1 /*****************************************************************************/
5 /* Source file line info structure */
9 /* (C) 1998-2009, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
64 /*****************************************************************************/
66 /*****************************************************************************/
70 Token CurTok; /* The current token */
71 Token NextTok; /* The next token */
77 TT_C89 = 0x01 << STD_C89, /* Token valid in C89 */
78 TT_C99 = 0x01 << STD_C99, /* Token valid in C99 */
79 TT_CC65 = 0x01 << STD_CC65 /* Token valid in cc65 */
83 static const struct Keyword {
84 char* Key; /* Keyword name */
85 unsigned char Tok; /* The token */
86 unsigned char Std; /* Token supported in which standards? */
88 { "_Pragma", TOK_PRAGMA, TT_C89 | TT_C99 | TT_CC65 }, /* !! */
89 { "__AX__", TOK_AX, TT_C89 | TT_C99 | TT_CC65 },
90 { "__A__", TOK_A, TT_C89 | TT_C99 | TT_CC65 },
91 { "__EAX__", TOK_EAX, TT_C89 | TT_C99 | TT_CC65 },
92 { "__X__", TOK_X, TT_C89 | TT_C99 | TT_CC65 },
93 { "__Y__", TOK_Y, TT_C89 | TT_C99 | TT_CC65 },
94 { "__asm__", TOK_ASM, TT_C89 | TT_C99 | TT_CC65 },
95 { "__attribute__", TOK_ATTRIBUTE, TT_C89 | TT_C99 | TT_CC65 },
96 { "__far__", TOK_FAR, TT_C89 | TT_C99 | TT_CC65 },
97 { "__fastcall__", TOK_FASTCALL, TT_C89 | TT_C99 | TT_CC65 },
98 { "__inline__", TOK_INLINE, TT_C89 | TT_C99 | TT_CC65 },
99 { "__near__", TOK_NEAR, TT_C89 | TT_C99 | TT_CC65 },
100 { "asm", TOK_ASM, TT_CC65 },
101 { "auto", TOK_AUTO, TT_C89 | TT_C99 | TT_CC65 },
102 { "break", TOK_BREAK, TT_C89 | TT_C99 | TT_CC65 },
103 { "case", TOK_CASE, TT_C89 | TT_C99 | TT_CC65 },
104 { "char", TOK_CHAR, TT_C89 | TT_C99 | TT_CC65 },
105 { "const", TOK_CONST, TT_C89 | TT_C99 | TT_CC65 },
106 { "continue", TOK_CONTINUE, TT_C89 | TT_C99 | TT_CC65 },
107 { "default", TOK_DEFAULT, TT_C89 | TT_C99 | TT_CC65 },
108 { "do", TOK_DO, TT_C89 | TT_C99 | TT_CC65 },
109 { "double", TOK_DOUBLE, TT_C89 | TT_C99 | TT_CC65 },
110 { "else", TOK_ELSE, TT_C89 | TT_C99 | TT_CC65 },
111 { "enum", TOK_ENUM, TT_C89 | TT_C99 | TT_CC65 },
112 { "extern", TOK_EXTERN, TT_C89 | TT_C99 | TT_CC65 },
113 { "far", TOK_FAR, TT_CC65 },
114 { "fastcall", TOK_FASTCALL, TT_CC65 },
115 { "float", TOK_FLOAT, TT_C89 | TT_C99 | TT_CC65 },
116 { "for", TOK_FOR, TT_C89 | TT_C99 | TT_CC65 },
117 { "goto", TOK_GOTO, TT_C89 | TT_C99 | TT_CC65 },
118 { "if", TOK_IF, TT_C89 | TT_C99 | TT_CC65 },
119 { "inline", TOK_INLINE, TT_C99 | TT_CC65 },
120 { "int", TOK_INT, TT_C89 | TT_C99 | TT_CC65 },
121 { "long", TOK_LONG, TT_C89 | TT_C99 | TT_CC65 },
122 { "near", TOK_NEAR, TT_CC65 },
123 { "register", TOK_REGISTER, TT_C89 | TT_C99 | TT_CC65 },
124 { "restrict", TOK_RESTRICT, TT_C99 | TT_CC65 },
125 { "return", TOK_RETURN, TT_C89 | TT_C99 | TT_CC65 },
126 { "short", TOK_SHORT, TT_C89 | TT_C99 | TT_CC65 },
127 { "signed", TOK_SIGNED, TT_C89 | TT_C99 | TT_CC65 },
128 { "sizeof", TOK_SIZEOF, TT_C89 | TT_C99 | TT_CC65 },
129 { "static", TOK_STATIC, TT_C89 | TT_C99 | TT_CC65 },
130 { "struct", TOK_STRUCT, TT_C89 | TT_C99 | TT_CC65 },
131 { "switch", TOK_SWITCH, TT_C89 | TT_C99 | TT_CC65 },
132 { "typedef", TOK_TYPEDEF, TT_C89 | TT_C99 | TT_CC65 },
133 { "union", TOK_UNION, TT_C89 | TT_C99 | TT_CC65 },
134 { "unsigned", TOK_UNSIGNED, TT_C89 | TT_C99 | TT_CC65 },
135 { "void", TOK_VOID, TT_C89 | TT_C99 | TT_CC65 },
136 { "volatile", TOK_VOLATILE, TT_C89 | TT_C99 | TT_CC65 },
137 { "while", TOK_WHILE, TT_C89 | TT_C99 | TT_CC65 },
139 #define KEY_COUNT (sizeof (Keywords) / sizeof (Keywords [0]))
143 /* Stuff for determining the type of an integer constant */
147 #define IT_ULONG 0x08
151 /*****************************************************************************/
153 /*****************************************************************************/
157 static int CmpKey (const void* Key, const void* Elem)
158 /* Compare function for bsearch */
160 return strcmp ((const char*) Key, ((const struct Keyword*) Elem)->Key);
165 static token_t FindKey (const char* Key)
166 /* Find a keyword and return the token. Return IDENT if the token is not a
171 K = bsearch (Key, Keywords, KEY_COUNT, sizeof (Keywords [0]), CmpKey);
172 if (K && (K->Std & (0x01 << IS_Get (&Standard))) != 0) {
181 static int SkipWhite (void)
182 /* Skip white space in the input stream, reading and preprocessing new lines
183 * if necessary. Return 0 if end of file is reached, return 1 otherwise.
187 while (CurC == '\0') {
188 if (NextLine () == 0) {
193 if (IsSpace (CurC)) {
203 int TokIsFuncSpec (const Token* T)
204 /* Return true if the token is a function specifier */
206 return (T->Tok == TOK_INLINE) || (T->Tok == TOK_FASTCALL) ||
207 (T->Tok == TOK_NEAR) || (T->Tok == TOK_FAR);
212 void SymName (char* S)
213 /* Read a symbol from the input stream. The first character must have been
214 * checked before calling this function. The buffer is expected to be at
215 * least of size MAX_IDENTLEN+1.
220 if (Len < MAX_IDENTLEN) {
225 } while (IsIdent (CurC) || IsDigit (CurC));
232 /* If a symbol follows, read it and return 1, otherwise return 0 */
234 if (IsIdent (CurC)) {
244 static void UnknownChar (char C)
245 /* Error message for unknown character */
247 Error ("Invalid input character with code %02X", C & 0xFF);
248 NextChar (); /* Skip */
253 static void SetTok (int tok)
254 /* Set NextTok.Tok and bump line ptr */
262 static int ParseChar (void)
263 /* Parse a character. Converts escape chars into character codes. */
268 /* Check for escape chars */
307 /* Hex character constant */
308 if (!IsXDigit (NextC)) {
309 Error ("\\x used with no following hex digits");
314 while (IsXDigit (NextC)) {
315 if ((C << 4) >= 256) {
317 Error ("Hex character constant out of range");
321 C = (C << 4) | HexVal (NextC);
338 while (IsODigit (NextC)) {
339 if ((C << 3) >= 256) {
341 Error ("Octal character constant out of range");
345 C = (C << 3) | HexVal (NextC);
351 Error ("Illegal character constant");
353 /* Try to do error recovery, otherwise the compiler will spit
354 * out thousands of errors in this place and abort.
356 if (CurC != '\'' && CurC != '\0') {
357 while (NextC != '\'' && NextC != '\"' && NextC != '\0') {
367 /* Skip the character read */
370 /* Do correct sign extension */
371 return SignExtendChar (C);
376 static void CharConst (void)
377 /* Parse a character constant. */
387 /* Check for closing quote */
389 Error ("`\'' expected");
395 /* Setup values and attributes */
396 NextTok.Tok = TOK_CCONST;
398 /* Translate into target charset */
399 NextTok.IVal = SignExtendChar (TgtTranslateChar (C));
401 /* Character constants have type int */
402 NextTok.Type = type_int;
407 static void StringConst (void)
408 /* Parse a quoted string */
411 StrBuf S = AUTO_STRBUF_INITIALIZER;
413 /* Concatenate strings. If at least one of the concenated strings is a wide
414 * character literal, the whole string is a wide char literal, otherwise
415 * it's a normal string literal.
419 /* Check if this is a normal or a wide char string */
420 if (CurC == 'L' && NextC == '\"') {
421 /* Wide character literal */
422 NextTok.Tok = TOK_WCSCONST;
425 } else if (CurC == '\"') {
426 /* Skip the quote char */
433 /* Read until end of string */
434 while (CurC != '\"') {
436 Error ("Unexpected newline");
439 SB_AppendChar (&S, ParseChar ());
442 /* Skip closing quote char if there was one */
445 /* Skip white space, read new input */
450 /* Terminate the string */
451 SB_AppendChar (&S, '\0');
453 /* Add the whole string to the literal pool */
454 NextTok.IVal = AddLiteralStr (&S);
455 NextTok.Tok = TOK_SCONST;
457 /* Free the buffer */
463 static void NumericConst (void)
464 /* Parse a numeric constant */
466 unsigned Base; /* Temporary number base */
467 unsigned Prefix; /* Base according to prefix */
468 StrBuf S = STATIC_STRBUF_INITIALIZER;
472 unsigned long IVal; /* Value */
474 /* Check for a leading hex or octal prefix and determine the possible
478 /* Gobble 0 and examine next char */
480 if (toupper (CurC) == 'X') {
482 NextChar (); /* gobble "x" */
484 Base = 10; /* Assume 10 for now - see below */
485 Prefix = 8; /* Actual prefix says octal */
491 /* Because floating point numbers don't have octal prefixes (a number
492 * with a leading zero is decimal), we first have to read the number
493 * before converting it, so we can determine if it's a float or an
496 while (IsXDigit (CurC) && HexVal (CurC) < Base) {
497 SB_AppendChar (&S, CurC);
502 /* The following character tells us if we have an integer or floating
503 * point constant. Note: Hexadecimal floating point constants aren't
506 IsFloat = (CurC == '.' ||
507 (Base == 10 && toupper (CurC) == 'E') ||
508 (Base == 16 && toupper (CurC) == 'P' && IS_Get (&Standard) >= STD_C99));
510 /* If we don't have a floating point type, an octal prefix results in an
513 if (!IsFloat && Prefix == 8) {
517 /* Since we do now know the correct base, convert the remembered input
522 while ((C = SB_Get (&S)) != '\0') {
523 DigitVal = HexVal (C);
524 if (DigitVal >= Base) {
525 Error ("Numeric constant contains digits beyond the radix");
527 IVal = (IVal * Base) + DigitVal;
530 /* We don't need the string buffer any longer */
533 /* Distinguish between integer and floating point constants */
539 /* Check for a suffix and determine the possible types */
541 if (toupper (CurC) == 'U') {
544 if (toupper (CurC) != 'L') {
545 Types = IT_UINT | IT_ULONG;
550 } else if (toupper (CurC) == 'L') {
553 if (toupper (CurC) != 'U') {
554 Types = IT_LONG | IT_ULONG;
562 /* Decimal constants are of any type but uint */
563 Types = IT_INT | IT_LONG | IT_ULONG;
565 /* Octal or hex constants are of any type */
566 Types = IT_INT | IT_UINT | IT_LONG | IT_ULONG;
570 /* Check the range to determine the type */
572 /* Out of range for int */
574 /* If the value is in the range 0x8000..0xFFFF, unsigned int is not
575 * allowed, and we don't have a type specifying suffix, emit a
576 * warning, because the constant is of type long.
578 if (IVal <= 0xFFFF && (Types & IT_UINT) == 0 && !HaveSuffix) {
579 Warning ("Constant is long");
583 /* Out of range for unsigned int */
586 if (IVal > 0x7FFFFFFF) {
587 /* Out of range for long int */
591 /* Now set the type string to the smallest type in types */
592 if (Types & IT_INT) {
593 NextTok.Type = type_int;
594 } else if (Types & IT_UINT) {
595 NextTok.Type = type_uint;
596 } else if (Types & IT_LONG) {
597 NextTok.Type = type_long;
599 NextTok.Type = type_ulong;
602 /* Set the value and the token */
604 NextTok.Tok = TOK_ICONST;
609 Double FVal = FP_D_FromInt (IVal); /* Convert to double */
611 /* Check for a fractional part and read it */
619 /* Read fractional digits */
620 Scale = FP_D_Make (1.0);
621 while (IsXDigit (CurC) && (DigitVal = HexVal (CurC)) < Base) {
622 /* Get the value of this digit */
623 Double FracVal = FP_D_Div (FP_D_FromInt (DigitVal * Base), Scale);
624 /* Add it to the float value */
625 FVal = FP_D_Add (FVal, FracVal);
627 Scale = FP_D_Mul (Scale, FP_D_FromInt (DigitVal));
633 /* Check for an exponent and read it */
634 if ((Base == 16 && toupper (CurC) == 'F') ||
635 (Base == 10 && toupper (CurC) == 'E')) {
641 /* Skip the exponent notifier */
644 /* Read an optional sign */
649 } else if (CurC == '+') {
653 /* Read exponent digits. Since we support only 32 bit floats
654 * with a maximum exponent of +-/127, we read the exponent
655 * part as integer with up to 3 digits and drop the remainder.
656 * This avoids an overflow of Exp. The exponent is always
657 * decimal, even for hex float consts.
661 while (IsDigit (CurC)) {
663 Exp = Exp * 10 + HexVal (CurC);
668 /* Check for errors: We must have exponent digits, and not more
672 Error ("Floating constant exponent has no digits");
673 } else if (Digits > 3) {
674 Warning ("Floating constant exponent is too large");
677 /* Scale the exponent and adjust the value accordingly */
679 FVal = FP_D_Mul (FVal, FP_D_Make (pow (10, Exp)));
683 /* Check for a suffix and determine the type of the constant */
684 if (toupper (CurC) == 'F') {
686 NextTok.Type = type_float;
688 NextTok.Type = type_double;
691 /* Set the value and the token */
693 NextTok.Tok = TOK_FCONST;
700 void NextToken (void)
701 /* Get next token from input stream */
705 /* We have to skip white space here before shifting tokens, since the
706 * tokens and the current line info is invalid at startup and will get
707 * initialized by reading the first time from the file. Remember if
708 * we were at end of input and handle that later.
710 int GotEOF = (SkipWhite() == 0);
712 /* Current token is the lookahead token */
714 ReleaseLineInfo (CurTok.LI);
718 /* When reading the first time from the file, the line info in NextTok,
719 * which was copied to CurTok is invalid. Since the information from
720 * the token is used for error messages, we must make it valid.
722 if (CurTok.LI == 0) {
723 CurTok.LI = UseLineInfo (GetCurLineInfo ());
726 /* Remember the starting position of the next token */
727 NextTok.LI = UseLineInfo (GetCurLineInfo ());
729 /* Now handle end of input. */
731 /* End of file reached */
732 NextTok.Tok = TOK_CEOF;
736 /* Determine the next token from the lookahead */
737 if (IsDigit (CurC) || (CurC == '.' && IsDigit (NextC))) {
743 /* Check for wide character literals */
744 if (CurC == 'L' && NextC == '\"') {
749 /* Check for keywords and identifiers */
752 /* Check for a keyword */
753 if ((NextTok.Tok = FindKey (token)) != TOK_IDENT) {
754 /* Reserved word found */
757 /* No reserved word, check for special symbols */
758 if (token[0] == '_' && token[1] == '_') {
759 /* Special symbols */
760 if (strcmp (token+2, "FILE__") == 0) {
761 NextTok.IVal = AddLiteral (GetCurrentFile());
762 NextTok.Tok = TOK_SCONST;
764 } else if (strcmp (token+2, "LINE__") == 0) {
765 NextTok.Tok = TOK_ICONST;
766 NextTok.IVal = GetCurrentLine();
767 NextTok.Type = type_int;
769 } else if (strcmp (token+2, "func__") == 0) {
770 /* __func__ is only defined in functions */
772 NextTok.IVal = AddLiteral (F_GetFuncName (CurrentFunc));
773 NextTok.Tok = TOK_SCONST;
779 /* No reserved word but identifier */
780 strcpy (NextTok.Ident, token);
781 NextTok.Tok = TOK_IDENT;
785 /* Monstrous switch statement ahead... */
793 NextTok.Tok = TOK_BOOL_NOT;
804 SetTok (TOK_MOD_ASSIGN);
806 NextTok.Tok = TOK_MOD;
814 SetTok (TOK_BOOL_AND);
817 SetTok (TOK_AND_ASSIGN);
820 NextTok.Tok = TOK_AND;
839 SetTok (TOK_MUL_ASSIGN);
841 NextTok.Tok = TOK_STAR;
852 SetTok (TOK_PLUS_ASSIGN);
855 NextTok.Tok = TOK_PLUS;
870 SetTok (TOK_MINUS_ASSIGN);
873 SetTok (TOK_PTR_REF);
876 NextTok.Tok = TOK_MINUS;
885 SetTok (TOK_ELLIPSIS);
890 NextTok.Tok = TOK_DOT;
897 SetTok (TOK_DIV_ASSIGN);
899 NextTok.Tok = TOK_DIV;
920 SetTok (TOK_SHL_ASSIGN);
922 NextTok.Tok = TOK_SHL;
926 NextTok.Tok = TOK_LT;
935 NextTok.Tok = TOK_ASSIGN;
948 SetTok (TOK_SHR_ASSIGN);
950 NextTok.Tok = TOK_SHR;
954 NextTok.Tok = TOK_GT;
973 SetTok (TOK_XOR_ASSIGN);
975 NextTok.Tok = TOK_XOR;
987 SetTok (TOK_BOOL_OR);
990 SetTok (TOK_OR_ASSIGN);
993 NextTok.Tok = TOK_OR;
1014 void SkipTokens (const token_t* TokenList, unsigned TokenCount)
1015 /* Skip tokens until we reach TOK_CEOF or a token in the given token list.
1016 * This routine is used for error recovery.
1019 while (CurTok.Tok != TOK_CEOF) {
1021 /* Check if the current token is in the token list */
1023 for (I = 0; I < TokenCount; ++I) {
1024 if (CurTok.Tok == TokenList[I]) {
1025 /* Found a token in the list */
1030 /* Not in the list: Skip it */
1038 int Consume (token_t Token, const char* ErrorMsg)
1039 /* Eat token if it is the next in the input stream, otherwise print an error
1040 * message. Returns true if the token was found and false otherwise.
1043 if (CurTok.Tok == Token) {
1047 Error ("%s", ErrorMsg);
1054 int ConsumeColon (void)
1055 /* Check for a colon and skip it. */
1057 return Consume (TOK_COLON, "`:' expected");
1062 int ConsumeSemi (void)
1063 /* Check for a semicolon and skip it. */
1065 /* Try do be smart about typos... */
1066 if (CurTok.Tok == TOK_SEMI) {
1070 Error ("`;' expected");
1071 if (CurTok.Tok == TOK_COLON || CurTok.Tok == TOK_COMMA) {
1080 int ConsumeComma (void)
1081 /* Check for a comma and skip it. */
1083 /* Try do be smart about typos... */
1084 if (CurTok.Tok == TOK_COMMA) {
1088 Error ("`,' expected");
1089 if (CurTok.Tok == TOK_SEMI) {
1098 int ConsumeLParen (void)
1099 /* Check for a left parenthesis and skip it */
1101 return Consume (TOK_LPAREN, "`(' expected");
1106 int ConsumeRParen (void)
1107 /* Check for a right parenthesis and skip it */
1109 return Consume (TOK_RPAREN, "`)' expected");
1114 int ConsumeLBrack (void)
1115 /* Check for a left bracket and skip it */
1117 return Consume (TOK_LBRACK, "`[' expected");
1122 int ConsumeRBrack (void)
1123 /* Check for a right bracket and skip it */
1125 return Consume (TOK_RBRACK, "`]' expected");
1130 int ConsumeLCurly (void)
1131 /* Check for a left curly brace and skip it */
1133 return Consume (TOK_LCURLY, "`{' expected");
1138 int ConsumeRCurly (void)
1139 /* Check for a right curly brace and skip it */
1141 return Consume (TOK_RCURLY, "`}' expected");