apr_version.h File Reference

APR Versioning Interface. More...

#include "apr.h"

Go to the source code of this file.

Data Structures
struct	apr_version_t

Macros
#define	APR_COPYRIGHT
#define	APR_MAJOR_VERSION   2
#define	APR_MINOR_VERSION   0
#define	APR_PATCH_VERSION   0
#define	APR_IS_DEV_VERSION
#define	APR_VERSION_AT_LEAST(major, minor, patch)
#define	APR_IS_DEV_STRING   "-dev"
#define	APR_STRINGIFY(n)   APR_STRINGIFY_HELPER(n)
#define	APR_STRINGIFY_HELPER(n)   #n
#define	APR_VERSION_STRING
#define	APR_VERSION_STRING_CSV

Functions
void	apr_version (apr_version_t *pvsn)
const char *	apr_version_string (void)

Detailed Description

APR Versioning Interface.

APR's Version

There are several different mechanisms for accessing the version. There is a string form, and a set of numbers; in addition, there are constants which can be compiled into your application, and you can query the library being used for its actual version.

Note that it is possible for an application to detect that it has been compiled against a different version of APR by use of the compile-time constants and the use of the run-time query function.

APR version numbering follows the guidelines specified in:

http://apr.apache.org/versioning.html

Macro Definition Documentation

#define APR_COPYRIGHT

Value:

"Copyright (c) 2000-2016 The Apache Software " \
                      "Foundation or its licensors, as applicable."

#define APR_IS_DEV_STRING   "-dev"

Internal: string form of the "is dev" flag

#define APR_IS_DEV_VERSION

The symbol APR_IS_DEV_VERSION is only defined for internal, "development" copies of APR. It is undefined for released versions of APR.

#define APR_MAJOR_VERSION   2

major version Major API changes that could cause compatibility problems for older programs such as structure size changes. No binary compatibility is possible across a change in the major version.

#define APR_MINOR_VERSION   0

minor version Minor API changes that do not cause binary compatibility problems. Reset to 0 when upgrading APR_MAJOR_VERSION

#define APR_PATCH_VERSION   0

patch level The Patch Level never includes API changes, simply bug fixes. Reset to 0 when upgrading APR_MINOR_VERSION

#define APR_STRINGIFY

(

n

)

APR_STRINGIFY_HELPER(n)

Properly quote a value as a string in the C preprocessor

#define APR_STRINGIFY_HELPER

(

n

)

#n

Helper macro for APR_STRINGIFY

#define APR_VERSION_AT_LEAST	(		major,
			minor,
			patch
	)

Value:

(((major) < APR_MAJOR_VERSION)                                     \
 || ((major) == APR_MAJOR_VERSION && (minor) < APR_MINOR_VERSION) \
 || ((major) == APR_MAJOR_VERSION && (minor) == APR_MINOR_VERSION && (patch) <= APR_PATCH_VERSION))

Check at compile time if the APR version is at least a certain level.

Parameters

major	The major version component of the version checked for (e.g., the "1" of "1.3.0").
minor	The minor version component of the version checked for (e.g., the "3" of "1.3.0").
patch	The patch level component of the version checked for (e.g., the "0" of "1.3.0").

Remarks

This macro is available with APR versions starting with 1.3.0.

#define APR_VERSION_STRING

Value:

APR_STRINGIFY(APR_MAJOR_VERSION) "." \
     APR_STRINGIFY(APR_MINOR_VERSION) "." \
     APR_STRINGIFY(APR_PATCH_VERSION) \
     APR_IS_DEV_STRING

The formatted string of APR's version

#define APR_VERSION_STRING_CSV

Value:

APR_MAJOR_VERSION, \
                               APR_MINOR_VERSION, \
                               APR_PATCH_VERSION

An alternative formatted string of APR's version

Function Documentation

void apr_version

(

apr_version_t *

pvsn

)

Return APR's version information information in a numeric form.

Parameters

pvsn	Pointer to a version structure for returning the version information.

const char* apr_version_string

(

void

)

Return APR's version information as a string.