clang/win: Fix most -Wwriteable-strings warnings.

Many win32 APIs take non-const string pointers. I checked that MSDN documents
them as _In_ and says that they are inputs, and then added const_cast<>s at
the calling sites. (In one test, I introduced a helper struct so that there
can be fewer casts.)

This wasn't just busywork, I found one function that we were handing string
literals where the documentation explicitly said that that's not valid
(filed http://crbug.com/396705).

I didn't change the DECLARE_REGISTRY_APPID_RESOURCEID() call in cloud_print;
it sounds like that'll fix itself when we update to the 2014 sdk:
http://connect.microsoft.com/VisualStudio/feedback/details/806376/atl-hindrances-to-adopting-new-strictstrings-conformance-option-in-vs2013

BUG=396705,82385
R=rnk@chromium.org, rsleevi@chromium.org, sergeyu@chromium.org, vitalybuka@chromium.org

Review URL: https://codereview.chromium.org/413763003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285051 0039d316-1c4b-4281-b951-d872f2087c98

base/test/test_file_util_win.cc

@@ -47,7 +47,7 @@ bool DenyFilePermission(const FilePath& path, DWORD permission) {
   change.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
   change.Trustee.TrusteeForm = TRUSTEE_IS_NAME;
   change.Trustee.TrusteeType = TRUSTEE_IS_USER;
-  change.Trustee.ptstrName = L"CURRENT_USER";
+  change.Trustee.ptstrName = const_cast<wchar_t*>(L"CURRENT_USER");
 
   PACL new_dacl;
   if (SetEntriesInAcl(1, &change, old_dacl, &new_dacl) != ERROR_SUCCESS) {

cloud_print/virtual_driver/win/port_monitor/port_monitor_unittest.cc

@@ -236,7 +236,8 @@ TEST_F(PortMonitorTest, FlowTest) {
   EXPECT_TRUE(monitor2->pfnEndDocPort != NULL);
 
   // These functions should fail if we have not impersonated the user.
-  EXPECT_FALSE(monitor2->pfnStartDocPort(port_handle, L"", 0, 0, NULL));
+  EXPECT_FALSE(monitor2->pfnStartDocPort(
+      port_handle, const_cast<wchar_t*>(L""), 0, 0, NULL));
   EXPECT_FALSE(monitor2->pfnWritePort(port_handle,
                                      buffer,
                                      kBufferSize,
@@ -251,7 +252,8 @@ TEST_F(PortMonitorTest, FlowTest) {
 
   // Now impersonate so we can test the success case.
   ASSERT_TRUE(ImpersonateSelf(SecurityImpersonation));
-  EXPECT_TRUE(monitor2->pfnStartDocPort(port_handle, L"", 0, 0, NULL));
+  EXPECT_TRUE(monitor2->pfnStartDocPort(
+      port_handle, const_cast<wchar_t*>(L""), 0, 0, NULL));
   EXPECT_TRUE(monitor2->pfnWritePort(port_handle,
                                      buffer,
                                      kBufferSize,

net/base/keygen_handler_win.cc

@@ -36,7 +36,8 @@ bool GetSubjectPublicKeyInfo(HCRYPTPROV prov, std::vector<BYTE>* output) {
   // as a CERT_PUBLIC_KEY_INFO structure. Currently, only RSA public keys are
   // supported.
   ok = CryptExportPublicKeyInfoEx(prov, AT_KEYEXCHANGE, X509_ASN_ENCODING,
-                                  szOID_RSA_RSA, 0, NULL, NULL, &size);
+                                  const_cast<char*>(szOID_RSA_RSA), 0, NULL,
+                                  NULL, &size);
   DCHECK(ok);
   if (!ok)
     return false;
@@ -46,8 +47,8 @@ bool GetSubjectPublicKeyInfo(HCRYPTPROV prov, std::vector<BYTE>* output) {
   PCERT_PUBLIC_KEY_INFO public_key_casted =
       reinterpret_cast<PCERT_PUBLIC_KEY_INFO>(&(*output)[0]);
   ok = CryptExportPublicKeyInfoEx(prov, AT_KEYEXCHANGE, X509_ASN_ENCODING,
-                                  szOID_RSA_RSA, 0, NULL, public_key_casted,
-                                  &size);
+                                  const_cast<char*>(szOID_RSA_RSA), 0, NULL,
+                                  public_key_casted, &size);
   DCHECK(ok);
   if (!ok)
     return false;
@@ -82,7 +83,7 @@ bool GetSignedPublicKeyAndChallenge(HCRYPTPROV prov,
 
   CRYPT_ALGORITHM_IDENTIFIER sig_alg;
   memset(&sig_alg, 0, sizeof(sig_alg));
-  sig_alg.pszObjId = szOID_RSA_MD5RSA;
+  sig_alg.pszObjId = const_cast<char*>(szOID_RSA_MD5RSA);
 
   BOOL ok;
   DWORD size = 0;

net/cert/cert_verify_proc_win.cc

@@ -571,7 +571,7 @@ int CertVerifyProcWin::VerifyInternal(
   // We still need to request szOID_SERVER_GATED_CRYPTO and szOID_SGC_NETSCAPE
   // today because some certificate chains need them.  IE also requests these
   // two usages.
-  static const LPSTR usage[] = {
+  static const LPCSTR usage[] = {
     szOID_PKIX_KP_SERVER_AUTH,
     szOID_SERVER_GATED_CRYPTO,
     szOID_SGC_NETSCAPE

net/proxy/proxy_config_service_win_unittest.cc

@@ -12,9 +12,16 @@
 namespace net {
 
 TEST(ProxyConfigServiceWinTest, SetFromIEConfig) {
+  // Like WINHTTP_CURRENT_USER_IE_PROXY_CONFIG, but with const strings.
+  struct IEProxyConfig {
+    BOOL auto_detect;
+    const wchar_t* auto_config_url;
+    const wchar_t* proxy;
+    const wchar_t* proxy_bypass;
+  };
   const struct {
     // Input.
-    WINHTTP_CURRENT_USER_IE_PROXY_CONFIG ie_config;
+    IEProxyConfig ie_config;
 
     // Expected outputs (fields of the ProxyConfig).
     bool auto_detect;
@@ -190,8 +197,13 @@ TEST(ProxyConfigServiceWinTest, SetFromIEConfig) {
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
+    WINHTTP_CURRENT_USER_IE_PROXY_CONFIG ie_config = {
+        tests[i].ie_config.auto_detect,
+        const_cast<wchar_t*>(tests[i].ie_config.auto_config_url),
+        const_cast<wchar_t*>(tests[i].ie_config.proxy),
+        const_cast<wchar_t*>(tests[i].ie_config.proxy_bypass)};
     ProxyConfig config;
-    ProxyConfigServiceWin::SetFromIEConfig(&config, tests[i].ie_config);
+    ProxyConfigServiceWin::SetFromIEConfig(&config, ie_config);
 
     EXPECT_EQ(tests[i].auto_detect, config.auto_detect());
     EXPECT_EQ(tests[i].pac_url, config.pac_url());

printing/backend/win_helper.cc

@@ -472,14 +472,18 @@ scoped_ptr<DEVMODE, base::FreeDeleter> CreateDevModeWithColor(
 
 scoped_ptr<DEVMODE, base::FreeDeleter> CreateDevMode(HANDLE printer,
                                                      DEVMODE* in) {
-  LONG buffer_size = DocumentProperties(NULL, printer, L"", NULL, NULL, 0);
+  LONG buffer_size = DocumentProperties(
+      NULL, printer, const_cast<wchar_t*>(L""), NULL, NULL, 0);
   if (buffer_size < static_cast<int>(sizeof(DEVMODE)))
     return scoped_ptr<DEVMODE, base::FreeDeleter>();
   scoped_ptr<DEVMODE, base::FreeDeleter> out(
       reinterpret_cast<DEVMODE*>(malloc(buffer_size)));
   DWORD flags = (in ? (DM_IN_BUFFER) : 0) | DM_OUT_BUFFER;
-  if (DocumentProperties(NULL, printer, L"", out.get(), in, flags) != IDOK)
+  if (DocumentProperties(
+          NULL, printer, const_cast<wchar_t*>(L""), out.get(), in, flags) !=
+      IDOK) {
     return scoped_ptr<DEVMODE, base::FreeDeleter>();
+  }
   CHECK_GE(buffer_size, out.get()->dmSize + out.get()->dmDriverExtra);
   return out.Pass();
 }

remoting/base/dispatch_win.h

@@ -117,13 +117,14 @@ COMPILE_ASSERT(sizeof(ScopedVariantArg) == sizeof(VARIANTARG),
 //   - VARIANT is the only supported parameter type at the moment.
 
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -161,14 +162,15 @@ HRESULT Invoke(IDispatch* object,
 
 template <typename P1>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -213,15 +215,16 @@ HRESULT Invoke(IDispatch* object,
 
 template <typename P1, typename P2>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -270,7 +273,7 @@ HRESULT Invoke(IDispatch* object,
 
 template <typename P1, typename P2, typename P3>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
@@ -278,8 +281,9 @@ HRESULT Invoke(IDispatch* object,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -332,7 +336,7 @@ HRESULT Invoke(IDispatch* object,
 
 template <typename P1, typename P2, typename P3, typename P4>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
@@ -341,8 +345,9 @@ HRESULT Invoke(IDispatch* object,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -399,7 +404,7 @@ HRESULT Invoke(IDispatch* object,
 
 template <typename P1, typename P2, typename P3, typename P4, typename P5>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
@@ -409,8 +414,9 @@ HRESULT Invoke(IDispatch* object,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -472,7 +478,7 @@ HRESULT Invoke(IDispatch* object,
 template <typename P1, typename P2, typename P3, typename P4, typename P5,
     typename P6>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
@@ -483,8 +489,9 @@ HRESULT Invoke(IDispatch* object,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 
@@ -550,7 +557,7 @@ HRESULT Invoke(IDispatch* object,
 template <typename P1, typename P2, typename P3, typename P4, typename P5,
     typename P6, typename P7>
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
                const P1& p1,
                const P2& p2,
@@ -562,8 +569,9 @@ HRESULT Invoke(IDispatch* object,
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 

remoting/base/dispatch_win.h.pump

@@ -128,7 +128,7 @@ $range ARG 1..ARITY
 $if ARITY > 0 [[template <$for ARG , [[typename P$(ARG)]]>]]
 
 HRESULT Invoke(IDispatch* object,
-               LPOLESTR name,
+               LPCOLESTR const_name,
                WORD flags,
 $for ARG [[
 
@@ -138,8 +138,9 @@ $for ARG [[
                VARIANT* const & result_out) {
   // Retrieve the ID of the method to be called.
   DISPID disp_id;
-  HRESULT hr = object->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_USER_DEFAULT,
-                                     &disp_id);
+  LPOLESTR name = const_cast<LPOLESTR>(const_name);
+  HRESULT hr = object->GetIDsOfNames(
+      IID_NULL, &name, 1, LOCALE_USER_DEFAULT, &disp_id);
   if (FAILED(hr))
     return hr;
 

rlz/win/lib/rlz_lib_win.cc

@@ -153,7 +153,7 @@ bool CreateMachineState() {
   ea.grfAccessMode = GRANT_ACCESS;
   ea.grfInheritance= SUB_CONTAINERS_AND_OBJECTS_INHERIT;
   ea.Trustee.TrusteeForm = TRUSTEE_IS_NAME;
-  ea.Trustee.ptstrName = L"Everyone";
+  ea.Trustee.ptstrName = const_cast<wchar_t*>(L"Everyone");
 
   ACL* new_dacl = NULL;
   result = SetEntriesInAcl(1, &ea, dacl, &new_dacl);