// mutations
void StringData::setChar(int offset, CStrRef substring) {
ASSERT(!isStatic());
if (offset >= 0) {
StringSlice s = slice();
if (s.len == 0) {
// PHP will treat data as an array and we don't want to follow that.
throw OffsetOutOfRangeException();
}
if (uint32_t(offset) < s.len) {
char* buf = (char*)s.ptr;
buf[offset] = substring.empty() ? 0 : substring.data()[0];
} else if (offset <= RuntimeOption::StringOffsetLimit) {
// We are mutating, so we don't need to repropagate our own taint
int newlen = offset + 1;
char *buf = (char *)Util::safe_malloc(newlen + 1);
memcpy(buf, s.ptr, s.len);
memset(buf + s.len, ' ', newlen - s.len);
buf[newlen] = 0;
buf[offset] = substring.empty() ? 0 : substring.data()[0];
attach(buf, newlen);
} else {
throw OffsetOutOfRangeException();
}
m_hash = 0; // since we modified the string.
}
}
void StringData::setChar(int offset, CStrRef substring) {
ASSERT(!isStatic());
if (offset >= 0) {
int len = size();
if (len == 0) {
// PHP will treat data as an array and we don't want to follow that.
throw OffsetOutOfRangeException();
}
if (offset < len) {
if (!substring.empty()) {
setChar(offset, substring.data()[0]);
} else {
removeChar(offset);
}
} else if (offset > RuntimeOption::StringOffsetLimit) {
throw OffsetOutOfRangeException();
} else {
int newlen = offset + 1;
char *buf = (char *)Util::safe_malloc(newlen + 1);
memset(buf, ' ', newlen);
buf[newlen] = 0;
memcpy(buf, data(), len);
if (!substring.empty()) buf[offset] = substring.data()[0];
assign(buf, newlen, AttachString);
}
}
}
// mutations
void StringData::setChar(int offset, CStrRef substring) {
assert(!isStatic());
if (offset >= 0) {
StringSlice s = slice();
if (s.len == 0) {
// PHP will treat data as an array and we don't want to follow that.
throw OffsetOutOfRangeException();
}
char c = substring.empty() ? 0 : substring.data()[0];
if (uint32_t(offset) < s.len) {
((char*)s.ptr)[offset] = c;
} else if (offset <= RuntimeOption::StringOffsetLimit) {
uint32_t newlen = offset + 1;
MutableSlice buf = isImmutable() ? escalate(newlen) : reserve(newlen);
memset(buf.ptr + s.len, ' ', newlen - s.len);
buf.ptr[offset] = c;
setSize(newlen);
} else {
throw OffsetOutOfRangeException();
}
m_hash = 0; // since we modified the string.
}
}
