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Added ToString method that includes an offset parameter.

pull/83/head
David Hall 2019-09-27 13:32:19 -06:00
parent 0d92eb39b8
commit 740bd61ac5
1 changed files with 19 additions and 1 deletions
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20
Core/InteropServices/SafeMemoryHandle.cs
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@ -98,6 +98,13 @@ namespace Vanara.InteropServices
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
string ToString(int len, CharSet charSet = CharSet.Unicode);
/// <summary>Returns a <see cref="System.String"/> that represents this instance.</summary>
/// <param name="len">The length.</param>
/// <param name="prefixBytes">Number of bytes preceding the string pointer.</param>
/// <param name="charSet">The character set of the string.</param>
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
string ToString(int len, int prefixBytes, CharSet charSet = CharSet.Unicode);
/// <summary>
/// Gets an enumerated list of strings from a block of unmanaged memory where each string is separated by a single '\0' character and is terminated by
/// two '\0' characters.
@ -352,7 +359,18 @@ namespace Vanara.InteropServices
/// <param name="len">The length.</param>
/// <param name="charSet">The character set of the string.</param>
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
public string ToString(int len, CharSet charSet = CharSet.Unicode) => len == -1 ? StringHelper.GetString(handle, charSet) : StringHelper.GetString(handle, charSet, sz).Substring(0, len);
public string ToString(int len, CharSet charSet = CharSet.Unicode) => ToString(len, 0, charSet);
/// <summary>Returns a <see cref="System.String"/> that represents this instance.</summary>
/// <param name="len">The length.</param>
/// <param name="prefixBytes">Number of bytes preceding the string pointer.</param>
/// <param name="charSet">The character set of the string.</param>
/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
public string ToString(int len, int prefixBytes, CharSet charSet = CharSet.Unicode)
{
var str = StringHelper.GetString(handle.Offset(prefixBytes), charSet, sz - prefixBytes);
return len == -1 ? str : str.Substring(0, len);
}
/// <summary>Returns an enumeration of strings from memory where each string is pointed to by a preceding list of pointers of length <paramref name="count"/>.</summary>
/// <param name="count">The count of expected strings.</param>