Class: RE2::Set
Class Method Summary collapse
-
.match_raises_errors? ⇒ Boolean
Returns whether the underlying RE2 version outputs error information from
RE2::Set::Match
. -
.size? ⇒ Boolean
Returns whether the underlying RE2 version has a Set::Size method.
Instance Method Summary collapse
-
#add(pattern) ⇒ Integer
Adds a pattern to the set.
-
#compile ⇒ Boolean
Compiles a Set so it can be used to match against.
-
#initialize(*args) ⇒ RE2::Set
constructor
Returns a new Set object, a collection of patterns that can be searched for simultaneously.
-
#length ⇒ Integer
Returns the size of the Set.
-
#match(*args) ⇒ Array<Integer>
Matches the given text against patterns in the set, returning an array of integer indices of the matching patterns if matched or an empty array if there are no matches.
-
#size ⇒ Integer
Returns the size of the Set.
Constructor Details
#initialize ⇒ RE2::Set #initialize(anchor) ⇒ RE2::Set #initialize(anchor, options) ⇒ RE2::Set
Returns a new RE2::Set object, a collection of patterns that can be searched for simultaneously.
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# File 'ext/re2/re2.cc', line 1860
static VALUE re2_set_initialize(int argc, VALUE *argv, VALUE self) {
VALUE anchor, options;
re2_set *s;
rb_scan_args(argc, argv, "02", &anchor, &options);
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
RE2::Anchor re2_anchor = RE2::UNANCHORED;
if (!NIL_P(anchor)) {
Check_Type(anchor, T_SYMBOL);
ID id_anchor_arg = SYM2ID(anchor);
if (id_anchor_arg == id_unanchored) {
re2_anchor = RE2::UNANCHORED;
} else if (id_anchor_arg == id_anchor_start) {
re2_anchor = RE2::ANCHOR_START;
} else if (id_anchor_arg == id_anchor_both) {
re2_anchor = RE2::ANCHOR_BOTH;
} else {
rb_raise(rb_eArgError, "anchor should be one of: :unanchored, :anchor_start, :anchor_both");
}
}
RE2::Options re2_options;
if (RTEST(options)) {
parse_re2_options(&re2_options, options);
}
s->set = new(std::nothrow) RE2::Set(re2_options, re2_anchor);
if (s->set == 0) {
rb_raise(rb_eNoMemError, "not enough memory to allocate RE2::Set object");
}
return self;
}
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Class Method Details
.match_raises_errors? ⇒ Boolean
Returns whether the underlying RE2 version outputs error information from
RE2::Set::Match
. If not, #match will raise an error if attempting to set
its :exception
option to true
.
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# File 'ext/re2/re2.cc', line 1981 static VALUE re2_set_match_raises_errors_p(VALUE) { #ifdef HAVE_ERROR_INFO_ARGUMENT return Qtrue; #else return Qfalse; #endif } |
.size? ⇒ Boolean
Returns whether the underlying RE2 version has a Set::Size method.
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# File 'ext/re2/re2.cc', line 1994 static VALUE re2_set_size_p(VALUE) { #ifdef HAVE_SET_SIZE return Qtrue; #else return Qfalse; #endif } |
Instance Method Details
#add(pattern) ⇒ Integer
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# File 'ext/re2/re2.cc', line 1910
static VALUE re2_set_add(VALUE self, VALUE pattern) {
StringValue(pattern);
re2_set *s;
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
/* To prevent the memory of the err string leaking when we call rb_raise,
* take a copy of it and let it go out of scope.
*/
char msg[100];
int index;
{
std::string err;
index = s->set->Add(
re2::StringPiece(RSTRING_PTR(pattern), RSTRING_LEN(pattern)), &err);
strlcpy(msg, err.c_str(), sizeof(msg));
}
if (index < 0) {
rb_raise(rb_eArgError, "str rejected by RE2::Set->Add(): %s", msg);
}
return INT2FIX(index);
}
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#compile ⇒ Boolean
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# File 'ext/re2/re2.cc', line 1946
static VALUE re2_set_compile(VALUE self) {
re2_set *s;
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
return BOOL2RUBY(s->set->Compile());
}
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#length ⇒ Integer
Returns the size of the RE2::Set.
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# File 'ext/re2/re2.cc', line 1962
static VALUE re2_set_size(VALUE self) {
#ifdef HAVE_SET_SIZE
re2_set *s;
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
return INT2FIX(s->set->Size());
#else
rb_raise(re2_eSetUnsupportedError, "current version of RE2::Set does not have Size method");
#endif
}
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#match(str) ⇒ Array<Integer> #match(str, options) ⇒ Array<Integer>
Matches the given text against patterns in the set, returning an array of integer indices of the matching patterns if matched or an empty array if there are no matches.
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# File 'ext/re2/re2.cc', line 2042
static VALUE re2_set_match(int argc, VALUE *argv, const VALUE self) {
VALUE str, options;
bool raise_exception = true;
rb_scan_args(argc, argv, "11", &str, &options);
StringValue(str);
re2_set *s;
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
if (RTEST(options)) {
Check_Type(options, T_HASH);
VALUE exception_option = rb_hash_aref(options, ID2SYM(id_exception));
if (!NIL_P(exception_option)) {
raise_exception = RTEST(exception_option);
}
}
std::vector<int> v;
if (raise_exception) {
#ifdef HAVE_ERROR_INFO_ARGUMENT
RE2::Set::ErrorInfo e;
bool match_failed = !s->set->Match(
re2::StringPiece(RSTRING_PTR(str), RSTRING_LEN(str)), &v, &e);
VALUE result = rb_ary_new2(v.size());
if (match_failed) {
switch (e.kind) {
case RE2::Set::kNoError:
break;
case RE2::Set::kNotCompiled:
rb_raise(re2_eSetMatchError, "#match must not be called before #compile");
case RE2::Set::kOutOfMemory:
rb_raise(re2_eSetMatchError, "The DFA ran out of memory");
case RE2::Set::kInconsistent:
rb_raise(re2_eSetMatchError, "RE2::Prog internal error");
default: // Just in case a future version of libre2 adds new ErrorKinds
rb_raise(re2_eSetMatchError, "Unknown RE2::Set::ErrorKind: %d", e.kind);
}
} else {
for (std::vector<int>::size_type i = 0; i < v.size(); ++i) {
rb_ary_push(result, INT2FIX(v[i]));
}
}
return result;
#else
rb_raise(re2_eSetUnsupportedError, "current version of RE2::Set::Match() does not output error information, :exception option can only be set to false");
#endif
} else {
bool matched = s->set->Match(
re2::StringPiece(RSTRING_PTR(str), RSTRING_LEN(str)), &v);
VALUE result = rb_ary_new2(v.size());
if (matched) {
for (std::vector<int>::size_type i = 0; i < v.size(); ++i) {
rb_ary_push(result, INT2FIX(v[i]));
}
}
return result;
}
}
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#size ⇒ Integer
Returns the size of the RE2::Set.
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# File 'ext/re2/re2.cc', line 1962
static VALUE re2_set_size(VALUE self) {
#ifdef HAVE_SET_SIZE
re2_set *s;
TypedData_Get_Struct(self, re2_set, &re2_set_data_type, s);
return INT2FIX(s->set->Size());
#else
rb_raise(re2_eSetUnsupportedError, "current version of RE2::Set does not have Size method");
#endif
}
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