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--- directory.cpp.orig Mon Dec 9 11:29:11 2002
+++ directory.cpp Wed Jul 19 11:41:32 2006
@@ -1,7 +1,9 @@
#include <cctype>
#include <dirent.h>
+#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <fcntl.h>
#include "directory.h"
@@ -37,19 +39,24 @@
bool
ttfdirectory::select (const char *name) const
{
- int len;
+ int fd;
+ unsigned int n;
struct stat buf;
+ char sigdata[8];
+ char TTsig[] = "\000\001\000\000\000", OTsig[] = "OTTO";
/* must be a regular file */
if (::stat (name, &buf) || !(S_ISREG (buf.st_mode))) {
return false;
}
-
- /* we make the decision by the extension of the file name */
- return (((len = strlen (name)) > 4) &&
- (name[len - 4] == '.') &&
- (std::toupper(name[len - 3]) == 'T') &&
- (std::toupper(name[len - 2]) == 'T') &&
- ((std::toupper(name[len - 1]) == 'F') ||
- (std::toupper(name[len - 1]) == 'C')));
+
+ fd = ::open(name, O_RDONLY);
+ if (fd < 0) return false;
+ n = read(fd, sigdata, sizeof(sigdata));
+ close(fd);
+ if (n < sizeof(sigdata))
+ return false;
+
+ return (!memcmp(sigdata, TTsig, 5)
+ || !memcmp(sigdata, OTsig, 4));
}
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