// FromString returns a Quad from a string.
//
// Special values "NaN" (also "qNaN"), "sNaN", "NaN123" (NaN with payload), "sNaN123" (sNaN with payload), "Infinity" (or "Inf", "+Inf"), "-Infinity" ( or "-Inf") are accepted.
//
// Infinity and -Infinity, or Inf and -Inf, represent a value infinitely large.
//
// NaN or qNaN, which means "Not a Number", represents an undefined result, when an arithmetic operation has failed. E.g. FromString("hello")
// NaN propagates to all subsequent operations, because if NaN is passed as argument, the result, will be NaN.
// These NaN are called "quiet NaN", because they don't set exceptional condition flag in status when passed as argument to an operation.
//
// sNaN, or "signaling NaN", are created by FromString("sNaN"). When passed as argument to an operation, the result will be NaN, like with quiet NaN.
// But they will set (==signal) an exceptional condition flag in status, "Invalid_operation".
// Signaling NaN propagate to subsequent operation as ordinary NaN (quiet NaN), and not as "signaling NaN".
//
// Note that both NaN and sNaN can take an integer payload, e.g. NaN123, created by FromString("NaN123"), and it is up to you to give it a significance.
// sNaN and payload are not used often, and most probably, you won't use them.
//
// This function returns result.Error() as a convenience.
//
func FromString(s string) (result Quad, err error) {
var cs *C.char
s = strings.TrimSpace(s)
cs = C.CString(s)
defer C.free(unsafe.Pointer(cs))
result = Quad(C.mdq_from_string(cs))
return result, result.Error()
}
// FromString returns a Quad from a string.
//
// Special values "NaN" (also "qNaN"), "sNaN", "NaN123" (NaN with payload), "sNaN123" (sNaN with payload), "Infinity" (or "Inf", "+Inf"), "-Infinity" ( or "-Inf") are accepted.
//
// Infinity and -Infinity, or Inf and -Inf, represent a value infinitely large.
//
// NaN or qNaN, which means "Not a Number", represents an undefined result, when an arithmetic operation has failed. E.g. FromString("hello")
// NaN propagates to all subsequent operations, because if NaN is passed as argument, the result, will be NaN.
// These NaN are called "quiet NaN", because they don't set exceptional condition flag in status when passed as argument to an operation.
//
// sNaN, or "signaling NaN", are created by FromString("sNaN"). When passed as argument to an operation, the result will be NaN, like with quiet NaN.
// But they will set (==signal) an exceptional condition flag in status, "Invalid_operation".
// Signaling NaN propagate to subsequent operation as ordinary NaN (quiet NaN), and not as "signaling NaN".
//
// Note that both NaN and sNaN can take an integer payload, e.g. NaN123, created by FromString("NaN123"), and it is up to you to give it a significance.
// sNaN and payload are not used often, and most probably, you won't use them.
//
func (context *Context) FromString(s string) (r Quad) {
var (
cs *C.char
result C.Ret_decQuad_t
)
assert_sane(context)
s = strings.TrimSpace(s)
cs = C.CString(s)
defer C.free(unsafe.Pointer(cs))
result = C.mdq_from_string(cs, context.set)
context.set = result.set
return Quad{val: result.val}
}