diff options
Diffstat (limited to 'hex.c')
| -rw-r--r-- | hex.c | 141 |
1 files changed, 141 insertions, 0 deletions
@@ -0,0 +1,141 @@ +/* + * file viewer (hex dump) + * quick & dirty for now, handling xxl files doesn't work very well ... + * + * (c) 2001 Gerd Knorr <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); +} |