From 0b60f71cb853b35e53d0b407493dbcfc098ed40e Mon Sep 17 00:00:00 2001
From: tobigun <tobigun@b956fd51-792f-4845-bead-9b4dfca2ff2c>
Date: Tue, 19 Oct 2010 16:39:31 +0000
Subject: initial commit

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2684 b956fd51-792f-4845-bead-9b4dfca2ff2c
---
 mediaplugin/dists/autogen/m4/ax_extract_version.m4 | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 mediaplugin/dists/autogen/m4/ax_extract_version.m4

(limited to 'mediaplugin/dists/autogen/m4/ax_extract_version.m4')

diff --git a/mediaplugin/dists/autogen/m4/ax_extract_version.m4 b/mediaplugin/dists/autogen/m4/ax_extract_version.m4
new file mode 100644
index 00000000..c514e3c3
--- /dev/null
+++ b/mediaplugin/dists/autogen/m4/ax_extract_version.m4
@@ -0,0 +1,58 @@
+# This file is part of UltraStar Deluxe
+# Created by the UltraStar Deluxe Team
+
+# SYNOPSIS
+#
+#   AX_EXTRACT_VERSION(VARIABLE_PREFIX, VERSION)
+#
+# DESCRIPTION
+#
+#   Splits a version number ("major.minor.release") into its components.
+#   The resulting components of the version are guaranteed to be
+#   numeric. All non-numeric chars are removed.
+#
+# Sets
+#   [$VARIABLE_PREFIX]_VERSION_MAJOR
+#   [$VARIABLE_PREFIX]_VERSION_MINOR
+#   [$VARIABLE_PREFIX]_VERSION_RELEASE
+#
+# This function calls
+#   AC_SUBST([$VARIABLE_PREFIX]_VERSION_type] for each type
+
+AC_DEFUN([AX_EXTRACT_VERSION],
+[
+    version=[$2]    
+
+    # strip leading non-numeric tokens 
+    # (necessary for some ffmpeg-packages in ubuntu)
+    # example: 0d.51.1.0 -> 51.1.0
+    version=`echo $version | sed 's/^[[^.]]*[[^0-9.]][[^.]]*\.//'`
+
+    # replace "." and "-" with " " and ignore trailing tokens.
+    # 1.23.4-r2 will be splitted to [maj=1, min=23, rel=4].
+    # In addition we delete everything after the first character 
+    # which is not 0-9.
+    # 1.3a4-r32 will be [maj=1, min=3, rel=0].
+    read major minor release ignore <<eof
+        `echo $version | tr '.-' ' ' | sed 's/[[^0-9\ ]].*//'` 
+eof
+    # Note: Do NOT indent the eof-delimiter
+    # We use a here-document (<<< here-strings not POSIX compatible)
+
+    test -z $major && major=0
+    test -z $minor && minor=0
+    test -z $release && release=0
+
+    # strip preceding 0s and set unset version-parts to 0
+    [$1][_VERSION_MAJOR]=$(($major))
+    [$1][_VERSION_MINOR]=$(($minor))
+    [$1][_VERSION_RELEASE]=$(($release))
+    # integer representation: MMMmmmrrr (M:major,m:minor,r:release)
+    # can be used if pkg-config's comparison fails
+    [$1][_VERSION_INT]=$(($[$1][_VERSION_MAJOR]*1000000+$[$1][_VERSION_MINOR]*1000+$[$1][_VERSION_RELEASE]))
+
+    AC_SUBST([$1][_VERSION_MAJOR])
+    AC_SUBST([$1][_VERSION_MINOR])
+    AC_SUBST([$1][_VERSION_RELEASE])
+    AC_SUBST([$1][_VERSION_INT])
+])
-- 
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