apfl/src/resizable.h

#ifndef APFL_RESIZABLE
#define APFL_RESIZABLE 1

#include <stddef.h>
#include <stdbool.h>

#include "apfl.h"

// TODO: Find a way to make these functions safer. These functions require
// casting things to void** which hides useful compiler warnings. Also needing
// to pass in the correct elem_size is error prone.

#define APFL_RESIZABLE_TRAIT(T, N) \
    T* N;                          \
    size_t len;                    \
    size_t cap;

#define APFL_RESIZABLE_ARGS(S, N) (void **)(&(S).N), &(S).len, &(S).cap

void apfl_resizable_init(void **mem, size_t *len, size_t *cap);

bool apfl_resizable_resize(
    struct apfl_allocator,
    size_t elem_size,
    void **mem,
    size_t *len,
    size_t *cap,
    size_t newlen
);

bool apfl_resizable_ensure_cap(
    struct apfl_allocator,
    size_t elem_size,
    void **mem,
    size_t *cap,
    size_t want_cap
);

bool apfl_resizable_ensure_cap_for_more_elements(
    struct apfl_allocator,
    size_t elem_size,
    void **mem,
    size_t len,
    size_t *cap,
    size_t more_elements
);

bool apfl_resizable_check_cut_args(size_t len, size_t cut_start, size_t cut_len);

bool apfl_resizable_cut_without_resize(
    size_t elem_size,
    void **mem,
    size_t *len,
    size_t cut_start,
    size_t cut_len
);

bool apfl_resizable_splice(
    struct apfl_allocator,
    size_t elem_size,
    void **mem,
    size_t *len,
    size_t *cap,
    size_t start,
    size_t cut_len,
    const void *other_mem,
    size_t other_len
);

bool apfl_resizable_append(
    struct apfl_allocator,
    size_t elem_size,
    void **mem,
    size_t *len,
    size_t *cap,
    const void *other_mem,
    size_t other_len
);


#endif