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Added support for native Win32 based on https://code.launchpad.net/~thepyper/libmodbus/win32-native This mainly affects the RTU implementation as the TCP/IP socket interface is the same thanks to the winsocks library. The interface for using the serial port is completely different on Win32 and is now implemented accordingly. Signed-off-by: Stéphane Raimbault <stephane.raimbault@gmail.com>
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Introduced the select() operation for backends as the WAIT_DATA macro approach is not very extensible and causes trouble when adding platform- specific codepaths. Signed-off-by: Stéphane Raimbault <stephane.raimbault@gmail.com>
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There are several header files that are already included in modbus.h and thus do not have to be included in the C files. Signed-off-by: Stéphane Raimbault <stephane.raimbault@gmail.com>
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The send() and recv() functions of the backends might require more information than just a file descriptor, therefore pass the complete modbus_t structure. Signed-off-by: Stéphane Raimbault <stephane.raimbault@gmail.com>
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All private functions and constants are now prefixed by _. The modbus protocol uses entry points to call specific functions.