buffer.h

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#pragma once
 
#include <cx/cx.h>
 
CX_C_BEGIN
 
 
 
struct BufferHeader {
    union {
        void* _is_buffer;
        size_t sz;   
    };
    size_t len;      
    uint8 data[];    
};
 
typedef struct BufIov {
    void* data;   
    size_t len;   
} BufIov;
 
_Ret_notnull_ Buffer bufCreate(size_t size);
 
_Must_inspect_result_ _Ret_maybenull_ Buffer bufTryCreate(size_t size);
 
_At_(*buf, _Pre_maybenull_ _Post_notnull_) void bufResize(_Inout_ Buffer* buf, size_t newsize);
 
_At_(*buf, _Pre_maybenull_) bool bufTryResize(_Inout_ Buffer* buf, size_t newsize);
 
_Pure _meta_inline size_t bufLen(_In_opt_ Buffer buf)
{
    return buf ? buf->len : 0;
}
 
_meta_inline void bufClear(_Inout_opt_ Buffer buf)
{
    if (buf)
        buf->len = 0;
}
 
_At_(*buf, _Pre_maybenull_ _Post_notnull_) _Ret_notnull_ uint8* bufReserve(_Inout_ Buffer* buf,
                                                                          size_t len);
 
_At_(*buf, _Pre_maybenull_ _Post_notnull_) void bufAppendBytes(_Inout_ Buffer* buf,
                                                               _In_reads_bytes_opt_(len)
                                                                   const void* data,
                                                               size_t len);
 
_At_(*buf, _Pre_maybenull_ _Post_notnull_) void bufAppend(_Inout_ Buffer* buf, _In_opt_ Buffer src);
 
_At_(*buf, _Pre_maybenull_) _At_(*src, _Pre_maybenull_ _Post_null_) void
bufAppendC(_Inout_ Buffer* buf, _Inout_ Buffer* src);
 
_At_(*buf, _Pre_maybenull_ _Post_null_) void bufDestroy(_Inout_ Buffer* buf);
 
 
CX_C_END