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string.c: share UTF-8 length table with mruby-string-ext.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2022-05-25 11:25:43 +09:00
parent be0b5f8cee
commit 7cdef2b03e
2 changed files with 8 additions and 11 deletions
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mrbgems/mruby-string-ext/src/string.c
+2 -6
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@@ -989,11 +989,7 @@ mrb_str_succ(mrb_state *mrb, mrb_value self)
}
#ifdef MRB_UTF8_STRING
static const char utf8len_table[] =
{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 0
};
extern const char mrb_utf8len_table[];
static mrb_int
utf8code(unsigned char* p, mrb_int limit)
@@ -1003,7 +999,7 @@ utf8code(unsigned char* p, mrb_int limit)
if (p[0] < 0x80)
return p[0];
len = utf8len_table[p[0]>>3];
len = mrb_utf8len_table[p[0]>>3];
if (len <= limit && len > 1 && (p[1] & 0xc0) == 0x80) {
if (len == 2)
return ((p[0] & 0x1f) << 6) + (p[1] & 0x3f);