9f36610f9e
reallocarray(3) is a non portable extension that originated in OpenBSD. Given that it is already in FreeBSD's libc it is useful for the cases where reallocation involves a multiplication. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D9955
775 lines
17 KiB
C
775 lines
17 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This is the code responsible for handling positional arguments
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* (%m$ and %m$.n$) for vfprintf() and vfwprintf().
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*/
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#include "namespace.h"
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#include <sys/types.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "un-namespace.h"
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#include "printflocal.h"
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#ifdef NL_ARGMAX
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#define MAX_POSARG NL_ARGMAX
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#else
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#define MAX_POSARG 65536
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#endif
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/*
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* Type ids for argument type table.
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*/
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enum typeid {
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T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
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T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
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T_PTRDIFFT, TP_PTRDIFFT, T_SSIZET, T_SIZET, TP_SSIZET,
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T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
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T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
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};
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/* An expandable array of types. */
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struct typetable {
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enum typeid *table; /* table of types */
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enum typeid stattable[STATIC_ARG_TBL_SIZE];
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u_int tablesize; /* current size of type table */
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u_int tablemax; /* largest used index in table */
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u_int nextarg; /* 1-based argument index */
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};
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static int __grow_type_table(struct typetable *);
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static void build_arg_table (struct typetable *, va_list, union arg **);
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/*
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* Initialize a struct typetable.
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*/
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static inline void
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inittypes(struct typetable *types)
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{
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u_int n;
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types->table = types->stattable;
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types->tablesize = STATIC_ARG_TBL_SIZE;
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types->tablemax = 0;
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types->nextarg = 1;
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for (n = 0; n < STATIC_ARG_TBL_SIZE; n++)
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types->table[n] = T_UNUSED;
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}
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/*
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* struct typetable destructor.
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*/
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static inline void
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freetypes(struct typetable *types)
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{
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if (types->table != types->stattable)
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free (types->table);
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}
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/*
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* Ensure that there is space to add a new argument type to the type table.
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* Expand the table if necessary. Returns 0 on success.
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*/
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static inline int
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_ensurespace(struct typetable *types)
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{
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if (types->nextarg >= types->tablesize) {
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if (__grow_type_table(types))
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return (-1);
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}
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if (types->nextarg > types->tablemax)
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types->tablemax = types->nextarg;
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return (0);
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}
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/*
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* Add an argument type to the table, expanding if necessary.
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* Returns 0 on success.
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*/
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static inline int
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addtype(struct typetable *types, enum typeid type)
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{
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if (_ensurespace(types))
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return (-1);
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types->table[types->nextarg++] = type;
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return (0);
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}
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static inline int
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addsarg(struct typetable *types, int flags)
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{
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if (_ensurespace(types))
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return (-1);
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if (flags & INTMAXT)
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types->table[types->nextarg++] = T_INTMAXT;
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else if (flags & SIZET)
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types->table[types->nextarg++] = T_SSIZET;
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else if (flags & PTRDIFFT)
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types->table[types->nextarg++] = T_PTRDIFFT;
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else if (flags & LLONGINT)
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types->table[types->nextarg++] = T_LLONG;
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else if (flags & LONGINT)
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types->table[types->nextarg++] = T_LONG;
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else
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types->table[types->nextarg++] = T_INT;
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return (0);
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}
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static inline int
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adduarg(struct typetable *types, int flags)
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{
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if (_ensurespace(types))
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return (-1);
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if (flags & INTMAXT)
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types->table[types->nextarg++] = T_UINTMAXT;
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else if (flags & SIZET)
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types->table[types->nextarg++] = T_SIZET;
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else if (flags & PTRDIFFT)
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types->table[types->nextarg++] = T_SIZET;
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else if (flags & LLONGINT)
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types->table[types->nextarg++] = T_U_LLONG;
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else if (flags & LONGINT)
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types->table[types->nextarg++] = T_U_LONG;
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else
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types->table[types->nextarg++] = T_U_INT;
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return (0);
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}
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/*
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* Add * arguments to the type array.
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*/
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static inline int
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addaster(struct typetable *types, char **fmtp)
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{
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char *cp;
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u_int n2;
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n2 = 0;
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cp = *fmtp;
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while (is_digit(*cp)) {
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n2 = 10 * n2 + to_digit(*cp);
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cp++;
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}
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if (*cp == '$') {
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u_int hold = types->nextarg;
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types->nextarg = n2;
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if (addtype(types, T_INT))
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return (-1);
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types->nextarg = hold;
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*fmtp = ++cp;
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} else {
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if (addtype(types, T_INT))
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return (-1);
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}
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return (0);
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}
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static inline int
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addwaster(struct typetable *types, wchar_t **fmtp)
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{
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wchar_t *cp;
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u_int n2;
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n2 = 0;
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cp = *fmtp;
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while (is_digit(*cp)) {
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n2 = 10 * n2 + to_digit(*cp);
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cp++;
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}
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if (*cp == '$') {
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u_int hold = types->nextarg;
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types->nextarg = n2;
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if (addtype(types, T_INT))
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return (-1);
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types->nextarg = hold;
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*fmtp = ++cp;
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} else {
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if (addtype(types, T_INT))
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return (-1);
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}
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return (0);
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}
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/*
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* Find all arguments when a positional parameter is encountered. Returns a
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* table, indexed by argument number, of pointers to each arguments. The
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* initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
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* It will be replaces with a malloc-ed one if it overflows.
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* Returns 0 on success. On failure, returns nonzero and sets errno.
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*/
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int
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__find_arguments (const char *fmt0, va_list ap, union arg **argtable)
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{
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char *fmt; /* format string */
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int ch; /* character from fmt */
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u_int n; /* handy integer (short term usage) */
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int error;
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int flags; /* flags as above */
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struct typetable types; /* table of types */
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fmt = (char *)fmt0;
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inittypes(&types);
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error = 0;
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/*
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* Scan the format for conversions (`%' character).
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*/
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for (;;) {
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while ((ch = *fmt) != '\0' && ch != '%')
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fmt++;
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if (ch == '\0')
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goto done;
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fmt++; /* skip over '%' */
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flags = 0;
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rflag: ch = *fmt++;
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reswitch: switch (ch) {
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case ' ':
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case '#':
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goto rflag;
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case '*':
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if ((error = addaster(&types, &fmt)))
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goto error;
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goto rflag;
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case '-':
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case '+':
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case '\'':
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goto rflag;
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case '.':
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if ((ch = *fmt++) == '*') {
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if ((error = addaster(&types, &fmt)))
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goto error;
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goto rflag;
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}
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while (is_digit(ch)) {
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ch = *fmt++;
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}
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goto reswitch;
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case '0':
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goto rflag;
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case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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n = 0;
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do {
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n = 10 * n + to_digit(ch);
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/* Detect overflow */
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if (n > MAX_POSARG) {
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error = -1;
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goto error;
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}
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ch = *fmt++;
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} while (is_digit(ch));
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if (ch == '$') {
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types.nextarg = n;
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goto rflag;
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}
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goto reswitch;
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#ifndef NO_FLOATING_POINT
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case 'L':
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flags |= LONGDBL;
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goto rflag;
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#endif
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case 'h':
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if (flags & SHORTINT) {
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flags &= ~SHORTINT;
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flags |= CHARINT;
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} else
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flags |= SHORTINT;
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goto rflag;
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case 'j':
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flags |= INTMAXT;
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goto rflag;
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case 'l':
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if (flags & LONGINT) {
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flags &= ~LONGINT;
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flags |= LLONGINT;
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} else
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flags |= LONGINT;
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goto rflag;
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case 'q':
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flags |= LLONGINT; /* not necessarily */
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goto rflag;
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case 't':
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flags |= PTRDIFFT;
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goto rflag;
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case 'z':
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flags |= SIZET;
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goto rflag;
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case 'C':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'c':
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error = addtype(&types,
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(flags & LONGINT) ? T_WINT : T_INT);
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if (error)
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goto error;
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break;
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case 'D':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'd':
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case 'i':
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if ((error = addsarg(&types, flags)))
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goto error;
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break;
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#ifndef NO_FLOATING_POINT
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case 'a':
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case 'A':
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case 'e':
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case 'E':
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case 'f':
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case 'g':
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case 'G':
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error = addtype(&types,
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(flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE);
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if (error)
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goto error;
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break;
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#endif /* !NO_FLOATING_POINT */
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case 'n':
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if (flags & INTMAXT)
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error = addtype(&types, TP_INTMAXT);
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else if (flags & PTRDIFFT)
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error = addtype(&types, TP_PTRDIFFT);
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else if (flags & SIZET)
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error = addtype(&types, TP_SSIZET);
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else if (flags & LLONGINT)
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error = addtype(&types, TP_LLONG);
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else if (flags & LONGINT)
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error = addtype(&types, TP_LONG);
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else if (flags & SHORTINT)
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error = addtype(&types, TP_SHORT);
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else if (flags & CHARINT)
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error = addtype(&types, TP_SCHAR);
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else
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error = addtype(&types, TP_INT);
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if (error)
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goto error;
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continue; /* no output */
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case 'O':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'o':
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if ((error = adduarg(&types, flags)))
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goto error;
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break;
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case 'p':
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if ((error = addtype(&types, TP_VOID)))
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goto error;
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break;
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case 'S':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 's':
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error = addtype(&types,
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(flags & LONGINT) ? TP_WCHAR : TP_CHAR);
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if (error)
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goto error;
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break;
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case 'U':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'u':
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case 'X':
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case 'x':
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if ((error = adduarg(&types, flags)))
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goto error;
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break;
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default: /* "%?" prints ?, unless ? is NUL */
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if (ch == '\0')
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goto done;
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break;
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}
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}
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done:
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build_arg_table(&types, ap, argtable);
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error:
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freetypes(&types);
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return (error || *argtable == NULL);
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}
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/* wchar version of __find_arguments. */
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int
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__find_warguments (const wchar_t *fmt0, va_list ap, union arg **argtable)
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{
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wchar_t *fmt; /* format string */
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wchar_t ch; /* character from fmt */
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u_int n; /* handy integer (short term usage) */
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int error;
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int flags; /* flags as above */
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struct typetable types; /* table of types */
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fmt = (wchar_t *)fmt0;
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inittypes(&types);
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error = 0;
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|
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/*
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* Scan the format for conversions (`%' character).
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*/
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for (;;) {
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while ((ch = *fmt) != '\0' && ch != '%')
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fmt++;
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if (ch == '\0')
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goto done;
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fmt++; /* skip over '%' */
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flags = 0;
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rflag: ch = *fmt++;
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reswitch: switch (ch) {
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case ' ':
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case '#':
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goto rflag;
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case '*':
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if ((error = addwaster(&types, &fmt)))
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goto error;
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goto rflag;
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|
case '-':
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|
case '+':
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|
case '\'':
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goto rflag;
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|
case '.':
|
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if ((ch = *fmt++) == '*') {
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if ((error = addwaster(&types, &fmt)))
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goto error;
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goto rflag;
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}
|
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while (is_digit(ch)) {
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ch = *fmt++;
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}
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goto reswitch;
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case '0':
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goto rflag;
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|
case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
|
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n = 0;
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do {
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n = 10 * n + to_digit(ch);
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|
/* Detect overflow */
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|
if (n > MAX_POSARG) {
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error = -1;
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goto error;
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|
}
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ch = *fmt++;
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} while (is_digit(ch));
|
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if (ch == '$') {
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types.nextarg = n;
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goto rflag;
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|
}
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|
goto reswitch;
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|
#ifndef NO_FLOATING_POINT
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|
case 'L':
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flags |= LONGDBL;
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goto rflag;
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|
#endif
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|
case 'h':
|
|
if (flags & SHORTINT) {
|
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flags &= ~SHORTINT;
|
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flags |= CHARINT;
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} else
|
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flags |= SHORTINT;
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goto rflag;
|
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case 'j':
|
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flags |= INTMAXT;
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goto rflag;
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case 'l':
|
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if (flags & LONGINT) {
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flags &= ~LONGINT;
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flags |= LLONGINT;
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} else
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flags |= LONGINT;
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goto rflag;
|
|
case 'q':
|
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flags |= LLONGINT; /* not necessarily */
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goto rflag;
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case 't':
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flags |= PTRDIFFT;
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goto rflag;
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case 'z':
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flags |= SIZET;
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goto rflag;
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case 'C':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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|
case 'c':
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error = addtype(&types,
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(flags & LONGINT) ? T_WINT : T_INT);
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if (error)
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goto error;
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break;
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case 'D':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'd':
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case 'i':
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if ((error = addsarg(&types, flags)))
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goto error;
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break;
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|
#ifndef NO_FLOATING_POINT
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|
case 'a':
|
|
case 'A':
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
error = addtype(&types,
|
|
(flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE);
|
|
if (error)
|
|
goto error;
|
|
break;
|
|
#endif /* !NO_FLOATING_POINT */
|
|
case 'n':
|
|
if (flags & INTMAXT)
|
|
error = addtype(&types, TP_INTMAXT);
|
|
else if (flags & PTRDIFFT)
|
|
error = addtype(&types, TP_PTRDIFFT);
|
|
else if (flags & SIZET)
|
|
error = addtype(&types, TP_SSIZET);
|
|
else if (flags & LLONGINT)
|
|
error = addtype(&types, TP_LLONG);
|
|
else if (flags & LONGINT)
|
|
error = addtype(&types, TP_LONG);
|
|
else if (flags & SHORTINT)
|
|
error = addtype(&types, TP_SHORT);
|
|
else if (flags & CHARINT)
|
|
error = addtype(&types, TP_SCHAR);
|
|
else
|
|
error = addtype(&types, TP_INT);
|
|
if (error)
|
|
goto error;
|
|
continue; /* no output */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
if ((error = adduarg(&types, flags)))
|
|
goto error;
|
|
break;
|
|
case 'p':
|
|
if ((error = addtype(&types, TP_VOID)))
|
|
goto error;
|
|
break;
|
|
case 'S':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 's':
|
|
error = addtype(&types,
|
|
(flags & LONGINT) ? TP_WCHAR : TP_CHAR);
|
|
if (error)
|
|
goto error;
|
|
break;
|
|
case 'U':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'u':
|
|
case 'X':
|
|
case 'x':
|
|
if ((error = adduarg(&types, flags)))
|
|
goto error;
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
break;
|
|
}
|
|
}
|
|
done:
|
|
build_arg_table(&types, ap, argtable);
|
|
error:
|
|
freetypes(&types);
|
|
return (error || *argtable == NULL);
|
|
}
|
|
|
|
/*
|
|
* Increase the size of the type table. Returns 0 on success.
|
|
*/
|
|
static int
|
|
__grow_type_table(struct typetable *types)
|
|
{
|
|
enum typeid *const oldtable = types->table;
|
|
const int oldsize = types->tablesize;
|
|
enum typeid *newtable;
|
|
u_int n, newsize;
|
|
|
|
/* Detect overflow */
|
|
if (types->nextarg > NL_ARGMAX)
|
|
return (-1);
|
|
|
|
newsize = oldsize * 2;
|
|
if (newsize < types->nextarg + 1)
|
|
newsize = types->nextarg + 1;
|
|
if (oldsize == STATIC_ARG_TBL_SIZE) {
|
|
if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL)
|
|
return (-1);
|
|
bcopy(oldtable, newtable, oldsize * sizeof(enum typeid));
|
|
} else {
|
|
newtable = reallocarray(oldtable, newsize, sizeof(enum typeid));
|
|
if (newtable == NULL)
|
|
return (-1);
|
|
}
|
|
for (n = oldsize; n < newsize; n++)
|
|
newtable[n] = T_UNUSED;
|
|
|
|
types->table = newtable;
|
|
types->tablesize = newsize;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Build the argument table from the completed type table.
|
|
* On malloc failure, *argtable is set to NULL.
|
|
*/
|
|
static void
|
|
build_arg_table(struct typetable *types, va_list ap, union arg **argtable)
|
|
{
|
|
u_int n;
|
|
|
|
if (types->tablemax >= STATIC_ARG_TBL_SIZE) {
|
|
*argtable = (union arg *)
|
|
malloc (sizeof (union arg) * (types->tablemax + 1));
|
|
if (*argtable == NULL)
|
|
return;
|
|
}
|
|
|
|
(*argtable) [0].intarg = 0;
|
|
for (n = 1; n <= types->tablemax; n++) {
|
|
switch (types->table[n]) {
|
|
case T_UNUSED: /* whoops! */
|
|
(*argtable) [n].intarg = va_arg (ap, int);
|
|
break;
|
|
case TP_SCHAR:
|
|
(*argtable) [n].pschararg = va_arg (ap, signed char *);
|
|
break;
|
|
case TP_SHORT:
|
|
(*argtable) [n].pshortarg = va_arg (ap, short *);
|
|
break;
|
|
case T_INT:
|
|
(*argtable) [n].intarg = va_arg (ap, int);
|
|
break;
|
|
case T_U_INT:
|
|
(*argtable) [n].uintarg = va_arg (ap, unsigned int);
|
|
break;
|
|
case TP_INT:
|
|
(*argtable) [n].pintarg = va_arg (ap, int *);
|
|
break;
|
|
case T_LONG:
|
|
(*argtable) [n].longarg = va_arg (ap, long);
|
|
break;
|
|
case T_U_LONG:
|
|
(*argtable) [n].ulongarg = va_arg (ap, unsigned long);
|
|
break;
|
|
case TP_LONG:
|
|
(*argtable) [n].plongarg = va_arg (ap, long *);
|
|
break;
|
|
case T_LLONG:
|
|
(*argtable) [n].longlongarg = va_arg (ap, long long);
|
|
break;
|
|
case T_U_LLONG:
|
|
(*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
|
|
break;
|
|
case TP_LLONG:
|
|
(*argtable) [n].plonglongarg = va_arg (ap, long long *);
|
|
break;
|
|
case T_PTRDIFFT:
|
|
(*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
|
|
break;
|
|
case TP_PTRDIFFT:
|
|
(*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
|
|
break;
|
|
case T_SIZET:
|
|
(*argtable) [n].sizearg = va_arg (ap, size_t);
|
|
break;
|
|
case T_SSIZET:
|
|
(*argtable) [n].sizearg = va_arg (ap, ssize_t);
|
|
break;
|
|
case TP_SSIZET:
|
|
(*argtable) [n].pssizearg = va_arg (ap, ssize_t *);
|
|
break;
|
|
case T_INTMAXT:
|
|
(*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
|
|
break;
|
|
case T_UINTMAXT:
|
|
(*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
|
|
break;
|
|
case TP_INTMAXT:
|
|
(*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
|
|
break;
|
|
case T_DOUBLE:
|
|
#ifndef NO_FLOATING_POINT
|
|
(*argtable) [n].doublearg = va_arg (ap, double);
|
|
#endif
|
|
break;
|
|
case T_LONG_DOUBLE:
|
|
#ifndef NO_FLOATING_POINT
|
|
(*argtable) [n].longdoublearg = va_arg (ap, long double);
|
|
#endif
|
|
break;
|
|
case TP_CHAR:
|
|
(*argtable) [n].pchararg = va_arg (ap, char *);
|
|
break;
|
|
case TP_VOID:
|
|
(*argtable) [n].pvoidarg = va_arg (ap, void *);
|
|
break;
|
|
case T_WINT:
|
|
(*argtable) [n].wintarg = va_arg (ap, wint_t);
|
|
break;
|
|
case TP_WCHAR:
|
|
(*argtable) [n].pwchararg = va_arg (ap, wchar_t *);
|
|
break;
|
|
}
|
|
}
|
|
}
|