/* This file is part of GNUnet. (C) 2006, 2009 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 option) any later version. GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNUnet; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /** * @file include/gnunet_common.h * @brief commonly used definitions; globals in this file * are exempt from the rule that the module name ("common") * must be part of the symbol name. * * @author Christian Grothoff * @author Nils Durner */ #ifndef GNUNET_COMMON_H #define GNUNET_COMMON_H #if HAVE_SYS_SOCKET_H #include #endif #if HAVE_NETINET_IN_H #include #endif #ifdef MINGW #include "winproc.h" #endif #ifdef HAVE_STDINT_H #include #endif #ifdef HAVE_STDARG_H #include #endif /** * Version of the API (for entire gnunetutil.so library). */ #define GNUNET_UTIL_VERSION 0x00090200 /** * Named constants for return values. The following * invariants hold: "GNUNET_NO == 0" (to allow "if (GNUNET_NO)") * "GNUNET_OK != GNUNET_SYSERR", "GNUNET_OK != GNUNET_NO", "GNUNET_NO != GNUNET_SYSERR" * and finally "GNUNET_YES != GNUNET_NO". */ #define GNUNET_OK 1 #define GNUNET_SYSERR -1 #define GNUNET_YES 1 #define GNUNET_NO 0 #define GNUNET_MIN(a,b) (((a) < (b)) ? (a) : (b)) #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 /** * Endian operations */ # if __BYTE_ORDER == __LITTLE_ENDIAN # define GNUNET_htobe16(x) __bswap_16 (x) # define GNUNET_htole16(x) (x) # define GNUNET_be16toh(x) __bswap_16 (x) # define GNUNET_le16toh(x) (x) # define GNUNET_htobe32(x) __bswap_32 (x) # define GNUNET_htole32(x) (x) # define GNUNET_be32toh(x) __bswap_32 (x) # define GNUNET_le32toh(x) (x) # define GNUNET_htobe64(x) __bswap_64 (x) # define GNUNET_htole64(x) (x) # define GNUNET_be64toh(x) __bswap_64 (x) # define GNUNET_le64toh(x) (x) #endif # if __BYTE_ORDER == __BIG_ENDIAN # define GNUNET_htobe16(x) (x) # define GNUNET_htole16(x) __bswap_16 (x) # define GNUNET_be16toh(x) (x) # define GNUNET_le16toh(x) __bswap_16 (x) # define GNUNET_htobe32(x) (x) # define GNUNET_htole32(x) __bswap_32 (x) # define GNUNET_be32toh(x) (x) # define GNUNET_le32toh(x) __bswap_32 (x) # define GNUNET_htobe64(x) (x) # define GNUNET_htole64(x) __bswap_64 (x) # define GNUNET_be64toh(x) (x) # define GNUNET_le64toh(x) __bswap_64 (x) #endif /** * gcc-ism to get packed structs. */ #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 __GNUC__ > 3 /** * gcc 4.x-ism to pack structures even on W32 (to be used before structs) */ #define GNUNET_NETWORK_STRUCT_BEGIN \ _Pragma("pack(push)") \ _Pragma("pack(1)") /** * gcc 4.x-ism to pack structures even on W32 (to be used after structs) */ #define GNUNET_NETWORK_STRUCT_END _Pragma("pack(pop)") #else #ifdef MINGW #error gcc 4.x or higher required on W32 systems #endif /** * Good luck, GNUNET_PACKED should suffice, but this won't work on W32 */ #define GNUNET_NETWORK_STRUCT_BEGIN /** * Good luck, GNUNET_PACKED should suffice, but this won't work on W32 */ #define GNUNET_NETWORK_STRUCT_END #endif /* ************************ super-general types *********************** */ GNUNET_NETWORK_STRUCT_BEGIN /** * Header for all communications. */ struct GNUNET_MessageHeader { /** * The length of the struct (in bytes, including the length field itself), * in big-endian format. */ uint16_t size GNUNET_PACKED; /** * The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format. */ uint16_t type GNUNET_PACKED; }; /** * @brief 512-bit hashcode */ typedef struct GNUNET_HashCode { uint32_t bits[512 / 8 / sizeof (uint32_t)]; /* = 16 */ } GNUNET_HashCode; /** * The identity of the host (basically the SHA-512 hashcode of * it's public key). */ struct GNUNET_PeerIdentity { GNUNET_HashCode hashPubKey; }; GNUNET_NETWORK_STRUCT_END /** * Function called with a filename. * * @param cls closure * @param filename complete filename (absolute path) * @return GNUNET_OK to continue to iterate, * GNUNET_SYSERR to abort iteration with error! */ typedef int (*GNUNET_FileNameCallback) (void *cls, const char *filename); /* ****************************** logging ***************************** */ /** * Types of errors. */ enum GNUNET_ErrorType { GNUNET_ERROR_TYPE_UNSPECIFIED = -1, GNUNET_ERROR_TYPE_NONE = 0, GNUNET_ERROR_TYPE_ERROR = 1, GNUNET_ERROR_TYPE_WARNING = 2, GNUNET_ERROR_TYPE_INFO = 4, GNUNET_ERROR_TYPE_DEBUG = 8, GNUNET_ERROR_TYPE_INVALID = 16, GNUNET_ERROR_TYPE_BULK = 32 }; /** * User-defined handler for log messages. * * @param cls closure * @param kind severeity * @param component what component is issuing the message? * @param date when was the message logged? * @param message what is the message */ typedef void (*GNUNET_Logger) (void *cls, enum GNUNET_ErrorType kind, const char *component, const char *date, const char *message); /** * Number of log calls to ignore. */ extern unsigned int skip_log; #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); #endif /** * Main log function. * * @param kind how serious is the error? * @param message what is the message (format string) * @param ... arguments for format string */ void GNUNET_log_nocheck (enum GNUNET_ErrorType kind, const char *message, ...); /* from glib */ #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) #define _GNUNET_BOOLEAN_EXPR(expr) \ __extension__ ({ \ int _gnunet_boolean_var_; \ if (expr) \ _gnunet_boolean_var_ = 1; \ else \ _gnunet_boolean_var_ = 0; \ _gnunet_boolean_var_; \ }) #define GN_LIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 1)) #define GN_UNLIKELY(expr) (__builtin_expect (_GNUNET_BOOLEAN_EXPR(expr), 0)) #else #define GN_LIKELY(expr) (expr) #define GN_UNLIKELY(expr) (expr) #endif #if !defined(GNUNET_LOG_CALL_STATUS) #define GNUNET_LOG_CALL_STATUS -1 #endif /** * Log function that specifies an alternative component. * This function should be used by plugins. * * @param kind how serious is the error? * @param comp component responsible for generating the message * @param message what is the message (format string) * @param ... arguments for format string */ void GNUNET_log_from_nocheck (enum GNUNET_ErrorType kind, const char *comp, const char *message, ...); #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 ((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(skip_log > 0)) {skip_log--;}\ 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 ((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(skip_log > 0)) {skip_log--;}\ else {\ if (GN_UNLIKELY(log_call_enabled))\ GNUNET_log_nocheck ((kind), __VA_ARGS__); \ }\ }\ } while (0) #else #define GNUNET_log(...) #define GNUNET_log_from(...) #endif /** * Abort the process, generate a core dump if possible. */ void GNUNET_abort (void) GNUNET_NORETURN; /** * Ignore the next n calls to the log function. * * @param n number of log calls to ignore * @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); /** * 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 */ int GNUNET_log_setup (const char *comp, const char *loglevel, const char *logfile); /** * Add a custom logger. * * @param logger log function * @param logger_cls closure for logger */ void GNUNET_logger_add (GNUNET_Logger logger, void *logger_cls); /** * Remove a custom logger. * * @param logger log function * @param logger_cls closure for logger */ void GNUNET_logger_remove (GNUNET_Logger logger, void *logger_cls); /** * 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! * * @param hc the hash code * @return string */ const char * GNUNET_h2s (const GNUNET_HashCode * hc); /** * 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 * NOT reentrant! * * @param hc the hash code * @return string */ const char * GNUNET_h2s_full (const GNUNET_HashCode * hc); /** * 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 (const struct GNUNET_PeerIdentity *pid); /** * 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); /** * 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! * * @param addr the address * @param addrlen the length of the address * @return nicely formatted string for the address * will be overwritten by next call to GNUNET_a2s. */ const char * GNUNET_a2s (const struct sockaddr *addr, socklen_t addrlen); /** * Convert error type to string. * * @param kind type to convert * @return string corresponding to the type */ const char * GNUNET_error_type_to_string (enum GNUNET_ErrorType kind); /** * 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) /** * 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) /** * 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) /** * 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 * older, broken or incompatible GNUnet version), but * we still want to see these problems during * development and testing. "OP == other peer". */ #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) /** * 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) /** * 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) /** * 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) /** * 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_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) /* ************************* endianess conversion ****************** */ /** * Convert unsigned 64-bit integer to host-byte-order. * @param n the value in network byte order * @return the same value in host byte order */ uint64_t GNUNET_ntohll (uint64_t n); /** * Convert unsigned 64-bit integer to network-byte-order. * @param n the value in host byte order * @return the same value in network byte order */ 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 ****************** */ /** * Maximum allocation with GNUNET_malloc macro. */ #define GNUNET_MAX_MALLOC_CHECKED (1024 * 1024 * 40) /** * Wrapper around malloc. Allocates size bytes of memory. * The memory will be zero'ed out. * * @param size the number of bytes to allocate, must be * smaller than 40 MB. * @return pointer to size bytes of memory, never NULL (!) */ #define GNUNET_malloc(size) GNUNET_xmalloc_(size, __FILE__, __LINE__) /** * Allocate and initialize a block of memory. * * @param buf data to initalize the block with * @param size the number of bytes in buf (and size of the allocation) * @return pointer to size bytes of memory, never NULL (!) */ #define GNUNET_memdup(buf,size) GNUNET_xmemdup_(buf, size, __FILE__, __LINE__) /** * Wrapper around malloc. Allocates size bytes of memory. * The memory will be zero'ed out. * * @param size the number of bytes to allocate * @return pointer to size bytes of memory, NULL if we do not have enough memory */ #define GNUNET_malloc_large(size) GNUNET_xmalloc_unchecked_(size, __FILE__, __LINE__) /** * Wrapper around realloc. Rellocates size bytes of memory. * * @param ptr the pointer to reallocate * @param size the number of bytes to reallocate * @return pointer to size bytes of memory */ #define GNUNET_realloc(ptr, size) GNUNET_xrealloc_(ptr, size, __FILE__, __LINE__) /** * 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. * * @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. */ #define GNUNET_free(ptr) GNUNET_xfree_(ptr, __FILE__, __LINE__) /** * Free the memory pointed to by ptr if ptr is not NULL. * Equivalent to if (ptr!=null)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 * pointed to by a. * * @param a pointer to a zero-terminated string * @return a copy of the string including zero-termination */ #define GNUNET_strdup(a) GNUNET_xstrdup_(a,__FILE__,__LINE__) /** * Wrapper around GNUNET_strndup. Makes a partial copy of the string * pointed to by a. * * @param a pointer to a string * @param length of the string to duplicate * @return a partial copy of the string including zero-termination */ #define GNUNET_strndup(a,length) GNUNET_xstrndup_(a,length,__FILE__,__LINE__) /** * Grow a well-typed (!) array. This is a convenience * method to grow a vector arr of size size * to the new (target) size tsize. *

* * Example (simple, well-typed stack): * * 

 * static struct foo * myVector = NULL;
 * static int myVecLen = 0;
 *
 * static void push(struct foo * elem) {
 *   GNUNET_array_grow(myVector, myVecLen, myVecLen+1);
 *   memcpy(&myVector[myVecLen-1], elem, sizeof(struct foo));
 * }
 *
 * static void pop(struct foo * elem) {
 *   if (myVecLen == 0) die();
 *   memcpy(elem, myVector[myVecLen-1], sizeof(struct foo));
 *   GNUNET_array_grow(myVector, myVecLen, myVecLen-1);
 * }
 *
* * @param arr base-pointer of the vector, may be NULL if size is 0; * will be updated to reflect the new address. The TYPE of * arr is important since size is the number of elements and * not the size in bytes * @param size the number of elements in the existing vector (number * of elements to copy over) * @param tsize the target size for the resulting vector, use 0 to * free the vector (then, arr will be NULL afterwards). */ #define GNUNET_array_grow(arr,size,tsize) GNUNET_xgrow_((void**)&arr, sizeof(arr[0]), &size, tsize, __FILE__, __LINE__) /** * 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) /** * 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 format format strings * @param ... data for format string * @return number of bytes written to buf or negative value on error */ int GNUNET_snprintf (char *buf, size_t size, const char *format, ...); /** * Like asprintf, just portable. * * @param buf set to a buffer of sufficient size (allocated, caller must free) * @param format format string (see printf, fprintf, etc.) * @param ... data for format string * @return number of bytes in "*buf" excluding 0-termination */ int GNUNET_asprintf (char **buf, const char *format, ...); /* ************** internal implementations, use macros above! ************** */ /** * Allocate memory. Checks the return value, aborts if no more * memory is available. Don't use GNUNET_xmalloc_ directly. Use the * GNUNET_malloc macro. * The memory will be zero'ed out. * * @param size number of bytes to allocate * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) * @return allocated memory, never NULL */ void * GNUNET_xmalloc_ (size_t size, const char *filename, int linenumber); /** * 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. * * @param buf buffer to initialize from (must contain size bytes) * @param size number of bytes to allocate * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) * @return allocated memory, never NULL */ void * GNUNET_xmemdup_ (const void *buf, size_t size, const char *filename, int linenumber); /** * 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 * out. * * @param size number of bytes to allocate * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) * @return pointer to size bytes of memory, NULL if we do not have enough memory */ 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. * * @param ptr pointer to memory to free * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) */ void GNUNET_xfree_ (void *ptr, const char *filename, int linenumber); /** * 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) * @return the duplicated string */ char * 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. * * @param str string to duplicate * @param len length of the string to duplicate * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) * @return the duplicated string */ char * GNUNET_xstrndup_ (const char *str, size_t len, const char *filename, int linenumber); /** * Grow an array, the new elements are zeroed out. * Grows old by (*oldCount-newCount)*elementSize * bytes and sets *oldCount to newCount. * * 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 * @param elementSize the size of the elements of the array * @param oldCount address of the number of elements in the *old array * @param newCount number of elements in the new array, may be 0 (then *old will be NULL afterwards) * @param filename where is this call being made (for debugging) * @param linenumber line where this call is being made (for debugging) */ void GNUNET_xgrow_ (void **old, size_t elementSize, unsigned int *oldCount, unsigned int newCount, const char *filename, int linenumber); /** * Create a copy of the given message. * * @param msg message to copy * @return duplicate of the message */ struct GNUNET_MessageHeader * GNUNET_copy_message (const struct GNUNET_MessageHeader *msg); #if __STDC_VERSION__ < 199901L #if __GNUC__ >= 2 #define __func__ __FUNCTION__ #else #define __func__ "" #endif #endif #endif /*GNUNET_COMMON_H_ */