diff options
Diffstat (limited to 'sync.c')
-rw-r--r-- | sync.c | 28 |
1 files changed, 12 insertions, 16 deletions
@@ -58,6 +58,13 @@ static struct Sync { } *synx; static int max_synx, nsynx; +static inline void swap_sync(uint32_t dst, uint32_t src) +{ + struct Sync t = synx[dst]; + synx[dst] = synx[src]; + synx[src] = t; +} + void init_sync(void) { max_synx = SYNC_MAX-1; @@ -79,12 +86,8 @@ void add_sync(uint32_t pos, uint32_t length) synx[nsynx].length = length; for (i = nsynx; i > 1; i /= 2) { - if (synx[i / 2].pos > synx[i].pos) { - struct Sync t; - t = synx[i / 2]; /* structure copy */ - synx[i / 2] = synx[i]; /* structure copy again */ - synx[i] = t; /* another structure copy */ - } + if (synx[i / 2].pos > synx[i].pos) + swap_sync(i / 2, i); } } @@ -92,11 +95,8 @@ uint32_t next_sync(uint32_t position, uint32_t *length) { while (nsynx > 0 && synx[1].pos + synx[1].length <= position) { int i, j; - struct Sync t; - t = synx[nsynx]; /* structure copy */ - synx[nsynx] = synx[1]; /* structure copy */ - synx[1] = t; /* ditto */ + swap_sync(nsynx, 1); nsynx--; i = 1; @@ -104,14 +104,10 @@ uint32_t next_sync(uint32_t position, uint32_t *length) j = i * 2; if (synx[j].pos < synx[i].pos && (j + 1 > nsynx || synx[j + 1].pos > synx[j].pos)) { - t = synx[j]; /* structure copy */ - synx[j] = synx[i]; /* lots of these... */ - synx[i] = t; /* ...aren't there? */ + swap_sync(j, i); i = j; } else if (j + 1 <= nsynx && synx[j + 1].pos < synx[i].pos) { - t = synx[j + 1]; /* structure copy */ - synx[j + 1] = synx[i]; /* structure <yawn> copy */ - synx[i] = t; /* structure copy <zzzz....> */ + swap_sync(j + 1, i); i = j + 1; } else break; |