First commitHEAD1.0master

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 163 insertions, 0 deletions

diff --git a/common.h b/common.h
new file mode 100644
index 0000000..3faa5bf
--- /dev/null
+++ b/common.h
@@ -0,0 +1,163 @@
+/* See LICENSE file for copyright and license details. */
+#include "libutf8.h"
+
+
+#if defined(__clang__)
+# pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
+# pragma clang diagnostic ignored "-Wimplicit-fallthrough"
+#endif
+
+#if defined(__GNUC__)
+# pragma GCC diagnostic ignored "-Winline"
+#endif
+
+
+#define DECODE(LENGTH_CHECK)\
+	do {\
+		static const uint_least32_t limits[] = {\
+			(UINT32_C(1) <<  0),\
+			(UINT32_C(1) <<  7),\
+			(UINT32_C(1) << 11),\
+			(UINT32_C(1) << 16),\
+			(UINT32_C(1) << 21),\
+			(UINT32_C(1) << 26),\
+			(UINT32_C(1) << 31)\
+		};\
+		\
+		uint_least32_t codepoint, lower_limit;\
+		unsigned char c;\
+		size_t n, char_len = 0u;\
+		\
+		c = ((const unsigned char *)text)[char_len++];\
+		\
+		n = 0u;\
+		while (c & 0x80u) {\
+			c = (unsigned char)(c << 1);\
+			n += 1u;\
+		}\
+		\
+		if (n == 0u) {\
+			codepoint = (uint_least32_t)c;\
+			goto out;\
+		}\
+		if (n == 1u || n >= sizeof(limits) / sizeof(*limits))\
+			return 0u;\
+		\
+		LENGTH_CHECK\
+		\
+		lower_limit = limits[n - 1u];\
+		\
+		codepoint = (uint_least32_t)((c & 0xFFu) >> n);\
+		while (--n) {\
+			c = ((const unsigned char *)text)[char_len++];\
+			if ((c & 0xC0u) != 0x80u)\
+				return 0u;\
+			codepoint <<= 6;\
+			codepoint |= (uint_least32_t)(c & 0x3Fu);\
+		}\
+		\
+		if (codepoint < lower_limit && !(flags & LIBUTF8_ALLOW_LONG_ENCODING))\
+			if (codepoint || char_len > 2u || !(flags & LIBUTF8_ALLOW_2BYTE_NULL))\
+				return 0u;\
+		\
+		if (codepoint > LIBUTF8_ULTIMATE_CODEPOINT) {\
+			if (!(flags & LIBUTF8_ALLOW_31_BITS) || codepoint >> 31)\
+				return 0u;\
+		} else if (flags & LIBUTF8_REPLACE_INVALID) {\
+			if (libutf8_is_noncharacter(codepoint) || libutf8_is_surrogate(codepoint))\
+				codepoint = LIBUTF8_REPLACEMENT_CHARACTER_CODEPOINT;\
+		} else if (!(flags & LIBUTF8_RETURN_INVALID)) {\
+			if (libutf8_is_noncharacter(codepoint) || libutf8_is_surrogate(codepoint))\
+				return 0u;\
+		}\
+		\
+	out:\
+		if (codepoint_out)\
+			*codepoint_out = codepoint;\
+		return char_len;\
+	} while (0)
+
+
+#define ENCODE(N)\
+	do {\
+		switch (N) {\
+		default:\
+			break;\
+		case 1u:\
+			out_buffer[0u] = (char)codepoint;\
+			break;\
+		case 6u:\
+			out_buffer[5u] = (char)(0x80u | ((unsigned char)(codepoint & 0x3Fu)));\
+			codepoint >>= 6;\
+			/* fall through */\
+		case 5u:\
+			out_buffer[4u] = (char)(0x80u | ((unsigned char)(codepoint & 0x3Fu)));\
+			codepoint >>= 6;\
+			/* fall through */\
+		case 4u:\
+			out_buffer[3u] = (char)(0x80u | ((unsigned char)(codepoint & 0x3Fu)));\
+			codepoint >>= 6;\
+			/* fall through */\
+		case 3u:\
+			out_buffer[2u] = (char)(0x80u | ((unsigned char)(codepoint & 0x3Fu)));\
+			codepoint >>= 6;\
+			/* fall through */\
+		case 2u:\
+			out_buffer[1u] = (char)(0x80u | ((unsigned char)(codepoint & 0x3Fu)));\
+			codepoint >>= 6;\
+			\
+			out_buffer[0u] = (char)(((0xFFu << (8u - (N))) & 0xFFu) | codepoint);\
+			break;\
+		}\
+	 } while (0)
+
+
+#ifdef TEST
+# ifdef __linux__
+#  include <sys/prctl.h>
+# endif
+# include <sys/resource.h>
+# include <assert.h>
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+# include <time.h>
+# include <unistd.h>
+
+# define ARM_ALARM()\
+	do {\
+		unsigned int alarm_time__ = alarm(10u);\
+		if (alarm_time__ > 10u)\
+			alarm(alarm_time__);\
+	} while (0)
+
+# if defined(PR_SET_DUMPABLE)
+#  define DISABLE_COREDUMP()\
+	do {\
+		struct rlimit rl__;\
+		rl__.rlim_cur = 0;\
+		rl__.rlim_max = 0;\
+		(void) setrlimit(RLIMIT_CORE, &rl__);\
+		(void) prctl(PR_SET_DUMPABLE, 0);\
+	} while (0)
+# else
+#  define DISABLE_COREDUMP()\
+	do {\
+		struct rlimit rl__;\
+		rl__.rlim_cur = 0;\
+		rl__.rlim_max = 0;\
+		(void) setrlimit(RLIMIT_CORE, &rl__);\
+	} while (0)
+# endif
+
+# define SEED_RAND()\
+	srand((unsigned)time(NULL))
+
+# define SET_UP_TEST()\
+	do {\
+		ARM_ALARM();\
+		DISABLE_COREDUMP();\
+		SEED_RAND();\
+	} while (0)
+
+#endif