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/* 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
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