2 This file is part of GNUnet.
3 (C) 2006, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file include/gnunet_common.h
23 * @brief commonly used definitions; globals in this file
24 * are exempt from the rule that the module name ("common")
25 * must be part of the symbol name.
27 * @author Christian Grothoff
30 #ifndef GNUNET_COMMON_H
31 #define GNUNET_COMMON_H
34 #include <sys/socket.h>
37 #include <netinet/in.h>
50 * Version of the API (for entire gnunetutil.so library).
52 #define GNUNET_UTIL_VERSION 0x00090200
55 * Named constants for return values. The following
56 * invariants hold: "GNUNET_NO == 0" (to allow "if (GNUNET_NO)")
57 * "GNUNET_OK != GNUNET_SYSERR", "GNUNET_OK != GNUNET_NO", "GNUNET_NO != GNUNET_SYSERR"
58 * and finally "GNUNET_YES != GNUNET_NO".
61 #define GNUNET_SYSERR -1
65 #define GNUNET_MIN(a,b) (((a) < (b)) ? (a) : (b))
67 #define GNUNET_MAX(a,b) (((a) > (b)) ? (a) : (b))
69 /* some systems use one underscore only, and mingw uses no underscore... */
72 #define __BYTE_ORDER _BYTE_ORDER
75 #define __BYTE_ORDER BYTE_ORDER
81 #define __BIG_ENDIAN _BIG_ENDIAN
84 #define __BIG_ENDIAN BIG_ENDIAN
88 #ifndef __LITTLE_ENDIAN
90 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
93 #define __LITTLE_ENDIAN LITTLE_ENDIAN
102 # if __BYTE_ORDER == __LITTLE_ENDIAN
103 # define GNUNET_htobe16(x) __bswap_16 (x)
104 # define GNUNET_htole16(x) (x)
105 # define GNUNET_be16toh(x) __bswap_16 (x)
106 # define GNUNET_le16toh(x) (x)
108 # define GNUNET_htobe32(x) __bswap_32 (x)
109 # define GNUNET_htole32(x) (x)
110 # define GNUNET_be32toh(x) __bswap_32 (x)
111 # define GNUNET_le32toh(x) (x)
113 # define GNUNET_htobe64(x) __bswap_64 (x)
114 # define GNUNET_htole64(x) (x)
115 # define GNUNET_be64toh(x) __bswap_64 (x)
116 # define GNUNET_le64toh(x) (x)
118 # if __BYTE_ORDER == __BIG_ENDIAN
119 # define GNUNET_htobe16(x) (x)
120 # define GNUNET_htole16(x) __bswap_16 (x)
121 # define GNUNET_be16toh(x) (x)
122 # define GNUNET_le16toh(x) __bswap_16 (x)
124 # define GNUNET_htobe32(x) (x)
125 # define GNUNET_htole32(x) __bswap_32 (x)
126 # define GNUNET_be32toh(x) (x)
127 # define GNUNET_le32toh(x) __bswap_32 (x)
129 # define GNUNET_htobe64(x) (x)
130 # define GNUNET_htole64(x) __bswap_64 (x)
131 # define GNUNET_be64toh(x) (x)
132 # define GNUNET_le64toh(x) __bswap_64 (x)
139 * gcc-ism to get packed structs.
141 #define GNUNET_PACKED __attribute__((packed))
144 * gcc-ism to get gcc bitfield layout when compiling with -mms-bitfields
147 #define GNUNET_GCC_STRUCT_LAYOUT __attribute__((gcc_struct))
149 #define GNUNET_GCC_STRUCT_LAYOUT
153 * gcc-ism to document unused arguments
155 #define GNUNET_UNUSED __attribute__((unused))
158 * gcc-ism to document functions that don't return
160 #define GNUNET_NORETURN __attribute__((noreturn))
164 * gcc 4.x-ism to pack structures even on W32 (to be used before structs)
166 #define GNUNET_NETWORK_STRUCT_BEGIN \
167 _Pragma("pack(push)") \
171 * gcc 4.x-ism to pack structures even on W32 (to be used after structs)
173 #define GNUNET_NETWORK_STRUCT_END _Pragma("pack(pop)")
176 #error gcc 4.x or higher required on W32 systems
179 * Good luck, GNUNET_PACKED should suffice, but this won't work on W32
181 #define GNUNET_NETWORK_STRUCT_BEGIN
184 * Good luck, GNUNET_PACKED should suffice, but this won't work on W32
186 #define GNUNET_NETWORK_STRUCT_END
189 /* ************************ super-general types *********************** */
191 GNUNET_NETWORK_STRUCT_BEGIN
194 * Header for all communications.
196 struct GNUNET_MessageHeader
200 * The length of the struct (in bytes, including the length field itself),
201 * in big-endian format.
203 uint16_t size GNUNET_PACKED;
206 * The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
208 uint16_t type GNUNET_PACKED;
214 * @brief 512-bit hashcode
216 typedef struct GNUNET_HashCode
218 uint32_t bits[512 / 8 / sizeof (uint32_t)]; /* = 16 */
224 * The identity of the host (basically the SHA-512 hashcode of
227 struct GNUNET_PeerIdentity
229 GNUNET_HashCode hashPubKey;
231 GNUNET_NETWORK_STRUCT_END
234 * Function called with a filename.
237 * @param filename complete filename (absolute path)
238 * @return GNUNET_OK to continue to iterate,
239 * GNUNET_SYSERR to abort iteration with error!
241 typedef int (*GNUNET_FileNameCallback) (void *cls, const char *filename);
244 /* ****************************** logging ***************************** */
249 enum GNUNET_ErrorType
251 GNUNET_ERROR_TYPE_UNSPECIFIED = -1,
252 GNUNET_ERROR_TYPE_NONE = 0,
253 GNUNET_ERROR_TYPE_ERROR = 1,
254 GNUNET_ERROR_TYPE_WARNING = 2,
255 GNUNET_ERROR_TYPE_INFO = 4,
256 GNUNET_ERROR_TYPE_DEBUG = 8,
257 GNUNET_ERROR_TYPE_INVALID = 16,
258 GNUNET_ERROR_TYPE_BULK = 32
263 * User-defined handler for log messages.
266 * @param kind severeity
267 * @param component what component is issuing the message?
268 * @param date when was the message logged?
269 * @param message what is the message
271 typedef void (*GNUNET_Logger) (void *cls, enum GNUNET_ErrorType kind,
272 const char *component, const char *date,
273 const char *message);
277 * Number of log calls to ignore.
279 extern unsigned int skip_log;
281 #if !defined(GNUNET_CULL_LOGGING)
283 GNUNET_get_log_call_status (int caller_level, const char *comp,
284 const char *file, const char *function, int line);
289 * @param kind how serious is the error?
290 * @param message what is the message (format string)
291 * @param ... arguments for format string
294 GNUNET_log_nocheck (enum GNUNET_ErrorType kind, const char *message, ...);
297 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
298 #define _GNUNET_BOOLEAN_EXPR(expr) \
300 int _gnunet_boolean_var_; \
302 _gnunet_boolean_var_ = 1; \
304 _gnunet_boolean_var_ = 0; \
305 _gnunet_boolean_var_; \
307 #define GN_LIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 1))
308 #define GN_UNLIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 0))
310 #define GN_LIKELY(expr) (expr)
311 #define GN_UNLIKELY(expr) (expr)
314 #if !defined(GNUNET_LOG_CALL_STATUS)
315 #define GNUNET_LOG_CALL_STATUS -1
319 * Log function that specifies an alternative component.
320 * This function should be used by plugins.
322 * @param kind how serious is the error?
323 * @param comp component responsible for generating the message
324 * @param message what is the message (format string)
325 * @param ... arguments for format string
328 GNUNET_log_from_nocheck (enum GNUNET_ErrorType kind, const char *comp,
329 const char *message, ...);
331 #if !defined(GNUNET_CULL_LOGGING)
332 #define GNUNET_log_from(kind,comp,...) do { int log_line = __LINE__;\
333 static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
334 if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
335 if (GN_UNLIKELY(log_call_enabled == -1))\
336 log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), (comp), __FILE__, __FUNCTION__, log_line); \
337 if (GN_UNLIKELY(skip_log > 0)) {skip_log--;}\
339 if (GN_UNLIKELY(log_call_enabled))\
340 GNUNET_log_from_nocheck ((kind), comp, __VA_ARGS__); \
345 #define GNUNET_log(kind,...) do { int log_line = __LINE__;\
346 static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
347 if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
348 if (GN_UNLIKELY(log_call_enabled == -1))\
349 log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), NULL, __FILE__, __FUNCTION__, log_line);\
350 if (GN_UNLIKELY(skip_log > 0)) {skip_log--;}\
352 if (GN_UNLIKELY(log_call_enabled))\
353 GNUNET_log_nocheck ((kind), __VA_ARGS__); \
358 #define GNUNET_log(...)
359 #define GNUNET_log_from(...)
364 * Abort the process, generate a core dump if possible.
367 GNUNET_abort (void) GNUNET_NORETURN;
370 * Ignore the next n calls to the log function.
372 * @param n number of log calls to ignore
373 * @param check_reset GNUNET_YES to assert that the log skip counter is currently zero
376 GNUNET_log_skip (unsigned int n, int check_reset);
382 * @param comp default component to use
383 * @param loglevel what types of messages should be logged
384 * @param logfile change logging to logfile (use NULL to keep stderr)
385 * @return GNUNET_OK on success, GNUNET_SYSERR if logfile could not be opened
388 GNUNET_log_setup (const char *comp, const char *loglevel, const char *logfile);
392 * Add a custom logger.
394 * @param logger log function
395 * @param logger_cls closure for logger
398 GNUNET_logger_add (GNUNET_Logger logger, void *logger_cls);
402 * Remove a custom logger.
404 * @param logger log function
405 * @param logger_cls closure for logger
408 GNUNET_logger_remove (GNUNET_Logger logger, void *logger_cls);
412 * Convert a hash value to a string (for printing debug messages).
413 * This is one of the very few calls in the entire API that is
416 * @param hc the hash code
420 GNUNET_h2s (const GNUNET_HashCode * hc);
424 * Convert a hash value to a string (for printing debug messages).
425 * This prints all 104 characters of a hashcode!
426 * This is one of the very few calls in the entire API that is
429 * @param hc the hash code
433 GNUNET_h2s_full (const GNUNET_HashCode * hc);
437 * Convert a peer identity to a string (for printing debug messages).
438 * This is one of the very few calls in the entire API that is
441 * @param pid the peer identity
442 * @return string form of the pid; will be overwritten by next
443 * call to GNUNET_i2s.
446 GNUNET_i2s (const struct GNUNET_PeerIdentity *pid);
449 * Convert a peer identity to a string (for printing debug messages).
450 * This is one of the very few calls in the entire API that is
453 * @param pid the peer identity
454 * @return string form of the pid; will be overwritten by next
455 * call to GNUNET_i2s.
458 GNUNET_i2s_full (const struct GNUNET_PeerIdentity *pid);
461 * Convert a "struct sockaddr*" (IPv4 or IPv6 address) to a string
462 * (for printing debug messages). This is one of the very few calls
463 * in the entire API that is NOT reentrant!
465 * @param addr the address
466 * @param addrlen the length of the address
467 * @return nicely formatted string for the address
468 * will be overwritten by next call to GNUNET_a2s.
471 GNUNET_a2s (const struct sockaddr *addr, socklen_t addrlen);
474 * Convert error type to string.
476 * @param kind type to convert
477 * @return string corresponding to the type
480 GNUNET_error_type_to_string (enum GNUNET_ErrorType kind);
484 * Use this for fatal errors that cannot be handled
486 #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)
489 * Use this for fatal errors that cannot be handled
491 #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)
494 * Use this for internal assertion violations that are
495 * not fatal (can be handled) but should not occur.
497 #define GNUNET_break(cond) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Assertion failed at %s:%d.\n"), __FILE__, __LINE__); } } while(0)
500 * Use this for assertion violations caused by other
501 * peers (i.e. protocol violations). We do not want to
502 * confuse end-users (say, some other peer runs an
503 * older, broken or incompatible GNUnet version), but
504 * we still want to see these problems during
505 * development and testing. "OP == other peer".
507 #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)
510 * Log an error message at log-level 'level' that indicates
511 * a failure of the command 'cmd' with the message given
512 * by strerror(errno).
514 #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)
517 * Log an error message at log-level 'level' that indicates
518 * a failure of the command 'cmd' with the message given
519 * by strerror(errno).
521 #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)
524 * Log an error message at log-level 'level' that indicates
525 * a failure of the command 'cmd' with the message given
526 * by strerror(errno).
528 #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)
531 * Log an error message at log-level 'level' that indicates
532 * a failure of the command 'cmd' with the message given
533 * by strerror(errno).
535 #define GNUNET_log_from_strerror_file(level, component, cmd, filename) do { GNUNET_log_from (level, component, _("`%s' failed on file `%s' at %s:%d with error: %s\n"), cmd, filename,__FILE__, __LINE__, STRERROR(errno)); } while(0)
537 /* ************************* endianess conversion ****************** */
540 * Convert unsigned 64-bit integer to host-byte-order.
541 * @param n the value in network byte order
542 * @return the same value in host byte order
545 GNUNET_ntohll (uint64_t n);
548 * Convert unsigned 64-bit integer to network-byte-order.
549 * @param n the value in host byte order
550 * @return the same value in network byte order
553 GNUNET_htonll (uint64_t n);
556 * Convert double to network-byte-order.
557 * @param d the value in network byte order
558 * @return the same value in host byte order
561 GNUNET_hton_double (double d);
564 * Convert double to host-byte-order
565 * @param d the value in network byte order
566 * @return the same value in host byte order
569 GNUNET_ntoh_double (double d);
571 /* ************************* allocation functions ****************** */
574 * Maximum allocation with GNUNET_malloc macro.
576 #define GNUNET_MAX_MALLOC_CHECKED (1024 * 1024 * 40)
579 * Wrapper around malloc. Allocates size bytes of memory.
580 * The memory will be zero'ed out.
582 * @param size the number of bytes to allocate, must be
583 * smaller than 40 MB.
584 * @return pointer to size bytes of memory, never NULL (!)
586 #define GNUNET_malloc(size) GNUNET_xmalloc_(size, __FILE__, __LINE__)
589 * Allocate and initialize a block of memory.
591 * @param buf data to initalize the block with
592 * @param size the number of bytes in buf (and size of the allocation)
593 * @return pointer to size bytes of memory, never NULL (!)
595 #define GNUNET_memdup(buf,size) GNUNET_xmemdup_(buf, size, __FILE__, __LINE__)
598 * Wrapper around malloc. Allocates size bytes of memory.
599 * The memory will be zero'ed out.
601 * @param size the number of bytes to allocate
602 * @return pointer to size bytes of memory, NULL if we do not have enough memory
604 #define GNUNET_malloc_large(size) GNUNET_xmalloc_unchecked_(size, __FILE__, __LINE__)
607 * Wrapper around realloc. Rellocates size bytes of memory.
609 * @param ptr the pointer to reallocate
610 * @param size the number of bytes to reallocate
611 * @return pointer to size bytes of memory
613 #define GNUNET_realloc(ptr, size) GNUNET_xrealloc_(ptr, size, __FILE__, __LINE__)
616 * Wrapper around free. Frees the memory referred to by ptr.
617 * Note that is is generally better to free memory that was
618 * allocated with GNUNET_array_grow using GNUNET_array_grow(mem, size, 0) instead of GNUNET_free.
620 * @param ptr location where to free the memory. ptr must have
621 * been returned by GNUNET_strdup, GNUNET_strndup, GNUNET_malloc or GNUNET_array_grow earlier.
623 #define GNUNET_free(ptr) GNUNET_xfree_(ptr, __FILE__, __LINE__)
626 * Free the memory pointed to by ptr if ptr is not NULL.
627 * Equivalent to if (ptr!=null)GNUNET_free(ptr).
629 * @param ptr the location in memory to free
631 #define GNUNET_free_non_null(ptr) do { void * __x__ = ptr; if (__x__ != NULL) { GNUNET_free(__x__); } } while(0)
634 * Wrapper around GNUNET_strdup. Makes a copy of the zero-terminated string
637 * @param a pointer to a zero-terminated string
638 * @return a copy of the string including zero-termination
640 #define GNUNET_strdup(a) GNUNET_xstrdup_(a,__FILE__,__LINE__)
643 * Wrapper around GNUNET_strndup. Makes a partial copy of the string
646 * @param a pointer to a string
647 * @param length of the string to duplicate
648 * @return a partial copy of the string including zero-termination
650 #define GNUNET_strndup(a,length) GNUNET_xstrndup_(a,length,__FILE__,__LINE__)
653 * Grow a well-typed (!) array. This is a convenience
654 * method to grow a vector <tt>arr</tt> of size <tt>size</tt>
655 * to the new (target) size <tt>tsize</tt>.
658 * Example (simple, well-typed stack):
661 * static struct foo * myVector = NULL;
662 * static int myVecLen = 0;
664 * static void push(struct foo * elem) {
665 * GNUNET_array_grow(myVector, myVecLen, myVecLen+1);
666 * memcpy(&myVector[myVecLen-1], elem, sizeof(struct foo));
669 * static void pop(struct foo * elem) {
670 * if (myVecLen == 0) die();
671 * memcpy(elem, myVector[myVecLen-1], sizeof(struct foo));
672 * GNUNET_array_grow(myVector, myVecLen, myVecLen-1);
676 * @param arr base-pointer of the vector, may be NULL if size is 0;
677 * will be updated to reflect the new address. The TYPE of
678 * arr is important since size is the number of elements and
679 * not the size in bytes
680 * @param size the number of elements in the existing vector (number
681 * of elements to copy over)
682 * @param tsize the target size for the resulting vector, use 0 to
683 * free the vector (then, arr will be NULL afterwards).
685 #define GNUNET_array_grow(arr,size,tsize) GNUNET_xgrow_((void**)&arr, sizeof(arr[0]), &size, tsize, __FILE__, __LINE__)
688 * Append an element to a list (growing the
691 #define GNUNET_array_append(arr,size,element) do { GNUNET_array_grow(arr,size,size+1); arr[size-1] = element; } while(0)
694 * Like snprintf, just aborts if the buffer is of insufficient size.
696 * @param buf pointer to buffer that is written to
697 * @param size number of bytes in buf
698 * @param format format strings
699 * @param ... data for format string
700 * @return number of bytes written to buf or negative value on error
703 GNUNET_snprintf (char *buf, size_t size, const char *format, ...);
707 * Like asprintf, just portable.
709 * @param buf set to a buffer of sufficient size (allocated, caller must free)
710 * @param format format string (see printf, fprintf, etc.)
711 * @param ... data for format string
712 * @return number of bytes in "*buf" excluding 0-termination
715 GNUNET_asprintf (char **buf, const char *format, ...);
718 /* ************** internal implementations, use macros above! ************** */
721 * Allocate memory. Checks the return value, aborts if no more
722 * memory is available. Don't use GNUNET_xmalloc_ directly. Use the
723 * GNUNET_malloc macro.
724 * The memory will be zero'ed out.
726 * @param size number of bytes to allocate
727 * @param filename where is this call being made (for debugging)
728 * @param linenumber line where this call is being made (for debugging)
729 * @return allocated memory, never NULL
732 GNUNET_xmalloc_ (size_t size, const char *filename, int linenumber);
736 * Allocate and initialize memory. Checks the return value, aborts if no more
737 * memory is available. Don't use GNUNET_xmemdup_ directly. Use the
738 * GNUNET_memdup macro.
740 * @param buf buffer to initialize from (must contain size bytes)
741 * @param size number of bytes to allocate
742 * @param filename where is this call being made (for debugging)
743 * @param linenumber line where this call is being made (for debugging)
744 * @return allocated memory, never NULL
747 GNUNET_xmemdup_ (const void *buf, size_t size, const char *filename,
752 * Allocate memory. This function does not check if the allocation
753 * request is within reasonable bounds, allowing allocations larger
754 * than 40 MB. If you don't expect the possibility of very large
755 * allocations, use GNUNET_malloc instead. The memory will be zero'ed
758 * @param size number of bytes to allocate
759 * @param filename where is this call being made (for debugging)
760 * @param linenumber line where this call is being made (for debugging)
761 * @return pointer to size bytes of memory, NULL if we do not have enough memory
764 GNUNET_xmalloc_unchecked_ (size_t size, const char *filename, int linenumber);
767 * Reallocate memory. Checks the return value, aborts if no more
768 * memory is available.
771 GNUNET_xrealloc_ (void *ptr, size_t n, const char *filename, int linenumber);
774 * Free memory. Merely a wrapper for the case that we
775 * want to keep track of allocations. Don't use GNUNET_xfree_
776 * directly. Use the GNUNET_free macro.
778 * @param ptr pointer to memory to free
779 * @param filename where is this call being made (for debugging)
780 * @param linenumber line where this call is being made (for debugging)
783 GNUNET_xfree_ (void *ptr, const char *filename, int linenumber);
787 * Dup a string. Don't call GNUNET_xstrdup_ directly. Use the GNUNET_strdup macro.
788 * @param str string to duplicate
789 * @param filename where is this call being made (for debugging)
790 * @param linenumber line where this call is being made (for debugging)
791 * @return the duplicated string
794 GNUNET_xstrdup_ (const char *str, const char *filename, int linenumber);
797 * Dup partially a string. Don't call GNUNET_xstrndup_ directly. Use the GNUNET_strndup macro.
799 * @param str string to duplicate
800 * @param len length of the string to duplicate
801 * @param filename where is this call being made (for debugging)
802 * @param linenumber line where this call is being made (for debugging)
803 * @return the duplicated string
806 GNUNET_xstrndup_ (const char *str, size_t len, const char *filename,
810 * Grow an array, the new elements are zeroed out.
811 * Grows old by (*oldCount-newCount)*elementSize
812 * bytes and sets *oldCount to newCount.
814 * Don't call GNUNET_xgrow_ directly. Use the GNUNET_array_grow macro.
816 * @param old address of the pointer to the array
818 * @param elementSize the size of the elements of the array
819 * @param oldCount address of the number of elements in the *old array
820 * @param newCount number of elements in the new array, may be 0 (then *old will be NULL afterwards)
821 * @param filename where is this call being made (for debugging)
822 * @param linenumber line where this call is being made (for debugging)
825 GNUNET_xgrow_ (void **old, size_t elementSize, unsigned int *oldCount,
826 unsigned int newCount, const char *filename, int linenumber);
830 * Create a copy of the given message.
832 * @param msg message to copy
833 * @return duplicate of the message
835 struct GNUNET_MessageHeader *
836 GNUNET_copy_message (const struct GNUNET_MessageHeader *msg);
839 #if __STDC_VERSION__ < 199901L
841 #define __func__ __FUNCTION__
843 #define __func__ "<unknown>"
847 #endif /*GNUNET_COMMON_H_ */