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#ifndef LIQUID_C_BUFFER_H
#define LIQUID_C_BUFFER_H
#include <ruby.h>
typedef struct c_buffer {
uint8_t *data;
uint8_t *data_end;
uint8_t *capacity_end;
} c_buffer_t;
static inline c_buffer_t c_buffer_init(void)
{
return (c_buffer_t) { NULL, NULL, NULL };
}
static inline c_buffer_t c_buffer_allocate(size_t capacity)
{
uint8_t *data = xmalloc(capacity);
return (c_buffer_t) { data, data, data + capacity };
}
static inline void c_buffer_free(c_buffer_t *buffer)
{
xfree(buffer->data);
}
static inline void c_buffer_reset(c_buffer_t *buffer)
{
buffer->data_end = buffer->data;
}
static inline size_t c_buffer_size(const c_buffer_t *buffer)
{
return buffer->data_end - buffer->data;
}
static inline size_t c_buffer_capacity(const c_buffer_t *buffer)
{
return buffer->capacity_end - buffer->data;
}
void c_buffer_zero_pad_for_alignment(c_buffer_t *buffer, size_t alignment);
void c_buffer_reserve_for_write(c_buffer_t *buffer, size_t write_size);
void c_buffer_write(c_buffer_t *buffer, void *data, size_t size);
static inline void *c_buffer_extend_for_write(c_buffer_t *buffer, size_t write_size) {
c_buffer_reserve_for_write(buffer, write_size);
void *write_ptr = buffer->data_end;
buffer->data_end += write_size;
return write_ptr;
}
static inline void c_buffer_write_byte(c_buffer_t *buffer, uint8_t byte) {
c_buffer_write(buffer, &byte, 1);
}
static inline void c_buffer_write_ruby_value(c_buffer_t *buffer, VALUE value) {
c_buffer_write(buffer, &value, sizeof(VALUE));
}
static inline void c_buffer_rb_gc_mark(c_buffer_t *buffer)
{
VALUE *buffer_end = (VALUE *)buffer->data_end;
for (VALUE *obj_ptr = (VALUE *)buffer->data; obj_ptr < buffer_end; obj_ptr++) {
rb_gc_mark(*obj_ptr);
}
}
static inline void c_buffer_concat(c_buffer_t *dest, c_buffer_t *src)
{
c_buffer_write(dest, src->data, c_buffer_size(src));
}
#endif
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