Minor changes

RenardDev · Feb 9, 2024 · 87ffc28 · 87ffc28
1 parent 4ccf933
commit 87ffc28
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Showing 3 changed files with 85 additions and 3 deletions.
diff --git a/Detours.cpp b/Detours.cpp
@@ -473,6 +473,46 @@ namespace Detours {
 
 	namespace Codec {
 
+		// ----------------------------------------------------------------
+		// UpperCase
+		// ----------------------------------------------------------------
+
+		bool UpperCase(char szBuffer[], const size_t unSize) {
+			if (!szBuffer || !unSize) {
+				return false;
+			}
+
+			for (size_t i = 0; i < unSize; ++i) {
+				const unsigned char unX = szBuffer[i];
+
+				if ((unX >= 'a') && (unX <= 'z')) {
+					szBuffer[i] = unX & ~0x20;
+				}
+			}
+
+			return true;
+		}
+
+		// ----------------------------------------------------------------
+		// LowerCase
+		// ----------------------------------------------------------------
+
+		bool LowerCase(char szBuffer[], const size_t unSize) {
+			if (!szBuffer || !unSize) {
+				return false;
+			}
+
+			for (size_t i = 0; i < unSize; ++i) {
+				const unsigned char unX = szBuffer[i];
+
+				if ((unX >= 'A') && (unX <= 'Z')) {
+					szBuffer[i] = unX | 0x20;
+				}
+			}
+
+			return true;
+		}
+
 		// ----------------------------------------------------------------
 		// Encode
 		// ----------------------------------------------------------------
@@ -921,13 +961,17 @@ namespace Detours {
 
 				PIMAGE_POGO_BLOCK pBlock = pPI->m_pBlocks;
 				while (pBlock->m_unRVA != 0) {
-					const size_t unNameLength = strnlen_s(pBlock->m_pName, 0x1000) + 1; // FIXME: Unsafe.
-					size_t unBlockSize = sizeof(DWORD) * 2 + unNameLength;
+					const size_t unNameLength = strnlen_s(pBlock->m_pName, 0x7FF);
+					if (unNameLength == 0x7FF) {
+						break;
+					}
+
+					size_t unBlockSize = sizeof(DWORD) * 2 + unNameLength + 1;
 					if (unBlockSize & 3) {
 						unBlockSize += (4 - (unBlockSize & 3));
 					}
 
-					if (strncmp(szSectionName, pBlock->m_pName, 0x1000) == 0) { // FIXME: Unsafe.
+					if (strncmp(szSectionName, pBlock->m_pName, 0x7FF) == 0) {
 						if (pAddress) {
 							*pAddress = reinterpret_cast<void*>(reinterpret_cast<char*>(hModule) + pBlock->m_unRVA);
 						}

diff --git a/Detours.h b/Detours.h
@@ -1460,6 +1460,18 @@ namespace Detours {
 
 	namespace Codec {
 
+		// ----------------------------------------------------------------
+		// UpperCase
+		// ----------------------------------------------------------------
+
+		bool UpperCase(char szBuffer[], const size_t unSize);
+
+		// ----------------------------------------------------------------
+		// LowerCase
+		// ----------------------------------------------------------------
+
+		bool LowerCase(char szBuffer[], const size_t unSize);
+
 		// ----------------------------------------------------------------
 		// Encode
 		// ----------------------------------------------------------------

diff --git a/main.cpp b/main.cpp
@@ -1707,6 +1707,32 @@ int _tmain(int nArguments, PTCHAR* pArguments) {
 
 	_tprintf_s(_T("Codec Example\n\n"));
 
+	char* szHelloWorld = _strdup("Hello, World!");
+	if (szHelloWorld) {
+		const size_t unSize = strnlen(szHelloWorld, 0x7FF);
+		if (unSize != 0x7FF) {
+#ifdef _UNICODE
+			if (Detours::Codec::UpperCase(szHelloWorld, unSize)) {
+				_tprintf_s(_T("UpperCase: `%hs`\n"), szHelloWorld);
+			}
+
+			if (Detours::Codec::LowerCase(szHelloWorld, unSize)) {
+				_tprintf_s(_T("LowerCase: `%hs`\n"), szHelloWorld);
+			}
+#else
+			if (Detours::Codec::UpperCase(szHelloWorld, unSize)) {
+				_tprintf_s(_T("UpperCase: `%s`\n"), szHelloWorld);
+			}
+
+			if (Detours::Codec::LowerCase(szHelloWorld, unSize)) {
+				_tprintf_s(_T("LowerCase: `%s`\n"), szHelloWorld);
+			}
+#endif
+		}
+
+		free(szHelloWorld);
+	}
+
 	int nEncodeSize = Detours::Codec::Encode(CP_UTF8, "Hello, World!");
 	if (nEncodeSize > 0) {
 		HANDLE hHeap = GetProcessHeap();