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* sprintf.c (rb_f_sprintf): more checks for format argument.

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[ruby-core:11569], [ruby-core:11570], [ruby-core:11571],
  [ruby-core:11573]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2007-07-15 20:45:55 +00:00
parent 66e1be60c3
commit 192c936e23
3 changed files with 74 additions and 26 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
Mon Jul 16 05:45:53 2007 Nobuyoshi Nakada <nobu@ruby-lang.org>
* sprintf.c (rb_f_sprintf): more checks for format argument.
[ruby-core:11569], [ruby-core:11570], [ruby-core:11571],
[ruby-core:11573]
Mon Jul 16 00:26:10 2007 Nobuyoshi Nakada <nobu@ruby-lang.org>
* bignum.c (rb_big_pow): removed invariant variable. [ruby-dev:31236]

61
sprintf.c
View file

@ -79,6 +79,7 @@ sign_bits(int base, const char *p)
#define FSPACE 16
#define FWIDTH 32
#define FPREC 64
#define FPREC0 128
#define CHECK(l) do {\
while (blen + (l) >= bsiz) {\
@ -113,9 +114,7 @@ sign_bits(int base, const char *p)
#define GETNTHARG(nth) \
((nth >= argc) ? (rb_raise(rb_eArgError, "too few arguments"), 0) : argv[nth])
#define GETASTER(val) do { \
t = p++; \
n = 0; \
#define GETNUM(n, val) \
for (; p < end && ISDIGIT(*p); p++) { \
int next_n = 10 * n + (*p - '0'); \
if (next_n / 10 != n) {\
@ -125,7 +124,12 @@ sign_bits(int base, const char *p)
} \
if (p >= end) { \
rb_raise(rb_eArgError, "malformed format string - %%*[0-9]"); \
} \
}
#define GETASTER(val) do { \
t = p++; \
n = 0; \
GETNUM(n, val); \
if (*p == '$') { \
tmp = GETPOSARG(n); \
} \
@ -263,6 +267,21 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
VALUE tmp;
VALUE str;
#define CHECK_FOR_WIDTH(f) \
if ((f) & FWIDTH) { \
rb_raise(rb_eArgError, "width given twice"); \
} \
if ((f) & FPREC0) { \
rb_raise(rb_eArgError, "width after precision"); \
}
#define CHECK_FOR_FLAGS(f) \
if ((f) & FWIDTH) { \
rb_raise(rb_eArgError, "flag after width"); \
} \
if ((f) & FPREC0) { \
rb_raise(rb_eArgError, "flag after precision"); \
}
++argc;
--argv;
if (OBJ_TAINTED(fmt)) tainted = 1;
@ -299,43 +318,40 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
break;
case ' ':
CHECK_FOR_FLAGS(flags);
flags |= FSPACE;
p++;
goto retry;
case '#':
CHECK_FOR_FLAGS(flags);
flags |= FSHARP;
p++;
goto retry;
case '+':
CHECK_FOR_FLAGS(flags);
flags |= FPLUS;
p++;
goto retry;
case '-':
CHECK_FOR_FLAGS(flags);
flags |= FMINUS;
p++;
goto retry;
case '0':
CHECK_FOR_FLAGS(flags);
flags |= FZERO;
p++;
goto retry;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
CHECK_FOR_WIDTH(flags);
n = 0;
for (; p < end && ISDIGIT(*p); p++) {
int next_n = 10 * n + (*p - '0');
if (next_n / 10 != n) {
rb_raise(rb_eArgError, "width too big");
}
n = next_n;
}
if (p >= end) {
rb_raise(rb_eArgError, "malformed format string - %%[0-9]");
}
GETNUM(n, width);
if (*p == '$') {
if (nextvalue != Qundef) {
rb_raise(rb_eArgError, "value given twice - %d$", n);
@ -349,9 +365,7 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
goto retry;
case '*':
if (flags & FWIDTH) {
rb_raise(rb_eArgError, "width given twice");
}
CHECK_FOR_WIDTH(flags);
flags |= FWIDTH;
GETASTER(width);
if (width < 0) {
@ -362,10 +376,10 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
goto retry;
case '.':
if (flags & FPREC) {
if (flags & FPREC0) {
rb_raise(rb_eArgError, "precision given twice");
}
flags |= FPREC;
flags |= FPREC|FPREC0;
prec = 0;
p++;
@ -378,17 +392,12 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
goto retry;
}
for (; p < end && ISDIGIT(*p); p++) {
prec = 10 * prec + (*p - '0');
}
if (p >= end) {
rb_raise(rb_eArgError, "malformed format string - %%.[0-9]");
}
GETNUM(prec, precision);
goto retry;
case '\n':
p--;
case '\0':
p--;
case '%':
if (flags != FNONE) {
rb_raise(rb_eArgError, "illegal format character - %%");

33
test/ruby/test_sprintf.rb
View file

@ -138,4 +138,37 @@ class TestSprintf < Test::Unit::TestCase
assert_equal("-Inf ", sprintf("%- 08f", -inf))
assert_equal("-0000Inf", sprintf("%+ 08f", -inf))
end
def test_invalid
# [ruby-core:11569]
# Star precision before star width:
assert_raise(ArgumentError) {sprintf("%.**d", 5, 10, 1)}
# Precision before flags and width:
assert_raise(ArgumentError) {sprintf("%.5+05d", 5)}
assert_raise(ArgumentError) {sprintf("%.5 5d", 5)}
# Overriding a star width with a numeric one:
assert_raise(ArgumentError) {sprintf("%*1s", 5, 1)}
# Width before flags:
assert_raise(ArgumentError) {sprintf("%5+0d", 1)}
assert_raise(ArgumentError) {sprintf("%5 0d", 1)}
# Specifying width multiple times:
assert_raise(ArgumentError) {sprintf("%50+30+20+10+5d", 5)}
assert_raise(ArgumentError) {sprintf("%50 30 20 10 5d", 5)}
# [ruby-core:11570]
# Specifying the precision multiple times with negative star arguments:
assert_raise(ArgumentError) {sprintf("%.*.*.*.*f", -1, -1, -1, 5, 1)}
# [ruby-core:11571]
# Null bytes after percent signs are removed:
assert_equal("%\0x hello", sprintf("%\0x hello"))
# [ruby-core:11573]
assert_raise(ArgumentError) {sprintf("%.25555555555555555555555555555555555555s", "hello")}
end
end