hexdump.c
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上传日期:2013-06-12
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文件大小:2k
- /*
- * Copyright (C) 1998 Mark Baysinger (mbaysing@ucsd.edu)
- * Copyright (C) 1998,1999 Ross Combs (rocombs@cs.nmsu.edu)
- *
- * 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 "common/setup_before.h"
- #include <stdio.h>
- #ifdef HAVE_STDDEF_H
- # include <stddef.h>
- #else
- # ifndef NULL
- # define NULL ((void *)0)
- # endif
- #endif
- #include "common/hexdump.h"
- #include "common/setup_after.h"
- extern void hexdump(FILE * stream, void const * data, unsigned int len)
- {
- unsigned int i;
- unsigned int r,c;
-
- if (!stream)
- return;
- if (!data)
- return;
-
- for (r=0,i=0; r<(len/16+(len%16!=0)); r++,i+=16)
- {
- fprintf(stream,"%04X: ",i); /* location of first byte in line */
-
- for (c=i; c<i+8; c++) /* left half of hex dump */
- if (c<len)
- fprintf(stream,"%02X ",((unsigned char const *)data)[c]);
- else
- fprintf(stream," "); /* pad if short line */
-
- fprintf(stream," ");
-
- for (c=i+8; c<i+16; c++) /* right half of hex dump */
- if (c<len)
- fprintf(stream,"%02X ",((unsigned char const *)data)[c]);
- else
- fprintf(stream," "); /* pad if short line */
-
- fprintf(stream," ");
-
- for (c=i; c<i+16; c++) /* ASCII dump */
- if (c<len)
- if (((unsigned char const *)data)[c]>=32 &&
- ((unsigned char const *)data)[c]<127)
- fprintf(stream,"%c",((char const *)data)[c]);
- else
- fprintf(stream,"."); /* put this for non-printables */
- else
- fprintf(stream," "); /* pad if short line */
-
- fprintf(stream,"n");
- }
-
- fflush(stream);
- }