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- Jun 25, 2009
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Hi, i'm working on a algorithm that will do Run-Length data compression. This is what i'm doing: i initialize a matrix and tranform it in a vector and, while doing that, i discover what will be the size of the compressed new vector. Then i try to declare another vector with that size.
Look a small abstract of the algorithm:
PROCESS
TYPE line IS ARRAY (0 TO 3) OF INTEGER;
TYPE matrix IS ARRAY (0 TO 3) OF linha;
variable mat : matrix;
BEGIN
mat := ( (100, 99, 95, 94),
( 98, 96, 93, 0),
( 97, 92, 0, 0),
( 91, 0, 0, 0));
-- THIS IS WHERE THE VECTOR (100, 99,98,97,96,95,94,93,92,91,0,0,0,0,0,0) IS CREATED AND VECTOR_SIZE IS FOUND OUT.
PROCESS
TYPE comp IS ARRAY (0 TO VECTOR_SIZE) OF INTEGER;
variable COMPRESSED_VECTOR : comp;
-- THIS IS WHERE THE VECTOR IS USED TO CREATE THE COMPRESSED VECTOR. THE PROBLEM IS QUARTUS WON'T LET ME CREATE AN ARRAY USING A VARIABLE (0 TO VECTOR_SIZE), IT NEED TO BE A CONSTANT.
VECTOR_SIZE IS A SHARED VARIABLE AND I WAS THINKING ABOUT CONVERTING IT TO A CONSTANT, IF THAT'S POSSIBLE
Look a small abstract of the algorithm:
PROCESS
TYPE line IS ARRAY (0 TO 3) OF INTEGER;
TYPE matrix IS ARRAY (0 TO 3) OF linha;
variable mat : matrix;
BEGIN
mat := ( (100, 99, 95, 94),
( 98, 96, 93, 0),
( 97, 92, 0, 0),
( 91, 0, 0, 0));
-- THIS IS WHERE THE VECTOR (100, 99,98,97,96,95,94,93,92,91,0,0,0,0,0,0) IS CREATED AND VECTOR_SIZE IS FOUND OUT.
PROCESS
TYPE comp IS ARRAY (0 TO VECTOR_SIZE) OF INTEGER;
variable COMPRESSED_VECTOR : comp;
-- THIS IS WHERE THE VECTOR IS USED TO CREATE THE COMPRESSED VECTOR. THE PROBLEM IS QUARTUS WON'T LET ME CREATE AN ARRAY USING A VARIABLE (0 TO VECTOR_SIZE), IT NEED TO BE A CONSTANT.
VECTOR_SIZE IS A SHARED VARIABLE AND I WAS THINKING ABOUT CONVERTING IT TO A CONSTANT, IF THAT'S POSSIBLE