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33 lines
841 B
33 lines
841 B
#include "test_I.h"
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#define floor(a,b) ((a) / (b))
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int test_I_sqrtp (int iterations)
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{
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int error = 0;
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int i;
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// Check against isqrt.
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for (i = iterations; i > 0; i--) {
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cl_I a = testrandom_I();
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if (a >= 0) {
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cl_I w;
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cl_boolean squarep = sqrtp(a,&w);
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cl_I correct_w;
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cl_boolean correct_squarep = isqrt(a,&correct_w);
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ASSERT1(squarep == correct_squarep, a);
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if (squarep)
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ASSERT1(w == correct_w, a);
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}
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}
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// Check certain special cases.
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for (i = iterations; i > 0; i--) {
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cl_I a = abs(testrandom_I());
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cl_I w;
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// Check a^2 is a square.
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ASSERT1(sqrtp(a*a,&w) && w == a, a);
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// Check a^2+1 is not a square, except when a=0.
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if (a > 0) ASSERT1(!isqrt(a*a+1,&w) && w == a, a);
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// Check a^2+2*a is not a square, except when a=0.
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ASSERT1(isqrt(a*(a+2),&w)==(a==0) && w == a, a);
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}
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return error;
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}
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