The stream_write() function is used to write to data to imgtool_streams.

Declared in src/mess/tools/imgtool/stream.h as

UINT32 stream_write(imgtool_stream *stream, const void *buf, UINT32 sz);

• stream – Pointer to the imgtool_stream where the data should be written.
• buf – Pointer to a buffer with the data.
• sz – Amount of bytes to write.

The number of bytes written to the stream.

bytes_written = stream_write(destf, buffer, bytes_left);

Writes bytes_left bytes from the buffer to the imgtool_stream destf. The actual amount of bytes that were written to the file is returned in the variable bytes_written.