зеркало из https://github.com/github/ruby.git
* string.c (str_replace_shared): replaces string with sharing.
* string.c (rb_str_new4, rb_str_associate, rb_str_associated): allows associated strings shared. * string.c (rb_str_dup, rb_str_substr, rb_str_replace): shares memory. [ruby-core:15400] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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10
ChangeLog
10
ChangeLog
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@ -1,3 +1,13 @@
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Thu Feb 7 16:33:48 2008 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* string.c (str_replace_shared): replaces string with sharing.
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* string.c (rb_str_new4, rb_str_associate, rb_str_associated): allows
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associated strings shared.
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* string.c (rb_str_dup, rb_str_substr, rb_str_replace): shares memory.
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[ruby-core:15400]
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Thu Feb 7 15:42:42 2008 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* string.c (rb_str_end_with): compares with the suffix.
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82
string.c
82
string.c
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@ -345,10 +345,8 @@ rb_tainted_str_new2(const char *ptr)
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}
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static VALUE
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str_new_shared(VALUE klass, VALUE str)
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str_replace_shared(VALUE str2, VALUE str)
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{
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VALUE str2 = str_alloc(klass);
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if (RSTRING_LEN(str) <= RSTRING_EMBED_LEN_MAX) {
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STR_SET_EMBED(str2);
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memcpy(RSTRING_PTR(str2), RSTRING_PTR(str), RSTRING_LEN(str)+1);
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@ -365,6 +363,12 @@ str_new_shared(VALUE klass, VALUE str)
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return str2;
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}
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static VALUE
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str_new_shared(VALUE klass, VALUE str)
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{
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return str_replace_shared(str_alloc(klass), str);
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}
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static VALUE
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str_new3(VALUE klass, VALUE str)
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{
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@ -412,24 +416,32 @@ rb_str_new4(VALUE orig)
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if (OBJ_FROZEN(orig)) return orig;
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klass = rb_obj_class(orig);
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if (STR_SHARED_P(orig) && (str = RSTRING(orig)->as.heap.aux.shared)
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&& klass == RBASIC(str)->klass) {
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if (STR_SHARED_P(orig) && (str = RSTRING(orig)->as.heap.aux.shared)) {
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long ofs;
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ofs = RSTRING_LEN(str) - RSTRING_LEN(orig);
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if ((ofs > 0) || (!OBJ_TAINTED(str) && OBJ_TAINTED(orig))) {
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if ((ofs > 0) || (klass != RBASIC(str)->klass) ||
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(!OBJ_TAINTED(str) && OBJ_TAINTED(orig))) {
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str = str_new3(klass, str);
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RSTRING(str)->as.heap.ptr += ofs;
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RSTRING(str)->as.heap.len -= ofs;
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}
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OBJ_INFECT(str, orig);
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}
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else if (STR_ASSOC_P(orig) || STR_EMBED_P(orig)) {
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else if (STR_EMBED_P(orig)) {
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str = str_new(klass, RSTRING_PTR(orig), RSTRING_LEN(orig));
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rb_enc_copy(str, orig);
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OBJ_INFECT(str, orig);
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}
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else if (STR_ASSOC_P(orig)) {
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VALUE assoc = RSTRING(orig)->as.heap.aux.shared;
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FL_UNSET(orig, STR_ASSOC);
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str = str_new4(klass, orig);
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FL_SET(str, STR_ASSOC);
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RSTRING(str)->as.heap.aux.shared = assoc;
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}
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else {
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str = str_new4(klass, orig);
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}
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OBJ_INFECT(str, orig);
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OBJ_FREEZE(str);
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return str;
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}
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@ -552,9 +564,7 @@ static VALUE rb_str_replace(VALUE, VALUE);
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VALUE
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rb_str_dup(VALUE str)
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{
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VALUE dup = str_alloc(rb_obj_class(str));
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rb_str_replace(dup, str);
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return dup;
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return rb_str_new3(str);
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}
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@ -777,14 +787,23 @@ rb_str_modify(VALUE str)
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void
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rb_str_associate(VALUE str, VALUE add)
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{
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/* sanity check */
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if (OBJ_FROZEN(str)) rb_error_frozen("string");
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if (STR_ASSOC_P(str)) {
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/* sanity check */
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if (OBJ_FROZEN(str)) rb_error_frozen("string");
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/* already associated */
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rb_ary_concat(RSTRING(str)->as.heap.aux.shared, add);
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}
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else {
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if (STR_SHARED_P(str) || STR_EMBED_P(str)) {
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if (STR_SHARED_P(str)) {
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VALUE assoc = RSTRING(str)->as.heap.aux.shared;
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str_make_independent(str);
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if (STR_ASSOC_P(assoc)) {
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assoc = RSTRING(assoc)->as.heap.aux.shared;
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rb_ary_concat(assoc, add);
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add = assoc;
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}
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}
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else if (STR_EMBED_P(str)) {
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str_make_independent(str);
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}
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else if (RSTRING(str)->as.heap.aux.capa != RSTRING_LEN(str)) {
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@ -799,10 +818,9 @@ rb_str_associate(VALUE str, VALUE add)
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VALUE
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rb_str_associated(VALUE str)
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{
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if (STR_SHARED_P(str)) str = RSTRING(str)->as.heap.aux.shared;
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if (STR_ASSOC_P(str)) {
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VALUE ary = RSTRING(str)->as.heap.aux.shared;
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if (OBJ_FROZEN(str)) OBJ_FREEZE(ary);
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return ary;
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return RSTRING(str)->as.heap.aux.shared;
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}
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return Qfalse;
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}
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@ -965,9 +983,17 @@ rb_str_substr(VALUE str, long beg, long len)
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len = str_offset(p, e, len, enc, singlebyte);
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}
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sub:
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str2 = rb_str_new5(str, p, len);
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rb_enc_copy(str2, str);
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OBJ_INFECT(str2, str);
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if (len > RSTRING_EMBED_LEN_MAX && beg + len == RSTRING_LEN(str)) {
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str2 = rb_str_new4(str);
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str2 = str_new3(rb_obj_class(str2), str2);
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RSTRING(str2)->as.heap.ptr += RSTRING(str2)->as.heap.len - len;
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RSTRING(str2)->as.heap.len = len;
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}
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else {
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str2 = rb_str_new5(str, p, len);
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rb_enc_copy(str2, str);
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OBJ_INFECT(str2, str);
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}
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return str2;
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}
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@ -1179,7 +1205,7 @@ rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
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if (str_encindex != ptr_encindex &&
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str_cr != ENC_CODERANGE_7BIT &&
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ptr_cr != ENC_CODERANGE_7BIT) {
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incompatible:
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incompatible:
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rb_raise(rb_eArgError, "append incompatible encoding strings: %s and %s",
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rb_enc_name(rb_enc_from_index(str_encindex)),
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rb_enc_name(rb_enc_from_index(ptr_encindex)));
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@ -3005,6 +3031,9 @@ rb_str_replace(VALUE str, VALUE str2)
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StringValue(str2);
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len = RSTRING_LEN(str2);
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if (STR_ASSOC_P(str2)) {
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str2 = rb_str_new4(str2);
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}
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if (STR_SHARED_P(str2)) {
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if (str_independent(str) && !STR_EMBED_P(str)) {
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free(RSTRING_PTR(str));
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@ -3016,18 +3045,9 @@ rb_str_replace(VALUE str, VALUE str2)
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FL_UNSET(str, STR_ASSOC);
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RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
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}
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else if (STR_ASSOC_P(str2)) {
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rb_str_modify(str);
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STR_SET_NOEMBED(str);
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RSTRING(str)->as.heap.ptr = ALLOC_N(char,len+1);
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memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), len+1);
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FL_SET(str, STR_ASSOC);
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RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
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}
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else {
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rb_str_modify(str);
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rb_str_resize(str, len);
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memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), len+1);
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str_replace_shared(str, str2);
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}
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OBJ_INFECT(str, str2);
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