2 This file is part of GNUnet.
3 (C) 2006-2013 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 3, 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 * @defgroup logging Logging
31 * @defgroup memory Memory management
33 #ifndef GNUNET_COMMON_H
34 #define GNUNET_COMMON_H
37 #include <sys/socket.h>
40 #include <netinet/in.h>
55 #if 0 /* keep Emacsens' auto-indent happy */
61 * Version of the API (for entire gnunetutil.so library).
63 #define GNUNET_UTIL_VERSION 0x00090501
66 * Named constants for return values. The following
67 * invariants hold: "GNUNET_NO == 0" (to allow "if (GNUNET_NO)")
68 * "GNUNET_OK != GNUNET_SYSERR", "GNUNET_OK != GNUNET_NO", "GNUNET_NO != GNUNET_SYSERR"
69 * and finally "GNUNET_YES != GNUNET_NO".
72 #define GNUNET_SYSERR -1
76 #define GNUNET_MIN(a,b) (((a) < (b)) ? (a) : (b))
78 #define GNUNET_MAX(a,b) (((a) > (b)) ? (a) : (b))
80 /* some systems use one underscore only, and mingw uses no underscore... */
83 #define __BYTE_ORDER _BYTE_ORDER
86 #define __BYTE_ORDER BYTE_ORDER
92 #define __BIG_ENDIAN _BIG_ENDIAN
95 #define __BIG_ENDIAN BIG_ENDIAN
99 #ifndef __LITTLE_ENDIAN
100 #ifdef _LITTLE_ENDIAN
101 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
104 #define __LITTLE_ENDIAN LITTLE_ENDIAN
111 * define GNUNET_EXTRA_LOGGING if using this header outside the GNUnet source
112 * tree where gnunet_config.h is unavailable
114 #ifndef GNUNET_EXTRA_LOGGING
115 #define GNUNET_EXTRA_LOGGING 0
122 # if __BYTE_ORDER == __LITTLE_ENDIAN
123 # define GNUNET_htobe16(x) __bswap_16 (x)
124 # define GNUNET_htole16(x) (x)
125 # define GNUNET_be16toh(x) __bswap_16 (x)
126 # define GNUNET_le16toh(x) (x)
128 # define GNUNET_htobe32(x) __bswap_32 (x)
129 # define GNUNET_htole32(x) (x)
130 # define GNUNET_be32toh(x) __bswap_32 (x)
131 # define GNUNET_le32toh(x) (x)
133 # define GNUNET_htobe64(x) __bswap_64 (x)
134 # define GNUNET_htole64(x) (x)
135 # define GNUNET_be64toh(x) __bswap_64 (x)
136 # define GNUNET_le64toh(x) (x)
138 # if __BYTE_ORDER == __BIG_ENDIAN
139 # define GNUNET_htobe16(x) (x)
140 # define GNUNET_htole16(x) __bswap_16 (x)
141 # define GNUNET_be16toh(x) (x)
142 # define GNUNET_le16toh(x) __bswap_16 (x)
144 # define GNUNET_htobe32(x) (x)
145 # define GNUNET_htole32(x) __bswap_32 (x)
146 # define GNUNET_be32toh(x) (x)
147 # define GNUNET_le32toh(x) __bswap_32 (x)
149 # define GNUNET_htobe64(x) (x)
150 # define GNUNET_htole64(x) __bswap_64 (x)
151 # define GNUNET_be64toh(x) (x)
152 # define GNUNET_le64toh(x) __bswap_64 (x)
159 * gcc-ism to get packed structs.
161 #define GNUNET_PACKED __attribute__((packed))
164 * gcc-ism to get gcc bitfield layout when compiling with -mms-bitfields
167 #define GNUNET_GCC_STRUCT_LAYOUT __attribute__((gcc_struct))
169 #define GNUNET_GCC_STRUCT_LAYOUT
173 * gcc-ism to force alignment; we use this to align char-arrays
174 * that may then be cast to 'struct's. See also gcc
177 #ifdef __BIGGEST_ALIGNMENT__
178 #define GNUNET_ALIGN __attribute__((aligned (__BIGGEST_ALIGNMENT__)))
180 #define GNUNET_ALIGN __attribute__((aligned (8)))
184 * gcc-ism to document unused arguments
186 #define GNUNET_UNUSED __attribute__((unused))
189 * gcc-ism to document functions that don't return
191 #define GNUNET_NORETURN __attribute__((noreturn))
196 * gcc 4.x-ism to pack structures even on W32 (to be used before structs);
197 * Using this would cause structs to be unaligned on the stack on Sparc,
198 * so we *only* use this on W32 (see #670578 from Debian); fortunately,
199 * W32 doesn't run on sparc anyway.
201 #define GNUNET_NETWORK_STRUCT_BEGIN \
202 _Pragma("pack(push)") \
206 * gcc 4.x-ism to pack structures even on W32 (to be used after structs)
207 * Using this would cause structs to be unaligned on the stack on Sparc,
208 * so we *only* use this on W32 (see #670578 from Debian); fortunately,
209 * W32 doesn't run on sparc anyway.
211 #define GNUNET_NETWORK_STRUCT_END _Pragma("pack(pop)")
214 #error gcc 4.x or higher required on W32 systems
218 * Define as empty, GNUNET_PACKED should suffice, but this won't work on W32
220 #define GNUNET_NETWORK_STRUCT_BEGIN
223 * Define as empty, GNUNET_PACKED should suffice, but this won't work on W32;
225 #define GNUNET_NETWORK_STRUCT_END
228 /* ************************ super-general types *********************** */
230 GNUNET_NETWORK_STRUCT_BEGIN
233 * Header for all communications.
235 struct GNUNET_MessageHeader
239 * The length of the struct (in bytes, including the length field itself),
240 * in big-endian format.
242 uint16_t size GNUNET_PACKED;
245 * The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
247 uint16_t type GNUNET_PACKED;
253 * @brief A SHA-512 hashcode
255 struct GNUNET_HashCode
257 uint32_t bits[512 / 8 / sizeof (uint32_t)]; /* = 16 */
262 * @brief A SHA-256 hashcode
264 struct GNUNET_CRYPTO_ShortHashCode
266 uint32_t bits[256 / 8 / sizeof (uint32_t)]; /* = 8 */
271 * The identity of the host (basically the SHA-512 hashcode of
274 struct GNUNET_PeerIdentity
276 struct GNUNET_HashCode hashPubKey;
278 GNUNET_NETWORK_STRUCT_END
281 * Function called with a filename.
284 * @param filename complete filename (absolute path)
285 * @return GNUNET_OK to continue to iterate,
286 * GNUNET_NO to stop iteration with no error,
287 * GNUNET_SYSERR to abort iteration with error!
289 typedef int (*GNUNET_FileNameCallback) (void *cls, const char *filename);
292 /* ****************************** logging ***************************** */
298 enum GNUNET_ErrorType
300 GNUNET_ERROR_TYPE_UNSPECIFIED = -1,
301 GNUNET_ERROR_TYPE_NONE = 0,
302 GNUNET_ERROR_TYPE_ERROR = 1,
303 GNUNET_ERROR_TYPE_WARNING = 2,
304 GNUNET_ERROR_TYPE_INFO = 4,
305 GNUNET_ERROR_TYPE_DEBUG = 8,
306 GNUNET_ERROR_TYPE_INVALID = 16,
307 GNUNET_ERROR_TYPE_BULK = 32
313 * User-defined handler for log messages.
316 * @param kind severeity
317 * @param component what component is issuing the message?
318 * @param date when was the message logged?
319 * @param message what is the message
321 typedef void (*GNUNET_Logger) (void *cls, enum GNUNET_ErrorType kind,
322 const char *component, const char *date,
323 const char *message);
328 * Get the number of log calls that are going to be skipped
330 * @return number of log calls to be ignored
333 GNUNET_get_log_skip ();
335 #if !defined(GNUNET_CULL_LOGGING)
337 GNUNET_get_log_call_status (int caller_level, const char *comp,
338 const char *file, const char *function, int line);
346 * @param kind how serious is the error?
347 * @param message what is the message (format string)
348 * @param ... arguments for format string
351 GNUNET_log_nocheck (enum GNUNET_ErrorType kind, const char *message, ...);
354 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
355 #define _GNUNET_BOOLEAN_EXPR(expr) \
357 int _gnunet_boolean_var_; \
359 _gnunet_boolean_var_ = 1; \
361 _gnunet_boolean_var_ = 0; \
362 _gnunet_boolean_var_; \
364 #define GN_LIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 1))
365 #define GN_UNLIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 0))
367 #define GN_LIKELY(expr) (expr)
368 #define GN_UNLIKELY(expr) (expr)
371 #if !defined(GNUNET_LOG_CALL_STATUS)
372 #define GNUNET_LOG_CALL_STATUS -1
378 * Log function that specifies an alternative component.
379 * This function should be used by plugins.
381 * @param kind how serious is the error?
382 * @param comp component responsible for generating the message
383 * @param message what is the message (format string)
384 * @param ... arguments for format string
387 GNUNET_log_from_nocheck (enum GNUNET_ErrorType kind, const char *comp,
388 const char *message, ...);
390 #if !defined(GNUNET_CULL_LOGGING)
391 #define GNUNET_log_from(kind,comp,...) do { int log_line = __LINE__;\
392 static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
393 if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
394 if (GN_UNLIKELY(log_call_enabled == -1))\
395 log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), (comp), __FILE__, __FUNCTION__, log_line); \
396 if (GN_UNLIKELY(GNUNET_get_log_skip () > 0)) { GNUNET_log_skip (-1, GNUNET_NO); }\
398 if (GN_UNLIKELY(log_call_enabled))\
399 GNUNET_log_from_nocheck ((kind), comp, __VA_ARGS__); \
404 #define GNUNET_log(kind,...) do { int log_line = __LINE__;\
405 static int log_call_enabled = GNUNET_LOG_CALL_STATUS;\
406 if ((GNUNET_EXTRA_LOGGING > 0) || ((GNUNET_ERROR_TYPE_DEBUG & (kind)) == 0)) { \
407 if (GN_UNLIKELY(log_call_enabled == -1))\
408 log_call_enabled = GNUNET_get_log_call_status ((kind) & (~GNUNET_ERROR_TYPE_BULK), NULL, __FILE__, __FUNCTION__, log_line);\
409 if (GN_UNLIKELY(GNUNET_get_log_skip () > 0)) { GNUNET_log_skip (-1, GNUNET_NO); }\
411 if (GN_UNLIKELY(log_call_enabled))\
412 GNUNET_log_nocheck ((kind), __VA_ARGS__); \
417 #define GNUNET_log(...)
418 #define GNUNET_log_from(...)
424 * Log error message about missing configuration option.
426 * @param kind log level
427 * @param section section with missing option
428 * @param option name of missing option
431 GNUNET_log_config_missing (enum GNUNET_ErrorType kind,
438 * Log error message about invalid configuration option value.
440 * @param kind log level
441 * @param section section with invalid option
442 * @param option name of invalid option
443 * @param required what is required that is invalid about the option
446 GNUNET_log_config_invalid (enum GNUNET_ErrorType kind,
449 const char *required);
454 * Abort the process, generate a core dump if possible.
457 GNUNET_abort (void) GNUNET_NORETURN;
462 * Ignore the next @a n calls to the log function.
464 * @param n number of log calls to ignore (could be negative)
465 * @param check_reset GNUNET_YES to assert that the log skip counter is currently zero
468 GNUNET_log_skip (int n, int check_reset);
475 * @param comp default component to use
476 * @param loglevel what types of messages should be logged
477 * @param logfile change logging to logfile (use NULL to keep stderr)
478 * @return GNUNET_OK on success, GNUNET_SYSERR if logfile could not be opened
481 GNUNET_log_setup (const char *comp, const char *loglevel, const char *logfile);
486 * Add a custom logger.
488 * @param logger log function
489 * @param logger_cls closure for logger
492 GNUNET_logger_add (GNUNET_Logger logger, void *logger_cls);
497 * Remove a custom logger.
499 * @param logger log function
500 * @param logger_cls closure for logger
503 GNUNET_logger_remove (GNUNET_Logger logger, void *logger_cls);
508 * Convert a short hash value to a string (for printing debug messages).
509 * This is one of the very few calls in the entire API that is
512 * @param hc the short hash code
516 GNUNET_short_h2s (const struct GNUNET_CRYPTO_ShortHashCode * hc);
521 * Convert a short hash value to a string (for printing debug messages).
522 * This prints all 104 characters of a hashcode!
523 * This is one of the very few calls in the entire API that is
526 * @param hc the short hash code
530 GNUNET_short_h2s_full (const struct GNUNET_CRYPTO_ShortHashCode * hc);
535 * Convert a hash value to a string (for printing debug messages).
536 * This is one of the very few calls in the entire API that is
539 * @param hc the hash code
543 GNUNET_h2s (const struct GNUNET_HashCode * hc);
548 * Convert a hash value to a string (for printing debug messages).
549 * This prints all 104 characters of a hashcode!
550 * This is one of the very few calls in the entire API that is
553 * @param hc the hash code
557 GNUNET_h2s_full (const struct GNUNET_HashCode * hc);
562 * Convert a peer identity to a string (for printing debug messages).
563 * This is one of the very few calls in the entire API that is
566 * @param pid the peer identity
567 * @return string form of the pid; will be overwritten by next
568 * call to GNUNET_i2s.
571 GNUNET_i2s (const struct GNUNET_PeerIdentity *pid);
576 * Convert a peer identity to a string (for printing debug messages).
577 * This is one of the very few calls in the entire API that is
580 * @param pid the peer identity
581 * @return string form of the pid; will be overwritten by next
582 * call to GNUNET_i2s.
585 GNUNET_i2s_full (const struct GNUNET_PeerIdentity *pid);
590 * Convert a "struct sockaddr*" (IPv4 or IPv6 address) to a string
591 * (for printing debug messages). This is one of the very few calls
592 * in the entire API that is NOT reentrant!
594 * @param addr the address
595 * @param addrlen the length of the address
596 * @return nicely formatted string for the address
597 * will be overwritten by next call to GNUNET_a2s.
600 GNUNET_a2s (const struct sockaddr *addr, socklen_t addrlen);
605 * Convert error type to string.
607 * @param kind type to convert
608 * @return string corresponding to the type
611 GNUNET_error_type_to_string (enum GNUNET_ErrorType kind);
616 * Use this for fatal errors that cannot be handled
618 #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)
623 * Use this for fatal errors that cannot be handled
625 #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)
630 * Use this for internal assertion violations that are
631 * not fatal (can be handled) but should not occur.
633 #define GNUNET_break(cond) do { if (! (cond)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Assertion failed at %s:%d.\n"), __FILE__, __LINE__); } } while(0)
638 * Use this for assertion violations caused by other
639 * peers (i.e. protocol violations). We do not want to
640 * confuse end-users (say, some other peer runs an
641 * older, broken or incompatible GNUnet version), but
642 * we still want to see these problems during
643 * development and testing. "OP == other peer".
645 #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)
650 * Log an error message at log-level 'level' that indicates
651 * a failure of the command 'cmd' with the message given
652 * by strerror(errno).
654 #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)
659 * Log an error message at log-level 'level' that indicates
660 * a failure of the command 'cmd' with the message given
661 * by strerror(errno).
663 #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)
668 * Log an error message at log-level 'level' that indicates
669 * a failure of the command 'cmd' with the message given
670 * by strerror(errno).
672 #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)
677 * Log an error message at log-level 'level' that indicates
678 * a failure of the command 'cmd' with the message given
679 * by strerror(errno).
681 #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)
683 /* ************************* endianess conversion ****************** */
686 * Convert unsigned 64-bit integer to host-byte-order.
687 * @param n the value in network byte order
688 * @return the same value in host byte order
691 GNUNET_ntohll (uint64_t n);
694 * Convert unsigned 64-bit integer to network-byte-order.
695 * @param n the value in host byte order
696 * @return the same value in network byte order
699 GNUNET_htonll (uint64_t n);
702 * Convert double to network-byte-order.
703 * @param d the value in network byte order
704 * @return the same value in host byte order
707 GNUNET_hton_double (double d);
710 * Convert double to host-byte-order
711 * @param d the value in network byte order
712 * @return the same value in host byte order
715 GNUNET_ntoh_double (double d);
717 /* ************************* allocation functions ****************** */
721 * Maximum allocation with GNUNET_malloc macro.
723 #define GNUNET_MAX_MALLOC_CHECKED (1024 * 1024 * 40)
727 * Allocate a struct or union of the given 'type'.
728 * Wrapper around GNUNET_malloc that returns a pointer
729 * to the newly created object of the correct type.
731 * @param type name of the struct or union, i.e. pass 'struct Foo'.
733 #define GNUNET_new(type) (type *) GNUNET_malloc (sizeof (type))
737 * Wrapper around malloc. Allocates size bytes of memory.
738 * The memory will be zero'ed out.
740 * @param size the number of bytes to allocate, must be
741 * smaller than 40 MB.
742 * @return pointer to size bytes of memory, never NULL (!)
744 #define GNUNET_malloc(size) GNUNET_xmalloc_(size, __FILE__, __LINE__)
748 * Allocate and initialize a block of memory.
750 * @param buf data to initalize the block with
751 * @param size the number of bytes in buf (and size of the allocation)
752 * @return pointer to size bytes of memory, never NULL (!)
754 #define GNUNET_memdup(buf,size) GNUNET_xmemdup_(buf, size, __FILE__, __LINE__)
758 * Wrapper around malloc. Allocates size bytes of memory.
759 * The memory will be zero'ed out.
761 * @param size the number of bytes to allocate
762 * @return pointer to size bytes of memory, NULL if we do not have enough memory
764 #define GNUNET_malloc_large(size) GNUNET_xmalloc_unchecked_(size, __FILE__, __LINE__)
768 * Wrapper around realloc. Rellocates size bytes of memory.
770 * @param ptr the pointer to reallocate
771 * @param size the number of bytes to reallocate
772 * @return pointer to size bytes of memory
774 #define GNUNET_realloc(ptr, size) GNUNET_xrealloc_(ptr, size, __FILE__, __LINE__)
778 * Wrapper around free. Frees the memory referred to by ptr.
779 * Note that is is generally better to free memory that was
780 * allocated with GNUNET_array_grow using GNUNET_array_grow(mem, size, 0) instead of GNUNET_free.
782 * @param ptr location where to free the memory. ptr must have
783 * been returned by GNUNET_strdup, GNUNET_strndup, GNUNET_malloc or GNUNET_array_grow earlier.
785 #define GNUNET_free(ptr) GNUNET_xfree_(ptr, __FILE__, __LINE__)
789 * Free the memory pointed to by ptr if ptr is not NULL.
790 * Equivalent to if (ptr!=null)GNUNET_free(ptr).
792 * @param ptr the location in memory to free
794 #define GNUNET_free_non_null(ptr) do { void * __x__ = ptr; if (__x__ != NULL) { GNUNET_free(__x__); } } while(0)
798 * Wrapper around GNUNET_strdup. Makes a copy of the zero-terminated string
801 * @param a pointer to a zero-terminated string
802 * @return a copy of the string including zero-termination
804 #define GNUNET_strdup(a) GNUNET_xstrdup_(a,__FILE__,__LINE__)
808 * Wrapper around GNUNET_strndup. Makes a partial copy of the string
811 * @param a pointer to a string
812 * @param length of the string to duplicate
813 * @return a partial copy of the string including zero-termination
815 #define GNUNET_strndup(a,length) GNUNET_xstrndup_(a,length,__FILE__,__LINE__)
819 * Grow a well-typed (!) array. This is a convenience
820 * method to grow a vector <tt>arr</tt> of size <tt>size</tt>
821 * to the new (target) size <tt>tsize</tt>.
824 * Example (simple, well-typed stack):
827 * static struct foo * myVector = NULL;
828 * static int myVecLen = 0;
830 * static void push(struct foo * elem) {
831 * GNUNET_array_grow(myVector, myVecLen, myVecLen+1);
832 * memcpy(&myVector[myVecLen-1], elem, sizeof(struct foo));
835 * static void pop(struct foo * elem) {
836 * if (myVecLen == 0) die();
837 * memcpy(elem, myVector[myVecLen-1], sizeof(struct foo));
838 * GNUNET_array_grow(myVector, myVecLen, myVecLen-1);
842 * @param arr base-pointer of the vector, may be NULL if size is 0;
843 * will be updated to reflect the new address. The TYPE of
844 * arr is important since size is the number of elements and
845 * not the size in bytes
846 * @param size the number of elements in the existing vector (number
847 * of elements to copy over)
848 * @param tsize the target size for the resulting vector, use 0 to
849 * free the vector (then, arr will be NULL afterwards).
851 #define GNUNET_array_grow(arr,size,tsize) GNUNET_xgrow_((void**)&arr, sizeof(arr[0]), &size, tsize, __FILE__, __LINE__)
855 * Append an element to a list (growing the
858 #define GNUNET_array_append(arr,size,element) do { GNUNET_array_grow(arr,size,size+1); arr[size-1] = element; } while(0)
862 * Like snprintf, just aborts if the buffer is of insufficient size.
864 * @param buf pointer to buffer that is written to
865 * @param size number of bytes in buf
866 * @param format format strings
867 * @param ... data for format string
868 * @return number of bytes written to buf or negative value on error
871 GNUNET_snprintf (char *buf, size_t size, const char *format, ...);
876 * Like asprintf, just portable.
878 * @param buf set to a buffer of sufficient size (allocated, caller must free)
879 * @param format format string (see printf, fprintf, etc.)
880 * @param ... data for format string
881 * @return number of bytes in "*buf" excluding 0-termination
884 GNUNET_asprintf (char **buf, const char *format, ...);
887 /* ************** internal implementations, use macros above! ************** */
890 * Allocate memory. Checks the return value, aborts if no more
891 * memory is available. Don't use GNUNET_xmalloc_ directly. Use the
892 * GNUNET_malloc macro.
893 * The memory will be zero'ed out.
895 * @param size number of bytes to allocate
896 * @param filename where is this call being made (for debugging)
897 * @param linenumber line where this call is being made (for debugging)
898 * @return allocated memory, never NULL
901 GNUNET_xmalloc_ (size_t size, const char *filename, int linenumber);
905 * Allocate and initialize memory. Checks the return value, aborts if no more
906 * memory is available. Don't use GNUNET_xmemdup_ directly. Use the
907 * GNUNET_memdup macro.
909 * @param buf buffer to initialize from (must contain size bytes)
910 * @param size number of bytes to allocate
911 * @param filename where is this call being made (for debugging)
912 * @param linenumber line where this call is being made (for debugging)
913 * @return allocated memory, never NULL
916 GNUNET_xmemdup_ (const void *buf, size_t size, const char *filename,
921 * Allocate memory. This function does not check if the allocation
922 * request is within reasonable bounds, allowing allocations larger
923 * than 40 MB. If you don't expect the possibility of very large
924 * allocations, use GNUNET_malloc instead. The memory will be zero'ed
927 * @param size number of bytes to allocate
928 * @param filename where is this call being made (for debugging)
929 * @param linenumber line where this call is being made (for debugging)
930 * @return pointer to size bytes of memory, NULL if we do not have enough memory
933 GNUNET_xmalloc_unchecked_ (size_t size, const char *filename, int linenumber);
936 * Reallocate memory. Checks the return value, aborts if no more
937 * memory is available.
940 GNUNET_xrealloc_ (void *ptr, size_t n, const char *filename, int linenumber);
943 * Free memory. Merely a wrapper for the case that we
944 * want to keep track of allocations. Don't use GNUNET_xfree_
945 * directly. Use the GNUNET_free macro.
947 * @param ptr pointer to memory to free
948 * @param filename where is this call being made (for debugging)
949 * @param linenumber line where this call is being made (for debugging)
952 GNUNET_xfree_ (void *ptr, const char *filename, int linenumber);
956 * Dup a string. Don't call GNUNET_xstrdup_ directly. Use the GNUNET_strdup macro.
957 * @param str string to duplicate
958 * @param filename where is this call being made (for debugging)
959 * @param linenumber line where this call is being made (for debugging)
960 * @return the duplicated string
963 GNUNET_xstrdup_ (const char *str, const char *filename, int linenumber);
966 * Dup partially a string. Don't call GNUNET_xstrndup_ directly. Use the GNUNET_strndup macro.
968 * @param str string to duplicate
969 * @param len length of the string to duplicate
970 * @param filename where is this call being made (for debugging)
971 * @param linenumber line where this call is being made (for debugging)
972 * @return the duplicated string
975 GNUNET_xstrndup_ (const char *str, size_t len, const char *filename,
979 * Grow an array, the new elements are zeroed out.
980 * Grows old by (*oldCount-newCount)*elementSize
981 * bytes and sets *oldCount to newCount.
983 * Don't call GNUNET_xgrow_ directly. Use the GNUNET_array_grow macro.
985 * @param old address of the pointer to the array
987 * @param elementSize the size of the elements of the array
988 * @param oldCount address of the number of elements in the *old array
989 * @param newCount number of elements in the new array, may be 0 (then *old will be NULL afterwards)
990 * @param filename where is this call being made (for debugging)
991 * @param linenumber line where this call is being made (for debugging)
994 GNUNET_xgrow_ (void **old, size_t elementSize, unsigned int *oldCount,
995 unsigned int newCount, const char *filename, int linenumber);
1000 * Create a copy of the given message.
1002 * @param msg message to copy
1003 * @return duplicate of the message
1005 struct GNUNET_MessageHeader *
1006 GNUNET_copy_message (const struct GNUNET_MessageHeader *msg);
1009 #if __STDC_VERSION__ < 199901L
1011 #define __func__ __FUNCTION__
1013 #define __func__ "<unknown>"
1020 #if 0 /* keep Emacsens' auto-indent happy */
1030 #endif /*GNUNET_COMMON_H_ */