gmp_lib.gmp_vfscanf Method

GMP Native Interface for .NET

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gmp_libgmp_vfscanf Method
Read from the stream fp.

Namespace:  Math.Gmp.Native
Assembly:  Math.Gmp.Native (in Math.Gmp.Native.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
Copy
public static int gmp_vfscanf(
	ptr<FILE> fp,
	string fmt,
	params Object[] ap
)
Public Shared Function gmp_vfscanf ( 
	fp As ptr(Of FILE),
	fmt As String,
	ParamArray ap As Object()
) As Integer
public:
static int gmp_vfscanf(
	ptr<FILE>^ fp, 
	String^ fmt, 
	... array<Object^>^ ap
)
static member gmp_vfscanf : 
        fp : ptr<FILE> * 
        fmt : string * 
        ap : Object[] -> int

Parameters

fp
Type: Math.Gmp.NativeptrFILE
File stream.
fmt
Type: SystemString
Format string. See Formatted Input Strings.
ap
Type: SystemObject
Arguments.

Return Value

Type: Int32
The return value the number of fields successfully parsed and stored. ‘%n’ fields and fields read but suppressed by ‘*’ don’t count towards the return value.
Examples
Copy
// Create unique filename and stream pointer.
string pathname = System.IO.Path.GetTempFileName();
ptr<FILE> stream = new ptr<FILE>();

mpz_t z = "0";
mpq_t q = "0";
mpf_t f = "0";
ptr<Char> c = new ptr<Char>('0');
ptr<mp_size_t> zt = new ptr<mp_size_t>(0);
ptr<Double> dbl = new ptr<Double>(0);

// Write string to file, and then read values from it.
System.IO.File.WriteAllText(pathname, "123456 7B/1C8 1.234500e+10 A 10 1.000000");
_wfopen_s(out stream.Value.Value, pathname, "r");
Assert.IsTrue(gmp_lib.gmp_vfscanf(stream, "%Zd %QX %Fe %hhc %d %lf", z, q, f, c, zt, dbl) == 6);
fclose(stream.Value.Value);

// Assert values read.
Assert.IsTrue(z.ToString() == "123456");
Assert.IsTrue(q.ToString() == "123/456");
Assert.IsTrue(f.ToString() == "0.12345e11");
Assert.IsTrue(c.Value == 'A');
Assert.IsTrue(zt.Value == 10);
Assert.IsTrue(dbl.Value == 1.0);

// Release unmanaged memory.
gmp_lib.mpz_clear(z);
gmp_lib.mpq_clear(q);
gmp_lib.mpf_clear(f);
' Create unique filename and stream pointer.
Dim pathname As String = System.IO.Path.GetTempFileName()
Dim stream As New ptr(Of FILE)()

Dim z As mpz_t = "0"
Dim q As mpq_t = "0"
Dim f As mpf_t = "0"
Dim c As New ptr(Of[Char])("0"C)
Dim zt As New ptr(Of mp_size_t)(0)
Dim dbl As New ptr(Of[Double])(0)

' Write string to file, and then read values from it.
System.IO.File.WriteAllText(pathname, "123456 7B/1C8 1.234500e+10 A 10 1.000000")
_wfopen_s(stream.Value.Value, pathname, "r")
Assert.IsTrue(gmp_lib.gmp_vfscanf(stream, "%Zd %QX %Fe %hhc %d %lf", z, q, f, c, zt, dbl) = 6)
fclose(stream.Value.Value)

' Assert values read.
Assert.IsTrue(z.ToString() = "123456")
Assert.IsTrue(q.ToString() = "123/456")
Assert.IsTrue(f.ToString() = "0.12345e11")
Assert.IsTrue(c.Value = "A"C)
Assert.IsTrue(zt.Value = 10)
Assert.IsTrue(dbl.Value = 1.0)

' Release unmanaged memory.
gmp_lib.mpz_clear(z)
gmp_lib.mpq_clear(q)
gmp_lib.mpf_clear(f)

No code example is currently available or this language may not be supported.

No code example is currently available or this language may not be supported.

See Also
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