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Add #line functionality to allow expressions instead of just literals. Also made some preprocessor code slightly more clear.

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git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24294 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-12-03 17:19:03 +00:00
parent b06c378cc9
commit 1abc4045ce
4 changed files with 101 additions and 59 deletions
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13
Test/baseResults/cppSimple.vert.out
View File

@ -61,8 +61,17 @@ ERROR: 0:235: 'line continuation' : not supported for this version or the enable
ERROR: 0:236: '#error' : good continuation
ERROR: 0:238: '#' : invalid directive: flizbit
ERROR: 0:242: '#' : invalid directive: directive
ERROR: 0:246: '' : missing #endif
ERROR: 62 compilation errors. No code generated.
ERROR: 0:12001: '#error' : line should be 12001
ERROR: 7:13001: '#error' : line should be 13001 , string 7
ERROR: 7:14014: '#error' : line should be 14014 , string 7
ERROR: 12:14014: '#error' : line should be 14014 , string 12
ERROR: 12:14026: '#error' : line should be 14026 , string 12
ERROR: 12:1234: '#line' : unexpected tokens following directive
ERROR: 12:20001: '#error' : line should be 20001
ERROR: 12:20011: '#error' : line should be 20011
ERROR: 12:20021: '#error' : line should be 20021
ERROR: 12:10003: '' : missing #endif
ERROR: 71 compilation errors. No code generated.
ERROR: node is still EOpNull!

23
Test/cppSimple.vert
View File

@ -241,6 +241,29 @@ double f = f1;
#directive directive was expanded
#line 12000
#error line should be 12001
#line 13000 7
#error line should be 13001, string 7
#define L1 14000
#define L2 13
#define F1 5
#define F2 7
#line L1 + L2
#error line should be 14014, string 7
#line L1 + L2 F1 + F2
#error line should be 14014, string 12
#line L1 + L2 + F1 + F2
#error line should be 14026, string 12
#line 1234 F1 + F2 extra
#line (20000)
#error line should be 20001
#line (20000+10)
#error line should be 20011
#line +20020
#error line should be 20021
#line 10000
#if 1
#else
// ERROR, missing #endif

122
glslang/MachineIndependent/preprocessor/Pp.cpp
View File

@ -125,6 +125,7 @@ int TPpContext::InitCPP()
return 1;
}
// Handle #define
int TPpContext::CPPdefine(TPpToken* ppToken)
{
int token, atom, args[maxMacroArgs], argc;
@ -237,6 +238,7 @@ int TPpContext::CPPdefine(TPpToken* ppToken)
return '\n';
}
// Handle #undef
int TPpContext::CPPundef(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
@ -261,6 +263,7 @@ int TPpContext::CPPundef(TPpToken* ppToken)
return token;
}
// Handle #else
/* Skip forward to appropriate spot. This is used both
** to skip to a #endif after seeing an #else, AND to skip to a #else,
** #elif, or #endif after a #if/#ifdef/#ifndef/#elif test was false.
@ -334,6 +337,7 @@ int TPpContext::CPPelse(int matchelse, TPpToken* ppToken)
return token;
}
// Call when there should be no more tokens left on a line.
int TPpContext::extraTokenCheck(int atom, TPpToken* ppToken, int token)
{
if (token != '\n') {
@ -348,6 +352,8 @@ int TPpContext::extraTokenCheck(int atom, TPpToken* ppToken, int token)
label = "#endif";
else if (atom == ifAtom)
label = "#if";
else if (atom == lineAtom)
label = "#line";
else
label = "";
@ -364,9 +370,9 @@ int TPpContext::extraTokenCheck(int atom, TPpToken* ppToken, int token)
}
enum eval_prec {
MIN_PREC,
MIN_PRECEDENCE,
COND, LOGOR, LOGAND, OR, XOR, AND, EQUAL, RELATION, SHIFT, ADD, MUL, UNARY,
MAX_PREC
MAX_PRECEDENCE
};
namespace {
@ -397,7 +403,7 @@ namespace {
};
struct Tbinops {
int token, prec, (*op)(int, int);
int token, precedence, (*op)(int, int);
} binop[] = {
{ CPP_OR_OP, LOGOR, op_logor },
{ CPP_AND_OP, LOGAND, op_logand },
@ -430,7 +436,7 @@ struct tunops {
#define ALEN(A) (sizeof(A)/sizeof(A[0]))
int TPpContext::eval(int token, int prec, int *res, int *err, TPpToken* ppToken)
int TPpContext::eval(int token, int precedence, int& res, bool& err, TPpToken* ppToken)
{
int i, val;
Symbol *s;
@ -445,19 +451,18 @@ int TPpContext::eval(int token, int prec, int *res, int *err, TPpToken* ppToken)
}
if (token != CPP_IDENTIFIER) {
parseContext.error(ppToken->loc, "incorrect directive, expected identifier", "preprocessor evaluation", "");
*err = 1;
*res = 0;
err = true;
res = 0;
return token;
}
*res = (s = LookUpSymbol(ppToken->atom))
? !s->mac.undef : 0;
res = (s = LookUpSymbol(ppToken->atom)) ? !s->mac.undef : 0;
token = currentInput->scan(this, currentInput, ppToken);
if (needclose) {
if (token != ')') {
parseContext.error(ppToken->loc, "#else after #else", "preprocessor evaluation", "");
*err = 1;
*res = 0;
err = true;
res = 0;
return token;
}
@ -467,8 +472,8 @@ int TPpContext::eval(int token, int prec, int *res, int *err, TPpToken* ppToken)
int macroReturn = MacroExpand(ppToken->atom, ppToken, 1);
if (macroReturn == 0) {
parseContext.error(ppToken->loc, "can't evaluate expression", "preprocessor evaluation", "");
*err = 1;
*res = 0;
err = true;
res = 0;
return token;
} else {
@ -479,26 +484,26 @@ int TPpContext::eval(int token, int prec, int *res, int *err, TPpToken* ppToken)
else {
parseContext.error(ppToken->loc, "undefined macro in expression", "preprocessor evaluation", "");
*err = 1;
err = true;
}
}
}
token = currentInput->scan(this, currentInput, ppToken);
return eval(token, prec, res, err, ppToken);
return eval(token, precedence, res, err, ppToken);
}
}
} else if (token == CPP_INTCONSTANT) {
*res = ppToken->ival;
res = ppToken->ival;
token = currentInput->scan(this, currentInput, ppToken);
} else if (token == '(') {
token = currentInput->scan(this, currentInput, ppToken);
token = eval(token, MIN_PREC, res, err, ppToken);
if (!*err) {
token = eval(token, MIN_PRECEDENCE, res, err, ppToken);
if (! err) {
if (token != ')') {
parseContext.error(ppToken->loc, "expected ')'", "preprocessor evaluation", "");
*err = 1;
*res = 0;
err = true;
res = 0;
return token;
}
@ -512,37 +517,37 @@ int TPpContext::eval(int token, int prec, int *res, int *err, TPpToken* ppToken)
if (i >= 0) {
token = currentInput->scan(this, currentInput, ppToken);
token = eval(token, UNARY, res, err, ppToken);
*res = unop[i].op(*res);
res = unop[i].op(res);
} else {
parseContext.error(ppToken->loc, "bad expression", "preprocessor evaluation", "");
*err = 1;
*res = 0;
err = true;
res = 0;
return token;
}
}
while (!*err) {
while (! err) {
if (token == ')' || token == '\n')
break;
for (i = ALEN(binop) - 1; i >= 0; i--) {
if (binop[i].token == token)
break;
}
if (i < 0 || binop[i].prec <= prec)
if (i < 0 || binop[i].precedence <= precedence)
break;
val = *res;
val = res;
token = currentInput->scan(this, currentInput, ppToken);
token = eval(token, binop[i].prec, res, err, ppToken);
*res = binop[i].op(val, *res);
token = eval(token, binop[i].precedence, res, err, ppToken);
res = binop[i].op(val, res);
}
return token;
} // eval
}
// Handle #if
int TPpContext::CPPif(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
int res = 0, err = 0;
elsetracker++;
if (! ifdepth++)
ifloc = ppToken->loc;
@ -550,7 +555,9 @@ int TPpContext::CPPif(TPpToken* ppToken)
parseContext.error(ppToken->loc, "maximum nesting depth exceeded", "#if", "");
return 0;
}
token = eval(token, MIN_PREC, &res, &err, ppToken);
int res = 0;
bool err = false;
token = eval(token, MIN_PRECEDENCE, res, err, ppToken);
token = extraTokenCheck(ifAtom, ppToken, token);
if (!res && !err)
token = CPPelse(1, ppToken);
@ -558,7 +565,8 @@ int TPpContext::CPPif(TPpToken* ppToken)
return token;
}
int TPpContext::CPPifdef(int defined, TPpToken * ppToken)
// Handle #ifdef
int TPpContext::CPPifdef(int defined, TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
int name = ppToken->atom;
@ -588,35 +596,36 @@ int TPpContext::CPPifdef(int defined, TPpToken * ppToken)
}
// Handle #line
int TPpContext::CPPline(TPpToken * ppToken)
int TPpContext::CPPline(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
if (token == '\n') {
parseContext.error(ppToken->loc, "must by followed by an integral literal", "#line", "");
return token;
}
else if (token == CPP_INTCONSTANT) {
parseContext.setCurrentLine(atoi(ppToken->name));
token = currentInput->scan(this, currentInput, ppToken);
if (token == CPP_INTCONSTANT) {
parseContext.setCurrentString(atoi(ppToken->name));
token = currentInput->scan(this, currentInput, ppToken);
if (token != '\n')
parseContext.error(parseContext.getCurrentLoc(), "cannot be followed by more than two integral literals", "#line", "");
} else if (token == '\n')
return token;
else
parseContext.error(parseContext.getCurrentLoc(), "second argument can only be an integral literal", "#line", "");
} else
parseContext.error(parseContext.getCurrentLoc(), "first argument can only be an integral literal", "#line", "");
int lineRes = 0;
bool lineErr = false;
token = eval(token, MIN_PRECEDENCE, lineRes, lineErr, ppToken);
if (! lineErr) {
if (token == '\n')
++lineRes;
parseContext.setCurrentLine(lineRes);
if (token != '\n') {
int fileRes = 0;
bool fileErr = false;
token = eval(token, MIN_PRECEDENCE, fileRes, fileErr, ppToken);
if (! fileErr)
parseContext.setCurrentString(fileRes);
}
}
token = extraTokenCheck(lineAtom, ppToken, token);
return token;
}
// Handle #error
int TPpContext::CPPerror(TPpToken * ppToken)
int TPpContext::CPPerror(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
std::string message;
@ -640,6 +649,7 @@ int TPpContext::CPPerror(TPpToken * ppToken)
return '\n';
}
// Handle #pragma
int TPpContext::CPPpragma(TPpToken* ppToken)
{
char SrcStrName[2];
@ -679,8 +689,8 @@ int TPpContext::CPPpragma(TPpToken* ppToken)
return token;
}
// This is just for error checking: the version and profile are decided before preprocessing starts
int TPpContext::CPPversion(TPpToken * ppToken)
// #version: This is just for error checking: the version and profile are decided before preprocessing starts
int TPpContext::CPPversion(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
@ -717,11 +727,11 @@ int TPpContext::CPPversion(TPpToken * ppToken)
}
return token;
} // CPPversion
}
int TPpContext::CPPextension(TPpToken * ppToken)
// Handle #extension
int TPpContext::CPPextension(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
char extensionName[80];
@ -756,9 +766,9 @@ int TPpContext::CPPextension(TPpToken * ppToken)
parseContext.error(ppToken->loc, "extra tokens -- expected newline", "#extension","");
return token;
} // CPPextension
}
int TPpContext::readCPPline(TPpToken * ppToken)
int TPpContext::readCPPline(TPpToken* ppToken)
{
int token = currentInput->scan(this, currentInput, ppToken);
bool isVersion = false;
@ -847,7 +857,7 @@ void TPpContext::PopEofSrc()
}
}
TPpContext::TokenStream* TPpContext::PrescanMacroArg(TokenStream *a, TPpToken * ppToken)
TPpContext::TokenStream* TPpContext::PrescanMacroArg(TokenStream *a, TPpToken* ppToken)
{
int token;
TokenStream *n;

2
glslang/MachineIndependent/preprocessor/PpContext.h
View File

@ -244,7 +244,7 @@ protected:
int CPPundef(TPpToken * ppToken);
int CPPelse(int matchelse, TPpToken * ppToken);
int extraTokenCheck(int atom, TPpToken* ppToken, int token);
int eval(int token, int prec, int *res, int *err, TPpToken * ppToken);
int eval(int token, int precedence, int& res, bool& err, TPpToken * ppToken);
int CPPif (TPpToken * ppToken);
int CPPifdef(int defined, TPpToken * ppToken);
int CPPline(TPpToken * ppToken);