bson_reader_read_func_t (3) Linux Manual Page
bson_reader_read_func_t – A callback function that will be called by bson_reader_t to read the next chunk of data from the underlying opaque file descriptor.
Synopsis
typedef ssize_t (*bson_reader_read_func_t) (void *handle,
void *buf,
size_t count);
Parameters
- handle
- The handle to read from.
- buf
- The buffer to read into.
- count
- The number of bytes to read.
Description
A callback function that will be called by bson_reader_t to read the next chunk of data from the underlying opaque file descriptor.This function is meant to operate similar to the read(2) function as part of libc on UNIX-like systems.
Returns
0 for end of stream.-1 for a failure on read.
A value greater than zero for the number of bytes read into buf \&.