fix compiler warnings

Author: Expander

src/cpp/Cl.cpp

@@ -189,7 +189,7 @@ double ncal(int64_t n, double x) noexcept
    const auto x2 = x*x;
    double xn = xn1*x2; // x^(n + 3)
 
-   for (int64_t k = 1; k <= sizeof(B)/sizeof(B[0]); ++k) {
+   for (int64_t k = 1; k <= static_cast<int64_t>(sizeof(B)/sizeof(B[0])); ++k) {
       old_sum = sum;
       sum += B[k - 1]*xn/(2*k + n + 1);
       if (sum == old_sum) {

src/cpp/eta.cpp

@@ -83,7 +83,7 @@ double neg_eta(int64_t n) noexcept
    if (n < 0) {
       if (is_even(n)) {
          return 0.0;
-      } else if (-(1 + n)/2 < sizeof(NEG_ETA_NEG_N)/sizeof(NEG_ETA_NEG_N[0])) {
+      } else if (-(1 + n)/2 < static_cast<int64_t>(sizeof(NEG_ETA_NEG_N)/sizeof(NEG_ETA_NEG_N[0]))) {
          return NEG_ETA_NEG_N[-(1 + n)/2];
       } else if (is_even((1 - n)/2)) {
          return std::numeric_limits<double>::infinity();
@@ -92,7 +92,7 @@ double neg_eta(int64_t n) noexcept
       }
    } else if (n == 0) {
       return -0.5;
-   } else if (n <= sizeof(NEG_ETA)/sizeof(NEG_ETA[0])) {
+   } else if (n <= static_cast<int64_t>(sizeof(NEG_ETA)/sizeof(NEG_ETA[0]))) {
       return NEG_ETA[n - 1];
    } else {
       return -1.0;

src/cpp/factorial.cpp

@@ -81,7 +81,7 @@ double inv_fac(int64_t n) noexcept
 {
    if (n < 0) {
       return std::numeric_limits<double>::quiet_NaN();
-   } else if (n < sizeof(INVERSE_FACTORIALS)/sizeof(INVERSE_FACTORIALS[0])) {
+   } else if (n < static_cast<int64_t>(sizeof(INVERSE_FACTORIALS)/sizeof(INVERSE_FACTORIALS[0]))) {
          return INVERSE_FACTORIALS[n];
       } else {
       return 0.0;

src/cpp/zeta.cpp

@@ -85,7 +85,7 @@ double zeta(int64_t n) noexcept
    if (n < 0) {
       if (is_even(n)) {
          return 0.0;
-      } else if (-(1 + n)/2 < sizeof(ZETAS_NEG)/sizeof(ZETAS_NEG[0])) {
+      } else if (-(1 + n)/2 < static_cast<int64_t>(sizeof(ZETAS_NEG)/sizeof(ZETAS_NEG[0]))) {
          return ZETAS_NEG[-(1 + n)/2];
       } else if (is_even((1 - n)/2)) {
          return std::numeric_limits<double>::infinity();
@@ -96,7 +96,7 @@ double zeta(int64_t n) noexcept
       return -0.5;
    } else if (n == 1) {
       return std::numeric_limits<double>::infinity();
-   } else if ((n - 2) < sizeof(ZETAS_POS)/sizeof(ZETAS_POS[0])) {
+   } else if ((n - 2) < static_cast<int64_t>(sizeof(ZETAS_POS)/sizeof(ZETAS_POS[0]))) {
       return ZETAS_POS[n - 2];
    }