mtlb_uint8

Description

Matlab and Scilab uint8 behave differently :

• Beyong the main interval bounds, Scilab's uint8() wraps, while Matlab's mtlb_uint8() saturates.
• For non integer values, Scilab's uint8() truncates the fractional part, while Matlab's mtlb_uint8() rounds to the nearest integer.

x	uint8(x)	mtlb_uint8(x)
%nan	0	0
-%inf	0	0
-2	254	0
-1	255	0
0	0	0
2	2	2
10.2	10	10
10.5	10	11
10.51	10	11
...	...	...
255	255	255
256	0	255
257	1	255
%inf	255	255

mtlb_uint8 has not to be used for hand coded functions. The function mtlb_uint8(A) is used by mfile2sci to replace uint8(A) when it is not possible to know what is the input while porting Matlab code to Scilab. This function then determines the correct semantic at run time.