text-utils/parse.c - pub/scm/utils/util-linux/util-linux - Git at Google

 /*
  * Copyright (c) 1989 The Regents of the University of California.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *	This product includes software developed by the University of
  *	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #ifndef lint
 static char sccsid[] = "@(#)parse.c	5.6 (Berkeley) 3/9/91";
 #endif /* not lint */

 #include <sys/types.h>
 #include <sys/file.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
 #include <string.h>
 #include "hexdump.h"

 static void escape(register char *p1);
 static void badcnt(char *s);
 static void badsfmt(void);
 static void badfmt(char *fmt);
 static void badconv(char *ch);

 FU *endfu;					/* format at end-of-data */

 void addfile(char *name)
 {
 	register char *p;
 	FILE *fp;
 	int ch;
 	char buf[2048 + 1];

 	if (!(fp = fopen(name, "r"))) {
 		(void)fprintf(stderr, "hexdump: can't read %s.\n", name);
 		exit(1);
 	}
 	while (fgets(buf, sizeof(buf), fp)) {
 		if (!(p = index(buf, '\n'))) {
 			(void)fprintf(stderr, "hexdump: line too long.\n");
 			while ((ch = getchar()) != '\n' && ch != EOF);
 			continue;
 		}
 		*p = '\0';
 		for (p = buf; *p && isspace(*p); ++p);
 		if (!*p || *p == '#')
 			continue;
 		add(p);
 	}
 	(void)fclose(fp);
 }

 void add(char *fmt)
 {
 	register char *p;
 	static FS **nextfs;
 	FS *tfs;
 	FU *tfu, **nextfu;
 	char *savep, *emalloc();

 	/* start new linked list of format units */
 	/* NOSTRICT */
 	tfs = (FS *)emalloc(sizeof(FS));
 	if (!fshead)
 		fshead = tfs;
 	else
 		*nextfs = tfs;
 	nextfs = &tfs->nextfs;
 	nextfu = &tfs->nextfu;

 	/* take the format string and break it up into format units */
 	for (p = fmt;;) {
 		/* skip leading white space */
 		for (; isspace(*p); ++p);
 		if (!*p)
 			break;

 		/* allocate a new format unit and link it in */
 		/* NOSTRICT */
 		tfu = (FU *)emalloc(sizeof(FU));
 		*nextfu = tfu;
 		nextfu = &tfu->nextfu;
 		tfu->reps = 1;

 		/* if leading digit, repetition count */
 		if (isdigit(*p)) {
 			for (savep = p; isdigit(*p); ++p);
 			if (!isspace(*p) && *p != '/')
 				badfmt(fmt);
 			/* may overwrite either white space or slash */
 			tfu->reps = atoi(savep);
 			tfu->flags = F_SETREP;
 			/* skip trailing white space */
 			for (++p; isspace(*p); ++p);
 		}

 		/* skip slash and trailing white space */
 		if (*p == '/')
 			while (isspace(*++p));

 		/* byte count */
 		if (isdigit(*p)) {
 			for (savep = p; isdigit(*p); ++p);
 			if (!isspace(*p))
 				badfmt(fmt);
 			tfu->bcnt = atoi(savep);
 			/* skip trailing white space */
 			for (++p; isspace(*p); ++p);
 		}

 		/* format */
 		if (*p != '"')
 			badfmt(fmt);
 		for (savep = ++p; *p != '"';)
 			if (*p++ == 0)
 				badfmt(fmt);
 		if (!(tfu->fmt = malloc(p - savep + 1)))
 			nomem();
 		(void) strncpy(tfu->fmt, savep, p - savep);
 		tfu->fmt[p - savep] = '\0';
 		escape(tfu->fmt);
 		p++;
 	}
 }

 static char *spec = ".#-+ 0123456789";

 int size(FS *fs)
 {
 	register FU *fu;
 	register int bcnt, cursize;
 	register char *fmt;
 	int prec;

 	/* figure out the data block size needed for each format unit */
 	for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
 		if (fu->bcnt) {
 			cursize += fu->bcnt * fu->reps;
 			continue;
 		}
 		for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
 			if (*fmt != '%')
 				continue;
 			/*
 			 * skip any special chars -- save precision in
 			 * case it's a %s format.
 			 */
 			while (index(spec + 1, *++fmt));
 			if (*fmt == '.' && isdigit(*++fmt)) {
 				prec = atoi(fmt);
 				while (isdigit(*++fmt));
 			}
 			switch(*fmt) {
 			case 'c':
 				bcnt += 1;
 				break;
 			case 'd': case 'i': case 'o': case 'u':
 			case 'x': case 'X':
 				bcnt += 4;
 				break;
 			case 'e': case 'E': case 'f': case 'g': case 'G':
 				bcnt += 8;
 				break;
 			case 's':
 				bcnt += prec;
 				break;
 			case '_':
 				switch(*++fmt) {
 				case 'c': case 'p': case 'u':
 					bcnt += 1;
 					break;
 				}
 			}
 		}
 		cursize += bcnt * fu->reps;
 	}
 	return(cursize);
 }

 void rewrite(FS *fs)
 {
 	enum { NOTOKAY, USEBCNT, USEPREC } sokay;
 	register PR *pr, **nextpr = NULL;
 	register FU *fu;
 	register char *p1, *p2;
 	char savech, *fmtp;
 	int nconv, prec = 0;

 	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
 		/*
 		 * break each format unit into print units; each
 		 * conversion character gets its own.
 		 */
 		for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
 			/* NOSTRICT */
 			pr = (PR *)emalloc(sizeof(PR));
 			if (!fu->nextpr)
 				fu->nextpr = pr;
 			else
 				*nextpr = pr;

 			/* skip preceding text and up to the next % sign */
 			for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);

 			/* only text in the string */
 			if (!*p1) {
 				pr->fmt = fmtp;
 				pr->flags = F_TEXT;
 				break;
 			}

 			/*
 			 * get precision for %s -- if have a byte count, don't
 			 * need it.
 			 */
 			if (fu->bcnt) {
 				sokay = USEBCNT;
 				/* skip to conversion character */
 				for (++p1; index(spec, *p1); ++p1);
 			} else {
 				/* skip any special chars, field width */
 				while (index(spec + 1, *++p1));
 				if (*p1 == '.' && isdigit(*++p1)) {
 					sokay = USEPREC;
 					prec = atoi(p1);
 					while (isdigit(*++p1));
 				}
 				else
 					sokay = NOTOKAY;
 			}

 			p2 = p1 + 1;		/* set end pointer */

 			/*
 			 * figure out the byte count for each conversion;
 			 * rewrite the format as necessary, set up blank-
 			 * padding for end of data.
 			 */
 			switch(*p1) {
 			case 'c':
 				pr->flags = F_CHAR;
 				switch(fu->bcnt) {
 				case 0: case 1:
 					pr->bcnt = 1;
 					break;
 				default:
 					p1[1] = '\0';
 					badcnt(p1);
 				}
 				break;
 			case 'd': case 'i':
 				pr->flags = F_INT;
 				goto sw1;
 			case 'l':
 				++p2;
 				switch(p1[1]) {
 				case 'd': case 'i':
 					++p1;
 					pr->flags = F_INT;
 					goto sw1;
 				case 'o': case 'u': case 'x': case 'X':
 					++p1;
 					pr->flags = F_UINT;
 					goto sw1;
 				default:
 					p1[2] = '\0';
 					badconv(p1);
 				}
 				/* NOTREACHED */
 			case 'o': case 'u': case 'x': case 'X':
 				pr->flags = F_UINT;
 sw1:				switch(fu->bcnt) {
 				case 0: case 4:
 					pr->bcnt = 4;
 					break;
 				case 1:
 					pr->bcnt = 1;
 					break;
 				case 2:
 					pr->bcnt = 2;
 					break;
 				default:
 					p1[1] = '\0';
 					badcnt(p1);
 				}
 				break;
 			case 'e': case 'E': case 'f': case 'g': case 'G':
 				pr->flags = F_DBL;
 				switch(fu->bcnt) {
 				case 0: case 8:
 					pr->bcnt = 8;
 					break;
 				case 4:
 					pr->bcnt = 4;
 					break;
 				default:
 					p1[1] = '\0';
 					badcnt(p1);
 				}
 				break;
 			case 's':
 				pr->flags = F_STR;
 				switch(sokay) {
 				case NOTOKAY:
 					badsfmt();
 				case USEBCNT:
 					pr->bcnt = fu->bcnt;
 					break;
 				case USEPREC:
 					pr->bcnt = prec;
 					break;
 				}
 				break;
 			case '_':
 				++p2;
 				switch(p1[1]) {
 				case 'A':
 					endfu = fu;
 					fu->flags |= F_IGNORE;
 					/* FALLTHROUGH */
 				case 'a':
 					pr->flags = F_ADDRESS;
 					++p2;
 					switch(p1[2]) {
 					case 'd': case 'o': case'x':
 						*p1 = p1[2];
 						break;
 					default:
 						p1[3] = '\0';
 						badconv(p1);
 					}
 					break;
 				case 'c':
 					pr->flags = F_C;
 					/* *p1 = 'c';	set in conv_c */
 					goto sw2;
 				case 'p':
 					pr->flags = F_P;
 					*p1 = 'c';
 					goto sw2;
 				case 'u':
 					pr->flags = F_U;
 					/* *p1 = 'c';	set in conv_u */
 sw2:					switch(fu->bcnt) {
 					case 0: case 1:
 						pr->bcnt = 1;
 						break;
 					default:
 						p1[2] = '\0';
 						badcnt(p1);
 					}
 					break;
 				default:
 					p1[2] = '\0';
 					badconv(p1);
 				}
 				break;
 			default:
 				p1[1] = '\0';
 				badconv(p1);
 			}

 			/*
 			 * copy to PR format string, set conversion character
 			 * pointer, update original.
 			 */
 			savech = *p2;
 			p1[1] = '\0';
 			if (!(pr->fmt = strdup(fmtp)))
 				nomem();
 			*p2 = savech;
 			pr->cchar = pr->fmt + (p1 - fmtp);
 			fmtp = p2;

 			/* only one conversion character if byte count */
 			if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) {
 				(void)fprintf(stderr,
 				    "hexdump: byte count with multiple conversion characters.\n");
 				exit(1);
 			}
 		}
 		/*
 		 * if format unit byte count not specified, figure it out
 		 * so can adjust rep count later.
 		 */
 		if (!fu->bcnt)
 			for (pr = fu->nextpr; pr; pr = pr->nextpr)
 				fu->bcnt += pr->bcnt;
 	}
 	/*
 	 * if the format string interprets any data at all, and it's
 	 * not the same as the blocksize, and its last format unit
 	 * interprets any data at all, and has no iteration count,
 	 * repeat it as necessary.
 	 *
 	 * if, rep count is greater than 1, no trailing whitespace
 	 * gets output from the last iteration of the format unit.
 	 */
 	for (fu = fs->nextfu;; fu = fu->nextfu) {
 		if (!fu->nextfu && fs->bcnt < blocksize &&
 		    !(fu->flags&F_SETREP) && fu->bcnt)
 			fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
 		if (fu->reps > 1) {
 			for (pr = fu->nextpr;; pr = pr->nextpr)
 				if (!pr->nextpr)
 					break;
 			for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
 				p2 = isspace(*p1) ? p1 : NULL;
 			if (p2)
 				pr->nospace = p2;
 		}
 		if (!fu->nextfu)
 			break;
 	}
 }


 static void escape(register char *p1)
 {
 	register char *p2;

 	/* alphabetic escape sequences have to be done in place */
 	for (p2 = p1;; ++p1, ++p2) {
 		if (!*p1) {
 			*p2 = *p1;
 			break;
 		}
 		if (*p1 == '\\')
 			switch(*++p1) {
 			case 'a':
 			     /* *p2 = '\a'; */
 				*p2 = '\007';
 				break;
 			case 'b':
 				*p2 = '\b';
 				break;
 			case 'f':
 				*p2 = '\f';
 				break;
 			case 'n':
 				*p2 = '\n';
 				break;
 			case 'r':
 				*p2 = '\r';
 				break;
 			case 't':
 				*p2 = '\t';
 				break;
 			case 'v':
 				*p2 = '\v';
 				break;
 			default:
 				*p2 = *p1;
 				break;
 			}
 	}
 }

 static void badcnt(char *s)
 {
 	(void)fprintf(stderr,
 	    "hexdump: bad byte count for conversion character %s.\n", s);
 	exit(1);
 }

 static void badsfmt()
 {
 	(void)fprintf(stderr,
 	    "hexdump: %%s requires a precision or a byte count.\n");
 	exit(1);
 }

 static void badfmt(char *fmt)
 {
 	(void)fprintf(stderr, "hexdump: bad format {%s}\n", fmt);
 	exit(1);
 }

 static void badconv(char *ch)
 {
 	(void)fprintf(stderr, "hexdump: bad conversion character %%%s.\n", ch);
 	exit(1);
 }
	/*
	* Copyright (c) 1989 The Regents of the University of California.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. All advertising materials mentioning features or use of this software
	* must display the following acknowledgement:
	* This product includes software developed by the University of
	* California, Berkeley and its contributors.
	* 4. Neither the name of the University nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#ifndef lint
	static char sccsid[] = "@(#)parse.c 5.6 (Berkeley) 3/9/91";
	#endif /* not lint */

	#include <sys/types.h>
	#include <sys/file.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <ctype.h>
	#include <string.h>
	#include "hexdump.h"

	static void escape(register char *p1);
	static void badcnt(char *s);
	static void badsfmt(void);
	static void badfmt(char *fmt);
	static void badconv(char *ch);

	FU endfu; / format at end-of-data */

	void addfile(char *name)
	{
	register char *p;
	FILE *fp;
	int ch;
	char buf[2048 + 1];

	if (!(fp = fopen(name, "r"))) {
	(void)fprintf(stderr, "hexdump: can't read %s.\n", name);
	exit(1);
	}
	while (fgets(buf, sizeof(buf), fp)) {
	if (!(p = index(buf, '\n'))) {
	(void)fprintf(stderr, "hexdump: line too long.\n");
	while ((ch = getchar()) != '\n' && ch != EOF);
	continue;
	}
	*p = '\0';
	for (p = buf; p && isspace(p); ++p);
	if (!p \|\| p == '#')
	continue;
	add(p);
	}
	(void)fclose(fp);
	}

	void add(char *fmt)
	{
	register char *p;
	static FS **nextfs;
	FS *tfs;
	FU tfu, *nextfu;
	char savep, emalloc();

	/* start new linked list of format units */
	/* NOSTRICT */
	tfs = (FS *)emalloc(sizeof(FS));
	if (!fshead)
	fshead = tfs;
	else
	*nextfs = tfs;
	nextfs = &tfs->nextfs;
	nextfu = &tfs->nextfu;

	/* take the format string and break it up into format units */
	for (p = fmt;;) {
	/* skip leading white space */
	for (; isspace(*p); ++p);
	if (!*p)
	break;

	/* allocate a new format unit and link it in */
	/* NOSTRICT */
	tfu = (FU *)emalloc(sizeof(FU));
	*nextfu = tfu;
	nextfu = &tfu->nextfu;
	tfu->reps = 1;

	/* if leading digit, repetition count */
	if (isdigit(*p)) {
	for (savep = p; isdigit(*p); ++p);
	if (!isspace(p) && p != '/')
	badfmt(fmt);
	/* may overwrite either white space or slash */
	tfu->reps = atoi(savep);
	tfu->flags = F_SETREP;
	/* skip trailing white space */
	for (++p; isspace(*p); ++p);
	}

	/* skip slash and trailing white space */
	if (*p == '/')
	while (isspace(*++p));

	/* byte count */
	if (isdigit(*p)) {
	for (savep = p; isdigit(*p); ++p);
	if (!isspace(*p))
	badfmt(fmt);
	tfu->bcnt = atoi(savep);
	/* skip trailing white space */
	for (++p; isspace(*p); ++p);
	}

	/* format */
	if (*p != '"')
	badfmt(fmt);
	for (savep = ++p; *p != '"';)
	if (*p++ == 0)
	badfmt(fmt);
	if (!(tfu->fmt = malloc(p - savep + 1)))
	nomem();
	(void) strncpy(tfu->fmt, savep, p - savep);
	tfu->fmt[p - savep] = '\0';
	escape(tfu->fmt);
	p++;
	}
	}

	static char *spec = ".#-+ 0123456789";

	int size(FS *fs)
	{
	register FU *fu;
	register int bcnt, cursize;
	register char *fmt;
	int prec;

	/* figure out the data block size needed for each format unit */
	for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
	if (fu->bcnt) {
	cursize += fu->bcnt * fu->reps;
	continue;
	}
	for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
	if (*fmt != '%')
	continue;
	/*
	* skip any special chars -- save precision in
	* case it's a %s format.
	*/
	while (index(spec + 1, *++fmt));
	if (fmt == '.' && isdigit(++fmt)) {
	prec = atoi(fmt);
	while (isdigit(*++fmt));
	}
	switch(*fmt) {
	case 'c':
	bcnt += 1;
	break;
	case 'd': case 'i': case 'o': case 'u':
	case 'x': case 'X':
	bcnt += 4;
	break;
	case 'e': case 'E': case 'f': case 'g': case 'G':
	bcnt += 8;
	break;
	case 's':
	bcnt += prec;
	break;
	case '_':
	switch(*++fmt) {
	case 'c': case 'p': case 'u':
	bcnt += 1;
	break;
	}
	}
	}
	cursize += bcnt * fu->reps;
	}
	return(cursize);
	}

	void rewrite(FS *fs)
	{
	enum { NOTOKAY, USEBCNT, USEPREC } sokay;
	register PR pr, *nextpr = NULL;
	register FU *fu;
	register char p1, p2;
	char savech, *fmtp;
	int nconv, prec = 0;

	for (fu = fs->nextfu; fu; fu = fu->nextfu) {
	/*
	* break each format unit into print units; each
	* conversion character gets its own.
	*/
	for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
	/* NOSTRICT */
	pr = (PR *)emalloc(sizeof(PR));
	if (!fu->nextpr)
	fu->nextpr = pr;
	else
	*nextpr = pr;

	/* skip preceding text and up to the next % sign */
	for (p1 = fmtp; p1 && p1 != '%'; ++p1);

	/* only text in the string */
	if (!*p1) {
	pr->fmt = fmtp;
	pr->flags = F_TEXT;
	break;
	}

	/*
	* get precision for %s -- if have a byte count, don't
	* need it.
	*/
	if (fu->bcnt) {
	sokay = USEBCNT;
	/* skip to conversion character */
	for (++p1; index(spec, *p1); ++p1);
	} else {
	/* skip any special chars, field width */
	while (index(spec + 1, *++p1));
	if (p1 == '.' && isdigit(++p1)) {
	sokay = USEPREC;
	prec = atoi(p1);
	while (isdigit(*++p1));
	}
	else
	sokay = NOTOKAY;
	}

	p2 = p1 + 1; /* set end pointer */

	/*
	* figure out the byte count for each conversion;
	* rewrite the format as necessary, set up blank-
	* padding for end of data.
	*/
	switch(*p1) {
	case 'c':
	pr->flags = F_CHAR;
	switch(fu->bcnt) {
	case 0: case 1:
	pr->bcnt = 1;
	break;
	default:
	p1[1] = '\0';
	badcnt(p1);
	}
	break;
	case 'd': case 'i':
	pr->flags = F_INT;
	goto sw1;
	case 'l':
	++p2;
	switch(p1[1]) {
	case 'd': case 'i':
	++p1;
	pr->flags = F_INT;
	goto sw1;
	case 'o': case 'u': case 'x': case 'X':
	++p1;
	pr->flags = F_UINT;
	goto sw1;
	default:
	p1[2] = '\0';
	badconv(p1);
	}
	/* NOTREACHED */
	case 'o': case 'u': case 'x': case 'X':
	pr->flags = F_UINT;
	sw1: switch(fu->bcnt) {
	case 0: case 4:
	pr->bcnt = 4;
	break;
	case 1:
	pr->bcnt = 1;
	break;
	case 2:
	pr->bcnt = 2;
	break;
	default:
	p1[1] = '\0';
	badcnt(p1);
	}
	break;
	case 'e': case 'E': case 'f': case 'g': case 'G':
	pr->flags = F_DBL;
	switch(fu->bcnt) {
	case 0: case 8:
	pr->bcnt = 8;
	break;
	case 4:
	pr->bcnt = 4;
	break;
	default:
	p1[1] = '\0';
	badcnt(p1);
	}
	break;
	case 's':
	pr->flags = F_STR;
	switch(sokay) {
	case NOTOKAY:
	badsfmt();
	case USEBCNT:
	pr->bcnt = fu->bcnt;
	break;
	case USEPREC:
	pr->bcnt = prec;
	break;
	}
	break;
	case '_':
	++p2;
	switch(p1[1]) {
	case 'A':
	endfu = fu;
	fu->flags \|= F_IGNORE;
	/* FALLTHROUGH */
	case 'a':
	pr->flags = F_ADDRESS;
	++p2;
	switch(p1[2]) {
	case 'd': case 'o': case'x':
	*p1 = p1[2];
	break;
	default:
	p1[3] = '\0';
	badconv(p1);
	}
	break;
	case 'c':
	pr->flags = F_C;
	/* p1 = 'c'; set in conv_c /
	goto sw2;
	case 'p':
	pr->flags = F_P;
	*p1 = 'c';
	goto sw2;
	case 'u':
	pr->flags = F_U;
	/* p1 = 'c'; set in conv_u /
	sw2: switch(fu->bcnt) {
	case 0: case 1:
	pr->bcnt = 1;
	break;
	default:
	p1[2] = '\0';
	badcnt(p1);
	}
	break;
	default:
	p1[2] = '\0';
	badconv(p1);
	}
	break;
	default:
	p1[1] = '\0';
	badconv(p1);
	}

	/*
	* copy to PR format string, set conversion character
	* pointer, update original.
	*/
	savech = *p2;
	p1[1] = '\0';
	if (!(pr->fmt = strdup(fmtp)))
	nomem();
	*p2 = savech;
	pr->cchar = pr->fmt + (p1 - fmtp);
	fmtp = p2;

	/* only one conversion character if byte count */
	if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) {
	(void)fprintf(stderr,
	"hexdump: byte count with multiple conversion characters.\n");
	exit(1);
	}
	}
	/*
	* if format unit byte count not specified, figure it out
	* so can adjust rep count later.
	*/
	if (!fu->bcnt)
	for (pr = fu->nextpr; pr; pr = pr->nextpr)
	fu->bcnt += pr->bcnt;
	}
	/*
	* if the format string interprets any data at all, and it's
	* not the same as the blocksize, and its last format unit
	* interprets any data at all, and has no iteration count,
	* repeat it as necessary.
	*
	* if, rep count is greater than 1, no trailing whitespace
	* gets output from the last iteration of the format unit.
	*/
	for (fu = fs->nextfu;; fu = fu->nextfu) {
	if (!fu->nextfu && fs->bcnt < blocksize &&
	!(fu->flags&F_SETREP) && fu->bcnt)
	fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
	if (fu->reps > 1) {
	for (pr = fu->nextpr;; pr = pr->nextpr)
	if (!pr->nextpr)
	break;
	for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
	p2 = isspace(*p1) ? p1 : NULL;
	if (p2)
	pr->nospace = p2;
	}
	if (!fu->nextfu)
	break;
	}
	}


	static void escape(register char *p1)
	{
	register char *p2;

	/* alphabetic escape sequences have to be done in place */
	for (p2 = p1;; ++p1, ++p2) {
	if (!*p1) {
	p2 = p1;
	break;
	}
	if (*p1 == '\\')
	switch(*++p1) {
	case 'a':
	/* p2 = '\a'; /
	*p2 = '\007';
	break;
	case 'b':
	*p2 = '\b';
	break;
	case 'f':
	*p2 = '\f';
	break;
	case 'n':
	*p2 = '\n';
	break;
	case 'r':
	*p2 = '\r';
	break;
	case 't':
	*p2 = '\t';
	break;
	case 'v':
	*p2 = '\v';
	break;
	default:
	p2 = p1;
	break;
	}
	}
	}

	static void badcnt(char *s)
	{
	(void)fprintf(stderr,
	"hexdump: bad byte count for conversion character %s.\n", s);
	exit(1);
	}

	static void badsfmt()
	{
	(void)fprintf(stderr,
	"hexdump: %%s requires a precision or a byte count.\n");
	exit(1);
	}

	static void badfmt(char *fmt)
	{
	(void)fprintf(stderr, "hexdump: bad format {%s}\n", fmt);
	exit(1);
	}

	static void badconv(char *ch)
	{
	(void)fprintf(stderr, "hexdump: bad conversion character %%%s.\n", ch);
	exit(1);
	}