#ifndef __SMCC_CORE_STREAM_H__
#define __SMCC_CORE_STREAM_H__

#include "core_impl.h"
#include "core_macro.h"
#include "core_mem.h"
#include "core_str.h"

struct core_stream;
typedef struct core_stream core_stream_t;

#define core_stream_eof (-1)

struct core_stream {
    cstring_t name;

    /// @brief 读取指定数量的字符到缓冲区
    usize (*read_buf)(core_stream_t *stream, char *buffer, usize count);

    /// @brief 获取下一个字符
    int (*peek_char)(core_stream_t *stream);

    /// @brief 重置字符流位置
    void (*reset_char)(core_stream_t *stream);

    /// @brief 读取并消费下一个字符（移动流位置）
    int (*next_char)(core_stream_t *stream);

    /// @brief 释放资源
    void (*free_stream)(core_stream_t *steam);
};

static inline usize core_stream_read_buf(core_stream_t *self, char *buffer,
                                         usize count) {
    return self->read_buf(self, buffer, count);
}

static inline int core_stream_peek_char(core_stream_t *self) {
    return self->peek_char(self);
}

static inline void core_stream_reset_char(core_stream_t *self) {
    self->reset_char(self);
}

static inline int core_stream_next_char(core_stream_t *self) {
    return self->next_char(self);
}

static inline void core_stream_free_stream(core_stream_t *self) {
    self->free_stream(self);
}

#ifndef __SMCC_CORE_NO_MEM_STREAM__
typedef struct core_mem_stream {
    core_stream_t stream;
    const char *data;
    usize data_length;
    usize curr_pos;
    usize peek_pos;
    cbool owned;
} core_mem_stream_t;
core_stream_t *core_mem_stream_init(core_mem_stream_t *stream, const char *data,
                                    usize length, cbool need_copy);
#endif

#endif /* __SMCC_CORE_STREAM_H__ */