diff options
| -rw-r--r-- | src/nvim/regexp.c | 77 |
1 files changed, 41 insertions, 36 deletions
diff --git a/src/nvim/regexp.c b/src/nvim/regexp.c index 847b2f273e..ae611a0005 100644 --- a/src/nvim/regexp.c +++ b/src/nvim/regexp.c @@ -3316,6 +3316,47 @@ bt_regexec_nl ( return (int)r; } +/// Wrapper around strchr which accounts for case-insensitive searches and +/// non-ASCII characters. +/// +/// This function is used a lot for simple searches, keep it fast! +/// +/// @param s string to search +/// @param c character to find in @a s +/// +/// @return NULL if no match, otherwise pointer to the position in @a s +static inline char_u *cstrchr(const char_u *const s, const int c) + FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_NONNULL_ALL + FUNC_ATTR_ALWAYS_INLINE +{ + if (!rex.reg_ic) { + return vim_strchr(s, c); + } + + // Use folded case for UTF-8, slow! For ASCII use libc strpbrk which is + // expected to be highly optimized. + if (c > 0x80) { + const int folded_c = utf_fold(c); + for (const char_u *p = s; *p != NUL; p += utfc_ptr2len(p)) { + if (utf_fold(utf_ptr2char(p)) == folded_c) { + return (char_u *)p; + } + } + return NULL; + } + + int cc; + if (ASCII_ISUPPER(c)) { + cc = TOLOWER_ASC(c); + } else if (ASCII_ISLOWER(c)) { + cc = TOUPPER_ASC(c); + } else { + return vim_strchr(s, c); + } + + char tofind[] = { (char)c, (char)cc, NUL }; + return (char_u *)strpbrk((const char *)s, tofind); +} /// Matches a regexp against multiple lines. /// "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). @@ -6320,42 +6361,6 @@ static int cstrncmp(char_u *s1, char_u *s2, int *n) return result; } -/* - * cstrchr: This function is used a lot for simple searches, keep it fast! - */ -static inline char_u *cstrchr(const char_u *const s, const int c) - FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_NONNULL_ALL - FUNC_ATTR_ALWAYS_INLINE -{ - if (!rex.reg_ic) { - return vim_strchr(s, c); - } - - // Use folded case for UTF-8, slow! For ASCII use libc strpbrk which is - // expected to be highly optimized. - if (c > 0x80) { - const int folded_c = utf_fold(c); - for (const char_u *p = s; *p != NUL; p += utfc_ptr2len(p)) { - if (utf_fold(utf_ptr2char(p)) == folded_c) { - return (char_u *)p; - } - } - return NULL; - } - - int cc; - if (ASCII_ISUPPER(c)) { - cc = TOLOWER_ASC(c); - } else if (ASCII_ISLOWER(c)) { - cc = TOUPPER_ASC(c); - } else { - return vim_strchr(s, c); - } - - char tofind[] = { (char)c, (char)cc, NUL }; - return (char_u *)strpbrk((const char *)s, tofind); -} - /*************************************************************** * regsub stuff * ***************************************************************/ |