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Diffstat (limited to 'lib/compat/compat.h')
| -rw-r--r-- | lib/compat/compat.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/lib/compat/compat.h b/lib/compat/compat.h new file mode 100644 index 0000000..5bad7a3 --- /dev/null +++ b/lib/compat/compat.h @@ -0,0 +1,203 @@ +/* + * libcompat - system compatibility library + * compat.h - system compatibility declarations + * + * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk> + * Copyright © 2008, 2009 Guillem Jover <guillem@debian.org> + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef COMPAT_H +#define COMPAT_H + +#ifndef TEST_LIBCOMPAT +#define TEST_LIBCOMPAT 0 +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRNLEN) || !defined(HAVE_STRNDUP) || \ + !defined(HAVE_C99_SNPRINTF) +#include <stddef.h> +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_ASPRINTF) || !defined(HAVE_C99_SNPRINTF) +#include <stdarg.h> +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_VA_COPY) +#include <string.h> +#endif + +/* Language definitions. */ + +/* Supported since gcc 5.1.0 and clang 2.9.0. For attributes that appeared + * before these versions, in addition we need to do version checks. */ +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifdef __GNUC__ +#define LIBCOMPAT_GCC_VERSION (__GNUC__ << 8 | __GNUC_MINOR__) +#else +#define LIBCOMPAT_GCC_VERSION 0 +#endif + +#if LIBCOMPAT_GCC_VERSION >= 0x0300 || __has_attribute(__format__) +#define LIBCOMPAT_ATTR_FMT(t, f, a) __attribute__((__format__(t, f, a))) +#define LIBCOMPAT_ATTR_PRINTF(n) LIBCOMPAT_ATTR_FMT(__printf__, n, n + 1) +#define LIBCOMPAT_ATTR_VPRINTF(n) LIBCOMPAT_ATTR_FMT(__printf__, n, 0) +#else +#define LIBCOMPAT_ATTR_FMT(t, f, a) +#define LIBCOMPAT_ATTR_PRINTF(n) +#define LIBCOMPAT_ATTR_VPRINTF(n) +#endif + +#if LIBCOMPAT_GCC_VERSION >= 0x0300 || __has_attribute(__noreturn__) +#define LIBCOMPAT_ATTR_NORET __attribute__((__noreturn__)) +#else +#define LIBCOMPAT_ATTR_NORET +#endif + +#if LIBCOMPAT_GCC_VERSION >= 0x0400 || __has_attribute(__sentinel__) +#define LIBCOMPAT_ATTR_SENTINEL __attribute__((__sentinel__)) +#else +#define LIBCOMPAT_ATTR_SENTINEL +#endif + +/* For C++, define a __func__ fallback in case it's not natively supported. */ +#if defined(__cplusplus) && __cplusplus < 201103L +# if LIBCOMPAT_GCC_VERSION >= 0x0200 +# define __func__ __PRETTY_FUNCTION__ +# else +# define __func__ __FUNCTION__ +# endif +#endif + +#if defined(__cplusplus) && __cplusplus < 201103L +#define nullptr 0 +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef HAVE_OFFSETOF +#define offsetof(st, m) ((size_t)&((st *)NULL)->m) +#endif + +#ifndef HAVE_MAKEDEV +#define makedev(maj, min) ((((maj) & 0xff) << 8) | ((min) & 0xff)) +#endif + +#ifndef HAVE_O_NOFOLLOW +#define O_NOFOLLOW 0 +#endif + +#ifndef HAVE_P_TMPDIR +#define P_tmpdir "/tmp" +#endif + +/* + * Define WCOREDUMP if we don't have it already, coredumps won't be + * detected, though. + */ +#ifndef HAVE_WCOREDUMP +#define WCOREDUMP(x) 0 +#endif + +#ifndef HAVE_VA_COPY +#define va_copy(dest, src) memcpy(&(dest), &(src), sizeof(va_list)) +#endif + +#if TEST_LIBCOMPAT +#undef snprintf +#define snprintf test_snprintf +#undef vsnprintf +#define vsnprintf test_vsnprintf +#undef asprintf +#define asprintf test_asprintf +#undef vasprintf +#define vasprintf test_vasprintf +#undef strchrnul +#define strchrnul test_strchrnul +#undef strndup +#define strndup test_strndup +#undef strnlen +#define strnlen test_strnlen +#undef strerror +#define strerror test_strerror +#undef strsignal +#define strsignal test_strsignal +#undef scandir +#define scandir test_scandir +#undef alphasort +#define alphasort test_alphasort +#undef unsetenv +#define unsetenv test_unsetenv +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_C99_SNPRINTF) +int snprintf(char *str, size_t n, char const *fmt, ...) + LIBCOMPAT_ATTR_PRINTF(3); +int vsnprintf(char *buf, size_t maxsize, const char *fmt, va_list args) + LIBCOMPAT_ATTR_VPRINTF(3); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_ASPRINTF) +int asprintf(char **str, char const *fmt, ...) + LIBCOMPAT_ATTR_PRINTF(2); +int vasprintf(char **str, const char *fmt, va_list args) + LIBCOMPAT_ATTR_VPRINTF(2); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRCHRNUL) +char *strchrnul(const char *s, int c); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRNLEN) +size_t strnlen(const char *s, size_t n); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRNDUP) +char *strndup(const char *s, size_t n); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRERROR) +const char *strerror(int); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_STRSIGNAL) +const char *strsignal(int); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_SCANDIR) +struct dirent; +int scandir(const char *dir, struct dirent ***namelist, + int (*filter)(const struct dirent *), + int (*cmp)(const void *, const void *)); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_ALPHASORT) +int alphasort(const void *a, const void *b); +#endif + +#if TEST_LIBCOMPAT || !defined(HAVE_UNSETENV) +int unsetenv(const char *x); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* COMPAT_H */ |