Add support for hl2sdk-mock.

This also fixes UTIL_Relatize basically being completely bogus. For
backwards compat it's wrapped in a helper though.

AMBuildScript

@@ -46,6 +46,11 @@ Blade = {
   'windows': ['x86', 'x86_64'],
   'linux': ['x86_64']
 }
+Mock = {
+  'windows': ['x86', 'x86_64'],
+  'linux': ['x86', 'x86_64'],
+  'mac': ['x86_64']
+}
 
 PossibleSDKs = {
   'episode1':  SDK('HL2SDK', '2.ep1', '1', 'EPISODEONE', WinLinux, 'episode1'),
@@ -70,6 +75,7 @@ PossibleSDKs = {
   'doi':  SDK('HL2SDKDOI', '2.doi', '20', 'DOI', WinLinuxMac, 'doi'),
   'contagion':  SDK('HL2SDKCONTAGION', '2.contagion', '14', 'CONTAGION', WinOnly, 'contagion'),
   'bms':  SDK('HL2SDKBMS', '2.bms', '10', 'BMS', WinLinux, 'bms'),
+  'mock': SDK('HL2SDK-MOCK', '2.mock', '999', 'MOCK', Mock, 'mock'),
 }
 
 def ResolveEnvPath(env, folder):
@@ -200,7 +206,10 @@ class MMSConfig(object):
         '-fPIC',
       ]
 
-      cxx.cxxflags += [ '-std=c++11' ]
+      if cxx.version == 'apple-clang-6.0' or cxx.version == 'clang-3.4':
+        cxx.cxxflags += ['-std=c++1y']
+      else:
+        cxx.cxxflags += ['-std=c++14']
       if (cxx.version >= 'gcc-4.0') or cxx.family == 'clang':
         cxx.cflags += ['-fvisibility=hidden']
         cxx.cxxflags += ['-fvisibility-inlines-hidden']
@@ -450,10 +459,13 @@ class MMSConfig(object):
         lib_folder = os.path.join(sdk.path, 'lib', 'mac')
 
     if compiler.target.platform in ['linux', 'mac']:
-      if sdk.name in ['sdk2013', 'bms'] or compiler.target.arch == 'x86_64':
+      if sdk.name in ['sdk2013', 'bms', 'mock'] or compiler.target.arch == 'x86_64':
-        compiler.postlink += [os.path.join(lib_folder, 'tier1.a')]
+        tier1 = os.path.join(lib_folder, 'tier1.a')
       else:
-        compiler.postlink += [os.path.join(lib_folder, 'tier1_i486.a')]
+        tier1 = os.path.join(lib_folder, 'tier1_i486.a')
+      if sdk.name == 'mock' and compiler.target.platform == 'linux':
+        compiler.linkflags += ['-Wl,-z,origin']
+      compiler.postlink += [tier1]
 
       if sdk.name in ['blade', 'insurgency', 'doi', 'csgo', 'dota']:
         if compiler.target.arch == 'x86_64':
@@ -472,12 +484,14 @@ class MMSConfig(object):
       compiler.linkflags[0:0] = ['-lm']
       if sdk.name in ['css', 'hl2dm', 'dods', 'tf2', 'sdk2013', 'bms', 'nucleardawn', 'l4d2', 'insurgency', 'doi']:
         dynamic_libs = ['libtier0_srv.so', 'libvstdlib_srv.so']
-      elif compiler.target.arch == 'x86_64' and sdk.name in ['csgo', 'blade']:
+      elif compiler.target.arch == 'x86_64' and sdk.name in ['csgo', 'blade', 'mock']:
         dynamic_libs = ['libtier0_client.so', 'libvstdlib_client.so']
       elif sdk.name in ['l4d', 'blade', 'insurgency', 'doi', 'csgo', 'dota']:
         dynamic_libs = ['libtier0.so', 'libvstdlib.so']
       else:
         dynamic_libs = ['tier0_i486.so', 'vstdlib_i486.so']
+      if sdk.name in ['csgo', 'blade']:
+        compiler.defines += ['_GLIBCXX_USE_CXX11_ABI=0']
     elif compiler.target.platform == 'mac':
       binary.compiler.linkflags.append('-liconv')
       dynamic_libs = ['libtier0.dylib', 'libvstdlib.dylib']

core/ISmmPluginExt.h

@@ -60,6 +60,7 @@
 #define SOURCE_ENGINE_CONTAGION			22				/**< Contagion */
 #define SOURCE_ENGINE_BMS				23				/**< Black Mesa Multiplayer */
 #define SOURCE_ENGINE_DOI				24				/**< Day of Infamy */
+#define SOURCE_ENGINE_MOCK				25				/**< Mock source engine */
 
 #define METAMOD_PLAPI_VERSION			16				/**< Version of this header file */
 #define METAMOD_PLAPI_NAME				"ISmmPlugin"	/**< Name of the plugin interface */

core/metamod_util.cpp

@@ -28,9 +28,20 @@
 #include <ctype.h>
 #include <string.h>
 #include <stdio.h>
+#include <string>
+#include <vector>
 #include "metamod_util.h"
 #include "metamod_oslink.h"
 
+#ifdef _WIN32
+# include <io.h>
+#else
+# include <fcntl.h>
+# include <unistd.h>
+#endif
+
+using namespace std::string_literals;
+
 /**
  * @brief Utility functions
  * @file util.cpp
@@ -239,7 +250,7 @@ inline bool pathchar_cmp(char a, char b)
  * @param relFrom		Source file or folder to use as a target.
  * @return				True on success, false on failure.
  */
-bool UTIL_Relatize(char buffer[],
+bool UTIL_BadRelatize(char buffer[],
 				      size_t maxlength,
 				      const char *relTo,
 				      const char *relFrom)
@@ -357,3 +368,101 @@ bool UTIL_VerifySignature(const void *addr, const char *sig, size_t len)
 
 	return true;
 }
+
+static bool ComparePathComponent(const std::string& a, const std::string& b) {
+#ifdef _WIN32
+	if (a.size() != b.size())
+		return false;
+	for (size_t i = 0; i < a.size(); i++) {
+		if (!pathchar_cmp(a[i], b[i]))
+			return false;
+	}
+	return true;
+#else
+	return a == b;
+#endif
+}
+
+static std::vector<std::string> SplitPath(const char* path) {
+	std::vector<std::string> parts;
+
+	const char* iter = path;
+
+#ifdef _WIN32
+	if (isalpha(path[0]) && path[1] == ':' && pathchar_sep(path[2])) {
+		// Append drive only (eg C:)
+		parts.emplace_back(path, 2);
+		iter += 2;
+		while (pathchar_sep(*iter))
+			iter++;
+	}
+#endif
+
+	if (pathchar_sep(*iter)) {
+		parts.emplace_back(PATH_SEP_STR);
+		while (pathchar_sep(*iter))
+			iter++;
+	}
+
+	while (*iter) {
+		const char* start = iter;
+		while (*iter && !pathchar_sep(*iter))
+			iter++;
+		if (iter != start)
+			parts.emplace_back(start, iter - start);
+		while (pathchar_sep(*iter))
+			iter++;
+	}
+	return parts;
+}
+
+bool UTIL_Relatize2(char* buffer, size_t maxlen, const char* path1, const char* path2)
+{
+	auto parts1 = SplitPath(path1);
+	auto parts2 = SplitPath(path2);
+
+	// If this fails, paths were not relative or have different drives.
+	if (parts1[0] != parts2[0])
+		return false;
+
+	// Skip past identical paths.
+	size_t cursor = 1;
+	while (true) {
+		if (cursor >= parts1.size() || cursor >= parts2.size())
+			break;
+		if (!ComparePathComponent(parts1[cursor], parts2[cursor]))
+			break;
+		cursor++;
+	}
+
+	std::string new_path;
+	for (size_t i = cursor; i < parts1.size(); i++)
+		new_path += ".."s + PATH_SEP_STR;
+	for (size_t i = cursor; i < parts2.size(); i++) {
+		new_path += parts2[i];
+		if (i != parts2.size() - 1)
+			new_path += PATH_SEP_STR;
+	}
+	if (pathchar_sep(path2[strlen(path2) - 1]))
+		new_path += PATH_SEP_STR;
+
+	snprintf(buffer, maxlen, "%s", new_path.c_str());
+	return true;
+}
+
+static inline bool PathExists(const char* path) {
+#ifdef _WIN32
+	return _access(path, 0) == 0 || errno != ENOENT;
+#else
+	return access(path, F_OK) == 0 || errno != ENOENT;
+#endif
+}
+
+bool UTIL_Relatize(char buffer[], size_t maxlength, const char *relTo, const char *relFrom)
+{
+	if (UTIL_BadRelatize(buffer, maxlength, relTo, relFrom)) {
+		if (PathExists(buffer))
+			return true;
+	}
+	return UTIL_Relatize2(buffer, maxlength, relTo, relFrom);
+}

core/metamod_util.h

@@ -80,10 +80,12 @@ size_t UTIL_FormatArgs(char *buffer, size_t maxlength, const char *fmt, va_list
  * @param relFrom		Source file or folder to use as a target.
  * @return				True on success, false on failure.
  */
-bool UTIL_Relatize(char buffer[],
+bool UTIL_Relatize(char buffer[], size_t maxlength, const char *relTo, const char *relFrom);
-				   size_t maxlength,
+
-				   const char *relTo,
+// The previous version of Relatize is broken. Do not use it. We include it for
-				   const char *relFrom);
+// backwards compatibility in old engines only, in case there are weird path
+// scenarios going on.
+bool UTIL_Relatize2(char buffer[], size_t maxlength, const char *relTo, const char *relFrom);
 
 /**
  * @brief Compares memory address against a signature.

core/provider/provider_ep2.cpp

@@ -540,6 +540,8 @@ int BaseProvider::DetermineSourceEngine()
 	return SOURCE_ENGINE_BMS;
 #elif SOURCE_ENGINE == SE_EPISODEONE
 	return g_bOriginalEngine ? SOURCE_ENGINE_ORIGINAL : SOURCE_ENGINE_EPISODEONE;
+#elif SOURCE_ENGINE == SE_MOCK
+	return SOURCE_ENGINE_MOCK;
 #else
 #error "SOURCE_ENGINE not defined to a known value"
 #endif
@@ -671,6 +673,8 @@ const char *BaseProvider::GetEngineDescription() const
 	{
 		return "Episode 1 (2004)";
 	}
+#elif SOURCE_ENGINE == SE_MOCK
+	return "Mock";
 #else
 #error "SOURCE_ENGINE not defined to a known value"
 #endif

loader/loader.cpp

@@ -91,6 +91,7 @@ static const char *backend_names[] =
 	"2.contagion",
 	"2.bms",
 	"2.doi",
+	"2.mock",
 };
 
 #if defined _WIN32
@@ -425,6 +426,10 @@ mm_DetermineBackend(QueryValveInterface engineFactory, QueryValveInterface serve
 					{
 						return MMBackend_HL2DM;
 					}
+					else if (strcmp(game_name, ".") == 0 && engineFactory("MOCK_ENGINE", NULL))
+					{
+						return MMBackend_Mock;
+					}
 					else
 					{
 						return MMBackend_SDK2013;

loader/loader.h

@@ -104,6 +104,7 @@ enum MetamodBackend
 	MMBackend_BMS,
 	MMBackend_DOI,
 
+	MMBackend_Mock,
 	MMBackend_UNKNOWN
 };
 

loader/serverplugin.cpp

@@ -91,6 +91,8 @@ public:
 			mm_GetGameName(game_name, sizeof(game_name));
 
 			mm_backend = mm_DetermineBackend(engineFactory, gsFactory, game_name);
+			if (mm_backend == MMBackend_Mock)
+				strcpy(game_name, "mock");
 		}
 
 		if (mm_backend == MMBackend_UNKNOWN)