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/*
 * MessagePack for Python packing routine
 *
 * Copyright (C) 2009 Naoki INADA
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    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
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

#include <stddef.h>
#include <stdlib.h>
#include "sysdep.h"
#include <limits.h>
#include <string.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct msgpack_packer {
    char *buf;
    size_t length;
    size_t buf_size;
    bool use_bin_type;
} msgpack_packer;

typedef struct Packer Packer;

static inline int msgpack_pack_write(msgpack_packer* pk, const char *data, size_t l)
{
    char* buf = pk->buf;
    size_t bs = pk->buf_size;
    size_t len = pk->length;

    if (len + l > bs) {
        bs = (len + l) * 2;
        buf = (char*)PyMem_Realloc(buf, bs);
        if (!buf) {
            PyErr_NoMemory();
            return -1;
        }
    }
    memcpy(buf + len, data, l);
    len += l;

    pk->buf = buf;
    pk->buf_size = bs;
    pk->length = len;
    return 0;
}

#define msgpack_pack_append_buffer(user, buf, len) \
        return msgpack_pack_write(user, (const char*)buf, len)

#include "pack_template.h"

// return -2 when o is too long
static inline int
msgpack_pack_unicode(msgpack_packer *pk, PyObject *o, long long limit)
{
    assert(PyUnicode_Check(o));

    Py_ssize_t len;
    const char* buf = PyUnicode_AsUTF8AndSize(o, &len);
    if (buf == NULL)
        return -1;

    if (len > limit) {
        return -2;
    }

    int ret = msgpack_pack_raw(pk, len);
    if (ret) return ret;

    return msgpack_pack_raw_body(pk, buf, len);
}

#ifdef __cplusplus
}
#endif