> On Nov 7, 2022, at 3:52 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Sun, 6 Nov 2022 21:41:42 -0800
>>
>> Is there a function that matches regex case-sensitively in a C string? Ie,
>> something like fast_c_string_match_ignore_case but case-sensitive.
>
> I don't think so, but it should be trivial to add such a function if
> you need it.
Cool, I need some help understanding fast_c_string_match_ignore_case:
ptrdiff_t
fast_c_string_match_ignore_case (Lisp_Object regexp,
const char *string, ptrdiff_t len)
{
regexp = string_make_unibyte (regexp);
// Why do we need to unwind stack?
specpdl_ref count = SPECPDL_INDEX ();
struct regexp_cache *cache_entry
= compile_pattern (regexp, 0, Vascii_canon_table, 0, 0);
// What does freezing a pattern do?
freeze_pattern (cache_entry);
// What is re_match_object for? I see that it can be t, nil or a string.
re_match_object = Qt;
//
ptrdiff_t val = re_search (&cache_entry->buf, string, len, 0, len, 0);
unbind_to (count, Qnil);
return val;
}
Yuan
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