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merges r24364 from trunk into ruby_1_9_1.

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--
* array.c (rb_ary_{permutation,combination}): disallow reentrance
  with continuation since work-buffers cannot restore.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@24459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
yugui 2009-08-08 15:32:09 +00:00
parent 208ec9936a
commit 7ad4bd137d
3 changed files with 13 additions and 4 deletions
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5
ChangeLog
View file

@ -1,4 +1,7 @@
Mon Aug 3 13:05:22 2009 Nobuyoshi Nakada <nobu@ruby-lang.org>
Mon Aug 3 15:48:40 2009 Nobuyoshi Nakada <nobu@ruby-lang.org>
* array.c (rb_ary_{permutation,combination}): disallow reentrance
with continuation since work-buffers cannot restore.
* array.c (rb_ary_{permutation,combination,product}): must not use
ary_discard on strings.

10
array.c
View file

@ -3401,6 +3401,7 @@ rb_ary_cycle(int argc, VALUE *argv, VALUE ary)
}
#define tmpbuf(n, size) rb_str_tmp_new((n)*(size))
#define tmpary(n) rb_ary_tmp_new(n)
/*
* Recursively compute permutations of r elements of the set [0..n-1].
@ -3438,6 +3439,9 @@ permute0(long n, long r, long *p, long index, int *used, VALUE values)
for (j = 0; j < r; j++) result_array[j] = values_array[p[j]];
ARY_SET_LEN(result, r);
rb_yield(result);
if (RBASIC(values)->klass) {
rb_raise(rb_eRuntimeError, "permute reentered");
}
}
}
}
@ -3576,11 +3580,10 @@ rb_ary_combination(VALUE ary, VALUE num)
volatile VALUE t0 = tmpbuf(n+1, sizeof(long));
long *stack = (long*)RSTRING_PTR(t0);
long nlen = combi_len(len, n);
volatile VALUE cc = rb_ary_new2(n);
volatile VALUE cc = tmpary(n);
VALUE *chosen = RARRAY_PTR(cc);
long lev = 0;
RBASIC(cc)->klass = 0;
MEMZERO(stack, long, n);
stack[0] = -1;
for (i = 0; i < nlen; i++) {
@ -3589,6 +3592,9 @@ rb_ary_combination(VALUE ary, VALUE num)
chosen[lev] = RARRAY_PTR(ary)[stack[lev+1] = stack[lev]+1];
}
rb_yield(rb_ary_new4(n, chosen));
if (RBASIC(t0)->klass) {
rb_raise(rb_eRuntimeError, "combination reentered");
}
do {
stack[lev--]++;
} while (lev && (stack[lev+1]+n == len+lev+1));

2
version.h
View file

@ -1,5 +1,5 @@
#define RUBY_VERSION "1.9.1"
#define RUBY_PATCHLEVEL 263
#define RUBY_PATCHLEVEL 264
#define RUBY_VERSION_MAJOR 1
#define RUBY_VERSION_MINOR 9
#define RUBY_VERSION_TEENY 1