Pp.cpp | Explore in Territory

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#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif

#include <sstream>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <climits>

#include "PpContext.h"
#include "PpTokens.h"

namespace glslang {

// Handle #define
int TPpContext::CPPdefine(TPpToken* ppToken)
{ … }

// Handle #undef
int TPpContext::CPPundef(TPpToken* ppToken)
{ … }

// 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.
*/
int TPpContext::CPPelse(int matchelse, TPpToken* ppToken)
{ … }

// Call when there should be no more tokens left on a line.
int TPpContext::extraTokenCheck(int contextAtom, TPpToken* ppToken, int token)
{ … }

enum eval_prec { … };

namespace {

    int op_logor(int a, int b) { … }
    int op_logand(int a, int b) { … }
    int op_or(int a, int b) { … }
    int op_xor(int a, int b) { … }
    int op_and(int a, int b) { … }
    int op_eq(int a, int b) { … }
    int op_ne(int a, int b) { … }
    int op_ge(int a, int b) { … }
    int op_le(int a, int b) { … }
    int op_gt(int a, int b) { … }
    int op_lt(int a, int b) { … }
    int op_shl(int a, int b) { … }
    int op_shr(int a, int b) { … }
    int op_add(int a, int b) { … }
    int op_sub(int a, int b) { … }
    int op_mul(int a, int b) { … }
    int op_div(int a, int b) { … }
    int op_mod(int a, int b) { … }
    int op_pos(int a) { … }
    int op_neg(int a) { … }
    int op_cmpl(int a) { … }
    int op_not(int a) { … }

struct TBinop { … } binop[] = …;

struct TUnop { … } unop[] = …;

} // anonymous namespace

#define NUM_ELEMENTS(A) …

int TPpContext::eval(int token, int precedence, bool shortCircuit, int& res, bool& err, TPpToken* ppToken)
{ … }

// Expand macros, skipping empty expansions, to get to the first real token in those expansions.
int TPpContext::evalToToken(int token, bool shortCircuit, int& res, bool& err, TPpToken* ppToken)
{ … }

// Handle #if
int TPpContext::CPPif(TPpToken* ppToken)
{ … }

// Handle #ifdef
int TPpContext::CPPifdef(int defined, TPpToken* ppToken)
{ … }

// Handle #include ...
// TODO: Handle macro expansions for the header name
int TPpContext::CPPinclude(TPpToken* ppToken)
{ … }

// Handle #line
int TPpContext::CPPline(TPpToken* ppToken)
{ … }

// Handle #error
int TPpContext::CPPerror(TPpToken* ppToken)
{ … }

// Handle #pragma
int TPpContext::CPPpragma(TPpToken* ppToken)
{ … }

// #version: This is just for error checking: the version and profile are decided before preprocessing starts
int TPpContext::CPPversion(TPpToken* ppToken)
{ … }

// Handle #extension
int TPpContext::CPPextension(TPpToken* ppToken)
{ … }

int TPpContext::readCPPline(TPpToken* ppToken)
{ … }

// Context-dependent parsing of a #include <header-name>.
// Assumes no macro expansions etc. are being done; the name is just on the current input.
// Always creates a name and returns PpAtomicConstString, unless we run out of input.
int TPpContext::scanHeaderName(TPpToken* ppToken, char delimit)
{ … }

// Macro-expand a macro argument 'arg' to create 'expandedArg'.
// Does not replace 'arg'.
// Returns nullptr if no expanded argument is created.
TPpContext::TokenStream* TPpContext::PrescanMacroArg(TokenStream& arg, TPpToken* ppToken, bool newLineOkay)
{ … }

//
// Return the next token for a macro expansion, handling macro arguments,
// whose semantics are dependent on being adjacent to ##.
//
int TPpContext::tMacroInput::scan(TPpToken* ppToken)
{ … }

// return a textual zero, for scanning a macro that was never defined
int TPpContext::tZeroInput::scan(TPpToken* ppToken)
{ … }

//
// Check a token to see if it is a macro that should be expanded:
// - If it is, and defined, push a tInput that will produce the appropriate
//   expansion and return MacroExpandStarted.
// - If it is, but undefined, and expandUndef is requested, push a tInput
//   that will expand to 0 and return MacroExpandUndef.
// - Otherwise, there is no expansion, and there are two cases:
//   * It might be okay there is no expansion, and no specific error was
//     detected. Returns MacroExpandNotStarted.
//   * The expansion was started, but could not be completed, due to an error
//     that cannot be recovered from. Returns MacroExpandError.
//
MacroExpandResult TPpContext::MacroExpand(TPpToken* ppToken, bool expandUndef, bool newLineOkay)
{ … }

} // end namespace glslang
chromium/third_party/glslang/src/glslang/MachineIndependent/preprocessor/Pp.cpp
