contrib: add own locale-independent ctype implementation

Knot.files

@@ -11,6 +11,7 @@ src/contrib/base32hex.c
 src/contrib/base32hex.h
 src/contrib/base64.c
 src/contrib/base64.h
+src/contrib/ctype.h
 src/contrib/dnstap/convert.c
 src/contrib/dnstap/convert.h
 src/contrib/dnstap/dnstap.c

src/Makefile.am

@@ -42,6 +42,7 @@ libcontrib_la_SOURCES = 			\
 	contrib/base32hex.h			\
 	contrib/base64.c			\
 	contrib/base64.h			\
+	contrib/ctype.h				\
 	contrib/dynarray.h			\
 	contrib/endian.h			\
 	contrib/files.c				\

src/contrib/ctype.h

+/*  Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \brief Locale-independent ctype functions.
+ */
+
+#pragma once
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+enum {
+	CT_DIGIT = 1 << 0,
+	CT_UPPER = 1 << 1,
+	CT_LOWER = 1 << 2,
+	CT_XDIGT = 1 << 3,
+	CT_PUNCT = 1 << 4,
+	CT_PRINT = 1 << 5,
+	CT_SPACE = 1 << 6,
+};
+
+static const uint8_t char_mask[256] = {
+	// 0 - 8
+	['\t'] = CT_SPACE,
+	['\n'] = CT_SPACE,
+	['\v'] = CT_SPACE,
+	['\f'] = CT_SPACE,
+	['\r'] = CT_SPACE,
+	// 14 - 31
+	[' ']  = CT_PRINT | CT_SPACE,
+
+	['!']  = CT_PRINT | CT_PUNCT,
+	['"']  = CT_PRINT | CT_PUNCT,
+	['#']  = CT_PRINT | CT_PUNCT,
+	['$']  = CT_PRINT | CT_PUNCT,
+	['%']  = CT_PRINT | CT_PUNCT,
+	['&']  = CT_PRINT | CT_PUNCT,
+	['\''] = CT_PRINT | CT_PUNCT,
+	['(']  = CT_PRINT | CT_PUNCT,
+	[')']  = CT_PRINT | CT_PUNCT,
+	['*']  = CT_PRINT | CT_PUNCT,
+	['+']  = CT_PRINT | CT_PUNCT,
+	[',']  = CT_PRINT | CT_PUNCT,
+	['-']  = CT_PRINT | CT_PUNCT,
+	['.']  = CT_PRINT | CT_PUNCT,
+	['/']  = CT_PRINT | CT_PUNCT,
+
+	['0']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['1']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['2']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['3']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['4']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['5']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['6']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['7']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['8']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+	['9']  = CT_PRINT | CT_DIGIT | CT_XDIGT,
+
+	[':']  = CT_PRINT | CT_PUNCT,
+	[';']  = CT_PRINT | CT_PUNCT,
+	['<']  = CT_PRINT | CT_PUNCT,
+	['=']  = CT_PRINT | CT_PUNCT,
+	['>']  = CT_PRINT | CT_PUNCT,
+	['?']  = CT_PRINT | CT_PUNCT,
+	['@']  = CT_PRINT | CT_PUNCT,
+
+	['A']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['B']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['C']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['D']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['E']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['F']  = CT_PRINT | CT_UPPER | CT_XDIGT,
+	['G']  = CT_PRINT | CT_UPPER,
+	['H']  = CT_PRINT | CT_UPPER,
+	['I']  = CT_PRINT | CT_UPPER,
+	['J']  = CT_PRINT | CT_UPPER,
+	['K']  = CT_PRINT | CT_UPPER,
+	['L']  = CT_PRINT | CT_UPPER,
+	['M']  = CT_PRINT | CT_UPPER,
+	['N']  = CT_PRINT | CT_UPPER,
+	['O']  = CT_PRINT | CT_UPPER,
+	['P']  = CT_PRINT | CT_UPPER,
+	['Q']  = CT_PRINT | CT_UPPER,
+	['R']  = CT_PRINT | CT_UPPER,
+	['S']  = CT_PRINT | CT_UPPER,
+	['T']  = CT_PRINT | CT_UPPER,
+	['U']  = CT_PRINT | CT_UPPER,
+	['V']  = CT_PRINT | CT_UPPER,
+	['W']  = CT_PRINT | CT_UPPER,
+	['X']  = CT_PRINT | CT_UPPER,
+	['Y']  = CT_PRINT | CT_UPPER,
+	['Z']  = CT_PRINT | CT_UPPER,
+
+	['[']  = CT_PRINT | CT_PUNCT,
+	['\\'] = CT_PRINT | CT_PUNCT,
+	[']']  = CT_PRINT | CT_PUNCT,
+	['^']  = CT_PRINT | CT_PUNCT,
+	['_']  = CT_PRINT | CT_PUNCT,
+	['`']  = CT_PRINT | CT_PUNCT,
+
+	['a']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['b']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['c']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['d']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['e']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['f']  = CT_PRINT | CT_LOWER | CT_XDIGT,
+	['g']  = CT_PRINT | CT_LOWER,
+	['h']  = CT_PRINT | CT_LOWER,
+	['i']  = CT_PRINT | CT_LOWER,
+	['j']  = CT_PRINT | CT_LOWER,
+	['k']  = CT_PRINT | CT_LOWER,
+	['l']  = CT_PRINT | CT_LOWER,
+	['m']  = CT_PRINT | CT_LOWER,
+	['n']  = CT_PRINT | CT_LOWER,
+	['o']  = CT_PRINT | CT_LOWER,
+	['p']  = CT_PRINT | CT_LOWER,
+	['q']  = CT_PRINT | CT_LOWER,
+	['r']  = CT_PRINT | CT_LOWER,
+	['s']  = CT_PRINT | CT_LOWER,
+	['t']  = CT_PRINT | CT_LOWER,
+	['u']  = CT_PRINT | CT_LOWER,
+	['v']  = CT_PRINT | CT_LOWER,
+	['w']  = CT_PRINT | CT_LOWER,
+	['x']  = CT_PRINT | CT_LOWER,
+	['y']  = CT_PRINT | CT_LOWER,
+	['z']  = CT_PRINT | CT_LOWER,
+
+	['{']  = CT_PRINT | CT_PUNCT,
+	['|']  = CT_PRINT | CT_PUNCT,
+	['}']  = CT_PRINT | CT_PUNCT,
+	['~']  = CT_PRINT | CT_PUNCT,
+	// 127 - 255
+};
+
+static inline bool is_alnum(uint8_t c)
+{
+	return char_mask[c] & (CT_DIGIT | CT_UPPER | CT_LOWER);
+}
+
+static inline bool is_alpha(uint8_t c)
+{
+	return char_mask[c] & (CT_UPPER | CT_LOWER);
+}
+
+static inline bool is_digit(uint8_t c)
+{
+	return char_mask[c] & CT_DIGIT;
+}
+
+static inline bool is_xdigit(uint8_t c)
+{
+	return char_mask[c] & CT_XDIGT;
+}
+
+static inline bool is_lower(uint8_t c)
+{
+	return char_mask[c] & CT_LOWER;
+}
+
+static inline bool is_upper(uint8_t c)
+{
+	return char_mask[c] & CT_UPPER;
+}
+
+static inline bool is_print(uint8_t c)
+{
+	return char_mask[c] & CT_PRINT;
+}
+
+static inline bool is_punct(uint8_t c)
+{
+	return char_mask[c] & CT_PUNCT;
+}
+
+static inline bool is_space(uint8_t c)
+{
+	return char_mask[c] & CT_SPACE;
+}