started integrating expression ast
[swftools.git] / lib / as3 / tokenizer.lex
1 /* tokenizer.lex
2
3    Routines for compiling Flash2 AVM2 ABC Actionscript
4
5    Extension module for the rfxswf library.
6    Part of the swftools package.
7
8    Copyright (c) 2008 Matthias Kramm <kramm@quiss.org>
9  
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 2 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
23 %{
24
25
26 #include <string.h>
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <stdarg.h>
30 #include "../utf8.h"
31 #include "common.h"
32 #include "tokenizer.h"
33 #include "files.h"
34
35 unsigned int as3_tokencount = 0;
36
37 static void dbg(const char*format, ...)
38 {
39     char buf[1024];
40     int l;
41     va_list arglist;
42     if(as3_verbosity<3)
43         return;
44     va_start(arglist, format);
45     vsprintf(buf, format, arglist);
46     va_end(arglist);
47     l = strlen(buf);
48     while(l && buf[l-1]=='\n') {
49         buf[l-1] = 0;
50         l--;
51     }
52     printf("(tokenizer) ");
53     printf("%s\n", buf);
54     fflush(stdout);
55 }
56
57 #ifndef YY_CURRENT_BUFFER
58 #define YY_CURRENT_BUFFER yy_current_buffer
59 #endif
60
61 static void*as3_buffer=0;
62 static int as3_buffer_pos=0;
63 static int as3_buffer_len=0;
64 void as3_file_input(FILE*fi)
65 {
66     as3_in = fi;
67     as3_buffer = 0;
68 }
69 void as3_buffer_input(void*buffer, int len)
70 {
71     if(!buffer)
72         syntaxerror("trying to parse zero bytearray");
73     as3_buffer = buffer;
74     as3_buffer_len = len;
75     as3_buffer_pos = 0;
76     as3_in = 0;
77 }
78
79 #define YY_INPUT(buf,result,max_size) { \
80   if(!as3_buffer) { \
81       errno=0; \
82       while((result = fread(buf, 1, max_size, as3_in))==0 && ferror(as3_in)) \
83       { if(errno != EINTR) {YY_FATAL_ERROR("input in flex scanner failed"); break;} \
84         errno=0; clearerr(as3_in); \
85       } \
86   } else { \
87       int to_read = max_size; \
88       if(to_read + as3_buffer_pos > as3_buffer_len) \
89           to_read = as3_buffer_len - as3_buffer_pos; \
90       memcpy(buf, as3_buffer+as3_buffer_pos, to_read); \
91       as3_buffer_pos += to_read; \
92       result=to_read; \
93   } \
94 }
95
96 void handleInclude(char*text, int len, char quotes)
97 {
98     char*filename = 0;
99     if(quotes) {
100         char*p1 = strchr(text, '"');
101         char*p2 = strrchr(text, '"');
102         if(!p1 || !p2 || p1==p2) {
103             syntaxerror("Invalid include in line %d\n", current_line);
104         }
105         *p2 = 0;
106         filename = strdup(p1+1);
107     } else {
108         int i1=0,i2=len;
109         // find start
110         while(!strchr(" \n\r\t", text[i1])) i1++;
111         // strip
112         while(strchr(" \n\r\t", text[i1])) i1++;
113         while(strchr(" \n\r\t", text[i2-1])) i2--;
114         if(i2!=len) text[i2]=0;
115         filename = strdup(&text[i1]);
116     }
117     
118     char*fullfilename = find_file(filename, 1);
119     enter_file2(filename, fullfilename, YY_CURRENT_BUFFER);
120     yyin = fopen(fullfilename, "rb");
121     if (!yyin) {
122         syntaxerror("Couldn't open include file \"%s\"\n", fullfilename);
123     }
124
125     yy_switch_to_buffer(yy_create_buffer( yyin, YY_BUF_SIZE ) );
126     //BEGIN(INITIAL); keep context
127 }
128
129 static int do_unescape(const char*s, const char*end, char*n) 
130 {
131     char*o = n;
132     int len=0;
133     while(s<end) {
134         if(*s!='\\') {
135             if(o) o[len] = *s;len++;
136             s++;
137             continue;
138         }
139         s++; //skip past '\'
140         if(s==end) syntaxerror("invalid \\ at end of string");
141
142         /* handle the various line endings (mac, dos, unix) */
143         if(*s=='\r') { 
144             s++; 
145             if(s==end) break;
146             if(*s=='\n') 
147                 s++;
148             continue;
149         }
150         if(*s=='\n')  {
151             s++;
152             continue;
153         }
154         switch(*s) {
155             case '\\': if(o) o[len] = '\\';s++;len++; break;
156             case '"': if(o) o[len] = '"';s++;len++; break;
157             case '\'': if(o) o[len] = '\'';s++;len++; break;
158             case 'b': if(o) o[len] = '\b';s++;len++; break;
159             case 'f': if(o) o[len] = '\f';s++;len++; break;
160             case 'n': if(o) o[len] = '\n';s++;len++; break;
161             case 'r': if(o) o[len] = '\r';s++;len++; break;
162             case 't': if(o) o[len] = '\t';s++;len++; break;
163             case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': {
164                 unsigned int num=0;
165                 int nr = 0;
166                 while(strchr("01234567", *s) && nr<3 && s<end) {
167                     num <<= 3;
168                     num |= *s-'0';
169                     nr++;
170                     s++;
171                 }
172                 if(num>256) 
173                     syntaxerror("octal number out of range (0-255): %d", num);
174                 if(o) o[len] = num;len++;
175                 continue;
176             }
177             case 'x': case 'u': {
178                 int max=2;
179                 char bracket = 0;
180                 char unicode = 0;
181                 if(*s == 'u') {
182                     max = 6;
183                     unicode = 1;
184                 }
185                 s++;
186                 if(s==end) syntaxerror("invalid \\u or \\x at end of string");
187                 if(*s == '{')  {
188                     s++;
189                     if(s==end) syntaxerror("invalid \\u{ at end of string");
190                     bracket=1;
191                 }
192                 unsigned int num=0;
193                 int nr = 0;
194                 while(strchr("0123456789abcdefABCDEF", *s) && (bracket || nr < max) && s<end) {
195                     num <<= 4;
196                     if(*s>='0' && *s<='9') num |= *s - '0';
197                     if(*s>='a' && *s<='f') num |= *s - 'a' + 10;
198                     if(*s>='A' && *s<='F') num |= *s - 'A' + 10;
199                     nr++;
200                     s++;
201                 }
202                 if(bracket) {
203                     if(*s=='}' && s<end) {
204                         s++;
205                     } else {
206                         syntaxerror("missing terminating '}'");
207                     }
208                 }
209                 if(unicode) {
210                     char*utf8 = getUTF8(num);
211                     while(*utf8) {
212                         if(o) o[len] = *utf8;utf8++;len++;
213                     }
214                 } else {
215                     if(num>256) 
216                         syntaxerror("byte out of range (0-255): %d", num);
217                     if(o) o[len] = num;len++;
218                 }
219                 break;
220             }
221             default: {
222                 if(o) {
223                     o[len+0] = '\\';
224                     o[len+1] = *s;
225                 }
226                 s++;
227                 len+=2;
228                 break;
229             }
230         }
231     }
232     if(o) o[len]=0;
233     return len;
234 }
235
236 static string_t string_unescape(const char*in, int l)
237 {
238     const char*s = in;
239     const char*end = &in[l];
240
241     int len = do_unescape(s, end, 0);
242     char*n = (char*)malloc(len+1);
243     do_unescape(s, end, n);
244     string_t out = string_new(n, len);
245     return out; 
246 }
247
248 static void handleCData(char*s, int len)
249 {
250     a3_lval.str.str = s+9;    // <![CDATA[
251     a3_lval.str.len = len-9-3;// ]]>
252     a3_lval.str.str = strdup_n(a3_lval.str.str, a3_lval.str.len);
253 }
254
255 static void handleString(char*s, int len)
256 {
257     if(s[0]=='"') {
258         if(s[len-1]!='"') syntaxerror("String doesn't end with '\"'");
259         s++;len-=2;
260     }
261     else if(s[0]=='\'') {
262         if(s[len-1]!='\'') syntaxerror("String doesn't end with '\"'");
263         s++;len-=2;
264     }
265     else syntaxerror("String incorrectly terminated");
266     
267     a3_lval.str = string_unescape(s, len);
268 }
269
270
271 char start_of_expression;
272
273 static inline int m(int type)
274 {
275     a3_lval.token = type;
276     return type;
277 }
278
279
280 static char numberbuf[64];
281 static char*nrbuf()
282 {
283     if(yyleng>sizeof(numberbuf)-1)
284         syntaxerror("decimal number overflow");
285     char*s = numberbuf;
286     memcpy(s, yytext, yyleng);
287     s[yyleng]=0;
288     return s;
289 }
290
291 static inline int setint(int v)
292 {
293     a3_lval.number_int = v;
294     return T_INT;
295 }
296 static inline int setfloat(double v)
297 {
298     a3_lval.number_float = v;
299     return T_FLOAT;
300 }
301
302 static inline int handlefloat()
303 {
304     char*s = nrbuf();
305     a3_lval.number_float = atof(s);
306     return T_FLOAT;
307 }
308
309 static inline int handleint()
310 {
311     char*s = nrbuf();
312     char l = (yytext[0]=='-');
313
314     //char*max = l?"1073741824":"2147483647";
315     char*max = l?"2147483648":"2147483647";
316
317     if(yyleng-l>10) {
318         as3_softwarning("integer overflow: %s (converted to Number)", s);
319         return handlefloat();
320     }
321     if(yyleng-l==10) {
322         int t;
323         for(t=0;t<yyleng-l;t++) {
324             if(yytext[l+t]>max[t]) {
325                 as3_softwarning("integer overflow: %s (converted to Number)", s);
326                 return handlefloat();
327             }
328             else if(yytext[l+t]<max[t])
329                 break;
330         }
331     }
332     if(yytext[0]=='-') {
333         int v = atoi(s);
334         return setint(v);
335     } else {
336         unsigned int v = 0;
337         int t;
338         for(t=0;t<yyleng;t++) {
339             v*=10;
340             v+=yytext[t]-'0';
341         }
342         return setint(v);
343     }
344 }
345
346 static inline int handlehexfloat()
347 {
348     char l = (yytext[0]=='-')+2;
349     double d=0;
350     char dot=0;
351     double base=1;
352     int t;
353     for(t=l;t<yyleng;t++) {
354         char c = yytext[t];
355         if(c=='.') {
356             dot=1;
357             continue;
358         }
359         if(!dot) {
360             d*=16;
361         } else {
362             base*=1/16.0;
363         }
364         if(c>='0' && c<='9')
365             d+=(c&15)*base;
366         else if((c>='a' && c<='f') || (c>='A' && c<='F'))
367             d+=((c&0x0f)+9)*base;
368     }
369     return setfloat(d);
370 }
371 static inline int handlehex()
372 {
373     char l = (yytext[0]=='-')+2;
374     int len = yyleng;
375
376     if(len-l>8) {
377         char*s = nrbuf();
378         syntaxerror("integer overflow %s", s);
379     }
380
381     int t;
382     unsigned int v = 0;
383     for(t=l;t<len;t++) {
384         v<<=4;
385         char c = yytext[t];
386         if(c>='0' && c<='9')
387             v|=(c&15);
388         else if((c>='a' && c<='f') || (c>='A' && c<='F'))
389             v|=(c&0x0f)+9;
390     }
391     if(l && v>=0x80000000) {
392         char*s = nrbuf();
393         as3_softwarning("integer overflow: %s (converted to Number)", s);
394         return setfloat(v);
395     }
396     if(!l && v>0x7fffffff) {
397         char*s = nrbuf();
398         as3_softwarning("integer overflow: %s (converted to Number)", s);
399         return setfloat(v);
400     }
401
402     if(l==3) {
403         return setint(-(int)v);
404     } else {
405         return setint(v);
406     }
407 }
408
409 void handleLabel(char*text, int len)
410 {
411     int t;
412     for(t=len-1;t>=0;--t) {
413         if(text[t]!=' ' &&
414            text[t]!=':')
415             break;
416     }
417     char*s = malloc(t+1);
418     memcpy(s, yytext, t);
419     s[t]=0;
420     a3_lval.id = s;
421 }
422
423 static int handleregexp()
424 {
425     char*s = malloc(yyleng);
426     int len=yyleng-1;
427     memcpy(s, yytext+1, len);
428     s[len] = 0;
429     int t;
430     for(t=len;t>=0;--t) {
431         if(s[t]=='/') {
432             s[t] = 0;
433             break;
434         }
435     }
436     a3_lval.regexp.pattern = s;
437     if(t==len) {
438         a3_lval.regexp.options = 0;
439     } else {
440         a3_lval.regexp.options = s+t+1;
441     }
442     return T_REGEXP;
443 }
444
445 void initialize_scanner();
446 #define YY_USER_INIT initialize_scanner();
447
448 /* count the number of lines+columns consumed by this token */
449 static inline void l() {
450     int t;
451     for(t=0;t<yyleng;t++) {
452         if(yytext[t]=='\n') {
453             current_line++;
454             current_column=0;
455         } else {
456             current_column++;
457         }
458     }
459 }
460 /* count the number of columns consumed by this token */
461 static inline void c() {
462     current_column+=yyleng;
463 }
464
465 trie_t*active_namespaces = 0;
466 /*void tokenizer_register_namespace(const char*id)
467 {
468     trie_put(namespaces, id, 0);
469 }
470 void tokenizer_unregister_namespace(const char*id)
471 {
472     trie_remove(namespaces, id);
473 }*/
474 static inline tokenizer_is_namespace(const char*id)
475 {
476     return trie_contains(active_namespaces, id);
477 }
478
479 static inline int handleIdentifier()
480 {
481     char*s = malloc(yyleng+1);
482     memcpy(s, yytext, yyleng);
483     s[yyleng]=0;
484     a3_lval.id = s;
485     if(tokenizer_is_namespace(s)) 
486         return T_NAMESPACE;
487     else
488         return T_IDENTIFIER;
489 }
490
491
492 //Boolean                      {c();return m(KW_BOOLEAN);}
493 //int                          {c();return m(KW_INT);}
494 //uint                         {c();return m(KW_UINT);}
495 //Number                       {c();return m(KW_NUMBER);}
496
497 %}
498
499 %s REGEXPOK
500 %s BEGINNING
501
502 NAME     [a-zA-Z_][a-zA-Z0-9_\\]*
503 _        [^a-zA-Z0-9_\\]
504
505 HEXINT    0x[a-zA-Z0-9]+
506 HEXFLOAT  0x[a-zA-Z0-9]*\.[a-zA-Z0-9]*
507 INT       [0-9]+
508 FLOAT     ([0-9]+(\.[0-9]*)?|\.[0-9]+)(e[0-9]+)?
509
510 HEXWITHSIGN [+-]?({HEXINT})
511 HEXFLOATWITHSIGN [+-]?({HEXFLOAT})
512 INTWITHSIGN [+-]?({INT})
513 FLOATWITHSIGN [+-]?({FLOAT})
514
515 CDATA    <!\[CDATA\[([^]]|\][^]]|\]\][^>])*\]*\]\]\>
516 STRING   ["](\\[\x00-\xff]|[^\\"\n])*["]|['](\\[\x00-\xff]|[^\\'\n])*[']
517 S        [ \n\r\t]
518 MULTILINE_COMMENT [/][*]+([*][^/]|[^/*]|[^*][/]|[\x00-\x1f])*[*]+[/]
519 SINGLELINE_COMMENT \/\/[^\n\r]*[\n\r]
520 REGEXP   [/]([^/\n]|\\[/])*[/][a-zA-Z]*
521 %%
522
523
524 {SINGLELINE_COMMENT}         {l(); /* single line comment */}
525 {MULTILINE_COMMENT}          {l(); /* multi line comment */}
526 [/][*]                       {syntaxerror("syntax error: unterminated comment", yytext);}
527
528 ^include{S}+{STRING}{S}*/\n    {l();handleInclude(yytext, yyleng, 1);}
529 ^include{S}+[^" \t\r\n][\x20-\xff]*{S}*/\n    {l();handleInclude(yytext, yyleng, 0);}
530 {STRING}                     {l(); BEGIN(INITIAL);handleString(yytext, yyleng);return T_STRING;}
531 {CDATA}                      {l(); BEGIN(INITIAL);handleCData(yytext, yyleng);return T_STRING;}
532
533 <BEGINNING,REGEXPOK>{
534 {REGEXP}                     {c(); BEGIN(INITIAL);return handleregexp();} 
535 {HEXWITHSIGN}/{_}            {c(); BEGIN(INITIAL);return handlehex();}
536 {HEXFLOATWITHSIGN}/{_}       {c(); BEGIN(INITIAL);return handlehexfloat();}
537 {INTWITHSIGN}/{_}            {c(); BEGIN(INITIAL);return handleint();}
538 {FLOATWITHSIGN}/{_}          {c(); BEGIN(INITIAL);return handlefloat();}
539 }
540
541 <REGEXPOK>[\{]               {c(); BEGIN(REGEXPOK);return m(T_DICTSTART);}
542 [\{]                         {c(); BEGIN(INITIAL); return m('{');}
543
544 \xef\xbb\xbf                 {/* utf 8 bom */}
545 {S}                          {l();}
546
547 {HEXINT}/{_}                 {c(); BEGIN(INITIAL);return handlehex();}
548 {HEXFLOAT}/{_}               {c(); BEGIN(INITIAL);return handlehexfloat();}
549 {INT}/{_}                    {c(); BEGIN(INITIAL);return handleint();}
550 {FLOAT}/{_}                  {c(); BEGIN(INITIAL);return handlefloat();}
551 NaN                          {c(); BEGIN(INITIAL);return m(KW_NAN);}
552
553 3rr0r                        {/* for debugging: generates a tokenizer-level error */
554                               syntaxerror("3rr0r");}
555
556 {NAME}{S}*:{S}*for/{_}       {l();BEGIN(INITIAL);handleLabel(yytext, yyleng-3);return T_FOR;}
557 {NAME}{S}*:{S}*do/{_}        {l();BEGIN(INITIAL);handleLabel(yytext, yyleng-2);return T_DO;}
558 {NAME}{S}*:{S}*while/{_}     {l();BEGIN(INITIAL);handleLabel(yytext, yyleng-5);return T_WHILE;}
559 {NAME}{S}*:{S}*switch/{_}    {l();BEGIN(INITIAL);handleLabel(yytext, yyleng-6);return T_SWITCH;}
560 for                          {c();BEGIN(INITIAL);a3_lval.id="";return T_FOR;}
561 do                           {c();BEGIN(INITIAL);a3_lval.id="";return T_DO;}
562 while                        {c();BEGIN(INITIAL);a3_lval.id="";return T_WHILE;}
563 switch                       {c();BEGIN(INITIAL);a3_lval.id="";return T_SWITCH;}
564
565 [&][&]                       {c();BEGIN(REGEXPOK);return m(T_ANDAND);}
566 [|][|]                       {c();BEGIN(REGEXPOK);return m(T_OROR);}
567 [!][=]                       {c();BEGIN(REGEXPOK);return m(T_NE);}
568 [!][=][=]                    {c();BEGIN(REGEXPOK);return m(T_NEE);}
569 [=][=][=]                    {c();BEGIN(REGEXPOK);return m(T_EQEQEQ);}
570 [=][=]                       {c();BEGIN(REGEXPOK);return m(T_EQEQ);}
571 [>][=]                       {c();BEGIN(REGEXPOK);return m(T_GE);}
572 [<][=]                       {c();BEGIN(REGEXPOK);return m(T_LE);}
573 [-][-]                       {c();BEGIN(INITIAL);return m(T_MINUSMINUS);}
574 [+][+]                       {c();BEGIN(INITIAL);return m(T_PLUSPLUS);}
575 [+][=]                       {c();BEGIN(REGEXPOK);return m(T_PLUSBY);}
576 [\^][=]                      {c();BEGIN(REGEXPOK);return m(T_XORBY);}
577 [-][=]                       {c();BEGIN(REGEXPOK);return m(T_MINUSBY);}
578 [/][=]                       {c();BEGIN(REGEXPOK);return m(T_DIVBY);}
579 [%][=]                       {c();BEGIN(REGEXPOK);return m(T_MODBY);}
580 [*][=]                       {c();BEGIN(REGEXPOK);return m(T_MULBY);}
581 [|][=]                       {c();BEGIN(REGEXPOK);return m(T_ORBY);}
582 [>][>][=]                    {c();BEGIN(REGEXPOK);return m(T_SHRBY);}
583 [<][<][=]                    {c();BEGIN(REGEXPOK);return m(T_SHLBY);}
584 [>][>][>][=]                 {c();BEGIN(REGEXPOK);return m(T_USHRBY);}
585 [<][<]                       {c();BEGIN(REGEXPOK);return m(T_SHL);}
586 [>][>][>]                    {c();BEGIN(REGEXPOK);return m(T_USHR);}
587 [>][>]                       {c();BEGIN(REGEXPOK);return m(T_SHR);}
588 \.\.\.                       {c();BEGIN(REGEXPOK);return m(T_DOTDOTDOT);}
589 \.\.                         {c();BEGIN(REGEXPOK);return m(T_DOTDOT);}
590 \.                           {c();BEGIN(REGEXPOK);return m('.');}
591 ::                           {c();BEGIN(REGEXPOK);return m(T_COLONCOLON);}
592 :                            {c();BEGIN(REGEXPOK);return m(':');}
593 instanceof                   {c();BEGIN(REGEXPOK);return m(KW_INSTANCEOF);}
594 implements                   {c();BEGIN(REGEXPOK);return m(KW_IMPLEMENTS);}
595 interface                    {c();BEGIN(INITIAL);return m(KW_INTERFACE);}
596 namespace                    {c();BEGIN(INITIAL);return m(KW_NAMESPACE);}
597 protected                    {c();BEGIN(INITIAL);return m(KW_PROTECTED);}
598 undefined                    {c();BEGIN(INITIAL);return m(KW_UNDEFINED);}
599 continue                     {c();BEGIN(INITIAL);return m(KW_CONTINUE);}
600 override                     {c();BEGIN(INITIAL);return m(KW_OVERRIDE);}
601 internal                     {c();BEGIN(INITIAL);return m(KW_INTERNAL);}
602 function                     {c();BEGIN(INITIAL);return m(KW_FUNCTION);}
603 finally                      {c();BEGIN(INITIAL);return m(KW_FINALLY);}
604 default                      {c();BEGIN(INITIAL);return m(KW_DEFAULT);}
605 package                      {c();BEGIN(INITIAL);return m(KW_PACKAGE);}
606 private                      {c();BEGIN(INITIAL);return m(KW_PRIVATE);}
607 dynamic                      {c();BEGIN(INITIAL);return m(KW_DYNAMIC);}
608 extends                      {c();BEGIN(INITIAL);return m(KW_EXTENDS);}
609 delete                       {c();BEGIN(REGEXPOK);return m(KW_DELETE);}
610 return                       {c();BEGIN(REGEXPOK);return m(KW_RETURN);}
611 public                       {c();BEGIN(INITIAL);return m(KW_PUBLIC);}
612 native                       {c();BEGIN(INITIAL);return m(KW_NATIVE);}
613 static                       {c();BEGIN(INITIAL);return m(KW_STATIC);}
614 import                       {c();BEGIN(REGEXPOK);return m(KW_IMPORT);}
615 typeof                       {c();BEGIN(REGEXPOK);return m(KW_TYPEOF);}
616 throw                        {c();BEGIN(REGEXPOK);return m(KW_THROW);}
617 class                        {c();BEGIN(INITIAL);return m(KW_CLASS);}
618 const                        {c();BEGIN(INITIAL);return m(KW_CONST);}
619 catch                        {c();BEGIN(INITIAL);return m(KW_CATCH);}
620 final                        {c();BEGIN(INITIAL);return m(KW_FINAL);}
621 false                        {c();BEGIN(INITIAL);return m(KW_FALSE);}
622 break                        {c();BEGIN(INITIAL);return m(KW_BREAK);}
623 super                        {c();BEGIN(INITIAL);return m(KW_SUPER);}
624 each                         {c();BEGIN(INITIAL);return m(KW_EACH);}
625 void                         {c();BEGIN(INITIAL);return m(KW_VOID);}
626 true                         {c();BEGIN(INITIAL);return m(KW_TRUE);}
627 null                         {c();BEGIN(INITIAL);return m(KW_NULL);}
628 else                         {c();BEGIN(INITIAL);return m(KW_ELSE);}
629 case                         {c();BEGIN(REGEXPOK);return m(KW_CASE);}
630 with                         {c();BEGIN(REGEXPOK);return m(KW_WITH);}
631 use                          {c();BEGIN(REGEXPOK);return m(KW_USE);}
632 new                          {c();BEGIN(REGEXPOK);return m(KW_NEW);}
633 get                          {c();BEGIN(INITIAL);return m(KW_GET);}
634 set                          {c();BEGIN(INITIAL);return m(KW_SET);}
635 var                          {c();BEGIN(INITIAL);return m(KW_VAR);}
636 try                          {c();BEGIN(INITIAL);return m(KW_TRY);}
637 is                           {c();BEGIN(REGEXPOK);return m(KW_IS) ;}
638 in                           {c();BEGIN(REGEXPOK);return m(KW_IN) ;}
639 if                           {c();BEGIN(INITIAL);return m(KW_IF) ;}
640 as                           {c();BEGIN(REGEXPOK);return m(KW_AS);}
641 $?{NAME}                       {c();BEGIN(INITIAL);return handleIdentifier();}
642
643 [\]\}*]                       {c();BEGIN(INITIAL);return m(yytext[0]);}
644 [+-\/^~@$!%&\(=\[|?:;,<>]   {c();BEGIN(REGEXPOK);return m(yytext[0]);}
645 [\)\]]                           {c();BEGIN(INITIAL);return m(yytext[0]);}
646
647 .                            {/* ERROR */
648                               char c1=yytext[0];
649                               char buf[128];
650                               buf[0] = yytext[0];
651                               int t;
652                               for(t=1;t<128;t++) {
653                                   char c = buf[t]=input();
654                                   if(c=='\n' || c==EOF)  {
655                                       buf[t] = 0;
656                                       break;
657                                   }
658                               }
659                               if(c1>='0' && c1<='9')
660                                   syntaxerror("syntax error: %s (identifiers must not start with a digit)");
661                               else
662                                   syntaxerror("syntax error: %s", buf);
663                               printf("\n");
664                               exit(1);
665                               yyterminate();
666                              }
667 <<EOF>>                      {l();
668                               void*b = leave_file();
669                               if (!b) {
670                                  yyterminate();
671                                  yy_delete_buffer(YY_CURRENT_BUFFER);
672                                  return m(T_EOF);
673                               } else {
674                                   yy_delete_buffer(YY_CURRENT_BUFFER);
675                                   yy_switch_to_buffer(b);
676                               }
677                              }
678
679 %%
680
681 int yywrap()
682 {
683     return 1;
684 }
685
686 static char mbuf[256];
687 char*token2string(enum yytokentype nr, YYSTYPE v)
688 {
689     if(nr==T_STRING) {
690         char*s = malloc(v.str.len+10);
691         strcpy(s, "<string>");
692         memcpy(s+8, v.str.str, v.str.len);
693         sprintf(s+8+v.str.len, " (%d bytes)", v.str.len);
694         return s;
695     }
696     else if(nr==T_REGEXP) {
697         char*s = malloc(strlen(v.regexp.pattern)+10);
698         sprintf(s, "<regexp>%s", v.regexp.pattern);
699         return s;
700     }
701     else if(nr==T_IDENTIFIER) {
702         char*s = malloc(strlen(v.id)+10);
703         sprintf(s, "<ID>%s", v.id);
704         return s;
705     }
706     else if(nr==T_INT)     return "<int>";
707     else if(nr==T_UINT)     return "<uint>";
708     else if(nr==T_FLOAT)     return "<float>";
709     else if(nr==T_EOF)        return "***END***";
710     else if(nr==T_GE)         return ">=";
711     else if(nr==T_LE)         return "<=";
712     else if(nr==T_MINUSMINUS) return "--";
713     else if(nr==T_PLUSPLUS)   return "++";
714     else if(nr==KW_IMPLEMENTS) return "implements";
715     else if(nr==KW_INTERFACE)  return "interface";
716     else if(nr==KW_NAMESPACE)  return "namespace";
717     else if(nr==KW_PROTECTED)  return "protected";
718     else if(nr==KW_OVERRIDE)   return "override";
719     else if(nr==KW_INTERNAL)   return "internal";
720     else if(nr==KW_FUNCTION)   return "function";
721     else if(nr==KW_PACKAGE)    return "package";
722     else if(nr==KW_PRIVATE)    return "private";
723     else if(nr==KW_BOOLEAN)    return "Boolean";
724     else if(nr==KW_DYNAMIC)    return "dynamic";
725     else if(nr==KW_EXTENDS)    return "extends";
726     else if(nr==KW_PUBLIC)     return "public";
727     else if(nr==KW_NATIVE)     return "native";
728     else if(nr==KW_STATIC)     return "static";
729     else if(nr==KW_IMPORT)     return "import";
730     else if(nr==KW_NUMBER)     return "number";
731     else if(nr==KW_CLASS)      return "class";
732     else if(nr==KW_CONST)      return "const";
733     else if(nr==KW_FINAL)      return "final";
734     else if(nr==KW_FALSE)      return "False";
735     else if(nr==KW_TRUE)       return "True";
736     else if(nr==KW_UINT)       return "uint";
737     else if(nr==KW_NULL)       return "null";
738     else if(nr==KW_ELSE)       return "else";
739     else if(nr==KW_USE)        return "use";
740     else if(nr==KW_INT)        return "int";
741     else if(nr==KW_NEW)        return "new";
742     else if(nr==KW_GET)        return "get";
743     else if(nr==KW_SET)        return "set";
744     else if(nr==KW_VAR)        return "var";
745     else if(nr==KW_IS)         return "is";
746     else if(nr==KW_AS)         return "as";
747     else {
748         sprintf(mbuf, "%d", nr);
749         return mbuf;
750     }
751 }
752
753 void initialize_scanner()
754 {
755     BEGIN(BEGINNING);
756 }
757
758