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Set empty strings to ASCII-only

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Nobuyoshi Nakada 2024-05-28 16:24:21 +09:00
parent 43798e0f6d
commit 0a92c9f2b0
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GPG Key ID: 3582D74E1FEE4465
1 changed files with 7 additions and 1 deletions
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8
string.c
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@ -931,6 +931,7 @@ empty_str_alloc(VALUE klass)
RUBY_DTRACE_CREATE_HOOK(STRING, 0);
VALUE str = str_alloc_embed(klass, 0);
memset(RSTRING(str)->as.embed.ary, 0, str_embed_capa(str));
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
return str;
}
@ -1552,6 +1553,7 @@ str_new_frozen_buffer(VALUE klass, VALUE orig, int copy_encoding)
STR_SET_EMBED(str);
memcpy(RSTRING_PTR(str), RSTRING_PTR(orig), RSTRING_LEN(orig));
STR_SET_LEN(str, RSTRING_LEN(orig));
ENC_CODERANGE_SET(str, ENC_CODERANGE(orig));
TERM_FILL(RSTRING_END(str), TERM_LEN(orig));
}
else {
@ -3199,7 +3201,11 @@ rb_str_set_len(VALUE str, long len)
}
int cr = ENC_CODERANGE(str);
if (cr == ENC_CODERANGE_UNKNOWN) {
if (len == 0) {
/* Empty string does not contain non-ASCII */
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
}
else if (cr == ENC_CODERANGE_UNKNOWN) {
/* Leave unknown. */
}
else if (len > RSTRING_LEN(str)) {