/*
 * ModSecurity, http://www.modsecurity.org/
 * Copyright (c) 2015 - 2020 Trustwave Holdings, Inc. (http://www.trustwave.com/)
 *
 * You may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * If any of the files related to licensing are missing or if you have any
 * other questions related to licensing please contact Trustwave Holdings, Inc.
 * directly using the email address security@modsecurity.org.
 *
 */

#include "src/actions/transformations/compress_whitespace.h"

#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <cctype>
#include <locale>

#include "modsecurity/transaction.h"
#include "src/actions/transformations/transformation.h"


namespace modsecurity {
namespace actions {
namespace transformations {


void CompressWhitespace::execute(Transaction *t,
    ModSecString &in,
    ModSecString &out) {
    int inWhiteSpace = 0;
    size_t i = 0;
    out.reserve(in.size());

    while (i < in.size()) {
        if (isspace(in[i])) {
            if (inWhiteSpace) {
                i++;
                continue;
            } else {
                inWhiteSpace = 1;
                out.append(" ", 1);
            }
        } else {
            inWhiteSpace = 0;
            out.append(&in.at(i), 1);
        }
        i++;
    }
}


}  // namespace transformations
}  // namespace actions
}  // namespace modsecurity