/** True if the next token begins the close tag */
static bool atClose(TextInput& t, const std::string name) {
if ((t.peek().type() == Token::SYMBOL) && (t.peek().string() == "<")) {
// Need to keep looking ahead
Token p0 = t.read();
if ((t.peek().type() == Token::SYMBOL) && (t.peek().string() == "/")) {
// Check the name on the close tag. It *must* match if
// this is a well-formed document, but there might be a
// tag error.
Token p1 = t.read();
Token p2 = t.peek();
std::string s = p2.string();
debugAssertM(beginsWith(name, s), "Mismatched close tag");
// Put the tokens back
t.push(p1);
t.push(p0);
return true;
} else {
// Put the read token back
t.push(p0);
return false;
}
} else {
return false;
}
}
void Any::deserialize(TextInput& ti) {
beforeRead();
Token token = ti.read();
deserialize(ti, token);
// Restore the last token
ti.push(token);
}
GLenum Shader::ShaderProgram::getDeclarationType(TextInput& ti, bool& uniform) {
uniform = false;
if (ti.peek().type() == Token::SYMBOL) {
bool readyForType = false;
String s = ti.peek().string();
//Parse all qualifiers before the type:
while (! readyForType) {
if (isQualifier(s)) {
uniform = (uniform || (s == "uniform"));
ti.readSymbol(s);
s = ti.peek().string();
} else if (s == "layout") {
//This should properly parse through all possible layout inputs
//http://www.opengl.org/registry/doc/GLSLangSpec.4.30.6.pdf (pg52)
ti.readSymbol(s);
ti.readSymbol("(");
Token t = ti.read();
while ((t.type() != Token::SYMBOL) || (t.string() != ")")) {
t = ti.read();
}
s = ti.peek().string();
} else {
// The next token is not a qualifier of any sort, so it is probably the type, if this is a declaration
readyForType = true;
}
}
// Read the type
String variableSymbol = ti.readSymbol();
// check for unsigned int, short, long long, etc
if (variableSymbol == "unsigned") {
while (toGLType(variableSymbol + " " + ti.peek().string()) != GL_NONE) {
variableSymbol += " " + ti.readSymbol();
}
}
// If the variableSymbol is not a valid type, then this is not a variable declaration, and GL_NONE will be returned
// Checking for not being a declaration cannot be done earlier, as a declaration could have no qualifiers
return toGLType(variableSymbol);
} else {
return GL_NONE;
}
}
void Any::deserializeComment(TextInput& ti, Token& token, std::string& comment) {
// Parse comments
while (token.type() == Token::COMMENT) {
comment += trimWhitespace(token.string()) + "\n";
// Allow comments to contain newlines.
do {
token = ti.read();
comment += "\n";
} while (token.type() == Token::NEWLINE);
}
comment = trimWhitespace(comment);
}
void Any::readUntilCommaOrClose(TextInput& ti, Token& token) {
while (!(((token.type() == Token::SYMBOL) &&
(isClose(token.string()[0]))) ||
isSeparator(token.string()[0]))) {
switch (token.type()) {
case Token::NEWLINE:
case Token::COMMENT:
// Consume
token = ti.read();
break;
default:
throw ParseError(ti.filename(), token.line(), token.character(),
"Expected a comma or close paren");
}
}
}
void Any::deserializeBody(TextInput& ti, Token& token) {
char closeSymbol = '}';
m_type = TABLE;
const char c = token.string()[0];
if (c != '{') {
m_type = ARRAY;
// Chose the appropriate close symbol
closeSymbol = (c == '(') ? ')' : ']';
}
// Allocate the underlying data structure
ensureData();
m_data->source.set(ti, token);
// Consume the open token
token = ti.read();
while (!((token.type() == Token::SYMBOL) && (token.string()[0] == closeSymbol))) {
// Read any leading comment. This must be done here (and not in the recursive deserialize
// call) in case the body contains only a comment.
std::string comment;
deserializeComment(ti, token, comment);
if ((token.type() == Token::SYMBOL) && (token.string()[0] == closeSymbol)) {
// We're done; this catches the case where the array is empty
break;
}
// Pointer the value being read
Any a;
std::string key;
if (m_type == TABLE) {
// Read the key
if (token.type() != Token::SYMBOL && token.type() != Token::STRING) {
throw ParseError(ti.filename(), token.line(), token.character(), "Expected a name");
}
key = token.string();
// Consume everything up to the = sign
token = ti.readSignificant();
if ((token.type() != Token::SYMBOL) || (token.string() != "=")) {
throw ParseError(ti.filename(), token.line(), token.character(), "Expected =");
}
else {
// Consume (don't consume comments--we want the value pointed to by a to get those).
token = ti.read();
}
}
a.deserialize(ti, token);
if (!comment.empty()) {
// Prepend the comment we read earlier
a.ensureData();
a.m_data->comment = trimWhitespace(comment + "\n" + a.m_data->comment);
}
if (m_type == TABLE) {
set(key, a);
}
else {
append(a);
}
// Read until the comma or close paren, discarding trailing comments and newlines
readUntilCommaOrClose(ti, token);
// Consume the comma
if (isSeparator(token.string()[0])) {
token = ti.read();
}
}
// Consume the close paren (to match other deserialize methods)
token = ti.read();
}
void Any::deserialize(TextInput& ti, Token& token) {
// Deallocate old data
dropReference();
m_type = NONE;
m_simpleValue.b = false;
// Skip leading newlines
while (token.type() == Token::NEWLINE) {
token = ti.read();
}
std::string comment;
if (token.type() == Token::COMMENT) {
deserializeComment(ti, token, comment);
}
if (token.type() == Token::END) {
// There should never be a comment without an Any following it; even
// if the file ends with some commented out stuff,
// that should not happen after a comma, so we'd never read that
// far in a proper file.
throw ParseError(ti.filename(), token.line(), token.character(),
"File ended without a properly formed Any");
}
switch (token.type()) {
case Token::STRING:
m_type = STRING;
ensureData();
*(m_data->value.s) = token.string();
m_data->source.set(ti, token);
break;
case Token::NUMBER:
m_type = NUMBER;
m_simpleValue.n = token.number();
ensureData();
m_data->source.set(ti, token);
break;
case Token::BOOLEAN:
m_type = BOOLEAN;
m_simpleValue.b = token.boolean();
ensureData();
m_data->source.set(ti, token);
break;
case Token::SYMBOL:
// Named Array, Named Table, Array, Table, or NONE
if (toUpper(token.string()) == "NONE") {
// Nothing left to do; we initialized to NONE originally
ensureData();
m_data->source.set(ti, token);
}
else {
// Array or Table
// Parse the name
// s must have at least one element or this would not have
// been parsed as a symbol
std::string name;
deserializeName(ti, token, name);
if (token.type() != Token::SYMBOL) {
throw ParseError(ti.filename(), token.line(), token.character(),
"Malformed Any TABLE or ARRAY; must start with [, (, or {");
}
if (isOpen(token.string()[0])) {
// Array or table
deserializeBody(ti, token);
}
else {
throw ParseError(ti.filename(), token.line(), token.character(),
"Malformed Any TABLE or ARRAY; must start with [, (, or {");
}
if (!name.empty()) {
ensureData();
m_data->name = name;
}
} // if NONE
break;
default:
throw ParseError(ti.filename(), token.line(), token.character(),
"Unexpected token");
} // switch
if (!comment.empty()) {
ensureData();
m_data->comment = comment;
}
if (m_type != ARRAY && m_type != TABLE) {
// Array and table already consumed their last token
token = ti.read();
}
}
void XML::deserialize(TextInput& t) {
begin:
Token n = t.read();
m_attribute.clear();
m_child.clear();
m_name = "";
m_value = "";
if ((n.type() == Token::SYMBOL) && (n.string() == "<")) {
// Beginning a tag
// Read name
n = t.read();
debugAssert(n.type() == Token::SYMBOL);
bool isComment =
(n.string() == "!") &&
(t.peek().type() == Token::SYMBOL) &&
(t.peek().string() == "--");
// ignored tag: <?xml> or <!xml>
// comment tag: <!-- ... -->
if ((n.string() == "?") || ((n.string() == "!") && ! isComment)) {
// Ignore this tag
while (t.hasMore() && ! ((n.type() == Token::SYMBOL) && (n.string() == ">"))) {
n = t.read();
}
goto begin;
} else if (isComment) {
// Ignore until "-->"
bool prevWasDash = false;
while (t.hasMore() && ! ((n.type() == Token::SYMBOL) && (n.string() == ">") && prevWasDash)) {
prevWasDash = (n.type() == Token::SYMBOL) && (n.string() == "--");
n = t.read();
}
goto begin;
}
// Keep reading until no colon
m_name += n.string();
n = t.read();
while ((n.type() == Token::SYMBOL) && (n.string() == ":")) {
// tag with namespace: <x:y>
m_name += ":" + t.readSymbol();
n = t.read();
}
// Read end of tag/close
bool done = false;
while (! done) {
debugAssert(n.type() == Token::SYMBOL);
if (n.string() == "/") {
// empty-element tag: <foo/>
// Consume the close tag
t.readSymbol(">");
done = true;
} else if (n.string() == ">") {
// End of open tag: read children until close tag
while (! atClose(t, m_name)) {
m_child.next().deserialize(t);
}
// Read close tag (we wouldn't be here unless it parses correctly)
while (t.hasMore() && ! (t.readSymbol() == ">")) {}
done = true;
} else {
// Attribute pair
std::string k = n.string();
t.readSymbol("=");
std::string v = t.read().string();
m_attribute.set(k, v);
// Advance to next
n = t.read();
}
}
} else {
// Beginning embedded content. Read until the end of file or the next tag.
m_type = VALUE;
m_value += n.string();
n = t.peek();
while (t.hasMore() && ! ((n.type() == Token::SYMBOL) && (n.string() == "<"))) {
m_value += " " + t.read().string();
n = t.peek();
}
}
}
