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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/c.h
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to 'libblkid/c.h')
-rw-r--r--libblkid/c.h280
1 files changed, 280 insertions, 0 deletions
diff --git a/libblkid/c.h b/libblkid/c.h
new file mode 100644
index 000000000..037a09928
--- /dev/null
+++ b/libblkid/c.h
@@ -0,0 +1,280 @@
+/*
+ * Fundamental C definitions.
+ */
+
+#ifndef UTIL_LINUX_C_H
+#define UTIL_LINUX_C_H
+
+#include <limits.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "blkid.h"
+#ifdef HAVE_ERR_H
+# include <err.h>
+#endif
+
+#ifndef HAVE_USLEEP
+# include <time.h>
+#endif
+
+/*
+ * Compiler specific stuff
+ */
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+# define __GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+# define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+#ifdef __GNUC__
+
+/* &a[0] degrades to a pointer: a different type from an array */
+# define __must_be_array(a) \
+ UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
+
+# define ignore_result(x) ({ \
+ __typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
+})
+
+#else /* !__GNUC__ */
+# define __must_be_array(a) 0
+# define __attribute__(_arg_)
+# define ignore_result(x) ((void) (x))
+#endif /* !__GNUC__ */
+
+/*
+ * Function attributes
+ */
+#ifndef __ul_alloc_size
+# if __GNUC_PREREQ (4, 3)
+# define __ul_alloc_size(s) __attribute__((alloc_size(s)))
+# else
+# define __ul_alloc_size(s)
+# endif
+#endif
+
+#ifndef __ul_calloc_size
+# if __GNUC_PREREQ (4, 3)
+# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s)))
+# else
+# define __ul_calloc_size(n, s)
+# endif
+#endif
+
+/* Force a compilation error if condition is true, but also produce a
+ * result (of value 0 and type size_t), so the expression can be used
+ * e.g. in a structure initializer (or where-ever else comma expressions
+ * aren't permitted).
+ */
+#define UL_BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
+#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
+#endif
+
+#ifndef PATH_MAX
+# define PATH_MAX 4096
+#endif
+
+#ifndef TRUE
+# define TRUE 1
+#endif
+
+#ifndef FALSE
+# define FALSE 0
+#endif
+
+#ifndef min
+# define min(x, y) ({ \
+ __typeof__(x) _min1 = (x); \
+ __typeof__(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+#endif
+
+#ifndef max
+# define max(x, y) ({ \
+ __typeof__(x) _max1 = (x); \
+ __typeof__(y) _max2 = (y); \
+ (void) (&_max1 == &_max2); \
+ _max1 > _max2 ? _max1 : _max2; })
+#endif
+
+#ifndef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({ \
+ const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+#endif
+
+#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+# ifdef HAVE___PROGNAME
+extern char *__progname;
+# define program_invocation_short_name __progname
+# else
+# ifdef HAVE_GETEXECNAME
+# define program_invocation_short_name \
+ prog_inv_sh_nm_from_file(getexecname(), 0)
+# else
+# define program_invocation_short_name \
+ prog_inv_sh_nm_from_file(__FILE__, 1)
+# endif
+static char prog_inv_sh_nm_buf[256];
+static inline char *
+prog_inv_sh_nm_from_file(char *f, char stripext)
+{
+ char *t;
+
+ if ((t = strrchr(f, '/')) != NULL)
+ t++;
+ else
+ t = f;
+
+ strncpy(prog_inv_sh_nm_buf, t, sizeof(prog_inv_sh_nm_buf) - 1);
+ prog_inv_sh_nm_buf[sizeof(prog_inv_sh_nm_buf) - 1] = '\0';
+
+ if (stripext && (t = strrchr(prog_inv_sh_nm_buf, '.')) != NULL)
+ *t = '\0';
+
+ return prog_inv_sh_nm_buf;
+}
+# endif
+#endif
+
+
+#ifndef HAVE_ERR_H
+static inline void
+errmsg(char doexit, int excode, char adderr, const char *fmt, ...)
+{
+ fprintf(stderr, "%s: ", program_invocation_short_name);
+ if (fmt != NULL) {
+ va_list argp;
+ va_start(argp, fmt);
+ vfprintf(stderr, fmt, argp);
+ va_end(argp);
+ if (adderr)
+ fprintf(stderr, ": ");
+ }
+ if (adderr)
+ fprintf(stderr, "%m");
+ fprintf(stderr, "\n");
+ if (doexit)
+ exit(excode);
+}
+
+#ifndef HAVE_ERR
+# define err(E, FMT...) errmsg(1, E, 1, FMT)
+#endif
+
+#ifndef HAVE_ERRX
+# define errx(E, FMT...) errmsg(1, E, 0, FMT)
+#endif
+
+#ifndef HAVE_WARN
+# define warn(FMT...) errmsg(0, 0, 1, FMT)
+#endif
+
+#ifndef HAVE_WARNX
+# define warnx(FMT...) errmsg(0, 0, 0, FMT)
+#endif
+#endif /* !HAVE_ERR_H */
+
+
+static inline __attribute__((const)) int is_power_of_2(unsigned long num)
+{
+ return (num != 0 && ((num & (num - 1)) == 0));
+}
+
+#ifndef HAVE_LOFF_T
+typedef int64_t loff_t;
+#endif
+
+#if !defined(HAVE_DIRFD) && (!defined(HAVE_DECL_DIRFD) || HAVE_DECL_DIRFD == 0) && defined(HAVE_DIR_DD_FD)
+#include <sys/types.h>
+#include <dirent.h>
+static inline int dirfd(DIR *d)
+{
+ return d->dd_fd;
+}
+#endif
+
+/*
+ * Fallback defines for old versions of glibc
+ */
+#include <fcntl.h>
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#endif
+
+#ifndef AI_ADDRCONFIG
+#define AI_ADDRCONFIG 0x0020
+#endif
+
+#ifndef IUTF8
+#define IUTF8 0040000
+#endif
+
+/*
+ * MAXHOSTNAMELEN replacement
+ */
+static inline size_t get_hostname_max(void)
+{
+ long len = sysconf(_SC_HOST_NAME_MAX);
+
+ if (0 < len)
+ return len;
+
+#ifdef MAXHOSTNAMELEN
+ return MAXHOSTNAMELEN;
+#elif HOST_NAME_MAX
+ return HOST_NAME_MAX;
+#endif
+ return 64;
+}
+
+/*
+ * Constant strings for usage() functions. For more info see
+ * Documentation/howto-usage-function.txt and sys-utils/arch.c
+ */
+#define USAGE_HEADER _("\nUsage:\n")
+#define USAGE_OPTIONS _("\nOptions:\n")
+#define USAGE_SEPARATOR _("\n")
+#define USAGE_HELP _(" -h, --help display this help and exit\n")
+#define USAGE_VERSION _(" -V, --version output version information and exit\n")
+#define USAGE_MAN_TAIL(_man) _("\nFor more details see %s.\n"), _man
+
+#define UTIL_LINUX_VERSION _("%s from %s\n"), program_invocation_short_name, PACKAGE_STRING
+
+/*
+ * scanf modifiers for "strings allocation"
+ */
+#ifdef HAVE_SCANF_MS_MODIFIER
+#define UL_SCNsA "%ms"
+#elif defined(HAVE_SCANF_AS_MODIFIER)
+#define UL_SCNsA "%as"
+#endif
+
+/*
+ * seek stuff
+ */
+#ifndef SEEK_DATA
+# define SEEK_DATA 3
+#endif
+#ifndef SEEK_HOLE
+# define SEEK_HOLE 4
+#endif
+
+#endif /* UTIL_LINUX_C_H */