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mruby-string-ext/string.c: reduce UTF-8 table size.

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Yukihiro "Matz" Matsumoto
2022-05-25 11:22:28 +09:00
parent 2f4695b759
commit be0b5f8cee
1 changed files with 4 additions and 10 deletions
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mrbgems/mruby-string-ext/src/string.c
+4 -10
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@@ -989,16 +989,10 @@ mrb_str_succ(mrb_state *mrb, mrb_value self)
}
#ifdef MRB_UTF8_STRING
static const char utf8len_codepage_zero[256] =
static const char utf8len_table[] =
{
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,
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
};
static mrb_int
@@ -1009,7 +1003,7 @@ utf8code(unsigned char* p, mrb_int limit)
if (p[0] < 0x80)
return p[0];
len = utf8len_codepage_zero[p[0]];
len = 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);