+#if PLATFORM_UNIX
+#include <sys/types.h>
+#include <pwd.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <dirent.h>
+
+// some but not all of this is code from PhysicsFS: http://icculus.org/physfs/
+// the zlib license on physfs allows this cut-and-pasting.
+static int locateOneElement(char *buf)
+{
+ char *ptr;
+ char **rc;
+ char **i;
+ DIR *dirp;
+
+ //if (PHYSFS_exists(buf))
+ if (access(buf, F_OK) == 0)
+ return(1); /* quick rejection: exists in current case. */
+
+ ptr = strrchr(buf, '/'); /* find entry at end of path. */
+ if (ptr == NULL)
+ {
+ dirp = opendir(".");
+ ptr = buf;
+ } /* if */
+ else
+ {
+ *ptr = '\0';
+ dirp = opendir(buf);
+ *ptr = '/';
+ ptr++; /* point past dirsep to entry itself. */
+ } /* else */
+
+ struct dirent *dent;
+ while ((dent = readdir(dirp)) != NULL)
+ {
+ if (strcasecmp(dent->d_name, ptr) == 0)
+ {
+ strcpy(ptr, dent->d_name); /* found a match. Overwrite with this case. */
+ closedir(dirp);
+ return(1);
+ } /* if */
+ } /* for */
+
+ /* no match at all... */
+ closedir(dirp);
+ return(0);
+} /* locateOneElement */
+
+
+static inline const char *getUserDirByUID(void)
+{
+ struct passwd *pw = getpwuid(getuid());
+ if (pw != NULL)
+ return(pw->pw_dir);
+ return(NULL);
+} /* getUserDirByUID */
+
+
+static inline const char *getPrefPath(void)
+{
+ static char *prefpath = NULL;
+ if (prefpath == NULL)
+ {
+ const char *homedir = getenv("HOME");
+ if (homedir == NULL)
+ homedir = getUserDirByUID();
+ if (homedir == NULL)
+ homedir = "."; // oh well.
+
+#if (defined(__APPLE__) && defined(__MACH__))
+ const char *PREFPATHNAME = "Library/Application Support/Lugaru";
+#else
+ const char *PREFPATHNAME = ".lugaru";
+#endif
+ size_t len = strlen(homedir) + strlen(PREFPATHNAME) + 2;
+ prefpath = new char[len];
+ snprintf(prefpath, len, "%s/%s", homedir, PREFPATHNAME);
+ }
+ return(prefpath);
+}
+
+static int locateCorrectCase(char *buf, bool makedirs)
+{
+ int rc;
+ char *ptr;
+ char *prevptr;
+
+ ptr = prevptr = buf;
+ while (ptr = strchr(ptr + 1, '/'))
+ {
+ *ptr = '\0'; /* block this path section off */
+ rc = locateOneElement(buf);
+ if (!rc)
+ {
+ if (makedirs) /* normal if we're writing; build dirs! */
+ mkdir(buf, S_IRWXU);
+ else
+ {
+ *ptr = '/'; /* restore path separator */
+ return(-2); /* missing element in path. */
+ } /* else */
+ } /* if */
+ *ptr = '/'; /* restore path separator */
+ } /* while */
+
+ /* check final element... */
+ return(locateOneElement(buf) ? 0 : -1);
+}
+
+
+static int locateCorrectFile(char *buf, const char *mode)
+{
+ if (*buf == '\0')
+ return(0); /* Uh...I guess that's failure. */
+
+ assert((mode[0] == 'w') || (mode[0] == 'r'));
+
+ bool iswriting = (mode[0] == 'w');
+ const char *prefpath = getPrefPath();
+ size_t len = strlen(buf) + strlen(prefpath) + 2;
+ char *prefpathfile = (char *) alloca(len);
+ snprintf(prefpathfile, len, "%s/%s", prefpath, buf);
+
+ int rc = locateCorrectCase(prefpathfile, iswriting); /* favor prefpath. */
+ if ( (rc == 0) || ((rc == -1) && (iswriting)) ) // found or create?
+ strcpy(buf, prefpathfile);
+ else if ((rc < 0) && (!iswriting)) /* not writing? Try game dir... */
+ rc = locateCorrectCase(buf, iswriting);
+
+ return(rc);
+} /* locateCorrectFile */
+#endif
+
+
+static char g_filename[4096];
+char* ConvertFileName( const char* orgfilename, const char *mode)