1 /*-----------------------------------------------------------------------
2 SDCC.lex - lexical analyser for use with sdcc ( a freeware compiler for
3 8/16 bit microcontrollers)
4 Written by : Sandeep Dutta . sandeep.dutta@usa.net (1997)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
39 char *stringLiteral();
42 extern int lineno, column;
43 extern char *filename ;
46 int process_pragma(char *);
49 int yywrap YY_PROTO((void))
53 #define TKEYWORD(token) return (isTargetKeyword(yytext) ? token :\
58 extern int check_type ();
59 extern int isTargetKeyword ();
60 extern int checkCurrFile (char *);
61 extern int processPragma (char *);
62 extern int printListing (int );
63 struct optimize save_optimize ;
64 struct options save_options ;
80 P_OVERLAY_ /* I had a strange conflict with P_OVERLAY while */
81 /* cross-compiling for MINGW32 with gcc 3.2 */
89 asmp = asmbuff = realloc (asmbuff, INITIAL_INLINEASM);
90 asmbuffSize=INITIAL_INLINEASM;
96 yylval.yyinline = malloc (strlen(asmbuff)+1);
97 strcpy(yylval.yyinline,asmbuff);
102 if (asmp-asmbuff >= asmbuffSize-2) {
103 // increase the buffersize with 50%
104 int size=asmp-asmbuff;
105 asmbuffSize=asmbuffSize*3/2;
106 asmbuff = realloc (asmbuff, asmbuffSize);
113 if (asmp-asmbuff >= asmbuffSize-3) {
114 // increase the buffersize with 50%
115 int size=asmp-asmbuff;
116 asmbuffSize=asmbuffSize*3/2;
117 asmbuff = realloc (asmbuff, asmbuffSize);
122 "at" { count(); TKEYWORD(AT) ; }
123 "auto" { count(); return(AUTO); }
124 "bit" { count(); TKEYWORD(BIT) ; }
125 "break" { count(); return(BREAK); }
126 "case" { count(); return(CASE); }
127 "char" { count(); return(CHAR); }
128 "code" { count(); TKEYWORD(CODE); }
129 "const" { count(); return(CONST); }
130 "continue" { count(); return(CONTINUE); }
131 "critical" { count(); TKEYWORD(CRITICAL); }
132 "data" { count(); TKEYWORD(DATA); }
133 "default" { count(); return(DEFAULT); }
134 "do" { count(); return(DO); }
135 "double" { count(); werror(W_DOUBLE_UNSUPPORTED);return(FLOAT); }
136 "else" { count(); return(ELSE); }
137 "enum" { count(); return(ENUM); }
138 "extern" { count(); return(EXTERN); }
139 "far" { count(); TKEYWORD(XDATA); }
140 "eeprom" { count(); TKEYWORD(EEPROM); }
141 "float" { count(); return(FLOAT); }
142 "flash" { count(); TKEYWORD(CODE);}
143 "for" { count(); return(FOR); }
144 "goto" { count(); return(GOTO); }
145 "idata" { count(); TKEYWORD(IDATA);}
146 "if" { count(); return(IF); }
147 "int" { count(); return(INT); }
148 "interrupt" { count(); return(INTERRUPT);}
149 "nonbanked" { count(); TKEYWORD(NONBANKED);}
150 "banked" { count(); TKEYWORD(BANKED);}
151 "long" { count(); return(LONG); }
152 "near" { count(); TKEYWORD(DATA);}
153 "pdata" { count(); TKEYWORD(PDATA); }
154 "reentrant" { count(); TKEYWORD(REENTRANT);}
155 "register" { count(); return(REGISTER); }
156 "return" { count(); return(RETURN); }
157 "sfr" { count(); TKEYWORD(SFR) ; }
158 "sbit" { count(); TKEYWORD(SBIT) ; }
159 "short" { count(); return(SHORT); }
160 "signed" { count(); return(SIGNED); }
161 "sizeof" { count(); return(SIZEOF); }
162 "sram" { count(); TKEYWORD(XDATA);}
163 "static" { count(); return(STATIC); }
164 "struct" { count(); return(STRUCT); }
165 "switch" { count(); return(SWITCH); }
166 "typedef" { count(); return(TYPEDEF); }
167 "union" { count(); return(UNION); }
168 "unsigned" { count(); return(UNSIGNED); }
169 "void" { count(); return(VOID); }
170 "volatile" { count(); return(VOLATILE); }
171 "using" { count(); TKEYWORD(USING); }
172 "_naked" { count(); TKEYWORD(NAKED); }
173 "while" { count(); return(WHILE); }
174 "xdata" { count(); TKEYWORD(XDATA); }
175 "..." { count(); return(VAR_ARGS);}
176 "__typeof" { count(); return TYPEOF;}
177 "_JavaNative" { count(); TKEYWORD(JAVANATIVE);}
178 "_overlay" { count(); TKEYWORD(OVERLAY);}
179 {L}({L}|{D})* { count(); return(check_type()); }
180 0[xX]{H}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
181 0{D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
182 {D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
183 '(\\.|[^\\'])+' { count();yylval.val = charVal (yytext); return(CONSTANT); /* ' make syntax highliter happy */}
184 {D}+{E}{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
185 {D}*"."{D}+({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
186 {D}+"."{D}*({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
187 \" { count(); yylval.val=strVal(stringLiteral()); return(STRING_LITERAL);}
188 ">>=" { count(); yylval.yyint = RIGHT_ASSIGN ; return(RIGHT_ASSIGN); }
189 "<<=" { count(); yylval.yyint = LEFT_ASSIGN ; return(LEFT_ASSIGN) ; }
190 "+=" { count(); yylval.yyint = ADD_ASSIGN ; return(ADD_ASSIGN) ; }
191 "-=" { count(); yylval.yyint = SUB_ASSIGN ; return(SUB_ASSIGN) ; }
192 "*=" { count(); yylval.yyint = MUL_ASSIGN ; return(MUL_ASSIGN) ; }
193 "/=" { count(); yylval.yyint = DIV_ASSIGN ; return(DIV_ASSIGN) ; }
194 "%=" { count(); yylval.yyint = MOD_ASSIGN ; return(MOD_ASSIGN) ; }
195 "&=" { count(); yylval.yyint = AND_ASSIGN ; return(AND_ASSIGN) ; }
196 "^=" { count(); yylval.yyint = XOR_ASSIGN ; return(XOR_ASSIGN) ; }
197 "|=" { count(); yylval.yyint = OR_ASSIGN ; return(OR_ASSIGN) ; }
198 ">>" { count(); return(RIGHT_OP); }
199 "<<" { count(); return(LEFT_OP); }
200 "++" { count(); return(INC_OP); }
201 "--" { count(); return(DEC_OP); }
202 "->" { count(); return(PTR_OP); }
203 "&&" { count(); return(AND_OP); }
204 "||" { count(); return(OR_OP); }
205 "<=" { count(); return(LE_OP); }
206 ">=" { count(); return(GE_OP); }
207 "==" { count(); return(EQ_OP); }
208 "!=" { count(); return(NE_OP); }
209 ";" { count(); return(';'); }
210 "{" { count(); NestLevel++ ; return('{'); }
211 "}" { count(); NestLevel--; return('}'); }
212 "," { count(); return(','); }
213 ":" { count(); return(':'); }
214 "=" { count(); return('='); }
215 "(" { count(); return('('); }
216 ")" { count(); return(')'); }
217 "[" { count(); return('['); }
218 "]" { count(); return(']'); }
219 "." { count(); return('.'); }
220 "&" { count(); return('&'); }
221 "!" { count(); return('!'); }
222 "~" { count(); return('~'); }
223 "-" { count(); return('-'); }
224 "+" { count(); return('+'); }
225 "*" { count(); return('*'); }
226 "/" { count(); return('/'); }
227 "%" { count(); return('%'); }
228 "<" { count(); return('<'); }
229 ">" { count(); return('>'); }
230 "^" { count(); return('^'); }
231 "|" { count(); return('|'); }
232 "?" { count(); return('?'); }
233 ^#line.*"\n" { count(); checkCurrFile(yytext); }
234 ^#pragma.*"\n" { count(); process_pragma(yytext); }
236 ^[^(]+"("[0-9]+") : error"[^\n]+ { werror(E_PRE_PROC_FAILED,yytext);count(); }
237 ^[^(]+"("[0-9]+") : warning"[^\n]+ { werror(W_PRE_PROC_WARNING,yytext);count(); }
240 [ \t\v\f] { count(); }
244 // that could have been removed by the preprocessor anyway
245 werror (W_STRAY_BACKSLASH, column);
252 int checkCurrFile ( char *s)
258 /* first check if this is a #line */
259 if ( strncmp(s,"#line",5) )
262 /* get to the line number */
269 sscanf(lineNum,"%d",&lNum);
271 /* now see if we have a file name */
272 while (*s != '\"' && *s)
275 /* if we don't have a filename then */
276 /* set the current line number to */
277 /* line number if printFlag is on */
279 lineno = yylineno = lNum ;
283 /* if we have a filename then check */
284 /* if it is "standard in" if yes then */
285 /* get the currentfile name info */
288 /* in c1mode fullSrcFileName is NULL */
289 if ( fullSrcFileName &&
290 strncmp(s,fullSrcFileName,strlen(fullSrcFileName)) == 0) {
291 lineno = yylineno = lNum;
292 currFname = fullSrcFileName ;
295 /* mark the end of the filename */
296 while (*s != '"') s++;
298 currFname = malloc (strlen(sb)+1);
299 strcpy(currFname,sb);
300 lineno = yylineno = lNum;
302 filename = currFname ;
312 for (i = 0; yytext[i] != '\0'; i++) {
313 if (yytext[i] == '\n') {
315 lineno = ++yylineno ;
318 if (yytext[i] == '\t')
319 column += 8 - (column % 8);
328 /* check if it is in the typedef table */
329 if (findSym(TypedefTab,NULL,yytext)) {
330 strcpy(yylval.yychar,yytext);
334 strcpy (yylval.yychar,yytext);
339 char strLitBuff[2048]; // TODO: this is asking for the next bug :)
342 * Change by JTV 2001-05-19 to not concantenate strings
343 * to support ANSI hex and octal escape sequences in string liteals
346 char *stringLiteral () {
348 char *str = strLitBuff;
351 /* put into the buffer till we hit the first \" */
357 break; /* end of input */
359 /* if it is a \ then escape char's are allowed */
363 /* \<newline> is a continuator */
368 *str++ = '\\'; /* backslash in place */
369 *str++ = ch; /* get the escape char, no further check */
370 continue; /* carry on */
373 /* if new line we have a new line break, which is illegal */
375 werror (W_NEWLINE_IN_STRING);
382 /* if this is a quote then we have work to do */
383 /* find the next non whitespace character */
384 /* if that is a double quote then carry on */
386 *str++ = ch ; /* Pass end of this string or substring to evaluator */
387 while ((ch = input()) && (isspace(ch) || ch=='\\')) {
390 if ((ch=input())!='\n') {
391 werror (W_STRAY_BACKSLASH, column);
412 *str++ = ch; /* Put next substring introducer into output string */
419 void doPragma (int op, char *cp)
423 memcpy(&save_options,&options,sizeof(options));
424 memcpy(&save_optimize,&optimize,sizeof(optimize));
427 memcpy(&options,&save_options,sizeof(options));
428 memcpy(&optimize,&save_optimize,sizeof(optimize));
431 optimize.loopInduction = 0 ;
434 optimize.loopInvariant = 0 ;
437 optimize.loopInduction = 1 ;
440 options.stackAuto = 1;
443 optimize.noJTabBoundary = 1;
446 optimize.global_cse = 0;
449 options.noOverlay = 1;
454 /* append to the functions already listed
456 for (; options.calleeSaves[i] ;i++);
457 parseWithComma(&options.calleeSaves[i], Safe_strdup(cp));
461 parseWithComma(options.excludeRegs, Safe_strdup(cp));
467 optimize.noLoopReverse = 1;
474 int process_pragma(char *s)
477 /* find the pragma */
478 while (strncmp(s,"#pragma",7))
482 /* look for the directive */
483 while(isspace(*s)) s++;
486 /* look for the end of the directive */
487 while ((! isspace(*s)) &&
491 /* First give the port a chance */
492 if (port->process_pragma && !port->process_pragma(cp))
495 /* now compare and do what needs to be done */
496 if (strncmp(cp,PRAGMA_SAVE,strlen(PRAGMA_SAVE)) == 0) {
497 doPragma(P_SAVE,cp+strlen(PRAGMA_SAVE));
501 if (strncmp(cp,PRAGMA_RESTORE,strlen(PRAGMA_RESTORE)) == 0) {
502 doPragma (P_RESTORE,cp+strlen(PRAGMA_RESTORE));
506 if (strncmp(cp,PRAGMA_NOINDUCTION,strlen(PRAGMA_NOINDUCTION)) == 0) {
507 doPragma (P_NOINDUCTION,cp+strlen(PRAGMA_NOINDUCTION)) ;
511 if (strncmp(cp,PRAGMA_NOINVARIANT,strlen(PRAGMA_NOINVARIANT)) == 0) {
512 doPragma (P_NOINVARIANT,NULL) ;
516 if (strncmp(cp,PRAGMA_INDUCTION,strlen(PRAGMA_INDUCTION)) == 0) {
517 doPragma (P_INDUCTION,NULL) ;
521 if (strncmp(cp,PRAGMA_STACKAUTO,strlen(PRAGMA_STACKAUTO)) == 0) {
522 doPragma (P_STACKAUTO,NULL);
526 if (strncmp(cp,PRAGMA_NOJTBOUND,strlen(PRAGMA_NOJTBOUND)) == 0) {
527 doPragma (P_NOJTBOUND,NULL);
531 if (strncmp(cp,PRAGMA_NOGCSE,strlen(PRAGMA_NOGCSE)) == 0) {
532 doPragma (P_NOGCSE,NULL);
536 if (strncmp(cp,PRAGMA_NOOVERLAY,strlen(PRAGMA_NOOVERLAY)) == 0) {
537 doPragma (P_NOOVERLAY,NULL);
541 if (strncmp(cp,PRAGMA_CALLEESAVES,strlen(PRAGMA_CALLEESAVES)) == 0) {
542 doPragma(P_CALLEE_SAVES,cp+strlen(PRAGMA_CALLEESAVES));
546 if (strncmp(cp,PRAGMA_EXCLUDE,strlen(PRAGMA_EXCLUDE)) == 0) {
547 doPragma(P_EXCLUDE,cp+strlen(PRAGMA_EXCLUDE));
551 if (strncmp(cp,PRAGMA_NOIV,strlen(PRAGMA_NOIV)) == 0) {
552 doPragma(P_NOIV,cp+strlen(PRAGMA_NOIV));
556 if (strncmp(cp,PRAGMA_NOLOOPREV,strlen(PRAGMA_NOLOOPREV)) == 0) {
557 doPragma(P_LOOPREV,NULL);
561 werror(W_UNKNOWN_PRAGMA,cp);
565 /* will return 1 if the string is a part
566 of a target specific keyword */
567 int isTargetKeyword(char *s)
571 if (port->keywords == NULL)
573 for ( i = 0 ; port->keywords[i] ; i++ ) {
574 if (strcmp(port->keywords[i],s) == 0)
581 extern int fatalError;
587 if (yylineno && filename) {
588 fprintf(stdout,"\n%s:%d: %s: token -> '%s' ; column %d\n",
593 // this comes from an empy file, no problem