1 /*****************************************************************************/
5 /* The scanner for the ca65 macroassembler */
9 /* (C) 1998-2012, 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 /*****************************************************************************/
66 /*****************************************************************************/
68 /*****************************************************************************/
72 /* Current input token incl. attributes */
73 Token CurTok = STATIC_TOKEN_INITIALIZER;
75 /* Struct to handle include files. */
76 typedef struct InputFile InputFile;
78 FILE* F; /* Input file descriptor */
79 FilePos Pos; /* Position in file */
80 token_t Tok; /* Last token */
81 int C; /* Last character */
82 StrBuf Line; /* The current input line */
83 int IncSearchPath; /* True if we've added a search path */
84 int BinSearchPath; /* True if we've added a search path */
85 InputFile* Next; /* Linked list of input files */
88 /* Struct to handle textual input data */
89 typedef struct InputData InputData;
91 char* Text; /* Pointer to the text data */
92 const char* Pos; /* Pointer to current position */
93 int Malloced; /* Memory was malloced */
94 token_t Tok; /* Last token */
95 int C; /* Last character */
96 InputData* Next; /* Linked list of input data */
99 /* Input source: Either file or data */
100 typedef struct CharSource CharSource;
102 /* Set of input functions */
103 typedef struct CharSourceFunctions CharSourceFunctions;
104 struct CharSourceFunctions {
105 void (*MarkStart) (CharSource*); /* Mark the start pos of a token */
106 void (*NextChar) (CharSource*); /* Read next char from input */
107 void (*Done) (CharSource*); /* Close input source */
110 /* Input source: Either file or data */
112 CharSource* Next; /* Linked list of char sources */
113 token_t Tok; /* Last token */
114 int C; /* Last character */
115 const CharSourceFunctions* Func; /* Pointer to function table */
117 InputFile File; /* File data */
118 InputData Data; /* Textual data */
122 /* Current input variables */
123 static CharSource* Source = 0; /* Current char source */
124 static unsigned FCount = 0; /* Count of input files */
125 static int C = 0; /* Current input character */
127 /* Force end of assembly */
130 /* List of dot keywords with the corresponding tokens */
132 const char* Key; /* MUST be first field */
137 { ".ADDR", TOK_ADDR },
138 { ".ALIGN", TOK_ALIGN },
139 { ".AND", TOK_BOOLAND },
140 { ".ASCIIZ", TOK_ASCIIZ },
141 { ".ASSERT", TOK_ASSERT },
142 { ".AUTOIMPORT", TOK_AUTOIMPORT },
143 { ".BANK", TOK_BANK },
144 { ".BANKBYTE", TOK_BANKBYTE },
145 { ".BANKBYTES", TOK_BANKBYTES },
146 { ".BITAND", TOK_AND },
147 { ".BITNOT", TOK_NOT },
148 { ".BITOR", TOK_OR },
149 { ".BITXOR", TOK_XOR },
150 { ".BLANK", TOK_BLANK },
152 { ".BYT", TOK_BYTE },
153 { ".BYTE", TOK_BYTE },
154 { ".CASE", TOK_CASE },
155 { ".CHARMAP", TOK_CHARMAP },
156 { ".CODE", TOK_CODE },
157 { ".CONCAT", TOK_CONCAT },
158 { ".CONDES", TOK_CONDES },
159 { ".CONST", TOK_CONST },
160 { ".CONSTRUCTOR", TOK_CONSTRUCTOR },
162 { ".DATA", TOK_DATA },
164 { ".DBYT", TOK_DBYT },
165 { ".DEBUGINFO", TOK_DEBUGINFO },
166 { ".DEF", TOK_DEFINED },
167 { ".DEFINE", TOK_DEFINE },
168 { ".DEFINED", TOK_DEFINED },
169 { ".DELMAC", TOK_DELMAC },
170 { ".DELMACRO", TOK_DELMAC },
171 { ".DESTRUCTOR", TOK_DESTRUCTOR },
172 { ".DWORD", TOK_DWORD },
173 { ".ELSE", TOK_ELSE },
174 { ".ELSEIF", TOK_ELSEIF },
176 { ".ENDENUM", TOK_ENDENUM },
177 { ".ENDIF", TOK_ENDIF },
178 { ".ENDMAC", TOK_ENDMACRO },
179 { ".ENDMACRO", TOK_ENDMACRO },
180 { ".ENDPROC", TOK_ENDPROC },
181 { ".ENDREP", TOK_ENDREP },
182 { ".ENDREPEAT", TOK_ENDREP },
183 { ".ENDSCOPE", TOK_ENDSCOPE },
184 { ".ENDSTRUCT", TOK_ENDSTRUCT },
185 { ".ENDUNION", TOK_ENDUNION },
186 { ".ENUM", TOK_ENUM },
187 { ".ERROR", TOK_ERROR },
188 { ".EXITMAC", TOK_EXITMACRO },
189 { ".EXITMACRO", TOK_EXITMACRO },
190 { ".EXPORT", TOK_EXPORT },
191 { ".EXPORTZP", TOK_EXPORTZP },
192 { ".FARADDR", TOK_FARADDR },
193 { ".FATAL", TOK_FATAL },
194 { ".FEATURE", TOK_FEATURE },
195 { ".FILEOPT", TOK_FILEOPT },
196 { ".FOPT", TOK_FILEOPT },
197 { ".FORCEIMPORT", TOK_FORCEIMPORT },
198 { ".FORCEWORD", TOK_FORCEWORD },
199 { ".GLOBAL", TOK_GLOBAL },
200 { ".GLOBALZP", TOK_GLOBALZP },
201 { ".HIBYTE", TOK_HIBYTE },
202 { ".HIBYTES", TOK_HIBYTES },
203 { ".HIWORD", TOK_HIWORD },
206 { ".IDENT", TOK_MAKEIDENT },
208 { ".IFBLANK", TOK_IFBLANK },
209 { ".IFCONST", TOK_IFCONST },
210 { ".IFDEF", TOK_IFDEF },
211 { ".IFNBLANK", TOK_IFNBLANK },
212 { ".IFNCONST", TOK_IFNCONST },
213 { ".IFNDEF", TOK_IFNDEF },
214 { ".IFNREF", TOK_IFNREF },
215 { ".IFP02", TOK_IFP02 },
216 { ".IFP816", TOK_IFP816 },
217 { ".IFPC02", TOK_IFPC02 },
218 { ".IFPSC02", TOK_IFPSC02 },
219 { ".IFREF", TOK_IFREF },
220 { ".IMPORT", TOK_IMPORT },
221 { ".IMPORTZP", TOK_IMPORTZP },
222 { ".INCBIN", TOK_INCBIN },
223 { ".INCLUDE", TOK_INCLUDE },
224 { ".INTERRUPTOR", TOK_INTERRUPTOR },
225 { ".LEFT", TOK_LEFT },
226 { ".LINECONT", TOK_LINECONT },
227 { ".LIST", TOK_LIST },
228 { ".LISTBYTES", TOK_LISTBYTES },
229 { ".LOBYTE", TOK_LOBYTE },
230 { ".LOBYTES", TOK_LOBYTES },
231 { ".LOCAL", TOK_LOCAL },
232 { ".LOCALCHAR", TOK_LOCALCHAR },
233 { ".LOWORD", TOK_LOWORD },
234 { ".MAC", TOK_MACRO },
235 { ".MACPACK", TOK_MACPACK },
236 { ".MACRO", TOK_MACRO },
237 { ".MATCH", TOK_MATCH },
242 { ".NOT", TOK_BOOLNOT },
243 { ".NULL", TOK_NULL },
244 { ".OR", TOK_BOOLOR },
248 { ".P816", TOK_P816 },
249 { ".PAGELEN", TOK_PAGELENGTH },
250 { ".PAGELENGTH", TOK_PAGELENGTH },
251 { ".PARAMCOUNT", TOK_PARAMCOUNT },
252 { ".PC02", TOK_PC02 },
253 { ".POPCPU", TOK_POPCPU },
254 { ".POPSEG", TOK_POPSEG },
255 { ".PROC", TOK_PROC },
256 { ".PSC02", TOK_PSC02 },
257 { ".PUSHCPU", TOK_PUSHCPU },
258 { ".PUSHSEG", TOK_PUSHSEG },
259 { ".REF", TOK_REFERENCED },
260 { ".REFERENCED", TOK_REFERENCED },
261 { ".RELOC", TOK_RELOC },
262 { ".REPEAT", TOK_REPEAT },
264 { ".RIGHT", TOK_RIGHT },
265 { ".RODATA", TOK_RODATA },
266 { ".SCOPE", TOK_SCOPE },
267 { ".SEGMENT", TOK_SEGMENT },
269 { ".SETCPU", TOK_SETCPU },
272 { ".SIZEOF", TOK_SIZEOF },
273 { ".SMART", TOK_SMART },
274 { ".SPRINTF", TOK_SPRINTF },
275 { ".STRAT", TOK_STRAT },
276 { ".STRING", TOK_STRING },
277 { ".STRLEN", TOK_STRLEN },
278 { ".STRUCT", TOK_STRUCT },
279 { ".SUNPLUS", TOK_SUNPLUS },
281 { ".TCOUNT", TOK_TCOUNT },
282 { ".TIME", TOK_TIME },
283 { ".UNDEF", TOK_UNDEF },
284 { ".UNDEFINE", TOK_UNDEF },
285 { ".UNION", TOK_UNION },
286 { ".VERSION", TOK_VERSION },
287 { ".WARNING", TOK_WARNING },
288 { ".WORD", TOK_WORD },
289 { ".XMATCH", TOK_XMATCH },
290 { ".XOR", TOK_BOOLXOR },
291 { ".ZEROPAGE", TOK_ZEROPAGE },
296 /*****************************************************************************/
297 /* CharSource functions */
298 /*****************************************************************************/
302 static void UseCharSource (CharSource* S)
303 /* Initialize a new input source and start to use it. */
305 /* Remember the current input char and token */
309 /* Use the new input source */
313 /* Read the first character from the new file */
314 S->Func->NextChar (S);
316 /* Setup the next token so it will be skipped on the next call to
319 CurTok.Tok = TOK_SEP;
324 static void DoneCharSource (void)
325 /* Close the top level character source */
329 /* First, call the type specific function */
330 Source->Func->Done (Source);
332 /* Restore the old token */
333 CurTok.Tok = Source->Tok;
336 /* Remember the last stacked input source */
339 /* Delete the top level one ... */
342 /* ... and use the one before */
348 /*****************************************************************************/
349 /* InputFile functions */
350 /*****************************************************************************/
354 static void IFMarkStart (CharSource* S)
355 /* Mark the start of the next token */
357 CurTok.Pos = S->V.File.Pos;
362 static void IFNextChar (CharSource* S)
363 /* Read the next character from the input file */
365 /* Check for end of line, read the next line if needed */
366 while (SB_GetIndex (&S->V.File.Line) >= SB_GetLen (&S->V.File.Line)) {
370 /* End of current line reached, read next line */
371 SB_Clear (&S->V.File.Line);
374 int N = fgetc (S->V.File.F);
376 /* End of file. Accept files without a newline at the end */
377 if (SB_NotEmpty (&S->V.File.Line)) {
381 /* No more data - add an empty line to the listing. This
382 * is a small hack needed to keep the PC output in sync.
384 NewListingLine (&EmptyStrBuf, S->V.File.Pos.Name, FCount);
388 /* Check for end of line */
389 } else if (N == '\n') {
394 /* Collect other stuff */
397 /* Append data to line */
398 SB_AppendChar (&S->V.File.Line, N);
404 /* If we come here, we have a new input line. To avoid problems
405 * with strange line terminators, remove all whitespace from the
406 * end of the line, the add a single newline.
408 Len = SB_GetLen (&S->V.File.Line);
409 while (Len > 0 && IsSpace (SB_AtUnchecked (&S->V.File.Line, Len-1))) {
412 SB_Drop (&S->V.File.Line, SB_GetLen (&S->V.File.Line) - Len);
413 SB_AppendChar (&S->V.File.Line, '\n');
415 /* Terminate the string buffer */
416 SB_Terminate (&S->V.File.Line);
419 S->V.File.Pos.Line++;
421 /* Remember the new line for the listing */
422 NewListingLine (&S->V.File.Line, S->V.File.Pos.Name, FCount);
426 /* Set the column pointer */
427 S->V.File.Pos.Col = SB_GetIndex (&S->V.File.Line);
429 /* Return the next character from the buffer */
430 C = SB_Get (&S->V.File.Line);
435 void IFDone (CharSource* S)
436 /* Close the current input file */
438 /* We're at the end of an include file. Check if we have any
439 * open .IFs, or any open token lists in this file. This
440 * enforcement is artificial, using conditionals that start
441 * in one file and end in another are uncommon, and don't
442 * allowing these things will help finding errors.
446 /* If we've added search paths for this file, remove them */
447 if (S->V.File.IncSearchPath) {
448 PopSearchPath (IncSearchPath);
450 if (S->V.File.BinSearchPath) {
451 PopSearchPath (BinSearchPath);
454 /* Free the line buffer */
455 SB_Done (&S->V.File.Line);
457 /* Close the input file and decrement the file count. We will ignore
458 * errors here, since we were just reading from the file.
460 (void) fclose (S->V.File.F);
466 /* Set of input file handling functions */
467 static const CharSourceFunctions IFFunc = {
475 int NewInputFile (const char* Name)
476 /* Open a new input file. Returns true if the file could be successfully opened
477 * and false otherwise.
480 int RetCode = 0; /* Return code. Assume an error. */
484 StrBuf NameBuf; /* No need to initialize */
485 StrBuf Path = AUTO_STRBUF_INITIALIZER;
490 /* If this is the main file, just try to open it. If it's an include file,
491 * search for it using the include path list.
495 F = fopen (Name, "r");
497 Fatal ("Cannot open input file `%s': %s", Name, strerror (errno));
500 /* We are on include level. Search for the file in the include
503 PathName = SearchFile (IncSearchPath, Name);
504 if (PathName == 0 || (F = fopen (PathName, "r")) == 0) {
505 /* Not found or cannot open, print an error and bail out */
506 Error ("Cannot open include file `%s': %s", Name, strerror (errno));
510 /* Use the path name from now on */
514 /* Stat the file and remember the values. There a race condition here,
515 * since we cannot use fileno() (non standard identifier in standard
516 * header file), and therefore not fstat. When using stat with the
517 * file name, there's a risk that the file was deleted and recreated
518 * while it was open. Since mtime and size are only used to check
519 * if a file has changed in the debugger, we will ignore this problem
522 if (FileStat (Name, &Buf) != 0) {
523 Fatal ("Cannot stat input file `%s': %s", Name, strerror (errno));
526 /* Add the file to the input file table and remember the index */
527 FileIdx = AddFile (SB_InitFromString (&NameBuf, Name),
528 (FCount == 0)? FT_MAIN : FT_INCLUDE,
529 Buf.st_size, Buf.st_mtime);
531 /* Create a new input source variable and initialize it */
532 S = xmalloc (sizeof (*S));
535 S->V.File.Pos.Line = 0;
536 S->V.File.Pos.Col = 0;
537 S->V.File.Pos.Name = FileIdx;
538 SB_Init (&S->V.File.Line);
540 /* Push the path for this file onto the include search lists */
541 SB_CopyBuf (&Path, Name, FindName (Name) - Name);
542 SB_Terminate (&Path);
543 S->V.File.IncSearchPath = PushSearchPath (IncSearchPath, SB_GetConstBuf (&Path));
544 S->V.File.BinSearchPath = PushSearchPath (BinSearchPath, SB_GetConstBuf (&Path));
547 /* Count active input files */
550 /* Use this input source */
553 /* File successfully opened */
557 /* Free an allocated name buffer */
560 /* Return the success code */
566 /*****************************************************************************/
567 /* InputData functions */
568 /*****************************************************************************/
572 static void IDMarkStart (CharSource* S attribute ((unused)))
573 /* Mark the start of the next token */
575 /* Nothing to do here */
580 static void IDNextChar (CharSource* S)
581 /* Read the next character from the input text */
583 C = *S->V.Data.Pos++;
585 /* End of input data */
593 void IDDone (CharSource* S)
594 /* Close the current input data */
596 /* Cleanup the current stuff */
597 if (S->V.Data.Malloced) {
598 xfree (S->V.Data.Text);
604 /* Set of input data handling functions */
605 static const CharSourceFunctions IDFunc = {
613 void NewInputData (char* Text, int Malloced)
614 /* Add a chunk of input data to the input stream */
618 /* Create a new input source variable and initialize it */
619 S = xmalloc (sizeof (*S));
621 S->V.Data.Text = Text;
622 S->V.Data.Pos = Text;
623 S->V.Data.Malloced = Malloced;
625 /* Use this input source */
631 /*****************************************************************************/
632 /* Character classification functions */
633 /*****************************************************************************/
638 /* Return true if the character is a valid character for an identifier */
640 return IsAlNum (C) ||
642 (C == '@' && AtInIdents) ||
643 (C == '$' && DollarInIdents);
648 int IsIdStart (int C)
649 /* Return true if the character may start an identifier */
651 return IsAlpha (C) || C == '_';
656 /*****************************************************************************/
658 /*****************************************************************************/
662 static unsigned DigitVal (unsigned char C)
663 /* Convert a digit into it's numerical representation */
668 return toupper (C) - 'A' + 10;
674 static void NextChar (void)
675 /* Read the next character from the input file */
677 Source->Func->NextChar (Source);
682 void LocaseSVal (void)
683 /* Make SVal lower case */
685 SB_ToLower (&CurTok.SVal);
690 void UpcaseSVal (void)
691 /* Make SVal upper case */
693 SB_ToUpper (&CurTok.SVal);
698 static int CmpDotKeyword (const void* K1, const void* K2)
699 /* Compare function for the dot keyword search */
701 return strcmp (((struct DotKeyword*)K1)->Key, ((struct DotKeyword*)K2)->Key);
706 static token_t FindDotKeyword (void)
707 /* Find the dot keyword in SVal. Return the corresponding token if found,
708 * return TOK_NONE if not found.
712 struct DotKeyword* R;
715 K.Key = SB_GetConstBuf (&CurTok.SVal);
718 /* If we aren't in ignore case mode, we have to uppercase the keyword */
723 /* Search for the keyword */
724 R = bsearch (&K, DotKeywords, sizeof (DotKeywords) / sizeof (DotKeywords [0]),
725 sizeof (DotKeywords [0]), CmpDotKeyword);
735 static void ReadIdent (void)
736 /* Read an identifier from the current input position into Ident. Filling SVal
737 * starts at the current position with the next character in C. It is assumed
738 * that any characters already filled in are ok, and the character in C is
742 /* Read the identifier */
744 SB_AppendChar (&CurTok.SVal, C);
746 } while (IsIdChar (C));
747 SB_Terminate (&CurTok.SVal);
749 /* If we should ignore case, convert the identifier to upper case */
757 static void ReadStringConst (int StringTerm)
758 /* Read a string constant into SVal. */
760 /* Skip the leading string terminator */
763 /* Read the string */
765 if (C == StringTerm) {
768 if (C == '\n' || C == EOF) {
769 Error ("Newline in string constant");
773 /* Append the char to the string */
774 SB_AppendChar (&CurTok.SVal, C);
776 /* Skip the character */
780 /* Skip the trailing terminator */
783 /* Terminate the string */
784 SB_Terminate (&CurTok.SVal);
789 static int Sweet16Reg (const StrBuf* Id)
790 /* Check if the given identifier is a sweet16 register. Return -1 if this is
791 * not the case, return the register number otherwise.
797 if (SB_GetLen (Id) < 2) {
800 if (toupper (SB_AtUnchecked (Id, 0)) != 'R') {
803 if (!IsDigit (SB_AtUnchecked (Id, 1))) {
807 if (sscanf (SB_GetConstBuf (Id)+1, "%u%c", &RegNum, &Check) != 1 || RegNum > 15) {
808 /* Invalid register */
812 /* The register number is valid */
818 void NextRawTok (void)
819 /* Read the next raw token from the input stream */
823 /* If we've a forced end of assembly, don't read further */
825 CurTok.Tok = TOK_EOF;
830 /* Check if we have tokens from another input source */
831 if (InputFromStack ()) {
832 if (CurTok.Tok == TOK_IDENT && (M = FindDefine (&CurTok.SVal)) != 0) {
833 /* This is a define style macro - expand it */
841 /* Skip whitespace, remember if we had some */
842 if ((CurTok.WS = IsBlank (C)) != 0) {
845 } while (IsBlank (C));
848 /* Mark the file position of the next token */
849 Source->Func->MarkStart (Source);
851 /* Clear the string attribute */
852 SB_Clear (&CurTok.SVal);
854 /* Generate line info for the current token */
857 /* Hex number or PC symbol? */
861 /* Hex digit must follow or DollarIsPC must be enabled */
867 Error ("Hexadecimal digit expected");
871 /* Read the number */
873 while (IsXDigit (C)) {
874 if (CurTok.IVal & 0xF0000000) {
875 Error ("Overflow in hexadecimal number");
878 CurTok.IVal = (CurTok.IVal << 4) + DigitVal (C);
882 /* This is an integer constant */
883 CurTok.Tok = TOK_INTCON;
891 /* 0 or 1 must follow */
893 Error ("Binary digit expected");
896 /* Read the number */
898 while (IsBDigit (C)) {
899 if (CurTok.IVal & 0x80000000) {
900 Error ("Overflow in binary number");
903 CurTok.IVal = (CurTok.IVal << 1) + DigitVal (C);
907 /* This is an integer constant */
908 CurTok.Tok = TOK_INTCON;
922 /* Ignore leading zeros */
927 /* Read the number into Buf counting the digits */
929 while (IsXDigit (C)) {
931 /* Buf is big enough to allow any decimal and hex number to
932 * overflow, so ignore excess digits here, they will be detected
933 * when we convert the value.
935 if (Digits < sizeof (Buf)) {
942 /* Allow zilog/intel style hex numbers with a 'h' suffix */
943 if (C == 'h' || C == 'H') {
946 Max = 0xFFFFFFFFUL / 16;
949 Max = 0xFFFFFFFFUL / 10;
952 /* Convert the number using the given base */
954 for (I = 0; I < Digits; ++I) {
955 if (CurTok.IVal > Max) {
956 Error ("Number out of range");
960 DVal = DigitVal (Buf[I]);
962 Error ("Invalid digits in number");
966 CurTok.IVal = (CurTok.IVal * Base) + DVal;
969 /* This is an integer constant */
970 CurTok.Tok = TOK_INTCON;
974 /* Control command? */
977 /* Remember and skip the dot */
980 /* Check if it's just a dot */
981 if (!IsIdStart (C)) {
984 CurTok.Tok = TOK_DOT;
988 /* Read the remainder of the identifier */
989 SB_AppendChar (&CurTok.SVal, '.');
992 /* Dot keyword, search for it */
993 CurTok.Tok = FindDotKeyword ();
994 if (CurTok.Tok == TOK_NONE) {
997 if (!LeadingDotInIdents) {
998 /* Invalid pseudo instruction */
999 Error ("`%m%p' is not a recognized control command", &CurTok.SVal);
1003 /* An identifier with a dot. Check if it's a define style
1006 if ((M = FindDefine (&CurTok.SVal)) != 0) {
1007 /* This is a define style macro - expand it */
1012 /* Just an identifier with a dot */
1013 CurTok.Tok = TOK_IDENT;
1020 /* Indirect op for sweet16 cpu. Must check this before checking for local
1021 * symbols, because these may also use the '@' symbol.
1023 if (CPU == CPU_SWEET16 && C == '@') {
1025 CurTok.Tok = TOK_AT;
1030 if (C == LocalStart) {
1032 /* Read the identifier. */
1035 /* Start character alone is not enough */
1036 if (SB_GetLen (&CurTok.SVal) == 1) {
1037 Error ("Invalid cheap local symbol");
1041 /* A local identifier */
1042 CurTok.Tok = TOK_LOCAL_IDENT;
1047 /* Identifier or keyword? */
1048 if (IsIdStart (C)) {
1050 /* Read the identifier */
1053 /* Check for special names. Bail out if we have identified the type of
1054 * the token. Go on if the token is an identifier.
1056 if (SB_GetLen (&CurTok.SVal) == 1) {
1057 switch (toupper (SB_AtUnchecked (&CurTok.SVal, 0))) {
1062 CurTok.Tok = TOK_OVERRIDE_ABS;
1071 CurTok.Tok = TOK_OVERRIDE_FAR;
1077 if (CPU == CPU_65816) {
1094 CurTok.Tok = TOK_OVERRIDE_ZP;
1103 } else if (CPU == CPU_SWEET16 &&
1104 (CurTok.IVal = Sweet16Reg (&CurTok.SVal)) >= 0) {
1106 /* A sweet16 register number in sweet16 mode */
1107 CurTok.Tok = TOK_REG;
1112 /* Check for define style macro */
1113 if ((M = FindDefine (&CurTok.SVal)) != 0) {
1114 /* Macro - expand it */
1119 CurTok.Tok = TOK_IDENT;
1124 /* Ok, let's do the switch */
1130 CurTok.Tok = TOK_PLUS;
1135 CurTok.Tok = TOK_MINUS;
1141 CurTok.Tok = TOK_DIV;
1142 } else if (CComments) {
1143 /* Remember the position, then skip the '*' */
1144 Collection LineInfos = STATIC_COLLECTION_INITIALIZER;
1145 GetFullLineInfo (&LineInfos);
1150 LIError (&LineInfos, "Unterminated comment");
1151 ReleaseFullLineInfo (&LineInfos);
1152 DoneCollection (&LineInfos);
1160 ReleaseFullLineInfo (&LineInfos);
1161 DoneCollection (&LineInfos);
1168 CurTok.Tok = TOK_MUL;
1173 CurTok.Tok = TOK_XOR;
1180 CurTok.Tok = TOK_BOOLAND;
1182 CurTok.Tok = TOK_AND;
1190 CurTok.Tok = TOK_BOOLOR;
1192 CurTok.Tok = TOK_OR;
1202 CurTok.Tok = TOK_NAMESPACE;
1211 CurTok.Tok = TOK_ULABEL;
1220 CurTok.Tok = TOK_ULABEL;
1225 CurTok.Tok = TOK_ASSIGN;
1229 CurTok.Tok = TOK_COLON;
1236 CurTok.Tok = TOK_COMMA;
1241 while (C != '\n' && C != EOF) {
1248 CurTok.Tok = TOK_HASH;
1253 CurTok.Tok = TOK_LPAREN;
1258 CurTok.Tok = TOK_RPAREN;
1263 CurTok.Tok = TOK_LBRACK;
1268 CurTok.Tok = TOK_RBRACK;
1273 CurTok.Tok = TOK_LCURLY;
1278 CurTok.Tok = TOK_RCURLY;
1285 CurTok.Tok = TOK_LE;
1286 } else if (C == '<') {
1288 CurTok.Tok = TOK_SHL;
1289 } else if (C == '>') {
1291 CurTok.Tok = TOK_NE;
1293 CurTok.Tok = TOK_LT;
1299 CurTok.Tok = TOK_EQ;
1304 CurTok.Tok = TOK_BOOLNOT;
1311 CurTok.Tok = TOK_GE;
1312 } else if (C == '>') {
1314 CurTok.Tok = TOK_SHR;
1316 CurTok.Tok = TOK_GT;
1322 CurTok.Tok = TOK_NOT;
1326 /* Hack: If we allow ' as terminating character for strings, read
1327 * the following stuff as a string, and check for a one character
1330 if (LooseStringTerm) {
1331 ReadStringConst ('\'');
1332 if (SB_GetLen (&CurTok.SVal) == 1) {
1333 CurTok.IVal = SB_AtUnchecked (&CurTok.SVal, 0);
1334 CurTok.Tok = TOK_CHARCON;
1336 CurTok.Tok = TOK_STRCON;
1339 /* Always a character constant */
1341 if (C == EOF || IsControl (C)) {
1342 Error ("Illegal character constant");
1346 CurTok.Tok = TOK_CHARCON;
1349 if (!MissingCharTerm) {
1350 Error ("Illegal character constant");
1359 ReadStringConst ('\"');
1360 CurTok.Tok = TOK_STRCON;
1364 /* Line continuation? */
1368 /* Handle as white space */
1378 CurTok.Tok = TOK_SEP;
1383 /* In case of the main file, do not close it, but return EOF. */
1384 if (Source && Source->Next) {
1388 CurTok.Tok = TOK_EOF;
1393 /* If we go here, we could not identify the current character. Skip it
1396 Error ("Invalid input character: 0x%02X", C & 0xFF);
1403 int GetSubKey (const char** Keys, unsigned Count)
1404 /* Search for a subkey in a table of keywords. The current token must be an
1405 * identifier and all keys must be in upper case. The identifier will be
1406 * uppercased in the process. The function returns the index of the keyword,
1407 * or -1 if the keyword was not found.
1412 /* Must have an identifier */
1413 PRECONDITION (CurTok.Tok == TOK_IDENT);
1415 /* If we aren't in ignore case mode, we have to uppercase the identifier */
1420 /* Do a linear search (a binary search is not worth the effort) */
1421 for (I = 0; I < Count; ++I) {
1422 if (SB_CompareStr (&CurTok.SVal, Keys [I]) == 0) {
1434 unsigned char ParseAddrSize (void)
1435 /* Check if the next token is a keyword that denotes an address size specifier.
1436 * If so, return the corresponding address size constant, otherwise output an
1437 * error message and return ADDR_SIZE_DEFAULT.
1440 unsigned char AddrSize;
1442 /* Check for an identifier */
1443 if (CurTok.Tok != TOK_IDENT) {
1444 Error ("Address size specifier expected");
1445 return ADDR_SIZE_DEFAULT;
1448 /* Convert the attribute */
1449 AddrSize = AddrSizeFromStr (SB_GetConstBuf (&CurTok.SVal));
1450 if (AddrSize == ADDR_SIZE_INVALID) {
1451 Error ("Address size specifier expected");
1452 AddrSize = ADDR_SIZE_DEFAULT;
1461 void InitScanner (const char* InFile)
1462 /* Initialize the scanner, open the given input file */
1464 /* Open the input file */
1465 NewInputFile (InFile);
1470 void DoneScanner (void)
1471 /* Release scanner resources */