get_stream_helper()

smplbuf_u8<32> b;
auto&& bs = b.get_stream_helper(); // helper object

// Generate data sequence
uint8_t FOURCHARS[]={'A', 'B', 'C', 'D'};
bs << FOURCHARS;
bs << ';';
bs << uint32_t(0x30313233); // "0123"
bs << format(";%d", 99);

Serial << b << crlf; // output to Serial via smplbuf_u8<32> class

// Result: ABCD;0123;99

Since the type name of the helper object can be long, it is resolved using auto&&. You can use interfaces defined by mwx::stream, such as the << operator, with this object.

The created helper object bs starts reading and writing from the head of the base array b. If at the end of the array, data is appended using append(). The position advances with each read/write operation.

The helper function supports the >> operator for reading.

// ...continued from the above example
// ABCD;0123;99 <- stored in b

// Variables to store read data
uint8_t FOURCHARS_READ[4];
uint32_t u32val_read;
uint8_t c_read[2];

// Read using >> operator
bs.rewind();                // rewind position to the start
bs >> FOURCHARS_READ;      // 4 characters
bs >> mwx::null_stream(1); // skip 1 character
bs >> u32val_read;         // 32-bit data
bs >> mwx::null_stream(1); // skip 1 character
bs >> c_read;              // 2 characters

// Display results
Serial << crlf << "4chars=" << FOURCHARS_READ;
Serial << crlf << format("32bit val=0x%08x", u32val_read);
Serial << crlf << "2chars=" << c_read;

// 4chars=ABCD
// 32bit val=0x30313233
// 2chars=99