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 SQUOTE
  41
  42 %{
  43
  44 #include "config.h"
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <ctype.h>
  50 #include <assert.h>
  51 #include <errno.h>
  52 #include <limits.h>
  53
  54 #ifdef HAVE_UNISTD_H
  55 #include <unistd.h>
  56 #else
  57 #define YY_NO_UNISTD_H
  58 #endif
  59
  60 #include "widl.h"
  61 #include "utils.h"
  62 #include "parser.h"
  63 #include "wine/wpp.h"
  64
  65 #include "parser.tab.h"
  66
  67 static void addcchar(char c);
  68 static char *get_buffered_cstring(void);
  69
  70 static char *cbuffer;
  71 static int cbufidx;
  72 static int cbufalloc = 0;
  73
  74 static int kw_token(const char *kw);
  75 static int attr_token(const char *kw);
  76
  77 #define MAX_IMPORT_DEPTH 10
  78 struct {
  79   YY_BUFFER_STATE state;
  80   char *input_name;
  81   int   line_number;
  82   char *temp_name;
  83 } import_stack[MAX_IMPORT_DEPTH];
  84 int import_stack_ptr = 0;
  85
  86 /* converts an integer in string form to an unsigned long and prints an error
  87  * on overflow */
  88 static unsigned long xstrtoul(const char *nptr, char **endptr, int base)
  89 {
  90     unsigned long l;
  91
  92     errno = 0;
  93     l = strtoul(nptr, endptr, base);
  94     if (l == ULONG_MAX && errno == ERANGE)
  95         error_loc("integer constant %s is too large\n", nptr);
  96     return l;
  97 }
  98
  99 UUID *parse_uuid(const char *u)
 100 {
 101   UUID* uuid = xmalloc(sizeof(UUID));
 102   char b[3];
 103   /* it would be nice to use UuidFromStringA */
 104   uuid->Data1 = strtoul(u, NULL, 16);
 105   uuid->Data2 = strtoul(u+9, NULL, 16);
 106   uuid->Data3 = strtoul(u+14, NULL, 16);
 107   b[2] = 0;
 108   memcpy(b, u+19, 2); uuid->Data4[0] = strtoul(b, NULL, 16);
 109   memcpy(b, u+21, 2); uuid->Data4[1] = strtoul(b, NULL, 16);
 110   memcpy(b, u+24, 2); uuid->Data4[2] = strtoul(b, NULL, 16);
 111   memcpy(b, u+26, 2); uuid->Data4[3] = strtoul(b, NULL, 16);
 112   memcpy(b, u+28, 2); uuid->Data4[4] = strtoul(b, NULL, 16);
 113   memcpy(b, u+30, 2); uuid->Data4[5] = strtoul(b, NULL, 16);
 114   memcpy(b, u+32, 2); uuid->Data4[6] = strtoul(b, NULL, 16);
 115   memcpy(b, u+34, 2); uuid->Data4[7] = strtoul(b, NULL, 16);
 116   return uuid;
 117 }
 118
 119 %}
 120
 121 /*
 122  **************************************************************************
 123  * The flexer starts here
 124  **************************************************************************
 125  */
 126 %%
 127 <INITIAL,ATTR>^{ws}*\#{ws}*     yy_push_state(PP_LINE);
 128 <PP_LINE>[^\n]*         {
 129                             int lineno;
 130                             char *cptr, *fname;
 131                             yy_pop_state();
 132                             lineno = (int)strtol(yytext, &cptr, 10);
 133                             if(!lineno)
 134                                 error_loc("Malformed '#...' line-directive; invalid linenumber\n");
 135                             fname = strchr(cptr, '"');
 136                             if(!fname)
 137                                 error_loc("Malformed '#...' line-directive; missing filename\n");
 138                             fname++;
 139                             cptr = strchr(fname, '"');
 140                             if(!cptr)
 141                                 error_loc("Malformed '#...' line-directive; missing terminating \"\n");
 142                             *cptr = '\0';
 143                             line_number = lineno - 1;  /* We didn't read the newline */
 144                             free( input_name );
 145                             input_name = xstrdup(fname);
 146                         }
 147 <INITIAL,ATTR>\"        yy_push_state(QUOTE); cbufidx = 0;
 148 <QUOTE>\"               {
 149                                 yy_pop_state();
 150                                 parser_lval.str = get_buffered_cstring();
 151                                 return aSTRING;
 152                         }
 153 <INITIAL,ATTR>L\"       yy_push_state(WSTRQUOTE);
 154 <WSTRQUOTE>\"           {
 155                                 yy_pop_state();
 156                                 parser_lval.str = get_buffered_cstring();
 157                                 return aWSTRING;
 158                         }
 159 <INITIAL,ATTR>\'        yy_push_state(SQUOTE); cbufidx = 0;
 160 <SQUOTE>\'              {
 161                                 yy_pop_state();
 162                                 parser_lval.str = get_buffered_cstring();
 163                                 return aSQSTRING;
 164                         }
 165 <QUOTE,WSTRQUOTE,SQUOTE>\\\\    |
 166 <QUOTE,WSTRQUOTE>\\\"   addcchar(yytext[1]);
 167 <SQUOTE>\\\'    addcchar(yytext[1]);
 168 <QUOTE,WSTRQUOTE,SQUOTE>\\.     addcchar('\\'); addcchar(yytext[1]);
 169 <QUOTE,WSTRQUOTE,SQUOTE>.       addcchar(yytext[0]);
 170 <INITIAL,ATTR>\[        yy_push_state(ATTR); return '[';
 171 <ATTR>\]                yy_pop_state(); return ']';
 172 <ATTR>{cident}          return attr_token(yytext);
 173 <ATTR>{uuid}                    {
 174                                 parser_lval.uuid = parse_uuid(yytext);
 175                                 return aUUID;
 176                         }
 177 <INITIAL,ATTR>{hex}     {
 178                                 parser_lval.num = xstrtoul(yytext, NULL, 0);
 179                                 return aHEXNUM;
 180                         }
 181 <INITIAL,ATTR>{int}     {
 182                                 parser_lval.num = xstrtoul(yytext, NULL, 0);
 183                                 return aNUM;
 184                         }
 185 <INITIAL>{double}       {
 186                                 parser_lval.dbl = strtod(yytext, NULL);
 187                                 return aDOUBLE;
 188                         }
 189 SAFEARRAY{ws}*/\(       return tSAFEARRAY;
 190 {cident}                return kw_token(yytext);
 191 <INITIAL,ATTR>\n        line_number++;
 192 <INITIAL,ATTR>{ws}
 193 <INITIAL,ATTR>\<\<      return SHL;
 194 <INITIAL,ATTR>\>\>      return SHR;
 195 <INITIAL,ATTR>\-\>      return MEMBERPTR;
 196 <INITIAL,ATTR>==        return EQUALITY;
 197 <INITIAL,ATTR>!=        return INEQUALITY;
 198 <INITIAL,ATTR>\>=       return GREATEREQUAL;
 199 <INITIAL,ATTR>\<=       return LESSEQUAL;
 200 <INITIAL,ATTR>\|\|      return LOGICALOR;
 201 <INITIAL,ATTR>&&        return LOGICALAND;
 202 <INITIAL,ATTR>\.\.\.    return ELLIPSIS;
 203 <INITIAL,ATTR>.         return yytext[0];
 204 <<EOF>>                 {
 205                                 if (import_stack_ptr)
 206                                         return aEOF;
 207                                 else yyterminate();
 208                         }
 209 %%
 210
 211 #ifndef parser_wrap
 212 int parser_wrap(void)
 213 {
 214         return 1;
 215 }
 216 #endif
 217
 218 struct keyword {
 219         const char *kw;
 220         int token;
 221 };
 222
 223 /* This table MUST be alphabetically sorted on the kw field */
 224 static const struct keyword keywords[] = {
 225         {"FALSE",                       tFALSE},
 226         {"NULL",                        tNULL},
 227         {"TRUE",                        tTRUE},
 228         {"__cdecl",                     tCDECL},
 229         {"__fastcall",                  tFASTCALL},
 230         {"__int3264",                   tINT3264},
 231         {"__int64",                     tINT64},
 232         {"__pascal",                    tPASCAL},
 233         {"__stdcall",                   tSTDCALL},
 234         {"_cdecl",                      tCDECL},
 235         {"_fastcall",                   tFASTCALL},
 236         {"_pascal",                     tPASCAL},
 237         {"_stdcall",                    tSTDCALL},
 238         {"boolean",                     tBOOLEAN},
 239         {"byte",                        tBYTE},
 240         {"case",                        tCASE},
 241         {"cdecl",                       tCDECL},
 242         {"char",                        tCHAR},
 243         {"coclass",                     tCOCLASS},
 244         {"const",                       tCONST},
 245         {"cpp_quote",                   tCPPQUOTE},
 246         {"default",                     tDEFAULT},
 247         {"dispinterface",               tDISPINTERFACE},
 248         {"double",                      tDOUBLE},
 249         {"enum",                        tENUM},
 250         {"error_status_t",              tERRORSTATUST},
 251         {"extern",                      tEXTERN},
 252         {"float",                       tFLOAT},
 253         {"handle_t",                    tHANDLET},
 254         {"hyper",                       tHYPER},
 255         {"import",                      tIMPORT},
 256         {"importlib",                   tIMPORTLIB},
 257         {"inline",                      tINLINE},
 258         {"int",                         tINT},
 259         {"interface",                   tINTERFACE},
 260         {"library",                     tLIBRARY},
 261         {"long",                        tLONG},
 262         {"methods",                     tMETHODS},
 263         {"module",                      tMODULE},
 264         {"pascal",                      tPASCAL},
 265         {"properties",                  tPROPERTIES},
 266         {"register",                    tREGISTER},
 267         {"short",                       tSHORT},
 268         {"signed",                      tSIGNED},
 269         {"sizeof",                      tSIZEOF},
 270         {"small",                       tSMALL},
 271         {"static",                      tSTATIC},
 272         {"stdcall",                     tSTDCALL},
 273         {"struct",                      tSTRUCT},
 274         {"switch",                      tSWITCH},
 275         {"typedef",                     tTYPEDEF},
 276         {"union",                       tUNION},
 277         {"unsigned",                    tUNSIGNED},
 278         {"void",                        tVOID},
 279         {"wchar_t",                     tWCHAR},
 280 };
 281 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 282
 283 /* keywords only recognized in attribute lists
 284  * This table MUST be alphabetically sorted on the kw field
 285  */
 286 static const struct keyword attr_keywords[] =
 287 {
 288         {"aggregatable",                tAGGREGATABLE},
 289         {"allocate",                    tALLOCATE},
 290         {"annotation",                  tANNOTATION},
 291         {"appobject",                   tAPPOBJECT},
 292         {"async",                       tASYNC},
 293         {"async_uuid",                  tASYNCUUID},
 294         {"auto_handle",                 tAUTOHANDLE},
 295         {"bindable",                    tBINDABLE},
 296         {"broadcast",                   tBROADCAST},
 297         {"byte_count",                  tBYTECOUNT},
 298         {"call_as",                     tCALLAS},
 299         {"callback",                    tCALLBACK},
 300         {"code",                        tCODE},
 301         {"comm_status",                 tCOMMSTATUS},
 302         {"context_handle",              tCONTEXTHANDLE},
 303         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 304         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 305         {"control",                     tCONTROL},
 306         {"defaultcollelem",             tDEFAULTCOLLELEM},
 307         {"defaultvalue",                tDEFAULTVALUE},
 308         {"defaultvtable",               tDEFAULTVTABLE},
 309         {"displaybind",                 tDISPLAYBIND},
 310         {"dllname",                     tDLLNAME},
 311         {"dual",                        tDUAL},
 312         {"endpoint",                    tENDPOINT},
 313         {"entry",                       tENTRY},
 314         {"explicit_handle",             tEXPLICITHANDLE},
 315         {"handle",                      tHANDLE},
 316         {"helpcontext",                 tHELPCONTEXT},
 317         {"helpfile",                    tHELPFILE},
 318         {"helpstring",                  tHELPSTRING},
 319         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 320         {"helpstringdll",               tHELPSTRINGDLL},
 321         {"hidden",                      tHIDDEN},
 322         {"id",                          tID},
 323         {"idempotent",                  tIDEMPOTENT},
 324         {"iid_is",                      tIIDIS},
 325         {"immediatebind",               tIMMEDIATEBIND},
 326         {"implicit_handle",             tIMPLICITHANDLE},
 327         {"in",                          tIN},
 328         {"in_line",                     tIN_LINE},
 329         {"input_sync",                  tINPUTSYNC},
 330         {"lcid",                        tLCID},
 331         {"length_is",                   tLENGTHIS},
 332         {"local",                       tLOCAL},
 333         {"nonbrowsable",                tNONBROWSABLE},
 334         {"noncreatable",                tNONCREATABLE},
 335         {"nonextensible",               tNONEXTENSIBLE},
 336         {"object",                      tOBJECT},
 337         {"odl",                         tODL},
 338         {"oleautomation",               tOLEAUTOMATION},
 339         {"optional",                    tOPTIONAL},
 340         {"out",                         tOUT},
 341         {"pointer_default",             tPOINTERDEFAULT},
 342         {"propget",                     tPROPGET},
 343         {"propput",                     tPROPPUT},
 344         {"propputref",                  tPROPPUTREF},
 345         {"ptr",                         tPTR},
 346         {"public",                      tPUBLIC},
 347         {"range",                       tRANGE},
 348         {"readonly",                    tREADONLY},
 349         {"ref",                         tREF},
 350         {"requestedit",                 tREQUESTEDIT},
 351         {"restricted",                  tRESTRICTED},
 352         {"retval",                      tRETVAL},
 353         {"size_is",                     tSIZEIS},
 354         {"source",                      tSOURCE},
 355         {"strict_context_handle",       tSTRICTCONTEXTHANDLE},
 356         {"string",                      tSTRING},
 357         {"switch_is",                   tSWITCHIS},
 358         {"switch_type",                 tSWITCHTYPE},
 359         {"transmit_as",                 tTRANSMITAS},
 360         {"unique",                      tUNIQUE},
 361         {"uuid",                        tUUID},
 362         {"v1_enum",                     tV1ENUM},
 363         {"vararg",                      tVARARG},
 364         {"version",                     tVERSION},
 365         {"wire_marshal",                tWIREMARSHAL},
 366 };
 367
 368
 369 #define KWP(p) ((const struct keyword *)(p))
 370
 371 static int kw_cmp_func(const void *s1, const void *s2)
 372 {
 373         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 374 }
 375
 376 static int kw_token(const char *kw)
 377 {
 378         struct keyword key, *kwp;
 379         key.kw = kw;
 380         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 381         if (kwp) {
 382                 parser_lval.str = xstrdup(kwp->kw);
 383                 return kwp->token;
 384         }
 385         parser_lval.str = xstrdup(kw);
 386         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 387 }
 388
 389 static int attr_token(const char *kw)
 390 {
 391         struct keyword key, *kwp;
 392         key.kw = kw;
 393         kwp = bsearch(&key, attr_keywords, sizeof(attr_keywords)/sizeof(attr_keywords[0]),
 394                       sizeof(attr_keywords[0]), kw_cmp_func);
 395         if (kwp) {
 396             parser_lval.str = xstrdup(kwp->kw);
 397             return kwp->token;
 398         }
 399         return kw_token(kw);
 400 }
 401
 402 static void addcchar(char c)
 403 {
 404         if(cbufidx >= cbufalloc)
 405         {
 406                 cbufalloc += 1024;
 407                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 408                 if(cbufalloc > 65536)
 409                         parser_warning("Reallocating string buffer larger than 64kB\n");
 410         }
 411         cbuffer[cbufidx++] = c;
 412 }
 413
 414 static char *get_buffered_cstring(void)
 415 {
 416         addcchar(0);
 417         return xstrdup(cbuffer);
 418 }
 419
 420 void pop_import(void)
 421 {
 422         int ptr = import_stack_ptr-1;
 423
 424         fclose(yyin);
 425         yy_delete_buffer( YY_CURRENT_BUFFER );
 426         yy_switch_to_buffer( import_stack[ptr].state );
 427         if (temp_name) {
 428                 unlink(temp_name);
 429                 free(temp_name);
 430         }
 431         temp_name = import_stack[ptr].temp_name;
 432         input_name = import_stack[ptr].input_name;
 433         line_number = import_stack[ptr].line_number;
 434         import_stack_ptr--;
 435 }
 436
 437 struct imports {
 438         char *name;
 439         struct imports *next;
 440 } *first_import;
 441
 442 int do_import(char *fname)
 443 {
 444         FILE *f;
 445         char *path;
 446         struct imports *import;
 447         int ptr = import_stack_ptr;
 448         int ret;
 449
 450         import = first_import;
 451         while (import && strcmp(import->name, fname))
 452                 import = import->next;
 453         if (import) return 0; /* already imported */
 454
 455         import = xmalloc(sizeof(struct imports));
 456         import->name = xstrdup(fname);
 457         import->next = first_import;
 458         first_import = import;
 459
 460         /* don't search for a file name with a path in the include directories,
 461          * for compatibility with MIDL */
 462         if (strchr( fname, '/' ) || strchr( fname, '\\' ))
 463             path = strdup( fname );
 464         else if (!(path = wpp_find_include( fname, input_name )))
 465             error_loc("Unable to open include file %s\n", fname);
 466
 467         import_stack[ptr].temp_name = temp_name;
 468         import_stack[ptr].input_name = input_name;
 469         import_stack[ptr].line_number = line_number;
 470         import_stack_ptr++;
 471         input_name = path;
 472         line_number = 1;
 473
 474         ret = wpp_parse_temp( path, NULL, &temp_name );
 475         if (ret) exit(1);
 476
 477         if((f = fopen(temp_name, "r")) == NULL)
 478                 error_loc("Unable to open %s\n", temp_name);
 479
 480         import_stack[ptr].state = YY_CURRENT_BUFFER;
 481         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 482         return 1;
 483 }
 484
 485 void abort_import(void)
 486 {
 487         int ptr;
 488
 489         for (ptr=0; ptr<import_stack_ptr; ptr++)
 490                 unlink(import_stack[ptr].temp_name);
 491 }