int ZLSearchUtil::find(const char *text, size_t length, const ZLSearchPattern &pattern, int pos) {
if (pattern.ignoreCase()) {
if (pos < 0) {
pos = 0;
}
const std::string &lower = pattern.lowerCasePattern();
const std::string &upper = pattern.upperCasePattern();
const char *last = text + length - pattern.lowerCasePattern().length();
const char *patternLast = lower.data() + lower.length() - 1;
for (const char *i = text + pos; i <= last; ++i) {
const char *j0 = lower.data();
const char *j1 = upper.data();
const char *k = i;
for (; j0 <= patternLast; ++j0, ++j1, ++k) {
if ((*j0 != *k) && (*j1 != *k)) {
break;
}
}
if (j0 > patternLast) {
return i - text;
}
}
return -1;
} else {
if (pos < 0) {
pos = 0;
}
const std::string &lower = pattern.lowerCasePattern();
const char *last = text + length - pattern.lowerCasePattern().length();
const char *patternLast = lower.data() + lower.length() - 1;
for (const char *i = text + pos; i <= last; ++i) {
const char *j0 = lower.data();
const char *k = i;
for (; j0 <= patternLast; ++j0, ++k) {
if (*j0 != *k) {
break;
}
}
if (j0 > patternLast) {
return i - text;
}
}
return -1;
}
}
int ZLSearchUtil::find(const char *text, size_t length, const ZLSearchPattern &pattern, int pos) {
if (pattern.ignoreCase()) {
if (pos < 0) {
pos = 0;
}
const std::string &lower = pattern.lowerCasePattern();
const std::string &upper = pattern.upperCasePattern();
const char *last = text + length - pattern.lowerCasePattern().length();
const char *patternLast = lower.data() + lower.length() - 1;
for (const char *i = text + pos; i <= last; ++i) {
const char *j0 = lower.data();
const char *j1 = upper.data();
const char *k = i;
for (; j0 <= patternLast; ++j0, ++j1, ++k) {
if ((*j0 != *k) && (*j1 != *k)) {
break;
}
else
{
if ((unsigned char)(*k) > 127)
{
if (j0 == patternLast)
break;
//check lower case
if (*j0 == *k) {
if ((unsigned char)(*(j0 + 1)) != (unsigned char)(*(k + 1)))
{
goto check_upper_case;
}
++j0, ++j1, ++k;
continue;
}
//check upper case
check_upper_case:
if (*j1 == *k) {
if ((unsigned char)(*(j1 + 1)) != (unsigned char)(*(k + 1)))
{
break;
}
++j0, ++j1, ++k;
continue;
}
}
}
}
if (j0 > patternLast) {
return i - text;
}
}
return -1;
} else {
if (pos < 0) {
pos = 0;
}
const std::string &lower = pattern.lowerCasePattern();
const char *last = text + length - pattern.lowerCasePattern().length();
const char *patternLast = lower.data() + lower.length() - 1;
for (const char *i = text + pos; i <= last; ++i) {
const char *j0 = lower.data();
const char *k = i;
for (; j0 <= patternLast; ++j0, ++k) {
if (*j0 != *k) {
break;
}
}
if (j0 > patternLast) {
return i - text;
}
}
return -1;
}
}