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Diffstat (limited to 'src/config.h')
| -rw-r--r-- | src/config.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/config.h b/src/config.h new file mode 100644 index 0000000..5bd49de --- /dev/null +++ b/src/config.h @@ -0,0 +1,189 @@ +/**************************************************************************** + * bfs * + * Copyright (C) 2015-2022 Tavian Barnes <tavianator@tavianator.com> * + * * + * Permission to use, copy, modify, and/or distribute this software for any * + * purpose with or without fee is hereby granted. * + * * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * + ****************************************************************************/ + +/** + * Configuration and feature/platform detection. + */ + +#ifndef BFS_CONFIG_H +#define BFS_CONFIG_H + +#include <stdbool.h> +#include <stddef.h> + +// bfs packaging configuration + +#ifndef BFS_COMMAND +# define BFS_COMMAND "bfs" +#endif +#ifndef BFS_VERSION +# define BFS_VERSION "2.6.2" +#endif +#ifndef BFS_HOMEPAGE +# define BFS_HOMEPAGE "https://tavianator.com/projects/bfs.html" +#endif + +// Check for system headers + +#ifdef __has_include + +#if __has_include(<mntent.h>) +# define BFS_HAS_MNTENT_H true +#endif +#if __has_include(<paths.h>) +# define BFS_HAS_PATHS_H true +#endif +#if __has_include(<sys/acl.h>) +# define BFS_HAS_SYS_ACL_H true +#endif +#if __has_include(<sys/capability.h>) +# define BFS_HAS_SYS_CAPABILITY_H true +#endif +#if __has_include(<sys/extattr.h>) +# define BFS_HAS_SYS_EXTATTR_H true +#endif +#if __has_include(<sys/mkdev.h>) +# define BFS_HAS_SYS_MKDEV_H true +#endif +#if __has_include(<sys/param.h>) +# define BFS_HAS_SYS_PARAM_H true +#endif +#if __has_include(<sys/sysmacros.h>) +# define BFS_HAS_SYS_SYSMACROS_H true +#endif +#if __has_include(<sys/xattr.h>) +# define BFS_HAS_SYS_XATTR_H true +#endif +#if __has_include(<util.h>) +# define BFS_HAS_UTIL_H true +#endif + +#else // !__has_include + +#define BFS_HAS_MNTENT_H __GLIBC__ +#define BFS_HAS_PATHS_H true +#define BFS_HAS_SYS_ACL_H true +#define BFS_HAS_SYS_CAPABILITY_H __linux__ +#define BFS_HAS_SYS_EXTATTR_H __FreeBSD__ +#define BFS_HAS_SYS_MKDEV_H false +#define BFS_HAS_SYS_PARAM_H true +#define BFS_HAS_SYS_SYSMACROS_H __GLIBC__ +#define BFS_HAS_SYS_XATTR_H __linux__ +#define BFS_HAS_UTIL_H __NetBSD__ + +#endif // !__has_include + +#ifndef BFS_USE_MNTENT_H +# define BFS_USE_MNTENT_H BFS_HAS_MNTENT_H +#endif +#ifndef BFS_USE_PATHS_H +# define BFS_USE_PATHS_H BFS_HAS_PATHS_H +#endif +#ifndef BFS_USE_SYS_ACL_H +# define BFS_USE_SYS_ACL_H BFS_HAS_SYS_ACL_H +#endif +#ifndef BFS_USE_SYS_CAPABILITY_H +# define BFS_USE_SYS_CAPABILITY_H BFS_HAS_SYS_CAPABILITY_H +#endif +#ifndef BFS_USE_SYS_EXTATTR_H +# define BFS_USE_SYS_EXTATTR_H BFS_HAS_SYS_EXTATTR_H +#endif +#ifndef BFS_USE_SYS_MKDEV_H +# define BFS_USE_SYS_MKDEV_H BFS_HAS_SYS_MKDEV_H +#endif +#ifndef BFS_USE_SYS_PARAM_H +# define BFS_USE_SYS_PARAM_H BFS_HAS_SYS_PARAM_H +#endif +#ifndef BFS_USE_SYS_SYSMACROS_H +# define BFS_USE_SYS_SYSMACROS_H BFS_HAS_SYS_SYSMACROS_H +#endif +#ifndef BFS_USE_SYS_XATTR_H +# define BFS_USE_SYS_XATTR_H BFS_HAS_SYS_XATTR_H +#endif +#ifndef BFS_USE_UTIL_H +# define BFS_USE_UTIL_H BFS_HAS_UTIL_H +#endif + +// Stub out feature detection on old/incompatible compilers + +#ifndef __has_feature +# define __has_feature(feat) false +#endif + +#ifndef __has_c_attribute +# define __has_c_attribute(attr) false +#endif + +#ifndef __has_attribute +# define __has_attribute(attr) false +#endif + +// Platform detection + +// Get the definition of BSD if available +#if BFS_USE_SYS_PARAM_H +# include <sys/param.h> +#endif + +#ifndef __GLIBC_PREREQ +# define __GLIBC_PREREQ(maj, min) false +#endif + +// Wrappers for fundamental language features/extensions + +/** + * Silence compiler warnings about switch/case fall-throughs. + */ +#if __has_c_attribute(fallthrough) +# define BFS_FALLTHROUGH [[fallthrough]] +#elif __has_attribute(fallthrough) +# define BFS_FALLTHROUGH __attribute__((fallthrough)) +#else +# define BFS_FALLTHROUGH ((void)0) +#endif + +// Lower bound on BFS_FLEX_SIZEOF() +#define BFS_FLEX_LB(type, member, length) (offsetof(type, member) + sizeof(((type *)NULL)->member[0]) * (length)) + +// Maximum macro for BFS_FLEX_SIZE() +#define BFS_FLEX_MAX(a, b) ((a) > (b) ? (a) : (b)) + +/** + * Computes the size of a struct containing a flexible array member of the given + * length. + * + * @param type + * The type of the struct containing the flexible array. + * @param member + * The name of the flexible array member. + * @param length + * The length of the flexible array. + */ +#define BFS_FLEX_SIZEOF(type, member, length) \ + (sizeof(type) <= BFS_FLEX_LB(type, member, 0) \ + ? BFS_FLEX_LB(type, member, length) \ + : BFS_FLEX_MAX(sizeof(type), BFS_FLEX_LB(type, member, length))) + +/** + * Adds compiler warnings for bad printf()-style function calls, if supported. + */ +#if __has_attribute(format) +# define BFS_FORMATTER(fmt, args) __attribute__((format(printf, fmt, args))) +#else +# define BFS_FORMATTER(fmt, args) +#endif + +#endif // BFS_CONFIG_H |