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encoding.c: rb_enc_find_index2

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* string.c (str_undump): use rb_enc_find_index2 to find encoding
  by unterminated string.  check the format before encoding name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61396 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-12-22 01:03:17 +00:00
parent b4dc51ce10
commit e2479cc43f
3 changed files with 17 additions and 13 deletions
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2
encindex.h
View file

@ -57,6 +57,8 @@ enum ruby_preserved_encindex {
#define rb_utf8_encindex() RUBY_ENCINDEX_UTF_8
#define rb_usascii_encindex() RUBY_ENCINDEX_US_ASCII
int rb_enc_find_index2(const char *name, long len);
#if defined(__cplusplus)
#if 0
{ /* satisfy cc-mode */

11
encoding.c
View file

@ -724,6 +724,17 @@ rb_enc_find_index(const char *name)
return i;
}
int
rb_enc_find_index2(const char *name, long len)
{
char buf[ENCODING_NAMELEN_MAX+1];
if (len > ENCODING_NAMELEN_MAX) return -1;
memcpy(buf, name, len);
buf[len] = '\0';
return rb_enc_find_index(buf);
}
rb_encoding *
rb_enc_find(const char *name)
{

17
string.c
View file

@ -6263,7 +6263,6 @@ str_undump(VALUE str)
}
else {
const char *encname;
char *buf;
int encidx;
ptrdiff_t size;
@ -6280,22 +6279,14 @@ str_undump(VALUE str)
s = memchr(s, '"', s_end-s);
size = s - encname;
if (!s) goto invalid_format;
if (size > 100) {
rb_raise(rb_eRuntimeError, "dumped string has unknown encoding name");
}
buf = ALLOC_N(char, size+1);
memcpy(buf, encname, size);
buf[size] = '\0';
encidx = rb_enc_find_index(buf);
xfree(buf);
if (s_end - s != 2) goto invalid_format;
if (s[0] != '"' || s[1] != ')') goto invalid_format;
encidx = rb_enc_find_index2(encname, (long)size);
if (encidx < 0) {
rb_raise(rb_eRuntimeError, "dumped string has unknown encoding name");
}
rb_enc_associate_index(undumped, encidx);
if (s_end - s != 2 ||
s[0] != '"' ||
s[1] != ')') goto invalid_format;
}
break;
}