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author | root <root@lab2.panaceas.james.local> | 2014-11-02 18:17:44 +0000 |
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committer | root <root@lab2.panaceas.james.local> | 2014-11-02 18:17:44 +0000 |
commit | 12287ff0a55f929bf840dcb4780d3f77b862c434 (patch) | |
tree | 46632674f393249e7cd74eacd7a4da00ccec540f /src/ring.c | |
parent | 479e719a64d75374f00438498cf91ba2601a63f1 (diff) | |
download | stm32_usb_kvm-12287ff0a55f929bf840dcb4780d3f77b862c434.tar.gz stm32_usb_kvm-12287ff0a55f929bf840dcb4780d3f77b862c434.tar.bz2 stm32_usb_kvm-12287ff0a55f929bf840dcb4780d3f77b862c434.zip |
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Diffstat (limited to 'src/ring.c')
-rw-r--r-- | src/ring.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/src/ring.c b/src/ring.c deleted file mode 100644 index 4f38e44..0000000 --- a/src/ring.c +++ /dev/null @@ -1,61 +0,0 @@ -#include "project.h" - - -static inline size_t -ring_next (ring_t * r, size_t p) -{ - p++; - if (p >= r->size) - p -= r->size; - return p; -} - -void -ring_init (ring_t * r, uint8_t * buf, size_t len) -{ - r->data = buf; - r->size = len; - r->write = 0; - r->read = 0; -} - -int -ring_write_byte (ring_t * r, uint8_t c) -{ - size_t n = ring_next (r, r->write); - - if (n == r->read) - return -1; - - r->data[r->write] = c; - r->write = n; - - return 0; -} - - -int -ring_read_byte (ring_t * r, uint8_t * c) -{ - size_t n = ring_next (r, r->read); - - if (r->read == r->write) - return -1; - - *c = r->data[r->read]; - r->read = n; - - return 0; -} - -int -ring_write (ring_t * r, uint8_t * buf, size_t len) -{ - while (len--) - { - if (ring_write_byte (r, *(buf++))) - return -1; - } - - return 0; -} |