root/ext/pdo_mysql/get_error_codes.php

<?php
        $codes = array();
        $maxlen = 0;

        while (!feof(STDIN)) {
                $line = fgets(STDIN);

                if (ereg('^\{[[:space:]]+(ER_.*)[[:space:]]+,[[:space:]]*"(.*)",[[:space:]]*"(.*)"', $line, $matches)) {
                        $codes[$matches[1]] = $matches[2];
                        $maxlen = max($maxlen, strlen($matches[1]));
                }
        }

        if (empty($codes)) {
                fputs(STDERR, "input doesn't look like a MySQL sql_state.h file\n");
                exit(3);
        }
        
        echo "/* DO NOT EDIT THIS FILE!!! It is auto generated by get_error_codes.php */\n";
        foreach ($codes as $code => $state) {
                echo "#ifdef $code\n";
                printf("  case %-{$maxlen}s: return \"%s\";\n", $code, $state);
                echo "#endif\n";
        }

        
?>