mirror of https://gitee.com/openkylin/glib2.0.git
198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1998 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gversion.h"
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/**
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* SECTION:version
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* @Title: Version Information
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* @Short_description: variables and functions to check the GLib version
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*
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* GLib provides version information, primarily useful in configure
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* checks for builds that have a configure script. Applications will
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* not typically use the features described here.
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*
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* The GLib headers annotate deprecated APIs in a way that produces
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* compiler warnings if these deprecated APIs are used. The warnings
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* can be turned off by defining the macro %GLIB_DISABLE_DEPRECATION_WARNINGS
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* before including the glib.h header.
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*
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* GLib also provides support for building applications against
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* defined subsets of deprecated or new GLib APIs. Define the macro
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* %GLIB_VERSION_MIN_REQUIRED to specify up to what version of GLib
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* you want to receive warnings about deprecated APIs. Define the
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* macro %GLIB_VERSION_MAX_ALLOWED to specify the newest version of
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* GLib whose API you want to use.
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*/
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/**
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* glib_major_version:
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*
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* The major version of the GLib library.
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*
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* An integer variable exported from the library linked
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* against at application run time.
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*/
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/**
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* GLIB_MAJOR_VERSION:
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*
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* The major version number of the GLib library.
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*
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* Like #glib_major_version, but from the headers used at
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* application compile time, rather than from the library
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* linked against at application run time.
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*/
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/**
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* glib_minor_version:
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*
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* The minor version number of the GLib library.
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*
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* An integer variable exported from the library linked
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* against at application run time.
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*/
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/**
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* GLIB_MINOR_VERSION:
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*
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* The minor version number of the GLib library.
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*
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* Like #gtk_minor_version, but from the headers used at
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* application compile time, rather than from the library
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* linked against at application run time.
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*/
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/**
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* glib_micro_version:
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*
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* The micro version number of the GLib library.
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*
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* An integer variable exported from the library linked
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* against at application run time.
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*/
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/**
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* GLIB_MICRO_VERSION:
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*
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* The micro version number of the GLib library.
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*
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* Like #gtk_micro_version, but from the headers used at
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* application compile time, rather than from the library
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* linked against at application run time.
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*/
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/**
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* GLIB_CHECK_VERSION:
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* @major: the major version to check for
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* @minor: the minor version to check for
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* @micro: the micro version to check for
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*
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* Checks whether the version of the GLib library that is being compiled
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* against is greater than or equal to the given one.
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*
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* See glib_check_version() for a runtime check.
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*
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* Returns: %TRUE if the version of the GLib header files
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* is the same as or newer than the passed-in version.
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*/
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/**
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* glib_binary_age:
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*
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* The binary age of the GLib library.
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* Defines how far back backwards compatibility reaches.
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*
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* An integer variable exported from the library linked
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* against at application run time.
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*/
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/**
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* glib_interface_age:
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*
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* The interface age of the GLib library.
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* Defines how far back the API has last been extended.
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*
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* An integer variable exported from the library linked
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* against at application run time.
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*/
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const guint glib_major_version = GLIB_MAJOR_VERSION;
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const guint glib_minor_version = GLIB_MINOR_VERSION;
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const guint glib_micro_version = GLIB_MICRO_VERSION;
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const guint glib_interface_age = GLIB_INTERFACE_AGE;
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const guint glib_binary_age = GLIB_BINARY_AGE;
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/**
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* glib_check_version:
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* @required_major: the required major version
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* @required_minor: the required minor version
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* @required_micro: the required micro version
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*
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* Checks that the GLib library in use is compatible with the
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* given version.
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*
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* Generally you would pass in the constants %GLIB_MAJOR_VERSION,
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* %GLIB_MINOR_VERSION, %GLIB_MICRO_VERSION as the three arguments
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* to this function; that produces a check that the library in use
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* is compatible with the version of GLib the application or module
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* was compiled against.
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*
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* Compatibility is defined by two things: first the version
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* of the running library is newer than the version
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* `@required_major.required_minor.@required_micro`. Second
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* the running library must be binary compatible with the
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* version `@required_major.@required_minor.@required_micro`
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* (same major version.)
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*
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* Returns: (transfer none) (nullable): %NULL if the GLib library is
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* compatible with the given version, or a string describing the
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* version mismatch. The returned string is owned by GLib and must
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* not be modified or freed.
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*
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* Since: 2.6
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*/
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const gchar *
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glib_check_version (guint required_major,
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guint required_minor,
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guint required_micro)
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{
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gint glib_effective_micro = 100 * GLIB_MINOR_VERSION + GLIB_MICRO_VERSION;
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gint required_effective_micro = 100 * required_minor + required_micro;
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if (required_major > GLIB_MAJOR_VERSION)
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return "GLib version too old (major mismatch)";
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if (required_major < GLIB_MAJOR_VERSION)
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return "GLib version too new (major mismatch)";
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if (required_effective_micro < glib_effective_micro - GLIB_BINARY_AGE)
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return "GLib version too new (micro mismatch)";
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if (required_effective_micro > glib_effective_micro)
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return "GLib version too old (micro mismatch)";
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return NULL;
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}
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