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[cycript.git] / sig / copy.cpp

/* Cycript - Inlining/Optimizing JavaScript Compiler
 * Copyright (C) 2009  Jay Freeman (saurik)
*/

/* Modified BSD License {{{ */
/*
 *        Redistribution and use in source and binary
 * forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer in the documentation
 *    and/or other materials provided with the
 *    distribution.
 * 3. The name of the author may not be used to endorse
 *    or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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*/
/* }}} */

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <apr_strings.h>
#include "Pooling.hpp"
#include "sig/parse.hpp"
#include <ffi.h>

namespace sig {

void Copy(apr_pool_t *pool, Element &lhs, Element &rhs) {
    lhs.name = apr_pstrdup(pool, rhs.name);
    if (rhs.type == NULL)
        lhs.type = NULL;
    else {
        lhs.type = new(pool) Type;
        Copy(pool, *lhs.type, *rhs.type);
    }
    lhs.offset = rhs.offset;
}

void Copy(apr_pool_t *pool, Signature &lhs, Signature &rhs) {
    size_t count(rhs.count);
    lhs.count = count;
    lhs.elements = new(pool) Element[count];
    for (size_t index(0); index != count; ++index)
        Copy(pool, lhs.elements[index], rhs.elements[index]);
}

void Copy(apr_pool_t *pool, Type &lhs, Type &rhs) {
    lhs.primitive = rhs.primitive;
    lhs.name = apr_pstrdup(pool, rhs.name);
    lhs.flags = rhs.flags;

    if (sig::IsAggregate(rhs.primitive))
        Copy(pool, lhs.data.signature, rhs.data.signature);
    else {
        sig::Type *&lht(lhs.data.data.type);
        sig::Type *&rht(rhs.data.data.type);

        if (rht == NULL)
            lht = NULL;
        else {
            lht = new(pool) Type;
            Copy(pool, *lht, *rht);
        }

        lhs.data.data.size = rhs.data.data.size;
    }
}

void Copy(apr_pool_t *pool, ffi_type &lhs, ffi_type &rhs) {
    lhs.size = rhs.size;
    lhs.alignment = rhs.alignment;
    lhs.type = rhs.type;
    if (rhs.elements == NULL)
        lhs.elements = NULL;
    else {
        size_t count(0);
        while (rhs.elements[count] != NULL)
            ++count;

        lhs.elements = new(pool) ffi_type *[count + 1];
        lhs.elements[count] = NULL;

        for (size_t index(0); index != count; ++index) {
            // XXX: if these are libffi native then you can just take them
            ffi_type *ffi(new(pool) ffi_type);
            lhs.elements[index] = ffi;
            sig::Copy(pool, *ffi, *rhs.elements[index]);
        }
    }
}

}