Да, сука, да! ‰ cat cbuf.h cbuf.c #ifndef __CBUF_H__ #define __CBUF_H__ #include <stdint.h> typedef struct { uint8_t *buf; uint16_t head, tail, len; } cbuf_t; void cbuf_init(cbuf_t *cbuf, uint8_t *buf, unsigned len); unsigned cbuf_read(cbuf_t *cbuf, uint8_t *buf, unsigned count); unsigned cbuf_write(cbuf_t *cbuf, const uint8_t *buf, unsigned count); #endif #include <stdint.h> #include "cbuf.h" void cbuf_init(cbuf_t *cbuf, uint8_t *buf, unsigned len) { cbuf->buf = buf; cbuf->head = 0; cbuf->tail = 0; cbuf->len = len; } unsigned cbuf_read(cbuf_t *cbuf, uint8_t *buf, unsigned count) { unsigned i; for (i = 0; i < count; ++i) { if (cbuf->tail == cbuf->head) { break; } buf[i] = cbuf->buf[cbuf->tail]; cbuf->tail = (cbuf->tail + 1) % cbuf->len; } return i; } unsigned cbuf_write(cbuf_t *cbuf, const uint8_t *buf, unsigned count) { for (unsigned i = 0; i < count; ++i) { cbuf->buf[cbuf->head] = buf[i]; cbuf->head = (cbuf->head + 1) % cbuf->len; } return count; }