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string.c: mrb_str_to_cstr() should always return a mutable string.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-08-18 21:40:10 +09:00
parent 20635e6bdc
commit ef66406c50
1 changed files with 8 additions and 1 deletions
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src/string.c
+8 -1
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@@ -835,8 +835,15 @@ mrb_str_to_cstr(mrb_state *mrb, mrb_value str0)
{
struct RString *s;
const char *p = RSTRING_PTR(str0);
size_t len = RSTRING_LEN(str0);
check_null_byte(mrb, str0);
s = str_new(mrb, RSTRING_PTR(str0), RSTRING_LEN(str0));
if (RSTR_EMBEDDABLE_P(len)) {
s = str_init_embed(mrb_obj_alloc_string(mrb), p, len);
}
else {
s = str_init_normal(mrb, mrb_obj_alloc_string(mrb), p, len);
}
return RSTR_PTR(s);
}