1 /*****************************************************************************/
5 /* The scanner for the ca65 macroassembler */
9 /* (C) 1998-2013, 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 },
280 { ".TCOUNT", TOK_TCOUNT },
281 { ".TIME", TOK_TIME },
282 { ".UNDEF", TOK_UNDEF },
283 { ".UNDEFINE", TOK_UNDEF },
284 { ".UNION", TOK_UNION },
285 { ".VERSION", TOK_VERSION },
286 { ".WARNING", TOK_WARNING },
287 { ".WORD", TOK_WORD },
288 { ".XMATCH", TOK_XMATCH },
289 { ".XOR", TOK_BOOLXOR },
290 { ".ZEROPAGE", TOK_ZEROPAGE },
295 /*****************************************************************************/
296 /* CharSource functions */
297 /*****************************************************************************/
301 static void UseCharSource (CharSource* S)
302 /* Initialize a new input source and start to use it. */
304 /* Remember the current input char and token */
308 /* Use the new input source */
312 /* Read the first character from the new file */
313 S->Func->NextChar (S);
315 /* Setup the next token so it will be skipped on the next call to
318 CurTok.Tok = TOK_SEP;
323 static void DoneCharSource (void)
324 /* Close the top level character source */
328 /* First, call the type specific function */
329 Source->Func->Done (Source);
331 /* Restore the old token */
332 CurTok.Tok = Source->Tok;
335 /* Remember the last stacked input source */
338 /* Delete the top level one ... */
341 /* ... and use the one before */
347 /*****************************************************************************/
348 /* InputFile functions */
349 /*****************************************************************************/
353 static void IFMarkStart (CharSource* S)
354 /* Mark the start of the next token */
356 CurTok.Pos = S->V.File.Pos;
361 static void IFNextChar (CharSource* S)
362 /* Read the next character from the input file */
364 /* Check for end of line, read the next line if needed */
365 while (SB_GetIndex (&S->V.File.Line) >= SB_GetLen (&S->V.File.Line)) {
369 /* End of current line reached, read next line */
370 SB_Clear (&S->V.File.Line);
373 int N = fgetc (S->V.File.F);
375 /* End of file. Accept files without a newline at the end */
376 if (SB_NotEmpty (&S->V.File.Line)) {
380 /* No more data - add an empty line to the listing. This
381 * is a small hack needed to keep the PC output in sync.
383 NewListingLine (&EmptyStrBuf, S->V.File.Pos.Name, FCount);
387 /* Check for end of line */
388 } else if (N == '\n') {
393 /* Collect other stuff */
396 /* Append data to line */
397 SB_AppendChar (&S->V.File.Line, N);
403 /* If we come here, we have a new input line. To avoid problems
404 * with strange line terminators, remove all whitespace from the
405 * end of the line, the add a single newline.
407 Len = SB_GetLen (&S->V.File.Line);
408 while (Len > 0 && IsSpace (SB_AtUnchecked (&S->V.File.Line, Len-1))) {
411 SB_Drop (&S->V.File.Line, SB_GetLen (&S->V.File.Line) - Len);
412 SB_AppendChar (&S->V.File.Line, '\n');
414 /* Terminate the string buffer */
415 SB_Terminate (&S->V.File.Line);
418 S->V.File.Pos.Line++;
420 /* Remember the new line for the listing */
421 NewListingLine (&S->V.File.Line, S->V.File.Pos.Name, FCount);
425 /* Set the column pointer */
426 S->V.File.Pos.Col = SB_GetIndex (&S->V.File.Line);
428 /* Return the next character from the buffer */
429 C = SB_Get (&S->V.File.Line);
434 void IFDone (CharSource* S)
435 /* Close the current input file */
437 /* We're at the end of an include file. Check if we have any
438 * open .IFs, or any open token lists in this file. This
439 * enforcement is artificial, using conditionals that start
440 * in one file and end in another are uncommon, and don't
441 * allowing these things will help finding errors.
445 /* If we've added search paths for this file, remove them */
446 if (S->V.File.IncSearchPath) {
447 PopSearchPath (IncSearchPath);
449 if (S->V.File.BinSearchPath) {
450 PopSearchPath (BinSearchPath);
453 /* Free the line buffer */
454 SB_Done (&S->V.File.Line);
456 /* Close the input file and decrement the file count. We will ignore
457 * errors here, since we were just reading from the file.
459 (void) fclose (S->V.File.F);
465 /* Set of input file handling functions */
466 static const CharSourceFunctions IFFunc = {
474 int NewInputFile (const char* Name)
475 /* Open a new input file. Returns true if the file could be successfully opened
476 * and false otherwise.
479 int RetCode = 0; /* Return code. Assume an error. */
483 StrBuf NameBuf; /* No need to initialize */
484 StrBuf Path = AUTO_STRBUF_INITIALIZER;
489 /* If this is the main file, just try to open it. If it's an include file,
490 * search for it using the include path list.
494 F = fopen (Name, "r");
496 Fatal ("Cannot open input file `%s': %s", Name, strerror (errno));
499 /* We are on include level. Search for the file in the include
502 PathName = SearchFile (IncSearchPath, Name);
503 if (PathName == 0 || (F = fopen (PathName, "r")) == 0) {
504 /* Not found or cannot open, print an error and bail out */
505 Error ("Cannot open include file `%s': %s", Name, strerror (errno));
509 /* Use the path name from now on */
513 /* Stat the file and remember the values. There a race condition here,
514 * since we cannot use fileno() (non standard identifier in standard
515 * header file), and therefore not fstat. When using stat with the
516 * file name, there's a risk that the file was deleted and recreated
517 * while it was open. Since mtime and size are only used to check
518 * if a file has changed in the debugger, we will ignore this problem
521 if (FileStat (Name, &Buf) != 0) {
522 Fatal ("Cannot stat input file `%s': %s", Name, strerror (errno));
525 /* Add the file to the input file table and remember the index */
526 FileIdx = AddFile (SB_InitFromString (&NameBuf, Name),
527 (FCount == 0)? FT_MAIN : FT_INCLUDE,
528 Buf.st_size, (unsigned long) Buf.st_mtime);
530 /* Create a new input source variable and initialize it */
531 S = xmalloc (sizeof (*S));
534 S->V.File.Pos.Line = 0;
535 S->V.File.Pos.Col = 0;
536 S->V.File.Pos.Name = FileIdx;
537 SB_Init (&S->V.File.Line);
539 /* Push the path for this file onto the include search lists */
540 SB_CopyBuf (&Path, Name, FindName (Name) - Name);
541 SB_Terminate (&Path);
542 S->V.File.IncSearchPath = PushSearchPath (IncSearchPath, SB_GetConstBuf (&Path));
543 S->V.File.BinSearchPath = PushSearchPath (BinSearchPath, SB_GetConstBuf (&Path));
546 /* Count active input files */
549 /* Use this input source */
552 /* File successfully opened */
556 /* Free an allocated name buffer */
559 /* Return the success code */
565 /*****************************************************************************/
566 /* InputData functions */
567 /*****************************************************************************/
571 static void IDMarkStart (CharSource* S attribute ((unused)))
572 /* Mark the start of the next token */
574 /* Nothing to do here */
579 static void IDNextChar (CharSource* S)
580 /* Read the next character from the input text */
582 C = *S->V.Data.Pos++;
584 /* End of input data */
592 void IDDone (CharSource* S)
593 /* Close the current input data */
595 /* Cleanup the current stuff */
596 if (S->V.Data.Malloced) {
597 xfree (S->V.Data.Text);
603 /* Set of input data handling functions */
604 static const CharSourceFunctions IDFunc = {
612 void NewInputData (char* Text, int Malloced)
613 /* Add a chunk of input data to the input stream */
617 /* Create a new input source variable and initialize it */
618 S = xmalloc (sizeof (*S));
620 S->V.Data.Text = Text;
621 S->V.Data.Pos = Text;
622 S->V.Data.Malloced = Malloced;
624 /* Use this input source */
630 /*****************************************************************************/
631 /* Character classification functions */
632 /*****************************************************************************/
637 /* Return true if the character is a valid character for an identifier */
639 return IsAlNum (C) ||
641 (C == '@' && AtInIdents) ||
642 (C == '$' && DollarInIdents);
647 int IsIdStart (int C)
648 /* Return true if the character may start an identifier */
650 return IsAlpha (C) || C == '_';
655 /*****************************************************************************/
657 /*****************************************************************************/
661 static unsigned DigitVal (unsigned char C)
662 /* Convert a digit into it's numerical representation */
667 return toupper (C) - 'A' + 10;
673 static void NextChar (void)
674 /* Read the next character from the input file */
676 Source->Func->NextChar (Source);
681 void LocaseSVal (void)
682 /* Make SVal lower case */
684 SB_ToLower (&CurTok.SVal);
689 void UpcaseSVal (void)
690 /* Make SVal upper case */
692 SB_ToUpper (&CurTok.SVal);
697 static int CmpDotKeyword (const void* K1, const void* K2)
698 /* Compare function for the dot keyword search */
700 return strcmp (((struct DotKeyword*)K1)->Key, ((struct DotKeyword*)K2)->Key);
705 static token_t FindDotKeyword (void)
706 /* Find the dot keyword in SVal. Return the corresponding token if found,
707 * return TOK_NONE if not found.
711 struct DotKeyword* R;
714 K.Key = SB_GetConstBuf (&CurTok.SVal);
717 /* If we aren't in ignore case mode, we have to uppercase the keyword */
722 /* Search for the keyword */
723 R = bsearch (&K, DotKeywords, sizeof (DotKeywords) / sizeof (DotKeywords [0]),
724 sizeof (DotKeywords [0]), CmpDotKeyword);
734 static void ReadIdent (void)
735 /* Read an identifier from the current input position into Ident. Filling SVal
736 * starts at the current position with the next character in C. It is assumed
737 * that any characters already filled in are ok, and the character in C is
741 /* Read the identifier */
743 SB_AppendChar (&CurTok.SVal, C);
745 } while (IsIdChar (C));
746 SB_Terminate (&CurTok.SVal);
748 /* If we should ignore case, convert the identifier to upper case */
756 static void ReadStringConst (int StringTerm)
757 /* Read a string constant into SVal. */
759 /* Skip the leading string terminator */
762 /* Read the string */
764 if (C == StringTerm) {
767 if (C == '\n' || C == EOF) {
768 Error ("Newline in string constant");
772 /* Append the char to the string */
773 SB_AppendChar (&CurTok.SVal, C);
775 /* Skip the character */
779 /* Skip the trailing terminator */
782 /* Terminate the string */
783 SB_Terminate (&CurTok.SVal);
788 static int Sweet16Reg (const StrBuf* Id)
789 /* Check if the given identifier is a sweet16 register. Return -1 if this is
790 * not the case, return the register number otherwise.
796 if (SB_GetLen (Id) < 2) {
799 if (toupper (SB_AtUnchecked (Id, 0)) != 'R') {
802 if (!IsDigit (SB_AtUnchecked (Id, 1))) {
806 if (sscanf (SB_GetConstBuf (Id)+1, "%u%c", &RegNum, &Check) != 1 || RegNum > 15) {
807 /* Invalid register */
811 /* The register number is valid */
817 void NextRawTok (void)
818 /* Read the next raw token from the input stream */
822 /* If we've a forced end of assembly, don't read further */
824 CurTok.Tok = TOK_EOF;
829 /* Check if we have tokens from another input source */
830 if (InputFromStack ()) {
831 if (CurTok.Tok == TOK_IDENT && (M = FindDefine (&CurTok.SVal)) != 0) {
832 /* This is a define style macro - expand it */
840 /* Skip whitespace, remember if we had some */
841 if ((CurTok.WS = IsBlank (C)) != 0) {
844 } while (IsBlank (C));
847 /* Mark the file position of the next token */
848 Source->Func->MarkStart (Source);
850 /* Clear the string attribute */
851 SB_Clear (&CurTok.SVal);
853 /* Generate line info for the current token */
856 /* Hex number or PC symbol? */
860 /* Hex digit must follow or DollarIsPC must be enabled */
866 Error ("Hexadecimal digit expected");
870 /* Read the number */
873 if (UnderlineInNumbers && C == '_') {
878 Error ("Number may not end with underline");
882 if (CurTok.IVal & 0xF0000000) {
883 Error ("Overflow in hexadecimal number");
886 CurTok.IVal = (CurTok.IVal << 4) + DigitVal (C);
893 /* This is an integer constant */
894 CurTok.Tok = TOK_INTCON;
902 /* 0 or 1 must follow */
904 Error ("Binary digit expected");
907 /* Read the number */
910 if (UnderlineInNumbers && C == '_') {
915 Error ("Number may not end with underline");
919 if (CurTok.IVal & 0x80000000) {
920 Error ("Overflow in binary number");
923 CurTok.IVal = (CurTok.IVal << 1) + DigitVal (C);
930 /* This is an integer constant */
931 CurTok.Tok = TOK_INTCON;
945 /* Ignore leading zeros */
950 /* Read the number into Buf counting the digits */
953 if (UnderlineInNumbers && C == '_') {
958 Error ("Number may not end with underline");
962 /* Buf is big enough to allow any decimal and hex number to
963 * overflow, so ignore excess digits here, they will be detected
964 * when we convert the value.
966 if (Digits < sizeof (Buf)) {
975 /* Allow zilog/intel style hex numbers with a 'h' suffix */
976 if (C == 'h' || C == 'H') {
979 Max = 0xFFFFFFFFUL / 16;
982 Max = 0xFFFFFFFFUL / 10;
985 /* Convert the number using the given base */
987 for (I = 0; I < Digits; ++I) {
988 if (CurTok.IVal > Max) {
989 Error ("Number out of range");
993 DVal = DigitVal (Buf[I]);
995 Error ("Invalid digits in number");
999 CurTok.IVal = (CurTok.IVal * Base) + DVal;
1002 /* This is an integer constant */
1003 CurTok.Tok = TOK_INTCON;
1007 /* Control command? */
1010 /* Remember and skip the dot */
1013 /* Check if it's just a dot */
1014 if (!IsIdStart (C)) {
1017 CurTok.Tok = TOK_DOT;
1021 /* Read the remainder of the identifier */
1022 SB_AppendChar (&CurTok.SVal, '.');
1025 /* Dot keyword, search for it */
1026 CurTok.Tok = FindDotKeyword ();
1027 if (CurTok.Tok == TOK_NONE) {
1030 if (!LeadingDotInIdents) {
1031 /* Invalid pseudo instruction */
1032 Error ("`%m%p' is not a recognized control command", &CurTok.SVal);
1036 /* An identifier with a dot. Check if it's a define style
1039 if ((M = FindDefine (&CurTok.SVal)) != 0) {
1040 /* This is a define style macro - expand it */
1045 /* Just an identifier with a dot */
1046 CurTok.Tok = TOK_IDENT;
1053 /* Indirect op for sweet16 cpu. Must check this before checking for local
1054 * symbols, because these may also use the '@' symbol.
1056 if (CPU == CPU_SWEET16 && C == '@') {
1058 CurTok.Tok = TOK_AT;
1063 if (C == LocalStart) {
1065 /* Read the identifier. */
1068 /* Start character alone is not enough */
1069 if (SB_GetLen (&CurTok.SVal) == 1) {
1070 Error ("Invalid cheap local symbol");
1074 /* A local identifier */
1075 CurTok.Tok = TOK_LOCAL_IDENT;
1080 /* Identifier or keyword? */
1081 if (IsIdStart (C)) {
1083 /* Read the identifier */
1086 /* Check for special names. Bail out if we have identified the type of
1087 * the token. Go on if the token is an identifier.
1089 if (SB_GetLen (&CurTok.SVal) == 1) {
1090 switch (toupper (SB_AtUnchecked (&CurTok.SVal, 0))) {
1095 CurTok.Tok = TOK_OVERRIDE_ABS;
1104 CurTok.Tok = TOK_OVERRIDE_FAR;
1110 if (CPU == CPU_65816) {
1127 CurTok.Tok = TOK_OVERRIDE_ZP;
1136 } else if (CPU == CPU_SWEET16 &&
1137 (CurTok.IVal = Sweet16Reg (&CurTok.SVal)) >= 0) {
1139 /* A sweet16 register number in sweet16 mode */
1140 CurTok.Tok = TOK_REG;
1145 /* Check for define style macro */
1146 if ((M = FindDefine (&CurTok.SVal)) != 0) {
1147 /* Macro - expand it */
1152 CurTok.Tok = TOK_IDENT;
1157 /* Ok, let's do the switch */
1163 CurTok.Tok = TOK_PLUS;
1168 CurTok.Tok = TOK_MINUS;
1174 CurTok.Tok = TOK_DIV;
1175 } else if (CComments) {
1176 /* Remember the position, then skip the '*' */
1177 Collection LineInfos = STATIC_COLLECTION_INITIALIZER;
1178 GetFullLineInfo (&LineInfos);
1183 LIError (&LineInfos, "Unterminated comment");
1184 ReleaseFullLineInfo (&LineInfos);
1185 DoneCollection (&LineInfos);
1193 ReleaseFullLineInfo (&LineInfos);
1194 DoneCollection (&LineInfos);
1201 CurTok.Tok = TOK_MUL;
1206 CurTok.Tok = TOK_XOR;
1213 CurTok.Tok = TOK_BOOLAND;
1215 CurTok.Tok = TOK_AND;
1223 CurTok.Tok = TOK_BOOLOR;
1225 CurTok.Tok = TOK_OR;
1235 CurTok.Tok = TOK_NAMESPACE;
1244 CurTok.Tok = TOK_ULABEL;
1253 CurTok.Tok = TOK_ULABEL;
1258 CurTok.Tok = TOK_ASSIGN;
1262 CurTok.Tok = TOK_COLON;
1269 CurTok.Tok = TOK_COMMA;
1274 while (C != '\n' && C != EOF) {
1281 CurTok.Tok = TOK_HASH;
1286 CurTok.Tok = TOK_LPAREN;
1291 CurTok.Tok = TOK_RPAREN;
1296 CurTok.Tok = TOK_LBRACK;
1301 CurTok.Tok = TOK_RBRACK;
1306 CurTok.Tok = TOK_LCURLY;
1311 CurTok.Tok = TOK_RCURLY;
1318 CurTok.Tok = TOK_LE;
1319 } else if (C == '<') {
1321 CurTok.Tok = TOK_SHL;
1322 } else if (C == '>') {
1324 CurTok.Tok = TOK_NE;
1326 CurTok.Tok = TOK_LT;
1332 CurTok.Tok = TOK_EQ;
1337 CurTok.Tok = TOK_BOOLNOT;
1344 CurTok.Tok = TOK_GE;
1345 } else if (C == '>') {
1347 CurTok.Tok = TOK_SHR;
1349 CurTok.Tok = TOK_GT;
1355 CurTok.Tok = TOK_NOT;
1359 /* Hack: If we allow ' as terminating character for strings, read
1360 * the following stuff as a string, and check for a one character
1363 if (LooseStringTerm) {
1364 ReadStringConst ('\'');
1365 if (SB_GetLen (&CurTok.SVal) == 1) {
1366 CurTok.IVal = SB_AtUnchecked (&CurTok.SVal, 0);
1367 CurTok.Tok = TOK_CHARCON;
1369 CurTok.Tok = TOK_STRCON;
1372 /* Always a character constant */
1374 if (C == EOF || IsControl (C)) {
1375 Error ("Illegal character constant");
1379 CurTok.Tok = TOK_CHARCON;
1382 if (!MissingCharTerm) {
1383 Error ("Illegal character constant");
1392 ReadStringConst ('\"');
1393 CurTok.Tok = TOK_STRCON;
1397 /* Line continuation? */
1401 /* Handle as white space */
1411 CurTok.Tok = TOK_SEP;
1416 /* In case of the main file, do not close it, but return EOF. */
1417 if (Source && Source->Next) {
1421 CurTok.Tok = TOK_EOF;
1426 /* If we go here, we could not identify the current character. Skip it
1429 Error ("Invalid input character: 0x%02X", C & 0xFF);
1436 int GetSubKey (const char** Keys, unsigned Count)
1437 /* Search for a subkey in a table of keywords. The current token must be an
1438 * identifier and all keys must be in upper case. The identifier will be
1439 * uppercased in the process. The function returns the index of the keyword,
1440 * or -1 if the keyword was not found.
1445 /* Must have an identifier */
1446 PRECONDITION (CurTok.Tok == TOK_IDENT);
1448 /* If we aren't in ignore case mode, we have to uppercase the identifier */
1453 /* Do a linear search (a binary search is not worth the effort) */
1454 for (I = 0; I < Count; ++I) {
1455 if (SB_CompareStr (&CurTok.SVal, Keys [I]) == 0) {
1467 unsigned char ParseAddrSize (void)
1468 /* Check if the next token is a keyword that denotes an address size specifier.
1469 * If so, return the corresponding address size constant, otherwise output an
1470 * error message and return ADDR_SIZE_DEFAULT.
1473 unsigned char AddrSize;
1475 /* Check for an identifier */
1476 if (CurTok.Tok != TOK_IDENT) {
1477 Error ("Address size specifier expected");
1478 return ADDR_SIZE_DEFAULT;
1481 /* Convert the attribute */
1482 AddrSize = AddrSizeFromStr (SB_GetConstBuf (&CurTok.SVal));
1483 if (AddrSize == ADDR_SIZE_INVALID) {
1484 Error ("Address size specifier expected");
1485 AddrSize = ADDR_SIZE_DEFAULT;
1494 void InitScanner (const char* InFile)
1495 /* Initialize the scanner, open the given input file */
1497 /* Open the input file */
1498 NewInputFile (InFile);
1503 void DoneScanner (void)
1504 /* Release scanner resources */