std::string replace_with_pattern(const std::string& item, const RE2& pattern, const std::string& target) {
RE2::Arg argv[10];
const RE2::Arg* args[10] = {&argv[0], &argv[1], &argv[2], &argv[3], &argv[4], &argv[5], &argv[6], &argv[7], &argv[8], &argv[9]};
std::string arg[10];
for (size_t i = 0; i < 10; i++) {
argv[i] = &arg[i];
}
if (!RE2::FullMatchN(item, pattern, args, pattern.NumberOfCapturingGroups()))
return item;
return replace_matches(target, arg, '@', pattern.NumberOfCapturingGroups());
}
int msc_regexec_ex(RE2 &re, const char *s, unsigned int slen,
int startoffset, int *ovector, int ovecsize)
{
size_t startpos = startoffset;
const size_t endpos = slen;
// Total # of submatches in the regex pattern
int num_submatch = 1 + re.NumberOfCapturingGroups();
// Index of the last non empty submatch
int last_nonempty_submatch = num_submatch - 1;
re2::StringPiece submatches[num_submatch];
// If the string does not match the pattern
if (!re.Match(s, startpos, endpos, RE2::UNANCHORED, submatches, num_submatch)) {
return -1;
}
// Find the last non empty submatch
while (!submatches[last_nonempty_submatch].data()) {
last_nonempty_submatch--;
}
int count = min(last_nonempty_submatch + 1, ovecsize / 3);
// Extract submatch information as much as possible
for (int i = 0; i < count; i++) {
// An empty submatch
if (!submatches[i].data()) {
ovector[2 * i] = -1;
ovector[2 * i + 1] = -1;
} else {
ovector[2 * i] = submatches[i].data() - s;
ovector[2 * i + 1] = ovector[2 * i] + submatches[i].length();
}
}
// The output vector has enough space to store the information of
// all non empty submatches + empty submatches among non empty submatches
if (last_nonempty_submatch + 1 <= ovecsize / 3) {
return last_nonempty_submatch + 1;
}
// Truncate empty submatches at the tail of 'ovector'
if (!submatches[ovecsize / 3 - 1].data()) {
for (int i = ovecsize / 3 - 2; i >= 0; i--) {
if (submatches[i].data()) {
return i + 1;
}
}
}
return 0;
}
JNIEXPORT jint JNICALL Java_com_logentries_re2_RE2_numberOfCapturingGroupsImpl
(JNIEnv *env, jclass cls, jlong re2_pointer) {
RE2 *regex = reinterpret_cast<RE2*>(re2_pointer);
return static_cast<jint>(regex->NumberOfCapturingGroups());
}
