/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#ifndef UTIL_H
#define UTIL_H 1
+#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#define BUILD_ASSERT_DECL BOOST_STATIC_ASSERT
#endif /* __cplusplus */
+#ifdef __GNUC__
+#define BUILD_ASSERT_GCCONLY(EXPR) BUILD_ASSERT(EXPR)
+#define BUILD_ASSERT_DECL_GCCONLY(EXPR) BUILD_ASSERT_DECL(EXPR)
+#else
+#define BUILD_ASSERT_GCCONLY(EXPR) ((void) 0)
+#define BUILD_ASSERT_DECL_GCCONLY(EXPR) ((void) 0)
+#endif
+
+/* Casts 'pointer' to 'type' and issues a compiler warning if the cast changes
+ * anything other than an outermost "const" or "volatile" qualifier.
+ *
+ * The cast to int is present only to suppress an "expression using sizeof
+ * bool" warning from "sparse" (see
+ * http://permalink.gmane.org/gmane.comp.parsers.sparse/2967). */
+#define CONST_CAST(TYPE, POINTER) \
+ ((void) sizeof ((int) ((POINTER) == (TYPE) (POINTER))), \
+ (TYPE) (POINTER))
+
extern const char *program_name;
+extern const char *subprogram_name;
/* Returns the number of elements in ARRAY. */
#define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)
/* Returns true if X is a power of 2, otherwise false. */
#define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
+static inline bool
+is_pow2(uintmax_t x)
+{
+ return IS_POW2(x);
+}
+
+/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
+ * is 0. */
+static inline uintmax_t
+rightmost_1bit(uintmax_t x)
+{
+ return x & -x;
+}
+
+/* Returns 'x' with its rightmost 1-bit changed to a zero (e.g. 01011000 =>
+ * 01010000), or 0 if 'x' is 0. */
+static inline uintmax_t
+zero_rightmost_1bit(uintmax_t x)
+{
+ return x & (x - 1);
+}
+
#ifndef MIN
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
#endif
extern "C" {
#endif
-void set_program_name(const char *);
+void set_program_name__(const char *name, const char *version,
+ const char *date, const char *time);
+#define set_program_name(name) \
+ set_program_name__(name, VERSION, __DATE__, __TIME__)
-void ovs_print_version(char *date, char *time,
- uint8_t min_ofp, uint8_t max_ofp);
-#define OVS_PRINT_VERSION(min_ofp, max_ofp) \
- ovs_print_version(__DATE__, __TIME__, (min_ofp), (max_ofp))
+const char *get_program_version(void);
+void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
void out_of_memory(void) NO_RETURN;
void *xmalloc(size_t) MALLOC_LIKE;
void ovs_abort(int err_no, const char *format, ...)
PRINTF_FORMAT(2, 3) NO_RETURN;
+void ovs_abort_valist(int err_no, const char *format, va_list)
+ PRINTF_FORMAT(2, 0) NO_RETURN;
void ovs_fatal(int err_no, const char *format, ...)
PRINTF_FORMAT(2, 3) NO_RETURN;
void ovs_fatal_valist(int err_no, const char *format, va_list)
int hexit_value(int c);
unsigned int hexits_value(const char *s, size_t n, bool *ok);
+const char *english_list_delimiter(size_t index, size_t total);
+
char *get_cwd(void);
char *dir_name(const char *file_name);
char *base_name(const char *file_name);
char *abs_file_name(const char *dir, const char *file_name);
+char *xreadlink(const char *filename);
+char *follow_symlinks(const char *filename);
+
void ignore(bool x OVS_UNUSED);
+int log_2_floor(uint32_t);
+int log_2_ceil(uint32_t);
+int ctz(uint32_t);
+int popcount(uint32_t);
+
+bool is_all_zeros(const uint8_t *, size_t);
+bool is_all_ones(const uint8_t *, size_t);
+void bitwise_copy(const void *src, unsigned int src_len, unsigned int src_ofs,
+ void *dst, unsigned int dst_len, unsigned int dst_ofs,
+ unsigned int n_bits);
+void bitwise_zero(void *dst_, unsigned int dst_len, unsigned dst_ofs,
+ unsigned int n_bits);
+void bitwise_one(void *dst_, unsigned int dst_len, unsigned dst_ofs,
+ unsigned int n_bits);
+bool bitwise_is_all_zeros(const void *, unsigned int len, unsigned int ofs,
+ unsigned int n_bits);
+void bitwise_put(uint64_t value,
+ void *dst, unsigned int dst_len, unsigned int dst_ofs,
+ unsigned int n_bits);
+uint64_t bitwise_get(const void *src, unsigned int src_len,
+ unsigned int src_ofs, unsigned int n_bits);
#ifdef __cplusplus
}