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-rwxr-xr-xcharset.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/charset.h b/charset.h
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--- /dev/null
+++ b/charset.h
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+/*
+ * Copyright (C) 1984-2012 Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+#define IS_ASCII_OCTET(c) (((c) & 0x80) == 0)
+#define IS_UTF8_TRAIL(c) (((c) & 0xC0) == 0x80)
+#define IS_UTF8_LEAD2(c) (((c) & 0xE0) == 0xC0)
+#define IS_UTF8_LEAD3(c) (((c) & 0xF0) == 0xE0)
+#define IS_UTF8_LEAD4(c) (((c) & 0xF8) == 0xF0)
+#define IS_UTF8_LEAD5(c) (((c) & 0xFC) == 0xF8)
+#define IS_UTF8_LEAD6(c) (((c) & 0xFE) == 0xFC)
+#define IS_UTF8_INVALID(c) (((c) & 0xFE) == 0xFE)
+#define IS_UTF8_LEAD(c) (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c))