Does a cheap sanity check that the `self.len` values in `buffer` are valid offsets (of type T) into some other buffer of `values_length` bytes long
(
&self,
values_length: usize,
)
| 1031 | /// Does a cheap sanity check that the `self.len` values in `buffer` are valid |
| 1032 | /// offsets (of type T) into some other buffer of `values_length` bytes long |
| 1033 | fn validate_offsets<T: ArrowNativeType + num_traits::Num + std::fmt::Display>( |
| 1034 | &self, |
| 1035 | values_length: usize, |
| 1036 | ) -> Result<(), ArrowError> { |
| 1037 | // Justification: buffer size was validated above |
| 1038 | let offsets = self.typed_offsets::<T>()?; |
| 1039 | if offsets.is_empty() { |
| 1040 | return Ok(()); |
| 1041 | } |
| 1042 | |
| 1043 | let first_offset = offsets[0].to_usize().ok_or_else(|| { |
| 1044 | ArrowError::InvalidArgumentError(format!( |
| 1045 | "Error converting offset[0] ({}) to usize for {}", |
| 1046 | offsets[0], self.data_type |
| 1047 | )) |
| 1048 | })?; |
| 1049 | |
| 1050 | let last_offset = offsets[self.len].to_usize().ok_or_else(|| { |
| 1051 | ArrowError::InvalidArgumentError(format!( |
| 1052 | "Error converting offset[{}] ({}) to usize for {}", |
| 1053 | self.len, offsets[self.len], self.data_type |
| 1054 | )) |
| 1055 | })?; |
| 1056 | |
| 1057 | if first_offset > values_length { |
| 1058 | return Err(ArrowError::InvalidArgumentError(format!( |
| 1059 | "First offset {} of {} is larger than values length {}", |
| 1060 | first_offset, self.data_type, values_length, |
| 1061 | ))); |
| 1062 | } |
| 1063 | |
| 1064 | if last_offset > values_length { |
| 1065 | return Err(ArrowError::InvalidArgumentError(format!( |
| 1066 | "Last offset {} of {} is larger than values length {}", |
| 1067 | last_offset, self.data_type, values_length, |
| 1068 | ))); |
| 1069 | } |
| 1070 | |
| 1071 | if first_offset > last_offset { |
| 1072 | return Err(ArrowError::InvalidArgumentError(format!( |
| 1073 | "First offset {} in {} is smaller than last offset {}", |
| 1074 | first_offset, self.data_type, last_offset, |
| 1075 | ))); |
| 1076 | } |
| 1077 | |
| 1078 | Ok(()) |
| 1079 | } |
| 1080 | |
| 1081 | /// Does a cheap sanity check that the `self.len` values in `buffer` are valid |
| 1082 | /// offsets and sizes (of type T) into some other buffer of `values_length` bytes long |