diff options
Diffstat (limited to 'py/misc.h')
| -rw-r--r-- | py/misc.h | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -100,7 +100,9 @@ bool unichar_isupper(unichar c); bool unichar_islower(unichar c); unichar unichar_tolower(unichar c); unichar unichar_toupper(unichar c); -#define unichar_charlen(s, bytelen) (bytelen) +machine_uint_t unichar_charlen(const char *str, machine_uint_t len); +#define UTF8_IS_NONASCII(ch) ((ch) & 0x80) +#define UTF8_IS_CONT(ch) (((ch) & 0xC0) == 0x80) /** variable string *********************************************/ @@ -164,4 +166,18 @@ int DEBUG_printf(const char *fmt, ...); extern uint mp_verbose_flag; +// This is useful for unicode handling. Some CPU archs has +// special instructions for efficient implentation of this +// function (e.g. CLZ on ARM). +// NOTE: this function is unused at the moment +#ifndef count_lead_ones +static inline uint count_lead_ones(byte val) { + uint c = 0; + for (byte mask = 0x80; val & mask; mask >>= 1) { + c++; + } + return c; +} +#endif + #endif // _INCLUDED_MINILIB_H |