4.5.2 vsip_vanytrue_p - Check if Any Element in Boolean Vector is True

vsip_scalar_bl vsip_vanytrue_bl(const vsip_vview_bl *a);

Description

This function checks whether any element in a boolean vector is true. It returns a single boolean value that is true if at least one element in the input vector is true.

The function performs the following logical operation:

where are the elements of the input vector and is the length of the vector.

Parameters

• const vsip_vview_p* a: Input boolean vector to check.

Return Value

• Returns true if at least one element in the vector is true.

• Returns false if all elements in the vector are false or if the vector is empty.

Example

vsip_vview_bl *flags; 
vsip_length n = 100; 
vsip_scalar_bl any_flag_set; 
 
// Create and initialize a boolean vector 
flags = vsip_vcreate_bl(n, VSIP_MEM_NONE); 
 
// Set all elements to false initially 
vsip_vfill_bl(flags, false); 
 
// Set some flags based on your algorithm's conditions 
// For example, set flag at index 42 to true 
vsip_vput_bl(flags, 42, true); 
 
// Check if any flag is set 
any_flag_set = vsip_vanytrue_bl(flags); 
if (any_flag_set) { 
    printf("At least one flag is set. Processing required.\n"); 
    // Perform necessary processing for your application 
} else { 
    printf("No flags are set. Skipping processing.\n"); 
} 
 
// For a more practical example with actual conditions: 
for (vsip_length i = 0; i < n; i++) { 
    // Set based on some actual conditions in your algorithm 
    vsip_vput_bl(flags, i, (i % 7) == 0);  // Set flags for indices divisible by 7 
} 
 
any_flag_set = vsip_vanytrue_bl(flags); 
// any_flag_set will be true in this case 
 
// Clean up 
vsip_valldestroy_bl(flags);