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New logic of file.Read

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Pavel Kirienko
2015-05-16 16:07:52 +03:00
parent 12b35d0da9
commit 34200c18be
1 changed files with 10 additions and 6 deletions
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dsdl/uavcan/protocol/file/218.Read.uavcan
+10 -6
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@@ -1,11 +1,15 @@
#
# Read contents of the file from remote node.
# Empty data in response means that the offset is out of file boundaries.
# Non-empty data means the end of file is not reached yet, even if the length is less than maximum.
# Read file from a remote node.
#
# There are two possible outcomes of a successful service call:
# 1. Data array size equals its capacity. This means that the end of the file is not reached yet.
# 2. Data array size is less than its capacity, possibly zero. This means that the end of file is reached.
#
# Thus, if the client needs to fetch the entire file, it should repeatedly call this service while increasing the
# offset, until the empty data is returned.
# offset, until incomplete data is returned.
#
# If the object pointed by 'path' cannot be read (e.g. it is a directory or it does not exist), appropriate error code
# will be returned.
# will be returned, and data array will be empty.
#
uint32 offset
@@ -14,4 +18,4 @@ Path path
---
Error error
uint8[<=250] data
uint8[<=256] data