void InstructionsState::onEvent()
{
while (SDL_PollEvent(&event))
{
if (event.type == SDL_QUIT)
{
applicationStateManager->setNextState(STATE_EXIT);
}
else if (event.type == SDL_KEYDOWN)
{
switch(event.key.keysym.scancode)
{
case SDL_SCANCODE_ESCAPE:
statePop();
break;
}
}
gameEntityManager.onEvent(&event);
}
}
int V3PreProcImp::getStateToken() {
// Return the next state-determined token
while (1) {
next_tok:
if (isEof()) return VP_EOF;
int tok = getRawToken();
ProcState state = m_states.top();
// Most states emit white space and comments between tokens. (Unless collecting a string)
if (tok==VP_WHITE && state !=ps_STRIFY) return (tok);
if (tok==VP_BACKQUOTE && state !=ps_STRIFY) { tok = VP_TEXT; }
if (tok==VP_COMMENT) {
if (!m_off) {
if (m_lexp->m_keepComments == KEEPCMT_SUB) {
string rtn; rtn.assign(yyourtext(),yyourleng());
comment(rtn);
// Need to insure "foo/**/bar" becomes two tokens
insertUnreadback (" ");
} else if (m_lexp->m_keepComments) {
return (tok);
} else {
// Need to insure "foo/**/bar" becomes two tokens
insertUnreadback (" ");
}
}
// We're off or processed the comment specially. If there are newlines
// in it, we also return the newlines as TEXT so that the linenumber
// count is maintained for downstream tools
for (size_t len=0; len<(size_t)yyourleng(); len++) { if (yyourtext()[len]=='\n') m_lineAdd++; }
goto next_tok;
}
if (tok==VP_LINE) {
addLineComment(m_lexp->m_enterExit);
goto next_tok;
}
if (tok==VP_DEFREF_JOIN) {
// Here's something fun and unspecified as yet:
// The existance of non-existance of a base define changes `` expansion
// `define QA_b zzz
// `define Q1 `QA``_b
// 1Q1 -> zzz
// `define QA a
// `Q1 -> a_b
// Note parenthesis make this unambiguous
// `define Q1 `QA()``_b // -> a_b
// This may be a side effect of how `UNDEFINED remains as `UNDEFINED,
// but it screws up our method here. So hardcode it.
string name (yyourtext()+1,yyourleng()-1);
if (defExists(name)) { // JOIN(DEFREF)
// Put back the `` and process the defref
UINFO(5,"```: define "<<name<<" exists, expand first\n");
m_defPutJoin = true; // After define, unputString("``"). Not now as would lose yyourtext()
UINFO(5,"TOKEN now DEFREF\n");
tok = VP_DEFREF;
} else { // DEFREF(JOIN)
UINFO(5,"```: define "<<name<<" doesn't exist, join first\n");
// FALLTHRU, handle as with VP_SYMBOL_JOIN
}
}
if (tok==VP_SYMBOL_JOIN || tok==VP_DEFREF_JOIN) { // not else if, can fallthru from above if()
// a`` -> string doesn't include the ``, so can just grab next and continue
string out (yyourtext(),yyourleng());
UINFO(5,"`` LHS:"<<out<<endl);
// a``b``c can have multiple joins, so we need a stack
m_joinStack.push(out);
statePush(ps_JOIN);
goto next_tok;
}
// Deal with some special parser states
switch (state) {
case ps_TOP: {
break;
}
case ps_DEFNAME_UNDEF: // FALLTHRU
case ps_DEFNAME_DEFINE: // FALLTHRU
case ps_DEFNAME_IFDEF: // FALLTHRU
case ps_DEFNAME_IFNDEF: // FALLTHRU
case ps_DEFNAME_ELSIF: {
if (tok==VP_SYMBOL) {
m_lastSym.assign(yyourtext(),yyourleng());
if (state==ps_DEFNAME_IFDEF
|| state==ps_DEFNAME_IFNDEF) {
bool enable = defExists(m_lastSym);
UINFO(4,"Ifdef "<<m_lastSym<<(enable?" ON":" OFF")<<endl);
if (state==ps_DEFNAME_IFNDEF) enable = !enable;
m_ifdefStack.push(VPreIfEntry(enable,false));
if (!enable) parsingOff();
statePop();
goto next_tok;
}
else if (state==ps_DEFNAME_ELSIF) {
if (m_ifdefStack.empty()) {
error("`elsif with no matching `if\n");
} else {
// Handle `else portion
VPreIfEntry lastIf = m_ifdefStack.top(); m_ifdefStack.pop();
if (!lastIf.on()) parsingOn();
// Handle `if portion
bool enable = !lastIf.everOn() && defExists(m_lastSym);
UINFO(4,"Elsif "<<m_lastSym<<(enable?" ON":" OFF")<<endl);
m_ifdefStack.push(VPreIfEntry(enable, lastIf.everOn()));
if (!enable) parsingOff();
}
statePop();
goto next_tok;
}
else if (state==ps_DEFNAME_UNDEF) {
if (!m_off) {
UINFO(4,"Undef "<<m_lastSym<<endl);
undef(m_lastSym);
}
statePop();
goto next_tok;
}
else if (state==ps_DEFNAME_DEFINE) {
// m_lastSym already set.
stateChange(ps_DEFFORM);
m_lexp->pushStateDefForm();
goto next_tok;
}
else fatalSrc("Bad case\n");
goto next_tok;
}
else if (tok==VP_TEXT) {
// IE, something like comment between define and symbol
if (!m_off) return tok;
else goto next_tok;
}
else if (tok==VP_DEFREF) {
// IE, `ifdef `MACRO(x): Substitue and come back here when state pops.
break;
}
else {
error((string)"Expecting define name. Found: "+tokenName(tok)+"\n");
goto next_tok;
}
}
case ps_DEFFORM: {
if (tok==VP_DEFFORM) {
m_formals = m_lexp->m_defValue;
if (debug()>=5) cout<<"DefFormals='"<<V3PreLex::cleanDbgStrg(m_formals)<<"'\n";
stateChange(ps_DEFVALUE);
m_lexp->pushStateDefValue();
goto next_tok;
} else if (tok==VP_TEXT) {
// IE, something like comment in formals
if (!m_off) return tok;
else goto next_tok;
} else {
error((string)"Expecting define formal arguments. Found: "+tokenName(tok)+"\n");
goto next_tok;
}
}
case ps_DEFVALUE: {
static string newlines;
newlines = "\n"; // Always start with trailing return
if (tok == VP_DEFVALUE) {
if (debug()>=5) cout<<"DefValue='"<<V3PreLex::cleanDbgStrg(m_lexp->m_defValue)
<<"' formals='"<<V3PreLex::cleanDbgStrg(m_formals)<<"'\n";
// Add any formals
string formals = m_formals;
string value = m_lexp->m_defValue;
// Remove returns
// Not removing returns in values has two problems,
// 1. we need to correct line numbers with `line after each substitution
// 2. Substituting in " .... " with embedded returns requires \ escape.
// This is very difficult in the presence of `", so we keep the \ before the newline.
for (size_t i=0; i<formals.length(); i++) {
if (formals[i] == '\n') {
newlines += "\n";
}
}
for (size_t i=0; i<value.length(); i++) {
if (value[i] == '\n') {
newlines += "\n";
}
}
if (!m_off) {
// Remove leading and trailing whitespace
value = trimWhitespace(value, true);
// Define it
UINFO(4,"Define "<<m_lastSym<<" "<<formals
<<" = '"<<V3PreLex::cleanDbgStrg(value)<<"'"<<endl);
define(fileline(), m_lastSym, value, formals, false);
}
} else {
string msg = string("Bad define text, unexpected ")+tokenName(tok)+"\n";
fatalSrc(msg);
}
statePop();
// DEFVALUE is terminated by a return, but lex can't return both tokens.
// Thus, we emit a return here.
yyourtext(newlines.c_str(), newlines.length());
return(VP_WHITE);
}
case ps_DEFPAREN: {
if (tok==VP_TEXT && yyourleng()==1 && yyourtext()[0]=='(') {
stateChange(ps_DEFARG);
goto next_tok;
} else {
if (m_defRefs.empty()) fatalSrc("Shouldn't be in DEFPAREN w/o active defref");
V3DefineRef* refp = &(m_defRefs.top());
error((string)"Expecting ( to begin argument list for define reference `"+refp->name()+"\n");
statePop();
goto next_tok;
}
}
case ps_DEFARG: {
if (m_defRefs.empty()) fatalSrc("Shouldn't be in DEFARG w/o active defref");
V3DefineRef* refp = &(m_defRefs.top());
refp->nextarg(refp->nextarg()+m_lexp->m_defValue); m_lexp->m_defValue="";
UINFO(4,"defarg++ "<<refp->nextarg()<<endl);
if (tok==VP_DEFARG && yyourleng()==1 && yyourtext()[0]==',') {
refp->args().push_back(refp->nextarg());
stateChange(ps_DEFARG);
m_lexp->pushStateDefArg(1);
refp->nextarg("");
goto next_tok;
} else if (tok==VP_DEFARG && yyourleng()==1 && yyourtext()[0]==')') {
// Substitute in and prepare for next action
// Similar code in non-parenthesized define (Search for END_OF_DEFARG)
refp->args().push_back(refp->nextarg());
string out;
if (!m_off) {
out = defineSubst(refp);
//NOP: out = m_preprocp->defSubstitute(out);
}
m_defRefs.pop(); refp=NULL;
if (m_defRefs.empty()) {
statePop();
if (!m_off) unputDefrefString(out);
m_lexp->m_parenLevel = 0;
}
else { // Finished a defref inside a upper defref
// Can't subst now, or
// `define a(ign) x,y
// foo(`a(ign),`b) would break because a contains comma
refp = &(m_defRefs.top()); // We popped, so new top
refp->nextarg(refp->nextarg()+m_lexp->m_defValue+out); m_lexp->m_defValue="";
m_lexp->m_parenLevel = refp->parenLevel();
statePop(); // Will go to ps_DEFARG, as we're under another define
}
goto next_tok;
} else if (tok==VP_DEFREF) {
// Expand it, then state will come back here
// Value of building argument is data before the lower defref
// we'll append it when we push the argument.
break;
} else if (tok==VP_SYMBOL || tok==VP_STRING || VP_TEXT || VP_WHITE) {
string rtn; rtn.assign(yyourtext(),yyourleng());
refp->nextarg(refp->nextarg()+rtn);
goto next_tok;
} else {
error((string)"Expecting ) or , to end argument list for define reference. Found: "+tokenName(tok));
statePop();
goto next_tok;
}
}
case ps_INCNAME: {
if (tok==VP_STRING) {
statePop();
m_lastSym.assign(yyourtext(),yyourleng());
UINFO(4,"Include "<<m_lastSym<<endl);
// Drop leading and trailing quotes.
m_lastSym.erase(0,1);
m_lastSym.erase(m_lastSym.length()-1,1);
include(m_lastSym);
goto next_tok;
}
else if (tok==VP_TEXT && yyourleng()==1 && yyourtext()[0]=='<') {
// include <filename>
stateChange(ps_INCNAME); // Still
m_lexp->pushStateIncFilename();
goto next_tok;
}
else if (tok==VP_DEFREF
|| tok==VP_STRIFY) {
// Expand it, then state will come back here
break;
}
else {
statePop();
error((string)"Expecting include filename. Found: "+tokenName(tok)+"\n");
goto next_tok;
}
}
case ps_ERRORNAME: {
if (tok==VP_STRING) {
if (!m_off) {
m_lastSym.assign(yyourtext(),yyourleng());
error(m_lastSym);
}
statePop();
goto next_tok;
}
else {
error((string)"Expecting `error string. Found: "+tokenName(tok)+"\n");
statePop();
goto next_tok;
}
}
case ps_JOIN: {
if (tok==VP_SYMBOL || tok==VP_TEXT) {
if (m_joinStack.empty()) fatalSrc("`` join stack empty, but in a ``");
string lhs = m_joinStack.top(); m_joinStack.pop();
UINFO(5,"`` LHS:"<<lhs<<endl);
string rhs (yyourtext(),yyourleng());
UINFO(5,"`` RHS:"<<rhs<<endl);
string out = lhs+rhs;
UINFO(5,"`` Out:"<<out<<endl);
unputString(out);
statePop();
goto next_tok;
} else if (tok==VP_EOF || tok==VP_WHITE || tok == VP_COMMENT || tok==VP_STRING) {
error((string)"Expecting symbol to terminate ``; whitespace etc cannot follow ``. Found: "+tokenName(tok)+"\n");
statePop();
goto next_tok;
} else {
// `define, etc, fall through and expand. Pop back here.
break;
}
}
case ps_STRIFY: {
if (tok==VP_STRIFY) {
// Quote what's in the middle of the stringification
// Note a `" MACRO_WITH(`") `" doesn't need to be handled (we don't need a stack)
// That behavior isn't specified, and other simulators vary widely
string out = m_strify;
m_strify = "";
// Convert any newlines to spaces, so we don't get a multiline "..." without \ escapes
// The spec is silent about this either way; simulators vary
string::size_type pos;
while ((pos=out.find("\n")) != string::npos) {
out.replace(pos, 1, " ");
}
unputString((string)"\""+out+"\"");
statePop();
goto next_tok;
}
else if (tok==VP_EOF) {
error("`\" not terminated at EOF\n");
}
else if (tok==VP_BACKQUOTE) {
m_strify += "\\\"";
goto next_tok;
}
else if (tok==VP_DEFREF) {
// Spec says to expand macros inside `"
// Substitue it into the stream, then return here
break;
}
else {
// Append token to eventual string
m_strify.append(yyourtext(),yyourleng());
goto next_tok;
}
}
default: fatalSrc("Bad case\n");
}
// Default is to do top level expansion of some tokens
switch (tok) {
case VP_INCLUDE:
if (!m_off) {
statePush(ps_INCNAME);
}
goto next_tok;
case VP_UNDEF:
statePush(ps_DEFNAME_UNDEF);
goto next_tok;
case VP_DEFINE:
// No m_off check here, as a `ifdef NEVER `define FOO(`endif) should work
statePush(ps_DEFNAME_DEFINE);
goto next_tok;
case VP_IFDEF:
statePush(ps_DEFNAME_IFDEF);
goto next_tok;
case VP_IFNDEF:
statePush(ps_DEFNAME_IFNDEF);
goto next_tok;
case VP_ELSIF:
statePush(ps_DEFNAME_ELSIF);
goto next_tok;
case VP_ELSE:
if (m_ifdefStack.empty()) {
error("`else with no matching `if\n");
} else {
VPreIfEntry lastIf = m_ifdefStack.top(); m_ifdefStack.pop();
bool enable = !lastIf.everOn();
UINFO(4,"Else "<<(enable?" ON":" OFF")<<endl);
m_ifdefStack.push(VPreIfEntry(enable, lastIf.everOn()));
if (!lastIf.on()) parsingOn();
if (!enable) parsingOff();
}
goto next_tok;
case VP_ENDIF:
UINFO(4,"Endif "<<endl);
if (m_ifdefStack.empty()) {
error("`endif with no matching `if\n");
} else {
VPreIfEntry lastIf = m_ifdefStack.top(); m_ifdefStack.pop();
if (!lastIf.on()) parsingOn();
// parsingOn() really only enables parsing if
// all ifdef's above this want it on
}
goto next_tok;
case VP_DEFREF: {
// m_off not right here, but inside substitution, to make this work: `ifdef NEVER `DEFUN(`endif)
string name (yyourtext()+1,yyourleng()-1);
UINFO(4,"DefRef "<<name<<endl);
if (m_defPutJoin) { m_defPutJoin = false; unputString("``"); }
if (m_defDepth++ > V3PreProc::DEFINE_RECURSION_LEVEL_MAX) {
error("Recursive `define substitution: `"+name);
goto next_tok;
}
// substitute
if (!defExists(name)) { // Not found, return original string as-is
m_defDepth = 0;
UINFO(4,"Defref `"<<name<<" => not_defined"<<endl);
if (m_off) {
goto next_tok;
} else {
return (VP_TEXT);
}
}
else {
string params = defParams(name);
if (params=="0" || params=="") { // Found, as simple substitution
if (m_off) {
goto next_tok;
}
else {
V3DefineRef tempref(name, "");
string out = defineSubst(&tempref);
// Similar code in parenthesized define (Search for END_OF_DEFARG)
//NOP: out = m_preprocp->defSubstitute(out);
if (m_defRefs.empty()) {
// Just output the substitution
unputDefrefString(out);
} else {
// Inside another define.
// Can't subst now, or
// `define a x,y
// foo(`a,`b) would break because a contains comma
V3DefineRef* refp = &(m_defRefs.top());
refp->nextarg(refp->nextarg()+m_lexp->m_defValue+out); m_lexp->m_defValue="";
}
goto next_tok;
}
}
else { // Found, with parameters
UINFO(4,"Defref `"<<name<<" => parameterized"<<endl);
// The CURRENT macro needs the paren saved, it's not a property of the child macro
if (!m_defRefs.empty()) m_defRefs.top().parenLevel(m_lexp->m_parenLevel);
m_defRefs.push(V3DefineRef(name, params));
statePush(ps_DEFPAREN);
m_lexp->pushStateDefArg(0);
goto next_tok;
}
}
fatalSrc("Bad case\n");
}
case VP_ERROR: {
statePush(ps_ERRORNAME);
goto next_tok;
}
case VP_EOF:
if (!m_ifdefStack.empty()) {
error("`ifdef not terminated at EOF\n");
}
return tok;
case VP_UNDEFINEALL:
if (!m_off) {
UINFO(4,"Undefineall "<<endl);
undefineall();
}
goto next_tok;
case VP_STRIFY:
// We must expand macros in the body of the stringification
// Then, when done, form a final string to return
// (it could be used as a include filename, for example, so need the string token)
statePush(ps_STRIFY);
goto next_tok;
case VP_SYMBOL:
case VP_STRING:
case VP_TEXT: {
m_defDepth = 0;
if (!m_off) return tok;
else goto next_tok;
}
case VP_WHITE: // Handled at top of loop
case VP_COMMENT: // Handled at top of loop
case VP_DEFFORM: // Handled by state=ps_DEFFORM;
case VP_DEFVALUE: // Handled by state=ps_DEFVALUE;
default:
fatalSrc((string)"Internal error: Unexpected token "+tokenName(tok)+"\n");
break;
}
return tok;
}
}
void stateChange(ProcState state) {
statePop(); statePush(state);
}
