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102 lines
2.1 KiB
PHP
102 lines
2.1 KiB
PHP
<?php
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/*
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* CPHP is more free software. It is licensed under the WTFPL, which
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* allows you to do pretty much anything with it, without having to
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* ask permission. Commercial use is allowed, and no attribution is
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* required. We do politely request that you share your modifications
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* to benefit other developers, but you are under no enforced
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* obligation to do so :)
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*
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* Please read the accompanying LICENSE document for the full WTFPL
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* licensing text.
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*/
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$cphp_dependencies = array();
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$cphp_last_dependency = "";
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function cphp_dependency_provides($component, $version)
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{
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global $cphp_dependencies, $cphp_last_dependency;
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$cphp_dependencies[$component] = $version;
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$cphp_last_dependency = $component;
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}
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function cphp_dependency_requires($component, $version)
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{
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global $cphp_dependencies, $cphp_last_dependency;
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if(!isset($cphp_dependencies[$component]))
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{
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die("The {$cphp_last_dependency} component requires the {$component} component to be loaded, but this is not the case.");
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}
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$current_version = $cphp_dependencies[$component];
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if(!cphp_dependency_match($current_version, $version))
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{
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die("The {$cphp_last_dependency} component requires the {$component} component with version {$version} to be loaded, but an incompatible version ({$current_version}) was found.");
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}
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}
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function cphp_dependency_match($available, $required)
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{
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if(strpos($required, ",") !== false)
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{
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$ranges = explode(",", $required);
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}
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else
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{
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$ranges[] = $version;
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}
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foreach($ranges as $range)
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{
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if(strpos($required, "|") !== false)
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{
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list($min, $max) = explode("|", $range);
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$f_min = (float) $min;
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$f_max = (float) $max;
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$f_cur = (float) $available;
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if(empty($min) && empty($max))
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{
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return true;
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}
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elseif(empty($min))
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{
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if($f_cur < $f_max)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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elseif(empty($max))
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{
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if($f_cur > $f_min)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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else
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{
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if($f_cur > $f_min && $f_cur < $f_max)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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}
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}
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}
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