diff options
author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-17 11:24:09 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-17 11:24:09 +0000 |
commit | 5a6a502ef9d88a77f701be8e0dde8fa489eb1e1f (patch) | |
tree | 89388b2f055743605308c11f382a87f40d8b2097 /string.c | |
parent | d092fc539831062af3b87d2f4e29e94da3cc9b0e (diff) |
string.c: fix rb_str_init
* string.c (rb_str_init): fix segfault and memory leak, consider
wide char encoding terminator.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'string.c')
-rw-r--r-- | string.c | 48 |
1 files changed, 29 insertions, 19 deletions
@@ -163,6 +163,7 @@ static VALUE str_new_shared(VALUE klass, VALUE str); static VALUE str_new_frozen(VALUE klass, VALUE orig); static VALUE str_new_static(VALUE klass, const char *ptr, long len, int encindex); static void str_make_independent_expand(VALUE str, long len, long expand, const int termlen); +static inline void str_modifiable(VALUE str); static inline void str_make_independent(VALUE str) @@ -1367,8 +1368,9 @@ static VALUE rb_str_init(int argc, VALUE *argv, VALUE str) { static ID keyword_ids[2]; - VALUE orig, opt, enc, vcapa; + VALUE orig, opt, venc, vcapa; VALUE kwargs[2]; + rb_encoding *enc = 0; int n; if (!keyword_ids[0]) { @@ -1379,45 +1381,53 @@ rb_str_init(int argc, VALUE *argv, VALUE str) n = rb_scan_args(argc, argv, "01:", &orig, &opt); if (!NIL_P(opt)) { rb_get_kwargs(opt, keyword_ids, 0, 2, kwargs); - enc = kwargs[0]; + venc = kwargs[0]; vcapa = kwargs[1]; + if (venc != Qundef && !NIL_P(venc)) { + enc = rb_to_encoding(venc); + } if (vcapa != Qundef && !NIL_P(vcapa)) { long capa = NUM2LONG(vcapa); - str_discard(str); + long len = 0; + int termlen = enc ? rb_enc_mbminlen(enc) : 1; + if (capa < STR_BUF_MIN_SIZE) { capa = STR_BUF_MIN_SIZE; } if (n == 1) { - long len = RSTRING_LEN(orig); + StringValue(orig); + len = RSTRING_LEN(orig); if (capa < len) { capa = len; } - RSTRING(str)->as.heap.ptr = ALLOC_N(char, capa+1); - memcpy(RSTRING(str)->as.heap.ptr, RSTRING_PTR(orig), RSTRING_LEN(orig)); - RSTRING(str)->as.heap.len = len; - rb_enc_cr_str_exact_copy(str, orig); + if (orig == str) n = 0; } - else { - RSTRING(str)->as.heap.ptr = ALLOC_N(char, capa+1); - RSTRING(str)->as.heap.ptr[0] = '\0'; + str_modifiable(str); + if (STR_EMBED_P(str)) { /* make noembed always */ + RSTRING(str)->as.heap.ptr = ALLOC_N(char, capa+termlen); + } + else if (STR_HEAP_SIZE(str) != capa+termlen) { + REALLOC_N(RSTRING(str)->as.heap.ptr, char, capa+termlen); + } + RSTRING(str)->as.heap.len = len; + TERM_FILL(&RSTRING(str)->as.heap.ptr[len], termlen); + if (n == 1) { + memcpy(RSTRING(str)->as.heap.ptr, RSTRING_PTR(orig), len); + rb_enc_cr_str_exact_copy(str, orig); } FL_SET(str, STR_NOEMBED); RSTRING(str)->as.heap.aux.capa = capa; } else if (n == 1) { - StringValue(orig); - str_discard(str); - str_replace(str, orig); + rb_str_replace(str, orig); } - if (enc != Qundef && !NIL_P(enc)) { - rb_enc_associate(str, rb_to_encoding(enc)); + if (enc) { + rb_enc_associate(str, enc); ENC_CODERANGE_CLEAR(str); } } else if (n == 1) { - StringValue(orig); - str_discard(str); - str_replace(str, orig); + rb_str_replace(str, orig); } return str; } |