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apr_general.h
/* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef APR_GENERAL_H #define APR_GENERAL_H /** * @file apr_general.h * This is collection of oddballs that didn't fit anywhere else, * and might move to more appropriate headers with the release * of APR 1.0. * @brief APR Miscellaneous library routines */ #include "apr.h" #include "apr_pools.h" #include "apr_errno.h" #if APR_HAVE_SIGNAL_H #include <signal.h> #endif #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /** * @defgroup apr_general Miscellaneous library routines * @ingroup APR * This is collection of oddballs that didn't fit anywhere else, * and might move to more appropriate headers with the release * of APR 1.0. * @{ */ /** FALSE */ #ifndef FALSE #define FALSE 0 #endif /** TRUE */ #ifndef TRUE #define TRUE (!FALSE) #endif /** a space */ #define APR_ASCII_BLANK '\040' /** a carrige return */ #define APR_ASCII_CR '\015' /** a line feed */ #define APR_ASCII_LF '\012' /** a tab */ #define APR_ASCII_TAB '\011' /** signal numbers typedef */ typedef int apr_signum_t; /** * Finding offsets of elements within structures. * Taken from the X code... they've sweated portability of this stuff * so we don't have to. Sigh... * @param p_type pointer type name * @param field data field within the structure pointed to * @return offset */ #if defined(CRAY) || (defined(__arm) && !(defined(LINUX) || defined(__FreeBSD__))) #ifdef __STDC__ #define APR_OFFSET(p_type,field) _Offsetof(p_type,field) #else #ifdef CRAY2 #define APR_OFFSET(p_type,field) \ (sizeof(int)*((unsigned int)&(((p_type)NULL)->field))) #else /* !CRAY2 */ #define APR_OFFSET(p_type,field) ((unsigned int)&(((p_type)NULL)->field)) #endif /* !CRAY2 */ #endif /* __STDC__ */ #else /* ! (CRAY || __arm) */ #define APR_OFFSET(p_type,field) \ ((long) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) #endif /* !CRAY */ /** * Finding offsets of elements within structures. * @param s_type structure type name * @param field data field within the structure * @return offset */ #if defined(__has_builtin) #if __has_builtin(__builtin_offsetof) #define APR_OFFSETOF(s_type,field) __builtin_offsetof(s_type,field) #endif #endif /* __has_builtin */ #ifndef APR_OFFSETOF #if defined(offsetof) && !defined(__cplusplus) #define APR_OFFSETOF(s_type,field) offsetof(s_type,field) #else #define APR_OFFSETOF(s_type,field) APR_OFFSET(s_type*,field) #endif #endif /* ndef APR_OFFSETOF */ #ifndef DOXYGEN /* A couple of prototypes for functions in case some platform doesn't * have it */ #if (!APR_HAVE_STRCASECMP) && (APR_HAVE_STRICMP) #define strcasecmp(s1, s2) stricmp(s1, s2) #elif (!APR_HAVE_STRCASECMP) int strcasecmp(const char *a, const char *b); #endif #if (!APR_HAVE_STRNCASECMP) && (APR_HAVE_STRNICMP) #define strncasecmp(s1, s2, n) strnicmp(s1, s2, n) #elif (!APR_HAVE_STRNCASECMP) int strncasecmp(const char *a, const char *b, size_t n); #endif #endif /** * Alignment macros */ /* APR_ALIGN() is only to be used to align on a power of 2 boundary */ #define APR_ALIGN(size, boundary) \ (((size) + ((boundary) - 1)) & ~((boundary) - 1)) /** Default alignment */ #define APR_ALIGN_DEFAULT(size) APR_ALIGN(size, 8) /** * String and memory functions */ /* APR_STRINGIFY is defined here, and also in apr_release.h, so wrap it */ #ifndef APR_STRINGIFY /** Properly quote a value as a string in the C preprocessor */ #define APR_STRINGIFY(n) APR_STRINGIFY_HELPER(n) /** Helper macro for APR_STRINGIFY */ #define APR_STRINGIFY_HELPER(n) #n #endif #if (!APR_HAVE_MEMMOVE) #define memmove(a,b,c) bcopy(b,a,c) #endif #if (!APR_HAVE_MEMCHR) void *memchr(const void *s, int c, size_t n); #endif /** @} */ /** * @defgroup apr_library Library initialization and termination * @{ */ /** * Setup any APR internal data structures. This MUST be the first function * called for any APR library. It is safe to call apr_initialize several * times as long as apr_terminate() is called the same number of times. * @remark See apr_app_initialize() if this is an application, rather than * a library consumer of apr. */ APR_DECLARE(apr_status_t) apr_initialize(void); /** * Set up an application with normalized argc, argv (and optionally env) in * order to deal with platform-specific oddities, such as Win32 services, * code pages and signals. This must be the first function called for any * APR program. * @param argc Pointer to the argc that may be corrected * @param argv Pointer to the argv that may be corrected * @param env Pointer to the env that may be corrected, may be NULL * @remark See apr_initialize() if this is a library consumer of apr. * Otherwise, this call is identical to apr_initialize(), and must be closed * with a call to apr_terminate() at the end of program execution. */ APR_DECLARE(apr_status_t) apr_app_initialize(int *argc, char const * const * *argv, char const * const * *env); /** * Tear down any APR internal data structures which aren't torn down * automatically. apr_terminate must be called once for every call to * apr_initialize() or apr_app_initialize(). * @remark An APR program must call this function at termination once it * has stopped using APR services. The APR developers suggest using * @c atexit(apr_terminate) to ensure this is called. When using APR * from a language other than C that has problems with the calling * convention, use apr_terminate2() instead. * @see apr_terminate2 */ APR_DECLARE_NONSTD(void) apr_terminate(void); /** * Tear down any APR internal data structures which aren't torn down * automatically, same as apr_terminate() * @remark An APR program must call either the apr_terminate() or apr_terminate2 * function once it it has finished using APR services. The APR * developers suggest using @c atexit(apr_terminate) to ensure this is done. * apr_terminate2 exists to allow non-c language apps to tear down apr, * while apr_terminate() is recommended from c language applications. */ APR_DECLARE(void) apr_terminate2(void); /** @} */ /** * @defgroup apr_random Random Functions * @{ */ #if APR_HAS_RANDOM || defined(DOXYGEN) /* TODO: I'm not sure this is the best place to put this prototype...*/ /** * Generate random bytes. * @param buf Buffer to fill with random bytes * @param length Length of buffer in bytes */ APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char * buf, apr_size_t length); #endif /** @} */ #ifdef __cplusplus } #endif #endif /* ! APR_GENERAL_H */
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