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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 %option stack
  22 %option nounput noyy_top_state
  23 %option 8bit never-interactive prefix="parser_"
  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                                 parser_error("Malformed '#...' line-directive; invalid linenumber");
 114                             fname = strchr(cptr, '"');
 115                             if(!fname)
 116                                 parser_error("Malformed '#...' line-directive; missing filename");
 117                             fname++;
 118                             cptr = strchr(fname, '"');
 119                             if(!cptr)
 120                                 parser_error("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                                 parser_lval.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                                 parser_lval.uuid = parse_uuid(yytext);
 138                                 return aUUID;
 139                         }
 140 {hex}                   {
 141                                 parser_lval.num = strtoul(yytext, NULL, 0);
 142                                 return aHEXNUM;
 143                         }
 144 {int}                   {
 145                                 parser_lval.num = strtoul(yytext, NULL, 0);
 146                                 return aNUM;
 147                         }
 148 SAFEARRAY{ws}*/\(       return tSAFEARRAY;
 149 {cident}                return kw_token(yytext);
 150 \n                      line_number++;
 151 {ws}
 152 \<\<                    return SHL;
 153 \>\>                    return SHR;
 154 .                       return yytext[0];
 155 <<EOF>>                 {
 156                                 if (import_stack_ptr) {
 157                                         pop_import();
 158                                         return aEOF;
 159                                 }
 160                                 else yyterminate();
 161                         }
 162 %%
 163
 164 #ifndef parser_wrap
 165 int parser_wrap(void)
 166 {
 167         return 1;
 168 }
 169 #endif
 170
 171 static struct keyword {
 172         const char *kw;
 173         int token;
 174 } keywords[] = {
 175         {"FALSE",                       tFALSE},
 176         {"TRUE",                        tTRUE},
 177         {"__cdecl",                     tCDECL},
 178         {"__int64",                     tINT64},
 179         {"__stdcall",                   tSTDCALL},
 180         {"_stdcall",                    tSTDCALL},
 181         {"aggregatable",                tAGGREGATABLE},
 182         {"allocate",                    tALLOCATE},
 183         {"appobject",                   tAPPOBJECT},
 184         {"async",                       tASYNC},
 185         {"async_uuid",                  tASYNCUUID},
 186         {"auto_handle",                 tAUTOHANDLE},
 187         {"bindable",                    tBINDABLE},
 188         {"boolean",                     tBOOLEAN},
 189         {"broadcast",                   tBROADCAST},
 190         {"byte",                        tBYTE},
 191         {"byte_count",                  tBYTECOUNT},
 192         {"call_as",                     tCALLAS},
 193         {"callback",                    tCALLBACK},
 194         {"case",                        tCASE},
 195         {"char",                        tCHAR},
 196         {"coclass",                     tCOCLASS},
 197         {"code",                        tCODE},
 198         {"comm_status",                 tCOMMSTATUS},
 199         {"const",                       tCONST},
 200         {"context_handle",              tCONTEXTHANDLE},
 201         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 202         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 203         {"control",                     tCONTROL},
 204         {"cpp_quote",                   tCPPQUOTE},
 205 /* ... */
 206         {"default",                     tDEFAULT},
 207         {"defaultcollelem",             tDEFAULTCOLLELEM},
 208         {"defaultvalue",                tDEFAULTVALUE},
 209         {"defaultvtable",               tDEFAULTVTABLE},
 210         {"dispinterface",               tDISPINTERFACE},
 211         {"displaybind",                 tDISPLAYBIND},
 212         {"dllname",                     tDLLNAME},
 213         {"double",                      tDOUBLE},
 214         {"dual",                        tDUAL},
 215         {"endpoint",                    tENDPOINT},
 216         {"entry",                       tENTRY},
 217         {"enum",                        tENUM},
 218         {"error_status_t",              tERRORSTATUST},
 219         {"explicit_handle",             tEXPLICITHANDLE},
 220         {"extern",                      tEXTERN},
 221         {"float",                       tFLOAT},
 222         {"handle",                      tHANDLE},
 223         {"handle_t",                    tHANDLET},
 224         {"helpcontext",                 tHELPCONTEXT},
 225         {"helpfile",                    tHELPFILE},
 226         {"helpstring",                  tHELPSTRING},
 227         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 228         {"helpstringdll",               tHELPSTRINGDLL},
 229         {"hidden",                      tHIDDEN},
 230         {"hyper",                       tHYPER},
 231         {"id",                          tID},
 232         {"idempotent",                  tIDEMPOTENT},
 233 /* ... */
 234         {"iid_is",                      tIIDIS},
 235         {"immediatebind",               tIMMEDIATEBIND},
 236         {"implicit_handle",             tIMPLICITHANDLE},
 237         {"import",                      tIMPORT},
 238         {"importlib",                   tIMPORTLIB},
 239         {"in",                          tIN},
 240         {"in_line",                     tINLINE},
 241         {"input_sync",                  tINPUTSYNC},
 242         {"int",                         tINT},
 243 /* ... */
 244         {"interface",                   tINTERFACE},
 245         {"lcid",                        tLCID},
 246         {"length_is",                   tLENGTHIS},
 247         {"library",                     tLIBRARY},
 248 /* ... */
 249         {"local",                       tLOCAL},
 250         {"long",                        tLONG},
 251 /* ... */
 252         {"methods",                     tMETHODS},
 253 /* ... */
 254         {"module",                      tMODULE},
 255 /* ... */
 256         {"nonbrowsable",                tNONBROWSABLE},
 257         {"noncreatable",                tNONCREATABLE},
 258         {"nonextensible",               tNONEXTENSIBLE},
 259         {"object",                      tOBJECT},
 260         {"odl",                         tODL},
 261         {"oleautomation",               tOLEAUTOMATION},
 262 /* ... */
 263         {"optional",                    tOPTIONAL},
 264         {"out",                         tOUT},
 265 /* ... */
 266         {"pointer_default",             tPOINTERDEFAULT},
 267 /* ... */
 268         {"properties",                  tPROPERTIES},
 269         {"propget",                     tPROPGET},
 270         {"propput",                     tPROPPUT},
 271         {"propputref",                  tPROPPUTREF},
 272         {"ptr",                         tPTR},
 273 /* ... */
 274         {"public",                      tPUBLIC},
 275         {"range",                       tRANGE},
 276 /* ... */
 277         {"readonly",                    tREADONLY},
 278         {"ref",                         tREF},
 279         {"requestedit",                 tREQUESTEDIT},
 280         {"restricted",                  tRESTRICTED},
 281         {"retval",                      tRETVAL},
 282 /* ... */
 283         {"short",                       tSHORT},
 284         {"signed",                      tSIGNED},
 285         {"single",                      tSINGLE},
 286         {"size_is",                     tSIZEIS},
 287         {"sizeof",                      tSIZEOF},
 288         {"small",                       tSMALL},
 289 /* ... */
 290         {"source",                      tSOURCE},
 291 /* ... */
 292         {"string",                      tSTRING},
 293         {"struct",                      tSTRUCT},
 294         {"switch",                      tSWITCH},
 295         {"switch_is",                   tSWITCHIS},
 296         {"switch_type",                 tSWITCHTYPE},
 297 /* ... */
 298         {"transmit_as",                 tTRANSMITAS},
 299         {"typedef",                     tTYPEDEF},
 300         {"union",                       tUNION},
 301 /* ... */
 302         {"unique",                      tUNIQUE},
 303         {"unsigned",                    tUNSIGNED},
 304 /* ... */
 305         {"uuid",                        tUUID},
 306         {"v1_enum",                     tV1ENUM},
 307 /* ... */
 308         {"vararg",                      tVARARG},
 309         {"version",                     tVERSION},
 310         {"void",                        tVOID},
 311         {"wchar_t",                     tWCHAR},
 312         {"wire_marshal",                tWIREMARSHAL},
 313 };
 314 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 315 #define KWP(p) ((const struct keyword *)(p))
 316
 317 static int kw_cmp_func(const void *s1, const void *s2)
 318 {
 319         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 320 }
 321
 322 #define KW_BSEARCH
 323 static int kw_token(const char *kw)
 324 {
 325         struct keyword key, *kwp;
 326         key.kw = kw;
 327 #ifdef KW_BSEARCH
 328         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 329 #else
 330         {
 331                 int i;
 332                 for (kwp=NULL, i=0; i < NKEYWORDS; i++)
 333                         if (!kw_cmp_func(&key, &keywords[i])) {
 334                                 kwp = &keywords[i];
 335                                 break;
 336                         }
 337         }
 338 #endif
 339         if (kwp) {
 340                 parser_lval.str = xstrdup(kwp->kw);
 341                 return kwp->token;
 342         }
 343         parser_lval.str = xstrdup(kw);
 344         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 345 }
 346
 347 static void addcchar(char c)
 348 {
 349         if(cbufidx >= cbufalloc)
 350         {
 351                 cbufalloc += 1024;
 352                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 353                 if(cbufalloc > 65536)
 354                         parser_warning("Reallocating string buffer larger than 64kB");
 355         }
 356         cbuffer[cbufidx++] = c;
 357 }
 358
 359 static char *get_buffered_cstring(void)
 360 {
 361         addcchar(0);
 362         return xstrdup(cbuffer);
 363 }
 364
 365 static void pop_import(void)
 366 {
 367         int ptr = import_stack_ptr-1;
 368
 369         fclose(yyin);
 370         yy_delete_buffer( YY_CURRENT_BUFFER );
 371         yy_switch_to_buffer( import_stack[ptr].state );
 372         if (temp_name) {
 373                 unlink(temp_name);
 374                 free(temp_name);
 375         }
 376         temp_name = import_stack[ptr].temp_name;
 377         free( input_name );
 378         input_name = import_stack[ptr].input_name;
 379         line_number = import_stack[ptr].line_number;
 380         import_stack_ptr--;
 381 }
 382
 383 struct imports {
 384         char *name;
 385         struct imports *next;
 386 } *first_import;
 387
 388 int do_import(char *fname)
 389 {
 390         FILE *f;
 391         char *hname, *path, *p;
 392         struct imports *import;
 393         int ptr = import_stack_ptr;
 394         int ret;
 395
 396         if (!parse_only && do_header) {
 397                 hname = dup_basename(fname, ".idl");
 398                 p = hname + strlen(hname) - 2;
 399                 if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
 400
 401                 fprintf(header, "#include <%s>\n", hname);
 402                 free(hname);
 403         }
 404
 405         import = first_import;
 406         while (import && strcmp(import->name, fname))
 407                 import = import->next;
 408         if (import) return 0; /* already imported */
 409
 410         import = xmalloc(sizeof(struct imports));
 411         import->name = xstrdup(fname);
 412         import->next = first_import;
 413         first_import = import;
 414
 415         if (!(path = wpp_find_include( fname, input_name )))
 416             parser_error("Unable to open include file %s", fname);
 417
 418         import_stack[ptr].temp_name = temp_name;
 419         import_stack[ptr].input_name = input_name;
 420         import_stack[ptr].line_number = line_number;
 421         import_stack_ptr++;
 422         input_name = path;
 423         line_number = 1;
 424
 425         ret = wpp_parse_temp( path, NULL, &temp_name );
 426         if (ret) exit(1);
 427
 428         if((f = fopen(temp_name, "r")) == NULL)
 429                 parser_error("Unable to open %s", temp_name);
 430
 431         import_stack[ptr].state = YY_CURRENT_BUFFER;
 432         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 433         return 1;
 434 }
 435
 436 void abort_import(void)
 437 {
 438         int ptr;
 439
 440         for (ptr=0; ptr<import_stack_ptr; ptr++)
 441                 unlink(import_stack[ptr].temp_name);
 442 }