MtFmt: inc/mm_io.h 源文件

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// SPDX-License-Identifier: LGPL-3.0
#if !defined(_INCLUDE_MM_IO_H_)
#define _INCLUDE_MM_IO_H_ 1
#include "mm_cfg.h"
#include "mm_result.h"
#include "mm_type.h"
 
typedef mstr_result_t (*MStrIOWrite)(
    void* ctx, const byte_t* data, usize_t len
);
 
typedef struct tagMStrIOCallback
{
    void* capture;
 
    MStrIOWrite io_write;
} MStrIOCallback;
 
MSTR_EXPORT_API(mstr_result_t)
mstr_io_init(void* context, MStrIOCallback* obj, MStrIOWrite cb_write);
 
MSTR_EXPORT_API(mstr_result_t)
mstr_ioformat(
    MStrIOCallback* io, const char* fmt, usize_t fmt_place, ...
);
 
MSTR_EXPORT_API(mstr_result_t)
mstr_iovformat(
    MStrIOCallback* io,
    const char* fmt,
    usize_t fmt_place,
    va_list* ap_ptr
);
 
MSTR_EXPORT_API(MStrIOCallback*) mstr_get_stdout(void);
 
#define MSTR_COUNT_VA_ARGS_HELPER( \
    _0,                            \
    _1,                            \
    _2,                            \
    _3,                            \
    _4,                            \
    _5,                            \
    _6,                            \
    _7,                            \
    _8,                            \
    _9,                            \
    _10,                           \
    _11,                           \
    _12,                           \
    _13,                           \
    _14,                           \
    _15,                           \
    _16,                           \
    N,                             \
    ...                            \
)                                  \
    N
 
#define MSTR_COUNT_VA_ARGS(...) \
    MSTR_COUNT_VA_ARGS_HELPER(  \
        0,                      \
        ##__VA_ARGS__,          \
        16,                     \
        15,                     \
        14,                     \
        13,                     \
        12,                     \
        11,                     \
        10,                     \
        9,                      \
        8,                      \
        7,                      \
        6,                      \
        5,                      \
        4,                      \
        3,                      \
        2,                      \
        1,                      \
        0                       \
    )
 
#if _MSTR_USE_STD_IO
#define mstr_print(fmt, ...)             \
    (mstr_ioformat(                      \
        mstr_get_stdout(),               \
        fmt,                             \
        MSTR_COUNT_VA_ARGS(__VA_ARGS__), \
        ##__VA_ARGS__                    \
    ))
#else
#define mstr_print(fmt, ...) ((void)(0))
#endif // _MSTR_USE_STD_IO
#endif // _INCLUDE_MM_IO_H_