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Don't memmove the buffer content unless it's needed

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Nils O. Selåsdal
2013-07-12 20:27:31 +02:00
parent b475fae56b
commit b6bd7fcaa6
1 changed files with 6 additions and 2 deletions
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src/dbuf.c
+6 -2
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@@ -50,7 +50,10 @@ uc_dbuf_ensure(DBuf *buf, size_t capacity)
return 0; return 0;
len = uc_dbuf_len(buf); len = uc_dbuf_len(buf);
sz = buf->start - buf->bufstart; sz = buf->start - buf->bufstart;
memmove(buf->bufstart, buf->start, len);
if (buf->bufstart != buf->start)
memmove(buf->bufstart, buf->start, len);
if (sz + remaining < capacity) { if (sz + remaining < capacity) {
size_t newlen = uc_dbuf_buflen(buf) + capacity; size_t newlen = uc_dbuf_buflen(buf) + capacity;
void *tmp = realloc(buf->bufstart, newlen); void *tmp = realloc(buf->bufstart, newlen);
@@ -75,7 +78,8 @@ uc_dbuf_trim(DBuf *buf)
if (len == 0) if (len == 0)
return; return;
memmove(buf->bufstart, buf->start, len); if (buf->bufstart != buf->start)
memmove(buf->bufstart, buf->start, len);
tmp = realloc(buf->bufstart, len); tmp = realloc(buf->bufstart, len);
if (tmp != NULL) if (tmp != NULL)