#ifndef STRING_BUFFER_H
#define STRING_BUFFER_H

#include <stddef.h>

/* "move" underlying contents of buffer to str shrinking it */
/* TODO: handle realloc fail */
#define SB_MOVE(buffer, str) do { \
    buffer->capacity = buffer->size + 1; \
    buffer->buf = realloc(buffer->buf, buffer->capacity); \
    buffer->buf[buffer->size++] = '\0'; \
    str = buffer->buf; \
} while (0)

typedef struct {
    char *buf;
    size_t size, capacity;
} StringBuffer;

void sb_add_char(StringBuffer *buffer, char c);
void sb_add_string(StringBuffer *buffer, const char *str);

size_t sb_length(const StringBuffer *buffer);

void sb_to_c_str(const StringBuffer *buffer, char *str);

void sb_init_empty(StringBuffer *buffer);

void sb_free(StringBuffer *buffer);

#endif /* STRING_BUFFER_H */