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/*
* file viewer (hex dump)
* quick & dirty for now, handling xxl files doesn't work very well ...
*
* (c) 2001 Gerd Hoffmann <kraxel@bytesex.org>
*
*/
#include <stdio.h>
#include <ctype.h>
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include <Xm/Xm.h>
#include <Xm/Form.h>
#include <Xm/Label.h>
#include <Xm/RowColumn.h>
#include <Xm/PushB.h>
#include <Xm/ScrolledW.h>
#include <Xm/SelectioB.h>
#include "RegEdit.h"
#include "hex.h"
extern Display *dpy;
extern Widget app_shell;
/*----------------------------------------------------------------------*/
static Widget hex_dlg, hex_label;
static void
hex_destroy(Widget widget, XtPointer clientdata, XtPointer call_data)
{
XtDestroyWidget(hex_dlg);
hex_dlg = NULL;
}
static XmString
hexify(int addr,unsigned char *data, int bytes)
{
XmString xmpage,xmchunk;
char line[120];
int len,y,i;
xmpage = XmStringGenerate("", NULL, XmMULTIBYTE_TEXT, NULL);
for (y = 0; y < bytes; y += 16) {
/* hexify line */
len = sprintf(line,"%04x ",addr+y);
for (i = 0; i < 16; i++) {
if (y+i < bytes)
len += sprintf(line+len,"%02x ",data[y+i]);
else
len += sprintf(line+len," ");
if (3 == i%4)
len += sprintf(line+len," ");
}
for (i = 0; i < 16; i++) {
if (y+i < bytes)
if (isprint(data[y+i]))
len += sprintf(line+len,"%c",data[y+i]);
else
len += sprintf(line+len,".");
else
len += sprintf(line+len," ");
}
len += sprintf(line+len,"\n");
/* add last chunk for line */
xmchunk = XmStringGenerate(line, NULL, XmMULTIBYTE_TEXT, NULL);
xmpage = XmStringConcatAndFree(xmpage, xmchunk);
}
return xmpage;
}
/* guess whenever we have ascii or binary data */
static int
is_binary(unsigned char *data, int bytes)
{
int i, bin;
bin = 0;
for (i = 0; i < 64 && i < bytes; i++) {
if (!isprint(data[i]) &&
data[i] != '\t' &&
data[i] != '\n')
bin = 1;
}
return bin;
}
void
hex_display(char *filename)
{
Widget view;
XmString xmpage,chunk;
unsigned char data[32768+1];
int chars;
FILE *fp;
/* build dialog */
if (!hex_dlg) {
hex_dlg = XmCreatePromptDialog(app_shell,"hex",NULL,0);
XmdRegisterEditres(XtParent(hex_dlg));
XtUnmanageChild(XmSelectionBoxGetChild(hex_dlg,
XmDIALOG_SELECTION_LABEL));
XtUnmanageChild(XmSelectionBoxGetChild(hex_dlg,XmDIALOG_HELP_BUTTON));
XtUnmanageChild(XmSelectionBoxGetChild(hex_dlg,
XmDIALOG_CANCEL_BUTTON));
XtUnmanageChild(XmSelectionBoxGetChild(hex_dlg,XmDIALOG_TEXT));
XtAddCallback(hex_dlg,XmNokCallback,hex_destroy,NULL);
view = XmCreateScrolledWindow(hex_dlg,"view",NULL,0);
XtManageChild(view);
hex_label = XtVaCreateManagedWidget("label", xmLabelWidgetClass,
view, NULL);
}
XtManageChild(hex_dlg);
/* read the file (32k max) */
fp = fopen(filename,"r");
memset(data,0,sizeof(data));
chars = fread(data, 1, sizeof(data)-1, fp);
if (is_binary(data,chars)) {
xmpage = hexify(0, data, chars);
if (sizeof(data)-1 == chars) {
chunk = XmStringGenerate("[ ... ]\n",NULL,
XmMULTIBYTE_TEXT, NULL);
xmpage = XmStringConcatAndFree(xmpage,chunk);
}
} else {
xmpage = XmStringGenerate(data, NULL, XmMULTIBYTE_TEXT, NULL);
if (sizeof(data)-1 == chars) {
chunk = XmStringGenerate("\n[ ... ]\n",NULL,
XmMULTIBYTE_TEXT, NULL);
xmpage = XmStringConcatAndFree(xmpage,chunk);
}
}
XtVaSetValues(hex_label,XmNlabelString,xmpage,NULL);
XmStringFree(xmpage);
XtVaSetValues(XtParent(hex_dlg),XmNtitle,filename,NULL);
fclose(fp);
}
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