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+/*
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+ * Copyright (c) 2022 OpenLuat & AirM2M
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
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+ * this software and associated documentation files (the "Software"), to deal in
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+ * the Software without restriction, including without limitation the rights to
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+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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+ * the Software, and to permit persons to whom the Software is furnished to do so,
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+ * subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in all
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+ * copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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+ */
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+
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+#ifndef LUAT_ICONV_H
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+#define LUAT_ICONV_H
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+
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+#include "luat_base.h"
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+
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+/**
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+ * @defgroup luatos_iconv 字符编码转换接口
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+ * @{
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+ */
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+typedef void *luat_iconv_t;
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+
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+/**
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+ * @brief 开启iconv转换流，分配内存
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+ * @param to_code 目标编码格式，gb2312/ucs2/ucs2be/utf8
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+ * @param from_code 源编码格式，gb2312/ucs2/ucs2be/utf8
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+ * @return cionv转换流
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+ */
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+luat_iconv_t luat_iconv_open (const char *to_code, const char *from_code);
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+
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+/**
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+ * @brief 转换编码格式
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+ * @param cd cionv转换流
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+ * @param inbuf 输入缓冲区
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+ * @param in_bytes_left 输入缓冲区长度
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+ * @param outbuf 输出缓冲区
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+ * @param out_bytes_left 输出缓冲区长度
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+ * @return 0为成功，-1为失败
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+ */
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+size_t luat_iconv_convert (luat_iconv_t cd, char ** inbuf, size_t * in_bytes_left, char ** outbuf, size_t * out_bytes_left);
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+
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+/**
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+ * @brief 关闭iconv转换流，释放内存
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+ * @param cd cionv转换流
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+ * @return 1成功，0失败
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+ */
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+int luat_iconv_close (luat_iconv_t cd);
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+
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+/**@}*/
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+
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+#endif
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