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 ;
44 extern char *fullSrcFileName ;
47 int process_pragma(char *);
50 int yywrap YY_PROTO((void))
54 #define TKEYWORD(token) return (isTargetKeyword(yytext) ? token :\
59 extern int check_type ();
60 extern int isTargetKeyword ();
61 extern int checkCurrFile (char *);
62 extern int processPragma (char *);
63 extern int printListing (int );
64 struct optimize save_optimize ;
65 struct options save_options ;
87 asmp = asmbuff = Safe_realloc (asmbuff, INITIAL_INLINEASM);
88 asmbuffSize=INITIAL_INLINEASM;
94 yylval.yyinline = Safe_calloc (1, strlen(asmbuff)+1);
95 strcpy(yylval.yyinline,asmbuff);
100 if (asmp-asmbuff >= asmbuffSize-2) {
101 // increase the buffersize with 50%
102 int size=asmp-asmbuff;
103 asmbuffSize=asmbuffSize*3/2;
104 asmbuff = Safe_realloc (asmbuff, asmbuffSize);
111 if (asmp-asmbuff >= asmbuffSize-3) {
112 // increase the buffersize with 50%
113 int size=asmp-asmbuff;
114 asmbuffSize=asmbuffSize*3/2;
115 asmbuff = Safe_realloc (asmbuff, asmbuffSize);
120 "at" { count(); TKEYWORD(AT) ; }
121 "auto" { count(); return(AUTO); }
122 "bit" { count(); TKEYWORD(BIT) ; }
123 "break" { count(); return(BREAK); }
124 "case" { count(); return(CASE); }
125 "char" { count(); return(CHAR); }
126 "code" { count(); TKEYWORD(CODE); }
127 "const" { count(); return(CONST); }
128 "continue" { count(); return(CONTINUE); }
129 "critical" { count(); TKEYWORD(CRITICAL); }
130 "data" { count(); TKEYWORD(DATA); }
131 "default" { count(); return(DEFAULT); }
132 "do" { count(); return(DO); }
133 "double" { count(); werror(W_DOUBLE_UNSUPPORTED);return(FLOAT); }
134 "else" { count(); return(ELSE); }
135 "enum" { count(); return(ENUM); }
136 "extern" { count(); return(EXTERN); }
137 "far" { count(); TKEYWORD(XDATA); }
138 "eeprom" { count(); TKEYWORD(EEPROM); }
139 "float" { count(); return(FLOAT); }
140 "flash" { count(); TKEYWORD(CODE);}
141 "for" { count(); return(FOR); }
142 "goto" { count(); return(GOTO); }
143 "idata" { count(); TKEYWORD(IDATA);}
144 "if" { count(); return(IF); }
145 "int" { count(); return(INT); }
146 "interrupt" { count(); return(INTERRUPT);}
147 "nonbanked" { count(); TKEYWORD(NONBANKED);}
148 "banked" { count(); TKEYWORD(BANKED);}
149 "long" { count(); return(LONG); }
150 "near" { count(); TKEYWORD(DATA);}
151 "pdata" { count(); TKEYWORD(PDATA); }
152 "reentrant" { count(); TKEYWORD(REENTRANT);}
153 "register" { count(); return(REGISTER); }
154 "return" { count(); return(RETURN); }
155 "sfr" { count(); TKEYWORD(SFR) ; }
156 "sbit" { count(); TKEYWORD(SBIT) ; }
157 "short" { count(); return(SHORT); }
158 "signed" { count(); return(SIGNED); }
159 "sizeof" { count(); return(SIZEOF); }
160 "sram" { count(); TKEYWORD(XDATA);}
161 "static" { count(); return(STATIC); }
162 "struct" { count(); return(STRUCT); }
163 "switch" { count(); return(SWITCH); }
164 "typedef" { count(); return(TYPEDEF); }
165 "union" { count(); return(UNION); }
166 "unsigned" { count(); return(UNSIGNED); }
167 "void" { count(); return(VOID); }
168 "volatile" { count(); return(VOLATILE); }
169 "using" { count(); TKEYWORD(USING); }
170 "_naked" { count(); TKEYWORD(NAKED); }
171 "while" { count(); return(WHILE); }
172 "xdata" { count(); TKEYWORD(XDATA); }
173 "_data" { count(); TKEYWORD(_NEAR); }
174 "_code" { count(); TKEYWORD(_CODE); }
175 "_eeprom" { count(); TKEYWORD(_EEPROM); }
176 "_flash" { count(); TKEYWORD(_CODE); }
177 "_generic" { count(); TKEYWORD(_GENERIC); }
178 "_near" { count(); TKEYWORD(_NEAR); }
179 "_sram" { count(); TKEYWORD(_XDATA);}
180 "_xdata" { count(); TKEYWORD(_XDATA);}
181 "_pdata" { count(); TKEYWORD(_PDATA); }
182 "_idata" { count(); TKEYWORD(_IDATA); }
183 "..." { count(); return(VAR_ARGS);}
184 {L}({L}|{D})* { count(); return(check_type()); }
185 0[xX]{H}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
186 0{D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
187 {D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
188 '(\\.|[^\\'])+' { count();yylval.val = charVal (yytext); return(CONSTANT); }
189 {D}+{E}{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
190 {D}*"."{D}+({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
191 {D}+"."{D}*({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
192 \" { count(); yylval.val=strVal(stringLiteral()); return(STRING_LITERAL);}
193 ">>=" { count(); yylval.yyint = RIGHT_ASSIGN ; return(RIGHT_ASSIGN); }
194 "<<=" { count(); yylval.yyint = LEFT_ASSIGN ; return(LEFT_ASSIGN) ; }
195 "+=" { count(); yylval.yyint = ADD_ASSIGN ; return(ADD_ASSIGN) ; }
196 "-=" { count(); yylval.yyint = SUB_ASSIGN ; return(SUB_ASSIGN) ; }
197 "*=" { count(); yylval.yyint = MUL_ASSIGN ; return(MUL_ASSIGN) ; }
198 "/=" { count(); yylval.yyint = DIV_ASSIGN ; return(DIV_ASSIGN) ; }
199 "%=" { count(); yylval.yyint = MOD_ASSIGN ; return(MOD_ASSIGN) ; }
200 "&=" { count(); yylval.yyint = AND_ASSIGN ; return(AND_ASSIGN) ; }
201 "^=" { count(); yylval.yyint = XOR_ASSIGN ; return(XOR_ASSIGN) ; }
202 "|=" { count(); yylval.yyint = OR_ASSIGN ; return(OR_ASSIGN) ; }
203 ">>" { count(); return(RIGHT_OP); }
204 "<<" { count(); return(LEFT_OP); }
205 "++" { count(); return(INC_OP); }
206 "--" { count(); return(DEC_OP); }
207 "->" { count(); return(PTR_OP); }
208 "&&" { count(); return(AND_OP); }
209 "||" { count(); return(OR_OP); }
210 "<=" { count(); return(LE_OP); }
211 ">=" { count(); return(GE_OP); }
212 "==" { count(); return(EQ_OP); }
213 "!=" { count(); return(NE_OP); }
214 ";" { count(); return(';'); }
215 "{" { count(); NestLevel++ ; return('{'); }
216 "}" { count(); NestLevel--; 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 "<" { count(); return('<'); }
234 ">" { count(); return('>'); }
235 "^" { count(); return('^'); }
236 "|" { count(); return('|'); }
237 "?" { count(); return('?'); }
238 ^#line.*"\n" { count(); checkCurrFile(yytext); }
239 ^#pragma.*"\n" { count(); process_pragma(yytext); }
241 ^[^(]+"("[0-9]+") : error"[^\n]+ { werror(E_PRE_PROC_FAILED,yytext);count(); }
242 ^[^(]+"("[0-9]+") : warning"[^\n]+ { werror(W_PRE_PROC_WARNING,yytext);count(); }
245 [ \t\v\f] { count(); }
249 // that could have been removed by the preprocessor anyway
250 werror (W_STRAY_BACKSLASH, column);
257 int checkCurrFile ( char *s)
263 /* first check if this is a #line */
264 if ( strncmp(s,"#line",5) )
267 /* get to the line number */
274 sscanf(lineNum,"%d",&lNum);
276 /* now see if we have a file name */
277 while (*s != '\"' && *s)
280 /* if we don't have a filename then */
281 /* set the current line number to */
282 /* line number if printFlag is on */
288 /* if we have a filename then check */
289 /* if it is "standard in" if yes then */
290 /* get the currentfile name info */
293 if ( strncmp(s,fullSrcFileName,strlen(fullSrcFileName)) == 0) {
295 currFname = fullSrcFileName ;
298 /* mark the end of the filename */
299 while (*s != '"') s++;
301 currFname = Safe_calloc(1,strlen(sb)+1);
302 strcpy(currFname,sb);
305 filename = currFname ;
315 for (i = 0; yytext[i] != '\0'; i++) {
316 if (yytext[i] == '\n') {
318 lineno = ++yylineno ;
321 if (yytext[i] == '\t')
322 column += 8 - (column % 8);
331 /* check if it is in the typedef table */
332 if (findSym(TypedefTab,NULL,yytext)) {
333 strcpy(yylval.yychar,yytext);
337 strcpy (yylval.yychar,yytext);
342 char strLitBuff[2048]; // TODO: this is asking for the next bug :)
345 * Change by JTV 2001-05-19 to not concantenate strings
346 * to support ANSI hex and octal escape sequences in string liteals
349 char *stringLiteral () {
351 char *str = strLitBuff;
354 /* put into the buffer till we hit the first \" */
360 break; /* end of input */
362 /* if it is a \ then escape char's are allowed */
366 /* \<newline> is a continuator */
371 *str++ = '\\'; /* backslash in place */
372 *str++ = ch; /* get the escape char, no further check */
373 continue; /* carry on */
376 /* if new line we have a new line break, which is illegal */
378 werror (W_NEWLINE_IN_STRING);
385 /* if this is a quote then we have work to do */
386 /* find the next non whitespace character */
387 /* if that is a double quote then carry on */
389 *str++ = ch ; /* Pass end of this string or substring to evaluator */
390 while ((ch = input()) && (isspace(ch) || ch=='\\')) {
393 if ((ch=input())!='\n') {
394 werror (W_STRAY_BACKSLASH, column);
415 *str++ = ch; /* Put next substring introducer into output string */
422 void doPragma (int op, char *cp)
426 memcpy(&save_options,&options,sizeof(options));
427 memcpy(&save_optimize,&optimize,sizeof(optimize));
430 memcpy(&options,&save_options,sizeof(options));
431 memcpy(&optimize,&save_optimize,sizeof(optimize));
434 optimize.loopInduction = 0 ;
437 optimize.loopInvariant = 0 ;
440 optimize.loopInduction = 1 ;
443 options.stackAuto = 1;
446 optimize.noJTabBoundary = 1;
449 optimize.global_cse = 0;
452 options.noOverlay = 1;
457 /* append to the functions already listed
459 for (; options.calleeSaves[i] ;i++);
460 parseWithComma(&options.calleeSaves[i],strdup(cp));
464 parseWithComma(options.excludeRegs,strdup(cp));
467 optimize.noLoopReverse = 1;
472 int process_pragma(char *s)
475 /* find the pragma */
476 while (strncmp(s,"#pragma",7))
480 /* look for the directive */
481 while(isspace(*s)) s++;
484 /* look for the end of the directive */
485 while ((! isspace(*s)) &&
489 /* First give the port a chance */
490 if (port->process_pragma && !port->process_pragma(cp))
493 /* now compare and do what needs to be done */
494 if (strncmp(cp,PRAGMA_SAVE,strlen(PRAGMA_SAVE)) == 0) {
495 doPragma(P_SAVE,cp+strlen(PRAGMA_SAVE));
499 if (strncmp(cp,PRAGMA_RESTORE,strlen(PRAGMA_RESTORE)) == 0) {
500 doPragma (P_RESTORE,cp+strlen(PRAGMA_RESTORE));
504 if (strncmp(cp,PRAGMA_NOINDUCTION,strlen(PRAGMA_NOINDUCTION)) == 0) {
505 doPragma (P_NOINDUCTION,cp+strlen(PRAGMA_NOINDUCTION)) ;
509 if (strncmp(cp,PRAGMA_NOINVARIANT,strlen(PRAGMA_NOINVARIANT)) == 0) {
510 doPragma (P_NOINVARIANT,NULL) ;
514 if (strncmp(cp,PRAGMA_INDUCTION,strlen(PRAGMA_INDUCTION)) == 0) {
515 doPragma (P_INDUCTION,NULL) ;
519 if (strncmp(cp,PRAGMA_STACKAUTO,strlen(PRAGMA_STACKAUTO)) == 0) {
520 doPragma (P_STACKAUTO,NULL);
524 if (strncmp(cp,PRAGMA_NOJTBOUND,strlen(PRAGMA_NOJTBOUND)) == 0) {
525 doPragma (P_NOJTBOUND,NULL);
529 if (strncmp(cp,PRAGMA_NOGCSE,strlen(PRAGMA_NOGCSE)) == 0) {
530 doPragma (P_NOGCSE,NULL);
534 if (strncmp(cp,PRAGMA_NOOVERLAY,strlen(PRAGMA_NOOVERLAY)) == 0) {
535 doPragma (P_NOOVERLAY,NULL);
539 if (strncmp(cp,PRAGMA_CALLEESAVES,strlen(PRAGMA_CALLEESAVES)) == 0) {
540 doPragma(P_CALLEE_SAVES,cp+strlen(PRAGMA_CALLEESAVES));
544 if (strncmp(cp,PRAGMA_EXCLUDE,strlen(PRAGMA_EXCLUDE)) == 0) {
545 doPragma(P_EXCLUDE,cp+strlen(PRAGMA_EXCLUDE));
549 if (strncmp(cp,PRAGMA_NOLOOPREV,strlen(PRAGMA_NOLOOPREV)) == 0) {
550 doPragma(P_EXCLUDE,NULL);
554 werror(W_UNKNOWN_PRAGMA,cp);
558 /* will return 1 if the string is a part
559 of a target specific keyword */
560 int isTargetKeyword(char *s)
564 if (port->keywords == NULL)
566 for ( i = 0 ; port->keywords[i] ; i++ ) {
567 if (strcmp(port->keywords[i],s) == 0)
574 extern int fatalError;
580 if (yylineno && filename)
581 fprintf(stdout,"\n%s(%d) %s: token -> '%s' ; column %d\n",