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New function to check the version of GLib at runtime. (#149175, Michael

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Tue Aug  3 14:58:20 2004  Matthias Clasen  <maclas@gmx.de>

	* glib/gutils.h:
	* glib/gutils.c (glib_check_version): New function to
	check the version of GLib at runtime.  (#149175, Michael Natterer)
This commit is contained in:
Matthias Clasen 2004-08-03 19:41:02 +00:00 committed by Matthias Clasen
parent 247843302a
commit a62fd5ec60
7 changed files with 211 additions and 52 deletions
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7
docs/reference/ChangeLog
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@ -1,3 +1,10 @@
Tue Aug 3 15:34:16 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib-sections.txt: Add a separate section for
version information.
* glib/glib-docs.sgml: Include version section.
* glib/tmpl/version.sgml: New template.
2004-08-02 Matthias Clasen <mclasen@redhat.com>
* glib/glib-sections.txt:

2
docs/reference/glib/glib-docs.sgml
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@ -55,6 +55,7 @@
<!ENTITY glib-Shell SYSTEM "xml/shell.xml">
<!ENTITY glib-Markup SYSTEM "xml/markup.xml">
<!ENTITY glib-i18n SYSTEM "xml/i18n.xml">
<!ENTITY glib-Version SYSTEM "xml/version.xml">
<!ENTITY glib-Compiling SYSTEM "compiling.sgml">
<!ENTITY glib-Building SYSTEM "building.sgml">
@ -100,6 +101,7 @@ synchronize their operation.
<chapter id="glib-fundamentals">
<title>GLib Fundamentals</title>
&glib-Version;
&glib-Basic-Types;
&glib-Limits-of-Basic-Types;
&glib-Standard-Macros;

26
docs/reference/glib/glib-sections.txt
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@ -95,20 +95,30 @@ G_MAXDOUBLE
</SECTION>
<SECTION>
<TITLE>Standard Macros</TITLE>
<FILE>macros</FILE>
<TITLE>Version Information</TITLE>
<FILE>version</FILE>
glib_major_version
glib_minor_version
glib_micro_version
glib_binary_age
glib_interface_age
glib_check_version
<SUBSECTION>
GLIB_MAJOR_VERSION
GLIB_MINOR_VERSION
GLIB_MICRO_VERSION
GLIB_CHECK_VERSION
</SECTION>
<SECTION>
<TITLE>Standard Macros</TITLE>
<FILE>macros</FILE>
<SUBSECTION>
G_OS_WIN32
G_OS_BEOS
G_OS_UNIX
<SUBSECTION>
GLIB_CHECK_VERSION
<SUBSECTION>
G_DIR_SEPARATOR
G_DIR_SEPARATOR_S
@ -141,12 +151,6 @@ G_MEM_ALIGN
<SUBSECTION>
G_CONST_RETURN
<SUBSECTION Private>
glib_major_version
glib_micro_version
glib_minor_version
glib_interface_age
glib_binary_age
</SECTION>
<SECTION>

41
docs/reference/glib/tmpl/macros.sgml
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@ -14,27 +14,6 @@ These macros provide a few commonly-used features.
</para>
<!-- ##### MACRO GLIB_MAJOR_VERSION ##### -->
<para>
The major version number of the GLib library.
</para>
<!-- ##### MACRO GLIB_MINOR_VERSION ##### -->
<para>
The minor version number of the GLib library.
</para>
<!-- ##### MACRO GLIB_MICRO_VERSION ##### -->
<para>
The micro version number of the GLib library.
</para>
<!-- ##### MACRO G_OS_WIN32 ##### -->
<para>
This macro is defined only on Windows. So you can bracket
@ -59,26 +38,6 @@ UNIX-specific code in "&num;ifdef G_OS_UNIX".
<!-- ##### MACRO GLIB_CHECK_VERSION ##### -->
<para>
Checks the version of the GLib library.
It returns %TRUE if the GLib library is the same or newer than the given
version.
<example>
<title>Checking the version of the GLib library</title>
<programlisting>
if (!GLIB_CHECK_VERSION (1, 2, 0))
g_error ("GLib version 1.2.0 or above is needed");
</programlisting>
</example>
</para>
@major: the major version number.
@minor: the minor version number.
@micro: the micro version number.
<!-- ##### MACRO G_DIR_SEPARATOR ##### -->
<para>
The directory separator character.

136
docs/reference/glib/tmpl/version.sgml Normal file
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@ -0,0 +1,136 @@
<!-- ##### SECTION Title ##### -->
Version Information
<!-- ##### SECTION Short_Description ##### -->
Variables and functions to check the GLib version
<!-- ##### SECTION Long_Description ##### -->
<para>
GLib provides version information, primarily useful in configure checks
for builds that have a configure script. Applications will not
typically use the features described here.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### VARIABLE glib_major_version ##### -->
<para>
The major version number of the GLib library.
(e.g. in GLib version 1.2.5 this is 1.)
</para>
<para>
This variable is in the library, so represents the
GLib library you have linked against. Contrast with the
#GLIB_MAJOR_VERSION macro, which represents the major version of the
GLib headers you have included.
</para>
<!-- ##### VARIABLE glib_minor_version ##### -->
<para>
The minor version number of the GLib library.
(e.g. in GLib version 1.2.5 this is 2.)
</para>
<para>
This variable is in the library, so represents the
GLib library you have linked against. Contrast with the
#GLIB_MINOR_VERSION macro, which represents the minor version of the
GLib headers you have included.
</para>
<!-- ##### VARIABLE glib_micro_version ##### -->
<para>
The micro version number of the GLib library.
(e.g. in GLib version 1.2.5 this is 5.)
</para>
<para>
This variable is in the library, so represents the GLib library you
have linked against. Contrast with the #GLIB_MICRO_VERSION macro, which
represents the micro version of the GLib headers you have included.
</para>
<!-- ##### VARIABLE glib_binary_age ##### -->
<para>
This is the binary age passed to <application>libtool</application>. If
<application>libtool</application> means nothing to you, don't worry
about it. ;-)
</para>
<!-- ##### VARIABLE glib_interface_age ##### -->
<para>
This is the interface age passed to <application>libtool</application>. If
<application>libtool</application> means nothing to you, don't worry
about it. ;-)
</para>
<!-- ##### FUNCTION glib_check_version ##### -->
<para>
</para>
@required_major:
@required_minor:
@required_micro:
@Returns:
<!-- ##### MACRO GLIB_MAJOR_VERSION ##### -->
<para>
The major version number of the GLib library.
Like #glib_major_version, but from the headers used at
application compile time, rather than from the library linked against
at application run time.
</para>
<!-- ##### MACRO GLIB_MINOR_VERSION ##### -->
<para>
The minor version number of the GLib library.
Like #gtk_minor_version, but from the headers used at
application compile time, rather than from the library linked against
at application run time.
</para>
<!-- ##### MACRO GLIB_MICRO_VERSION ##### -->
<para>
The micro version number of the GLib library.
Like #gtk_micro_version, but from the headers used at
application compile time, rather than from the library linked against
at application run time.
</para>
<!-- ##### MACRO GLIB_CHECK_VERSION ##### -->
<para>
Checks the version of the GLib library.
It returns %TRUE if the GLib library is the same or newer than the given
version.
<example>
<title>Checking the version of the GLib library</title>
<programlisting>
if (!GLIB_CHECK_VERSION (1, 2, 0))
g_error ("GLib version 1.2.0 or above is needed");
</programlisting>
</example>
</para>
@major: the major version number.
@minor: the minor version number.
@micro: the micro version number.

47
glib/gutils.c
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@ -96,6 +96,53 @@ const guint glib_micro_version = GLIB_MICRO_VERSION;
const guint glib_interface_age = GLIB_INTERFACE_AGE;
const guint glib_binary_age = GLIB_BINARY_AGE;
/**
* glib_check_version:
* @required_major: the required major version.
* @required_minor: the required major version.
* @required_micro: the required major version.
*
* Checks that the GLib library in use is compatible with the
* given version. Generally you would pass in the constants
* #GLIB_MAJOR_VERSION, #GLIB_MINOR_VERSION, #GLIB_MICRO_VERSION
* as the three arguments to this function; that produces
* a check that the library in use is compatible with
* the version of GLib the application or module was compiled
* against.
*
* Compatibility is defined by two things: first the version
* of the running library is newer than the version
* @required_major.required_minor.@required_micro. Second
* the running library must be binary compatible with the
* version @required_major.required_minor.@required_micro
* (same major version.)
*
* Return value: %NULL if the GLib library is compatible with the
* given version, or a string describing the version mismatch.
* The returned string is owned by GLib and must not be modified
* or freed.
*
* Since: 2.6
**/
const gchar *
glib_check_version (guint required_major,
guint required_minor,
guint required_micro)
{
gint glib_effective_micro = 100 * GLIB_MINOR_VERSION + GLIB_MICRO_VERSION;
gint required_effective_micro = 100 * required_minor + required_micro;
if (required_major > GLIB_MAJOR_VERSION)
return "GLib version too old (major mismatch)";
if (required_major < GLIB_MAJOR_VERSION)
return "GLib version too new (major mismatch)";
if (required_effective_micro < glib_effective_micro - GLIB_BINARY_AGE)
return "GLib version too new (micro mismatch)";
if (required_effective_micro > glib_effective_micro)
return "GLib version too old (micro mismatch)";
return NULL;
}
#if !defined (HAVE_MEMMOVE) && !defined (HAVE_WORKING_BCOPY)
void
g_memmove (gpointer dest, gconstpointer src, gulong len)

4
glib/gutils.h
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@ -325,6 +325,10 @@ GLIB_VAR const guint glib_micro_version;
GLIB_VAR const guint glib_interface_age;
GLIB_VAR const guint glib_binary_age;
const gchar * glib_check_version (guint required_major,
guint required_minor,
guint required_micro);
#define GLIB_CHECK_VERSION(major,minor,micro) \
(GLIB_MAJOR_VERSION > (major) || \
(GLIB_MAJOR_VERSION == (major) && GLIB_MINOR_VERSION > (minor)) || \