/*
This file is part of GNUnet.
- (C) 2006, 2009 Christian Grothoff (and other contributing authors)
+ (C) 2006-2013 Christian Grothoff (and other contributing authors)
GNUnet 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, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
*
* @author Christian Grothoff
* @author Nils Durner
+ *
+ * @defgroup logging Logging
+ * @defgroup memory Memory management
*/
#ifndef GNUNET_COMMON_H
#define GNUNET_COMMON_H
#include <stdarg.h>
#endif
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
/**
* Version of the API (for entire gnunetutil.so library).
*/
-#define GNUNET_UTIL_VERSION 0x00090100
+#define GNUNET_UTIL_VERSION 0x00090501
/**
* Named constants for return values. The following
#define GNUNET_MAX(a,b) (((a) > (b)) ? (a) : (b))
+/* some systems use one underscore only, and mingw uses no underscore... */
+#ifndef __BYTE_ORDER
+#ifdef _BYTE_ORDER
+#define __BYTE_ORDER _BYTE_ORDER
+#else
+#ifdef BYTE_ORDER
+#define __BYTE_ORDER BYTE_ORDER
+#endif
+#endif
+#endif
+#ifndef __BIG_ENDIAN
+#ifdef _BIG_ENDIAN
+#define __BIG_ENDIAN _BIG_ENDIAN
+#else
+#ifdef BIG_ENDIAN
+#define __BIG_ENDIAN BIG_ENDIAN
+#endif
+#endif
+#endif
+#ifndef __LITTLE_ENDIAN
+#ifdef _LITTLE_ENDIAN
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#else
+#ifdef LITTLE_ENDIAN
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#endif
+#endif
+#endif
+
+/**
+ * @ingroup logging
+ * define GNUNET_EXTRA_LOGGING if using this header outside the GNUnet source
+ * tree where gnunet_config.h is unavailable
+ */
+#ifndef GNUNET_EXTRA_LOGGING
+#define GNUNET_EXTRA_LOGGING 0
+#endif
+
/**
* Endian operations
*/
*/
#define GNUNET_PACKED __attribute__((packed))
+/**
+ * gcc-ism to get gcc bitfield layout when compiling with -mms-bitfields
+ */
+#if MINGW
+#define GNUNET_GCC_STRUCT_LAYOUT __attribute__((gcc_struct))
+#else
+#define GNUNET_GCC_STRUCT_LAYOUT
+#endif
+
+/**
+ * gcc-ism to force alignment; we use this to align char-arrays
+ * that may then be cast to 'struct's. See also gcc
+ * bug #33594.
+ */
+#ifdef __BIGGEST_ALIGNMENT__
+#define GNUNET_ALIGN __attribute__((aligned (__BIGGEST_ALIGNMENT__)))
+#else
+#define GNUNET_ALIGN __attribute__((aligned (8)))
+#endif
+
/**
* gcc-ism to document unused arguments
*/
#define GNUNET_UNUSED __attribute__((unused))
+/**
+ * gcc-ism to document functions that don't return
+ */
+#define GNUNET_NORETURN __attribute__((noreturn))
+
+#if MINGW
#if __GNUC__ > 3
/**
- * gcc 4.x-ism to pack structures even on W32 (to be used before structs)
+ * gcc 4.x-ism to pack structures even on W32 (to be used before structs);
+ * Using this would cause structs to be unaligned on the stack on Sparc,
+ * so we *only* use this on W32 (see #670578 from Debian); fortunately,
+ * W32 doesn't run on sparc anyway.
*/
#define GNUNET_NETWORK_STRUCT_BEGIN \
_Pragma("pack(push)") \
/**
* gcc 4.x-ism to pack structures even on W32 (to be used after structs)
+ * Using this would cause structs to be unaligned on the stack on Sparc,
+ * so we *only* use this on W32 (see #670578 from Debian); fortunately,
+ * W32 doesn't run on sparc anyway.
*/
#define GNUNET_NETWORK_STRUCT_END _Pragma("pack(pop)")
+
#else
-#ifdef MINGW
#error gcc 4.x or higher required on W32 systems
#endif
+#else
/**
- * Good luck, GNUNET_PACKED should suffice, but this won't work on W32
+ * Define as empty, GNUNET_PACKED should suffice, but this won't work on W32
*/
-#define GNUNET_NETWORK_STRUCT_BEGIN
+#define GNUNET_NETWORK_STRUCT_BEGIN
/**
- * Good luck, GNUNET_PACKED should suffice, but this won't work on W32
+ * Define as empty, GNUNET_PACKED should suffice, but this won't work on W32;
*/
#define GNUNET_NETWORK_STRUCT_END
#endif
uint16_t type GNUNET_PACKED;
};
-GNUNET_NETWORK_STRUCT_END
-
-/**
- * @brief 512-bit hashcode
- */
-typedef struct
-{
- uint32_t bits[512 / 8 / sizeof (uint32_t)]; /* = 16 */
-}
-GNUNET_HashCode;
-
-GNUNET_NETWORK_STRUCT_BEGIN
-
-/**
- * The identity of the host (basically the SHA-512 hashcode of
- * it's public key).
- */
-struct GNUNET_PeerIdentity
-{
- GNUNET_HashCode hashPubKey GNUNET_PACKED;
-};
GNUNET_NETWORK_STRUCT_END
/**
*
* @param cls closure
* @param filename complete filename (absolute path)
- * @return GNUNET_OK to continue to iterate,
- * GNUNET_SYSERR to abort iteration with error!
+ * @return #GNUNET_OK to continue to iterate,
+ * #GNUNET_NO to stop iteration with no error,
+ * #GNUNET_SYSERR to abort iteration with error!
*/
typedef int (*GNUNET_FileNameCallback) (void *cls, const char *filename);
/* ****************************** logging ***************************** */
/**
+ * @ingroup logging
* Types of errors.
*/
enum GNUNET_ErrorType
/**
+ * @ingroup logging
* User-defined handler for log messages.
*
* @param cls closure
/**
- * Number of log calls to ignore.
+ * @ingroup logging
+ * Get the number of log calls that are going to be skipped
+ *
+ * @return number of log calls to be ignored
*/
-extern unsigned int skip_log;
+int
+GNUNET_get_log_skip ();
#if !defined(GNUNET_CULL_LOGGING)
int
-GNUNET_get_log_call_status (int caller_level, const char *comp,
- const char *file, const char *function, int line);
+GNUNET_get_log_call_status (int caller_level,
+ const char *comp,
+ const char *file,
+ const char *function, int line);
#endif
+
+
/**
+ * @ingroup logging
* Main log function.
*
* @param kind how serious is the error?
#define GNUNET_LOG_CALL_STATUS -1
#endif
+
/**
+ * @ingroup logging
* Log function that specifies an alternative component.
* This function should be used by plugins.
*
#if !defined(GNUNET_CULL_LOGGING)
#define GNUNET_log_from(kind,comp,...) do { int log_line = __LINE__;\
static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
- if (GN_UNLIKELY(log_call_enabled == -1))\
- log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), comp, __FILE__, __FUNCTION__, log_line);\
- if (GN_UNLIKELY(skip_log > 0)) {skip_log--;}\
- else {\
- if (GN_UNLIKELY(log_call_enabled))\
- GNUNET_log_from_nocheck (kind, comp, __VA_ARGS__);\
+ if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
+ if (GN_UNLIKELY(log_call_enabled == -1))\
+ log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), (comp), __FILE__, __FUNCTION__, log_line); \
+ if (GN_UNLIKELY(GNUNET_get_log_skip () > 0)) { GNUNET_log_skip (-1, GNUNET_NO); }\
+ else {\
+ if (GN_UNLIKELY(log_call_enabled))\
+ GNUNET_log_from_nocheck ((kind), comp, __VA_ARGS__); \
+ }\
}\
} while (0)
#define GNUNET_log(kind,...) do { int log_line = __LINE__;\
static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
- if (GN_UNLIKELY(log_call_enabled == -1))\
- log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), NULL, __FILE__, __FUNCTION__, log_line);\
- if (GN_UNLIKELY(skip_log > 0)) {skip_log--;}\
- else {\
- if (GN_UNLIKELY(log_call_enabled))\
- GNUNET_log_nocheck (kind, __VA_ARGS__);\
+ if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
+ if (GN_UNLIKELY(log_call_enabled == -1))\
+ log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), NULL, __FILE__, __FUNCTION__, log_line);\
+ if (GN_UNLIKELY(GNUNET_get_log_skip () > 0)) { GNUNET_log_skip (-1, GNUNET_NO); }\
+ else {\
+ if (GN_UNLIKELY(log_call_enabled))\
+ GNUNET_log_nocheck ((kind), __VA_ARGS__); \
+ }\
}\
} while (0)
#else
/**
+ * @ingroup logging
+ * Log error message about missing configuration option.
+ *
+ * @param kind log level
+ * @param section section with missing option
+ * @param option name of missing option
+ */
+void
+GNUNET_log_config_missing (enum GNUNET_ErrorType kind,
+ const char *section,
+ const char *option);
+
+
+/**
+ * @ingroup logging
+ * Log error message about invalid configuration option value.
+ *
+ * @param kind log level
+ * @param section section with invalid option
+ * @param option name of invalid option
+ * @param required what is required that is invalid about the option
+ */
+void
+GNUNET_log_config_invalid (enum GNUNET_ErrorType kind,
+ const char *section,
+ const char *option,
+ const char *required);
+
+
+/**
+ * @ingroup logging
* Abort the process, generate a core dump if possible.
*/
void
-GNUNET_abort (void);
+GNUNET_abort (void) GNUNET_NORETURN;
+
/**
- * Ignore the next n calls to the log function.
+ * @ingroup logging
+ * Ignore the next @a n calls to the log function.
*
- * @param n number of log calls to ignore
+ * @param n number of log calls to ignore (could be negative)
* @param check_reset GNUNET_YES to assert that the log skip counter is currently zero
*/
void
-GNUNET_log_skip (unsigned int n, int check_reset);
+GNUNET_log_skip (int n, int check_reset);
/**
+ * @ingroup logging
* Setup logging.
*
* @param comp default component to use
* @param loglevel what types of messages should be logged
* @param logfile change logging to logfile (use NULL to keep stderr)
- * @return GNUNET_OK on success, GNUNET_SYSERR if logfile could not be opened
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if logfile could not be opened
*/
int
GNUNET_log_setup (const char *comp, const char *loglevel, const char *logfile);
/**
+ * @ingroup logging
* Add a custom logger.
*
* @param logger log function
- * @param logger_cls closure for logger
+ * @param logger_cls closure for @a logger
*/
void
GNUNET_logger_add (GNUNET_Logger logger, void *logger_cls);
/**
+ * @ingroup logging
* Remove a custom logger.
*
* @param logger log function
/**
+ * @ingroup logging
* Convert a hash value to a string (for printing debug messages).
* This is one of the very few calls in the entire API that is
* NOT reentrant!
* @return string
*/
const char *
-GNUNET_h2s (const GNUNET_HashCode * hc);
+GNUNET_h2s (const struct GNUNET_HashCode * hc);
/**
+ * @ingroup logging
* Convert a hash value to a string (for printing debug messages).
* This prints all 104 characters of a hashcode!
* This is one of the very few calls in the entire API that is
* @return string
*/
const char *
-GNUNET_h2s_full (const GNUNET_HashCode * hc);
+GNUNET_h2s_full (const struct GNUNET_HashCode * hc);
/**
+ * @ingroup logging
* Convert a peer identity to a string (for printing debug messages).
* This is one of the very few calls in the entire API that is
* NOT reentrant!
*
* @param pid the peer identity
* @return string form of the pid; will be overwritten by next
- * call to GNUNET_i2s.
+ * call to #GNUNET_i2s.
*/
const char *
GNUNET_i2s (const struct GNUNET_PeerIdentity *pid);
/**
+ * @ingroup logging
+ * Convert a peer identity to a string (for printing debug messages).
+ * This is one of the very few calls in the entire API that is
+ * NOT reentrant!
+ *
+ * @param pid the peer identity
+ * @return string form of the pid; will be overwritten by next
+ * call to #GNUNET_i2s.
+ */
+const char *
+GNUNET_i2s_full (const struct GNUNET_PeerIdentity *pid);
+
+
+/**
+ * @ingroup logging
* Convert a "struct sockaddr*" (IPv4 or IPv6 address) to a string
* (for printing debug messages). This is one of the very few calls
* in the entire API that is NOT reentrant!
const char *
GNUNET_a2s (const struct sockaddr *addr, socklen_t addrlen);
+
/**
+ * @ingroup logging
* Convert error type to string.
*
* @param kind type to convert
/**
+ * @ingroup logging
* Use this for fatal errors that cannot be handled
*/
#define GNUNET_assert(cond) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Assertion failed at %s:%d.\n"), __FILE__, __LINE__); GNUNET_abort(); } } while(0)
+
/**
+ * @ingroup logging
* Use this for fatal errors that cannot be handled
*/
#define GNUNET_assert_at(cond, f, l) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Assertion failed at %s:%d.\n"), f, l); GNUNET_abort(); } } while(0)
+
/**
+ * @ingroup logging
* Use this for internal assertion violations that are
* not fatal (can be handled) but should not occur.
*/
#define GNUNET_break(cond) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Assertion failed at %s:%d.\n"), __FILE__, __LINE__); } } while(0)
+
/**
+ * @ingroup logging
* Use this for assertion violations caused by other
* peers (i.e. protocol violations). We do not want to
* confuse end-users (say, some other peer runs an
*/
#define GNUNET_break_op(cond) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, _("External protocol violation detected at %s:%d.\n"), __FILE__, __LINE__); } } while(0)
+
/**
+ * @ingroup logging
* Log an error message at log-level 'level' that indicates
* a failure of the command 'cmd' with the message given
* by strerror(errno).
*/
#define GNUNET_log_strerror(level, cmd) do { GNUNET_log(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, STRERROR(errno)); } while(0)
+
/**
+ * @ingroup logging
* Log an error message at log-level 'level' that indicates
* a failure of the command 'cmd' with the message given
* by strerror(errno).
*/
#define GNUNET_log_from_strerror(level, component, cmd) do { GNUNET_log_from (level, component, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, STRERROR(errno)); } while(0)
+
/**
+ * @ingroup logging
* Log an error message at log-level 'level' that indicates
* a failure of the command 'cmd' with the message given
* by strerror(errno).
*/
#define GNUNET_log_strerror_file(level, cmd, filename) do { GNUNET_log(level, _("`%s' failed on file `%s' at %s:%d with error: %s\n"), cmd, filename,__FILE__, __LINE__, STRERROR(errno)); } while(0)
+
/**
+ * @ingroup logging
* Log an error message at log-level 'level' that indicates
* a failure of the command 'cmd' with the message given
* by strerror(errno).
uint64_t
GNUNET_htonll (uint64_t n);
+/**
+ * Convert double to network-byte-order.
+ * @param d the value in network byte order
+ * @return the same value in host byte order
+ */
+double
+GNUNET_hton_double (double d);
+
+/**
+ * Convert double to host-byte-order
+ * @param d the value in network byte order
+ * @return the same value in host byte order
+ */
+double
+GNUNET_ntoh_double (double d);
/* ************************* allocation functions ****************** */
/**
+ * @ingroup memory
* Maximum allocation with GNUNET_malloc macro.
*/
#define GNUNET_MAX_MALLOC_CHECKED (1024 * 1024 * 40)
/**
+ * @ingroup memory
+ * Allocate a struct or union of the given @a type.
+ * Wrapper around #GNUNET_malloc that returns a pointer
+ * to the newly created object of the correct type.
+ *
+ * @param type name of the struct or union, i.e. pass 'struct Foo'.
+ */
+#define GNUNET_new(type) (type *) GNUNET_malloc (sizeof (type))
+
+/**
+ * @ingroup memory
* Wrapper around malloc. Allocates size bytes of memory.
* The memory will be zero'ed out.
*
#define GNUNET_malloc(size) GNUNET_xmalloc_(size, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Allocate and initialize a block of memory.
*
* @param buf data to initalize the block with
#define GNUNET_memdup(buf,size) GNUNET_xmemdup_(buf, size, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Wrapper around malloc. Allocates size bytes of memory.
* The memory will be zero'ed out.
*
#define GNUNET_malloc_large(size) GNUNET_xmalloc_unchecked_(size, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Wrapper around realloc. Rellocates size bytes of memory.
*
* @param ptr the pointer to reallocate
#define GNUNET_realloc(ptr, size) GNUNET_xrealloc_(ptr, size, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Wrapper around free. Frees the memory referred to by ptr.
* Note that is is generally better to free memory that was
- * allocated with GNUNET_array_grow using GNUNET_array_grow(mem, size, 0) instead of GNUNET_free.
+ * allocated with #GNUNET_array_grow using #GNUNET_array_grow(mem, size, 0) instead of #GNUNET_free.
*
* @param ptr location where to free the memory. ptr must have
- * been returned by GNUNET_strdup, GNUNET_strndup, GNUNET_malloc or GNUNET_array_grow earlier.
+ * been returned by #GNUNET_strdup, #GNUNET_strndup, #GNUNET_malloc or #GNUNET_array_grow earlier.
*/
#define GNUNET_free(ptr) GNUNET_xfree_(ptr, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Free the memory pointed to by ptr if ptr is not NULL.
- * Equivalent to if (ptr!=null)GNUNET_free(ptr).
+ * Equivalent to `if (NULL != ptr) GNUNET_free(ptr)`.
*
* @param ptr the location in memory to free
*/
#define GNUNET_free_non_null(ptr) do { void * __x__ = ptr; if (__x__ != NULL) { GNUNET_free(__x__); } } while(0)
/**
- * Wrapper around GNUNET_strdup. Makes a copy of the zero-terminated string
+ * @ingroup memory
+ * Wrapper around #GNUNET_xstrdup_. Makes a copy of the zero-terminated string
* pointed to by a.
*
* @param a pointer to a zero-terminated string
#define GNUNET_strdup(a) GNUNET_xstrdup_(a,__FILE__,__LINE__)
/**
- * Wrapper around GNUNET_strndup. Makes a partial copy of the string
+ * @ingroup memory
+ * Wrapper around #GNUNET_xstrndup_. Makes a partial copy of the string
* pointed to by a.
*
* @param a pointer to a string
#define GNUNET_strndup(a,length) GNUNET_xstrndup_(a,length,__FILE__,__LINE__)
/**
+ * @ingroup memory
* Grow a well-typed (!) array. This is a convenience
- * method to grow a vector <tt>arr</tt> of size <tt>size</tt>
- * to the new (target) size <tt>tsize</tt>.
+ * method to grow a vector @a arr of size @a size
+ * to the new (target) size @a tsize.
* <p>
*
* Example (simple, well-typed stack):
#define GNUNET_array_grow(arr,size,tsize) GNUNET_xgrow_((void**)&arr, sizeof(arr[0]), &size, tsize, __FILE__, __LINE__)
/**
+ * @ingroup memory
* Append an element to a list (growing the
* list by one).
*/
#define GNUNET_array_append(arr,size,element) do { GNUNET_array_grow(arr,size,size+1); arr[size-1] = element; } while(0)
/**
+ * @ingroup memory
* Like snprintf, just aborts if the buffer is of insufficient size.
*
* @param buf pointer to buffer that is written to
- * @param size number of bytes in buf
+ * @param size number of bytes in @a buf
* @param format format strings
* @param ... data for format string
* @return number of bytes written to buf or negative value on error
/**
+ * @ingroup memory
* Like asprintf, just portable.
*
* @param buf set to a buffer of sufficient size (allocated, caller must free)
/**
* Allocate memory. Checks the return value, aborts if no more
* memory is available. Don't use GNUNET_xmalloc_ directly. Use the
- * GNUNET_malloc macro.
+ * #GNUNET_malloc macro.
* The memory will be zero'ed out.
*
* @param size number of bytes to allocate
/**
* Allocate and initialize memory. Checks the return value, aborts if no more
* memory is available. Don't use GNUNET_xmemdup_ directly. Use the
- * GNUNET_memdup macro.
+ * #GNUNET_memdup macro.
*
* @param buf buffer to initialize from (must contain size bytes)
* @param size number of bytes to allocate
* Allocate memory. This function does not check if the allocation
* request is within reasonable bounds, allowing allocations larger
* than 40 MB. If you don't expect the possibility of very large
- * allocations, use GNUNET_malloc instead. The memory will be zero'ed
+ * allocations, use #GNUNET_malloc instead. The memory will be zero'ed
* out.
*
* @param size number of bytes to allocate
void *
GNUNET_xmalloc_unchecked_ (size_t size, const char *filename, int linenumber);
+
/**
* Reallocate memory. Checks the return value, aborts if no more
* memory is available.
void *
GNUNET_xrealloc_ (void *ptr, size_t n, const char *filename, int linenumber);
+
/**
* Free memory. Merely a wrapper for the case that we
* want to keep track of allocations. Don't use GNUNET_xfree_
- * directly. Use the GNUNET_free macro.
+ * directly. Use the #GNUNET_free macro.
*
* @param ptr pointer to memory to free
* @param filename where is this call being made (for debugging)
/**
- * Dup a string. Don't call GNUNET_xstrdup_ directly. Use the GNUNET_strdup macro.
+ * Dup a string. Don't call GNUNET_xstrdup_ directly. Use the #GNUNET_strdup macro.
* @param str string to duplicate
* @param filename where is this call being made (for debugging)
* @param linenumber line where this call is being made (for debugging)
GNUNET_xstrdup_ (const char *str, const char *filename, int linenumber);
/**
- * Dup partially a string. Don't call GNUNET_xstrndup_ directly. Use the GNUNET_strndup macro.
+ * Dup partially a string. Don't call GNUNET_xstrndup_ directly. Use the #GNUNET_strndup macro.
*
* @param str string to duplicate
* @param len length of the string to duplicate
* Grows old by (*oldCount-newCount)*elementSize
* bytes and sets *oldCount to newCount.
*
- * Don't call GNUNET_xgrow_ directly. Use the GNUNET_array_grow macro.
+ * Don't call GNUNET_xgrow_ directly. Use the #GNUNET_array_grow macro.
*
* @param old address of the pointer to the array
* *old may be NULL
/**
+ * @ingroup memory
* Create a copy of the given message.
*
* @param msg message to copy
#endif
#endif
+
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+
+
+
#endif /*GNUNET_COMMON_H_ */