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 ;
88 asmp = asmbuff = realloc (asmbuff, INITIAL_INLINEASM);
89 asmbuffSize=INITIAL_INLINEASM;
95 yylval.yyinline = malloc (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 = 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 = realloc (asmbuff, asmbuffSize);
121 "at" { count(); TKEYWORD(AT) ; }
122 "auto" { count(); return(AUTO); }
123 "bit" { count(); TKEYWORD(BIT) ; }
124 "break" { count(); return(BREAK); }
125 "case" { count(); return(CASE); }
126 "char" { count(); return(CHAR); }
127 "code" { count(); TKEYWORD(CODE); }
128 "const" { count(); return(CONST); }
129 "continue" { count(); return(CONTINUE); }
130 "critical" { count(); TKEYWORD(CRITICAL); }
131 "data" { count(); TKEYWORD(DATA); }
132 "default" { count(); return(DEFAULT); }
133 "do" { count(); return(DO); }
134 "double" { count(); werror(W_DOUBLE_UNSUPPORTED);return(FLOAT); }
135 "else" { count(); return(ELSE); }
136 "enum" { count(); return(ENUM); }
137 "extern" { count(); return(EXTERN); }
138 "far" { count(); TKEYWORD(XDATA); }
139 "eeprom" { count(); TKEYWORD(EEPROM); }
140 "float" { count(); return(FLOAT); }
141 "flash" { count(); TKEYWORD(CODE);}
142 "for" { count(); return(FOR); }
143 "goto" { count(); return(GOTO); }
144 "idata" { count(); TKEYWORD(IDATA);}
145 "if" { count(); return(IF); }
146 "int" { count(); return(INT); }
147 "interrupt" { count(); return(INTERRUPT);}
148 "nonbanked" { count(); TKEYWORD(NONBANKED);}
149 "banked" { count(); TKEYWORD(BANKED);}
150 "long" { count(); return(LONG); }
151 "near" { count(); TKEYWORD(DATA);}
152 "pdata" { count(); TKEYWORD(PDATA); }
153 "reentrant" { count(); TKEYWORD(REENTRANT);}
154 "register" { count(); return(REGISTER); }
155 "return" { count(); return(RETURN); }
156 "sfr" { count(); TKEYWORD(SFR) ; }
157 "sbit" { count(); TKEYWORD(SBIT) ; }
158 "short" { count(); return(SHORT); }
159 "signed" { count(); return(SIGNED); }
160 "sizeof" { count(); return(SIZEOF); }
161 "sram" { count(); TKEYWORD(XDATA);}
162 "static" { count(); return(STATIC); }
163 "struct" { count(); return(STRUCT); }
164 "switch" { count(); return(SWITCH); }
165 "typedef" { count(); return(TYPEDEF); }
166 "union" { count(); return(UNION); }
167 "unsigned" { count(); return(UNSIGNED); }
168 "void" { count(); return(VOID); }
169 "volatile" { count(); return(VOLATILE); }
170 "using" { count(); TKEYWORD(USING); }
171 "_naked" { count(); TKEYWORD(NAKED); }
172 "while" { count(); return(WHILE); }
173 "xdata" { count(); TKEYWORD(XDATA); }
174 "..." { count(); return(VAR_ARGS);}
175 "__typeof" { count(); return TYPEOF;}
176 "_JavaNative" { count(); TKEYWORD(JAVANATIVE);}
177 "_overlay" { count(); TKEYWORD(OVERLAY);}
178 {L}({L}|{D})* { count(); return(check_type()); }
179 0[xX]{H}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
180 0{D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
181 {D}+{IS}? { count(); yylval.val = constVal(yytext); return(CONSTANT); }
182 '(\\.|[^\\'])+' { count();yylval.val = charVal (yytext); return(CONSTANT); /* ' make syntax highliter happy */}
183 {D}+{E}{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
184 {D}*"."{D}+({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
185 {D}+"."{D}*({E})?{FS}? { count(); yylval.val = constFloatVal(yytext);return(CONSTANT); }
186 \" { count(); yylval.val=strVal(stringLiteral()); return(STRING_LITERAL);}
187 ">>=" { count(); yylval.yyint = RIGHT_ASSIGN ; return(RIGHT_ASSIGN); }
188 "<<=" { count(); yylval.yyint = LEFT_ASSIGN ; return(LEFT_ASSIGN) ; }
189 "+=" { count(); yylval.yyint = ADD_ASSIGN ; return(ADD_ASSIGN) ; }
190 "-=" { count(); yylval.yyint = SUB_ASSIGN ; return(SUB_ASSIGN) ; }
191 "*=" { count(); yylval.yyint = MUL_ASSIGN ; return(MUL_ASSIGN) ; }
192 "/=" { count(); yylval.yyint = DIV_ASSIGN ; return(DIV_ASSIGN) ; }
193 "%=" { count(); yylval.yyint = MOD_ASSIGN ; return(MOD_ASSIGN) ; }
194 "&=" { count(); yylval.yyint = AND_ASSIGN ; return(AND_ASSIGN) ; }
195 "^=" { count(); yylval.yyint = XOR_ASSIGN ; return(XOR_ASSIGN) ; }
196 "|=" { count(); yylval.yyint = OR_ASSIGN ; return(OR_ASSIGN) ; }
197 ">>" { count(); return(RIGHT_OP); }
198 "<<" { count(); return(LEFT_OP); }
199 "++" { count(); return(INC_OP); }
200 "--" { count(); return(DEC_OP); }
201 "->" { count(); return(PTR_OP); }
202 "&&" { count(); return(AND_OP); }
203 "||" { count(); return(OR_OP); }
204 "<=" { count(); return(LE_OP); }
205 ">=" { count(); return(GE_OP); }
206 "==" { count(); return(EQ_OP); }
207 "!=" { count(); return(NE_OP); }
208 ";" { count(); return(';'); }
209 "{" { count(); NestLevel++ ; return('{'); }
210 "}" { count(); NestLevel--; return('}'); }
211 "," { count(); 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 ^#line.*"\n" { count(); checkCurrFile(yytext); }
233 ^#pragma.*"\n" { count(); process_pragma(yytext); }
235 ^[^(]+"("[0-9]+") : error"[^\n]+ { werror(E_PRE_PROC_FAILED,yytext);count(); }
236 ^[^(]+"("[0-9]+") : warning"[^\n]+ { werror(W_PRE_PROC_WARNING,yytext);count(); }
239 [ \t\v\f] { count(); }
243 // that could have been removed by the preprocessor anyway
244 werror (W_STRAY_BACKSLASH, column);
251 int checkCurrFile ( char *s)
257 /* first check if this is a #line */
258 if ( strncmp(s,"#line",5) )
261 /* get to the line number */
268 sscanf(lineNum,"%d",&lNum);
270 /* now see if we have a file name */
271 while (*s != '\"' && *s)
274 /* if we don't have a filename then */
275 /* set the current line number to */
276 /* line number if printFlag is on */
278 lineno = yylineno = lNum ;
282 /* if we have a filename then check */
283 /* if it is "standard in" if yes then */
284 /* get the currentfile name info */
287 if ( strncmp(s,fullSrcFileName,strlen(fullSrcFileName)) == 0) {
288 lineno = yylineno = lNum;
289 currFname = fullSrcFileName ;
292 /* mark the end of the filename */
293 while (*s != '"') s++;
295 currFname = malloc (strlen(sb)+1);
296 strcpy(currFname,sb);
297 lineno = yylineno = lNum;
299 filename = currFname ;
309 for (i = 0; yytext[i] != '\0'; i++) {
310 if (yytext[i] == '\n') {
312 lineno = ++yylineno ;
315 if (yytext[i] == '\t')
316 column += 8 - (column % 8);
325 /* check if it is in the typedef table */
326 if (findSym(TypedefTab,NULL,yytext)) {
327 strcpy(yylval.yychar,yytext);
331 strcpy (yylval.yychar,yytext);
336 char strLitBuff[2048]; // TODO: this is asking for the next bug :)
339 * Change by JTV 2001-05-19 to not concantenate strings
340 * to support ANSI hex and octal escape sequences in string liteals
343 char *stringLiteral () {
345 char *str = strLitBuff;
348 /* put into the buffer till we hit the first \" */
354 break; /* end of input */
356 /* if it is a \ then escape char's are allowed */
360 /* \<newline> is a continuator */
365 *str++ = '\\'; /* backslash in place */
366 *str++ = ch; /* get the escape char, no further check */
367 continue; /* carry on */
370 /* if new line we have a new line break, which is illegal */
372 werror (W_NEWLINE_IN_STRING);
379 /* if this is a quote then we have work to do */
380 /* find the next non whitespace character */
381 /* if that is a double quote then carry on */
383 *str++ = ch ; /* Pass end of this string or substring to evaluator */
384 while ((ch = input()) && (isspace(ch) || ch=='\\')) {
387 if ((ch=input())!='\n') {
388 werror (W_STRAY_BACKSLASH, column);
409 *str++ = ch; /* Put next substring introducer into output string */
416 void doPragma (int op, char *cp)
420 memcpy(&save_options,&options,sizeof(options));
421 memcpy(&save_optimize,&optimize,sizeof(optimize));
424 memcpy(&options,&save_options,sizeof(options));
425 memcpy(&optimize,&save_optimize,sizeof(optimize));
428 optimize.loopInduction = 0 ;
431 optimize.loopInvariant = 0 ;
434 optimize.loopInduction = 1 ;
437 options.stackAuto = 1;
440 optimize.noJTabBoundary = 1;
443 optimize.global_cse = 0;
446 options.noOverlay = 1;
451 /* append to the functions already listed
453 for (; options.calleeSaves[i] ;i++);
454 parseWithComma(&options.calleeSaves[i], Safe_strdup(cp));
458 parseWithComma(options.excludeRegs, Safe_strdup(cp));
461 optimize.noLoopReverse = 1;
468 int process_pragma(char *s)
471 /* find the pragma */
472 while (strncmp(s,"#pragma",7))
476 /* look for the directive */
477 while(isspace(*s)) s++;
480 /* look for the end of the directive */
481 while ((! isspace(*s)) &&
485 /* First give the port a chance */
486 if (port->process_pragma && !port->process_pragma(cp))
489 /* now compare and do what needs to be done */
490 if (strncmp(cp,PRAGMA_SAVE,strlen(PRAGMA_SAVE)) == 0) {
491 doPragma(P_SAVE,cp+strlen(PRAGMA_SAVE));
495 if (strncmp(cp,PRAGMA_RESTORE,strlen(PRAGMA_RESTORE)) == 0) {
496 doPragma (P_RESTORE,cp+strlen(PRAGMA_RESTORE));
500 if (strncmp(cp,PRAGMA_NOINDUCTION,strlen(PRAGMA_NOINDUCTION)) == 0) {
501 doPragma (P_NOINDUCTION,cp+strlen(PRAGMA_NOINDUCTION)) ;
505 if (strncmp(cp,PRAGMA_NOINVARIANT,strlen(PRAGMA_NOINVARIANT)) == 0) {
506 doPragma (P_NOINVARIANT,NULL) ;
510 if (strncmp(cp,PRAGMA_INDUCTION,strlen(PRAGMA_INDUCTION)) == 0) {
511 doPragma (P_INDUCTION,NULL) ;
515 if (strncmp(cp,PRAGMA_STACKAUTO,strlen(PRAGMA_STACKAUTO)) == 0) {
516 doPragma (P_STACKAUTO,NULL);
520 if (strncmp(cp,PRAGMA_NOJTBOUND,strlen(PRAGMA_NOJTBOUND)) == 0) {
521 doPragma (P_NOJTBOUND,NULL);
525 if (strncmp(cp,PRAGMA_NOGCSE,strlen(PRAGMA_NOGCSE)) == 0) {
526 doPragma (P_NOGCSE,NULL);
530 if (strncmp(cp,PRAGMA_NOOVERLAY,strlen(PRAGMA_NOOVERLAY)) == 0) {
531 doPragma (P_NOOVERLAY,NULL);
535 if (strncmp(cp,PRAGMA_CALLEESAVES,strlen(PRAGMA_CALLEESAVES)) == 0) {
536 doPragma(P_CALLEE_SAVES,cp+strlen(PRAGMA_CALLEESAVES));
540 if (strncmp(cp,PRAGMA_EXCLUDE,strlen(PRAGMA_EXCLUDE)) == 0) {
541 doPragma(P_EXCLUDE,cp+strlen(PRAGMA_EXCLUDE));
545 if (strncmp(cp,PRAGMA_NOLOOPREV,strlen(PRAGMA_NOLOOPREV)) == 0) {
546 doPragma(P_LOOPREV,NULL);
550 werror(W_UNKNOWN_PRAGMA,cp);
554 /* will return 1 if the string is a part
555 of a target specific keyword */
556 int isTargetKeyword(char *s)
560 if (port->keywords == NULL)
562 for ( i = 0 ; port->keywords[i] ; i++ ) {
563 if (strcmp(port->keywords[i],s) == 0)
570 extern int fatalError;
576 if (yylineno && filename) {
577 fprintf(stdout,"\n%s:%d: %s: token -> '%s' ; column %d\n",
582 // this comes from an empy file, no problem