tools/widl/parser.l

   1 /* -*-C-*-
   2  * IDL Compiler
   3  *
   4  * Copyright 2002 Ove Kaaven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 %option stack
  22 %option nounput noyy_top_state
  23 %option 8bit never-interactive
  24
  25 nl      \r?\n
  26 ws      [ \f\t\r]
  27 cident  [a-zA-Z_][0-9a-zA-Z_]*
  28 int     [0-9]+
  29 hexd    [0-9a-fA-F]
  30 hex     0x{hexd}+
  31 uuid    {hexd}{8}-{hexd}{4}-{hexd}{4}-{hexd}{4}-{hexd}{12}
  32
  33 %x QUOTE
  34 %x pp_line
  35
  36 %{
  37
  38 #include "config.h"
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <ctype.h>
  44 #include <assert.h>
  45 #ifdef HAVE_UNISTD_H
  46 # include <unistd.h>
  47 #endif
  48
  49 #include "widl.h"
  50 #include "utils.h"
  51 #include "parser.h"
  52 #include "wine/wpp.h"
  53
  54 #include "parser.tab.h"
  55
  56 extern char *temp_name;
  57
  58 static void addcchar(char c);
  59 static char *get_buffered_cstring(void);
  60
  61 static char *cbuffer;
  62 static int cbufidx;
  63 static int cbufalloc = 0;
  64
  65 static int kw_token(const char *kw);
  66
  67 #define MAX_IMPORT_DEPTH 10
  68 struct {
  69   YY_BUFFER_STATE state;
  70   char *input_name;
  71   int   line_number;
  72   char *temp_name;
  73 } import_stack[MAX_IMPORT_DEPTH];
  74 int import_stack_ptr = 0;
  75
  76 static void pop_import(void);
  77
  78 static UUID* parse_uuid(const char*u)
  79 {
  80   UUID* uuid = xmalloc(sizeof(UUID));
  81   char b[3];
  82   /* it would be nice to use UuidFromStringA */
  83   uuid->Data1 = strtoul(u, NULL, 16);
  84   uuid->Data2 = strtoul(u+9, NULL, 16);
  85   uuid->Data3 = strtoul(u+14, NULL, 16);
  86   b[2] = 0;
  87   memcpy(b, u+19, 2); uuid->Data4[0] = strtoul(b, NULL, 16);
  88   memcpy(b, u+21, 2); uuid->Data4[1] = strtoul(b, NULL, 16);
  89   memcpy(b, u+24, 2); uuid->Data4[2] = strtoul(b, NULL, 16);
  90   memcpy(b, u+26, 2); uuid->Data4[3] = strtoul(b, NULL, 16);
  91   memcpy(b, u+28, 2); uuid->Data4[4] = strtoul(b, NULL, 16);
  92   memcpy(b, u+30, 2); uuid->Data4[5] = strtoul(b, NULL, 16);
  93   memcpy(b, u+32, 2); uuid->Data4[6] = strtoul(b, NULL, 16);
  94   memcpy(b, u+34, 2); uuid->Data4[7] = strtoul(b, NULL, 16);
  95   return uuid;
  96 }
  97
  98 %}
  99
 100 /*
 101  **************************************************************************
 102  * The flexer starts here
 103  **************************************************************************
 104  */
 105 %%
 106 <INITIAL>^{ws}*\#{ws}*  yy_push_state(pp_line);
 107 <pp_line>[^\n]*         {
 108                             int lineno;
 109                             char *cptr, *fname;
 110                             yy_pop_state();
 111                             lineno = (int)strtol(yytext, &cptr, 10);
 112                             if(!lineno)
 113                                 yyerror("Malformed '#...' line-directive; invalid linenumber");
 114                             fname = strchr(cptr, '"');
 115                             if(!fname)
 116                                 yyerror("Malformed '#...' line-directive; missing filename");
 117                             fname++;
 118                             cptr = strchr(fname, '"');
 119                             if(!cptr)
 120                                 yyerror("Malformed '#...' line-directive; missing terminating \"");
 121                             *cptr = '\0';
 122                             line_number = lineno - 1;  /* We didn't read the newline */
 123                             free( input_name );
 124                             input_name = xstrdup(fname);
 125                         }
 126 \"                      yy_push_state(QUOTE); cbufidx = 0;
 127 <QUOTE>\"               {
 128                                 yy_pop_state();
 129                                 yylval.str = get_buffered_cstring();
 130                                 return aSTRING;
 131                         }
 132 <QUOTE>\\\\             |
 133 <QUOTE>\\\"             addcchar(yytext[1]);
 134 <QUOTE>\\.              addcchar('\\'); addcchar(yytext[1]);
 135 <QUOTE>.                addcchar(yytext[0]);
 136 {uuid}                  {
 137                                 yylval.uuid = parse_uuid(yytext);
 138                                 return aUUID;
 139                         }
 140 {hex}                   {
 141                                 yylval.num = strtoul(yytext, NULL, 0);
 142                                 return aHEXNUM;
 143                         }
 144 {int}                   {
 145                                 yylval.num = strtoul(yytext, NULL, 0);
 146                                 return aNUM;
 147                         }
 148 {cident}                return kw_token(yytext);
 149 \n                      line_number++;
 150 {ws}
 151 \<\<                    return SHL;
 152 \>\>                    return SHR;
 153 .                       return yytext[0];
 154 <<EOF>>                 {
 155                                 if (import_stack_ptr) {
 156                                         pop_import();
 157                                         return aEOF;
 158                                 }
 159                                 else yyterminate();
 160                         }
 161 %%
 162
 163 #ifndef yywrap
 164 int yywrap(void)
 165 {
 166         return 1;
 167 }
 168 #endif
 169
 170 static struct keyword {
 171         const char *kw;
 172         int token;
 173         int val;
 174 } keywords[] = {
 175         {"__cdecl",                     tCDECL},
 176         {"__int64",                     tINT64},
 177         {"__stdcall",                   tSTDCALL},
 178         {"_stdcall",                    tSTDCALL},
 179         {"aggregatable",                tAGGREGATABLE},
 180         {"allocate",                    tALLOCATE},
 181         {"appobject",                   tAPPOBJECT},
 182         {"arrays",                      tARRAYS},
 183         {"async",                       tASYNC},
 184         {"async_uuid",                  tASYNCUUID},
 185         {"auto_handle",                 tAUTOHANDLE},
 186         {"bindable",                    tBINDABLE},
 187         {"boolean",                     tBOOLEAN},
 188         {"broadcast",                   tBROADCAST},
 189         {"byte",                        tBYTE},
 190         {"byte_count",                  tBYTECOUNT},
 191         {"call_as",                     tCALLAS},
 192         {"callback",                    tCALLBACK},
 193         {"case",                        tCASE},
 194         {"char",                        tCHAR},
 195         {"coclass",                     tCOCLASS},
 196         {"code",                        tCODE},
 197         {"comm_status",                 tCOMMSTATUS},
 198         {"const",                       tCONST},
 199         {"context_handle",              tCONTEXTHANDLE},
 200         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 201         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 202         {"control",                     tCONTROL},
 203         {"cpp_quote",                   tCPPQUOTE},
 204 /* ... */
 205         {"default",                     tDEFAULT},
 206         {"defaultvalue",                tDEFAULTVALUE},
 207 /* ... */
 208         {"dispinterface",               tDISPINTERFACE},
 209 /* ... */
 210         {"displaybind",                 tDISPLAYBIND},
 211         {"dllname",                     tDLLNAME},
 212         {"double",                      tDOUBLE},
 213         {"dual",                        tDUAL},
 214 /* ... */
 215         {"endpoint",                    tENDPOINT},
 216         {"entry",                       tENTRY},
 217         {"enum",                        tENUM},
 218         {"error_status_t",              tERRORSTATUST},
 219         {"explicit_handle",             tEXPLICITHANDLE},
 220         {"extern",                      tEXTERN},
 221 /* ... */
 222         {"float",                       tFLOAT},
 223 /* ... */
 224         {"handle",                      tHANDLE},
 225         {"handle_t",                    tHANDLET},
 226 /* ... */
 227         {"helpcontext",                 tHELPCONTEXT},
 228         {"helpfile",                    tHELPFILE},
 229         {"helpstring",                  tHELPSTRING},
 230         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 231         {"helpstringdll",               tHELPSTRINGDLL},
 232 /* ... */
 233         {"hidden",                      tHIDDEN},
 234         {"hyper",                       tHYPER},
 235         {"id",                          tID},
 236         {"idempotent",                  tIDEMPOTENT},
 237 /* ... */
 238         {"iid_is",                      tIIDIS},
 239 /* ... */
 240         {"implicit_handle",             tIMPLICITHANDLE},
 241         {"import",                      tIMPORT},
 242         {"importlib",                   tIMPORTLIB},
 243         {"in",                          tIN},
 244         {"include",                     tINCLUDE},
 245         {"in_line",                     tINLINE},
 246         {"input_sync",                  tINPUTSYNC},
 247         {"int",                         tINT},
 248 /* ... */
 249         {"interface",                   tINTERFACE},
 250 /* ... */
 251         {"length_is",                   tLENGTHIS},
 252         {"library",                     tLIBRARY},
 253 /* ... */
 254         {"local",                       tLOCAL},
 255         {"long",                        tLONG},
 256 /* ... */
 257         {"methods",                     tMETHODS},
 258 /* ... */
 259         {"module",                      tMODULE},
 260 /* ... */
 261         {"noncreatable",                tNONCREATABLE},
 262         {"object",                      tOBJECT},
 263         {"odl",                         tODL},
 264         {"oleautomation",               tOLEAUTOMATION},
 265 /* ... */
 266         {"optional",                    tOPTIONAL},
 267         {"out",                         tOUT},
 268 /* ... */
 269         {"pointer_default",             tPOINTERDEFAULT},
 270 /* ... */
 271         {"properties",                  tPROPERTIES},
 272         {"propget",                     tPROPGET},
 273         {"propput",                     tPROPPUT},
 274         {"propputref",                  tPROPPUTREF},
 275         {"ptr",                         tPTR},
 276 /* ... */
 277         {"public",                      tPUBLIC},
 278         {"range",                       tRANGE},
 279 /* ... */
 280         {"readonly",                    tREADONLY},
 281         {"ref",                         tREF},
 282 /* ... */
 283         {"restricted",                  tRESTRICTED},
 284         {"retval",                      tRETVAL},
 285 /* ... */
 286         {"short",                       tSHORT},
 287         {"signed",                      tSIGNED},
 288         {"single",                      tSINGLE},
 289         {"size_is",                     tSIZEIS},
 290         {"sizeof",                      tSIZEOF},
 291         {"small",                       tSMALL},
 292 /* ... */
 293         {"source",                      tSOURCE},
 294 /* ... */
 295         {"string",                      tSTRING},
 296         {"struct",                      tSTRUCT},
 297         {"switch",                      tSWITCH},
 298         {"switch_is",                   tSWITCHIS},
 299         {"switch_type",                 tSWITCHTYPE},
 300 /* ... */
 301         {"transmit_as",                 tTRANSMITAS},
 302         {"typedef",                     tTYPEDEF},
 303         {"union",                       tUNION},
 304 /* ... */
 305         {"unique",                      tUNIQUE},
 306         {"unsigned",                    tUNSIGNED},
 307 /* ... */
 308         {"uuid",                        tUUID},
 309         {"v1_enum",                     tV1ENUM},
 310 /* ... */
 311         {"vararg",                      tVARARG},
 312         {"version",                     tVERSION},
 313         {"void",                        tVOID},
 314         {"wchar_t",                     tWCHAR},
 315         {"wire_marshal",                tWIREMARSHAL}
 316 };
 317 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 318 #define KWP(p) ((const struct keyword *)(p))
 319
 320 static int kw_cmp_func(const void *s1, const void *s2)
 321 {
 322         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 323 }
 324
 325 #define KW_BSEARCH
 326 static int kw_token(const char *kw)
 327 {
 328         struct keyword key, *kwp;
 329         key.kw = kw;
 330 #ifdef KW_BSEARCH
 331         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 332 #else
 333         {
 334                 int i;
 335                 for (kwp=NULL, i=0; i < NKEYWORDS; i++)
 336                         if (!kw_cmp_func(&key, &keywords[i])) {
 337                                 kwp = &keywords[i];
 338                                 break;
 339                         }
 340         }
 341 #endif
 342         if (kwp) {
 343                 yylval.str = (char*)kwp->kw;
 344                 return kwp->token;
 345         }
 346         yylval.str = xstrdup(kw);
 347         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 348 }
 349
 350 static void addcchar(char c)
 351 {
 352         if(cbufidx >= cbufalloc)
 353         {
 354                 cbufalloc += 1024;
 355                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 356                 if(cbufalloc > 65536)
 357                         yywarning("Reallocating string buffer larger than 64kB");
 358         }
 359         cbuffer[cbufidx++] = c;
 360 }
 361
 362 static char *get_buffered_cstring(void)
 363 {
 364         addcchar(0);
 365         return xstrdup(cbuffer);
 366 }
 367
 368 static void pop_import(void)
 369 {
 370         int ptr = import_stack_ptr-1;
 371
 372         fclose(yyin);
 373         yy_delete_buffer( YY_CURRENT_BUFFER );
 374         yy_switch_to_buffer( import_stack[ptr].state );
 375         if (temp_name) {
 376                 unlink(temp_name);
 377                 free(temp_name);
 378         }
 379         temp_name = import_stack[ptr].temp_name;
 380         free( input_name );
 381         input_name = import_stack[ptr].input_name;
 382         line_number = import_stack[ptr].line_number;
 383         import_stack_ptr--;
 384 }
 385
 386 struct imports {
 387         char *name;
 388         struct imports *next;
 389 } *first_import;
 390
 391 int do_import(char *fname)
 392 {
 393         FILE *f;
 394         char *hname, *path, *p;
 395         struct imports *import;
 396         int ptr = import_stack_ptr;
 397         int ret;
 398
 399         if (!parse_only && do_header) {
 400                 hname = dup_basename(fname, ".idl");
 401                 p = hname + strlen(hname) - 2;
 402                 if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
 403
 404                 fprintf(header, "#include <%s>\n", hname);
 405                 free(hname);
 406         }
 407
 408         import = first_import;
 409         while (import && strcmp(import->name, fname))
 410                 import = import->next;
 411         if (import) return 0; /* already imported */
 412
 413         import = xmalloc(sizeof(struct imports));
 414         import->name = xstrdup(fname);
 415         import->next = first_import;
 416         first_import = import;
 417
 418         if (!(path = wpp_find_include( fname, input_name )))
 419             yyerror("Unable to open include file %s", fname);
 420
 421         import_stack[ptr].temp_name = temp_name;
 422         import_stack[ptr].input_name = input_name;
 423         import_stack[ptr].line_number = line_number;
 424         import_stack_ptr++;
 425         input_name = path;
 426         line_number = 1;
 427
 428         ret = wpp_parse_temp( path, NULL, &temp_name );
 429         if (ret) exit(1);
 430
 431         if((f = fopen(temp_name, "r")) == NULL)
 432                 yyerror("Unable to open %s", temp_name);
 433
 434         import_stack[ptr].state = YY_CURRENT_BUFFER;
 435         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 436         return 1;
 437 }
 438
 439 void abort_import(void)
 440 {
 441         int ptr;
 442
 443         for (ptr=0; ptr<import_stack_ptr; ptr++)
 444                 unlink(import_stack[ptr].temp_name);
 445 }