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From e482b394efc371412ce659b731a9b1e1d73bdf0e Mon Sep 17 00:00:00 2001
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From: akallabeth <akallabeth@posteo.net>
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Date: Mon, 24 Oct 2022 10:42:56 +0200
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Subject: [PATCH] Added function _wcsncmp
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* Compare WCHAR strings up to n characters
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(cherry picked from commit 8178ed26a459356ece17414c6e871a7e0735a4ec)
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---
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winpr/include/winpr/string.h | 2 ++
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winpr/libwinpr/crt/string.c | 15 ++++++++++++++-
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2 files changed, 16 insertions(+), 1 deletion(-)
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diff --git a/winpr/include/winpr/string.h b/winpr/include/winpr/string.h
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index 8ce83bc1d..3b907c444 100644
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--- a/winpr/include/winpr/string.h
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+++ b/winpr/include/winpr/string.h
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@@ -57,6 +57,7 @@ extern "C"
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WINPR_API int _strnicmp(const char* string1, const char* string2, size_t count);
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WINPR_API int _wcscmp(const WCHAR* string1, const WCHAR* string2);
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+ WINPR_API int _wcsncmp(const WCHAR* string1, const WCHAR* string2, size_t count);
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WINPR_API size_t _wcslen(const WCHAR* str);
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WINPR_API size_t _wcsnlen(const WCHAR* str, size_t maxNumberOfElements);
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@@ -70,6 +71,7 @@ extern "C"
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#else
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#define _wcscmp wcscmp
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+#define _wcsncmp wcsncmp
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#define _wcslen wcslen
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#define _wcsnlen wcsnlen
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#define _wcschr wcschr
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diff --git a/winpr/libwinpr/crt/string.c b/winpr/libwinpr/crt/string.c
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index 37fcb4b25..c25ffa279 100644
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--- a/winpr/libwinpr/crt/string.c
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+++ b/winpr/libwinpr/crt/string.c
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@@ -90,7 +90,20 @@ int _wcscmp(const WCHAR* string1, const WCHAR* string2)
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Data_Read_UINT16(string1, value1);
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Data_Read_UINT16(string2, value2);
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- return value1 - value2;
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+ return (int)value1 - value2;
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+}
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+
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+int _wcsncmp(const WCHAR* string1, const WCHAR* string2, size_t count)
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+{
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+ for (size_t x = 0; x < count; x++)
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+ {
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+ const WCHAR a = string1[x];
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+ const WCHAR b = string2[x];
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+
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+ if (a != b)
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+ return (int)a - b;
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+ }
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+ return 0;
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}
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/* _wcslen -> wcslen */
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--
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2.37.1
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