va_end(argp); \
}
-/** Version text used by various commands if -V switch was given. */
-#define VERSION_TEXT(prefix) "para_" prefix " " PACKAGE_VERSION \
- " (" GIT_VERSION ": " CODENAME ")" "\n" \
- "Copyright (C) 2011 Andre Noll\n" \
- "This is free software with ABSOLUTELY NO WARRANTY." \
- " See COPYING for details.\n" \
- "Written by Andre Noll.\n" \
- "Report bugs to <maan@systemlinux.org>.\n"
-
-/** Print out \p VERSION_TEXT and exit if version flag was given. */
-#define HANDLE_VERSION_FLAG(_prefix, _args_info_struct) \
- if (_args_info_struct.version_given) { \
- printf("%s", VERSION_TEXT(_prefix)); \
- exit(EXIT_SUCCESS); \
- }
-
/** Sent by para_client to initiate the authentication procedure. */
#define AUTH_REQUEST_MSG "auth rsa "
/** Sent by para_server for commands that expect a data file. */
return ((max + 0.0) * (random() / (RAND_MAX + 1.0)));
}
+/** Round up x to next multiple of y. */
+#define ROUND_UP(x, y) ({ \
+ const typeof(y) _divisor = y; \
+ ((x) + _divisor - 1) / _divisor * _divisor; })
+
+/** Round down x to multiple of y. */
+#define ROUND_DOWN(x, y) ({ \
+ const typeof(y) _divisor = y; \
+ (x) / _divisor * _divisor; })
+
/** Divide and round up to next integer. */
#define DIV_ROUND_UP(x, y) ({ \
typeof(y) _divisor = y; \
((x) + _divisor - 1) / _divisor; })
+/**
+ * Assert a build-time dependency, as an expression.
+ *
+ * \param cond The compile-time condition which must be true.
+ *
+ * Compilation will fail if the condition isn't true, or can't be evaluated by
+ * the compiler. This can be used in an expression: its value is "0".
+ *
+ * Taken from ccan.
+ */
+#define EXPR_BUILD_ASSERT(cond) (sizeof(char [1 - 2 * !(cond)]) - 1)
+
+/* &a[0] degrades to a pointer: a different type from an array */
+#define _array_size_chk(arr) EXPR_BUILD_ASSERT(\
+ !__builtin_types_compatible_p(typeof(arr), typeof(&(arr)[0])))
/** Get the size of an array */
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + _array_size_chk(arr))
/**
* Wrapper for isspace.
/** Used to avoid a shortcoming in vim's syntax highlighting. */
#define EMBRACE(...) { __VA_ARGS__}
+/** A nice cup of STFU for Mr gcc. */
+#define do_nothing do {/* nothing */} while (0)
+
/**
* The sample formats supported by paraslash.
*