mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-19 19:43:34 -04:00
Ulf Hermann
575198c29a
config.h doesn't have include guards, so including it twice is bad. We deal with this by checking for PACKAGE_NAME, but only in some places. Once we start using gnulib, we will need to include config.h before any gnulib-generated headers. This is problematic if we include it transitively through our own private headers. In order to set a clear rule about inclusion of config.h, it is now included in every .c file as first header, but not in any header. This will definitely avoid double-inclusion and satisfy the condition that it has to be included before gnulib headers. It comes at the price of adding some redundancy, but there is no clean way to avoid this. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/* Declarations for common convenience functions.
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Copyright (C) 2006-2011 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifndef LIB_SYSTEM_H
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#define LIB_SYSTEM_H 1
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/param.h>
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#include <endian.h>
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#include <byteswap.h>
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#include <unistd.h>
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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# define LE32(n) (n)
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# define LE64(n) (n)
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# define BE32(n) bswap_32 (n)
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# define BE64(n) bswap_64 (n)
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#elif __BYTE_ORDER == __BIG_ENDIAN
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# define BE32(n) (n)
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# define BE64(n) (n)
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# define LE32(n) bswap_32 (n)
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# define LE64(n) bswap_64 (n)
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#else
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# error "Unknown byte order"
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#endif
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#ifndef MAX
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#define MAX(m, n) ((m) < (n) ? (n) : (m))
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#endif
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#ifndef MIN
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#define MIN(m, n) ((m) < (n) ? (m) : (n))
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#endif
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#if !HAVE_DECL_POWEROF2
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#define powerof2(x) (((x) & ((x) - 1)) == 0)
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#endif
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#if !HAVE_DECL_MEMPCPY
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#define mempcpy(dest, src, n) \
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((void *) ((char *) memcpy (dest, src, n) + (size_t) n))
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#endif
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/* A special gettext function we use if the strings are too short. */
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#define sgettext(Str) \
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({ const char *__res = strrchr (gettext (Str), '|'); \
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__res ? __res + 1 : Str; })
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#define gettext_noop(Str) Str
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#ifndef TEMP_FAILURE_RETRY
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#define TEMP_FAILURE_RETRY(expression) \
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({ ssize_t __res; \
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do \
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__res = expression; \
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while (__res == -1 && errno == EINTR); \
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__res; })
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#endif
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static inline ssize_t __attribute__ ((unused))
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pwrite_retry (int fd, const void *buf, size_t len, off_t off)
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{
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ssize_t recvd = 0;
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do
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{
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ssize_t ret = TEMP_FAILURE_RETRY (pwrite (fd, buf + recvd, len - recvd,
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off + recvd));
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if (ret <= 0)
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return ret < 0 ? ret : recvd;
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recvd += ret;
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}
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while ((size_t) recvd < len);
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return recvd;
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}
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static inline ssize_t __attribute__ ((unused))
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write_retry (int fd, const void *buf, size_t len)
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{
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ssize_t recvd = 0;
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do
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{
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ssize_t ret = TEMP_FAILURE_RETRY (write (fd, buf + recvd, len - recvd));
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if (ret <= 0)
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return ret < 0 ? ret : recvd;
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recvd += ret;
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}
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while ((size_t) recvd < len);
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return recvd;
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}
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static inline ssize_t __attribute__ ((unused))
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pread_retry (int fd, void *buf, size_t len, off_t off)
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{
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ssize_t recvd = 0;
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do
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{
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ssize_t ret = TEMP_FAILURE_RETRY (pread (fd, buf + recvd, len - recvd,
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off + recvd));
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if (ret <= 0)
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return ret < 0 ? ret : recvd;
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recvd += ret;
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}
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while ((size_t) recvd < len);
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return recvd;
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}
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/* The demangler from libstdc++. */
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extern char *__cxa_demangle (const char *mangled_name, char *output_buffer,
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size_t *length, int *status);
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/* A static assertion. This will cause a compile-time error if EXPR,
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which must be a compile-time constant, is false. */
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#define eu_static_assert(expr) \
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extern int never_defined_just_used_for_checking[(expr) ? 1 : -1] \
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__attribute__ ((unused))
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#endif /* system.h */
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