freebsd-nq/lib/libc/gen/fmtcheck.c
Pedro F. Giffuni d915a14ef0 libc: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-25 17:12:48 +00:00

329 lines
6.9 KiB
C

/* $NetBSD: fmtcheck.c,v 1.8 2008/04/28 20:22:59 martin Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-NetBSD
*
* 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>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <string.h>
#include <ctype.h>
__weak_reference(__fmtcheck, fmtcheck);
const char * __fmtcheck(const char *, const char *);
enum __e_fmtcheck_types {
FMTCHECK_START,
FMTCHECK_SHORT,
FMTCHECK_INT,
FMTCHECK_WINTT,
FMTCHECK_LONG,
FMTCHECK_QUAD,
FMTCHECK_INTMAXT,
FMTCHECK_PTRDIFFT,
FMTCHECK_SIZET,
FMTCHECK_CHARPOINTER,
FMTCHECK_SHORTPOINTER,
FMTCHECK_INTPOINTER,
FMTCHECK_LONGPOINTER,
FMTCHECK_QUADPOINTER,
FMTCHECK_INTMAXTPOINTER,
FMTCHECK_PTRDIFFTPOINTER,
FMTCHECK_SIZETPOINTER,
#ifndef NO_FLOATING_POINT
FMTCHECK_DOUBLE,
FMTCHECK_LONGDOUBLE,
#endif
FMTCHECK_STRING,
FMTCHECK_WSTRING,
FMTCHECK_WIDTH,
FMTCHECK_PRECISION,
FMTCHECK_DONE,
FMTCHECK_UNKNOWN
};
typedef enum __e_fmtcheck_types EFT;
enum e_modifier {
MOD_NONE,
MOD_CHAR,
MOD_SHORT,
MOD_LONG,
MOD_QUAD,
MOD_INTMAXT,
MOD_LONGDOUBLE,
MOD_PTRDIFFT,
MOD_SIZET,
};
#define RETURN(pf,f,r) do { \
*(pf) = (f); \
return r; \
} /*NOTREACHED*/ /*CONSTCOND*/ while (0)
static EFT
get_next_format_from_precision(const char **pf)
{
enum e_modifier modifier;
const char *f;
f = *pf;
switch (*f) {
case 'h':
f++;
if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
if (*f == 'h') {
f++;
modifier = MOD_CHAR;
} else {
modifier = MOD_SHORT;
}
break;
case 'j':
f++;
modifier = MOD_INTMAXT;
break;
case 'l':
f++;
if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
if (*f == 'l') {
f++;
modifier = MOD_QUAD;
} else {
modifier = MOD_LONG;
}
break;
case 'q':
f++;
modifier = MOD_QUAD;
break;
case 't':
f++;
modifier = MOD_PTRDIFFT;
break;
case 'z':
f++;
modifier = MOD_SIZET;
break;
case 'L':
f++;
modifier = MOD_LONGDOUBLE;
break;
default:
modifier = MOD_NONE;
break;
}
if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
if (strchr("diouxX", *f)) {
switch (modifier) {
case MOD_LONG:
RETURN(pf,f,FMTCHECK_LONG);
case MOD_QUAD:
RETURN(pf,f,FMTCHECK_QUAD);
case MOD_INTMAXT:
RETURN(pf,f,FMTCHECK_INTMAXT);
case MOD_PTRDIFFT:
RETURN(pf,f,FMTCHECK_PTRDIFFT);
case MOD_SIZET:
RETURN(pf,f,FMTCHECK_SIZET);
case MOD_CHAR:
case MOD_SHORT:
case MOD_NONE:
RETURN(pf,f,FMTCHECK_INT);
default:
RETURN(pf,f,FMTCHECK_UNKNOWN);
}
}
if (*f == 'n') {
switch (modifier) {
case MOD_CHAR:
RETURN(pf,f,FMTCHECK_CHARPOINTER);
case MOD_SHORT:
RETURN(pf,f,FMTCHECK_SHORTPOINTER);
case MOD_LONG:
RETURN(pf,f,FMTCHECK_LONGPOINTER);
case MOD_QUAD:
RETURN(pf,f,FMTCHECK_QUADPOINTER);
case MOD_INTMAXT:
RETURN(pf,f,FMTCHECK_INTMAXTPOINTER);
case MOD_PTRDIFFT:
RETURN(pf,f,FMTCHECK_PTRDIFFTPOINTER);
case MOD_SIZET:
RETURN(pf,f,FMTCHECK_SIZETPOINTER);
case MOD_NONE:
RETURN(pf,f,FMTCHECK_INTPOINTER);
default:
RETURN(pf,f,FMTCHECK_UNKNOWN);
}
}
if (strchr("DOU", *f)) {
if (modifier != MOD_NONE)
RETURN(pf,f,FMTCHECK_UNKNOWN);
RETURN(pf,f,FMTCHECK_LONG);
}
#ifndef NO_FLOATING_POINT
if (strchr("aAeEfFgG", *f)) {
switch (modifier) {
case MOD_LONGDOUBLE:
RETURN(pf,f,FMTCHECK_LONGDOUBLE);
case MOD_LONG:
case MOD_NONE:
RETURN(pf,f,FMTCHECK_DOUBLE);
default:
RETURN(pf,f,FMTCHECK_UNKNOWN);
}
}
#endif
if (*f == 'c') {
switch (modifier) {
case MOD_LONG:
RETURN(pf,f,FMTCHECK_WINTT);
case MOD_NONE:
RETURN(pf,f,FMTCHECK_INT);
default:
RETURN(pf,f,FMTCHECK_UNKNOWN);
}
}
if (*f == 'C') {
if (modifier != MOD_NONE)
RETURN(pf,f,FMTCHECK_UNKNOWN);
RETURN(pf,f,FMTCHECK_WINTT);
}
if (*f == 's') {
switch (modifier) {
case MOD_LONG:
RETURN(pf,f,FMTCHECK_WSTRING);
case MOD_NONE:
RETURN(pf,f,FMTCHECK_STRING);
default:
RETURN(pf,f,FMTCHECK_UNKNOWN);
}
}
if (*f == 'S') {
if (modifier != MOD_NONE)
RETURN(pf,f,FMTCHECK_UNKNOWN);
RETURN(pf,f,FMTCHECK_WSTRING);
}
if (*f == 'p') {
if (modifier != MOD_NONE)
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(*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(*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;
}