Module: OCI8::Math

Defined in:
ext/oci8/ocinumber.c

Constant Summary collapse

PI =

The ratio of the circumference of a circle to its diameter.

obj_PI

Class Method Summary collapse

Class Method Details

.OCI8::Math.acos(x) ⇒ Object

Computes the arc cosine of x. Returns 0..PI.



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# File 'ext/oci8/ocinumber.c', line 456

static VALUE omath_acos(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;
    sword sign;

    set_oci_number_from_num(&n, num, 1, errhp);
    /* check upper bound */
    chkerr(OCINumberCmp(errhp, &n, &const_p1, &sign));
    if (sign > 0)
        rb_raise(rb_eRangeError, "out of range for acos");
    /* check lower bound */
    chkerr(OCINumberCmp(errhp, &n, &const_m1, &sign));
    if (sign < 0)
        rb_raise(rb_eRangeError, "out of range for acos");
    /* acos */
    chkerr(OCINumberArcCos(errhp, &n, &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.asin(x) ⇒ Object

Computes the arc sine of x. Returns 0..PI.



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# File 'ext/oci8/ocinumber.c', line 483

static VALUE omath_asin(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;
    sword sign;

    set_oci_number_from_num(&n, num, 1, errhp);
    /* check upper bound */
    chkerr(OCINumberCmp(errhp, &n, &const_p1, &sign));
    if (sign > 0)
        rb_raise(rb_eRangeError, "out of range for asin");
    /* check lower bound */
    chkerr(OCINumberCmp(errhp, &n, &const_m1, &sign));
    if (sign < 0)
        rb_raise(rb_eRangeError, "out of range for asin");
    /* asin */
    chkerr(OCINumberArcSin(errhp, &n, &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.atan(x) ⇒ Object

Computes the arc tangent of x. Returns -PI/2 .. PI/2.



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# File 'ext/oci8/ocinumber.c', line 510

static VALUE omath_atan(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;

    chkerr(OCINumberArcTan(errhp, TO_OCINUM(&n, num, errhp), &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.atan2(y, x) ⇒ Object

Computes the arc tangent given y and x. Returns -PI..PI.



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# File 'ext/oci8/ocinumber.c', line 371

static VALUE omath_atan2(VALUE self, VALUE Ycoordinate, VALUE Xcoordinate)
{
    OCIError *errhp = oci8_errhp;
    OCINumber nY;
    OCINumber nX;
    OCINumber rv;
    boolean is_zero;
    sword sign;

    set_oci_number_from_num(&nX, Xcoordinate, 1, errhp);
    set_oci_number_from_num(&nY, Ycoordinate, 1, errhp);
    /* check zero */
    chkerr(OCINumberIsZero(errhp, &nX, &is_zero));
    if (is_zero) {
        chkerr(OCINumberSign(errhp, &nY, &sign));
        switch (sign) {
        case 0:
            return INT2FIX(0); /* atan2(0, 0) => 0 or ERROR? */
        case 1:
            return oci8_make_ocinumber(&const_PI2, errhp); /* atan2(positive, 0) => PI/2 */
        case -1:
            return oci8_make_ocinumber(&const_mPI2, errhp); /* atan2(negative, 0) => -PI/2 */
        }
    }
    /* atan2 */
    chkerr(OCINumberArcTan2(errhp, &nY, &nX, &rv));
    return oci8_make_ocinumber(&rv, errhp);
}

.OCI8::Math.cos(x) ⇒ Object

Computes the cosine of x (expressed in radians). Returns -1..1.



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# File 'ext/oci8/ocinumber.c', line 407

static VALUE omath_cos(VALUE obj, VALUE radian)
{
    OCIError *errhp = oci8_errhp;
    OCINumber r;
    OCINumber rv;

    chkerr(OCINumberCos(errhp, TO_OCINUM(&r, radian, errhp), &rv));
    return oci8_make_ocinumber(&rv, errhp);
}

.OCI8::Math.cosh(x) ⇒ Object

Computes the hyperbolic cosine of x (expressed in radians).



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# File 'ext/oci8/ocinumber.c', line 526

static VALUE omath_cosh(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;

    chkerr(OCINumberHypCos(errhp, TO_OCINUM(&n, num, errhp), &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.exp(x) ⇒ Object

Returns e**x.



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# File 'ext/oci8/ocinumber.c', line 576

static VALUE omath_exp(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;

    chkerr(OCINumberExp(errhp, TO_OCINUM(&n, num, errhp), &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.log(numeric) ⇒ Object .OCI8::Math.log(numeric, base_num) ⇒ Object

Returns the natural logarithm of numeric for one argument. Returns the base base_num logarithm of numeric for two arguments.



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# File 'ext/oci8/ocinumber.c', line 594

static VALUE omath_log(int argc, VALUE *argv, VALUE obj)
{
    OCIError *errhp = oci8_errhp;
    VALUE num, base;
    OCINumber n;
    OCINumber b;
    OCINumber r;
    sword sign;

    rb_scan_args(argc, argv, "11", &num, &base);
    set_oci_number_from_num(&n, num, 1, errhp);
    chkerr(OCINumberSign(errhp, &n, &sign));
    if (sign <= 0)
        rb_raise(rb_eRangeError, "nonpositive value for log");
    if (NIL_P(base)) {
        chkerr(OCINumberLn(errhp, &n, &r));
    } else {
        set_oci_number_from_num(&b, base, 1, errhp);
        chkerr(OCINumberSign(errhp, &b, &sign));
        if (sign <= 0)
            rb_raise(rb_eRangeError, "nonpositive value for the base of log");
        chkerr(OCINumberCmp(errhp, &b, &const_p1, &sign));
        if (sign == 0)
            rb_raise(rb_eRangeError, "base 1 for log");
        chkerr(OCINumberLog(errhp, &b, &n, &r));
    }
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.log10(numeric) ⇒ Object

Returns the base 10 logarithm of numeric.



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# File 'ext/oci8/ocinumber.c', line 629

static VALUE omath_log10(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;
    sword sign;

    set_oci_number_from_num(&n, num, 1, errhp);
    chkerr(OCINumberSign(errhp, &n, &sign));
    if (sign <= 0)
        rb_raise(rb_eRangeError, "nonpositive value for log10");
    chkerr(OCINumberLog(errhp, &const_p10, &n, &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.sin(x) ⇒ Object

Computes the sine of x (expressed in radians). Returns -1..1.



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# File 'ext/oci8/ocinumber.c', line 424

static VALUE omath_sin(VALUE obj, VALUE radian)
{
    OCIError *errhp = oci8_errhp;
    OCINumber r;
    OCINumber rv;

    chkerr(OCINumberSin(errhp, TO_OCINUM(&r, radian, errhp), &rv));
    return oci8_make_ocinumber(&rv, errhp);
}

.OCI8::Math.sinh(x) ⇒ Object

Computes the hyperbolic sine of x (expressed in radians).



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# File 'ext/oci8/ocinumber.c', line 543

static VALUE omath_sinh(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;

    chkerr(OCINumberHypSin(errhp, TO_OCINUM(&n, num, errhp), &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.sqrt(numeric) ⇒ Object

Returns the non-negative square root of numeric.



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# File 'ext/oci8/ocinumber.c', line 650

static VALUE omath_sqrt(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;
    sword sign;

    set_oci_number_from_num(&n, num, 1, errhp);
    /* check whether num is negative */
    chkerr(OCINumberSign(errhp, &n, &sign));
    if (sign < 0) {
        errno = EDOM;
        rb_sys_fail("sqrt");
    }
    chkerr(OCINumberSqrt(errhp, &n, &r));
    return oci8_make_ocinumber(&r, errhp);
}

.OCI8::Math.tan(x) ⇒ Object

Returns the tangent of x (expressed in radians).



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# File 'ext/oci8/ocinumber.c', line 440

static VALUE omath_tan(VALUE obj, VALUE radian)
{
    OCIError *errhp = oci8_errhp;
    OCINumber r;
    OCINumber rv;

    chkerr(OCINumberTan(errhp, TO_OCINUM(&r, radian, errhp), &rv));
    return oci8_make_ocinumber(&rv, errhp);
}

.OCI8::Math.tanh ⇒ Object

Computes the hyperbolic tangent of x (expressed in radians).



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# File 'ext/oci8/ocinumber.c', line 560

static VALUE omath_tanh(VALUE obj, VALUE num)
{
    OCIError *errhp = oci8_errhp;
    OCINumber n;
    OCINumber r;

    chkerr(OCINumberHypTan(errhp, TO_OCINUM(&n, num, errhp), &r));
    return oci8_make_ocinumber(&r, errhp);
}