C++ (Cpp) pg_ascii_tolower Examples

Example #1

File: like.c Project: AllenDou/postgresql

/*
 * We do handle case-insensitive matching for single-byte encodings using
 * fold-on-the-fly processing, however.
 */
static char
SB_lower_char(unsigned char c, pg_locale_t locale, bool locale_is_c)
{
	if (locale_is_c)
		return pg_ascii_tolower(c);
#ifdef HAVE_LOCALE_T
	else if (locale)
		return tolower_l(c, locale);
#endif
	else
		return pg_tolower(c);
}

Example #2

File: regc_pg_locale.c Project: 42penguins/postgres

static pg_wchar
pg_wc_tolower(pg_wchar c)
{
	switch (pg_regex_strategy)
	{
		case PG_REGEX_LOCALE_C:
			if (c <= (pg_wchar) 127)
				return pg_ascii_tolower((unsigned char) c);
			return c;
		case PG_REGEX_LOCALE_WIDE:
			/* force C behavior for ASCII characters, per comments above */
			if (c <= (pg_wchar) 127)
				return pg_ascii_tolower((unsigned char) c);
#ifdef USE_WIDE_UPPER_LOWER
			if (sizeof(wchar_t) >= 4 || c <= (pg_wchar) 0xFFFF)
				return towlower((wint_t) c);
#endif
			/* FALL THRU */
		case PG_REGEX_LOCALE_1BYTE:
			/* force C behavior for ASCII characters, per comments above */
			if (c <= (pg_wchar) 127)
				return pg_ascii_tolower((unsigned char) c);
			if (c <= (pg_wchar) UCHAR_MAX)
				return tolower((unsigned char) c);
			return c;
		case PG_REGEX_LOCALE_WIDE_L:
#if defined(HAVE_LOCALE_T) && defined(USE_WIDE_UPPER_LOWER)
			if (sizeof(wchar_t) >= 4 || c <= (pg_wchar) 0xFFFF)
				return towlower_l((wint_t) c, pg_regex_locale);
#endif
			/* FALL THRU */
		case PG_REGEX_LOCALE_1BYTE_L:
#ifdef HAVE_LOCALE_T
			if (c <= (pg_wchar) UCHAR_MAX)
				return tolower_l((unsigned char) c, pg_regex_locale);
#endif
			return c;
	}
	return 0;					/* can't get here, but keep compiler quiet */
}