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 ;
48 int process_pragma(char *);
51 int yywrap YY_PROTO((void))
55 #define TKEYWORD(token) return (isTargetKeyword(yytext) ? token :\
60 extern int check_type ();
61 extern int isTargetKeyword ();
62 extern int checkCurrFile (char *);
63 extern int processPragma (char *);
64 extern int printListing (int );
65 struct optimize save_optimize ;
66 struct options save_options ;
88 asmp = asmbuff = Safe_realloc (asmbuff, INITIAL_INLINEASM);
89 asmbuffSize=INITIAL_INLINEASM;
95 yylval.yyinline = Safe_calloc (1, strlen(asmbuff)+1);
96 strcpy(yylval.yyinline,asmbuff);
101 if (asmp-asmbuff >= asmbuffSize-2) {
102 // increase the buffersize with 50%
103 int size=asmp-asmbuff;
104 asmbuffSize=asmbuffSize*3/2;
105 asmbuff = Safe_realloc (asmbuff, asmbuffSize);
112 if (asmp-asmbuff >= asmbuffSize-3) {
113 // increase the buffersize with 50%
114 int size=asmp-asmbuff;
115 asmbuffSize=asmbuffSize*3/2;
116 asmbuff = Safe_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 "_data" { count(); TKEYWORD(_NEAR); }
176 "_code" { count(); TKEYWORD(_CODE); }
177 "_eeprom" { count(); TKEYWORD(_EEPROM); }
178 "_flash" { count(); TKEYWORD(_CODE); }
179 "_generic" { count(); TKEYWORD(_GENERIC); }
180 "_near" { count(); TKEYWORD(_NEAR); }
181 "_sram" { count(); TKEYWORD(_XDATA);}
182 "_xdata" { count(); TKEYWORD(_XDATA);}
183 "_pdata" { count(); TKEYWORD(_PDATA); }
184 "_idata" { count(); TKEYWORD(_IDATA); }
185 "..." { count(); return(VAR_ARGS);}
186 {L}({L}|{D})* { count(); return(check_type()); }
187 0[xX]{H}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
188 0{D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
189 {D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
190 '(\\.|[^\\'])+' { count();yylval.val = charVal (yytext); return(CONSTANT); }
191 {D}+{E}{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
192 {D}*"."{D}+({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
193 {D}+"."{D}*({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
194 \" { count(); yylval.val=strVal(stringLiteral()); return(STRING_LITERAL);}
195 ">>=" { count(); yylval.yyint = RIGHT_ASSIGN ; return(RIGHT_ASSIGN); }
196 "<<=" { count(); yylval.yyint = LEFT_ASSIGN ; return(LEFT_ASSIGN) ; }
197 "+=" { count(); yylval.yyint = ADD_ASSIGN ; return(ADD_ASSIGN) ; }
198 "-=" { count(); yylval.yyint = SUB_ASSIGN ; return(SUB_ASSIGN) ; }
199 "*=" { count(); yylval.yyint = MUL_ASSIGN ; return(MUL_ASSIGN) ; }
200 "/=" { count(); yylval.yyint = DIV_ASSIGN ; return(DIV_ASSIGN) ; }
201 "%=" { count(); yylval.yyint = MOD_ASSIGN ; return(MOD_ASSIGN) ; }
202 "&=" { count(); yylval.yyint = AND_ASSIGN ; return(AND_ASSIGN) ; }
203 "^=" { count(); yylval.yyint = XOR_ASSIGN ; return(XOR_ASSIGN) ; }
204 "|=" { count(); yylval.yyint = OR_ASSIGN ; return(OR_ASSIGN) ; }
205 ">>" { count(); return(RIGHT_OP); }
206 "<<" { count(); return(LEFT_OP); }
207 "++" { count(); return(INC_OP); }
208 "--" { count(); return(DEC_OP); }
209 "->" { count(); return(PTR_OP); }
210 "&&" { count(); return(AND_OP); }
211 "||" { count(); return(OR_OP); }
212 "<=" { count(); return(LE_OP); }
213 ">=" { count(); return(GE_OP); }
214 "==" { count(); return(EQ_OP); }
215 "!=" { count(); return(NE_OP); }
216 ";" { count(); return(';'); }
217 "{" { count(); NestLevel++ ; return('{'); }
218 "}" { count(); NestLevel--; 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 "|" { count(); return('|'); }
239 "?" { count(); return('?'); }
240 ^#line.*"\n" { count(); checkCurrFile(yytext); }
241 ^#pragma.*"\n" { count(); process_pragma(yytext); }
243 ^[^(]+"("[0-9]+") : error"[^\n]+ { werror(E_PRE_PROC_FAILED,yytext);count(); }
244 ^[^(]+"("[0-9]+") : warning"[^\n]+ { werror(W_PRE_PROC_WARNING,yytext);count(); }
247 [ \t\v\f] { count(); }
251 werror (W_STRAY_BACKSLASH, column);
258 int checkCurrFile ( char *s)
264 /* first check if this is a #line */
265 if ( strncmp(s,"#line",5) )
268 /* get to the line number */
275 sscanf(lineNum,"%d",&lNum);
277 /* now see if we have a file name */
278 while (*s != '\"' && *s)
281 /* if we don't have a filename then */
282 /* set the current line number to */
283 /* line number if printFlag is on */
289 /* if we have a filename then check */
290 /* if it is "standard in" if yes then */
291 /* get the currentfile name info */
294 if ( strncmp(s,fullSrcFileName,strlen(fullSrcFileName)) == 0) {
296 currFname = fullSrcFileName ;
299 /* mark the end of the filename */
300 while (*s != '"') s++;
302 currFname = Safe_calloc(1,strlen(sb)+1);
303 strcpy(currFname,sb);
306 filename = currFname ;
315 while ((c = input()) != '*' && c) {
321 if (c && (c1 = input()) != '/') {
335 for (i = 0; yytext[i] != '\0'; i++) {
336 if (yytext[i] == '\n') {
338 lineno = ++yylineno ;
341 if (yytext[i] == '\t')
342 column += 8 - (column % 8);
351 /* check if it is in the typedef table */
352 if (findSym(TypedefTab,NULL,yytext)) {
353 strcpy(yylval.yychar,yytext);
357 strcpy (yylval.yychar,yytext);
362 char strLitBuff[2048]; // TODO: this is asking for the next bug :)
365 * Change by JTV 2001-05-19 to not concantenate strings
366 * to support ANSI hex and octal escape sequences in string liteals
369 char *stringLiteral () {
371 char *str = strLitBuff;
374 /* put into the buffer till we hit the first \" */
380 break; /* end of input */
382 /* if it is a \ then escape char's are allowed */
386 // input() translates \n into \r\n
387 if ((ch=input())!='\n') {
390 /* \<newline> is a continuator */
394 *str++ = '\\'; /* backslash in place */
395 *str++ = ch; /* get the escape char, no further check */
396 continue; /* carry on */
399 /* if new line we have a new line break, which is illegal */
401 // input() translates \n into \r\n
402 if ((ch=input())!='\n') {
405 werror (W_NEWLINE_IN_STRING);
411 /* if this is a quote then we have work to do */
412 /* find the next non whitespace character */
413 /* if that is a double quote then carry on */
415 *str++ = ch ; /* Pass end of this string or substring to evaluator */
416 while ((ch = input()) && (isspace(ch) || ch=='\\')) {
434 *str++ = ch; /* Put next substring introducer into output string */
441 void doPragma (int op, char *cp)
445 memcpy(&save_options,&options,sizeof(options));
446 memcpy(&save_optimize,&optimize,sizeof(optimize));
449 memcpy(&options,&save_options,sizeof(options));
450 memcpy(&optimize,&save_optimize,sizeof(optimize));
453 optimize.loopInduction = 0 ;
456 optimize.loopInvariant = 0 ;
459 optimize.loopInduction = 1 ;
462 options.stackAuto = 1;
465 optimize.noJTabBoundary = 1;
468 optimize.global_cse = 0;
471 options.noOverlay = 1;
476 /* append to the functions already listed
478 for (; options.calleeSaves[i] ;i++);
479 parseWithComma(&options.calleeSaves[i],strdup(cp));
483 parseWithComma(options.excludeRegs,strdup(cp));
486 optimize.noLoopReverse = 1;
491 int process_pragma(char *s)
494 /* find the pragma */
495 while (strncmp(s,"#pragma",7))
499 /* look for the directive */
500 while(isspace(*s)) s++;
503 /* look for the end of the directive */
504 while ((! isspace(*s)) &&
508 /* First give the port a chance */
509 if (port->process_pragma && !port->process_pragma(cp))
512 /* now compare and do what needs to be done */
513 if (strncmp(cp,PRAGMA_SAVE,strlen(PRAGMA_SAVE)) == 0) {
514 doPragma(P_SAVE,cp+strlen(PRAGMA_SAVE));
518 if (strncmp(cp,PRAGMA_RESTORE,strlen(PRAGMA_RESTORE)) == 0) {
519 doPragma (P_RESTORE,cp+strlen(PRAGMA_RESTORE));
523 if (strncmp(cp,PRAGMA_NOINDUCTION,strlen(PRAGMA_NOINDUCTION)) == 0) {
524 doPragma (P_NOINDUCTION,cp+strlen(PRAGMA_NOINDUCTION)) ;
528 if (strncmp(cp,PRAGMA_NOINVARIANT,strlen(PRAGMA_NOINVARIANT)) == 0) {
529 doPragma (P_NOINVARIANT,NULL) ;
533 if (strncmp(cp,PRAGMA_INDUCTION,strlen(PRAGMA_INDUCTION)) == 0) {
534 doPragma (P_INDUCTION,NULL) ;
538 if (strncmp(cp,PRAGMA_STACKAUTO,strlen(PRAGMA_STACKAUTO)) == 0) {
539 doPragma (P_STACKAUTO,NULL);
543 if (strncmp(cp,PRAGMA_NOJTBOUND,strlen(PRAGMA_NOJTBOUND)) == 0) {
544 doPragma (P_NOJTBOUND,NULL);
548 if (strncmp(cp,PRAGMA_NOGCSE,strlen(PRAGMA_NOGCSE)) == 0) {
549 doPragma (P_NOGCSE,NULL);
553 if (strncmp(cp,PRAGMA_NOOVERLAY,strlen(PRAGMA_NOOVERLAY)) == 0) {
554 doPragma (P_NOOVERLAY,NULL);
558 if (strncmp(cp,PRAGMA_CALLEESAVES,strlen(PRAGMA_CALLEESAVES)) == 0) {
559 doPragma(P_CALLEE_SAVES,cp+strlen(PRAGMA_CALLEESAVES));
563 if (strncmp(cp,PRAGMA_EXCLUDE,strlen(PRAGMA_EXCLUDE)) == 0) {
564 doPragma(P_EXCLUDE,cp+strlen(PRAGMA_EXCLUDE));
568 if (strncmp(cp,PRAGMA_NOLOOPREV,strlen(PRAGMA_NOLOOPREV)) == 0) {
569 doPragma(P_EXCLUDE,NULL);
573 werror(W_UNKNOWN_PRAGMA,cp);
577 /* will return 1 if the string is a part
578 of a target specific keyword */
579 int isTargetKeyword(char *s)
583 if (port->keywords == NULL)
585 for ( i = 0 ; port->keywords[i] ; i++ ) {
586 if (strcmp(port->keywords[i],s) == 0)
593 extern int fatalError;
599 if (yylineno && filename)
600 fprintf(stdout,"\n%s(%d) %s: token -> '%s' ; column %d\n",