fix various warning

add b3ResourcePath utility, to locate resources relative to executable
2015-07-03 18:17:14 -07:00
parent 4a9441c5fd
commit 8517e85b21
18 changed files with 176 additions and 92 deletions
--- a/examples/Utils/b3ResourcePath.cpp
+++ b/examples/Utils/b3ResourcePath.cpp
@@ -0,0 +1,80 @@
+#include "b3ResourcePath.h"
+#include "Bullet3Common/b3Logging.h"
+#ifdef __APPLE__
+#include <mach-o/dyld.h>	/* _NSGetExecutablePath */
+#else
+#ifdef _WIN32
+#else
+//not Mac, not Windows, let's cross the fingers it is Linux :-)
+#include <unistd.h>
+#endif
+#endif
+
+
+#include "Bullet3Common/b3FileUtils.h"
+#define B3_MAX_EXE_PATH_LEN 4096
+
+int b3ResourcePath::getExePath(char* path, int maxPathLenInBytes)
+{
+	int numBytes = 0;
+
+#if __APPLE__
+ uint32_t  bufsize = uint32_t(maxPathLenInBytes);
+
+	if (_NSGetExecutablePath(path, &bufsize)!=0)
+	{
+		b3Warning("Cannot find executable path\n");
+		return false;
+	} else
+	{
+		numBytes = strlen(path);
+	}
+#else
+#ifdef _WIN32
+#error not yet
+#else
+	numBytes = (int)readlink("/proc/self/exe", path, maxPathLenInBytes-1);
+	if (numBytes > 0) 
+	{
+		path[numBytes] = 0;
+	} else
+	{
+		b3Warning("Cannot find executable path\n");
+	}
+#endif //_WIN32
+#endif //__APPLE__
+
+	return numBytes;
+}
+
+int b3ResourcePath::findResourcePath(const char* resourceName, char* resourcePath, int resourcePathMaxNumBytes)
+{
+	//first find in a resource/<exeName> location, then in various folders within 'data' using b3FileUtils
+	char exePath[B3_MAX_EXE_PATH_LEN];
+
+	int l = b3ResourcePath::getExePath(exePath, B3_MAX_EXE_PATH_LEN);
+	if (l)
+	{
+ 		char pathToExe[B3_MAX_EXE_PATH_LEN];
+
+        	int exeNamePos = b3FileUtils::extractPath(exePath,pathToExe,B3_MAX_EXE_PATH_LEN);
+        	if (exeNamePos)
+        	{
+			sprintf(resourcePath,"%s../resources/%s/%s",pathToExe,&exePath[exeNamePos],resourceName);
+			//printf("try resource at %s\n", resourcePath);	
+			if (b3FileUtils::findFile(resourcePath, resourcePath, resourcePathMaxNumBytes))
+			{
+				return strlen(resourcePath);
+			}
+        	}
+	}
+
+	bool res = b3FileUtils::findFile(resourceName, resourcePath, resourcePathMaxNumBytes);
+	if (res)
+        {
+                return strlen(resourcePath);
+        }
+
+	return 0;
+}
+