diff options
Diffstat (limited to 'vendor/jonahgeorge/jaeger-client-php/src/Jaeger/Codec/CodecUtility.php')
-rw-r--r-- | vendor/jonahgeorge/jaeger-client-php/src/Jaeger/Codec/CodecUtility.php | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/vendor/jonahgeorge/jaeger-client-php/src/Jaeger/Codec/CodecUtility.php b/vendor/jonahgeorge/jaeger-client-php/src/Jaeger/Codec/CodecUtility.php new file mode 100644 index 000000000..eb86a1cde --- /dev/null +++ b/vendor/jonahgeorge/jaeger-client-php/src/Jaeger/Codec/CodecUtility.php @@ -0,0 +1,41 @@ +<?php + +namespace Jaeger\Codec; + +class CodecUtility +{ + + /** + * Incoming trace/span IDs are hex representations of 64-bit values. PHP + * represents ints internally as signed 32- or 64-bit values, but base_convert + * converts to string representations of arbitrarily large positive numbers. + * This means at least half the incoming IDs will be larger than PHP_INT_MAX. + * + * Thrift, while building a binary representation of the IDs, performs bitwise + * operations on the string values, implicitly casting to int and capping them + * at PHP_INT_MAX. So, incoming IDs larger than PHP_INT_MAX will be serialized + * and sent to the agent as PHP_INT_MAX, breaking trace/span correlation. + * + * This method therefore, on 64-bit architectures, splits the hex string into + * high and low values, converts them separately to ints, and manually combines + * them into a proper signed int. This int is then handled properly by the + * Thrift package. + * + * On 32-bit architectures, it falls back to base_convert. + * + * @param string $hex + * @return string|int + */ + public static function hexToInt64($hex) + { + // If we're on a 32-bit architecture, fall back to base_convert. + if (PHP_INT_SIZE === 4) { + return base_convert($hex, 16, 10); + } + + $hi = intval(substr($hex, -16, -8), 16); + $lo = intval(substr($hex, -8, 8), 16); + + return $hi << 32 | $lo; + } +} |