Implement JPEG image object support.

pdfio-private.h

@@ -18,8 +18,51 @@
 #  include <stdarg.h>
 #  include <errno.h>
 #  include <inttypes.h>
-#  include <fcntl.h>
-#  include <unistd.h>
+#  ifdef _WIN32
+#    include <io.h>
+#    include <direct.h>
+
+/*
+ * Microsoft renames the POSIX functions to _name, and introduces
+ * a broken compatibility layer using the original names.  As a result,
+ * random crashes can occur when, for example, strdup() allocates memory
+ * from a different heap than used by malloc() and free().
+ *
+ * To avoid moronic problems like this, we #define the POSIX function
+ * names to the corresponding non-standard Microsoft names.
+ */
+
+#    define access	_access
+#    define close	_close
+#    define fileno	_fileno
+#    define lseek	_lseek
+#    define mkdir(d,p)	_mkdir(d)
+#    define open	_open
+#    define read	_read
+#    define rmdir	_rmdir
+#    define snprintf	_snprintf
+#    define strdup	_strdup
+#    define unlink	_unlink
+#    define vsnprintf	_vsnprintf
+#    define write	_write
+
+/*
+ * Map various parameters for POSIX...
+ */
+
+#    define F_OK	00
+#    define W_OK	02
+#    define R_OK	04
+#    define O_RDONLY	_O_RDONLY
+#    define O_WRONLY	_O_WRONLY
+#    define O_CREAT	_O_CREAT
+#    define O_TRUNC	_O_TRUNC
+#    define O_BINARY	_O_BINARY
+#  else // !_WIN32
+#    include <fcntl.h>
+#    include <unistd.h>
+#    define O_BINARY	0
+#  endif // _WIN32
 #  include <string.h>
 #  include <ctype.h>
 #  include <zlib.h>