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Standard library header <stdmchar.h> (C29)

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C
Standard Library headers

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本部分内容尚不完整
原因：7.25 文本转码工具 <stdmchar.h>

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概要 

#define __STDC_VERSION_STDMCHAR_H__ 202900L // 202ymmL
typedef /* 详见描述 */ char16_t;
typedef /* 详见描述 */ char32_t;
typedef /* 详见描述 */ char8_t;
typedef /* 详见描述 */ mbstate_t;
typedef /* 详见描述 */ size_t;
typedef /* 详见描述 */ stdc_mcerr;
typedef /* 详见描述 */ wchar_t;
#define MB_UTF16     /* 详见描述 */
#define MB_UTF32     /* 详见描述 */
#define MB_UTF8      /* 详见描述 */
#define STDC_C16_MAX /* 详见描述 */
#define STDC_C32_MAX /* 详见描述 */
#define STDC_C8_MAX  /* 详见描述 */
#define STDC_MC_MAX  /* 详见描述 */
#define STDC_MWC_MAX /* 详见描述 */
#define WCHAR_MAX    /* 详见描述 */
#define WCHAR_MIN    /* 详见描述 */
#define WCHAR_UTF16  /* 详见描述 */
#define WCHAR_UTF32  /* 详见描述 */
#define WCHAR_UTF8   /* 详见描述 */
#define WCHAR_WIDTH  /* 详见描述 */
enum stdc_mcerr
{
    stdc_mcerr_ok = 0
    stdc_mcerr_invalid = -1,
    stdc_mcerr_incomplete_input = -2,
    stdc_mcerr_insufficient_output = -3
};
stdc_mcerr stdc_mcnrtomcn(size_t* restrict output_size,
                          char* restrict* restrict output,
                          size_t* restrict input_size,
                          const char* restrict* restrict input,
                          mbstate_t* restrict state);
stdc_mcerr stdc_mcnrtomwcn(size_t* restrict output_size,
                           wchar_t* restrict* restrict output,
                           size_t* restrict input_size,
                           const char* restrict* restrict input,
                           mbstate_t* restrict state);
stdc_mcerr stdc_mcnrtoc8n(size_t* restrict output_size,
                          char8_t* restrict* restrict output,
                          size_t* restrict input_size,
                          const char* restrict* restrict input,
                          mbstate_t* restrict state);
stdc_mcerr stdc_mcnrtoc16n(size_t* restrict output_size,
                           char16_t* restrict* restrict output,
                           size_t* restrict input_size,
                           const char* restrict* restrict input,
                           mbstate_t* restrict state);
stdc_mcerr stdc_mcnrtoc32n(size_t* restrict output_size,
                           char32_t* restrict* restrict output,
                           size_t* restrict input_size,
                           const char* restrict* restrict input,
                           mbstate_t* restrict state);
stdc_mcerr stdc_mwcnrtomcn(size_t* restrict output_size,
                           char* restrict* restrict output,
                           size_t* restrict input_size,
                           wchar_t* restrict* restrict input,
                           mbstate_t* restrict state);
stdc_mcerr stdc_mwcnrtomwcn(size_t* restrict output_size,
                            wchar_t* restrict* restrict output,
                            size_t* restrict input_size,
                            wchar_t* restrict* restrict input,
                            mbstate_t* restrict state);
stdc_mcerr stdc_mwcnrtoc8n(size_t* restrict output_size,
                           char8_t* restrict* restrict output,
                           size_t* restrict input_size,
                           wchar_t* restrict* restrict input,
                           mbstate_t* restrict state);
stdc_mcerr stdc_mwcnrtoc16n(size_t* restrict output_size,
                            char16_t* restrict* restrict output,
                            size_t* restrict input_size,
                            wchar_t* restrict* restrict input,
                            mbstate_t* restrict state);
stdc_mcerr stdc_mwcnrtoc32n(size_t* restrict output_size,
                            char32_t* restrict* restrict output,
                            size_t* restrict input_size,
                            wchar_t* restrict* restrict input,
                            mbstate_t* restrict state);
stdc_mcerr stdc_c8nrtomcn(size_t* restrict output_size,
                          char* restrict* restrict