relay_file_read_start

Name:lay_file_read_start_pos - find the first available byte to read*@read_pos: file read position*@buf: relay channel buffer* If the @read_pos is in the middle of padding, return the* position of the first actually available byte, otherwise

Proto:static size_t relay_file_read_start_pos(size_t read_pos, struct rchan_buf *buf)

Type:size_t

Parameter:

Type	Parameter	Name
size_t	read_pos
struct rchan_buf *	buf

1073

subbuf_size = sub-buffer size

1074

n_subbufs = number of sub-buffers per buffer

1075

consumed = count of sub-buffers consumed % n_subbufs

1077

If Not read_pos Then read_pos = consumed * subbuf_size + ytes consumed in cur read subbuf

1079

read_subbuf = read_pos / subbuf_size

1080

padding = padding counts per sub-buffer [read_subbuf]

1081

padding_start = (read_subbuf + 1) * subbuf_size - padding

1082

padding_end = (read_subbuf + 1) * subbuf_size

1083

If read_pos >= padding_start && read_pos < padding_end Then

1084

read_subbuf = (read_subbuf + 1) % n_subbufs

1085

read_pos = read_subbuf * subbuf_size

1088

Return read_pos

**Caller**
Name	Describe
relay_file_read

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

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