#ifndef _LIBINPUT_INPUT_GAPBUFFER_H
#define _LIBINPUT_INPUT_GAPBUFFER_H

#include <stddef.h>

struct in_gb {
  char* buffer;
  size_t size;
  size_t gap_start;
  size_t gap_end;
};

typedef void* (*in_gb_malloc_func_t) (void*, size_t);

typedef void* (*in_gb_realloc_func_t) (void*, void*, size_t, size_t);

typedef void (*in_gb_free_func_t) (void*, void*);

void in_gb_init (in_gb_malloc_func_t mallocfn, void* ctx, struct in_gb* gb, size_t capacity);

void in_gb_fini (in_gb_free_func_t freefn, void* ctx, struct in_gb* gb);

void in_gb_move (struct in_gb* gb, size_t pos);

void in_gb_insert (in_gb_realloc_func_t reallocfn, void* ctx, struct in_gb* gb, char c);

void in_gb_backspace (struct in_gb* gb);

void in_gb_grow (in_gb_realloc_func_t reallocfn, void* ctx, struct in_gb* gb);

size_t in_gb_length (struct in_gb* gb);

char* in_gb_string_at (in_gb_malloc_func_t mallocfn, void* ctx, struct in_gb* gb, size_t pos);

void in_gb_concat (in_gb_realloc_func_t reallocfn, void* ctx, struct in_gb* dest,
                   struct in_gb* src);

#endif // _LIBINPUT_INPUT_GAPBUFFER_H