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diff --git a/tboot/include/ctype.h b/tboot/include/ctype.h
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+/*
+ * Copyright (c) 2010, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of the Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __CTYPE_H__
+#define __CTYPE_H__
+
+#include <stdbool.h>
+#include <types.h>
+#include <compiler.h>
+
+/* from:
+ * http://fxr.watson.org/fxr/source/dist/acpica/acutils.h?v=NETBSD5
+*/
+#define CTYPE_SIZE 257
+const uint8_t _ctype[CTYPE_SIZE];
+
+#define _XA 0x00 /* extra alphabetic - not supported */
+#define _XS 0x40 /* extra space */
+#define _BB 0x00 /* BEL, BS, etc. - not supported */
+#define _CN 0x20 /* CR, FF, HT, NL, VT */
+#define _DI 0x04 /* ''-'9' */
+#define _LO 0x02 /* 'a'-'z' */
+#define _PU 0x10 /* punctuation */
+#define _SP 0x08 /* space */
+#define _UP 0x01 /* 'A'-'Z' */
+#define _XD 0x80 /* ''-'9', 'A'-'F', 'a'-'f' */
+
+static always_inline bool isdigit(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_DI));
+}
+static always_inline bool isspace(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_SP));
+}
+static always_inline bool isxdigit(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_XD));
+}
+static always_inline bool isupper(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_UP));
+}
+static always_inline bool islower(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_LO));
+}
+static always_inline bool isprint(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_LO | _UP | _DI |
+ _SP | _PU));
+}
+static always_inline bool isalpha(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_LO | _UP));
+}
+static always_inline bool iscntrl(int c)
+{
+ return (_ctype[(unsigned char)(c)] & (_CN));
+}
+
+
+#endif /* __CTYPE_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */