diff options
Diffstat (limited to 'lib/erl_interface/src/encode/encode_binary.c')
-rw-r--r-- | lib/erl_interface/src/encode/encode_binary.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/erl_interface/src/encode/encode_binary.c b/lib/erl_interface/src/encode/encode_binary.c index 4471c51769..4aa9f6bc16 100644 --- a/lib/erl_interface/src/encode/encode_binary.c +++ b/lib/erl_interface/src/encode/encode_binary.c @@ -40,3 +40,27 @@ int ei_encode_binary(char *buf, int *index, const void *p, long len) return 0; } +int ei_encode_bitstring(char *buf, int *index, const void *p, size_t bits) +{ + char *s = buf + *index; + char *s0 = s; + size_t bytes = (bits + 7) / 8; + char last_bits = bits % 8; + + if (bytes == 0 || last_bits == 0) + return ei_encode_binary(buf, index, p, bytes); + + if (!buf) s += 6; + else { + put8(s, ERL_BIT_BINARY_EXT); + put32be(s, bytes); + put8(s, last_bits); + memcpy(s, p, bytes); + s[bytes-1] &= (0xff << (8-last_bits)); + } + s += bytes; + + *index += s-s0; + + return 0; +} |