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Lexer.cpp
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/*****************************************************************************
The Dark Mod GPL Source Code
This file is part of the The Dark Mod Source Code, originally based
on the Doom 3 GPL Source Code as published in 2011.
The Dark Mod Source Code is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version. For details, see LICENSE.TXT.
Project: The Dark Mod (http://www.thedarkmod.com/)
******************************************************************************/
#include "precompiled.h"
#pragma hdrstop
#pragma warning( push )
#pragma warning( disable : 4127 )
#define PUNCTABLE
//longer punctuations first
punctuation_t default_punctuations[] = {
//binary operators
{">>=",P_RSHIFT_ASSIGN},
{"<<=",P_LSHIFT_ASSIGN},
//
{"...",P_PARMS},
//define merge operator
{"##",P_PRECOMPMERGE}, // pre-compiler
//logic operators
{"&&",P_LOGIC_AND}, // pre-compiler
{"||",P_LOGIC_OR}, // pre-compiler
{">=",P_LOGIC_GEQ}, // pre-compiler
{"<=",P_LOGIC_LEQ}, // pre-compiler
{"==",P_LOGIC_EQ}, // pre-compiler
{"!=",P_LOGIC_UNEQ}, // pre-compiler
//arithmatic operators
{"*=",P_MUL_ASSIGN},
{"/=",P_DIV_ASSIGN},
{"%=",P_MOD_ASSIGN},
{"+=",P_ADD_ASSIGN},
{"-=",P_SUB_ASSIGN},
{"++",P_INC},
{"--",P_DEC},
//binary operators
{"&=",P_BIN_AND_ASSIGN},
{"|=",P_BIN_OR_ASSIGN},
{"^=",P_BIN_XOR_ASSIGN},
{">>",P_RSHIFT}, // pre-compiler
{"<<",P_LSHIFT}, // pre-compiler
//reference operators
{"->",P_POINTERREF},
//C++
{"::",P_CPP1},
{".*",P_CPP2},
//arithmatic operators
{"*",P_MUL}, // pre-compiler
{"/",P_DIV}, // pre-compiler
{"%",P_MOD}, // pre-compiler
{"+",P_ADD}, // pre-compiler
{"-",P_SUB}, // pre-compiler
{"=",P_ASSIGN},
//binary operators
{"&",P_BIN_AND}, // pre-compiler
{"|",P_BIN_OR}, // pre-compiler
{"^",P_BIN_XOR}, // pre-compiler
{"~",P_BIN_NOT}, // pre-compiler
//logic operators
{"!",P_LOGIC_NOT}, // pre-compiler
{">",P_LOGIC_GREATER}, // pre-compiler
{"<",P_LOGIC_LESS}, // pre-compiler
//reference operator
{".",P_REF},
//seperators
{",",P_COMMA}, // pre-compiler
{";",P_SEMICOLON},
//label indication
{":",P_COLON}, // pre-compiler
//if statement
{"?",P_QUESTIONMARK}, // pre-compiler
//embracements
{"(",P_PARENTHESESOPEN}, // pre-compiler
{")",P_PARENTHESESCLOSE}, // pre-compiler
{"{",P_BRACEOPEN}, // pre-compiler
{"}",P_BRACECLOSE}, // pre-compiler
{"[",P_SQBRACKETOPEN},
{"]",P_SQBRACKETCLOSE},
//
{"\\",P_BACKSLASH},
//precompiler operator
{"#",P_PRECOMP}, // pre-compiler
{"$",P_DOLLAR},
{NULL, 0}
};
int default_punctuationtable[256];
int default_nextpunctuation[sizeof(default_punctuations) / sizeof(punctuation_t)];
int default_setup;
char idLexer::baseFolder[ 256 ];
/*
================
idLexer::CreatePunctuationTable
================
*/
void idLexer::CreatePunctuationTable( const punctuation_t *punctuations ) {
int i, n, lastp;
const punctuation_t *p, *newp;
//get memory for the table
if ( punctuations == default_punctuations ) {
idLexer::punctuationtable = default_punctuationtable;
idLexer::nextpunctuation = default_nextpunctuation;
if ( default_setup ) {
return;
}
default_setup = true;
i = sizeof(default_punctuations) / sizeof(punctuation_t);
}
else {
if ( !idLexer::punctuationtable || idLexer::punctuationtable == default_punctuationtable ) {
idLexer::punctuationtable = (int *) Mem_Alloc(256 * sizeof(int));
}
if ( idLexer::nextpunctuation && idLexer::nextpunctuation != default_nextpunctuation ) {
Mem_Free( idLexer::nextpunctuation );
}
for (i = 0; punctuations[i].p; i++) {
}
idLexer::nextpunctuation = (int *) Mem_Alloc(i * sizeof(int));
}
memset(idLexer::punctuationtable, 0xFF, 256 * sizeof(int));
memset(idLexer::nextpunctuation, 0xFF, i * sizeof(int));
//add the punctuations in the list to the punctuation table
for (i = 0; punctuations[i].p; i++) {
newp = &punctuations[i];
lastp = -1;
//sort the punctuations in this table entry on length (longer punctuations first)
for (n = idLexer::punctuationtable[(unsigned int) newp->p[0]]; n >= 0; n = idLexer::nextpunctuation[n] ) {
p = &punctuations[n];
if (strlen(p->p) < strlen(newp->p)) {
idLexer::nextpunctuation[i] = n;
if (lastp >= 0) {
idLexer::nextpunctuation[lastp] = i;
}
else {
idLexer::punctuationtable[(unsigned int) newp->p[0]] = i;
}
break;
}
lastp = n;
}
if (n < 0) {
idLexer::nextpunctuation[i] = -1;
if (lastp >= 0) {
idLexer::nextpunctuation[lastp] = i;
}
else {
idLexer::punctuationtable[(unsigned int) newp->p[0]] = i;
}
}
}
}
/*
================
idLexer::GetPunctuationFromId
================
*/
const char *idLexer::GetPunctuationFromId( int id ) {
int i;
for (i = 0; idLexer::punctuations[i].p; i++) {
if ( idLexer::punctuations[i].n == id ) {
return idLexer::punctuations[i].p;
}
}
return "unkown punctuation";
}
/*
================
idLexer::GetPunctuationId
================
*/
int idLexer::GetPunctuationId( const char *p ) {
int i;
for (i = 0; idLexer::punctuations[i].p; i++) {
if ( !strcmp(idLexer::punctuations[i].p, p) ) {
return idLexer::punctuations[i].n;
}
}
return 0;
}
/*
================
idLexer::Error
================
*/
void idLexer::Error( const char *str, ... ) {
char text[MAX_STRING_CHARS];
va_list ap;
hadError = true;
if ( idLexer::flags & LEXFL_NOERRORS ) {
return;
}
va_start(ap, str);
vsprintf(text, str, ap);
va_end(ap);
if ( idLexer::flags & LEXFL_NOFATALERRORS ) {
idLib::common->Warning( "file %s, line %d: %s", idLexer::displayFilename.c_str(), idLexer::line, text );
} else {
idLib::common->Error( "file %s, line %d: %s", idLexer::displayFilename.c_str(), idLexer::line, text );
}
}
/*
================
idLexer::Warning
================
*/
void idLexer::Warning( const char *str, ... ) {
char text[MAX_STRING_CHARS];
va_list ap;
if ( idLexer::flags & LEXFL_NOWARNINGS ) {
return;
}
va_start( ap, str );
vsprintf( text, str, ap );
va_end( ap );
idLib::common->Warning( "file %s, line %d: %s", idLexer::displayFilename.c_str(), idLexer::line, text );
}
/*
================
idLexer::SetPunctuations
================
*/
void idLexer::SetPunctuations( const punctuation_t *p ) {
#ifdef PUNCTABLE
if (p) {
idLexer::CreatePunctuationTable( p );
}
else {
idLexer::CreatePunctuationTable( default_punctuations );
}
#endif //PUNCTABLE
if (p) {
idLexer::punctuations = p;
}
else {
idLexer::punctuations = default_punctuations;
}
}
/*
================
idLexer::ReadWhiteSpace
Reads spaces, tabs, C-like comments etc.
When a newline character is found the scripts line counter is increased.
================
*/
int idLexer::ReadWhiteSpace( void ) {
while(1) {
// skip white space
while(*idLexer::script_p <= ' ') {
if (!*idLexer::script_p) {
return 0;
}
if (*idLexer::script_p == '\n') {
idLexer::line++;
}
idLexer::script_p++;
}
// skip comments
if (*idLexer::script_p == '/') {
// comments //
if (*(idLexer::script_p+1) == '/') {
idLexer::script_p++;
do {
idLexer::script_p++;
if ( !*idLexer::script_p ) {
return 0;
}
}
while( *idLexer::script_p != '\n' );
idLexer::line++;
idLexer::script_p++;
if ( !*idLexer::script_p ) {
return 0;
}
continue;
}
// comments /* */
else if (*(idLexer::script_p+1) == '*') {
idLexer::script_p++;
while( 1 ) {
idLexer::script_p++;
if ( !*idLexer::script_p ) {
return 0;
}
if ( *idLexer::script_p == '\n' ) {
idLexer::line++;
}
else if ( *idLexer::script_p == '/' ) {
if ( *(idLexer::script_p-1) == '*' ) {
break;
}
if ( *(idLexer::script_p+1) == '*' ) {
idLexer::Warning( "nested comment" );
}
}
}
idLexer::script_p++;
if ( !*idLexer::script_p ) {
return 0;
}
continue;
}
}
break;
}
return 1;
}
/*
================
idLexer::ReadEscapeCharacter
================
*/
int idLexer::ReadEscapeCharacter( char *ch ) {
int c, val, i;
// step over the leading '\\'
idLexer::script_p++;
// determine the escape character
switch(*idLexer::script_p) {
case '\\': c = '\\'; break;
case 'n': c = '\n'; break;
case 'r': c = '\r'; break;
case 't': c = '\t'; break;
case 'v': c = '\v'; break;
case 'b': c = '\b'; break;
case 'f': c = '\f'; break;
case 'a': c = '\a'; break;
case '\'': c = '\''; break;
case '\"': c = '\"'; break;
case '\?': c = '\?'; break;
case 'x':
{
idLexer::script_p++;
for (i = 0, val = 0; ; i++, idLexer::script_p++) {
c = *idLexer::script_p;
if (c >= '0' && c <= '9')
c = c - '0';
else if (c >= 'A' && c <= 'Z')
c = c - 'A' + 10;
else if (c >= 'a' && c <= 'z')
c = c - 'a' + 10;
else
break;
val = (val << 4) + c;
}
idLexer::script_p--;
if (val > 0xFF) {
idLexer::Warning( "too large value in escape character" );
val = 0xFF;
}
c = val;
break;
}
default: //NOTE: decimal ASCII code, NOT octal
{
if (*idLexer::script_p < '0' || *idLexer::script_p > '9') {
idLexer::Error("unknown escape char");
}
for (i = 0, val = 0; ; i++, idLexer::script_p++) {
c = *idLexer::script_p;
if (c >= '0' && c <= '9')
c = c - '0';
else
break;
val = val * 10 + c;
}
idLexer::script_p--;
if (val > 0xFF) {
idLexer::Warning( "too large value in escape character" );
val = 0xFF;
}
c = val;
break;
}
}
// step over the escape character or the last digit of the number
idLexer::script_p++;
// store the escape character
*ch = c;
// succesfully read escape character
return 1;
}
/*
================
idLexer::ReadString
Escape characters are interpretted.
Reads two strings with only a white space between them as one string.
================
*/
int idLexer::ReadString( idToken *token, int quote ) {
int tmpline;
const char *tmpscript_p;
char ch;
if ( quote == '\"' ) {
token->type = TT_STRING;
} else {
token->type = TT_LITERAL;
}
// leading quote
idLexer::script_p++;
while(1) {
// if there is an escape character and escape characters are allowed
if (*idLexer::script_p == '\\' && !(idLexer::flags & LEXFL_NOSTRINGESCAPECHARS)) {
if ( !idLexer::ReadEscapeCharacter( &ch ) ) {
return 0;
}
token->AppendDirty( ch );
}
// if a trailing quote
else if (*idLexer::script_p == quote) {
// step over the quote
idLexer::script_p++;
// if consecutive strings should not be concatenated
if ( (idLexer::flags & LEXFL_NOSTRINGCONCAT) &&
(!(idLexer::flags & LEXFL_ALLOWBACKSLASHSTRINGCONCAT) || (quote != '\"')) ) {
break;
}
tmpscript_p = idLexer::script_p;
tmpline = idLexer::line;
// read white space between possible two consecutive strings
if ( !idLexer::ReadWhiteSpace() ) {
idLexer::script_p = tmpscript_p;
idLexer::line = tmpline;
break;
}
if ( idLexer::flags & LEXFL_NOSTRINGCONCAT ) {
if ( *idLexer::script_p != '\\' ) {
idLexer::script_p = tmpscript_p;
idLexer::line = tmpline;
break;
}
// step over the '\\'
idLexer::script_p++;
if ( !idLexer::ReadWhiteSpace() || ( *idLexer::script_p != quote ) ) {
idLexer::Error( "expecting string after '\\' terminated line" );
return 0;
}
}
// if there's no leading qoute
if ( *idLexer::script_p != quote ) {
idLexer::script_p = tmpscript_p;
idLexer::line = tmpline;
break;
}
// step over the new leading quote
idLexer::script_p++;
}
else {
if (*idLexer::script_p == '\0') {
idLexer::Error( "missing trailing quote" );
return 0;
}
if (*idLexer::script_p == '\n') {
idLexer::Error( "newline inside string" );
return 0;
}
token->AppendDirty( *idLexer::script_p++ );
}
}
token->data[token->len] = '\0';
if ( token->type == TT_LITERAL ) {
if ( !(idLexer::flags & LEXFL_ALLOWMULTICHARLITERALS) ) {
if ( token->Length() != 1 ) {
idLexer::Warning( "literal is not one character long" );
}
}
token->subtype = (*token)[0];
}
else {
// the sub type is the length of the string
token->subtype = token->Length();
}
return 1;
}
/*
================
idLexer::ReadName
================
*/
int idLexer::ReadName( idToken *token ) {
char c;
token->type = TT_NAME;
do {
token->AppendDirty( *idLexer::script_p++ );
c = *idLexer::script_p;
} while ((c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') ||
c == '_' ||
// if treating all tokens as strings, don't parse '-' as a seperate token
((idLexer::flags & LEXFL_ONLYSTRINGS) && (c == '-')) ||
// if special path name characters are allowed
((idLexer::flags & LEXFL_ALLOWPATHNAMES) && (c == '/' || c == '\\' || c == ':' || c == '.')) );
token->data[token->len] = '\0';
//the sub type is the length of the name
token->subtype = token->Length();
return 1;
}
/*
================
idLexer::CheckString
================
*/
ID_INLINE int idLexer::CheckString( const char *str ) const {
int i;
for ( i = 0; str[i]; i++ ) {
if ( idLexer::script_p[i] != str[i] ) {
return false;
}
}
return true;
}
/*
================
idLexer::ReadNumber
================
*/
int idLexer::ReadNumber( idToken *token ) {
int i;
int dot;
char c, c2;
token->type = TT_NUMBER;
token->subtype = 0;
token->intvalue = 0;
token->floatvalue = 0;
c = *idLexer::script_p;
c2 = *(idLexer::script_p + 1);
if ( c == '0' && c2 != '.' ) {
// check for a hexadecimal number
if ( c2 == 'x' || c2 == 'X' ) {
token->AppendDirty( *idLexer::script_p++ );
token->AppendDirty( *idLexer::script_p++ );
c = *idLexer::script_p;
while((c >= '0' && c <= '9') ||
(c >= 'a' && c <= 'f') ||
(c >= 'A' && c <= 'F')) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
token->subtype = TT_HEX | TT_INTEGER;
}
// check for a binary number
else if ( c2 == 'b' || c2 == 'B' ) {
token->AppendDirty( *idLexer::script_p++ );
token->AppendDirty( *idLexer::script_p++ );
c = *idLexer::script_p;
while( c == '0' || c == '1' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
token->subtype = TT_BINARY | TT_INTEGER;
}
// its an octal number
else {
token->AppendDirty( *idLexer::script_p++ );
c = *idLexer::script_p;
while( c >= '0' && c <= '7' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
token->subtype = TT_OCTAL | TT_INTEGER;
}
}
else {
// decimal integer or floating point number or ip address
dot = 0;
while( 1 ) {
if ( c >= '0' && c <= '9' ) {
}
else if ( c == '.' ) {
dot++;
}
else {
break;
}
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
if( c == 'e' && dot == 0) {
//We have scientific notation without a decimal point
dot++;
}
// if a floating point number
if ( dot == 1 ) {
token->subtype = TT_DECIMAL | TT_FLOAT;
// check for floating point exponent
if ( c == 'e' ) {
//Append the e so that GetFloatValue code works
token->AppendDirty( c );
c = *(++idLexer::script_p);
if ( c == '-' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
else if ( c == '+' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
while( c >= '0' && c <= '9' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
}
// check for floating point exception infinite 1.#INF or indefinite 1.#IND or NaN
else if ( c == '#' ) {
c2 = 4;
if ( CheckString( "INF" ) ) {
token->subtype |= TT_INFINITE;
}
else if ( CheckString( "IND" ) ) {
token->subtype |= TT_INDEFINITE;
}
else if ( CheckString( "NAN" ) ) {
token->subtype |= TT_NAN;
}
else if ( CheckString( "QNAN" ) ) {
token->subtype |= TT_NAN;
c2++;
}
else if ( CheckString( "SNAN" ) ) {
token->subtype |= TT_NAN;
c2++;
}
for ( i = 0; i < c2; i++ ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
while( c >= '0' && c <= '9' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
if ( !(idLexer::flags & LEXFL_ALLOWFLOATEXCEPTIONS) ) {
token->AppendDirty( 0 ); // zero terminate for c_str
idLexer::Error( "parsed %s", token->c_str() );
}
}
}
else if ( dot > 1 ) {
if ( !( idLexer::flags & LEXFL_ALLOWIPADDRESSES ) ) {
idLexer::Error( "more than one dot in number" );
return 0;
}
if ( dot != 3 ) {
idLexer::Error( "ip address should have three dots" );
return 0;
}
token->subtype = TT_IPADDRESS;
}
else {
token->subtype = TT_DECIMAL | TT_INTEGER;
}
}
if ( token->subtype & TT_FLOAT ) {
if ( c > ' ' ) {
// single-precision: float
if ( c == 'f' || c == 'F' ) {
token->subtype |= TT_SINGLE_PRECISION;
idLexer::script_p++;
}
// extended-precision: long double
else if ( c == 'l' || c == 'L' ) {
token->subtype |= TT_EXTENDED_PRECISION;
idLexer::script_p++;
}
// default is double-precision: double
else {
token->subtype |= TT_DOUBLE_PRECISION;
}
}
else {
token->subtype |= TT_DOUBLE_PRECISION;
}
}
else if ( token->subtype & TT_INTEGER ) {
if ( c > ' ' ) {
// default: signed long
for ( i = 0; i < 2; i++ ) {
// long integer
if ( c == 'l' || c == 'L' ) {
token->subtype |= TT_LONG;
}
// unsigned integer
else if ( c == 'u' || c == 'U' ) {
token->subtype |= TT_UNSIGNED;
}
else {
break;
}
c = *(++idLexer::script_p);
}
}
}
else if ( token->subtype & TT_IPADDRESS ) {
if ( c == ':' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
while( c >= '0' && c <= '9' ) {
token->AppendDirty( c );
c = *(++idLexer::script_p);
}
token->subtype |= TT_IPPORT;
}
}
token->data[token->len] = '\0';
return 1;
}
/*
================
idLexer::ReadPunctuation
================
*/
int idLexer::ReadPunctuation( idToken *token ) {
int l, n, i;
const char *p;
const punctuation_t *punc;
#ifdef PUNCTABLE
for (n = idLexer::punctuationtable[(unsigned int)*(idLexer::script_p)]; n >= 0; n = idLexer::nextpunctuation[n])
{
punc = &(idLexer::punctuations[n]);
#else
int i;
for (i = 0; idLexer::punctuations[i].p; i++) {
punc = &idLexer::punctuations[i];
#endif
p = punc->p;
// check for this punctuation in the script
for ( l = 0; p[l] && idLexer::script_p[l]; l++ ) {
if ( idLexer::script_p[l] != p[l] ) {
break;
}
}
if ( !p[l] ) {
//
token->EnsureAlloced( l+1, false );
for ( i = 0; i <= l; i++ ) {
token->data[i] = p[i];
}
token->len = l;
//
idLexer::script_p += l;
token->type = TT_PUNCTUATION;
// sub type is the punctuation id
token->subtype = punc->n;
return 1;
}
}
return 0;
}
/*
================
idLexer::ReadToken
================
*/
int idLexer::ReadToken( idToken *token ) {
int c;
if ( !loaded ) {
idLib::common->Error( "idLexer::ReadToken: no file loaded" );
return 0;
}
// if there is a token available (from unreadToken)
if ( tokenavailable ) {
tokenavailable = 0;
*token = idLexer::token;
return 1;
}
// save script pointer
lastScript_p = script_p;
// save line counter
lastline = line;
// clear the token stuff
token->data[0] = '\0';
token->len = 0;
// start of the white space
whiteSpaceStart_p = script_p;
token->whiteSpaceStart_p = script_p;
// read white space before token
if ( !ReadWhiteSpace() ) {
return 0;
}
// end of the white space
idLexer::whiteSpaceEnd_p = script_p;
token->whiteSpaceEnd_p = script_p;
// line the token is on
token->line = line;
// number of lines crossed before token
token->linesCrossed = line - lastline;
// clear token flags
token->flags = 0;
c = *idLexer::script_p;
// if we're keeping everything as whitespace deliminated strings
if ( idLexer::flags & LEXFL_ONLYSTRINGS ) {
// if there is a leading quote
if ( c == '\"' || c == '\'' ) {
if (!idLexer::ReadString( token, c )) {
return 0;
}
} else if ( !idLexer::ReadName( token ) ) {
return 0;
}
}
// if there is a number
else if ( (c >= '0' && c <= '9') ||
(c == '.' && (*(idLexer::script_p + 1) >= '0' && *(idLexer::script_p + 1) <= '9')) ) {
if ( !idLexer::ReadNumber( token ) ) {
return 0;
}
// if names are allowed to start with a number
if ( idLexer::flags & LEXFL_ALLOWNUMBERNAMES ) {
c = *idLexer::script_p;
if ( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' ) {
if ( !idLexer::ReadName( token ) ) {
return 0;
}
}
}
}
// if there is a leading quote
else if ( c == '\"' || c == '\'' ) {
if (!idLexer::ReadString( token, c )) {
return 0;
}
}
// if there is a name
else if ( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' ) {
if ( !idLexer::ReadName( token ) ) {
return 0;
}
}
// names may also start with a slash when pathnames are allowed
else if ( ( idLexer::flags & LEXFL_ALLOWPATHNAMES ) && ( (c == '/' || c == '\\') || c == '.' ) ) {
if ( !idLexer::ReadName( token ) ) {
return 0;
}
}
// check for punctuations
else if ( !idLexer::ReadPunctuation( token ) ) {
idLexer::Error( "unknown punctuation %c", c );
return 0;
}
// succesfully read a token
return 1;
}
/*
================
idLexer::ExpectTokenString
================
*/
int idLexer::ExpectTokenString( const char *string ) {
idToken token;
if (!idLexer::ReadToken( &token )) {
idLexer::Error( "couldn't find expected '%s'", string );
return 0;
}
if ( token != string ) {
idLexer::Error( "expected '%s' but found '%s'", string, token.c_str() );
return 0;
}
return 1;
}
/*
================
idLexer::ExpectTokenType
================
*/
int idLexer::ExpectTokenType( int type, int subtype, idToken *token ) {
idStr str;
if ( !idLexer::ReadToken( token ) ) {
idLexer::Error( "couldn't read expected token" );
return 0;
}
if ( token->type != type ) {
switch( type ) {
case TT_STRING: str = "string"; break;
case TT_LITERAL: str = "literal"; break;
case TT_NUMBER: str = "number"; break;
case TT_NAME: str = "name"; break;
case TT_PUNCTUATION: str = "punctuation"; break;
default: str = "unknown type"; break;
}
idLexer::Error( "expected a %s but found '%s'", str.c_str(), token->c_str() );
return 0;
}
if ( token->type == TT_NUMBER ) {
if ( (token->subtype & subtype) != subtype ) {
str.Clear();
if ( subtype & TT_DECIMAL ) str = "decimal ";
if ( subtype & TT_HEX ) str = "hex ";
if ( subtype & TT_OCTAL ) str = "octal ";
if ( subtype & TT_BINARY ) str = "binary ";
if ( subtype & TT_UNSIGNED ) str += "unsigned ";
if ( subtype & TT_LONG ) str += "long ";
if ( subtype & TT_FLOAT ) str += "float ";
if ( subtype & TT_INTEGER ) str += "integer ";
str.StripTrailing( ' ' );
idLexer::Error( "expected %s but found '%s'", str.c_str(), token->c_str() );
return 0;
}
}
else if ( token->type == TT_PUNCTUATION ) {
if ( subtype < 0 ) {
idLexer::Error( "BUG: wrong punctuation subtype" );
return 0;
}
if ( token->subtype != subtype ) {
idLexer::Error( "expected '%s' but found '%s'", GetPunctuationFromId( subtype ), token->c_str() );
return 0;
}
}
return 1;
}
/*
================
idLexer::ExpectAnyToken
================
*/
int idLexer::ExpectAnyToken( idToken *token ) {
if (!idLexer::ReadToken( token )) {
idLexer::Error( "couldn't read expected token" );
return 0;
}
else {
return 1;
}
}
/*
================
idLexer::CheckTokenString
================
*/
int idLexer::CheckTokenString( const char *string ) {