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From fb9d753af70b449dd7a17898d46fd57822a08dc1 Mon Sep 17 00:00:00 2001
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From: akallabeth <akallabeth@posteo.net>
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Date: Thu, 10 Nov 2022 14:21:22 +0100
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Subject: [PATCH] [winpr, crt] Fix wcs*cmp and wcs*len checks
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(cherry picked from commit b60fac1a0470fe83e8d0b448f0fd7e9e6d6a0f96)
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---
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winpr/libwinpr/crt/string.c | 30 +++++++++++++++++++-----------
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1 file changed, 19 insertions(+), 11 deletions(-)
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diff --git a/winpr/libwinpr/crt/string.c b/winpr/libwinpr/crt/string.c
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index c25ffa279..5dcf4b3f1 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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@@ -26,6 +26,7 @@
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#include <wctype.h>
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#include <winpr/crt.h>
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+#include <assert.h>
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#include <winpr/endian.h>
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/* String Manipulation (CRT): http://msdn.microsoft.com/en-us/library/f0151s4x.aspx */
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@@ -80,21 +81,28 @@ int _strnicmp(const char* string1, const char* string2, size_t count)
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int _wcscmp(const WCHAR* string1, const WCHAR* string2)
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{
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- WCHAR value1, value2;
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+ assert(string1);
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+ assert(string2);
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- while (*string1 && (*string1 == *string2))
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+ while (TRUE)
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{
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- string1++;
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- string2++;
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+ const WCHAR w1 = *string1++;
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+ const WCHAR w2 = *string2++;
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+
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+ if (w1 != w2)
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+ return (int)w1 - w2;
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+ else if ((w1 == '\0') || (w2 == '\0'))
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+ return (int)w1 - w2;
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}
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- Data_Read_UINT16(string1, value1);
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- Data_Read_UINT16(string2, value2);
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- return (int)value1 - value2;
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+ return 0;
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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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+ assert(string1);
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+ assert(string2);
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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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@@ -102,6 +110,8 @@ int _wcsncmp(const WCHAR* string1, const WCHAR* string2, size_t count)
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if (a != b)
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return (int)a - b;
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+ else if ((a == '\0') || (b == '\0'))
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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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@@ -112,8 +122,7 @@ size_t _wcslen(const WCHAR* str)
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{
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const WCHAR* p = (const WCHAR*)str;
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- if (!p)
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- return 0;
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+ assert(p);
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while (*p)
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p++;
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@@ -127,8 +136,7 @@ size_t _wcsnlen(const WCHAR* str, size_t max)
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{
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size_t x;
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- if (!str)
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- return 0;
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+ assert(str);
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for (x = 0; x < max; x++)
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{
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--
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2.37.1
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