RtlAnsiStringToUnicodeSize routine
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RtlAnsiStringToUnicodeSize routine
RtlAnsiStringToUnicodeSize 返回一个ANSI字符串转换为Unicode字符串后需要多少字节的储存空间。
Syntax
ULONG RtlAnsiStringToUnicodeSize( _In_ PANSI_STRING AnsiString);
Parameters
AnsiString [in]
指向一个包含ANSI 字符串的缓冲区。
Return value
RtlAnsiStringToUnicodeSize 返回为转换为宽字符后必需的大小,以字节为大小。
Remarks
Note 转换 RtlAnsiStringToUnicodeSize 返回到 USHORT 可能引起数据的丢失.为了避免这一个潜在的问题,调用者应当测试返回值是否有数值溢出. 注意RtlAnsiStringToUnicodeSize 计算长度时将结尾的 NULL包含在内.
Callers of RtlAnsiStringToUnicodeSize must be running at IRQL = PASSIVE_LEVEL.
Requirements
Target platform
Universal
Version
Available starting with Windows 2000.
Header
Wdm.h (include Wdm.h, Ntddk.h, or Ntifs.h)
Library
NtosKrnl.lib
DLL
NtosKrnl.exe
IRQL
PASSIVE_LEVEL
See also
RtlAnsiStringToUnicodeString
RtlxAnsiStringToUnicodeSize
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