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File: [cvs.NetBSD.org] / src / lib / libc / gen / fmtcheck.c (download)

Revision 1.8, Mon Apr 28 20:22:59 2008 UTC (6 years, 3 months ago) by martin
Branch: MAIN
CVS Tags: yamt-pf42-base4, yamt-pf42-base3, yamt-pf42-base2, yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, wrstuden-revivesa-base-3, wrstuden-revivesa-base-2, wrstuden-revivesa-base-1, wrstuden-revivesa-base, wrstuden-revivesa, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, netbsd-5-base, netbsd-5-2-RELEASE, netbsd-5-2-RC1, netbsd-5-2-2-RELEASE, netbsd-5-2-1-RELEASE, netbsd-5-2, netbsd-5-1-RELEASE, netbsd-5-1-RC4, netbsd-5-1-RC3, netbsd-5-1-RC2, netbsd-5-1-RC1, netbsd-5-1-4-RELEASE, netbsd-5-1-3-RELEASE, netbsd-5-1-2-RELEASE, netbsd-5-1-1-RELEASE, netbsd-5-1, netbsd-5-0-RELEASE, netbsd-5-0-RC4, netbsd-5-0-RC3, netbsd-5-0-RC2, netbsd-5-0-RC1, netbsd-5-0-2-RELEASE, netbsd-5-0-1-RELEASE, netbsd-5-0, netbsd-5, matt-premerge-20091211, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, matt-nb5-pq3-base, matt-nb5-pq3, matt-nb5-mips64-u2-k2-k4-k7-k8-k9, matt-nb5-mips64-u1-k1-k5, matt-nb5-mips64-premerge-20101231, matt-nb5-mips64-premerge-20091211, matt-nb5-mips64-k15, matt-nb5-mips64, matt-nb4-mips64-k7-u2a-k9b, matt-mips64-premerge-20101231, matt-mips64-base2, jym-xensuspend-nbase, jym-xensuspend-base, jym-xensuspend, hpcarm-cleanup-nbase, christos-time_t-nbase, christos-time_t-base, cherry-xenmp-base, cherry-xenmp, bouyer-quota2-nbase, bouyer-quota2-base, bouyer-quota2, agc-symver-base, agc-symver
Branch point for: tls-maxphys, tls-earlyentropy, christos-time_t
Changes since 1.7: +2 -9 lines

Remove clause 3 and 4 from TNF licenses

/*	$NetBSD: fmtcheck.c,v 1.8 2008/04/28 20:22:59 martin Exp $	*/

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code was contributed to The NetBSD Foundation by Allen Briggs.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fmtcheck.c,v 1.8 2008/04/28 20:22:59 martin Exp $");
#endif

#include "namespace.h"

#include <stdio.h>
#include <string.h>
#include <ctype.h>

#ifdef __weak_alias
__weak_alias(fmtcheck,__fmtcheck)
#endif

enum __e_fmtcheck_types {
	FMTCHECK_START,
	FMTCHECK_SHORT,
	FMTCHECK_INT,
	FMTCHECK_LONG,
	FMTCHECK_QUAD,
	FMTCHECK_SHORTPOINTER,
	FMTCHECK_INTPOINTER,
	FMTCHECK_LONGPOINTER,
	FMTCHECK_QUADPOINTER,
	FMTCHECK_DOUBLE,
	FMTCHECK_LONGDOUBLE,
	FMTCHECK_STRING,
	FMTCHECK_WIDTH,
	FMTCHECK_PRECISION,
	FMTCHECK_DONE,
	FMTCHECK_UNKNOWN
};
typedef enum __e_fmtcheck_types EFT;

#define RETURN(pf,f,r) do { \
			*(pf) = (f); \
			return r; \
		       } /*NOTREACHED*/ /*CONSTCOND*/ while (0)

static EFT
get_next_format_from_precision(const char **pf)
{
	int		sh, lg, quad, longdouble;
	const char	*f;

	sh = lg = quad = longdouble = 0;

	f = *pf;
	switch (*f) {
	case 'h':
		f++;
		sh = 1;
		break;
	case 'l':
		f++;
		if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
		if (*f == 'l') {
			f++;
			quad = 1;
		} else {
			lg = 1;
		}
		break;
	case 'q':
		f++;
		quad = 1;
		break;
	case 'L':
		f++;
		longdouble = 1;
		break;
	default:
		break;
	}
	if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
	if (strchr("diouxX", *f)) {
		if (longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		if (lg)
			RETURN(pf,f,FMTCHECK_LONG);
		if (quad)
			RETURN(pf,f,FMTCHECK_QUAD);
		RETURN(pf,f,FMTCHECK_INT);
	}
	if (*f == 'n') {
		if (longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		if (sh)
			RETURN(pf,f,FMTCHECK_SHORTPOINTER);
		if (lg)
			RETURN(pf,f,FMTCHECK_LONGPOINTER);
		if (quad)
			RETURN(pf,f,FMTCHECK_QUADPOINTER);
		RETURN(pf,f,FMTCHECK_INTPOINTER);
	}
	if (strchr("DOU", *f)) {
		if (sh + lg + quad + longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		RETURN(pf,f,FMTCHECK_LONG);
	}
	if (strchr("eEfg", *f)) {
		if (longdouble)
			RETURN(pf,f,FMTCHECK_LONGDOUBLE);
		if (sh + lg + quad)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		RETURN(pf,f,FMTCHECK_DOUBLE);
	}
	if (*f == 'c') {
		if (sh + lg + quad + longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		RETURN(pf,f,FMTCHECK_INT);
	}
	if (*f == 's') {
		if (sh + lg + quad + longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		RETURN(pf,f,FMTCHECK_STRING);
	}
	if (*f == 'p') {
		if (sh + lg + quad + longdouble)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		RETURN(pf,f,FMTCHECK_LONG);
	}
	RETURN(pf,f,FMTCHECK_UNKNOWN);
	/*NOTREACHED*/
}

static EFT
get_next_format_from_width(const char **pf)
{
	const char	*f;

	f = *pf;
	if (*f == '.') {
		f++;
		if (*f == '*') {
			RETURN(pf,f,FMTCHECK_PRECISION);
		}
		/* eat any precision (empty is allowed) */
		while (isdigit((unsigned char)*f)) f++;
		if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
	}
	RETURN(pf,f,get_next_format_from_precision(pf));
	/*NOTREACHED*/
}

static EFT
get_next_format(const char **pf, EFT eft)
{
	int		infmt;
	const char	*f;

	if (eft == FMTCHECK_WIDTH) {
		(*pf)++;
		return get_next_format_from_width(pf);
	} else if (eft == FMTCHECK_PRECISION) {
		(*pf)++;
		return get_next_format_from_precision(pf);
	}

	f = *pf;
	infmt = 0;
	while (!infmt) {
		f = strchr(f, '%');
		if (f == NULL)
			RETURN(pf,f,FMTCHECK_DONE);
		f++;
		if (!*f)
			RETURN(pf,f,FMTCHECK_UNKNOWN);
		if (*f != '%')
			infmt = 1;
		else
			f++;
	}

	/* Eat any of the flags */
	while (*f && (strchr("#0- +", *f)))
		f++;

	if (*f == '*') {
		RETURN(pf,f,FMTCHECK_WIDTH);
	}
	/* eat any width */
	while (isdigit((unsigned char)*f)) f++;
	if (!*f) {
		RETURN(pf,f,FMTCHECK_UNKNOWN);
	}

	RETURN(pf,f,get_next_format_from_width(pf));
	/*NOTREACHED*/
}

const char *
fmtcheck(const char *f1, const char *f2)
{
	const char	*f1p, *f2p;
	EFT		f1t, f2t;

	if (!f1) return f2;
	
	f1p = f1;
	f1t = FMTCHECK_START;
	f2p = f2;
	f2t = FMTCHECK_START;
	while ((f1t = get_next_format(&f1p, f1t)) != FMTCHECK_DONE) {
		if (f1t == FMTCHECK_UNKNOWN)
			return f2;
		f2t = get_next_format(&f2p, f2t);
		if (f1t != f2t)
			return f2;
	}
	return f1;
}