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token.c
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token.c
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//**************************************************************************
//**
//** token.c
//**
//**************************************************************************
// HEADER FILES ------------------------------------------------------------
#if defined(_WIN32) && !defined(_MSC_VER)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#ifdef __NeXT__
#include <libc.h>
#else
#if !defined(unix) && !defined(__APPLE__)
#include <io.h>
#endif
#include <limits.h>
#include <fcntl.h>
#include <stdlib.h>
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "common.h"
#include "token.h"
#include "error.h"
#include "misc.h"
#include "symbol.h"
#include "parse.h"
// MACROS ------------------------------------------------------------------
#define NON_HEX_DIGIT 255
#define MAX_NESTED_SOURCES 16
// TYPES -------------------------------------------------------------------
typedef enum
{
CHR_EOF,
CHR_LETTER,
CHR_NUMBER,
CHR_QUOTE,
CHR_SPECIAL
} chr_t;
typedef struct
{
char *name;
char *start;
char *end;
char *position;
int line;
boolean incLineNumber;
boolean imported;
enum ImportModes prevMode;
char lastChar;
} nestInfo_t;
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
static int SortKeywords(const void *a, const void *b);
static void SetLocalIncludePath(char *sourceName);
static int PopNestedSource(enum ImportModes *prevMode);
static void ProcessLetterToken(void);
static void ProcessNumberToken(void);
static void EvalFixedConstant(int whole);
static void EvalHexConstant(void);
static void EvalRadixConstant(void);
static int DigitValue(char digit, int radix);
static void ProcessQuoteToken(void);
static void ProcessSpecialToken(void);
static boolean CheckForKeyword(void);
static boolean CheckForLineSpecial(void);
static boolean CheckForConstant(void);
static void NextChr(void);
static void SkipComment(void);
static void SkipCPPComment(void);
static void BumpMasterSourceLine(char Chr, boolean clear); // master line - Ty 07jan2000
static char *AddFileName(const char *name);
static int OctalChar();
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
tokenType_t tk_Token;
int tk_Line;
int tk_Number;
char *tk_String;
int tk_SpecialValue;
int tk_SpecialArgCount;
char *tk_SourceName;
int tk_IncludedLines;
boolean forSemicolonHack;
char MasterSourceLine[MAX_STATEMENT_LENGTH+1]; // master line - Ty 07jan2000
int MasterSourcePos; // master position - Ty 07jan2000
int PrevMasterSourcePos; // previous master position - RH 09feb2000
boolean ClearMasterSourceLine; // master clear flag - Ty 07jan2000
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static char Chr;
static char *FileStart;
static char *FilePtr;
static char *FileEnd;
static boolean SourceOpen;
static char ASCIIToChrCode[256];
static byte ASCIIToHexDigit[256];
static char TokenStringBuffer[MAX_QUOTED_LENGTH];
static nestInfo_t OpenFiles[MAX_NESTED_SOURCES];
static boolean AlreadyGot;
static int NestDepth;
static boolean IncLineNumber;
static char *FileNames;
static size_t FileNamesLen, FileNamesMax;
// Pascal 12/11/08
// Include paths. Lowest is searched first.
// Include path 0 is always set to the directory of the file being parsed.
static char IncludePaths[MAX_INCLUDE_PATHS][MAX_FILE_NAME_LENGTH];
static int NumIncludePaths;
static struct keyword_s
{
char *name;
tokenType_t token;
} Keywords[] =
{
{ "break", TK_BREAK },
{ "case", TK_CASE },
{ "const", TK_CONST },
{ "continue", TK_CONTINUE },
{ "default", TK_DEFAULT },
{ "define", TK_DEFINE },
{ "do", TK_DO },
{ "else", TK_ELSE },
{ "for", TK_FOR },
{ "goto", TK_GOTO },
{ "if", TK_IF },
{ "include", TK_INCLUDE },
{ "int", TK_INT },
{ "open", TK_OPEN },
{ "print", TK_PRINT },
{ "printbold", TK_PRINTBOLD },
{ "log", TK_LOG },
{ "hudmessage", TK_HUDMESSAGE },
{ "hudmessagebold", TK_HUDMESSAGEBOLD },
{ "restart", TK_RESTART },
{ "script", TK_SCRIPT },
{ "special", TK_SPECIAL },
{ "str", TK_STR },
{ "suspend", TK_SUSPEND },
{ "switch", TK_SWITCH },
{ "terminate", TK_TERMINATE },
{ "until", TK_UNTIL },
{ "void", TK_VOID },
{ "while", TK_WHILE },
{ "world", TK_WORLD },
{ "global", TK_GLOBAL },
// [BC] Start Skulltag tokens.
{ "respawn", TK_RESPAWN },
{ "death", TK_DEATH },
{ "enter", TK_ENTER },
{ "pickup", TK_PICKUP },
{ "bluereturn", TK_BLUERETURN },
{ "redreturn", TK_REDRETURN },
{ "whitereturn", TK_WHITERETURN },
// [BC] End Skulltag tokens.
{ "nocompact", TK_NOCOMPACT },
{ "lightning", TK_LIGHTNING },
{ "createtranslation", TK_CREATETRANSLATION },
{ "function", TK_FUNCTION },
{ "return", TK_RETURN },
{ "wadauthor", TK_WADAUTHOR },
{ "nowadauthor", TK_NOWADAUTHOR },
{ "acs_executewait", TK_ACSEXECUTEWAIT },
{ "acs_namedexecutewait", TK_ACSNAMEDEXECUTEWAIT },
{ "encryptstrings", TK_ENCRYPTSTRINGS },
{ "import", TK_IMPORT },
{ "library", TK_LIBRARY },
{ "libdefine", TK_LIBDEFINE },
{ "bool", TK_BOOL },
{ "net", TK_NET },
{ "clientside", TK_CLIENTSIDE }, // [BB]
{ "disconnect", TK_DISCONNECT },
{ "event", TK_EVENT }, //[BB]
{ "unloading", TK_UNLOADING },
{ "static", TK_STATIC },
{ "strparam", TK_STRPARAM_EVAL }, // [FDARI]
{ "strcpy", TK_STRCPY }, // [FDARI]
{ "region", TK_REGION }, // [mxd]
{ "endregion", TK_ENDREGION }, // [mxd]
{ "kill", TK_KILL }, // [JM]
{ "reopen", TK_REOPEN }, // [Nash]
{ "morphactor", TK_MORPHACTOR }, // [Dasperal]
{ "lumpreadarray", TK_LUMPREADARRAY }, // [TDRR]
};
#define NUM_KEYWORDS (sizeof(Keywords)/sizeof(Keywords[0]))
// CODE --------------------------------------------------------------------
//==========================================================================
//
// TK_Init
//
//==========================================================================
void TK_Init(void)
{
int i;
for(i = 0; i < 256; i++)
{
ASCIIToChrCode[i] = CHR_SPECIAL;
ASCIIToHexDigit[i] = NON_HEX_DIGIT;
}
for(i = '0'; i <= '9'; i++)
{
ASCIIToChrCode[i] = CHR_NUMBER;
ASCIIToHexDigit[i] = i-'0';
}
for(i = 'A'; i <= 'F'; i++)
{
ASCIIToHexDigit[i] = 10+(i-'A');
}
for(i = 'a'; i <= 'f'; i++)
{
ASCIIToHexDigit[i] = 10+(i-'a');
}
for(i = 'A'; i <= 'Z'; i++)
{
ASCIIToChrCode[i] = CHR_LETTER;
}
for(i = 'a'; i <= 'z'; i++)
{
ASCIIToChrCode[i] = CHR_LETTER;
}
ASCIIToChrCode[ASCII_QUOTE] = CHR_QUOTE;
ASCIIToChrCode[ASCII_UNDERSCORE] = CHR_LETTER;
ASCIIToChrCode[EOF_CHARACTER] = CHR_EOF;
tk_String = TokenStringBuffer;
IncLineNumber = FALSE;
tk_IncludedLines = 0;
NumIncludePaths = 1; // the first path is always the parsed file path - Pascal 12/11/08
SourceOpen = FALSE;
*MasterSourceLine = '\0'; // master line - Ty 07jan2000
MasterSourcePos = 0; // master position - Ty 07jan2000
ClearMasterSourceLine = TRUE; // clear the line to start
qsort (Keywords, NUM_KEYWORDS, sizeof(Keywords[0]), SortKeywords);
FileNames = MS_Alloc(4096, ERR_OUT_OF_MEMORY);
FileNamesLen = 0;
FileNamesMax = 4096;
}
//==========================================================================
//
// SortKeywords
//
//==========================================================================
static int SortKeywords(const void *a, const void *b)
{
return strcmp (((struct keyword_s *)a)->name,
((struct keyword_s *)b)->name);
}
//==========================================================================
//
// TK_OpenSource
//
//==========================================================================
void TK_OpenSource(char *fileName)
{
int size;
TK_CloseSource();
size = MS_LoadFile(fileName, &FileStart);
tk_SourceName = AddFileName(fileName);
SetLocalIncludePath(fileName);
SourceOpen = TRUE;
FileEnd = FileStart+size;
FilePtr = FileStart;
tk_Line = 1;
tk_Token = TK_NONE;
AlreadyGot = FALSE;
NestDepth = 0;
NextChr();
}
//==========================================================================
//
// AddFileName
//
//==========================================================================
static char *AddFileName(const char *name)
{
size_t len = strlen(name) + 1;
char *namespot;
if (FileNamesLen + len > FileNamesMax)
{
FileNames = MS_Alloc(FileNamesMax, ERR_OUT_OF_MEMORY);
FileNamesLen = 0;
}
namespot = FileNames + FileNamesLen;
memcpy(namespot, name, len);
FileNamesLen += len;
return namespot;
}
//==========================================================================
//
// TK_AddIncludePath
// This adds an include path with less priority than the ones already added
//
// Pascal 12/11/08
//
//==========================================================================
void TK_AddIncludePath(char *sourcePath)
{
if(NumIncludePaths < MAX_INCLUDE_PATHS)
{
// Add to list
strcpy(IncludePaths[NumIncludePaths], sourcePath);
// Not ending with directory delimiter?
if(!MS_IsDirectoryDelimiter(*(IncludePaths[NumIncludePaths] + strlen(IncludePaths[NumIncludePaths]) - 1)))
{
// Add a directory delimiter to the include path
strcat(IncludePaths[NumIncludePaths], "/");
}
MS_Message(MSG_DEBUG, "Add include path %d: \"%s\"\n", NumIncludePaths, IncludePaths[NumIncludePaths]);
NumIncludePaths++;
}
}
//==========================================================================
//
// TK_AddProgramIncludePath
// Adds an include path for the directory of the executable.
//
//==========================================================================
void TK_AddProgramIncludePath(char *progname)
{
if(NumIncludePaths < MAX_INCLUDE_PATHS)
{
#ifdef _WIN32
#ifdef _MSC_VER
#if _MSC_VER >= 1300
if (_get_pgmptr(&progname) != 0)
{
return;
}
#else
progname = _pgmptr;
#endif
#else
char progbuff[1024];
GetModuleFileName(0, progbuff, sizeof(progbuff));
progbuff[sizeof(progbuff)-1] = '\0';
progname = progbuff;
#endif
#else
char progbuff[PATH_MAX];
if (realpath(progname, progbuff) != NULL)
{
progname = progbuff;
}
#endif
strcpy(IncludePaths[NumIncludePaths], progname);
if(MS_StripFilename(IncludePaths[NumIncludePaths]))
{
MS_Message(MSG_DEBUG, "Program include path is %d: \"%s\"\n", NumIncludePaths, IncludePaths[NumIncludePaths]);
NumIncludePaths++;
}
}
}
//==========================================================================
//
// SetLocalIncludePath
// This sets the first include path
//
// Pascal 12/11/08
//
//==========================================================================
static void SetLocalIncludePath(char *sourceName)
{
strcpy(IncludePaths[0], sourceName);
if(MS_StripFilename(IncludePaths[0]) == NO)
{
IncludePaths[0][0] = 0;
}
}
//==========================================================================
//
// TK_Include
//
//==========================================================================
void TK_Include(char *fileName)
{
char sourceName[MAX_FILE_NAME_LENGTH];
int size, i;
nestInfo_t *info;
boolean foundfile = FALSE;
MS_Message(MSG_DEBUG, "*Including %s\n", fileName);
if(NestDepth == MAX_NESTED_SOURCES)
{
ERR_Exit(ERR_INCL_NESTING_TOO_DEEP, YES, fileName);
}
info = &OpenFiles[NestDepth++];
info->name = tk_SourceName;
info->start = FileStart;
info->end = FileEnd;
info->position = FilePtr;
info->line = tk_Line;
info->incLineNumber = IncLineNumber;
info->lastChar = Chr;
info->imported = NO;
// Pascal 30/11/08
// Handle absolute paths
if(MS_IsPathAbsolute(fileName))
{
#if defined(_WIN32) || defined(__MSDOS__)
sourceName[0] = '\0';
if(MS_IsDirectoryDelimiter(fileName[0]))
{
// The source file is absolute for the drive, but does not
// specify a drive. Use the path for the current file to
// get the drive letter, if it has one.
if(IncludePaths[0][0] != '\0' && IncludePaths[0][1] == ':')
{
sourceName[0] = IncludePaths[0][0];
sourceName[1] = ':';
sourceName[2] = '\0';
}
}
strcat(sourceName, fileName);
#else
strcpy(sourceName, fileName);
#endif
foundfile = MS_FileExists(sourceName);
}
else
{
// Pascal 12/11/08
// Find the file in the include paths
for(i = 0; i < NumIncludePaths; i++)
{
strcpy(sourceName, IncludePaths[i]);
strcat(sourceName, fileName);
if(MS_FileExists(sourceName))
{
foundfile = TRUE;
break;
}
}
}
if(!foundfile)
{
ERR_ErrorAt(tk_SourceName, tk_Line);
ERR_Exit(ERR_CANT_FIND_INCLUDE, YES, fileName, tk_SourceName, tk_Line);
}
MS_Message(MSG_DEBUG, "*Include file found at %s\n", sourceName);
// Now change the first include path to the file directory
SetLocalIncludePath(sourceName);
tk_SourceName = AddFileName(sourceName);
size = MS_LoadFile(tk_SourceName, &FileStart);
FileEnd = FileStart+size;
FilePtr = FileStart;
tk_Line = 1;
IncLineNumber = FALSE;
tk_Token = TK_NONE;
AlreadyGot = FALSE;
BumpMasterSourceLine('x',TRUE); // dummy x
NextChr();
}
//==========================================================================
//
// TK_Import
//
//==========================================================================
void TK_Import(char *fileName, enum ImportModes prevMode)
{
TK_Include (fileName);
OpenFiles[NestDepth - 1].imported = YES;
OpenFiles[NestDepth - 1].prevMode = prevMode;
ImportMode = IMPORT_Importing;
}
//==========================================================================
//
// PopNestedSource
//
//==========================================================================
static int PopNestedSource(enum ImportModes *prevMode)
{
nestInfo_t *info;
MS_Message(MSG_DEBUG, "*Leaving %s\n", tk_SourceName);
free(FileStart);
SY_FreeConstants(NestDepth);
tk_IncludedLines += tk_Line;
info = &OpenFiles[--NestDepth];
tk_SourceName = info->name;
FileStart = info->start;
FileEnd = info->end;
FilePtr = info->position;
tk_Line = info->line;
IncLineNumber = info->incLineNumber;
Chr = info->lastChar;
tk_Token = TK_NONE;
AlreadyGot = FALSE;
// Pascal 12/11/08
// Set the first include path back to this file directory
SetLocalIncludePath(tk_SourceName);
*prevMode = info->prevMode;
return info->imported ? 2 : 0;
}
//==========================================================================
//
// TK_CloseSource
//
//==========================================================================
void TK_CloseSource(void)
{
int i;
if(SourceOpen)
{
free(FileStart);
for(i = 0; i < NestDepth; i++)
{
free(OpenFiles[i].start);
}
SourceOpen = FALSE;
}
}
//==========================================================================
//
// TK_GetDepth
//
//==========================================================================
int TK_GetDepth(void)
{
return NestDepth;
}
//==========================================================================
//
// TK_NextToken
//
//==========================================================================
tokenType_t TK_NextToken(void)
{
enum ImportModes prevMode;
boolean validToken;
if(AlreadyGot == TRUE)
{
int t = MasterSourcePos;
MasterSourcePos = PrevMasterSourcePos;
PrevMasterSourcePos = t;
AlreadyGot = FALSE;
return tk_Token;
}
tk_String = TokenStringBuffer;
validToken = NO;
PrevMasterSourcePos = MasterSourcePos;
do
{
while(Chr == ASCII_SPACE)
{
NextChr();
}
switch(ASCIIToChrCode[(byte)Chr])
{
case CHR_EOF:
tk_Token = TK_EOF;
break;
case CHR_LETTER:
ProcessLetterToken();
break;
case CHR_NUMBER:
ProcessNumberToken();
break;
case CHR_QUOTE:
ProcessQuoteToken();
break;
default:
ProcessSpecialToken();
break;
}
if(tk_Token == TK_STARTCOMMENT)
{
SkipComment();
}
else if(tk_Token == TK_CPPCOMMENT)
{
SkipCPPComment();
}
else if((tk_Token == TK_EOF) && (NestDepth > 0))
{
if (PopNestedSource(&prevMode))
{
ImportMode = prevMode;
if(!ExporterFlagged)
{
ERR_Exit(ERR_EXPORTER_NOT_FLAGGED, YES, NULL);
}
SY_ClearShared();
}
}
else
{
validToken = YES;
}
} while(validToken == NO);
return tk_Token;
}
//==========================================================================
//
// TK_NextCharacter
//
//==========================================================================
int TK_NextCharacter(void)
{
int c;
while(Chr == ASCII_SPACE)
{
NextChr();
}
c = (int)Chr;
if(c == EOF_CHARACTER)
{
c = -1;
}
NextChr();
return c;
}
//==========================================================================
//
// TK_SkipPast
//
//==========================================================================
void TK_SkipPast(tokenType_t token)
{
while (tk_Token != token && tk_Token != TK_EOF)
{
TK_NextToken();
}
TK_NextToken();
}
//==========================================================================
//
// TK_SkipTo
//
//==========================================================================
void TK_SkipTo(tokenType_t token)
{
while (tk_Token != token && tk_Token != TK_EOF)
{
TK_NextToken();
}
}
//==========================================================================
//
// TK_NextTokenMustBe
//
//==========================================================================
boolean TK_NextTokenMustBe(tokenType_t token, error_t error)
{
if(TK_NextToken() != token)
{
ERR_Error(error, YES);
/*
if(skipToken == TK_EOF)
{
ERR_Finish();
}
else if(skipToken != TK_NONE)
{
TK_SkipPast(skipToken);
}
return NO;
*/
ERR_Finish();
}
return YES;
}
//==========================================================================
//
// TK_TokenMustBe
//
//==========================================================================
boolean TK_TokenMustBe(tokenType_t token, error_t error)
{
if (token == TK_SEMICOLON && forSemicolonHack)
{
token = TK_RPAREN;
}
if(tk_Token != token)
{
ERR_Error(error, YES);
/*
if(skipToken == TK_EOF)
{
ERR_Finish();
}
else if(skipToken != TK_NONE)
{
while(tk_Token != skipToken)
{
TK_NextToken();
}
}
return NO;
*/
ERR_Finish();
}
return YES;
}
//==========================================================================
//
// TK_Member
//
//==========================================================================
boolean TK_Member(tokenType_t *list)
{
int i;
for(i = 0; list[i] != TK_NONE; i++)
{
if(tk_Token == list[i])
{
return YES;
}
}
return NO;
}
//==========================================================================
//
// TK_Undo
//
//==========================================================================
void TK_Undo(void)
{
if(tk_Token != TK_NONE)
{
if (AlreadyGot == FALSE)
{
int t = MasterSourcePos;
MasterSourcePos = PrevMasterSourcePos;
PrevMasterSourcePos = t;
AlreadyGot = TRUE;
}
}
}
//==========================================================================
//
// ProcessLetterToken
//
//==========================================================================
static void ProcessLetterToken(void)
{
int i;
char *text;
i = 0;
text = TokenStringBuffer;
while (ASCIIToChrCode[(byte)Chr] == CHR_LETTER
|| ASCIIToChrCode[(byte)Chr] == CHR_NUMBER)
{
if(++i == MAX_IDENTIFIER_LENGTH)
{
ERR_Error(ERR_IDENTIFIER_TOO_LONG, YES);
}
if(i < MAX_IDENTIFIER_LENGTH)
{
*text++ = Chr;
}
NextChr();
}
*text = 0;
MS_StrLwr(TokenStringBuffer);
if(CheckForKeyword() == FALSE
&& CheckForLineSpecial() == FALSE
&& CheckForConstant() == FALSE)
{
tk_Token = TK_IDENTIFIER;
}
}
//==========================================================================
//
// CheckForKeyword
//
//==========================================================================
static boolean CheckForKeyword(void)
{
int min, max, probe, lexx;
// [RH] Use a binary search
min = 0;
max = NUM_KEYWORDS-1;
probe = NUM_KEYWORDS/2;
while (max - min >= 0)
{
lexx = strcmp(tk_String, Keywords[probe].name);
if(lexx == 0)
{
tk_Token = Keywords[probe].token;
return TRUE;
}
else if(lexx < 0)
{
max = probe-1;
}
else
{
min = probe+1;
}
probe = (max-min)/2+min;
}
return FALSE;
}
//==========================================================================
//
// CheckForLineSpecial
//
//==========================================================================
static boolean CheckForLineSpecial(void)
{
symbolNode_t *sym;
sym = SY_FindGlobal(tk_String);
if(sym == NULL)
{
return FALSE;
}
if(sym->type != SY_SPECIAL)
{
return FALSE;
}
tk_Token = TK_LINESPECIAL;
tk_SpecialValue = sym->info.special.value;
tk_SpecialArgCount = sym->info.special.argCount;
return TRUE;
}
//==========================================================================
//
// CheckForConstant
//
//==========================================================================
static boolean CheckForConstant(void)
{
symbolNode_t *sym;
sym = SY_FindGlobal(tk_String);
if(sym == NULL)
{
return FALSE;
}
if(sym->type != SY_CONSTANT)
{
return FALSE;
}
if(sym->info.constant.strValue != NULL)
{
MS_Message(MSG_DEBUG, "Constant string: %s\n", sym->info.constant.strValue);
tk_Token = TK_STRING;
tk_String = sym->info.constant.strValue;
}
else
{
tk_Token = TK_NUMBER;
tk_Number = sym->info.constant.value;
}
return TRUE;
}
//==========================================================================
//
// ProcessNumberToken
//
//==========================================================================
static void ProcessNumberToken(void)
{
char c;
c = Chr;
NextChr();
if(c == '0' && (Chr == 'x' || Chr == 'X'))
{ // Hexadecimal constant
NextChr();
EvalHexConstant();
return;
}
tk_Number = c-'0';
while(ASCIIToChrCode[(byte)Chr] == CHR_NUMBER)
{
tk_Number = 10*tk_Number+(Chr-'0');
NextChr();
}
if(Chr == '.')
{ // Fixed point
NextChr(); // Skip period
EvalFixedConstant(tk_Number);
return;
}
if(Chr == ASCII_UNDERSCORE)
{
NextChr(); // Skip underscore
EvalRadixConstant();
return;
}
tk_Token = TK_NUMBER;
}
//==========================================================================
//
// EvalFixedConstant
//
//==========================================================================
static void EvalFixedConstant(int whole)
{
double frac;
double divisor;
frac = 0;
divisor = 1;
while(ASCIIToChrCode[(byte)Chr] == CHR_NUMBER)
{
frac = 10*frac+(Chr-'0');
divisor *= 10;
NextChr();
}
tk_Number = (whole<<16)+(int)(65536.0*frac/divisor);
tk_Token = TK_NUMBER;
}