[unix-history] / usr / src / usr.bin / hexdump / display.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)display.c	5.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <strings.h>
#include "hexdump.h"

static off_t address;			/* address/offset in stream */
static off_t eaddress;			/* end address */
static off_t savaddress;		/* saved address/offset in stream */

display()
{
	extern FU *endfu;
	register FS *fs;
	register FU *fu;
	register PR *pr;
	register int cnt;
	register u_char *bp;
	off_t saveaddress;
	u_char savech, *savebp, *get();

	while (bp = get())
	    for (fs = fshead, savebp = bp, saveaddress = address; fs;
		fs = fs->nextfs, bp = savebp, address = saveaddress) {
		    for (fu = fs->nextfu; fu; fu = fu->nextfu) {
			if (fu->flags&F_IGNORE)
				break;
			for (cnt = fu->reps; cnt; --cnt)
			    for (pr = fu->nextpr; pr; address += pr->bcnt,
				bp += pr->bcnt, pr = pr->nextpr) {
				    if (eaddress && address >= eaddress) {
					    bpad(fu, pr, bp);
					    goto nextfs;
				    }
				    if (cnt == 1 && pr->nospace) {
					savech = *pr->nospace;
					*pr->nospace = '\0';
				    }
				    print(pr, bp);
				    if (cnt == 1 && pr->nospace)
					*pr->nospace = savech;
			    }
		    }
nextfs:		;
		}
	if (endfu) {
		/*
		 * if eaddress not set, file size was multiple of blocksize,
		 * and no partial block ever found.
		 */
		if (!eaddress)
			eaddress = address + blocksize; 
		for (pr = endfu->nextpr; pr; pr = pr->nextpr)
			switch(pr->flags) {
			case F_ADDRESS:
				(void)printf(pr->fmt, eaddress);
				break;
			case F_TEXT:
				(void)printf(pr->fmt);
				break;
			}
	}
}

print(pr, bp)
	PR *pr;
	u_char *bp;
{
	switch(pr->flags) {
	case F_ADDRESS:
		(void)printf(pr->fmt, address);
		break;
	case F_C:
		conv_c(pr, bp);
		break;
	case F_CHAR:
		(void)printf(pr->fmt, *bp);
		break;
	case F_DBL: {
		double dval;
		float fval;

		switch(pr->bcnt) {
		case 4:
			bcopy((char *)bp, (char *)&fval, sizeof(fval));
			(void)printf(pr->fmt, fval);
			break;
		case 8:
			bcopy((char *)bp, (char *)&dval, sizeof(dval));
			(void)printf(pr->fmt, dval);
			break;
		}
		break;
	}
	case F_INT: {
		int ival;
		short sval;

		switch(pr->bcnt) {
		case 1:
			(void)printf(pr->fmt, (int)*bp);
			break;
		case 2:
			bcopy((char *)bp, (char *)&sval, sizeof(sval));
			(void)printf(pr->fmt, (int)sval);
			break;
		case 4:
			bcopy((char *)bp, (char *)&ival, sizeof(ival));
			(void)printf(pr->fmt, ival);
			break;
		}
		break;
	}
	case F_P:
		(void)printf(pr->fmt, isprint(*bp) ? *bp : '.');
		break;
	case F_STR:
		(void)printf(pr->fmt, (char *)bp);
		break;
	case F_TEXT:
		(void)printf(pr->fmt);
		break;
	case F_U:
		conv_u(pr, bp);
		break;
	case F_UINT: {
		u_int ival;
		u_short sval;

		switch(pr->bcnt) {
		case 1:
			(void)printf(pr->fmt, (u_int)*bp);
			break;
		case 2:
			bcopy((char *)bp, (char *)&sval, sizeof(sval));
			(void)printf(pr->fmt, (u_int)sval);
			break;
		case 4:
			bcopy((char *)bp, (char *)&ival, sizeof(ival));
			(void)printf(pr->fmt, ival);
			break;
		}
		break;
	}
	}
}

u_char *
get()
{
	extern enum _vflag vflag;
	extern int length;
	static int ateof = 1;
	static u_char *curp, *savp;
	register int n;
	int need, nread;
	u_char *tmpp;

	if (!curp) {
		curp = (u_char *)emalloc(blocksize);
		savp = (u_char *)emalloc(blocksize);
	} else {
		tmpp = curp;
		curp = savp;
		savp = tmpp;
		address = savaddress += blocksize;
	}
	for (need = blocksize, nread = 0;;) {
		/*
		 * if read the right number of bytes, or at EOF for one file,
		 * and no other files are available, zero-pad the rest of the
		 * block and set the end flag.
		 */
		if (!length || ateof && !next((char **)NULL)) {
			if (need == blocksize)
				return((u_char *)NULL);
			if (vflag != ALL && !bcmp(curp, savp, nread)) {
				if (vflag != DUP)
					(void)printf("*\n");
				return((u_char *)NULL);
			}
			bzero((char *)curp + nread, need);
			eaddress = address + nread;
			return(curp);
		}
		n = fread((char *)curp + nread, sizeof(u_char),
		    length == -1 ? need : MIN(length, need), stdin);
		if (!n) {
			ateof = 1;
			continue;
		}
		ateof = 0;
		if (length != -1)
			length -= n;
		if (!(need -= n)) {
			if (vflag == ALL || bcmp(curp, savp, blocksize)) {
				if (vflag == DUP)
					vflag = WAIT;
				return(curp);
			}
			if (vflag == WAIT)
				(void)printf("*\n");
			vflag = DUP;
			address = savaddress += blocksize;
			need = blocksize;
			nread = 0;
		}
		else
			nread += n;
	}
}

extern off_t skip;			/* bytes to skip */

next(argv)
	char **argv;
{
	extern int errno, exitval;
	static int done;
	static char **_argv;
	int statok;

	if (argv) {
		_argv = argv;
		return(1);
	}
	for (;;) {
		if (*_argv) {
			if (!(freopen(*_argv, "r", stdin))) {
				(void)fprintf(stderr, "hexdump: %s: %s\n",
				    *_argv, strerror(errno));
				exitval = 1;
				++_argv;
				continue;
			}
			statok = done = 1;
		} else {
			if (done++)
				return(0);
			statok = 0;
		}
		if (skip)
			doskip(statok ? *_argv : "stdin", statok);
		if (*_argv)
			++_argv;
		if (!skip)
			return(1);
	}
	/* NOTREACHED */
}

doskip(fname, statok)
	char *fname;
	int statok;
{
	extern int errno;
	struct stat sbuf;

	if (statok) {
		if (fstat(fileno(stdin), &sbuf)) {
			(void)fprintf(stderr, "hexdump: %s: %s.\n",
			    fname, strerror(errno));
			exit(1);
		}
		if (skip >= sbuf.st_size) {
			skip -= sbuf.st_size;
			address += sbuf.st_size;
			return;
		}
	}
	if (fseek(stdin, skip, SEEK_SET)) {
		(void)fprintf(stderr, "hexdump: %s: %s.\n",
		    fname, strerror(errno));
		exit(1);
	}
	savaddress = address += skip;
	skip = 0;
}

char *
emalloc(size)
	int size;
{
	char *p, *malloc();

	if (!(p = malloc((u_int)size)))
		nomem();
	bzero(p, size);
	return(p);
}

nomem()
{
	(void)fprintf(stderr, "hexdump: out of memory.\n");
	exit(1);
}
Commit	Line	Data
5880e327 KB	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*/
	17
	18	#ifndef lint
	19	static char sccsid[] = "@(#)display.c 5.1 (Berkeley) %G%";
	20	#endif /* not lint */
	21
	22	#include <sys/param.h>
	23	#include <sys/stat.h>
	24	#include <unistd.h>
	25	#include <ctype.h>
	26	#include <stdio.h>
	27	#include <strings.h>
	28	#include "hexdump.h"
	29
	30	static off_t address; /* address/offset in stream */
	31	static off_t eaddress; /* end address */
	32	static off_t savaddress; /* saved address/offset in stream */
	33
	34	display()
	35	{
	36	extern FU *endfu;
	37	register FS *fs;
	38	register FU *fu;
	39	register PR *pr;
	40	register int cnt;
	41	register u_char *bp;
	42	off_t saveaddress;
	43	u_char savech, savebp, get();
	44
	45	while (bp = get())
	46	for (fs = fshead, savebp = bp, saveaddress = address; fs;
	47	fs = fs->nextfs, bp = savebp, address = saveaddress) {
	48	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
	49	if (fu->flags&F_IGNORE)
	50	break;
	51	for (cnt = fu->reps; cnt; --cnt)
	52	for (pr = fu->nextpr; pr; address += pr->bcnt,
	53	bp += pr->bcnt, pr = pr->nextpr) {
	54	if (eaddress && address >= eaddress) {
	55	bpad(fu, pr, bp);
	56	goto nextfs;
	57	}
	58	if (cnt == 1 && pr->nospace) {
	59	savech = *pr->nospace;
	60	*pr->nospace = '\0';
	61	}
	62	print(pr, bp);
	63	if (cnt == 1 && pr->nospace)
	64	*pr->nospace = savech;
65	}
66	}
67	nextfs: ;
68	}
69	if (endfu) {
70	/*
71	* if eaddress not set, file size was multiple of blocksize,
72	* and no partial block ever found.
73	*/
74	if (!eaddress)
75	eaddress = address + blocksize;
76	for (pr = endfu->nextpr; pr; pr = pr->nextpr)
77	switch(pr->flags) {
78	case F_ADDRESS:
79	(void)printf(pr->fmt, eaddress);
80	break;
81	case F_TEXT:
82	(void)printf(pr->fmt);
83	break;
84	}
85	}
86	}
87
88	print(pr, bp)
89	PR *pr;
90	u_char *bp;
91	{
92	switch(pr->flags) {
93	case F_ADDRESS:
94	(void)printf(pr->fmt, address);
95	break;
96	case F_C:
97	conv_c(pr, bp);
98	break;
99	case F_CHAR:
100	(void)printf(pr->fmt, *bp);
101	break;
102	case F_DBL: {
103	double dval;
104	float fval;
105
106	switch(pr->bcnt) {
107	case 4:
108	bcopy((char )bp, (char )&fval, sizeof(fval));
109	(void)printf(pr->fmt, fval);
110	break;
111	case 8:
112	bcopy((char )bp, (char )&dval, sizeof(dval));
113	(void)printf(pr->fmt, dval);
114	break;
115	}
116	break;
117	}
118	case F_INT: {
119	int ival;
120	short sval;
121
122	switch(pr->bcnt) {
123	case 1:
124	(void)printf(pr->fmt, (int)*bp);
125	break;
126	case 2:
127	bcopy((char )bp, (char )&sval, sizeof(sval));
128	(void)printf(pr->fmt, (int)sval);
129	break;
130	case 4:
131	bcopy((char )bp, (char )&ival, sizeof(ival));
132	(void)printf(pr->fmt, ival);
133	break;
134	}
135	break;
136	}
137	case F_P:
138	(void)printf(pr->fmt, isprint(bp) ? bp : '.');
139	break;
140	case F_STR:
141	(void)printf(pr->fmt, (char *)bp);
142	break;
143	case F_TEXT:
144	(void)printf(pr->fmt);
145	break;
146	case F_U:
147	conv_u(pr, bp);
148	break;
149	case F_UINT: {
150	u_int ival;
151	u_short sval;
152
153	switch(pr->bcnt) {
154	case 1:
155	(void)printf(pr->fmt, (u_int)*bp);
156	break;
157	case 2:
158	bcopy((char )bp, (char )&sval, sizeof(sval));
159	(void)printf(pr->fmt, (u_int)sval);
160	break;
161	case 4:
162	bcopy((char )bp, (char )&ival, sizeof(ival));
163	(void)printf(pr->fmt, ival);
164	break;
165	}
166	break;
167	}
168	}
169	}
170
171	u_char *
172	get()
173	{
174	extern enum _vflag vflag;
175	extern int length;
176	static int ateof = 1;
177	static u_char curp, savp;
178	register int n;
179	int need, nread;
180	u_char *tmpp;
181
182	if (!curp) {
183	curp = (u_char *)emalloc(blocksize);
184	savp = (u_char *)emalloc(blocksize);
185	} else {
186	tmpp = curp;
187	curp = savp;
188	savp = tmpp;
189	address = savaddress += blocksize;
190	}
191	for (need = blocksize, nread = 0;;) {
192	/*
193	* if read the right number of bytes, or at EOF for one file,
194	* and no other files are available, zero-pad the rest of the
195	* block and set the end flag.
196	*/
197	if (!length \|\| ateof && !next((char **)NULL)) {
198	if (need == blocksize)
199	return((u_char *)NULL);
200	if (vflag != ALL && !bcmp(curp, savp, nread)) {
201	if (vflag != DUP)
202	(void)printf("*\n");
203	return((u_char *)NULL);
204	}
205	bzero((char *)curp + nread, need);
206	eaddress = address + nread;
207	return(curp);
208	}
209	n = fread((char *)curp + nread, sizeof(u_char),
210	length == -1 ? need : MIN(length, need), stdin);
211	if (!n) {
212	ateof = 1;
213	continue;
214	}
215	ateof = 0;
216	if (length != -1)
217	length -= n;
218	if (!(need -= n)) {
219	if (vflag == ALL \|\| bcmp(curp, savp, blocksize)) {
220	if (vflag == DUP)
221	vflag = WAIT;
222	return(curp);
223	}
224	if (vflag == WAIT)
225	(void)printf("*\n");
226	vflag = DUP;
227	address = savaddress += blocksize;
228	need = blocksize;
229	nread = 0;
230	}
231	else
232	nread += n;
233	}
234	}
235
236	extern off_t skip; /* bytes to skip */
237
238	next(argv)
239	char **argv;
240	{
241	extern int errno, exitval;
242	static int done;
243	static char **_argv;
244	int statok;
245
246	if (argv) {
247	_argv = argv;
248	return(1);
249	}
250	for (;;) {
251	if (*_argv) {
252	if (!(freopen(*_argv, "r", stdin))) {
253	(void)fprintf(stderr, "hexdump: %s: %s\n",
254	*_argv, strerror(errno));
255	exitval = 1;
256	++_argv;
257	continue;
258	}
259	statok = done = 1;
260	} else {
261	if (done++)
262	return(0);
263	statok = 0;
264	}
265	if (skip)
266	doskip(statok ? *_argv : "stdin", statok);
267	if (*_argv)
268	++_argv;
269	if (!skip)
270	return(1);
271	}
272	/* NOTREACHED */
273	}
274
275	doskip(fname, statok)
276	char *fname;
277	int statok;
278	{
279	extern int errno;
280	struct stat sbuf;
281
282	if (statok) {
283	if (fstat(fileno(stdin), &sbuf)) {
284	(void)fprintf(stderr, "hexdump: %s: %s.\n",
285	fname, strerror(errno));
286	exit(1);
287	}
288	if (skip >= sbuf.st_size) {
289	skip -= sbuf.st_size;
290	address += sbuf.st_size;
291	return;
292	}
293	}
294	if (fseek(stdin, skip, SEEK_SET)) {
295	(void)fprintf(stderr, "hexdump: %s: %s.\n",
296	fname, strerror(errno));
297	exit(1);
298	}
299	savaddress = address += skip;
300	skip = 0;
301	}
302
303	char *
304	emalloc(size)
305	int size;
306	{
307	char p, malloc();
308
309	if (!(p = malloc((u_int)size)))
310	nomem();
311	bzero(p, size);
312	return(p);
313	}
314
315	nomem()
316	{
317	(void)fprintf(stderr, "hexdump: out of memory.\n");
318	exit(1);
319	}