sdk/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 noinput 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 u_suffix        (u|U)
  29 l_suffix        (l|L)
  30 int     [0-9]+({l_suffix}?{u_suffix}?|{u_suffix}?{l_suffix}?)?
  31 hexd    [0-9a-fA-F]
  32 hex     0(x|X){hexd}+({l_suffix}?{u_suffix}?|{u_suffix}?{l_suffix}?)?
  33 uuid    {hexd}{8}-{hexd}{4}-{hexd}{4}-{hexd}{4}-{hexd}{12}
  34 double  [0-9]+\.[0-9]+([eE][+-]?[0-9]+)*
  35
  36 %x QUOTE
  37 %x WSTRQUOTE
  38 %x ATTR
  39 %x PP_LINE
  40 %x PP_PRAGMA
  41 %x SQUOTE
  42
  43 %{
  44
  45 #include "config.h"
  46 #include "wine/port.h"
  47
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <ctype.h>
  52 #include <assert.h>
  53 #include <errno.h>
  54 #include <limits.h>
  55
  56 #ifdef HAVE_UNISTD_H
  57 #include <unistd.h>
  58 #else
  59 #define YY_NO_UNISTD_H
  60 #endif
  61
  62 #include "widl.h"
  63 #include "utils.h"
  64 #include "parser.h"
  65 #include "wine/wpp.h"
  66
  67 #include "parser.tab.h"
  68
  69 static void addcchar(char c);
  70 static char *get_buffered_cstring(void);
  71
  72 static char *cbuffer;
  73 static int cbufidx;
  74 static int cbufalloc = 0;
  75
  76 static int kw_token(const char *kw);
  77 static int attr_token(const char *kw);
  78
  79 static void switch_to_acf(void);
  80
  81 static warning_list_t *disabled_warnings = NULL;
  82
  83 #define MAX_IMPORT_DEPTH 20
  84 struct {
  85   YY_BUFFER_STATE state;
  86   char *input_name;
  87   int   line_number;
  88   char *temp_name;
  89 } import_stack[MAX_IMPORT_DEPTH];
  90 int import_stack_ptr = 0;
  91
  92 /* converts an integer in string form to an unsigned long and prints an error
  93  * on overflow */
  94 static unsigned int xstrtoul(const char *nptr, char **endptr, int base)
  95 {
  96     unsigned long val;
  97
  98     errno = 0;
  99     val = strtoul(nptr, endptr, base);
 100     if ((val == ULONG_MAX && errno == ERANGE) || ((unsigned int)val != val))
 101         error_loc("integer constant %s is too large\n", nptr);
 102     return val;
 103 }
 104
 105 UUID *parse_uuid(const char *u)
 106 {
 107   UUID* uuid = xmalloc(sizeof(UUID));
 108   char b[3];
 109   /* it would be nice to use UuidFromStringA */
 110   uuid->Data1 = strtoul(u, NULL, 16);
 111   uuid->Data2 = strtoul(u+9, NULL, 16);
 112   uuid->Data3 = strtoul(u+14, NULL, 16);
 113   b[2] = 0;
 114   memcpy(b, u+19, 2); uuid->Data4[0] = strtoul(b, NULL, 16);
 115   memcpy(b, u+21, 2); uuid->Data4[1] = strtoul(b, NULL, 16);
 116   memcpy(b, u+24, 2); uuid->Data4[2] = strtoul(b, NULL, 16);
 117   memcpy(b, u+26, 2); uuid->Data4[3] = strtoul(b, NULL, 16);
 118   memcpy(b, u+28, 2); uuid->Data4[4] = strtoul(b, NULL, 16);
 119   memcpy(b, u+30, 2); uuid->Data4[5] = strtoul(b, NULL, 16);
 120   memcpy(b, u+32, 2); uuid->Data4[6] = strtoul(b, NULL, 16);
 121   memcpy(b, u+34, 2); uuid->Data4[7] = strtoul(b, NULL, 16);
 122   return uuid;
 123 }
 124
 125 %}
 126
 127 /*
 128  **************************************************************************
 129  * The flexer starts here
 130  **************************************************************************
 131  */
 132 %%
 133 <INITIAL>^{ws}*\#{ws}*pragma{ws}+ yy_push_state(PP_PRAGMA);
 134 <INITIAL,ATTR>^{ws}*\#{ws}*     yy_push_state(PP_LINE);
 135 <PP_LINE>[^\n]*         {
 136                             int lineno;
 137                             char *cptr, *fname;
 138                             yy_pop_state();
 139                             lineno = (int)strtol(yytext, &cptr, 10);
 140                             if(!lineno)
 141                                 error_loc("Malformed '#...' line-directive; invalid linenumber\n");
 142                             fname = strchr(cptr, '"');
 143                             if(!fname)
 144                                 error_loc("Malformed '#...' line-directive; missing filename\n");
 145                             fname++;
 146                             cptr = strchr(fname, '"');
 147                             if(!cptr)
 148                                 error_loc("Malformed '#...' line-directive; missing terminating \"\n");
 149                             *cptr = '\0';
 150                             line_number = lineno - 1;  /* We didn't read the newline */
 151                             input_name = xstrdup(fname);
 152                         }
 153 <PP_PRAGMA>midl_echo[^\n]*  yyless(9); yy_pop_state(); return tCPPQUOTE;
 154 <PP_PRAGMA>winrt[^\n]*  {
 155                             if(import_stack_ptr) {
 156                                 if(!winrt_mode)
 157                                     error_loc("winrt IDL file imported in non-winrt mode\n");
 158                             }else {
 159                                 const char *ptr = yytext+5;
 160
 161                                 winrt_mode = TRUE;
 162
 163                                 while(isspace(*ptr))
 164                                     ptr++;
 165                                 if(!strncmp(ptr, "ns_prefix", 9) && (!*(ptr += 9) || isspace(*ptr)))
 166                                     use_abi_namespace = TRUE;
 167                             }
 168                             yy_pop_state();
 169                         }
 170 <PP_PRAGMA>[^\n]*       parser_lval.str = xstrdup(yytext); yy_pop_state(); return aPRAGMA;
 171 <INITIAL>^{ws}*midl_pragma{ws}+warning return tPRAGMA_WARNING;
 172 <INITIAL,ATTR>\"        yy_push_state(QUOTE); cbufidx = 0;
 173 <QUOTE>\"               {
 174                                 yy_pop_state();
 175                                 parser_lval.str = get_buffered_cstring();
 176                                 return aSTRING;
 177                         }
 178 <INITIAL,ATTR>L\"       yy_push_state(WSTRQUOTE); cbufidx = 0;
 179 <WSTRQUOTE>\"           {
 180                                 yy_pop_state();
 181                                 parser_lval.str = get_buffered_cstring();
 182                                 return aWSTRING;
 183                         }
 184 <INITIAL,ATTR>\'        yy_push_state(SQUOTE); cbufidx = 0;
 185 <SQUOTE>\'              {
 186                                 yy_pop_state();
 187                                 parser_lval.str = get_buffered_cstring();
 188                                 return aSQSTRING;
 189                         }
 190 <QUOTE,WSTRQUOTE,SQUOTE>\\\\    |
 191 <QUOTE,WSTRQUOTE>\\\"   addcchar(yytext[1]);
 192 <SQUOTE>\\\'    addcchar(yytext[1]);
 193 <QUOTE,WSTRQUOTE,SQUOTE>\\.     addcchar('\\'); addcchar(yytext[1]);
 194 <QUOTE,WSTRQUOTE,SQUOTE>.       addcchar(yytext[0]);
 195 <INITIAL,ATTR>\[        yy_push_state(ATTR); return '[';
 196 <ATTR>\]                yy_pop_state(); return ']';
 197 <ATTR>{cident}          return attr_token(yytext);
 198 <ATTR>{uuid}                    {
 199                                 parser_lval.uuid = parse_uuid(yytext);
 200                                 return aUUID;
 201                         }
 202 <INITIAL,ATTR>{hex}     {
 203                                 parser_lval.num = xstrtoul(yytext, NULL, 0);
 204                                 return aHEXNUM;
 205                         }
 206 <INITIAL,ATTR>{int}     {
 207                                 parser_lval.num = xstrtoul(yytext, NULL, 0);
 208                                 return aNUM;
 209                         }
 210 <INITIAL>{double}       {
 211                                 parser_lval.dbl = strtod(yytext, NULL);
 212                                 return aDOUBLE;
 213                         }
 214 SAFEARRAY{ws}*/\(       return tSAFEARRAY;
 215 {cident}                return kw_token(yytext);
 216 <INITIAL,ATTR>\n        line_number++;
 217 <INITIAL,ATTR>{ws}
 218 <INITIAL,ATTR>\<\<      return SHL;
 219 <INITIAL,ATTR>\>\>      return SHR;
 220 <INITIAL,ATTR>\-\>      return MEMBERPTR;
 221 <INITIAL,ATTR>==        return EQUALITY;
 222 <INITIAL,ATTR>!=        return INEQUALITY;
 223 <INITIAL,ATTR>\>=       return GREATEREQUAL;
 224 <INITIAL,ATTR>\<=       return LESSEQUAL;
 225 <INITIAL,ATTR>\|\|      return LOGICALOR;
 226 <INITIAL,ATTR>&&        return LOGICALAND;
 227 <INITIAL,ATTR>\.\.\.    return ELLIPSIS;
 228 <INITIAL,ATTR>.         return yytext[0];
 229 <<EOF>>                 {
 230                             if (import_stack_ptr)
 231                                 return aEOF;
 232                             if (acf_name)
 233                             {
 234                                 switch_to_acf();
 235                                 return aACF;
 236                             }
 237                             yyterminate();
 238                         }
 239 %%
 240
 241 #ifndef parser_wrap
 242 int parser_wrap(void)
 243 {
 244         return 1;
 245 }
 246 #endif
 247
 248 struct keyword {
 249         const char *kw;
 250         int token;
 251 };
 252
 253 /* This table MUST be alphabetically sorted on the kw field */
 254 static const struct keyword keywords[] = {
 255         {"FALSE",                       tFALSE},
 256         {"NULL",                        tNULL},
 257         {"TRUE",                        tTRUE},
 258         {"__cdecl",                     tCDECL},
 259         {"__fastcall",                  tFASTCALL},
 260         {"__int32",                     tINT32},
 261         {"__int3264",                   tINT3264},
 262         {"__int64",                     tINT64},
 263         {"__pascal",                    tPASCAL},
 264         {"__stdcall",                   tSTDCALL},
 265         {"_cdecl",                      tCDECL},
 266         {"_fastcall",                   tFASTCALL},
 267         {"_pascal",                     tPASCAL},
 268         {"_stdcall",                    tSTDCALL},
 269         {"boolean",                     tBOOLEAN},
 270         {"byte",                        tBYTE},
 271         {"case",                        tCASE},
 272         {"cdecl",                       tCDECL},
 273         {"char",                        tCHAR},
 274         {"coclass",                     tCOCLASS},
 275         {"const",                       tCONST},
 276         {"cpp_quote",                   tCPPQUOTE},
 277         {"default",                     tDEFAULT},
 278         {"dispinterface",               tDISPINTERFACE},
 279         {"double",                      tDOUBLE},
 280         {"enum",                        tENUM},
 281         {"error_status_t",              tERRORSTATUST},
 282         {"extern",                      tEXTERN},
 283         {"float",                       tFLOAT},
 284         {"handle_t",                    tHANDLET},
 285         {"hyper",                       tHYPER},
 286         {"import",                      tIMPORT},
 287         {"importlib",                   tIMPORTLIB},
 288         {"inline",                      tINLINE},
 289         {"int",                         tINT},
 290         {"interface",                   tINTERFACE},
 291         {"library",                     tLIBRARY},
 292         {"long",                        tLONG},
 293         {"methods",                     tMETHODS},
 294         {"module",                      tMODULE},
 295         {"namespace",                   tNAMESPACE},
 296         {"pascal",                      tPASCAL},
 297         {"properties",                  tPROPERTIES},
 298         {"register",                    tREGISTER},
 299         {"short",                       tSHORT},
 300         {"signed",                      tSIGNED},
 301         {"sizeof",                      tSIZEOF},
 302         {"small",                       tSMALL},
 303         {"static",                      tSTATIC},
 304         {"stdcall",                     tSTDCALL},
 305         {"struct",                      tSTRUCT},
 306         {"switch",                      tSWITCH},
 307         {"typedef",                     tTYPEDEF},
 308         {"union",                       tUNION},
 309         {"unsigned",                    tUNSIGNED},
 310         {"void",                        tVOID},
 311         {"wchar_t",                     tWCHAR},
 312 };
 313 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 314
 315 /* keywords only recognized in attribute lists
 316  * This table MUST be alphabetically sorted on the kw field
 317  */
 318 static const struct keyword attr_keywords[] =
 319 {
 320         {"aggregatable",                tAGGREGATABLE},
 321         {"allocate",                    tALLOCATE},
 322         {"annotation",                  tANNOTATION},
 323         {"apartment",                   tAPARTMENT},
 324         {"appobject",                   tAPPOBJECT},
 325         {"async",                       tASYNC},
 326         {"async_uuid",                  tASYNCUUID},
 327         {"auto_handle",                 tAUTOHANDLE},
 328         {"bindable",                    tBINDABLE},
 329         {"both",                        tBOTH},
 330         {"broadcast",                   tBROADCAST},
 331         {"byte_count",                  tBYTECOUNT},
 332         {"call_as",                     tCALLAS},
 333         {"callback",                    tCALLBACK},
 334         {"code",                        tCODE},
 335         {"comm_status",                 tCOMMSTATUS},
 336         {"context_handle",              tCONTEXTHANDLE},
 337         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 338         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 339         {"control",                     tCONTROL},
 340         {"decode",                      tDECODE},
 341         {"defaultbind",                 tDEFAULTBIND},
 342         {"defaultcollelem",             tDEFAULTCOLLELEM},
 343         {"defaultvalue",                tDEFAULTVALUE},
 344         {"defaultvtable",               tDEFAULTVTABLE},
 345         {"disable_consistency_check",   tDISABLECONSISTENCYCHECK},
 346         {"displaybind",                 tDISPLAYBIND},
 347         {"dllname",                     tDLLNAME},
 348         {"dual",                        tDUAL},
 349         {"enable_allocate",             tENABLEALLOCATE},
 350         {"encode",                      tENCODE},
 351         {"endpoint",                    tENDPOINT},
 352         {"entry",                       tENTRY},
 353         {"explicit_handle",             tEXPLICITHANDLE},
 354         {"fault_status",                tFAULTSTATUS},
 355         {"force_allocate",              tFORCEALLOCATE},
 356         {"free",                        tFREE},
 357         {"handle",                      tHANDLE},
 358         {"helpcontext",                 tHELPCONTEXT},
 359         {"helpfile",                    tHELPFILE},
 360         {"helpstring",                  tHELPSTRING},
 361         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 362         {"helpstringdll",               tHELPSTRINGDLL},
 363         {"hidden",                      tHIDDEN},
 364         {"id",                          tID},
 365         {"idempotent",                  tIDEMPOTENT},
 366         {"ignore",                      tIGNORE},
 367         {"iid_is",                      tIIDIS},
 368         {"immediatebind",               tIMMEDIATEBIND},
 369         {"implicit_handle",             tIMPLICITHANDLE},
 370         {"in",                          tIN},
 371         {"in_line",                     tIN_LINE},
 372         {"input_sync",                  tINPUTSYNC},
 373         {"lcid",                        tLCID},
 374         {"length_is",                   tLENGTHIS},
 375         {"licensed",                    tLICENSED},
 376         {"local",                       tLOCAL},
 377         {"maybe",                       tMAYBE},
 378         {"message",                     tMESSAGE},
 379         {"neutral",                     tNEUTRAL},
 380         {"nocode",                      tNOCODE},
 381         {"nonbrowsable",                tNONBROWSABLE},
 382         {"noncreatable",                tNONCREATABLE},
 383         {"nonextensible",               tNONEXTENSIBLE},
 384         {"notify",                      tNOTIFY},
 385         {"notify_flag",                 tNOTIFYFLAG},
 386         {"object",                      tOBJECT},
 387         {"odl",                         tODL},
 388         {"oleautomation",               tOLEAUTOMATION},
 389         {"optimize",                    tOPTIMIZE},
 390         {"optional",                    tOPTIONAL},
 391         {"out",                         tOUT},
 392         {"partial_ignore",              tPARTIALIGNORE},
 393         {"pointer_default",             tPOINTERDEFAULT},
 394         {"progid",                      tPROGID},
 395         {"propget",                     tPROPGET},
 396         {"propput",                     tPROPPUT},
 397         {"propputref",                  tPROPPUTREF},
 398         {"proxy",                       tPROXY},
 399         {"ptr",                         tPTR},
 400         {"public",                      tPUBLIC},
 401         {"range",                       tRANGE},
 402         {"readonly",                    tREADONLY},
 403         {"ref",                         tREF},
 404         {"represent_as",                tREPRESENTAS},
 405         {"requestedit",                 tREQUESTEDIT},
 406         {"restricted",                  tRESTRICTED},
 407         {"retval",                      tRETVAL},
 408         {"single",                      tSINGLE},
 409         {"size_is",                     tSIZEIS},
 410         {"source",                      tSOURCE},
 411         {"strict_context_handle",       tSTRICTCONTEXTHANDLE},
 412         {"string",                      tSTRING},
 413         {"switch_is",                   tSWITCHIS},
 414         {"switch_type",                 tSWITCHTYPE},
 415         {"threading",                   tTHREADING},
 416         {"transmit_as",                 tTRANSMITAS},
 417         {"uidefault",                   tUIDEFAULT},
 418         {"unique",                      tUNIQUE},
 419         {"user_marshal",                tUSERMARSHAL},
 420         {"usesgetlasterror",            tUSESGETLASTERROR},
 421         {"uuid",                        tUUID},
 422         {"v1_enum",                     tV1ENUM},
 423         {"vararg",                      tVARARG},
 424         {"version",                     tVERSION},
 425         {"vi_progid",                   tVIPROGID},
 426         {"wire_marshal",                tWIREMARSHAL},
 427 };
 428
 429 /* attributes TODO:
 430     custom
 431     first_is
 432     last_is
 433     max_is
 434     min_is
 435 */
 436
 437 #define KWP(p) ((const struct keyword *)(p))
 438
 439 static int kw_cmp_func(const void *s1, const void *s2)
 440 {
 441         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 442 }
 443
 444 static int kw_token(const char *kw)
 445 {
 446         struct keyword key, *kwp;
 447         key.kw = kw;
 448         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 449         if (kwp && (winrt_mode || kwp->token != tNAMESPACE)) {
 450                 parser_lval.str = xstrdup(kwp->kw);
 451                 return kwp->token;
 452         }
 453         parser_lval.str = xstrdup(kw);
 454         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 455 }
 456
 457 static int attr_token(const char *kw)
 458 {
 459         struct keyword key, *kwp;
 460         key.kw = kw;
 461         kwp = bsearch(&key, attr_keywords, sizeof(attr_keywords)/sizeof(attr_keywords[0]),
 462                       sizeof(attr_keywords[0]), kw_cmp_func);
 463         if (kwp) {
 464             parser_lval.str = xstrdup(kwp->kw);
 465             return kwp->token;
 466         }
 467         return kw_token(kw);
 468 }
 469
 470 static void addcchar(char c)
 471 {
 472         if(cbufidx >= cbufalloc)
 473         {
 474                 cbufalloc += 1024;
 475                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 476                 if(cbufalloc > 65536)
 477                         parser_warning("Reallocating string buffer larger than 64kB\n");
 478         }
 479         cbuffer[cbufidx++] = c;
 480 }
 481
 482 static char *get_buffered_cstring(void)
 483 {
 484         addcchar(0);
 485         return xstrdup(cbuffer);
 486 }
 487
 488 void pop_import(void)
 489 {
 490         int ptr = import_stack_ptr-1;
 491
 492         fclose(yyin);
 493         yy_delete_buffer( YY_CURRENT_BUFFER );
 494         yy_switch_to_buffer( import_stack[ptr].state );
 495         if (temp_name) {
 496                 unlink(temp_name);
 497                 free(temp_name);
 498         }
 499         temp_name = import_stack[ptr].temp_name;
 500         input_name = import_stack[ptr].input_name;
 501         line_number = import_stack[ptr].line_number;
 502         import_stack_ptr--;
 503 }
 504
 505 struct imports {
 506     char *name;
 507     struct imports *next;
 508 } *first_import;
 509
 510 int do_import(char *fname)
 511 {
 512     FILE *f;
 513     char *path, *name;
 514     struct imports *import;
 515     int ptr = import_stack_ptr;
 516     int ret, fd;
 517
 518     import = first_import;
 519     while (import && strcmp(import->name, fname))
 520         import = import->next;
 521     if (import) return 0; /* already imported */
 522
 523     import = xmalloc(sizeof(struct imports));
 524     import->name = xstrdup(fname);
 525     import->next = first_import;
 526     first_import = import;
 527
 528     /* don't search for a file name with a path in the include directories,
 529      * for compatibility with MIDL */
 530     if (strchr( fname, '/' ) || strchr( fname, '\\' ))
 531         path = xstrdup( fname );
 532     else if (!(path = wpp_find_include( fname, input_name )))
 533         error_loc("Unable to open include file %s\n", fname);
 534
 535     if (import_stack_ptr == MAX_IMPORT_DEPTH)
 536         error_loc("Exceeded max import depth\n");
 537
 538     import_stack[ptr].temp_name = temp_name;
 539     import_stack[ptr].input_name = input_name;
 540     import_stack[ptr].line_number = line_number;
 541     import_stack_ptr++;
 542     input_name = path;
 543     line_number = 1;
 544
 545     name = xstrdup( "widl.XXXXXX" );
 546     if((fd = mkstemps( name, 0 )) == -1)
 547         error("Could not generate a temp name from %s\n", name);
 548
 549     temp_name = name;
 550     if (!(f = fdopen(fd, "wt")))
 551         error("Could not open fd %s for writing\n", name);
 552
 553     ret = wpp_parse( path, f );
 554     fclose( f );
 555     if (ret) exit(1);
 556
 557     if((f = fopen(temp_name, "r")) == NULL)
 558         error_loc("Unable to open %s\n", temp_name);
 559
 560     import_stack[ptr].state = YY_CURRENT_BUFFER;
 561     yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 562     return 1;
 563 }
 564
 565 void abort_import(void)
 566 {
 567         int ptr;
 568
 569         for (ptr=0; ptr<import_stack_ptr; ptr++)
 570                 unlink(import_stack[ptr].temp_name);
 571 }
 572
 573 static void switch_to_acf(void)
 574 {
 575     int ptr = import_stack_ptr;
 576     int ret, fd;
 577     char *name;
 578     FILE *f;
 579
 580     assert(import_stack_ptr == 0);
 581
 582     input_name = acf_name;
 583     acf_name = NULL;
 584     line_number = 1;
 585
 586     name = xstrdup( "widl.XXXXXX" );
 587     if((fd = mkstemps( name, 0 )) == -1)
 588         error("Could not generate a temp name from %s\n", name);
 589
 590     temp_name = name;
 591     if (!(f = fdopen(fd, "wt")))
 592         error("Could not open fd %s for writing\n", name);
 593
 594     ret = wpp_parse(input_name, f);
 595     fclose(f);
 596     if (ret) exit(1);
 597
 598     if((f = fopen(temp_name, "r")) == NULL)
 599         error_loc("Unable to open %s\n", temp_name);
 600
 601     import_stack[ptr].state = YY_CURRENT_BUFFER;
 602     yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 603 }
 604
 605 static void warning_disable(int warning)
 606 {
 607     warning_t *warning_entry;
 608     LIST_FOR_EACH_ENTRY(warning_entry, disabled_warnings, warning_t, entry)
 609         if(warning_entry->num == warning)
 610             return;
 611     warning_entry = xmalloc( sizeof(*warning_entry) );
 612     warning_entry->num = warning;
 613     list_add_tail(disabled_warnings, &warning_entry->entry);
 614 }
 615
 616 static void warning_enable(int warning)
 617 {
 618     warning_t *warning_entry;
 619     LIST_FOR_EACH_ENTRY(warning_entry, disabled_warnings, warning_t, entry)
 620         if(warning_entry->num == warning)
 621         {
 622             list_remove(&warning_entry->entry);
 623             free(warning_entry);
 624             break;
 625         }
 626 }
 627
 628 int do_warning(char *toggle, warning_list_t *wnum)
 629 {
 630     warning_t *warning, *next;
 631     int ret = 1;
 632     if(!disabled_warnings)
 633     {
 634         disabled_warnings = xmalloc( sizeof(*disabled_warnings) );
 635         list_init( disabled_warnings );
 636     }
 637
 638     if(!strcmp(toggle, "disable"))
 639         LIST_FOR_EACH_ENTRY(warning, wnum, warning_t, entry)
 640             warning_disable(warning->num);
 641     else if(!strcmp(toggle, "enable"))
 642         LIST_FOR_EACH_ENTRY(warning, wnum, warning_t, entry)
 643             warning_enable(warning->num);
 644     else
 645         ret = 0;
 646
 647     LIST_FOR_EACH_ENTRY_SAFE(warning, next, wnum, warning_t, entry)
 648         free(warning);
 649     return ret;
 650 }
 651
 652 int is_warning_enabled(int warning)
 653 {
 654     warning_t *warning_entry;
 655     if(!disabled_warnings)
 656         return 1;
 657     LIST_FOR_EACH_ENTRY(warning_entry, disabled_warnings, warning_t, entry)
 658         if(warning_entry->num == warning)
 659             return 0;
 660     return 1;
 661 }