impl_buffer.h

 
#ifndef CCC_IMPL_BUFFER_H
#define CCC_IMPL_BUFFER_H
 
#include <assert.h>
#include <stddef.h>
#include "../types.h"
 
/* NOLINTBEGIN(readability-identifier-naming) */
 
struct ccc_buffer
{
    void *mem;
    size_t count;
    size_t capacity;
    size_t sizeof_type;
    ccc_any_alloc_fn *alloc;
    void *aux;
};
 
#define IMPL_BUF_NON_IMPL_BUF_DEFAULT_SIZE(...) __VA_ARGS__
#define IMPL_BUF_DEFAULT_SIZE(...) 0
#define IMPL_BUF_OPTIONAL_SIZE(...)                                            \
    __VA_OPT__(IMPL_BUF_NON_)##IMPL_BUF_DEFAULT_SIZE(__VA_ARGS__)
 
#define ccc_impl_buf_init(impl_mem, impl_alloc_fn, impl_aux_data,              \
                          impl_capacity, ...)                                  \
    {                                                                          \
        .mem = (impl_mem),                                                     \
        .sizeof_type = sizeof(*(impl_mem)),                                    \
        .count = IMPL_BUF_OPTIONAL_SIZE(__VA_ARGS__),                          \
        .capacity = (impl_capacity),                                           \
        .alloc = (impl_alloc_fn),                                              \
        .aux = (impl_aux_data),                                                \
    }
 
#define ccc_impl_buf_emplace(buf_ptr, index, type_initializer...)              \
    (__extension__({                                                           \
        typeof(type_initializer) *impl_buf_res = NULL;                         \
        __auto_type impl_i = (index);                                          \
        __auto_type impl_emplace_buff_ptr = (buf_ptr);                         \
        impl_buf_res = ccc_buf_at(impl_emplace_buff_ptr, index);               \
        if (impl_buf_res)                                                      \
        {                                                                      \
            *impl_buf_res = type_initializer;                                  \
        }                                                                      \
        impl_buf_res;                                                          \
    }))
 
#define ccc_impl_buf_emplace_back(buf_ptr, type_initializer...)                \
    (__extension__({                                                           \
        typeof(type_initializer) *impl_buf_res = NULL;                         \
        __auto_type impl_emplace_back_buf_ptr = (buf_ptr);                     \
        assert(sizeof(typeof(*impl_buf_res))                                   \
               == ccc_buf_sizeof_type(impl_emplace_back_buf_ptr));             \
        impl_buf_res = ccc_buf_alloc_back((impl_emplace_back_buf_ptr));        \
        if (impl_buf_res)                                                      \
        {                                                                      \
            *impl_buf_res = type_initializer;                                  \
        }                                                                      \
        impl_buf_res;                                                          \
    }))
 
/* NOLINTEND(readability-identifier-naming) */
 
#endif /* CCC_IMPL_BUF_H */