glibc/locale/weight.h
Zack Weinberg 9090848d06 Narrowing the visibility of libc-internal.h even further.
posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar
to what was done with libc-diag.h, I have split the definitions of
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN
to a new header, libc-pointer-arith.h.

It then occurred to me that the remaining declarations in libc-internal.h
are mostly to do with early initialization, and probably most of the
files including it, even in the core code, don't need it anymore.  Indeed,
only 19 files actually need what remains of libc-internal.h.  23 others
need libc-diag.h instead, and 12 need libc-pointer-arith.h instead.
No file needs more than one of them, and 16 don't need any of them!

So, with this patch, libc-internal.h stops including libc-diag.h as
well as losing the pointer arithmetic macros, and all including files
are adjusted.

        * include/libc-pointer-arith.h: New file.  Define
	cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and
        PTR_ALIGN_DOWN here.
        * include/libc-internal.h: Definitions of above macros
	moved from here.  Don't include libc-diag.h anymore either.
	* posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h.
        Don't include libc-internal.h.

	* debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c
	* io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c
	* nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c
	* string/strcoll_l.c, sysdeps/nacl/brk.c
	* sysdeps/unix/clock_settime.c
	* sysdeps/unix/sysv/linux/i386/get_clockfreq.c
	* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
	* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
	* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c:
	Don't include libc-internal.h.

	* elf/get-dynamic-info.h, iconv/loop.c
	* iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h
	* misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h
	* nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c
	* soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c
	* sysdeps/ieee754/dbl-64/k_rem_pio2.c
	* sysdeps/ieee754/flt-32/e_lgammaf_r.c
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c
	* sysdeps/ieee754/ldbl-128/k_tanl.c
	* sysdeps/ieee754/ldbl-128ibm/k_tanl.c
	* sysdeps/ieee754/ldbl-96/e_lgammal_r.c
	* sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h:
	Include libc-diag.h instead of libc-internal.h.

        * elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c
        * nptl/nptl-init.c, string/strcspn.c, string/strspn.c
	* malloc/malloc.c, sysdeps/i386/nptl/tls.h
	* sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h
	* sysdeps/unix/sysv/linux/spawni.c
        * sysdeps/x86_64/nptl/tls.h:
        Include libc-pointer-arith.h instead of libc-internal.h.

	* elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h
	* sysdeps/x86_64/atomic-machine.h:
        Add multiple include guard.
2017-03-01 20:33:46 -05:00

150 lines
4.0 KiB
C

/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Ulrich Drepper, <drepper@cygnus.com>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _WEIGHT_H_
#define _WEIGHT_H_ 1
#include <libc-diag.h>
/* Find index of weight. */
static inline int32_t __attribute__ ((always_inline))
findidx (const int32_t *table,
const int32_t *indirect,
const unsigned char *extra,
const unsigned char **cpp, size_t len)
{
int_fast32_t i = table[*(*cpp)++];
const unsigned char *cp;
const unsigned char *usrc;
if (i >= 0)
/* This is an index into the weight table. Cool. */
return i;
/* Oh well, more than one sequence starting with this byte.
Search for the correct one. */
cp = &extra[-i];
usrc = *cpp;
--len;
while (1)
{
size_t nhere;
/* The first thing is the index. */
i = *((const int32_t *) cp);
cp += sizeof (int32_t);
/* Next is the length of the byte sequence. These are always
short byte sequences so there is no reason to call any
function (even if they are inlined). */
nhere = *cp++;
if (i >= 0)
{
/* It is a single character. If it matches we found our
index. Note that at the end of each list there is an
entry of length zero which represents the single byte
sequence. The first (and here only) byte was tested
already. */
size_t cnt;
/* With GCC 5.3 when compiling with -Os the compiler warns
that seq2.back_us, which becomes usrc, might be used
uninitialized. This can't be true because we pass a length
of -1 for len at the same time which means that this loop
never executes. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
for (cnt = 0; cnt < nhere && cnt < len; ++cnt)
if (cp[cnt] != usrc[cnt])
break;
DIAG_POP_NEEDS_COMMENT;
if (cnt == nhere)
{
/* Found it. */
*cpp += nhere;
return i;
}
/* Up to the next entry. */
cp += nhere;
if (!LOCFILE_ALIGNED_P (1 + nhere))
cp += LOCFILE_ALIGN - (1 + nhere) % LOCFILE_ALIGN;
}
else
{
/* This is a range of characters. First decide whether the
current byte sequence lies in the range. */
size_t cnt;
size_t offset = 0;
for (cnt = 0; cnt < nhere && cnt < len; ++cnt)
if (cp[cnt] != usrc[cnt])
break;
if (cnt != nhere)
{
if (cnt == len || cp[cnt] > usrc[cnt])
{
/* Cannot be in this range. */
cp += 2 * nhere;
if (!LOCFILE_ALIGNED_P (1 + 2 * nhere))
cp += (LOCFILE_ALIGN
- (1 + 2 * nhere) % LOCFILE_ALIGN);
continue;
}
/* Test against the end of the range. */
for (cnt = 0; cnt < nhere; ++cnt)
if (cp[nhere + cnt] != usrc[cnt])
break;
if (cnt != nhere && cp[nhere + cnt] < usrc[cnt])
{
/* Cannot be in this range. */
cp += 2 * nhere;
if (!LOCFILE_ALIGNED_P (1 + 2 * nhere))
cp += (LOCFILE_ALIGN
- (1 + 2 * nhere) % LOCFILE_ALIGN);
continue;
}
/* This range matches the next characters. Now find
the offset in the indirect table. */
for (cnt = 0; cp[cnt] == usrc[cnt]; ++cnt);
do
{
offset <<= 8;
offset += usrc[cnt] - cp[cnt];
}
while (++cnt < nhere);
}
*cpp += nhere;
return indirect[-i + offset];
}
}
/* NOTREACHED */
return 0x43219876;
}
#endif /* weight.h */