unsigned char String::reserve(unsigned int size){
if (buffer && capacity >= size) return 1;
if (changeBuffer(size)) {
if (len == 0) buffer[0] = 0;
return 1;
}
return 0;
}
void String::replace(const String &find, const String &replace)
{
if ( (len == 0) || (find.len == 0) ) {
return;
}
int diff = replace.len - find.len;
char *readFrom = buffer;
char *foundAt;
if ( diff == 0 ) {
while ( ( foundAt = strstr(readFrom, find.buffer) ) != NULL ) {
memcpy(foundAt, replace.buffer, replace.len);
readFrom = foundAt + replace.len;
}
} else if ( diff < 0 ) {
char *writeTo = buffer;
while ( ( foundAt = strstr(readFrom, find.buffer) ) != NULL ) {
unsigned int n = foundAt - readFrom;
memcpy(writeTo, readFrom, n);
writeTo += n;
memcpy(writeTo, replace.buffer, replace.len);
writeTo += replace.len;
readFrom = foundAt + find.len;
len += diff;
}
strcpy(writeTo, readFrom);
} else {
unsigned int size = len; // compute size needed for result
while ( ( foundAt = strstr(readFrom, find.buffer) ) != NULL ) {
readFrom = foundAt + find.len;
size += diff;
}
if ( size == len ) {
return;
}
if ( (size > capacity) && !changeBuffer(size) ) {
return; // XXX: tell user!
}
int index = len - 1;
while ( index >= 0 && ( index = lastIndexOf(find, index) ) >= 0 ) {
readFrom = buffer + index + find.len;
memmove( readFrom + diff, readFrom, len - (readFrom - buffer) );
len += diff;
buffer[len] = 0;
memcpy(buffer + index, replace.buffer, replace.len);
index--;
}
}
}
void ExternalInputSource::reallocateBuffer(size_t newSize)
{
Char *newBuf = new Char[newSize];
memcpy(newBuf, buf_, bufSize_*sizeof(Char));
bufSize_ = newSize;
changeBuffer(newBuf, buf_);
bufLim_ = newBuf + (bufLim_ - buf_);
if (nLeftOver_ > 0) {
char *s = (char *)(newBuf + bufSize_) - nLeftOver_;
memmove(s,
newBuf + (leftOver_ - (char *)buf_),
nLeftOver_);
leftOver_ = s;
}
delete [] buf_;
buf_ = newBuf;
}
