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* encoding.c (rb_enc_compatible): fix segv on symbols.

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[ruby-core:42204] [Bug #5921]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34350 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2012-01-21 12:57:37 +00:00
parent c8f98a75d8
commit b1428ace6b
3 changed files with 25 additions and 8 deletions
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22
encoding.c
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@ -759,6 +759,7 @@ rb_enc_compatible(VALUE str1, VALUE str2)
{
int idx1, idx2;
rb_encoding *enc1, *enc2;
int isstr1, isstr2;
idx1 = rb_enc_get_index(str1);
idx2 = rb_enc_get_index(str2);
@ -772,33 +773,38 @@ rb_enc_compatible(VALUE str1, VALUE str2)
enc1 = rb_enc_from_index(idx1);
enc2 = rb_enc_from_index(idx2);
if (BUILTIN_TYPE(str2) == T_STRING && RSTRING_LEN(str2) == 0)
isstr2 = RB_TYPE_P(str2, T_STRING);
if (isstr2 && RSTRING_LEN(str2) == 0)
return enc1;
if (BUILTIN_TYPE(str1) == T_STRING && RSTRING_LEN(str1) == 0)
isstr1 = RB_TYPE_P(str1, T_STRING);
if (isstr1 && RSTRING_LEN(str1) == 0)
return (rb_enc_asciicompat(enc1) && rb_enc_str_asciionly_p(str2)) ? enc1 : enc2;
if (!rb_enc_asciicompat(enc1) || !rb_enc_asciicompat(enc2)) {
return 0;
}
/* objects whose encoding is the same of contents */
if (BUILTIN_TYPE(str2) != T_STRING && idx2 == ENCINDEX_US_ASCII)
if (!isstr2 && idx2 == ENCINDEX_US_ASCII)
return enc1;
if (BUILTIN_TYPE(str1) != T_STRING && idx1 == ENCINDEX_US_ASCII)
if (!isstr1 && idx1 == ENCINDEX_US_ASCII)
return enc2;
if (BUILTIN_TYPE(str1) != T_STRING) {
if (!isstr1) {
VALUE tmp = str1;
int idx0 = idx1;
str1 = str2;
str2 = tmp;
idx1 = idx2;
idx2 = idx0;
idx0 = isstr1;
isstr1 = isstr2;
isstr2 = idx0;
}
if (BUILTIN_TYPE(str1) == T_STRING) {
if (isstr1) {
int cr1, cr2;
cr1 = rb_enc_str_coderange(str1);
if (BUILTIN_TYPE(str2) == T_STRING) {
if (isstr2) {
cr2 = rb_enc_str_coderange(str2);
if (cr1 != cr2) {
/* may need to handle ENC_CODERANGE_BROKEN */
@ -1083,7 +1089,7 @@ enc_find(VALUE klass, VALUE enc)
*
* If the objects are non-strings their encodings are compatible when they
* have an encoding and:
* * Either encoding is US ASCII compatible
* * Either encoding is US-ASCII compatible
* * One of the encodings is a 7-bit encoding
*
*/