diff options
| author | Michael Mann <mmann78@netscape.net> | 2017-09-23 09:05:21 -0400 |
|---|---|---|
| committer | Michael Mann <mmann78@netscape.net> | 2017-10-09 11:31:19 +0000 |
| commit | d8d60b4980882e37b73df3bfead8c2b09daba091 (patch) | |
| tree | c41c195ce3971a71e8afea965740a7e87bf54609 /epan/tvbuff.c | |
| parent | c6a0e2a7916a689dfb642b004d07f6fc76fd04f3 (diff) | |
Add ENC_VARINT_PROTOBUF
Encoding of integer datatypes of Protocol buffers
https://developers.google.cn/protocol-buffers/docs/encoding
Change-Id: I9f6d65ddca099c15c0634984e9394131f98d35a9
Reviewed-on: https://code.wireshark.org/review/23813
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Diffstat (limited to 'epan/tvbuff.c')
| -rw-r--r-- | epan/tvbuff.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/epan/tvbuff.c b/epan/tvbuff.c index af7a6e7bf0..6693a88fef 100644 --- a/epan/tvbuff.c +++ b/epan/tvbuff.c @@ -3648,6 +3648,26 @@ tvb_get_ds_tvb(tvbuff_t *tvb) return(tvb->ds_tvb); } +guint +tvb_get_varint(tvbuff_t *tvb, guint offset, guint maxlen, guint64 *value) +{ + guint i; + guint64 b; /* current byte */ + *value = 0; + + for (i = 0; ((i < FT_VARINT_MAX_LEN) && (i < maxlen)); ++i) { + b = tvb_get_guint8(tvb, offset++); + *value |= ((b & 0x7F) << (i * 7)); /* add lower 7 bits to val */ + + if (b < 0x80) { + /* end successfully becauseof last byte's msb(most significant bit) is zero */ + return i + 1; + } + } + + return 0; /* 10 bytes scanned, but no bytes' msb is zero */ +} + /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * |