static PRUint32
net_FindMediaDelimiter(const nsCString& flatStr,
PRUint32 searchStart,
char delimiter)
{
do {
// searchStart points to the spot from which we should start looking
// for the delimiter.
const char delimStr[] = { delimiter, '"', '\0' };
PRUint32 curDelimPos = flatStr.FindCharInSet(delimStr, searchStart);
if (curDelimPos == PRUint32(kNotFound))
return flatStr.Length();
char ch = flatStr.CharAt(curDelimPos);
if (ch == delimiter) {
// Found delimiter
return curDelimPos;
}
// We hit the start of a quoted string. Look for its end.
searchStart = net_FindStringEnd(flatStr, curDelimPos, ch);
if (searchStart == flatStr.Length())
return searchStart;
++searchStart;
// searchStart now points to the first char after the end of the
// string, so just go back to the top of the loop and look for
// |delimiter| again.
} while (true);
NS_NOTREACHED("How did we get here?");
return flatStr.Length();
}
nsresult
nsGopherContentStream::ParseTypeAndSelector(char &type, nsCString &selector)
{
nsCAutoString buffer;
nsresult rv = mChannel->URI()->GetPath(buffer); // unescaped down below
if (NS_FAILED(rv))
return rv;
// No path given
if (buffer[0] == '\0' || (buffer[0] == '/' && buffer[1] == '\0')) {
type = '1';
selector.Truncate();
} else {
NS_ENSURE_STATE(buffer[1] != '\0');
type = buffer[1]; // Ignore leading '/'
// Do it this way in case selector contains embedded nulls after
// unescaping.
char *sel = buffer.BeginWriting() + 2;
PRInt32 count = nsUnescapeCount(sel);
selector.Assign(sel, count);
// NOTE: FindCharInSet cannot be used to search for a null byte.
if (selector.FindCharInSet("\t\n\r") != kNotFound ||
selector.FindChar('\0') != kNotFound) {
// gopher selectors cannot containt tab, cr, lf, or \0
return NS_ERROR_MALFORMED_URI;
}
}
return NS_OK;
}
// Return the index of the closing quote of the string, if any
static PRUint32
net_FindStringEnd(const nsCString& flatStr,
PRUint32 stringStart,
char stringDelim)
{
NS_ASSERTION(stringStart < flatStr.Length() &&
flatStr.CharAt(stringStart) == stringDelim &&
(stringDelim == '"' || stringDelim == '\''),
"Invalid stringStart");
const char set[] = { stringDelim, '\\', '\0' };
do {
// stringStart points to either the start quote or the last
// escaped char (the char following a '\\')
// Write to searchStart here, so that when we get back to the
// top of the loop right outside this one we search from the
// right place.
PRUint32 stringEnd = flatStr.FindCharInSet(set, stringStart + 1);
if (stringEnd == PRUint32(kNotFound))
return flatStr.Length();
if (flatStr.CharAt(stringEnd) == '\\') {
// Hit a backslash-escaped char. Need to skip over it.
stringStart = stringEnd + 1;
if (stringStart == flatStr.Length())
return stringStart;
// Go back to looking for the next escape or the string end
continue;
}
return stringEnd;
} while (true);
NS_NOTREACHED("How did we get here?");
return flatStr.Length();
}
