CfgList* CfgValue::LoadFile (std::string name)
{
InputBuffer buf;
FILE *f = fopen (name.c_str(), "rb");
if (!f)
throw ContentException(SPrintf("Failed to open file %s\n", name.c_str()));
fseek (f, 0, SEEK_END);
buf.len = ftell(f);
buf.data = new char [buf.len];
fseek (f, 0, SEEK_SET);
if (!fread (buf.data, buf.len, 1, f))
{
fclose (f);
delete[] buf.data;
throw ContentException(SPrintf("Failed to read file %s\n", name.c_str()));
}
buf.filename = name.c_str();
fclose (f);
CfgList *nlist = new CfgList;
try {
nlist->Parse (buf, true);
} catch (const ContentException &e) {
delete[] buf.data;
delete nlist;
throw e;
}
delete[] buf.data;
return nlist;
}
CfgValue* CfgValue::ParseValue (InputBuffer& buf)
{
CfgValue *v = 0;
if (buf.skipWhitespace ())
buf.expecting ("Value");
// parse value types:
int token = nextToken (buf);
switch (token) {
case CT_LIST:
v = new CfgList();
break;
case CT_NUMERIC:
v = new CfgNumeric();
break;
case CT_LITERAL:
v = new CfgLiteral();
break;
case CT_COMMAND: {
++buf;
std::string cmd = buf.parseIdent();
d_trace("Cmd: %s\n", cmd.c_str());
if (cmd == "include") {
return LoadNestedFile(buf);
} else {
throw ContentException(SPrintf("%s. Unknown command: %s", buf.location().c_str() ,cmd.c_str()));
}
}
case CT_IDENT:
throw ContentException(buf.location() + SPrintf("Unexpected identifier: '%s'", buf.parseIdent()) );
}
if (v) {
try {
v->Parse(buf);
v->cfgFilePath = buf.filename;
} catch(const ContentException& e) {
delete v;
throw e;
}
}
return v;
}
XnbReader* ContentManager::load(const char* name)
{
std::string fullName = m_rootDirectory + name + ".xnb";
#if defined NXNA_PLATFORM_ANDROID
FileStream* fs = AndroidFileSystem::Open(fullName.c_str());
#else
FileStream* fs = new FileStream(fullName.c_str());
#endif
if (fs == nullptr || fs->IsOpen() == false)
throw ContentException(std::string("Unable to open file: ") + fullName);
return new XnbReader(fs, name, fullName.c_str(), this);
}
std::string InputBuffer::parseIdent ()
{
std::string name;
if(isalnum (get()))
{
name += get();
for (next(); isalnum (get()) || get() == '_' || get() == '-'; next())
name += get();
return name;
}
else
throw ContentException(SPrintf("%s: Expecting an identifier instead of '%c'\n", location().c_str(), get()));
}
void InputBuffer::skipKeyword (const char *kw)
{
skipWhitespace();
int a=0;
while (!end() && kw[a])
{
if (get() != kw[a])
break;
next(), ++a;
}
if (kw[a])
throw ContentException(SPrintf("%s: Expecting keyword %s\n", location().c_str(), kw));
}
static int nextToken (InputBuffer& buf) {
buf.skipWhitespace();
char r = *buf;
if (r == '@') // special command
return CT_COMMAND;
else if(isalpha (r))
return CT_IDENT;
else if(isdigit (r) || r == '.' || r == '-')
return CT_NUMERIC;
else if(r == '"')
return CT_LITERAL;
else if(r == '{')
return CT_LIST;
else if(r == ',')
return CT_COMMA;
throw ContentException(SPrintf("Unexpected character '%c'. ", r) + buf.location());
}
void CfgListElem::Parse (InputBuffer& buf)
{
if (buf.skipWhitespace ())
throw ContentException("Unexpected end of file in list element: " + buf.location());
// parse name
int token = nextToken(buf);
if (token == CT_COMMA) {
++buf;
token = nextToken(buf);
}
if (token == CT_IDENT) {
name = buf.parseIdent();
buf.skipWhitespace ();
if (*buf != '=')
buf.expecting("'=' character");
++buf;
}
value = CfgValue::ParseValue (buf);
}
void InputBuffer::expecting (const char *s)
{
throw ContentException (location() + "Expecting " + std::string(s) + "\n");
}