Input, Output, Assignment, Conversion - Cryptography in C and C++ - page 147

The function vcheck_l() was created for the analysis of CLINT arguments
with regard to the validity of their format. It should help to protect the FLINT/C
functions from being passed invalid parameters as CLINT values.

Function: test for a valid CLINT numerical format

int vcheck_l (CLINT n_l); Syntax:

n_l (object to be tested) Input:

Return:

E_VCHECK_OK if format ok
errors and warnings according to Table 8-1

Table 8-1. Diagnostic values of the function vcheck_l()

Return Value Diagnosis Explanation

E_VCHECK_OK Format is ok Info: The number has a valid

representation and a value with
the range of definition of a CLINT type.

E_VCHECK_LDZ leading zeros Warning: The number has leading zeros,

but otherwise a valid definition within

the range of definition.

E_VCHECK_MEM

memory error Error: NULL Pointer was passed.

E_VCHECK_OFL genuine overflow Error: The passed number is too large;

it cannot be represented as a

CLINT object.

int
vcheck_l (CLINT n_l)
{

unsigned int error = E_VCHECK_OK;