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acc/parse.c
rhinoduck 701c391c3f Fix for function return value speculation 
- a speculated function is now marked as returning a value if it is called as such at any point before its definition
- no unwarranted errors about missing return values are raised for speculated functions anymore
2016-01-08 16:36:34 -06:00

4645 lines
107 KiB
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//**************************************************************************
//**
//** parse.c
//**
//**************************************************************************
// HEADER FILES ------------------------------------------------------------
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <assert.h>
#include "common.h"
#include "parse.h"
#include "symbol.h"
#include "pcode.h"
#include "token.h"
#include "error.h"
#include "misc.h"
#include "strlist.h"
// MACROS ------------------------------------------------------------------
#define MAX_STATEMENT_DEPTH 128
#define MAX_BREAK 128
#define MAX_CONTINUE 128
#define MAX_CASE 128
#define EXPR_STACK_DEPTH 64
// TYPES -------------------------------------------------------------------
typedef enum
{
STMT_SCRIPT,
STMT_IF,
STMT_ELSE,
STMT_DO,
STMT_WHILEUNTIL,
STMT_SWITCH,
STMT_FOR
} statement_t;
typedef struct
{
int level;
int addressPtr;
} breakInfo_t;
typedef struct
{
int level;
int addressPtr;
} continueInfo_t;
typedef struct
{
int level;
int value;
boolean isDefault;
int address;
} caseInfo_t;
typedef struct prefunc_s
{
struct prefunc_s *next;
symbolNode_t *sym;
int address;
int argcount;
int line;
char *source;
} prefunc_t;
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
static void CountScript(int type);
static void Outside(void);
static void OuterScript(void);
static void OuterFunction(void);
static void OuterMapVar(boolean local);
static void OuterWorldVar(boolean isGlobal);
static void OuterSpecialDef(void);
static void OuterDefine(boolean force);
static void OuterInclude(void);
static void OuterImport(void);
static boolean ProcessStatement(statement_t owner);
static void LeadingCompoundStatement(statement_t owner);
static void LeadingVarDeclare(void);
static void LeadingLineSpecial(boolean executewait);
static void LeadingFunction(boolean executewait);
static void LeadingIdentifier(void);
static void BuildPrintString(void);
static void ActionOnCharRange(boolean write);
static void LeadingStrcpy(void);
static void LeadingPrint(void);
static void LeadingHudMessage(void);
static void LeadingVarAssign(symbolNode_t *sym);
static pcd_t GetAssignPCD(tokenType_t token, symbolType_t symbol);
static void LeadingInternFunc(symbolNode_t *sym);
static void LeadingScriptFunc(symbolNode_t *sym);
static void LeadingSuspend(void);
static void LeadingTerminate(void);
static void LeadingRestart(void);
static void LeadingReturn(void);
static void LeadingIf(void);
static void LeadingFor(void);
static void LeadingWhileUntil(void);
static void LeadingDo(void);
static void LeadingSwitch(void);
static void LeadingCase(void);
static void LeadingDefault(void);
static void LeadingBreak(void);
static void LeadingContinue(void);
static void LeadingCreateTranslation(void);
static void LeadingIncDec(int token);
static void PushCase(int value, boolean isDefault);
static caseInfo_t *GetCaseInfo(void);
static int CaseInfoCmp(const void *a, const void *b);
static boolean DefaultInCurrent(void);
static void PushBreak(void);
static void WriteBreaks(void);
static boolean BreakAncestor(void);
static void PushContinue(void);
static void WriteContinues(int address);
static boolean ContinueAncestor(void);
static void ProcessInternFunc(symbolNode_t *sym);
static void ProcessScriptFunc(symbolNode_t *sym, boolean discardReturn);
static void EvalExpression(void);
static void ExprLevX(int level);
static void ExprLevA(void);
static void ExprFactor(void);
static void ConstExprFactor(void);
static void SendExprCommand(pcd_t pcd);
static void PushExStk(int value);
static int PopExStk(void);
static pcd_t TokenToPCD(tokenType_t token);
static pcd_t GetPushVarPCD(symbolType_t symType);
static pcd_t GetIncDecPCD(tokenType_t token, symbolType_t symbol);
static int EvalConstExpression(void);
static void ParseArrayDims(int *size, int *ndim, int dims[MAX_ARRAY_DIMS]);
static void SymToArray(int symtype, symbolNode_t *sym, int index, int ndim, int size, int dims[MAX_ARRAY_DIMS]);
static void ParseArrayIndices(symbolNode_t *sym, int requiredIndices);
static void InitializeArray(symbolNode_t *sym, int dims[MAX_ARRAY_DIMS], int size);
static void InitializeScriptArray(symbolNode_t *sym, int dims[MAX_ARRAY_DIMS]);
static symbolNode_t *DemandSymbol(char *name);
static symbolNode_t *SpeculateSymbol(char *name, boolean hasReturn);
static symbolNode_t *SpeculateFunction(const char *name, boolean hasReturn);
static void UnspeculateFunction(symbolNode_t *sym);
static void AddScriptFuncRef(symbolNode_t *sym, int address, int argcount);
static void CheckForUndefinedFunctions(void);
static void SkipBraceBlock(int depth);
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
int pa_ScriptCount;
struct ScriptTypes *pa_TypedScriptCounts;
int pa_MapVarCount;
int pa_WorldVarCount;
int pa_GlobalVarCount;
int pa_WorldArrayCount;
int pa_GlobalArrayCount;
enum ImportModes ImportMode = IMPORT_None;
boolean ExporterFlagged;
boolean pa_ConstExprIsString;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static int ScriptVarCount;
static int ScriptArrayCount;
static int ScriptArraySize[MAX_SCRIPT_ARRAYS];
static statement_t StatementHistory[MAX_STATEMENT_DEPTH];
static int StatementIndex;
static breakInfo_t BreakInfo[MAX_BREAK];
static int BreakIndex;
static continueInfo_t ContinueInfo[MAX_CONTINUE];
static int ContinueIndex;
static caseInfo_t CaseInfo[MAX_CASE];
static int CaseIndex;
static int StatementLevel;
static int ExprStack[EXPR_STACK_DEPTH];
static int ExprStackIndex;
static boolean ConstantExpression;
static symbolNode_t *InsideFunction;
static prefunc_t *FillinFunctions;
static prefunc_t **FillinFunctionsLatest = &FillinFunctions;
static boolean ArrayHasStrings;
static int AdjustStmtLevel[] =
{
0, // STMT_SCRIPT
0, // STMT_IF
0, // STMT_ELSE
1, // STMT_DO
1, // STMT_WHILEUNTIL
1, // STMT_SWITCH
1 // STMT_FOR
};
static boolean IsBreakRoot[] =
{
NO, // STMT_SCRIPT
NO, // STMT_IF
NO, // STMT_ELSE
YES, // STMT_DO
YES, // STMT_WHILEUNTIL
YES, // STMT_SWITCH
YES // STMT_FOR
};
static boolean IsContinueRoot[] =
{
NO, // STMT_SCRIPT
NO, // STMT_IF
NO, // STMT_ELSE
YES, // STMT_DO
YES, // STMT_WHILEUNTIL
NO, // STMT_SWITCH
YES // STMT_FOR
};
static tokenType_t LevAOps[] =
{
TK_ORLOGICAL,
TK_NONE
};
static tokenType_t LevBOps[] =
{
TK_ANDLOGICAL,
TK_NONE
};
static tokenType_t LevCOps[] =
{
TK_ORBITWISE,
TK_NONE
};
static tokenType_t LevDOps[] =
{
TK_EORBITWISE,
TK_NONE
};
static tokenType_t LevEOps[] =
{
TK_ANDBITWISE,
TK_NONE
};
static tokenType_t LevFOps[] =
{
TK_EQ,
TK_NE,
TK_NONE
};
static tokenType_t LevGOps[] =
{
TK_LT,
TK_LE,
TK_GT,
TK_GE,
TK_NONE
};
static tokenType_t LevHOps[] =
{
TK_LSHIFT,
TK_RSHIFT,
TK_NONE
};
static tokenType_t LevIOps[] =
{
TK_PLUS,
TK_MINUS,
TK_NONE
};
static tokenType_t LevJOps[] =
{
TK_ASTERISK,
TK_SLASH,
TK_PERCENT,
TK_NONE
};
static tokenType_t *OpsList[] =
{
LevAOps,
LevBOps,
LevCOps,
LevDOps,
LevEOps,
LevFOps,
LevGOps,
LevHOps,
LevIOps,
LevJOps,
NULL
};
static tokenType_t AssignOps[] =
{
TK_ASSIGN,
TK_ADDASSIGN,
TK_SUBASSIGN,
TK_MULASSIGN,
TK_DIVASSIGN,
TK_MODASSIGN,
TK_ANDASSIGN,
TK_EORASSIGN,
TK_ORASSIGN,
TK_LSASSIGN,
TK_RSASSIGN,
TK_NONE
};
static struct ScriptTypes ScriptCounts[] =
{
{ "closed", 0, 0 },
{ "open", OPEN_SCRIPTS_BASE, 0 },
{ "respawn", RESPAWN_SCRIPTS_BASE, 0 },
{ "death", DEATH_SCRIPTS_BASE, 0 },
{ "enter", ENTER_SCRIPTS_BASE, 0 },
{ "pickup", PICKUP_SCRIPTS_BASE, 0 },
{ "bluereturn", BLUE_RETURN_SCRIPTS_BASE, 0 },
{ "redreturn", RED_RETURN_SCRIPTS_BASE, 0 },
{ "whitereturn", WHITE_RETURN_SCRIPTS_BASE, 0 },
{ "lightning", LIGHTNING_SCRIPTS_BASE, 0 },
{ "disconnect", DISCONNECT_SCRIPTS_BASE, 0 },
{ "unloading", UNLOADING_SCRIPTS_BASE, 0 },
{ "return", RETURN_SCRIPTS_BASE, 0 },
{ "event", EVENT_SCRIPTS_BASE, 0 },
{ NULL, -1, 0 }
};
// CODE --------------------------------------------------------------------
//==========================================================================
//
// PA_Parse
//
//==========================================================================
void PA_Parse(void)
{
int i;
pa_ScriptCount = 0;
pa_TypedScriptCounts = ScriptCounts;
for (i = 0; ScriptCounts[i].TypeName != NULL; i++)
{
ScriptCounts[i].TypeCount = 0;
}
pa_MapVarCount = 0;
pa_WorldVarCount = 0;
pa_GlobalVarCount = 0;
pa_WorldArrayCount = 0;
pa_GlobalArrayCount = 0;
TK_NextToken();
Outside();
CheckForUndefinedFunctions();
ERR_Finish();
}
//==========================================================================
//
// CountScript
//
//==========================================================================
static void CountScript(int type)
{
int i;
for (i = 0; ScriptCounts[i].TypeName != NULL; i++)
{
if (ScriptCounts[i].TypeBase == type)
{
if (type != 0)
{
MS_Message(MSG_DEBUG, "Script type: %s\n",
ScriptCounts[i].TypeName);
}
ScriptCounts[i].TypeCount++;
return;
}
}
return;
}
//==========================================================================
//
// Outside
//
//==========================================================================
static void Outside(void)
{
boolean done;
done = NO;
while(done == NO)
{
switch(tk_Token)
{
case TK_EOF:
done = YES;
break;
case TK_SCRIPT:
OuterScript();
break;
case TK_FUNCTION:
OuterFunction();
break;
case TK_INT:
case TK_STR:
case TK_BOOL:
OuterMapVar(NO);
break;
case TK_WORLD:
OuterWorldVar(NO);
break;
case TK_GLOBAL:
OuterWorldVar(YES);
break;
case TK_SPECIAL:
OuterSpecialDef();
break;
case TK_NUMBERSIGN:
TK_NextToken();
switch(tk_Token)
{
case TK_DEFINE:
OuterDefine(NO);
break;
case TK_LIBDEFINE:
OuterDefine(YES);
break;
case TK_INCLUDE:
OuterInclude();
break;
case TK_NOCOMPACT:
if(ImportMode != IMPORT_Importing)
{
if(pc_Address != 8)
{
ERR_Error(ERR_NOCOMPACT_NOT_HERE, YES);
}
MS_Message(MSG_DEBUG, "Forcing NoShrink\n");
pc_NoShrink = TRUE;
}
TK_NextToken();
break;
case TK_WADAUTHOR:
if(ImportMode != IMPORT_Importing)
{
MS_Message(MSG_DEBUG, "Will write WadAuthor-compatible object\n");
MS_Message(MSG_NORMAL, "You don't need to use #wadauthor anymore.\n");
pc_WadAuthor = TRUE;
}
TK_NextToken();
break;
case TK_NOWADAUTHOR:
if(ImportMode != IMPORT_Importing)
{
MS_Message(MSG_DEBUG, "Will write WadAuthor-incompatible object\n");
pc_WadAuthor = FALSE;
}
TK_NextToken();
break;
case TK_ENCRYPTSTRINGS:
if(ImportMode != IMPORT_Importing)
{
MS_Message(MSG_DEBUG, "Strings will be encrypted\n");
pc_EncryptStrings = TRUE;
if(pc_EnforceHexen)
{
ERR_Error(ERR_HEXEN_COMPAT, YES);
}
}
TK_NextToken();
break;
case TK_IMPORT:
OuterImport();
break;
case TK_LIBRARY:
TK_NextTokenMustBe(TK_STRING, ERR_STRING_LIT_NOT_FOUND);
if(ImportMode == IMPORT_None)
{
MS_Message(MSG_DEBUG, "Allocations modified for exporting\n");
ImportMode = IMPORT_Exporting;
if(pc_EnforceHexen)
{
ERR_Error(ERR_HEXEN_COMPAT, YES);
}
}
else if(ImportMode == IMPORT_Importing)
{
PC_AddImport(tk_String);
ExporterFlagged = YES;
}
TK_NextToken();
break;
default:
ERR_Error(ERR_INVALID_DIRECTIVE, YES);
TK_SkipLine();
break;
}
break;
default:
ERR_Exit(ERR_INVALID_DECLARATOR, YES, NULL);
break;
}
}
}
//==========================================================================
//
// OuterScript
//
//==========================================================================
static void OuterScript(void)
{
int scriptNumber;
symbolNode_t *sym;
int scriptType, scriptFlags;
MS_Message(MSG_DEBUG, "---- OuterScript ----\n");
BreakIndex = 0;
CaseIndex = 0;
StatementLevel = 0;
ScriptVarCount = 0;
ScriptArrayCount = 0;
SY_FreeLocals();
TK_NextToken();
if(ImportMode == IMPORT_Importing)
{
// When importing, the script number is not recorded, because
// it might be a #define that is not included by the main .acs
// file, so processing it would generate a syntax error.
SkipBraceBlock(0);
TK_NextToken();
return;
}
// [RH] If you want to use script 0, it must be written as <<0>>.
// This is to avoid using it accidentally, since ZDoom uses script
// 0 to implement many of the Strife-specific line specials.
if(tk_Token == TK_LSHIFT)
{
TK_NextTokenMustBe(TK_NUMBER, ERR_SCRIPT_OUT_OF_RANGE);
if(tk_Number != 0)
{
ERR_Exit(ERR_SCRIPT_OUT_OF_RANGE, YES, NULL);
}
TK_NextTokenMustBe(TK_RSHIFT, ERR_SCRIPT_OUT_OF_RANGE);
TK_NextToken();
scriptNumber = 0;
}
else if(tk_Token == TK_STRING)
{ // Named scripts start counting at -1 and go down from there.
if(strcasecmp("None", tk_String) == 0)
{
ERR_Error(ERR_SCRIPT_NAMED_NONE, YES, NULL);
}
scriptNumber = -1 - STR_FindInListInsensitive(STRLIST_NAMEDSCRIPTS, tk_String);
TK_NextToken();
}
else
{
scriptNumber = EvalConstExpression();
if(scriptNumber < 1 || scriptNumber > 32767)
{
TK_Undo();
ERR_Error(ERR_SCRIPT_OUT_OF_RANGE, YES, NULL);
SkipBraceBlock(0);
TK_NextToken();
return;
}
}
if (scriptNumber >= 0)
{
MS_Message(MSG_DEBUG, "Script number: %d\n", scriptNumber);
}
else
{
MS_Message(MSG_DEBUG, "Script name: %s (%d)\n",
STR_GetString(STRLIST_NAMEDSCRIPTS, -scriptNumber - 1),
scriptNumber);
}
scriptType = 0;
scriptFlags = 0;
if(tk_Token == TK_LPAREN)
{
if(TK_NextToken() == TK_VOID)
{
TK_NextTokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
else
{
TK_Undo();
do
{
TK_NextTokenMustBe(TK_INT, ERR_BAD_VAR_TYPE);
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
if(ScriptVarCount == 4)
{
ERR_Error(ERR_TOO_MANY_SCRIPT_ARGS, YES);
}
if(SY_FindLocal(tk_String) != NULL)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
}
else if(ScriptVarCount < 4)
{
sym = SY_InsertLocal(tk_String, SY_SCRIPTVAR);
sym->info.var.index = ScriptVarCount;
ScriptVarCount++;
}
TK_NextToken();
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
TK_NextToken();
switch(tk_Token)
{
case TK_DISCONNECT:
scriptType = DISCONNECT_SCRIPTS_BASE;
if(ScriptVarCount != 1)
{
ERR_Error(ERR_DISCONNECT_NEEDS_1_ARG, YES);
}
break;
case TK_OPEN:
case TK_RESPAWN:
case TK_DEATH:
case TK_ENTER:
case TK_PICKUP:
case TK_BLUERETURN:
case TK_REDRETURN:
case TK_WHITERETURN:
case TK_LIGHTNING:
case TK_UNLOADING:
case TK_RETURN:
ERR_Error(ERR_UNCLOSED_WITH_ARGS, YES);
break;
case TK_EVENT:
scriptType = EVENT_SCRIPTS_BASE;
if(ScriptVarCount != 3)
{
ERR_Error(ERR_EVENT_NEEDS_3_ARG, YES);
}
break;
default:
TK_Undo();
}
MS_Message(MSG_DEBUG, "Script type: %s (%d %s)\n",
scriptType == 0 ? "closed" : "disconnect",
ScriptVarCount, ScriptVarCount == 1 ? "arg" : "args");
}
else switch (tk_Token)
{
case TK_OPEN:
scriptType = OPEN_SCRIPTS_BASE;
break;
case TK_RESPAWN: // [BC]
scriptType = RESPAWN_SCRIPTS_BASE;
break;
case TK_DEATH: // [BC]
scriptType = DEATH_SCRIPTS_BASE;
break;
case TK_ENTER: // [BC]
scriptType = ENTER_SCRIPTS_BASE;
break;
case TK_RETURN:
scriptType = RETURN_SCRIPTS_BASE;
break;
case TK_PICKUP: // [BC]
scriptType = PICKUP_SCRIPTS_BASE;
break;
case TK_BLUERETURN: // [BC]
scriptType = BLUE_RETURN_SCRIPTS_BASE;
break;
case TK_REDRETURN: // [BC]
scriptType = RED_RETURN_SCRIPTS_BASE;
break;
case TK_WHITERETURN: // [BC]
scriptType = WHITE_RETURN_SCRIPTS_BASE;
break;
case TK_LIGHTNING:
scriptType = LIGHTNING_SCRIPTS_BASE;
break;
case TK_UNLOADING:
scriptType = UNLOADING_SCRIPTS_BASE;
break;
case TK_DISCONNECT:
scriptType = DISCONNECT_SCRIPTS_BASE;
ERR_Error (ERR_DISCONNECT_NEEDS_1_ARG, YES);
break;
case TK_EVENT: // [BB]
scriptType = EVENT_SCRIPTS_BASE;
ERR_Error (ERR_EVENT_NEEDS_3_ARG, YES);
break;
default:
ERR_Error(ERR_BAD_SCRIPT_DECL, YES);
SkipBraceBlock(0);
TK_NextToken();
return;
}
TK_NextToken();
if(tk_Token == TK_NET)
{
scriptFlags |= NET_SCRIPT_FLAG;
TK_NextToken();
}
// [BB] If NET and CLIENTSIDE are specified, this construction can only parse
// "NET CLIENTSIDE" but not "CLIENTSIDE NET".
if(tk_Token == TK_CLIENTSIDE)
{
scriptFlags |= CLIENTSIDE_SCRIPT_FLAG;
TK_NextToken();
}
CountScript(scriptType);
PC_AddScript(scriptNumber, scriptType, scriptFlags, ScriptVarCount);
pc_LastAppendedCommand = PCD_NOP;
if(ProcessStatement(STMT_SCRIPT) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
if(pc_LastAppendedCommand != PCD_TERMINATE)
{
PC_AppendCmd(PCD_TERMINATE);
}
PC_SetScriptVarCount(scriptNumber, scriptType, ScriptVarCount, ScriptArrayCount, ScriptArraySize);
pa_ScriptCount++;
}
//==========================================================================
//
// OuterFunction
//
//==========================================================================
static void OuterFunction(void)
{
enum ImportModes importing;
boolean hasReturn;
symbolNode_t *sym;
int defLine;
MS_Message(MSG_DEBUG, "---- OuterFunction ----\n");
importing = ImportMode;
BreakIndex = 0;
CaseIndex = 0;
StatementLevel = 0;
ScriptVarCount = 0;
ScriptArrayCount = 0;
SY_FreeLocals();
TK_NextToken();
if(tk_Token != TK_STR && tk_Token != TK_INT &&
tk_Token != TK_VOID && tk_Token != TK_BOOL)
{
ERR_Error(ERR_BAD_RETURN_TYPE, YES);
tk_Token = TK_VOID;
}
hasReturn = tk_Token != TK_VOID;
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
sym = SY_FindGlobal(tk_String);
if(sym != NULL)
{
if(sym->type != SY_SCRIPTFUNC)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
SkipBraceBlock(0);
TK_NextToken();
return;
}
if(!sym->info.scriptFunc.predefined)
{
ERR_Error(ERR_FUNCTION_ALREADY_DEFINED, YES);
ERR_ErrorAt(sym->info.scriptFunc.sourceName, sym->info.scriptFunc.sourceLine);
ERR_Error(ERR_NONE, YES, "Previous definition was here.");
SkipBraceBlock(0);
TK_NextToken();
return;
}
if(sym->info.scriptFunc.hasReturnValue && !hasReturn)
{
ERR_Error(ERR_PREVIOUS_NOT_VOID, YES);
ERR_ErrorAt(sym->info.scriptFunc.sourceName, sym->info.scriptFunc.sourceLine);
ERR_Error(ERR_NONE, YES, "Previous use was here.");
}
}
else
{
sym = SY_InsertGlobal(tk_String, SY_SCRIPTFUNC);
if (importing == IMPORT_Importing)
{
sym->info.scriptFunc.address = 0;
sym->info.scriptFunc.predefined = NO;
}
else
{
sym->info.scriptFunc.address = pc_Address;
sym->info.scriptFunc.predefined = YES;
// only for consistency with other speculated functions and pretty logs
sym->info.scriptFunc.funcNumber = 0;
}
}
defLine = tk_Line;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
if(TK_NextToken() == TK_VOID)
{
TK_NextTokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
else
{
TK_Undo();
do
{
symbolType_t type;
symbolNode_t *local;
TK_NextToken();
/* if(tk_Token != TK_INT && tk_Token != TK_STR && tk_Token != TK_BOOL)
{
ERR_Error(ERR_BAD_VAR_TYPE, YES);
tk_Token = TK_INT;
}
*/ if(tk_Token == TK_INT || tk_Token == TK_BOOL)
{
if(TK_NextToken() == TK_LBRACKET)
{
TK_NextTokenMustBe(TK_RBRACKET, ERR_BAD_VAR_TYPE);
type = SY_SCRIPTALIAS;
}
else
{
TK_Undo();
type = SY_SCRIPTVAR;
}
}
else if(tk_Token == TK_STR)
{
type = SY_SCRIPTVAR;
}
else
{
type = SY_SCRIPTVAR;
ERR_Error(ERR_BAD_VAR_TYPE, YES);
tk_Token = TK_INT;
}
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
if(SY_FindLocal(tk_String) != NULL)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
}
else
{
local = SY_InsertLocal(tk_String, type);
local->info.var.index = ScriptVarCount;
ScriptVarCount++;
}
TK_NextToken();
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
if(pc_EnforceHexen)
{
ERR_Error(ERR_HEXEN_COMPAT, YES);
}
sym->info.scriptFunc.sourceLine = defLine;
sym->info.scriptFunc.sourceName = tk_SourceName;
sym->info.scriptFunc.argCount = ScriptVarCount;
sym->info.scriptFunc.address = (importing == IMPORT_Importing) ? 0 : pc_Address;
sym->info.scriptFunc.hasReturnValue = hasReturn;
if(importing == IMPORT_Importing)
{
SkipBraceBlock(0);
TK_NextToken();
sym->info.scriptFunc.predefined = NO;
sym->info.scriptFunc.varCount = ScriptVarCount;
return;
}
TK_NextToken();
InsideFunction = sym;
pc_LastAppendedCommand = PCD_NOP;
// If we just call ProcessStatement(STMT_SCRIPT), and this function
// needs to return a value but the last pcode output was not a return,
// then the line number given in the error can be confusing because it
// is beyond the end of the function. To avoid this, we process the
// compound statement ourself and check if it returned something
// before checking for the '}'. If a return is required, then the error
// line will be shown as the one that contains the '}' (if present).
TK_TokenMustBe(TK_LBRACE, ERR_MISSING_LBRACE);
TK_NextToken();
do {} while(ProcessStatement(STMT_SCRIPT) == YES);
if(pc_LastAppendedCommand != PCD_RETURNVOID &&
pc_LastAppendedCommand != PCD_RETURNVAL)
{
if(hasReturn)
{
TK_Undo();
ERR_Error(ERR_MUST_RETURN_A_VALUE, YES, NULL);
}
PC_AppendCmd(PCD_RETURNVOID);
}
TK_TokenMustBe(TK_RBRACE, ERR_INVALID_STATEMENT);
TK_NextToken();
sym->info.scriptFunc.predefined = NO;
sym->info.scriptFunc.varCount = ScriptVarCount -
sym->info.scriptFunc.argCount;
PC_AddFunction(sym, ScriptArrayCount, ScriptArraySize);
UnspeculateFunction(sym);
InsideFunction = NULL;
}
//==========================================================================
//
// OuterMapVar
//
//==========================================================================
static void OuterMapVar(boolean local)
{
symbolNode_t *sym = NULL;
int index;
MS_Message(MSG_DEBUG, "---- %s ----\n", local ? "LeadingStaticVarDeclare" : "OuterMapVar");
do
{
if(pa_MapVarCount >= MAX_MAP_VARIABLES)
{
ERR_Error(ERR_TOO_MANY_MAP_VARS, YES);
index = MAX_MAP_VARIABLES;
}
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
sym = local ? SY_FindLocal(tk_String)
: SY_FindGlobal(tk_String);
if(sym != NULL)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
index = MAX_MAP_VARIABLES;
}
else
{
sym = local ? SY_InsertLocal(tk_String, SY_MAPVAR)
: SY_InsertGlobal(tk_String, SY_MAPVAR);
if(ImportMode == IMPORT_Importing)
{
sym->info.var.index = index = 0;
}
else
{
sym->info.var.index = index = pa_MapVarCount;
if (!local)
{ // Local variables are not exported
PC_NameMapVariable(index, sym);
}
pa_MapVarCount++;
}
}
TK_NextToken();
if(tk_Token == TK_ASSIGN)
{
if(ImportMode != IMPORT_Importing)
{
TK_NextToken();
PC_PutMapVariable (index, EvalConstExpression());
}
else
{
// When importing, skip the initializer, because we don't care.
do
{
TK_NextToken();
} while(tk_Token != TK_COMMA && tk_Token != TK_SEMICOLON);
}
}
else if(tk_Token == TK_LBRACKET)
{
int size, ndim, dims[MAX_ARRAY_DIMS];
ParseArrayDims(&size, &ndim, dims);
if(sym != NULL)
{
if(ImportMode != IMPORT_Importing)
{
PC_AddArray(index, size);
}
SymToArray(SY_MAPARRAY, sym, index, size, ndim, dims);
if(tk_Token == TK_ASSIGN)
{
InitializeArray(sym, dims, size);
}
}
}
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// OuterWorldVar
//
//==========================================================================
static void OuterWorldVar(boolean isGlobal)
{
int index;
symbolNode_t *sym;
MS_Message(MSG_DEBUG, "---- Outer%sVar ----\n", isGlobal ? "Global" : "World");
if(TK_NextToken() != TK_INT)
{
if(tk_Token != TK_BOOL)
{
TK_TokenMustBe(TK_STR, ERR_BAD_VAR_TYPE);
}
}
do
{
TK_NextTokenMustBe(TK_NUMBER, ERR_MISSING_WVAR_INDEX);
if(tk_Number >= (isGlobal ? MAX_GLOBAL_VARIABLES : MAX_WORLD_VARIABLES))
{
ERR_Error(ERR_BAD_WVAR_INDEX+isGlobal, YES);
index = 0;
}
else
{
index = tk_Number;
}
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_WVAR_COLON+isGlobal);
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
if(SY_FindGlobal(tk_String) != NULL)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
}
else
{
TK_NextToken();
if(tk_Token == TK_LBRACKET)
{
TK_NextToken ();
if(tk_Token != TK_RBRACKET)
{
ERR_Error(ERR_NO_NEED_ARRAY_SIZE, YES);
TK_SkipPast(TK_RBRACKET);
}
else
{
TK_NextToken();
}
if(tk_Token == TK_LBRACKET)
{
ERR_Error(ERR_NO_MULTIDIMENSIONS, YES);
do
{
TK_SkipPast(TK_RBRACKET);
}
while(tk_Token == TK_LBRACKET);
}
sym = SY_InsertGlobal(tk_String, isGlobal ? SY_GLOBALARRAY : SY_WORLDARRAY);
sym->info.array.index = index;
sym->info.array.ndim = 1;
sym->info.array.size = 0x7fffffff; // not used
memset(sym->info.array.dimensions, 0, sizeof(sym->info.array.dimensions));
if (isGlobal)
pa_GlobalArrayCount++;
else
pa_WorldArrayCount++;
}
else
{
sym = SY_InsertGlobal(tk_String, isGlobal ? SY_GLOBALVAR : SY_WORLDVAR);
sym->info.var.index = index;
if (isGlobal)
pa_GlobalVarCount++;
else
pa_WorldVarCount++;
}
}
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// OuterSpecialDef
//
//==========================================================================
static void OuterSpecialDef(void)
{
int special;
symbolNode_t *sym;
MS_Message(MSG_DEBUG, "---- OuterSpecialDef ----\n");
if(ImportMode == IMPORT_Importing)
{
// No need to process special definitions when importing.
TK_SkipPast(TK_SEMICOLON);
}
else
{
do
{
if (TK_NextToken() == TK_MINUS)
{
TK_NextTokenMustBe(TK_NUMBER, ERR_MISSING_SPEC_VAL);
special = -tk_Number;
}
else
{
TK_TokenMustBe(TK_NUMBER, ERR_MISSING_SPEC_VAL);
special = tk_Number;
}
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_SPEC_COLON);
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
sym = SY_InsertGlobalUnique(tk_String, SY_SPECIAL);
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextTokenMustBe(TK_NUMBER, ERR_MISSING_SPEC_ARGC);
sym->info.special.value = special;
sym->info.special.argCount = tk_Number | (tk_Number << 16);
TK_NextToken();
if(tk_Token == TK_COMMA)
{ // Get maximum arg count
TK_NextTokenMustBe(TK_NUMBER, ERR_MISSING_SPEC_ARGC);
sym->info.special.argCount =
(sym->info.special.argCount & 0xffff) | (tk_Number << 16);
}
else
{
TK_Undo ();
}
TK_NextTokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextToken();
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
}
//==========================================================================
//
// OuterDefine
//
//==========================================================================
static void OuterDefine(boolean force)
{
int value;
symbolNode_t *sym;
MS_Message(MSG_DEBUG, "---- OuterDefine %s----\n",
force ? "(forced) " : "");
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
sym = SY_InsertGlobalUnique(tk_String, SY_CONSTANT);
// Defines inside an import are deleted when the import is popped.
if(ImportMode != IMPORT_Importing || force)
{
sym->info.constant.fileDepth = 0;
}
else
{
sym->info.constant.fileDepth = TK_GetDepth();
}
TK_NextToken();
value = EvalConstExpression();
MS_Message(MSG_DEBUG, "Constant value: %d\n", value);
sym->info.constant.value = value;
sym->info.constant.strValue = pa_ConstExprIsString ? strdup(STR_Get(value)) : NULL;
}
//==========================================================================
//
// OuterInclude
//
//==========================================================================
static void OuterInclude(void)
{
// Don't include inside an import
if(ImportMode != IMPORT_Importing)
{
MS_Message(MSG_DEBUG, "---- OuterInclude ----\n");
TK_NextTokenMustBe(TK_STRING, ERR_STRING_LIT_NOT_FOUND);
TK_Include(tk_String);
}
else
{
TK_NextToken();
}
TK_NextToken();
}
//==========================================================================
//
// OuterImport
//
//==========================================================================
static void OuterImport(void)
{
MS_Message(MSG_DEBUG, "---- OuterImport ----\n");
if(ImportMode == IMPORT_Importing)
{
// Don't import inside an import
TK_NextToken();
}
else
{
MS_Message(MSG_DEBUG, "Importing a file\n");
TK_NextTokenMustBe(TK_STRING, ERR_STRING_LIT_NOT_FOUND);
TK_Import(tk_String, ImportMode);
}
TK_NextToken();
}
//==========================================================================
//
// ProcessStatement
//
//==========================================================================
static boolean ProcessStatement(statement_t owner)
{
if(StatementIndex == MAX_STATEMENT_DEPTH)
{
ERR_Exit(ERR_STATEMENT_OVERFLOW, YES);
}
StatementHistory[StatementIndex++] = owner;
StatementLevel += AdjustStmtLevel[owner];
switch(tk_Token)
{
case TK_INT:
case TK_STR:
case TK_BOOL:
case TK_STATIC:
LeadingVarDeclare();
break;
case TK_LINESPECIAL:
if (tk_SpecialValue >= 0)
{
LeadingLineSpecial(NO);
}
else
{
LeadingFunction(NO);
}
break;
case TK_ACSEXECUTEWAIT:
if(InsideFunction)
{
ERR_Error(ERR_LATENT_IN_FUNC, YES);
}
tk_SpecialArgCount = 1 | (5<<16);
tk_SpecialValue = 80;
LeadingLineSpecial(YES);
break;
case TK_ACSNAMEDEXECUTEWAIT:
if(InsideFunction)
{
ERR_Error(ERR_LATENT_IN_FUNC, YES);
}
tk_SpecialArgCount = 1 | (5<<16);
tk_SpecialValue = -39;
LeadingFunction(YES);
break;
case TK_RESTART:
LeadingRestart();
break;
case TK_SUSPEND:
LeadingSuspend();
break;
case TK_TERMINATE:
LeadingTerminate();
break;
case TK_RETURN:
LeadingReturn();
break;
case TK_IDENTIFIER:
LeadingIdentifier();
break;
case TK_PRINT:
case TK_PRINTBOLD:
case TK_LOG:
LeadingPrint();
break;
case TK_STRPARAM_EVAL:
LeadingPrint();
PC_AppendCmd(PCD_DROP);
/* Duplicate code: LeadingPrint() post-processing: */
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
break;
case TK_STRCPY:
LeadingStrcpy();
PC_AppendCmd(PCD_DROP);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
break;
case TK_HUDMESSAGE:
case TK_HUDMESSAGEBOLD:
LeadingHudMessage();
break;
case TK_IF:
LeadingIf();
break;
case TK_FOR:
LeadingFor();
break;
case TK_WHILE:
case TK_UNTIL:
LeadingWhileUntil();
break;
case TK_DO:
LeadingDo();
break;
case TK_SWITCH:
LeadingSwitch();
break;
case TK_CASE:
if(owner != STMT_SWITCH)
{
ERR_Error(ERR_CASE_NOT_IN_SWITCH, YES);
TK_SkipPast(TK_COLON);
}
else
{
LeadingCase();
}
break;
case TK_DEFAULT:
if(owner != STMT_SWITCH)
{
ERR_Error(ERR_DEFAULT_NOT_IN_SWITCH, YES);
TK_SkipPast(TK_COLON);
}
else if(DefaultInCurrent() == YES)
{
ERR_Error(ERR_MULTIPLE_DEFAULT, YES);
TK_SkipPast(TK_COLON);
}
else
{
LeadingDefault();
}
break;
case TK_BREAK:
if(BreakAncestor() == NO)
{
ERR_Error(ERR_MISPLACED_BREAK, YES);
TK_SkipPast(TK_SEMICOLON);
}
else
{
LeadingBreak();
}
break;
case TK_CONTINUE:
if(ContinueAncestor() == NO)
{
ERR_Error(ERR_MISPLACED_CONTINUE, YES);
TK_SkipPast(TK_SEMICOLON);
}
else
{
LeadingContinue();
}
break;
case TK_CREATETRANSLATION:
LeadingCreateTranslation();
break;
case TK_LBRACE:
LeadingCompoundStatement(owner);
break;
case TK_SEMICOLON:
TK_NextToken();
break;
case TK_INC:
case TK_DEC:
LeadingIncDec(tk_Token);
break;
default:
StatementIndex--;
StatementLevel -= AdjustStmtLevel[owner];
return NO;
break;
}
StatementIndex--;
StatementLevel -= AdjustStmtLevel[owner];
return YES;
}
//==========================================================================
//
// LeadingCompoundStatement
//
//==========================================================================
static void LeadingCompoundStatement(statement_t owner)
{
//StatementLevel += AdjustStmtLevel[owner];
TK_NextToken(); // Eat the TK_LBRACE
do {} while(ProcessStatement(owner) == YES);
TK_TokenMustBe(TK_RBRACE, ERR_INVALID_STATEMENT);
TK_NextToken();
//StatementLevel -= AdjustStmtLevel[owner];
}
//==========================================================================
//
// LeadingVarDeclare
//
//==========================================================================
static void LeadingVarDeclare(void)
{
symbolNode_t *sym = NULL;
if(tk_Token == TK_STATIC)
{
TK_NextToken();
if(tk_Token != TK_INT && tk_Token != TK_STR && tk_Token != TK_BOOL)
{
ERR_Error(ERR_BAD_VAR_TYPE, YES);
TK_Undo();
}
OuterMapVar(YES);
return;
}
MS_Message(MSG_DEBUG, "---- LeadingVarDeclare ----\n");
do
{
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INVALID_IDENTIFIER);
#if 0
if(ScriptVarCount == MAX_SCRIPT_VARIABLES)
{
ERR_Error(InsideFunction
? ERR_TOO_MANY_FUNCTION_VARS
: ERR_TOO_MANY_SCRIPT_VARS,
YES, NULL);
ScriptVarCount++;
}
else
#endif
if(SY_FindLocal(tk_String) != NULL)
{ // Redefined
ERR_Error(ERR_REDEFINED_IDENTIFIER, YES, tk_String);
}
else
{
sym = SY_InsertLocal(tk_String, SY_SCRIPTVAR);
sym->info.var.index = ScriptVarCount;
ScriptVarCount++;
}
TK_NextToken();
if(tk_Token == TK_LBRACKET)
{
int size, ndim, dims[MAX_ARRAY_DIMS];
ParseArrayDims(&size, &ndim, dims);
if(sym != NULL)
{
ScriptVarCount--;
if(ScriptArrayCount == MAX_SCRIPT_ARRAYS)
{
ERR_Error(InsideFunction ? ERR_TOO_MANY_FUNCTION_ARRAYS : ERR_TOO_MANY_SCRIPT_ARRAYS, YES, NULL);
}
if(ScriptArrayCount < MAX_SCRIPT_ARRAYS)
{
ScriptArraySize[ScriptArrayCount] = size;
}
SymToArray(SY_SCRIPTARRAY, sym, ScriptArrayCount++, size, ndim, dims);
if(tk_Token == TK_ASSIGN)
{
InitializeScriptArray(sym, dims);
}
}
}
else if(tk_Token == TK_ASSIGN)
{
TK_NextToken();
EvalExpression();
if(sym != NULL)
{
PC_AppendCmd(PCD_ASSIGNSCRIPTVAR);
PC_AppendShrink(sym->info.var.index);
}
}
} while(tk_Token == TK_COMMA);
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// LeadingLineSpecial
//
//==========================================================================
static void LeadingLineSpecial(boolean executewait)
{
int i;
int argCount;
int argCountMin;
int argCountMax;
int argSave[8];
U_INT specialValue;
boolean direct;
MS_Message(MSG_DEBUG, "---- LeadingLineSpecial ----\n");
argCountMin = tk_SpecialArgCount & 0xffff;
argCountMax = tk_SpecialArgCount >> 16;
specialValue = tk_SpecialValue;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
i = 0;
if(argCountMax > 0)
{
if(TK_NextToken() == TK_CONST)
{
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
direct = YES;
}
else
{
TK_Undo();
direct = NO;
}
do
{
if(i == argCountMax)
{
ERR_Error(ERR_BAD_LSPEC_ARG_COUNT, YES);
i = argCountMax+1;
}
TK_NextToken();
if(direct == YES)
{
argSave[i] = EvalConstExpression();
}
else
{
EvalExpression();
if (i == 0 && executewait)
{
PC_AppendCmd(PCD_DUP);
}
}
if(i < argCountMax)
{
i++;
}
} while(tk_Token == TK_COMMA);
if(i < argCountMin)
{
ERR_Error(ERR_BAD_LSPEC_ARG_COUNT, YES);
TK_SkipPast(TK_SEMICOLON);
return;
}
argCount = i;
}
else
{
// [RH] I added some zero-argument specials without realizing that
// ACS won't allow for less than one, so fake them as one-argument
// specials with a parameter of 0.
argCount = 1;
direct = YES;
argSave[0] = 0;
TK_NextToken ();
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
if(direct == NO)
{
PC_AppendCmd(PCD_LSPEC1+(argCount-1));
if(pc_NoShrink)
{
PC_AppendInt(specialValue);
}
else
{
if (specialValue > 255)
{
ERR_Error(ERR_SPECIAL_RANGE, YES);
}
PC_AppendByte((U_BYTE)specialValue);
}
if(executewait)
{
PC_AppendCmd(PCD_SCRIPTWAIT);
}
}
else
{
boolean useintform;
if(pc_NoShrink)
{
PC_AppendCmd(PCD_LSPEC1DIRECT+(argCount-1));
PC_AppendInt(specialValue);
useintform = YES;
}
else
{
useintform = NO;
for (i = 0; i < argCount; i++)
{
if ((U_INT)argSave[i] > 255)
{
useintform = YES;
break;
}
}
PC_AppendCmd((argCount-1)+(useintform?PCD_LSPEC1DIRECT:PCD_LSPEC1DIRECTB));
PC_AppendByte((U_BYTE)specialValue);
}
if (useintform)
{
for (i = 0; i < argCount; i++)
{
PC_AppendInt(argSave[i]);
}
}
else
{
for (i = 0; i < argCount; i++)
{
PC_AppendByte((U_BYTE)argSave[i]);
}
}
if(executewait)
{
PC_AppendCmd(PCD_SCRIPTWAITDIRECT);
PC_AppendInt(argSave[0]);
}
}
TK_NextToken();
}
//==========================================================================
//
// LeadingFunction
//
//==========================================================================
static void LeadingFunction(boolean executewait)
{
int i;
int argCount;
int argCountMin;
int argCountMax;
int specialValue;
MS_Message(MSG_DEBUG, "---- LeadingFunction ----\n");
argCountMin = tk_SpecialArgCount & 0xffff;
argCountMax = tk_SpecialArgCount >> 16;
specialValue = -tk_SpecialValue;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
i = 0;
if(argCountMax > 0)
{
if(TK_NextToken() == TK_CONST)
{
// Just skip const declarators
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
}
else
{
TK_Undo();
}
do
{
if(i == argCountMax)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
i = argCountMax+1;
}
TK_NextToken();
EvalExpression();
if (i == 0 && executewait)
{
PC_AppendCmd(PCD_DUP);
}
if(i < argCountMax)
{
i++;
}
} while(tk_Token == TK_COMMA);
if(i < argCountMin)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
TK_SkipPast(TK_SEMICOLON);
return;
}
argCount = i;
}
else
{
argCount = 0;
TK_NextToken ();
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_CALLFUNC);
if(pc_NoShrink)
{
PC_AppendInt(argCount);
PC_AppendInt(specialValue);
}
else
{
PC_AppendByte((U_BYTE)argCount);
PC_AppendWord((U_WORD)specialValue);
}
PC_AppendCmd(PCD_DROP);
if(executewait)
{
PC_AppendCmd(PCD_SCRIPTWAITNAMED);
}
TK_NextToken();
}
//==========================================================================
//
// LeadingIdentifier
//
//==========================================================================
static void LeadingIdentifier(void)
{
symbolNode_t *sym;
sym = SpeculateSymbol(tk_String, NO);
switch(sym->type)
{
case SY_MAPARRAY:
case SY_SCRIPTVAR:
case SY_SCRIPTALIAS:
case SY_MAPVAR:
case SY_WORLDVAR:
case SY_GLOBALVAR:
case SY_SCRIPTARRAY:
case SY_WORLDARRAY:
case SY_GLOBALARRAY:
LeadingVarAssign(sym);
break;
case SY_INTERNFUNC:
LeadingInternFunc(sym);
break;
case SY_SCRIPTFUNC:
LeadingScriptFunc(sym);
break;
default:
break;
}
}
//==========================================================================
//
// LeadingInternFunc
//
//==========================================================================
static void LeadingInternFunc(symbolNode_t *sym)
{
if(InsideFunction && sym->info.internFunc.latent)
{
ERR_Error(ERR_LATENT_IN_FUNC, YES);
}
ProcessInternFunc(sym);
if(sym->info.internFunc.hasReturnValue == YES)
{
PC_AppendCmd(PCD_DROP);
}
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// ProcessInternFunc
//
//==========================================================================
static void ProcessInternFunc(symbolNode_t *sym)
{
int i;
int argCount;
int optMask;
int outMask;
boolean direct;
boolean specialDirect;
int argSave[8];
MS_Message(MSG_DEBUG, "---- ProcessInternFunc ----\n");
argCount = sym->info.internFunc.argCount;
optMask = sym->info.internFunc.optMask;
outMask = sym->info.internFunc.outMask;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
if(TK_NextToken() == TK_CONST)
{
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
if(sym->info.internFunc.directCommand == PCD_NOP)
{
ERR_Error(ERR_NO_DIRECT_VER, YES, NULL);
direct = NO;
specialDirect = NO;
}
else
{
direct = YES;
if (pc_NoShrink || argCount > 2 ||
(sym->info.internFunc.directCommand != PCD_DELAYDIRECT &&
sym->info.internFunc.directCommand != PCD_RANDOMDIRECT))
{
specialDirect = NO;
PC_AppendCmd(sym->info.internFunc.directCommand);
}
else
{
specialDirect = YES;
}
}
TK_NextToken();
}
else
{
direct = NO;
specialDirect = NO; // keep GCC quiet
}
i = 0;
if(argCount > 0)
{
if(tk_Token == TK_RPAREN)
{
ERR_Error(ERR_MISSING_PARAM, YES);
}
else
{
TK_Undo(); // Adjust for first expression
do
{
if(i == argCount)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
TK_SkipTo(TK_SEMICOLON);
TK_Undo();
return;
}
TK_NextToken();
if(direct == YES)
{
if (tk_Token != TK_COMMA)
{
if (specialDirect)
{
argSave[i] = EvalConstExpression();
}
else
{
PC_AppendInt(EvalConstExpression());
}
}
else
{
if (optMask & 1)
{
if (specialDirect)
{
argSave[i] = 0;
}
else
{
PC_AppendInt(0);
}
}
else
{
ERR_Error(ERR_MISSING_PARAM, YES);
}
}
}
else
{
if (tk_Token != TK_COMMA)
{
if (!(outMask & 1))
{
EvalExpression();
}
else if (tk_Token != TK_IDENTIFIER)
{
ERR_Error (ERR_PARM_MUST_BE_VAR, YES);
do
{
TK_NextToken();
} while (tk_Token != TK_COMMA && tk_Token != TK_RPAREN);
}
else
{
symbolNode_t *sym = DemandSymbol (tk_String);
PC_AppendCmd (PCD_PUSHNUMBER);
switch (sym->type)
{
case SY_SCRIPTVAR:
PC_AppendInt(sym->info.var.index | OUTVAR_SCRIPT_SPEC);
break;
case SY_MAPVAR:
PC_AppendInt(sym->info.var.index | OUTVAR_MAP_SPEC);
break;
case SY_WORLDVAR:
PC_AppendInt(sym->info.var.index | OUTVAR_WORLD_SPEC);
break;
case SY_GLOBALVAR:
PC_AppendInt(sym->info.var.index | OUTVAR_GLOBAL_SPEC);
break;
default:
ERR_Error (ERR_PARM_MUST_BE_VAR, YES);
do
{
TK_NextToken();
} while (tk_Token != TK_COMMA && tk_Token != TK_RPAREN);
break;
}
TK_NextToken ();
}
}
else
{
if (optMask & 1)
{
PC_AppendPushVal(0);
}
else
{
ERR_Error(ERR_MISSING_PARAM, YES);
}
}
}
i++;
optMask >>= 1;
outMask >>= 1;
} while(tk_Token == TK_COMMA);
}
}
while (i < argCount && (optMask & 1))
{
if (direct == YES)
{
if (specialDirect)
{
argSave[i] = 0;
}
else
{
PC_AppendInt(0);
}
}
else
{
PC_AppendPushVal(0);
}
i++;
optMask >>= 1;
}
if(i != argCount && i > 0)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
}
TK_TokenMustBe(TK_RPAREN, argCount > 0 ? ERR_MISSING_RPAREN : ERR_BAD_ARG_COUNT);
if(direct == NO)
{
PC_AppendCmd(sym->info.internFunc.stackCommand);
}
else if (specialDirect)
{
boolean useintform = NO;
pcd_t shortpcd;
switch (sym->info.internFunc.directCommand)
{
case PCD_DELAYDIRECT:
shortpcd = PCD_DELAYDIRECTB;
break;
case PCD_RANDOMDIRECT:
shortpcd = PCD_RANDOMDIRECTB;
break;
default:
useintform = YES;
shortpcd = PCD_NOP;
break;
}
if (!useintform)
{
for (i = 0; i < argCount; i++)
{
if ((U_INT)argSave[i] > 255)
{
useintform = YES;
break;
}
}
}
if (useintform)
{
PC_AppendCmd(sym->info.internFunc.directCommand);
for (i = 0; i < argCount; i++)
{
PC_AppendInt (argSave[i]);
}
}
else
{
PC_AppendCmd (shortpcd);
for (i = 0; i < argCount; i++)
{
PC_AppendByte ((U_BYTE)argSave[i]);
}
}
}
TK_NextToken();
}
//==========================================================================
//
// LeadingScriptFunc
//
//==========================================================================
static void LeadingScriptFunc(symbolNode_t *sym)
{
ProcessScriptFunc(sym, YES);
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// ProcessScriptFunc
//
//==========================================================================
static void ProcessScriptFunc(symbolNode_t *sym, boolean discardReturn)
{
int i;
int argCount;
MS_Message(MSG_DEBUG, "---- ProcessScriptFunc ----\n");
if(sym->info.scriptFunc.predefined == YES && discardReturn == NO)
{
sym->info.scriptFunc.hasReturnValue = YES;
}
argCount = sym->info.scriptFunc.argCount;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
i = 0;
if(argCount == 0)
{
TK_NextTokenMustBe(TK_RPAREN, ERR_BAD_ARG_COUNT);
}
else if(argCount > 0)
{
TK_NextToken();
if(tk_Token == TK_RPAREN)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
TK_SkipTo(TK_SEMICOLON);
return;
}
TK_Undo();
do
{
if(i == argCount)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
TK_SkipTo(TK_SEMICOLON);
return;
}
TK_NextToken();
if (tk_Token != TK_COMMA)
{
EvalExpression();
}
else
{
ERR_Error(ERR_MISSING_PARAM, YES);
TK_SkipTo(TK_SEMICOLON);
return;
}
i++;
} while(tk_Token == TK_COMMA);
}
if(argCount < 0)
{ // Function has not been defined yet, so assume arg count is correct
TK_NextToken();
while (tk_Token != TK_RPAREN)
{
EvalExpression();
i++;
if (tk_Token == TK_COMMA)
{
TK_NextToken();
}
else if (tk_Token != TK_RPAREN)
{
ERR_Error(ERR_MISSING_PARAM, YES);
TK_SkipTo(TK_SEMICOLON);
return;
}
}
}
else if(i != argCount)
{
ERR_Error(ERR_BAD_ARG_COUNT, YES);
TK_SkipTo(TK_SEMICOLON);
return;
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
PC_AppendCmd(discardReturn ? PCD_CALLDISCARD : PCD_CALL);
if(sym->info.scriptFunc.predefined && ImportMode != IMPORT_Importing)
{
AddScriptFuncRef(sym, pc_Address, i);
}
if (pc_NoShrink)
{
PC_AppendInt(sym->info.scriptFunc.funcNumber);
}
else
{
PC_AppendByte((U_BYTE)sym->info.scriptFunc.funcNumber);
}
TK_NextToken();
}
//==========================================================================
//
// BuildPrintString
//
//==========================================================================
static void BuildPrintString(void)
{
pcd_t printCmd;
do
{
switch(TK_NextCharacter())
{
case 'a': // character array support [JB]
ActionOnCharRange(NO);
continue;
case 's': // string
printCmd = PCD_PRINTSTRING;
break;
case 'l': // [RH] localized string
printCmd = PCD_PRINTLOCALIZED;
break;
case 'i': // integer
case 'd': // decimal
printCmd = PCD_PRINTNUMBER;
break;
case 'c': // character
printCmd = PCD_PRINTCHARACTER;
break;
case 'n': // [BC] name
printCmd = PCD_PRINTNAME;
break;
case 'f': // [RH] fixed point
printCmd = PCD_PRINTFIXED;
break;
case 'k': // [GRB] key binding
printCmd = PCD_PRINTBIND;
break;
case 'b': // [RH] binary integer
printCmd = PCD_PRINTBINARY;
break;
case 'x': // [RH] hexadecimal integer
printCmd = PCD_PRINTHEX;
break;
default:
printCmd = PCD_PRINTSTRING;
ERR_Error(ERR_UNKNOWN_PRTYPE, YES);
break;
}
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextToken();
EvalExpression();
PC_AppendCmd(printCmd);
} while(tk_Token == TK_COMMA);
}
//==========================================================================
//
// ActionOnCharRange // FDARI (mutation of PrintCharArray // JB)
//
//==========================================================================
static void ActionOnCharRange(boolean write)
{
boolean rangeConstraints;
symbolNode_t *sym;
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextToken();
if (tk_Token == TK_LPAREN)
{
rangeConstraints = YES;
TK_NextToken();
}
else
{
rangeConstraints = NO;
}
sym = SpeculateSymbol(tk_String, NO);
if((sym->type != SY_MAPARRAY) && (sym->type != SY_WORLDARRAY)
&& (sym->type != SY_GLOBALARRAY) && (sym->type != SY_SCRIPTARRAY))
{
ERR_Error(ERR_NOT_AN_ARRAY, YES, sym->name);
}
TK_NextToken();
if(sym->info.array.ndim > 1)
{
ParseArrayIndices(sym, sym->info.array.ndim-1);
}
else
{
PC_AppendPushVal(0);
}
PC_AppendPushVal(sym->info.array.index);
if (rangeConstraints)
{
switch (tk_Token)
{
case TK_RPAREN:
rangeConstraints = NO;
TK_NextToken();
break;
case TK_COMMA:
TK_NextToken();
EvalExpression();
switch (tk_Token)
{
case TK_RPAREN:
TK_NextToken();
PC_AppendPushVal(0x7FFFFFFF);
break;
case TK_COMMA:
TK_NextToken();
EvalExpression(); // limit on capacity
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextToken();
break;
default:
ERR_Error(ERR_MISSING_RPAREN, YES);
break;
}
break;
default:
ERR_Error(ERR_MISSING_RPAREN, YES);
break;
}
}
if (write)
{
if (!rangeConstraints)
{
PC_AppendPushVal(0);
PC_AppendPushVal(0x7FFFFFFF);
}
TK_TokenMustBe(TK_COMMA, ERR_MISSING_COMMA);
TK_NextToken();
EvalExpression();
if (tk_Token == TK_COMMA)
{
TK_NextToken();
EvalExpression();
}
else
{
PC_AppendPushVal(0);
}
}
if(sym->type == SY_SCRIPTARRAY)
{
if (write) PC_AppendCmd(PCD_STRCPYTOSCRIPTCHRANGE);
else PC_AppendCmd( rangeConstraints ? PCD_PRINTSCRIPTCHRANGE : PCD_PRINTSCRIPTCHARARRAY );
}
else if(sym->type == SY_MAPARRAY)
{
if (write) PC_AppendCmd(PCD_STRCPYTOMAPCHRANGE);
else PC_AppendCmd( rangeConstraints ? PCD_PRINTMAPCHRANGE : PCD_PRINTMAPCHARARRAY );
}
else if(sym->type == SY_WORLDARRAY)
{
if (write) PC_AppendCmd(PCD_STRCPYTOWORLDCHRANGE);
else PC_AppendCmd( rangeConstraints ? PCD_PRINTWORLDCHRANGE : PCD_PRINTWORLDCHARARRAY );
}
else // if(sym->type == SY_GLOBALARRAY)
{
if (write) PC_AppendCmd(PCD_STRCPYTOGLOBALCHRANGE);
else PC_AppendCmd( rangeConstraints ? PCD_PRINTGLOBALCHRANGE : PCD_PRINTGLOBALCHARARRAY );
}
}
//==========================================================================
//
// LeadingStrcpy
//
//==========================================================================
static void LeadingStrcpy(void)
{
MS_Message(MSG_DEBUG, "---- LeadingStrcpy ----\n");
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
switch(TK_NextCharacter()) // structure borrowed from printbuilder
{
case 'a':
ActionOnCharRange(YES);
break;
default:
ERR_Error(ERR_UNKNOWN_PRTYPE, YES);
break;
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
//==========================================================================
//
// LeadingPrint
//
//==========================================================================
static void LeadingPrint(void)
{
tokenType_t stmtToken;
MS_Message(MSG_DEBUG, "---- LeadingPrint ----\n");
stmtToken = tk_Token; // Will be TK_PRINT or TK_PRINTBOLD, TK_LOG or TK_STRPARAM_EVAL [FDARI]
PC_AppendCmd(PCD_BEGINPRINT);
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
BuildPrintString();
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
switch (stmtToken)
{
case TK_PRINT:
PC_AppendCmd(PCD_ENDPRINT);
break;
case TK_PRINTBOLD:
PC_AppendCmd(PCD_ENDPRINTBOLD);
break;
case TK_STRPARAM_EVAL:
PC_AppendCmd(PCD_SAVESTRING);
return; // THE CALLER MUST DO THE POST-PROCESSING
case TK_LOG:
default:
PC_AppendCmd(PCD_ENDLOG);
break;
}
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// LeadingHudMessage
//
// hudmessage(str text; int type, int id, int color, fixed x, fixed y, fixed holdtime, ...)
//
//==========================================================================
static void LeadingHudMessage(void)
{
tokenType_t stmtToken;
int i;
MS_Message(MSG_DEBUG, "---- LeadingHudMessage ----\n");
stmtToken = tk_Token; // Will be TK_HUDMESSAGE or TK_HUDMESSAGEBOLD
PC_AppendCmd(PCD_BEGINPRINT);
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
BuildPrintString();
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_PARAM);
PC_AppendCmd(PCD_MOREHUDMESSAGE);
for (i = 6; i > 0; i--)
{
TK_NextToken();
EvalExpression();
if (i > 1)
TK_TokenMustBe(TK_COMMA, ERR_MISSING_PARAM);
}
if (tk_Token == TK_COMMA)
{ // HUD message has optional parameters
PC_AppendCmd(PCD_OPTHUDMESSAGE);
do
{
TK_NextToken();
EvalExpression();
} while (tk_Token == TK_COMMA);
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
PC_AppendCmd(stmtToken == TK_HUDMESSAGE ?
PCD_ENDHUDMESSAGE : PCD_ENDHUDMESSAGEBOLD);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// LeadingCreateTranslation
//
// Simple grammar:
//
// tranlationstmt: CreateTranslation ( exp opt_args ) ;
// opt_args: /* empty: just reset the translation */ | , arglist
// arglist: arg | arglist arg
// arg: range = replacement
// range: exp : exp
// replacement: palrep | colorrep
// palrep: exp : exp
// colorrep: [exp,exp,exp]:[exp,exp,exp]
// desatrep: %colorrep
//==========================================================================
static void LeadingCreateTranslation(void)
{
MS_Message(MSG_DEBUG, "---- LeadingCreateTranslation ----\n");
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextToken();
EvalExpression();
PC_AppendCmd(PCD_STARTTRANSLATION);
while (tk_Token == TK_COMMA)
{
pcd_t translationcode;
TK_NextToken();
EvalExpression(); // Get first palette entry in range
TK_TokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextToken();
EvalExpression(); // Get second palette entry in range
TK_TokenMustBe(TK_ASSIGN, ERR_MISSING_ASSIGN);
TK_NextToken();
if(tk_Token == TK_PERCENT)
{
translationcode = PCD_TRANSLATIONRANGE3;
TK_NextTokenMustBe(TK_LBRACKET, ERR_MISSING_LBRACKET);
}
else
{
translationcode = PCD_TRANSLATIONRANGE2;
}
if(tk_Token == TK_LBRACKET)
{ // Replacement is color range
int i, j;
TK_NextToken();
for(j = 2; j != 0; --j)
{
for(i = 3; i != 0; --i)
{
EvalExpression();
if(i != 1)
{
TK_TokenMustBe(TK_COMMA, ERR_MISSING_COMMA);
}
else
{
TK_TokenMustBe(TK_RBRACKET, ERR_MISSING_RBRACKET);
}
TK_NextToken();
}
if(j == 2)
{
TK_TokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextTokenMustBe(TK_LBRACKET, ERR_MISSING_LBRACKET);
TK_NextToken();
}
}
}
else
{ // Replacement is palette range
EvalExpression();
TK_TokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextToken();
EvalExpression();
translationcode = PCD_TRANSLATIONRANGE1;
}
PC_AppendCmd(translationcode);
}
PC_AppendCmd(PCD_ENDTRANSLATION);
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
}
//==========================================================================
//
// LeadingIf
//
//==========================================================================
static void LeadingIf(void)
{
int jumpAddrPtr1;
int jumpAddrPtr2;
MS_Message(MSG_DEBUG, "---- LeadingIf ----\n");
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextToken();
EvalExpression();
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
PC_AppendCmd(PCD_IFNOTGOTO);
jumpAddrPtr1 = pc_Address;
PC_SkipInt();
TK_NextToken();
if(ProcessStatement(STMT_IF) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
if(tk_Token == TK_ELSE)
{
PC_AppendCmd(PCD_GOTO);
jumpAddrPtr2 = pc_Address;
PC_SkipInt();
PC_WriteInt(pc_Address, jumpAddrPtr1);
TK_NextToken();
if(ProcessStatement(STMT_ELSE) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
PC_WriteInt(pc_Address, jumpAddrPtr2);
}
else
{
PC_WriteInt(pc_Address, jumpAddrPtr1);
}
}
//==========================================================================
//
// LeadingFor
//
//==========================================================================
static void LeadingFor(void)
{
int exprAddr;
int incAddr;
int ifgotoAddr;
int gotoAddr;
MS_Message(MSG_DEBUG, "---- LeadingFor ----\n");
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextToken();
if(ProcessStatement(STMT_IF) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
exprAddr = pc_Address;
EvalExpression();
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
PC_AppendCmd(PCD_IFGOTO);
ifgotoAddr = pc_Address;
PC_SkipInt();
PC_AppendCmd(PCD_GOTO);
gotoAddr = pc_Address;
PC_SkipInt();
incAddr = pc_Address;
forSemicolonHack = TRUE;
if(ProcessStatement(STMT_IF) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
forSemicolonHack = FALSE;
PC_AppendCmd(PCD_GOTO);
PC_AppendInt(exprAddr);
PC_WriteInt(pc_Address,ifgotoAddr);
if(ProcessStatement(STMT_FOR) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
PC_AppendCmd(PCD_GOTO);
PC_AppendInt(incAddr);
WriteContinues(incAddr);
WriteBreaks();
PC_WriteInt(pc_Address,gotoAddr);
}
//==========================================================================
//
// LeadingWhileUntil
//
//==========================================================================
static void LeadingWhileUntil(void)
{
tokenType_t stmtToken;
int topAddr;
int outAddrPtr;
MS_Message(MSG_DEBUG, "---- LeadingWhileUntil ----\n");
stmtToken = tk_Token;
topAddr = pc_Address;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextToken();
EvalExpression();
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
PC_AppendCmd(stmtToken == TK_WHILE ? PCD_IFNOTGOTO : PCD_IFGOTO);
outAddrPtr = pc_Address;
PC_SkipInt();
TK_NextToken();
if(ProcessStatement(STMT_WHILEUNTIL) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES);
}
PC_AppendCmd(PCD_GOTO);
PC_AppendInt(topAddr);
PC_WriteInt(pc_Address, outAddrPtr);
WriteContinues(topAddr);
WriteBreaks();
}
//==========================================================================
//
// LeadingDo
//
//==========================================================================
static void LeadingDo(void)
{
int topAddr;
int exprAddr;
tokenType_t stmtToken;
MS_Message(MSG_DEBUG, "---- LeadingDo ----\n");
topAddr = pc_Address;
TK_NextToken();
if(ProcessStatement(STMT_DO) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES, NULL);
}
if(tk_Token != TK_WHILE && tk_Token != TK_UNTIL)
{
ERR_Error(ERR_BAD_DO_STATEMENT, YES, NULL);
TK_SkipPast(TK_SEMICOLON);
return;
}
stmtToken = tk_Token;
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
exprAddr = pc_Address;
TK_NextToken();
EvalExpression();
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(stmtToken == TK_WHILE ? PCD_IFGOTO : PCD_IFNOTGOTO);
PC_AppendInt(topAddr);
WriteContinues(exprAddr);
WriteBreaks();
TK_NextToken();
}
//==========================================================================
//
// LeadingSwitch
//
//==========================================================================
static void LeadingSwitch(void)
{
int switcherAddrPtr;
int outAddrPtr;
caseInfo_t *cInfo;
int defaultAddress;
MS_Message(MSG_DEBUG, "---- LeadingSwitch ----\n");
TK_NextTokenMustBe(TK_LPAREN, ERR_MISSING_LPAREN);
TK_NextToken();
EvalExpression();
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
PC_AppendCmd(PCD_GOTO);
switcherAddrPtr = pc_Address;
PC_SkipInt();
TK_NextToken();
if(ProcessStatement(STMT_SWITCH) == NO)
{
ERR_Error(ERR_INVALID_STATEMENT, YES, NULL);
}
PC_AppendCmd(PCD_GOTO);
outAddrPtr = pc_Address;
PC_SkipInt();
PC_WriteInt(pc_Address, switcherAddrPtr);
defaultAddress = 0;
if(pc_HexenCase)
{
while((cInfo = GetCaseInfo()) != NULL)
{
if(cInfo->isDefault == YES)
{
defaultAddress = cInfo->address;
continue;
}
PC_AppendCmd(PCD_CASEGOTO);
PC_AppendInt(cInfo->value);
PC_AppendInt(cInfo->address);
}
}
else if(CaseIndex != 0)
{
caseInfo_t *maxCase = &CaseInfo[CaseIndex];
caseInfo_t *minCase = maxCase;
// [RH] Sort cases so that the VM can handle them with
// a quick binary search.
while((cInfo = GetCaseInfo()) != NULL)
{
minCase = cInfo;
}
qsort(minCase, maxCase - minCase, sizeof(caseInfo_t), CaseInfoCmp);
if(minCase->isDefault == YES)
{
defaultAddress = minCase->address;
minCase++;
}
if (minCase < maxCase)
{
PC_AppendCmd(PCD_CASEGOTOSORTED);
if(pc_Address%4 != 0)
{ // Align to a 4-byte boundary
U_INT pad = 0;
PC_Append((void *)&pad, 4-(pc_Address%4));
}
PC_AppendInt(maxCase - minCase);
for(; minCase < maxCase; ++minCase)
{
PC_AppendInt(minCase->value);
PC_AppendInt(minCase->address);
}
}
}
PC_AppendCmd(PCD_DROP);
if(defaultAddress != 0)
{
PC_AppendCmd(PCD_GOTO);
PC_AppendInt(defaultAddress);
}
PC_WriteInt(pc_Address, outAddrPtr);
WriteBreaks();
}
//==========================================================================
//
// LeadingCase
//
//==========================================================================
static void LeadingCase(void)
{
MS_Message(MSG_DEBUG, "---- LeadingCase ----\n");
TK_NextToken();
PushCase(EvalConstExpression(), NO);
TK_TokenMustBe(TK_COLON, ERR_MISSING_COLON);
TK_NextToken();
}
//==========================================================================
//
// LeadingDefault
//
//==========================================================================
static void LeadingDefault(void)
{
MS_Message(MSG_DEBUG, "---- LeadingDefault ----\n");
TK_NextTokenMustBe(TK_COLON, ERR_MISSING_COLON);
PushCase(0, YES);
TK_NextToken();
}
//==========================================================================
//
// PushCase
//
//==========================================================================
static void PushCase(int value, boolean isDefault)
{
if(CaseIndex == MAX_CASE)
{
ERR_Exit(ERR_CASE_OVERFLOW, YES);
}
CaseInfo[CaseIndex].level = StatementLevel;
CaseInfo[CaseIndex].value = value;
CaseInfo[CaseIndex].isDefault = isDefault;
CaseInfo[CaseIndex].address = pc_Address;
CaseIndex++;
}
//==========================================================================
//
// GetCaseInfo
//
//==========================================================================
static caseInfo_t *GetCaseInfo(void)
{
if(CaseIndex == 0)
{
return NULL;
}
if(CaseInfo[CaseIndex-1].level > StatementLevel)
{
return &CaseInfo[--CaseIndex];
}
return NULL;
}
//==========================================================================
//
// CaseInfoCmp
//
//==========================================================================
static int CaseInfoCmp (const void *a, const void *b)
{
const caseInfo_t *ca = (const caseInfo_t *)a;
const caseInfo_t *cb = (const caseInfo_t *)b;
// The default case always gets moved to the front.
if(ca->isDefault)
{
return -1;
}
if(cb->isDefault)
{
return 1;
}
return ca->value - cb->value;
}
//==========================================================================
//
// DefaultInCurrent
//
//==========================================================================
static boolean DefaultInCurrent(void)
{
int i;
for(i = 0; i < CaseIndex; i++)
{
if(CaseInfo[i].isDefault == YES
&& CaseInfo[i].level == StatementLevel)
{
return YES;
}
}
return NO;
}
//==========================================================================
//
// LeadingBreak
//
//==========================================================================
static void LeadingBreak(void)
{
MS_Message(MSG_DEBUG, "---- LeadingBreak ----\n");
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_GOTO);
PushBreak();
PC_SkipInt();
TK_NextToken();
}
//==========================================================================
//
// PushBreak
//
//==========================================================================
static void PushBreak(void)
{
if(BreakIndex == MAX_CASE)
{
ERR_Exit(ERR_BREAK_OVERFLOW, YES);
}
BreakInfo[BreakIndex].level = StatementLevel;
BreakInfo[BreakIndex].addressPtr = pc_Address;
BreakIndex++;
}
//==========================================================================
//
// WriteBreaks
//
//==========================================================================
static void WriteBreaks(void)
{
while(BreakIndex && BreakInfo[BreakIndex-1].level > StatementLevel)
{
PC_WriteInt(pc_Address, BreakInfo[--BreakIndex].addressPtr);
}
}
//==========================================================================
//
// BreakAncestor
//
// Returns YES if the current statement history contains a break root
// statement.
//
//==========================================================================
static boolean BreakAncestor(void)
{
int i;
for(i = 0; i < StatementIndex; i++)
{
if(IsBreakRoot[StatementHistory[i]])
{
return YES;
}
}
return NO;
}
//==========================================================================
//
// LeadingContinue
//
//==========================================================================
static void LeadingContinue(void)
{
MS_Message(MSG_DEBUG, "---- LeadingContinue ----\n");
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_GOTO);
PushContinue();
PC_SkipInt();
TK_NextToken();
}
//==========================================================================
//
// PushContinue
//
//==========================================================================
static void PushContinue(void)
{
if(ContinueIndex == MAX_CONTINUE)
{
ERR_Exit(ERR_CONTINUE_OVERFLOW, YES);
}
ContinueInfo[ContinueIndex].level = StatementLevel;
ContinueInfo[ContinueIndex].addressPtr = pc_Address;
ContinueIndex++;
}
//==========================================================================
//
// WriteContinues
//
//==========================================================================
static void WriteContinues(int address)
{
if(ContinueIndex == 0)
{
return;
}
while(ContinueInfo[ContinueIndex-1].level > StatementLevel)
{
PC_WriteInt(address, ContinueInfo[--ContinueIndex].addressPtr);
}
}
//==========================================================================
//
// ContinueAncestor
//
//==========================================================================
static boolean ContinueAncestor(void)
{
int i;
for(i = 0; i < StatementIndex; i++)
{
if(IsContinueRoot[StatementHistory[i]])
{
return YES;
}
}
return NO;
}
//==========================================================================
//
// LeadingIncDec
//
//==========================================================================
static void LeadingIncDec(int token)
{
symbolNode_t *sym;
MS_Message(MSG_DEBUG, "---- LeadingIncDec ----\n");
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INCDEC_OP_ON_NON_VAR);
sym = DemandSymbol(tk_String);
if(sym->type != SY_SCRIPTVAR && sym->type != SY_MAPVAR
&& sym->type != SY_WORLDVAR && sym->type != SY_GLOBALVAR
&& sym->type != SY_MAPARRAY && sym->type != SY_GLOBALARRAY
&& sym->type != SY_WORLDARRAY && sym->type != SY_SCRIPTALIAS
&& sym->type != SY_SCRIPTARRAY)
{
ERR_Error(ERR_INCDEC_OP_ON_NON_VAR, YES);
TK_SkipPast(TK_SEMICOLON);
return;
}
TK_NextToken();
if(sym->type == SY_MAPARRAY || sym->type == SY_WORLDARRAY
|| sym->type == SY_GLOBALARRAY || sym->type == SY_SCRIPTARRAY)
{
ParseArrayIndices(sym, sym->info.array.ndim);
}
else if(tk_Token == TK_LBRACKET)
{
ERR_Error(ERR_NOT_AN_ARRAY, YES, sym->name);
while(tk_Token == TK_LBRACKET)
{
TK_SkipPast(TK_RBRACKET);
}
}
PC_AppendCmd(GetIncDecPCD(token, sym->type));
PC_AppendShrink(sym->info.var.index);
if(forSemicolonHack)
{
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
}
else
{
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
}
TK_NextToken();
}
//==========================================================================
//
// LeadingVarAssign
//
//==========================================================================
static void LeadingVarAssign(symbolNode_t *sym)
{
boolean done;
tokenType_t assignToken;
MS_Message(MSG_DEBUG, "---- LeadingVarAssign ----\n");
done = NO;
do
{
TK_NextToken(); // Fetch assignment operator
if(sym->type == SY_MAPARRAY || sym->type == SY_WORLDARRAY
|| sym->type == SY_GLOBALARRAY || sym->type == SY_SCRIPTARRAY)
{
ParseArrayIndices(sym, sym->info.array.ndim);
}
else if(tk_Token == TK_LBRACKET)
{
ERR_Error(ERR_NOT_AN_ARRAY, YES, sym->name);
while(tk_Token == TK_LBRACKET)
{
TK_SkipPast(TK_RBRACKET);
}
}
if(tk_Token == TK_INC || tk_Token == TK_DEC)
{ // Postfix increment or decrement
PC_AppendCmd(GetIncDecPCD(tk_Token, sym->type));
if (pc_NoShrink)
{
PC_AppendInt(sym->info.var.index);
}
else
{
PC_AppendByte(sym->info.var.index);
}
TK_NextToken();
}
else
{ // Normal operator
if(TK_Member(AssignOps) == NO)
{
ERR_Error(ERR_MISSING_ASSIGN_OP, YES);
TK_SkipPast(TK_SEMICOLON);
return;
}
assignToken = tk_Token;
TK_NextToken();
EvalExpression();
PC_AppendCmd(GetAssignPCD(assignToken, sym->type));
PC_AppendShrink(sym->info.var.index);
}
if(tk_Token == TK_COMMA)
{
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_BAD_ASSIGNMENT);
sym = DemandSymbol(tk_String);
if(sym->type != SY_SCRIPTVAR && sym->type != SY_MAPVAR
&& sym->type != SY_WORLDVAR && sym->type != SY_GLOBALVAR
&& sym->type != SY_WORLDARRAY && sym->type != SY_GLOBALARRAY
&& sym->type != SY_SCRIPTALIAS)
{
ERR_Error(ERR_BAD_ASSIGNMENT, YES);
TK_SkipPast(TK_SEMICOLON);
return;
}
}
else
{
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
TK_NextToken();
done = YES;
}
} while(done == NO);
}
//==========================================================================
//
// GetAssignPCD
//
//==========================================================================
static pcd_t GetAssignPCD(tokenType_t token, symbolType_t symbol)
{
size_t i, j;
static tokenType_t tokenLookup[] =
{
TK_ASSIGN, TK_ADDASSIGN, TK_SUBASSIGN,
TK_MULASSIGN, TK_DIVASSIGN, TK_MODASSIGN,
TK_ANDASSIGN, TK_EORASSIGN, TK_ORASSIGN,
TK_LSASSIGN, TK_RSASSIGN
};
static symbolType_t symbolLookup[] =
{
SY_SCRIPTVAR, SY_MAPVAR, SY_WORLDVAR, SY_GLOBALVAR, SY_MAPARRAY,
SY_WORLDARRAY, SY_GLOBALARRAY, SY_SCRIPTARRAY
};
static pcd_t assignmentLookup[11][8] =
{
{ PCD_ASSIGNSCRIPTVAR, PCD_ASSIGNMAPVAR, PCD_ASSIGNWORLDVAR, PCD_ASSIGNGLOBALVAR, PCD_ASSIGNMAPARRAY, PCD_ASSIGNWORLDARRAY, PCD_ASSIGNGLOBALARRAY, PCD_ASSIGNSCRIPTARRAY },
{ PCD_ADDSCRIPTVAR, PCD_ADDMAPVAR, PCD_ADDWORLDVAR, PCD_ADDGLOBALVAR, PCD_ADDMAPARRAY, PCD_ADDWORLDARRAY, PCD_ADDGLOBALARRAY, PCD_ADDSCRIPTARRAY },
{ PCD_SUBSCRIPTVAR, PCD_SUBMAPVAR, PCD_SUBWORLDVAR, PCD_SUBGLOBALVAR, PCD_SUBMAPARRAY, PCD_SUBWORLDARRAY, PCD_SUBGLOBALARRAY, PCD_SUBSCRIPTARRAY },
{ PCD_MULSCRIPTVAR, PCD_MULMAPVAR, PCD_MULWORLDVAR, PCD_MULGLOBALVAR, PCD_MULMAPARRAY, PCD_MULWORLDARRAY, PCD_MULGLOBALARRAY, PCD_MULSCRIPTARRAY },
{ PCD_DIVSCRIPTVAR, PCD_DIVMAPVAR, PCD_DIVWORLDVAR, PCD_DIVGLOBALVAR, PCD_DIVMAPARRAY, PCD_DIVWORLDARRAY, PCD_DIVGLOBALARRAY, PCD_DIVSCRIPTARRAY },
{ PCD_MODSCRIPTVAR, PCD_MODMAPVAR, PCD_MODWORLDVAR, PCD_MODGLOBALVAR, PCD_MODMAPARRAY, PCD_MODWORLDARRAY, PCD_MODGLOBALARRAY, PCD_MODSCRIPTARRAY },
{ PCD_ANDSCRIPTVAR, PCD_ANDMAPVAR, PCD_ANDWORLDVAR, PCD_ANDGLOBALVAR, PCD_ANDMAPARRAY, PCD_ANDWORLDARRAY, PCD_ANDGLOBALARRAY, PCD_ANDSCRIPTARRAY },
{ PCD_EORSCRIPTVAR, PCD_EORMAPVAR, PCD_EORWORLDVAR, PCD_EORGLOBALVAR, PCD_EORMAPARRAY, PCD_EORWORLDARRAY, PCD_EORGLOBALARRAY, PCD_EORSCRIPTARRAY },
{ PCD_ORSCRIPTVAR, PCD_ORMAPVAR, PCD_ORWORLDVAR, PCD_ORGLOBALVAR, PCD_ORMAPARRAY, PCD_ORWORLDARRAY, PCD_ORGLOBALARRAY, PCD_ORSCRIPTARRAY },
{ PCD_LSSCRIPTVAR, PCD_LSMAPVAR, PCD_LSWORLDVAR, PCD_LSGLOBALVAR, PCD_LSMAPARRAY, PCD_LSWORLDARRAY, PCD_LSGLOBALARRAY, PCD_LSSCRIPTARRAY },
{ PCD_RSSCRIPTVAR, PCD_RSMAPVAR, PCD_RSWORLDVAR, PCD_RSGLOBALVAR, PCD_RSMAPARRAY, PCD_RSWORLDARRAY, PCD_RSGLOBALARRAY, PCD_RSSCRIPTARRAY }
};
for(i = 0; i < ARRAY_SIZE(tokenLookup); ++i)
{
if(tokenLookup[i] == token)
{
for(j = 0; j < ARRAY_SIZE(symbolLookup); ++j)
{
if (symbolLookup[j] == symbol)
{
return assignmentLookup[i][j];
}
}
break;
}
}
return PCD_NOP;
}
//==========================================================================
//
// LeadingSuspend
//
//==========================================================================
static void LeadingSuspend(void)
{
MS_Message(MSG_DEBUG, "---- LeadingSuspend ----\n");
if(InsideFunction)
{
ERR_Error(ERR_SUSPEND_IN_FUNCTION, YES);
}
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_SUSPEND);
TK_NextToken();
}
//==========================================================================
//
// LeadingTerminate
//
//==========================================================================
static void LeadingTerminate(void)
{
MS_Message(MSG_DEBUG, "---- LeadingTerminate ----\n");
if(InsideFunction)
{
ERR_Error(ERR_TERMINATE_IN_FUNCTION, YES);
}
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_TERMINATE);
TK_NextToken();
}
//==========================================================================
//
// LeadingRestart
//
//==========================================================================
static void LeadingRestart(void)
{
MS_Message(MSG_DEBUG, "---- LeadingRestart ----\n");
if(InsideFunction)
{
ERR_Error(ERR_RESTART_IN_FUNCTION, YES);
}
TK_NextTokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_RESTART);
TK_NextToken();
}
//==========================================================================
//
// LeadingReturn
//
//==========================================================================
static void LeadingReturn(void)
{
MS_Message(MSG_DEBUG, "---- LeadingReturn ----\n");
if(!InsideFunction)
{
ERR_Error(ERR_RETURN_OUTSIDE_FUNCTION, YES);
while (TK_NextToken () != TK_SEMICOLON)
{
if (tk_Token == TK_EOF)
break;
}
}
else
{
TK_NextToken();
if(tk_Token == TK_SEMICOLON)
{
if(InsideFunction->info.scriptFunc.hasReturnValue)
{
ERR_Error(ERR_MUST_RETURN_A_VALUE, YES);
}
PC_AppendCmd(PCD_RETURNVOID);
}
else
{
if(!InsideFunction->info.scriptFunc.hasReturnValue)
{
ERR_Error(ERR_MUST_NOT_RETURN_A_VALUE, YES);
}
EvalExpression();
TK_TokenMustBe(TK_SEMICOLON, ERR_MISSING_SEMICOLON);
PC_AppendCmd(PCD_RETURNVAL);
}
TK_NextToken();
}
}
//==========================================================================
//
// EvalConstExpression
//
//==========================================================================
static int EvalConstExpression(void)
{
pa_ConstExprIsString = NO; // Used by PC_PutMapVariable
ExprStackIndex = 0;
ConstantExpression = YES;
ExprLevA();
if(ExprStackIndex != 1)
{
ERR_Error(ERR_BAD_CONST_EXPR, YES, NULL);
ExprStack[0] = 0;
ExprStackIndex = 1;
}
return PopExStk();
}
//==========================================================================
//
// EvalExpression
//
// [RH] Rewrote all the ExprLevA - ExprLevJ functions in favor of a single
// table-driven parser function.
//
//==========================================================================
static void EvalExpression(void)
{
ConstantExpression = NO;
ExprLevA();
}
static void ExprLevA(void)
{
ExprLevX(0);
}
// Operator precedence levels:
// Operator: ||
// Operator: &&
// Operator: |
// Operator: ^
// Operator: &
// Operators: == !=
// Operators: < <= > >=
// Operators: << >>
// Operators: + -
// Operators: * / %
static void ExprLevX(int level)
{
if(OpsList[level] == NULL)
{
boolean unaryMinus;
unaryMinus = FALSE;
if(tk_Token == TK_MINUS)
{
unaryMinus = TRUE;
TK_NextToken();
}
if(tk_Token == TK_PLUS)
{
// Completely ignore unary plus
TK_NextToken();
}
if(ConstantExpression == YES)
{
ConstExprFactor();
}
else
{
ExprFactor();
}
if(unaryMinus == TRUE)
{
SendExprCommand(PCD_UNARYMINUS);
}
}
else
{
ExprLevX(level + 1);
while(TK_Member(OpsList[level]))
{
tokenType_t token = tk_Token;
TK_NextToken();
ExprLevX(level + 1);
SendExprCommand(TokenToPCD(token));
}
}
}
static void ExprLineSpecial(void)
{
int argCountMin = tk_SpecialArgCount & 0xffff;
int argCountMax = tk_SpecialArgCount >> 16;
int specialValue = tk_SpecialValue;
// There are two ways to use a special in an expression:
// 1. The special name by itself returns the special's number.
// 2. The special followed by parameters actually executes the special.
TK_NextToken();
if(tk_Token != TK_LPAREN)
{
PC_AppendPushVal(specialValue);
}
else
{
int argCount = 0;
TK_NextToken();
if(tk_Token != TK_RPAREN)
{
TK_Undo();
do
{
TK_NextToken();
EvalExpression();
argCount++;
} while(tk_Token == TK_COMMA);
}
if(argCount < argCountMin || argCount > argCountMax)
{
ERR_Error(specialValue >=0? ERR_BAD_LSPEC_ARG_COUNT : ERR_BAD_ARG_COUNT, YES);
return;
}
if (specialValue >= 0)
{
for(; argCount < 5; ++argCount)
{
PC_AppendPushVal(0);
}
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextToken();
PC_AppendCmd(PCD_LSPEC5RESULT);
if(pc_NoShrink)
{
PC_AppendInt(specialValue);
}
else
{
PC_AppendByte((U_BYTE)specialValue);
}
}
else
{
TK_TokenMustBe(TK_RPAREN, ERR_MISSING_RPAREN);
TK_NextToken();
PC_AppendCmd(PCD_CALLFUNC);
if(pc_NoShrink)
{
PC_AppendInt(argCount);
PC_AppendInt(-specialValue);
}
else
{
PC_AppendByte((U_BYTE)argCount);
PC_AppendWord((U_WORD)-specialValue);
}
}
}
}
static void ExprFactor(void)
{
symbolNode_t *sym;
tokenType_t opToken;
switch(tk_Token)
{
case TK_STRING:
if (ImportMode != IMPORT_Importing)
{
tk_Number = STR_Find(tk_String);
PC_AppendPushVal(tk_Number);
if (ImportMode == IMPORT_Exporting)
{
// The VM identifies strings by storing a library ID in the
// high word of the string index. The library ID is not
// known until the script actually gets loaded into the game,
// so we need to use this p-code to tack the ID of the
// currently running library to the index of the string that
// just got pushed onto the stack.
//
// Simply assuming that a string is from the current library
// is not good enough, because they can be passed around
// between libraries and the map's behavior. Thus, we need
// to know which object file a particular string belongs to.
//
// A specific example:
// A map's behavior calls a function in a library and passes
// a string:
//
// LibFunc ("The library will do something with this string.");
//
// The library function needs to know that the string originated
// outside the library. Similarly, if a library function returns
// a string, the caller needs to know that the string did not
// originate from the same object file.
//
// And that's why strings have library IDs tacked onto them.
// The map's main behavior (i.e. an object that is not a library)
// always uses library ID 0 to identify its strings, so its
// strings don't need to be tagged.
PC_AppendCmd(PCD_TAGSTRING);
}
}
TK_NextToken();
break;
case TK_NUMBER:
PC_AppendPushVal(tk_Number);
TK_NextToken();
break;
case TK_LPAREN:
TK_NextToken();
ExprLevA();
if(tk_Token != TK_RPAREN)
{
ERR_Error(ERR_BAD_EXPR, YES, NULL);
TK_SkipPast(TK_RPAREN);
}
else
{
TK_NextToken();
}
break;
case TK_NOT:
TK_NextToken();
ExprFactor();
PC_AppendCmd(PCD_NEGATELOGICAL);
break;
case TK_TILDE:
TK_NextToken();
ExprFactor();
PC_AppendCmd(PCD_NEGATEBINARY);
break;
case TK_INC:
case TK_DEC:
opToken = tk_Token;
TK_NextTokenMustBe(TK_IDENTIFIER, ERR_INCDEC_OP_ON_NON_VAR);
sym = DemandSymbol(tk_String);
if(sym->type != SY_SCRIPTVAR && sym->type != SY_MAPVAR
&& sym->type != SY_WORLDVAR && sym->type != SY_GLOBALVAR
&& sym->type != SY_MAPARRAY && sym->type != SY_WORLDARRAY
&& sym->type != SY_GLOBALARRAY && sym->type != SY_SCRIPTARRAY)
{
ERR_Error(ERR_INCDEC_OP_ON_NON_VAR, YES);
}
else
{
TK_NextToken();
if(sym->type == SY_MAPARRAY || sym->type == SY_WORLDARRAY
|| sym->type == SY_GLOBALARRAY || sym->type == SY_SCRIPTARRAY)
{
ParseArrayIndices(sym, sym->info.array.ndim);
PC_AppendCmd(PCD_DUP);
}
else if(tk_Token == TK_LBRACKET)
{
ERR_Error(ERR_NOT_AN_ARRAY, YES, sym->name);
while(tk_Token == TK_LBRACKET)
{
TK_SkipPast(TK_RBRACKET);
}
}
PC_AppendCmd(GetIncDecPCD(opToken, sym->type));
PC_AppendShrink(sym->info.var.index);
PC_AppendCmd(GetPushVarPCD(sym->type));
PC_AppendShrink(sym->info.var.index);
}
break;
case TK_IDENTIFIER:
sym = SpeculateSymbol(tk_String, YES);
switch(sym->type)
{
case SY_SCRIPTALIAS:
// FIXME
break;
case SY_SCRIPTARRAY:
case SY_MAPARRAY:
case SY_WORLDARRAY:
case SY_GLOBALARRAY:
TK_NextToken();
ParseArrayIndices(sym, sym->info.array.ndim);
// fallthrough
case SY_SCRIPTVAR:
case SY_MAPVAR:
case SY_WORLDVAR:
case SY_GLOBALVAR:
if(sym->type != SY_MAPARRAY && sym->type != SY_WORLDARRAY
&& sym->type != SY_GLOBALARRAY && sym->type != SY_SCRIPTARRAY)
{
TK_NextToken();
if(tk_Token == TK_LBRACKET)
{
ERR_Error(ERR_NOT_AN_ARRAY, YES, sym->name);
while(tk_Token == TK_LBRACKET)
{
TK_SkipPast(TK_RBRACKET);
}
}
}
if((tk_Token == TK_INC || tk_Token == TK_DEC)
&& (sym->type == SY_MAPARRAY || sym->type == SY_WORLDARRAY
|| sym->type == SY_GLOBALARRAY || sym->type == SY_SCRIPTARRAY))
{
PC_AppendCmd(PCD_DUP);
}
PC_AppendCmd(GetPushVarPCD(sym->type));
PC_AppendShrink(sym->info.var.index);
if(tk_Token == TK_INC || tk_Token == TK_DEC)
{
if(sym->type == SY_MAPARRAY || sym->type == SY_WORLDARRAY
|| sym->type == SY_GLOBALARRAY || sym->type == SY_SCRIPTARRAY)
{
PC_AppendCmd(PCD_SWAP);
}
PC_AppendCmd(GetIncDecPCD(tk_Token, sym->type));
PC_AppendShrink(sym->info.var.index);
TK_NextToken();
}
break;
case SY_INTERNFUNC:
if(sym->info.internFunc.hasReturnValue == NO)
{
ERR_Error(ERR_EXPR_FUNC_NO_RET_VAL, YES);
}
ProcessInternFunc(sym);
break;
case SY_SCRIPTFUNC:
if(sym->info.scriptFunc.predefined == NO
&& sym->info.scriptFunc.hasReturnValue == NO)
{
ERR_Error(ERR_EXPR_FUNC_NO_RET_VAL, YES);
}
ProcessScriptFunc(sym, NO);
break;
default:
ERR_Error(ERR_ILLEGAL_EXPR_IDENT, YES, tk_String);
TK_NextToken();
break;
}
break;
case TK_LINESPECIAL:
ExprLineSpecial();
break;
case TK_STRPARAM_EVAL:
LeadingPrint();
TK_NextToken();
break;
case TK_STRCPY:
LeadingStrcpy();
TK_NextToken();
break;
default:
ERR_Error(ERR_BAD_EXPR, YES);
TK_NextToken();
break;
}
}
static void ConstExprFactor(void)
{
switch(tk_Token)
{
case TK_STRING:
if (ImportMode != IMPORT_Importing)
{
int strnum = STR_Find(tk_String);
if (ImportMode == IMPORT_Exporting)
{
pa_ConstExprIsString = YES;
}
PushExStk(strnum);
}
else
{
// Importing, so it doesn't matter
PushExStk(0);
}
TK_NextToken();
break;
case TK_NUMBER:
PushExStk(tk_Number);
TK_NextToken();
break;
case TK_LPAREN:
TK_NextToken();
ExprLevA();
if(tk_Token != TK_RPAREN)
{
ERR_Error(ERR_BAD_CONST_EXPR, YES);
TK_SkipPast(TK_RPAREN);
}
else
{
TK_NextToken();
}
break;
case TK_NOT:
TK_NextToken();
ConstExprFactor();
SendExprCommand(PCD_NEGATELOGICAL);
break;
case TK_TILDE:
TK_NextToken();
ConstExprFactor();
SendExprCommand(PCD_NEGATEBINARY);
break;
default:
ERR_Error(ERR_BAD_CONST_EXPR, YES);
PushExStk(0);
while(tk_Token != TK_COMMA &&
tk_Token != TK_SEMICOLON &&
tk_Token != TK_RPAREN)
{
if(tk_Token == TK_EOF)
{
ERR_Exit(ERR_EOF, YES);
}
TK_NextToken();
}
break;
}
}
//==========================================================================
//
// SendExprCommand
//
//==========================================================================
static void SendExprCommand(pcd_t pcd)
{
int operand1, operand2;
if(ConstantExpression == NO)
{
PC_AppendCmd(pcd);
return;
}
switch(pcd)
{
case PCD_ADD:
PushExStk(PopExStk()+PopExStk());
break;
case PCD_SUBTRACT:
operand2 = PopExStk();
PushExStk(PopExStk()-operand2);
break;
case PCD_MULTIPLY:
PushExStk(PopExStk()*PopExStk());
break;
case PCD_DIVIDE:
case PCD_MODULUS:
operand2 = PopExStk();
operand1 = PopExStk();
if (operand2 != 0)
{
PushExStk(pcd == PCD_DIVIDE ? operand1/operand2 : operand1%operand2);
}
else
{
ERR_Error(ERR_DIV_BY_ZERO_IN_CONST_EXPR, YES);
PushExStk(operand1);
}
break;
case PCD_EQ:
PushExStk(PopExStk() == PopExStk());
break;
case PCD_NE:
PushExStk(PopExStk() != PopExStk());
break;
case PCD_LT:
operand2 = PopExStk();
PushExStk(PopExStk() < operand2);
break;
case PCD_GT:
operand2 = PopExStk();
PushExStk(PopExStk() > operand2);
break;
case PCD_LE:
operand2 = PopExStk();
PushExStk(PopExStk() <= operand2);
break;
case PCD_GE:
operand2 = PopExStk();
PushExStk(PopExStk() >= operand2);
break;
case PCD_ANDLOGICAL:
operand2 = PopExStk();
operand1 = PopExStk();
PushExStk(operand1 && operand2);
break;
case PCD_ORLOGICAL:
operand2 = PopExStk();
operand1 = PopExStk();
PushExStk(operand1 || operand2);
break;
case PCD_ANDBITWISE:
PushExStk(PopExStk()&PopExStk());
break;
case PCD_ORBITWISE:
PushExStk(PopExStk()|PopExStk());
break;
case PCD_EORBITWISE:
PushExStk(PopExStk()^PopExStk());
break;
case PCD_NEGATELOGICAL:
PushExStk(!PopExStk());
break;
case PCD_NEGATEBINARY:
PushExStk(~PopExStk());
break;
case PCD_LSHIFT:
operand2 = PopExStk();
PushExStk(PopExStk()<<operand2);
break;
case PCD_RSHIFT:
operand2 = PopExStk();
PushExStk(PopExStk()>>operand2);
break;
case PCD_UNARYMINUS:
PushExStk(-PopExStk());
break;
default:
ERR_Exit(ERR_UNKNOWN_CONST_EXPR_PCD, YES);
break;
}
}
//==========================================================================
//
// PushExStk
//
//==========================================================================
static void PushExStk(int value)
{
if(ExprStackIndex == EXPR_STACK_DEPTH)
{
ERR_Exit(ERR_EXPR_STACK_OVERFLOW, YES);
}
ExprStack[ExprStackIndex++] = value;
}
//==========================================================================
//
// PopExStk
//
//==========================================================================
static int PopExStk(void)
{
if(ExprStackIndex < 1)
{
ERR_Error(ERR_EXPR_STACK_EMPTY, YES);
return 0;
}
return ExprStack[--ExprStackIndex];
}
//==========================================================================
//
// TokenToPCD
//
//==========================================================================
static pcd_t TokenToPCD(tokenType_t token)
{
int i;
static struct
{
tokenType_t token;
pcd_t pcd;
} operatorLookup[] =
{
{ TK_ORLOGICAL, PCD_ORLOGICAL },
{ TK_ANDLOGICAL, PCD_ANDLOGICAL },
{ TK_ORBITWISE, PCD_ORBITWISE },
{ TK_EORBITWISE, PCD_EORBITWISE },
{ TK_ANDBITWISE, PCD_ANDBITWISE },
{ TK_EQ, PCD_EQ },
{ TK_NE, PCD_NE },
{ TK_LT, PCD_LT },
{ TK_LE, PCD_LE },
{ TK_GT, PCD_GT },
{ TK_GE, PCD_GE },
{ TK_LSHIFT, PCD_LSHIFT },
{ TK_RSHIFT, PCD_RSHIFT },
{ TK_PLUS, PCD_ADD },
{ TK_MINUS, PCD_SUBTRACT },
{ TK_ASTERISK, PCD_MULTIPLY },
{ TK_SLASH, PCD_DIVIDE },
{ TK_PERCENT, PCD_MODULUS },
{ TK_NONE, PCD_NOP }
};
for(i = 0; operatorLookup[i].token != TK_NONE; i++)
{
if(operatorLookup[i].token == token)
{
return operatorLookup[i].pcd;
}
}
return PCD_NOP;
}
//==========================================================================
//
// GetPushVarPCD
//
//==========================================================================
static pcd_t GetPushVarPCD(symbolType_t symType)
{
switch(symType)
{
case SY_SCRIPTVAR:
return PCD_PUSHSCRIPTVAR;
case SY_MAPVAR:
return PCD_PUSHMAPVAR;
case SY_WORLDVAR:
return PCD_PUSHWORLDVAR;
case SY_GLOBALVAR:
return PCD_PUSHGLOBALVAR;
case SY_SCRIPTARRAY:
return PCD_PUSHSCRIPTARRAY;
case SY_MAPARRAY:
return PCD_PUSHMAPARRAY;
case SY_WORLDARRAY:
return PCD_PUSHWORLDARRAY;
case SY_GLOBALARRAY:
return PCD_PUSHGLOBALARRAY;
default:
break;
}
return PCD_NOP;
}
//==========================================================================
//
// GetIncDecPCD
//
//==========================================================================
static pcd_t GetIncDecPCD(tokenType_t token, symbolType_t symbol)
{
int i;
static struct
{
tokenType_t token;
symbolType_t symbol;
pcd_t pcd;
} incDecLookup[] =
{
{ TK_INC, SY_SCRIPTVAR, PCD_INCSCRIPTVAR },
{ TK_INC, SY_MAPVAR, PCD_INCMAPVAR },
{ TK_INC, SY_WORLDVAR, PCD_INCWORLDVAR },
{ TK_INC, SY_GLOBALVAR, PCD_INCGLOBALVAR },
{ TK_INC, SY_SCRIPTARRAY, PCD_INCSCRIPTARRAY },
{ TK_INC, SY_MAPARRAY, PCD_INCMAPARRAY },
{ TK_INC, SY_WORLDARRAY, PCD_INCWORLDARRAY },
{ TK_INC, SY_GLOBALARRAY, PCD_INCGLOBALARRAY },
{ TK_DEC, SY_SCRIPTVAR, PCD_DECSCRIPTVAR },
{ TK_DEC, SY_MAPVAR, PCD_DECMAPVAR },
{ TK_DEC, SY_WORLDVAR, PCD_DECWORLDVAR },
{ TK_DEC, SY_GLOBALVAR, PCD_DECGLOBALVAR },
{ TK_DEC, SY_SCRIPTARRAY, PCD_DECSCRIPTARRAY },
{ TK_DEC, SY_MAPARRAY, PCD_DECMAPARRAY },
{ TK_DEC, SY_WORLDARRAY, PCD_DECWORLDARRAY },
{ TK_DEC, SY_GLOBALARRAY, PCD_DECGLOBALARRAY },
{ TK_NONE, SY_DUMMY, PCD_NOP }
};
for(i = 0; incDecLookup[i].token != TK_NONE; i++)
{
if(incDecLookup[i].token == token
&& incDecLookup[i].symbol == symbol)
{
return incDecLookup[i].pcd;
}
}
return PCD_NOP;
}
//==========================================================================
//
// ParseArrayDims
//
//==========================================================================
static void ParseArrayDims(int *size_p, int *ndim_p, int dims[MAX_ARRAY_DIMS])
{
int size = 0;
int ndim = 0;
memset(dims, 0, MAX_ARRAY_DIMS*sizeof(dims[0]));
while(tk_Token == TK_LBRACKET)
{
if(ndim == MAX_ARRAY_DIMS)
{
ERR_Error(ERR_TOO_MANY_ARRAY_DIMS, YES);
do
{
TK_NextToken();
} while(tk_Token != TK_COMMA && tk_Token != TK_SEMICOLON);
break;
}
TK_NextToken();
if (tk_Token == TK_RBRACKET)
{
ERR_Error(ERR_NEED_ARRAY_SIZE, YES);
}
else
{
dims[ndim] = EvalConstExpression();
if(dims[ndim] == 0)
{
ERR_Error(ERR_ZERO_DIMENSION, YES);
dims[ndim] = 1;
}
if(ndim == 0)
{
size = dims[ndim];
}
else
{
size *= dims[ndim];
}
}
ndim++;
TK_TokenMustBe(TK_RBRACKET, ERR_MISSING_RBRACKET);
TK_NextToken();
}
if(pc_EnforceHexen)
{
TK_Undo(); // backup so error pointer is on last bracket instead of following token
ERR_Error(ERR_HEXEN_COMPAT, YES);
TK_NextToken();
}
*size_p = size;
*ndim_p = ndim;
}
static void SymToArray(int symtype, symbolNode_t *sym, int index, int size, int ndim, int dims[MAX_ARRAY_DIMS])
{
int i;
MS_Message(MSG_DEBUG, "%s changed to an array of size %d\n", sym->name, size);
sym->type = symtype;
sym->info.array.index = index;
sym->info.array.ndim = ndim;
sym->info.array.size = size;
if(ndim > 0)
{
sym->info.array.dimensions[ndim-1] = 1;
for(i = ndim - 2; i >= 0; --i)
{
sym->info.array.dimensions[i] =
sym->info.array.dimensions[i+1] * dims[i+1];
}
}
MS_Message(MSG_DEBUG, " - with multipliers ");
for(i = 0; i < ndim; ++i)
{
MS_Message(MSG_DEBUG, "[%d]", sym->info.array.dimensions[i]);
}
MS_Message(MSG_DEBUG, "\n");
}
//==========================================================================
//
// ParseArrayIndices
//
//==========================================================================
static void ParseArrayIndices(symbolNode_t *sym, int requiredIndices)
{
boolean warned = NO;
int i;
if(requiredIndices > 0)
{
TK_TokenMustBe(TK_LBRACKET, ERR_MISSING_LBRACKET);
}
i = 0;
while(tk_Token == TK_LBRACKET)
{
TK_NextToken();
if(((sym->type == SY_MAPARRAY || sym->type == SY_SCRIPTARRAY) && i == requiredIndices) ||
(sym->type != SY_MAPARRAY && sym->type != SY_SCRIPTARRAY && i > 0))
{
if (!warned)
{
warned = YES;
if(sym->info.array.ndim == requiredIndices)
{
ERR_Error(ERR_TOO_MANY_DIM_USED, YES,
sym->name, sym->info.array.ndim);
}
else
{
ERR_Error(ERR_NOT_A_CHAR_ARRAY, YES, sym->name,
sym->info.array.ndim, requiredIndices);
}
}
}
EvalExpression();
if(i < sym->info.array.ndim - 1 && sym->info.array.dimensions[i] > 1)
{
PC_AppendPushVal(sym->info.array.dimensions[i]);
PC_AppendCmd(PCD_MULTIPLY);
}
if(i > 0)
{
PC_AppendCmd(PCD_ADD);
}
i++;
TK_TokenMustBe(TK_RBRACKET, ERR_MISSING_RBRACKET);
TK_NextToken();
}
if(i < requiredIndices)
{
ERR_Error(ERR_TOO_FEW_DIM_USED, YES,
sym->name, requiredIndices - i);
}
// if there were unspecified indices, multiply the offset by their sizes [JB]
if(requiredIndices < sym->info.array.ndim - 1)
{
int i, mult = 1;
for(i = 0; i < sym->info.array.ndim - requiredIndices - 1; ++i)
{
mult *= sym->info.array.dimensions[sym->info.array.ndim - 2 - i];
}
if(mult > 1)
{
PC_AppendPushVal(mult);
PC_AppendCmd(PCD_MULTIPLY);
}
}
}
//==========================================================================
//
// ProcessArrayLevel
//
//==========================================================================
static void ProcessArrayLevel(int level, int *entry, int ndim,
int dims[MAX_ARRAY_DIMS], int muls[MAX_ARRAY_DIMS], char *name)
{
int warned_too_many = NO;
int i;
for(i = 0; ; ++i)
{
if(tk_Token == TK_COMMA)
{
entry += muls[level-1];
TK_NextToken();
}
else if(tk_Token == TK_RBRACE)
{
TK_NextToken();
return;
}
else
{
if(level == ndim)
{
if(tk_Token == TK_LBRACE)
{
ERR_Error(ERR_TOO_MANY_DIM_USED, YES, name, ndim);
SkipBraceBlock(0);
TK_NextToken();
entry++;
}
else
{
int val;
if (i >= dims[level - 1] && !warned_too_many)
{
warned_too_many = YES;
ERR_Error(ERR_TOO_MANY_ARRAY_INIT, YES);
}
val = EvalConstExpression();
ArrayHasStrings |= pa_ConstExprIsString;
if (i < dims[level - 1])
{
entry[i] = val;
}
}
}
else
{
//Bugfix for r3226 by Zom-B
if (i >= dims[level - 1])
{
if (!warned_too_many)
{
warned_too_many = YES;
ERR_Error(ERR_TOO_MANY_ARRAY_INIT, YES);
}
// Allow execution to continue without stray memory access
entry -= muls[level-1];
}
TK_TokenMustBe(TK_LBRACE, ERR_MISSING_LBRACE_ARR);
TK_NextToken();
ProcessArrayLevel(level+1, entry, ndim, dims, muls, name);
assert(level > 0);
entry += muls[level-1];
}
if(i < dims[level-1]-1)
{
if(tk_Token != TK_RBRACE)
{
TK_TokenMustBe(TK_COMMA, ERR_MISSING_COMMA);
TK_NextToken();
}
}
else
{
if(tk_Token != TK_COMMA)
{
TK_TokenMustBe(TK_RBRACE, ERR_MISSING_RBRACE_ARR);
}
else
{
TK_NextToken();
}
}
}
}
TK_TokenMustBe(TK_RBRACE, ERR_MISSING_RBRACE_ARR);
TK_NextToken();
}
//==========================================================================
//
// InitializeArray
//
//==========================================================================
static void InitializeArray(symbolNode_t *sym, int dims[MAX_ARRAY_DIMS], int size)
{
static int *entries = NULL;
static int lastsize = -1;
if(lastsize < size)
{
entries = MS_Realloc(entries, sizeof(int)*size, ERR_OUT_OF_MEMORY);
lastsize = size;
}
memset(entries, 0, sizeof(int)*size);
TK_NextTokenMustBe(TK_LBRACE, ERR_MISSING_LBRACE_ARR);
TK_NextToken();
ArrayHasStrings = NO;
ProcessArrayLevel(1, entries, sym->info.array.ndim, dims,
sym->info.array.dimensions, sym->name);
if(ImportMode != IMPORT_Importing)
{
PC_InitArray(sym->info.array.index, entries, ArrayHasStrings);
}
}
//==========================================================================
//
// ProcessScriptArrayLevel
//
//==========================================================================
static void ProcessScriptArrayLevel(int level, int loc, symbolNode_t *sym, int ndim,
int dims[MAX_ARRAY_DIMS], int muls[MAX_ARRAY_DIMS], char *name)
{
int warned_too_many = NO;
int i;
for(i = 0; ; ++i)
{
if(tk_Token == TK_COMMA)
{
loc += muls[level-1];
TK_NextToken();
}
else if(tk_Token == TK_RBRACE)
{
TK_NextToken();
return;
}
else
{
if(level == ndim)
{
if(tk_Token == TK_LBRACE)
{
ERR_Error(ERR_TOO_MANY_DIM_USED, YES, name, ndim);
SkipBraceBlock(0);
TK_NextToken();
loc++;
}
else
{
if(i >= dims[level - 1] && !warned_too_many)
{
warned_too_many = YES;
ERR_Error(ERR_TOO_MANY_ARRAY_INIT, YES);
}
PC_AppendPushVal(loc + i);
EvalExpression();
PC_AppendCmd(PCD_ASSIGNSCRIPTARRAY);
PC_AppendShrink(sym->info.array.index);
}
}
else
{
//Bugfix for r3226 by Zom-B
if (i >= dims[level - 1])
{
if (!warned_too_many)
{
warned_too_many = YES;
ERR_Error(ERR_TOO_MANY_ARRAY_INIT, YES);
}
}
TK_TokenMustBe(TK_LBRACE, ERR_MISSING_LBRACE_ARR);
TK_NextToken();
ProcessScriptArrayLevel(level+1, loc, sym, ndim, dims, muls, name);
assert(level > 0);
loc += muls[level-1];
}
if(i < dims[level-1]-1)
{
if(tk_Token != TK_RBRACE)
{
TK_TokenMustBe(TK_COMMA, ERR_MISSING_COMMA);
TK_NextToken();
}
}
else
{
if(tk_Token != TK_COMMA)
{
TK_TokenMustBe(TK_RBRACE, ERR_MISSING_RBRACE_ARR);
}
else
{
TK_NextToken();
}
}
}
}
TK_TokenMustBe(TK_RBRACE, ERR_MISSING_RBRACE_ARR);
TK_NextToken();
}
//==========================================================================
//
// InitializeScriptArray
//
//==========================================================================
static void InitializeScriptArray(symbolNode_t *sym, int dims[MAX_ARRAY_DIMS])
{
TK_NextTokenMustBe(TK_LBRACE, ERR_MISSING_LBRACE_ARR);
TK_NextToken();
ArrayHasStrings = NO;
ProcessScriptArrayLevel(1, 0, sym, sym->info.array.ndim, dims,
sym->info.array.dimensions, sym->name);
}
//==========================================================================
//
// DemandSymbol
//
//==========================================================================
static symbolNode_t *DemandSymbol(char *name)
{
symbolNode_t *sym;
if((sym = SY_Find(name)) == NULL)
{
ERR_Exit(ERR_UNKNOWN_IDENTIFIER, YES, name);
}
return sym;
}
//==========================================================================
//
// SpeculateSymbol
//
//==========================================================================
static symbolNode_t *SpeculateSymbol(char *name, boolean hasReturn)
{
symbolNode_t *sym;
sym = SY_Find(name);
if(sym == NULL)
{
char name[MAX_IDENTIFIER_LENGTH];
strcpy (name, tk_String);
TK_NextToken();
if(tk_Token == TK_LPAREN)
{ // Looks like a function call
sym = SpeculateFunction(name, hasReturn);
TK_Undo();
}
else
{
ERR_Exit(ERR_UNKNOWN_IDENTIFIER, YES, name);
}
}
return sym;
}
//==========================================================================
//
// SpeculateFunction
//
// Add a temporary symbol for a function that is used before it is defined.
//
//==========================================================================
static symbolNode_t *SpeculateFunction(const char *name, boolean hasReturn)
{
symbolNode_t *sym;
MS_Message(MSG_DEBUG, "---- SpeculateFunction %s ----\n", name);
sym = SY_InsertGlobal(tk_String, SY_SCRIPTFUNC);
sym->info.scriptFunc.predefined = YES;
sym->info.scriptFunc.hasReturnValue = hasReturn;
sym->info.scriptFunc.sourceLine = tk_Line;
sym->info.scriptFunc.sourceName = tk_SourceName;
sym->info.scriptFunc.argCount = -1;
sym->info.scriptFunc.funcNumber = 0;
return sym;
}
//==========================================================================
//
// UnspeculateFunction
//
// Fills in function calls that were made before this function was defined.
//
//==========================================================================
static void UnspeculateFunction(symbolNode_t *sym)
{
prefunc_t *fillin;
prefunc_t **prev;
prev = &FillinFunctions;
fillin = FillinFunctions;
while(fillin != NULL)
{
prefunc_t *next = fillin->next;
if(fillin->sym == sym)
{
if(fillin->argcount != sym->info.scriptFunc.argCount)
{
ERR_ErrorAt(fillin->source, fillin->line);
ERR_Error(ERR_FUNC_ARGUMENT_COUNT, YES, sym->name,
sym->info.scriptFunc.argCount,
sym->info.scriptFunc.argCount == 1 ? "" : "s");
}
if(pc_NoShrink)
{
PC_WriteInt(sym->info.scriptFunc.funcNumber, fillin->address);
}
else
{
PC_WriteByte((U_BYTE)sym->info.scriptFunc.funcNumber, fillin->address);
}
if(FillinFunctionsLatest == &fillin->next)
{
FillinFunctionsLatest = prev;
}
free (fillin);
*prev = next;
}
else
{
prev = &fillin->next;
}
fillin = next;
}
}
//==========================================================================
//
// AddScriptFuncRef
//
//==========================================================================
static void AddScriptFuncRef(symbolNode_t *sym, int address, int argcount)
{
prefunc_t *fillin = MS_Alloc(sizeof(*fillin), ERR_OUT_OF_MEMORY);
fillin->next = NULL;
fillin->sym = sym;
fillin->address = address;
fillin->argcount = argcount;
fillin->line = tk_Line;
fillin->source = tk_SourceName;
*FillinFunctionsLatest = fillin;
FillinFunctionsLatest = &fillin->next;
}
//==========================================================================
//
// Check for undefined functions
//
//==========================================================================
static void CheckForUndefinedFunctions(void)
{
prefunc_t *fillin = FillinFunctions;
while(fillin != NULL)
{
ERR_ErrorAt(fillin->source, fillin->line);
ERR_Error(ERR_UNDEFINED_FUNC, YES, fillin->sym->name);
fillin = fillin->next;
}
}
//==========================================================================
//
// SkipBraceBlock
//
// If depth is 0, it scans for the first { and then starts going from there.
// At exit, the terminating } is left as the current token.
//
//==========================================================================
void SkipBraceBlock(int depth)
{
if (depth == 0)
{
// Find first {
while(tk_Token != TK_LBRACE)
{
if(tk_Token == TK_EOF)
{
ERR_Exit(ERR_EOF, NO);
}
TK_NextToken();
}
depth = 1;
}
// Match it with a }
do
{
TK_NextToken();
if(tk_Token == TK_EOF)
{
ERR_Exit(ERR_EOF, NO);
}
else if (tk_Token == TK_LBRACE)
{
depth++;
}
else if (tk_Token == TK_RBRACE)
{
depth--;
}
} while (depth > 0);
}
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