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XSharpLoadLibrary Function (RT)

Year Function (RT)

Mem2String Function

Extract a substring of a certain size from the left of a buffer.

Namespace: XSharp.RT
Assembly: XSharp.RT (in XSharp.RT.dll) Version: 2.19

Syntax

Copy

 FUNCTION Mem2String(
	ptrSource AS IntPtr,
	dwCount AS DWORD
) AS STRING

public static string Mem2String(
	IntPtr ptrSource,
	uint dwCount
)

Request Example View Source

Parameters

ptrSource: Type: IntPtr
Pointer to the buffer from which to extract the substring.
dwCount: Type: DWord
The number of bytes, from the left, to extract from ptrSource.

Return Value

Type: String
A substring of the specified number of bytes.

Remarks

Tip
Contrary to normal PSZs, strings are not static and may be collected by the garbage collector. Therefore, if you supply a string as an argument to a function, like Mem2String, which directly or indirectly allocates dynamic memory, you may run into trouble. For example, in Mem2String(Time(), 5), Time() may cause problems. But Mem2String("hi there", 5) will not cause problems since literal strings are not collected.

Tip

Contrary to normal PSZs, strings are not static and may be collected by the garbage collector.
Therefore, if you supply a string as an argument to a function, like Mem2String, which directly or indirectly allocates dynamic memory, you may run into trouble.
For example, in Mem2String(Time(), 5), Time() may cause problems. But Mem2String("hi there", 5) will not cause problems since literal strings are not collected.

Examples

This example uses Mem2String() to get the three leftmost characters of a PSZ:

Copy

1LOCAL pszSource AS PSZ
2pszSource := "ABCDEF"
3? Mem2String(pszSource, 3)            // ABC

Reference

Functions, Globals and Defines

XSharp.RT Namespace

Psz2String(Psz)