */
+static Piece *
+AllocNewPiece(AsciiSrcObject src, Piece *prev)
+{
+    Piece *piece = XtNew(Piece);
+
+    if (prev == NULL) {
+	src->ascii_src.first_piece = piece;
+	piece->next = NULL;
+    }
+    else  {
+	if (prev->next != NULL)
+	    (prev->next)->prev = piece;
+	piece->next = prev->next;
+	prev->next = piece;
+    }
+
+    piece->prev = prev;
+
+    return (piece);
+}
+
+/*
+ * Function:
+ *	FreeAllPieces
+ *
+ * Parameters:
+ *	src - AsciiSrc Widget
+ *
+ * Description:
+ *	Frees all the pieces.
+ */
+static void
+FreeAllPieces(AsciiSrcObject src)
+{
+    Piece *next, * first = src->ascii_src.first_piece;
+
+#ifdef DEBUG
+    if (first->prev != NULL)
+	printf("Xaw AsciiSrc Object: possible memory leak in FreeAllPieces().\n");
+#endif
+
+    for (; first != NULL ; first = next) {
+	next = first->next;
+	RemovePiece(src, first);
+    }
+}
+
+/*
+ * Function:
+ *	RemovePiece
+ *
+ * Parameters:
+ *	piece - piece to remove
+ *
+ * Description:
+ *	Removes a piece from the list.
+ */
+static void
+RemovePiece(AsciiSrcObject src, Piece *piece)
+{
+    if (piece->prev == NULL)
+	src->ascii_src.first_piece = piece->next;
+    else
+	piece->prev->next = piece->next;
+
+    if (piece->next != NULL)
+	piece->next->prev = piece->prev;
+
+    if (!src->ascii_src.use_string_in_place)
+	XtFree(piece->text);
+
+    XtFree((char *)piece);
+}
+
+/*
+ * Function:
+ *	FindPiece
+ *
+ * Parameters:
+ *	src	 - AsciiSrc Widget
+ *	position - position that we are searching for
+ * 	first	 - position of the first character in this piece (return)
+ *
+ * Description:
+ *	Finds the piece containing the position indicated.
+ *
+ * Returns:
+ *	the piece that contains this position
+ */
+static Piece *
+FindPiece(AsciiSrcObject src, XawTextPosition position, XawTextPosition *first)
+{
+    Piece *old_piece, *piece;
+    XawTextPosition temp;
+
+    for (old_piece = NULL, piece = src->ascii_src.first_piece, temp = 0;
+	piece; old_piece = piece, piece = piece->next)
+	if ((temp += piece->used) > position) {
+	    *first = temp - piece->used;
+	    return (piece);
+	}
+
+    *first = temp - (old_piece ? old_piece->used : 0);
+
+    return (old_piece);	/* if we run off the end the return the last piece */
+}
+    
+/*
+ * Function:
+ *	BreakPiece
+ *
+ * Parameters:
+ *	src - AsciiSrc Widget
+ *	piece - piece to break
+ *
+ * Description:
+ *	Breaks a full piece into two new pieces.
+ */
+#define HALF_PIECE (src->ascii_src.piece_size >> 1)
+static void
+BreakPiece(AsciiSrcObject src, Piece *piece)
+{
+    Piece *cnew = AllocNewPiece(src, piece);
+
+    cnew->text = XtMalloc((unsigned)src->ascii_src.piece_size);
+    memcpy(cnew->text, piece->text + HALF_PIECE,
+	   (unsigned)(src->ascii_src.piece_size - HALF_PIECE));
+    piece->used = HALF_PIECE;
+    cnew->used = src->ascii_src.piece_size - HALF_PIECE;
+}
+
+/*ARGSUSED*/
+static void
+CvtStringToAsciiType(XrmValuePtr args, Cardinal *num_args,
+		     XrmValuePtr fromVal, XrmValuePtr toVal)
+{
+    static XawAsciiType type;
+    XrmQuark q;
+    char name[7];
+
+    XmuNCopyISOLatin1Lowered(name, (char *)fromVal->addr, sizeof(name));
+    q = XrmStringToQuark(name);
+
+    if (q == Qstring)
+	type = XawAsciiString;
+    else if (q == Qfile)
+	type = XawAsciiFile;
+    else  {
+	toVal->size = 0;
+	toVal->addr = NULL;
+	XtStringConversionWarning((char *)fromVal->addr, XtRAsciiType);
+    }
+
+    toVal->size = sizeof(XawAsciiType);
+    toVal->addr = (XPointer)&type;
+}
+
+/*ARGSUSED*/
+static Boolean
+CvtAsciiTypeToString(Display *dpy, XrmValuePtr args, Cardinal *num_args,
+		     XrmValuePtr fromVal, XrmValuePtr toVal,
+		     XtPointer *data)
+{
+    static String buffer;
+    Cardinal size;
+
+    switch (*(XawAsciiType *)fromVal->addr) {
+	case XawAsciiFile:
+	    buffer = XtEfile;
+	    break;
+	case XawAsciiString:
+	    buffer = XtEstring;
+	    break;
+	default:
+	    XawTypeToStringWarning(dpy, XtRAsciiType);
+	    toVal->addr = NULL;
+	    toVal->size = 0;
+	    return (False);
+    }
+
+    size = strlen(buffer) + 1;
+    if (toVal->addr != NULL) {
+	if (toVal->size < size) {
+	    toVal->size = size;
+	    return (False);
+	}
+	strcpy((char *)toVal->addr, buffer);
+    }
+    else
+	toVal->addr = (XPointer)buffer;
+    toVal->size = sizeof(String);
+
+    return (True);
+}
+
+/*ARGSUSED*/
+static void
+GetDefaultPieceSize(Widget w, int offset, XrmValue *value)
+{
+    static XPointer pagesize;
+
+    if (pagesize == NULL) {
+	pagesize = (XPointer)((long)_XawGetPageSize());
+	if (pagesize < (XPointer)BUFSIZ)
+	    pagesize = (XPointer)BUFSIZ;
+    }
+
+    value->addr = (XPointer)&pagesize;
+}
+
+#if (defined(ASCII_STRING) || defined(ASCII_DISK))
+#  include <X11/Xaw/Cardinals.h>
+#endif
+
+#ifdef ASCII_STRING
+/*
+ * Compatability functions.
+ */
+/*
+ * Function:
+ *	AsciiStringSourceCreate
+ *
+ * Parameters:
+ *	parent	 - widget that will own this source
+ *	args	 - the argument list
+ *	num_args - ""
+ *
+ * Description:
+ *	Creates a string source.
+ *
+ * Returns:
+ *	A pointer to the new text source.
+ */
+Widget
+XawStringSourceCreate(Widget parent, ArgList args, Cardinal num_args)
+{
+    XawTextSource src;
+    ArgList ascii_args;
+    Arg temp[2];
+
+    XtSetArg(temp[0], XtNtype, XawAsciiString);
+    XtSetArg(temp[1], XtNuseStringInPlace, True);
+    ascii_args = XtMergeArgLists(temp, TWO, args, num_args);
+
+    src = XtCreateWidget("genericAsciiString", asciiSrcObjectClass, parent,
+			 ascii_args, num_args + TWO);
+    XtFree((char *)ascii_args);
+
+    return (src);
+}
+
+/*
+ * This is hacked up to try to emulate old functionality, it
+ * may not work, as I have not old code to test it on.
+ *
+ * Chris D. Peterson  8/31/89.
+ */
+void
+XawTextSetLastPos(Widget w, XawTextPosition lastPos)
+{
+    AsciiSrcObject src = (AsciiSrcObject)XawTextGetSource(w);
+
+    src->ascii_src.piece_size = lastPos;
+}
+#endif /* ASCII_STRING */
+
+#ifdef ASCII_DISK
+/*
+ * Function:
+ *	AsciiDiskSourceCreate
+ *
+ * Parameters:
+ *	parent	 - widget that will own this source
+ *	args	 - argument list
+ *	num_args - ""
+ *
+ * Description:
+ *	Creates a disk source.
+ *
+ * Returns:
+ *	A pointer to the new text source
+ */
+Widget
+XawDiskSourceCreate(Widget parent, ArgList args, Cardinal num_args)
+{
+    XawTextSource src;
+    ArgList ascii_args;
+    Arg temp[1];
+    int i;
+
+    XtSetArg(temp[0], XtNtype, XawAsciiFile);
+    ascii_args = XtMergeArgLists(temp, ONE, args, num_args);
+    num_args++;
+
+    for (i = 0; i < num_args; i++) 
+	if (streq(ascii_args[i].name, XtNfile)
+	    || streq(ascii_args[i].name, XtCFile)) 
+	    ascii_args[i].name = XtNstring;
+
+    src = XtCreateWidget("genericAsciiDisk", asciiSrcObjectClass, parent,
+			 ascii_args, num_args);
+    XtFree((char *)ascii_args);
+
+    return (src);
+}
+#endif /* ASCII_DISK */