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| author | Denys Vlasenko | 2013-06-28 01:33:47 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2013-06-28 01:33:47 +0200 |
| commit | 26a7e2ecbf76db06cf0754a0664eaa68e3cae53a (patch) | |
| tree | a129e196bd1dfc8f40461064c08bb7b4e0533020 /networking/ping.c | |
| parent | 59f46676a9c03303809f40d1a27c4d2e9e640697 (diff) | |
| download | busybox-26a7e2ecbf76db06cf0754a0664eaa68e3cae53a.zip busybox-26a7e2ecbf76db06cf0754a0664eaa68e3cae53a.tar.gz | |
ping: code shrink
function old new delta
unpack_tail 262 243 -19
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/ping.c')
| -rw-r--r-- | networking/ping.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/networking/ping.c b/networking/ping.c index 8c08c80..f27e214 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -372,7 +372,7 @@ struct globals { struct sockaddr_in6 sin6; #endif } pingaddr; - char rcvd_tbl[MAX_DUP_CHK / 8]; + unsigned char rcvd_tbl[MAX_DUP_CHK / 8]; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define if_index (G.if_index ) @@ -402,13 +402,11 @@ void BUG_ping_globals_too_big(void); } while (0) -#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ -#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ -#define SET(bit) (A(bit) |= B(bit)) -#define CLR(bit) (A(bit) &= (~B(bit))) -#define TST(bit) (A(bit) & B(bit)) - -/**************************************************************************/ +#define BYTE(bit) rcvd_tbl[(bit)>>3] +#define MASK(bit) (1 << ((bit) & 7)) +#define SET(bit) (BYTE(bit) |= MASK(bit)) +#define CLR(bit) (BYTE(bit) &= (~MASK(bit))) +#define TST(bit) (BYTE(bit) & MASK(bit)) static void print_stats_and_exit(int junk) NORETURN; static void print_stats_and_exit(int junk UNUSED_PARAM) @@ -578,11 +576,10 @@ static void unpack_tail(int sz, uint32_t *tp, const char *from_str, uint16_t recv_seq, int ttl) { + unsigned char *b, m; const char *dupmsg = " (DUP!)"; unsigned triptime = triptime; /* for gcc */ - ++G.nreceived; - if (tp) { /* (int32_t) cast is for hypothetical 64-bit unsigned */ /* (doesn't hurt 32-bit real-world anyway) */ @@ -594,11 +591,15 @@ static void unpack_tail(int sz, uint32_t *tp, tmax = triptime; } - if (TST(recv_seq % MAX_DUP_CHK)) { + b = &BYTE(recv_seq % MAX_DUP_CHK); + m = MASK(recv_seq % MAX_DUP_CHK); + /*if TST(recv_seq % MAX_DUP_CHK):*/ + if (*b & m) { ++G.nrepeats; - --G.nreceived; } else { - SET(recv_seq % MAX_DUP_CHK); + /*SET(recv_seq % MAX_DUP_CHK):*/ + *b |= m; + ++G.nreceived; dupmsg += 7; } |