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 #define YY_USE_PROTOS
  57 #define YY_NO_UNPUT
  58 #define YY_NO_TOP_STATE
  59
  60 extern char *temp_name;
  61
  62 static void addcchar(char c);
  63 static char *get_buffered_cstring(void);
  64
  65 static char *cbuffer;
  66 static int cbufidx;
  67 static int cbufalloc = 0;
  68
  69 static int kw_token(const char *kw);
  70
  71 #define MAX_IMPORT_DEPTH 10
  72 struct {
  73   YY_BUFFER_STATE state;
  74   char *input_name;
  75   int   line_number;
  76   char *temp_name;
  77 } import_stack[MAX_IMPORT_DEPTH];
  78 int import_stack_ptr = 0;
  79
  80 static void pop_import(void);
  81
  82 static UUID* parse_uuid(const char*u)
  83 {
  84   UUID* uuid = xmalloc(sizeof(UUID));
  85   char b[3];
  86   /* it would be nice to use UuidFromStringA */
  87   uuid->Data1 = strtoul(u, NULL, 16);
  88   uuid->Data2 = strtoul(u+9, NULL, 16);
  89   uuid->Data3 = strtoul(u+14, NULL, 16);
  90   b[2] = 0;
  91   memcpy(b, u+19, 2); uuid->Data4[0] = strtoul(b, NULL, 16);
  92   memcpy(b, u+21, 2); uuid->Data4[1] = strtoul(b, NULL, 16);
  93   memcpy(b, u+24, 2); uuid->Data4[2] = strtoul(b, NULL, 16);
  94   memcpy(b, u+26, 2); uuid->Data4[3] = strtoul(b, NULL, 16);
  95   memcpy(b, u+28, 2); uuid->Data4[4] = strtoul(b, NULL, 16);
  96   memcpy(b, u+30, 2); uuid->Data4[5] = strtoul(b, NULL, 16);
  97   memcpy(b, u+32, 2); uuid->Data4[6] = strtoul(b, NULL, 16);
  98   memcpy(b, u+34, 2); uuid->Data4[7] = strtoul(b, NULL, 16);
  99   return uuid;
 100 }
 101
 102 %}
 103
 104 /*
 105  **************************************************************************
 106  * The flexer starts here
 107  **************************************************************************
 108  */
 109 %%
 110 <INITIAL>^{ws}*\#{ws}*  yy_push_state(pp_line);
 111 <pp_line>[^\n]*         {
 112                             int lineno;
 113                             char *cptr, *fname;
 114                             yy_pop_state();
 115                             lineno = (int)strtol(yytext, &cptr, 10);
 116                             if(!lineno)
 117                                 yyerror("Malformed '#...' line-directive; invalid linenumber");
 118                             fname = strchr(cptr, '"');
 119                             if(!fname)
 120                                 yyerror("Malformed '#...' line-directive; missing filename");
 121                             fname++;
 122                             cptr = strchr(fname, '"');
 123                             if(!cptr)
 124                                 yyerror("Malformed '#...' line-directive; missing terminating \"");
 125                             *cptr = '\0';
 126                             line_number = lineno - 1;  /* We didn't read the newline */
 127                             free( input_name );
 128                             input_name = xstrdup(fname);
 129                         }
 130 \"                      yy_push_state(QUOTE); cbufidx = 0;
 131 <QUOTE>\"               {
 132                                 yy_pop_state();
 133                                 yylval.str = get_buffered_cstring();
 134                                 return aSTRING;
 135                         }
 136 <QUOTE>\\\\             |
 137 <QUOTE>\\\"             addcchar(yytext[1]);
 138 <QUOTE>\\.              addcchar('\\'); addcchar(yytext[1]);
 139 <QUOTE>.                addcchar(yytext[0]);
 140 {uuid}                  {
 141                                 yylval.uuid = parse_uuid(yytext);
 142                                 return aUUID;
 143                         }
 144 {hex}                   {
 145                                 yylval.num = strtoul(yytext, NULL, 0);
 146                                 return aHEXNUM;
 147                         }
 148 {int}                   {
 149                                 yylval.num = strtoul(yytext, NULL, 0);
 150                                 return aNUM;
 151                         }
 152 {cident}                return kw_token(yytext);
 153 \n                      line_number++;
 154 {ws}
 155 \<\<                    return SHL;
 156 \>\>                    return SHR;
 157 .                       return yytext[0];
 158 <<EOF>>                 {
 159                                 if (import_stack_ptr) {
 160                                         pop_import();
 161                                         return aEOF;
 162                                 }
 163                                 else yyterminate();
 164                         }
 165 %%
 166
 167 #ifndef yywrap
 168 int yywrap(void)
 169 {
 170         return 1;
 171 }
 172 #endif
 173
 174 static struct keyword {
 175         const char *kw;
 176         int token;
 177         int val;
 178 } keywords[] = {
 179         {"__cdecl",                     tCDECL},
 180         {"__int64",                     tINT64},
 181         {"__stdcall",                   tSTDCALL},
 182         {"_stdcall",                    tSTDCALL},
 183         {"aggregatable",                tAGGREGATABLE},
 184         {"allocate",                    tALLOCATE},
 185         {"appobject",                   tAPPOBJECT},
 186         {"arrays",                      tARRAYS},
 187         {"async",                       tASYNC},
 188         {"async_uuid",                  tASYNCUUID},
 189         {"auto_handle",                 tAUTOHANDLE},
 190         {"bindable",                    tBINDABLE},
 191         {"boolean",                     tBOOLEAN},
 192         {"broadcast",                   tBROADCAST},
 193         {"byte",                        tBYTE},
 194         {"byte_count",                  tBYTECOUNT},
 195         {"call_as",                     tCALLAS},
 196         {"callback",                    tCALLBACK},
 197         {"case",                        tCASE},
 198         {"char",                        tCHAR},
 199         {"coclass",                     tCOCLASS},
 200         {"code",                        tCODE},
 201         {"comm_status",                 tCOMMSTATUS},
 202         {"const",                       tCONST},
 203         {"context_handle",              tCONTEXTHANDLE},
 204         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 205         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 206         {"control",                     tCONTROL},
 207         {"cpp_quote",                   tCPPQUOTE},
 208 /* ... */
 209         {"default",                     tDEFAULT},
 210         {"defaultvalue",                tDEFAULTVALUE},
 211 /* ... */
 212         {"dispinterface",               tDISPINTERFACE},
 213 /* ... */
 214         {"displaybind",                 tDISPLAYBIND},
 215         {"dllname",                     tDLLNAME},
 216         {"double",                      tDOUBLE},
 217         {"dual",                        tDUAL},
 218 /* ... */
 219         {"endpoint",                    tENDPOINT},
 220         {"entry",                       tENTRY},
 221         {"enum",                        tENUM},
 222         {"error_status_t",              tERRORSTATUST},
 223         {"explicit_handle",             tEXPLICITHANDLE},
 224         {"extern",                      tEXTERN},
 225 /* ... */
 226         {"float",                       tFLOAT},
 227 /* ... */
 228         {"handle",                      tHANDLE},
 229         {"handle_t",                    tHANDLET},
 230 /* ... */
 231         {"helpcontext",                 tHELPCONTEXT},
 232         {"helpfile",                    tHELPFILE},
 233         {"helpstring",                  tHELPSTRING},
 234         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 235         {"helpstringdll",               tHELPSTRINGDLL},
 236 /* ... */
 237         {"hidden",                      tHIDDEN},
 238         {"hyper",                       tHYPER},
 239         {"id",                          tID},
 240         {"idempotent",                  tIDEMPOTENT},
 241 /* ... */
 242         {"iid_is",                      tIIDIS},
 243 /* ... */
 244         {"implicit_handle",             tIMPLICITHANDLE},
 245         {"import",                      tIMPORT},
 246         {"importlib",                   tIMPORTLIB},
 247         {"in",                          tIN},
 248         {"include",                     tINCLUDE},
 249         {"in_line",                     tINLINE},
 250         {"input_sync",                  tINPUTSYNC},
 251         {"int",                         tINT},
 252 /* ... */
 253         {"interface",                   tINTERFACE},
 254 /* ... */
 255         {"length_is",                   tLENGTHIS},
 256         {"library",                     tLIBRARY},
 257 /* ... */
 258         {"local",                       tLOCAL},
 259         {"long",                        tLONG},
 260 /* ... */
 261         {"methods",                     tMETHODS},
 262 /* ... */
 263         {"module",                      tMODULE},
 264 /* ... */
 265         {"noncreatable",                tNONCREATABLE},
 266         {"object",                      tOBJECT},
 267         {"odl",                         tODL},
 268         {"oleautomation",               tOLEAUTOMATION},
 269 /* ... */
 270         {"optional",                    tOPTIONAL},
 271         {"out",                         tOUT},
 272 /* ... */
 273         {"pointer_default",             tPOINTERDEFAULT},
 274 /* ... */
 275         {"properties",                  tPROPERTIES},
 276         {"propget",                     tPROPGET},
 277         {"propput",                     tPROPPUT},
 278         {"propputref",                  tPROPPUTREF},
 279         {"ptr",                         tPTR},
 280 /* ... */
 281         {"public",                      tPUBLIC},
 282         {"range",                       tRANGE},
 283 /* ... */
 284         {"readonly",                    tREADONLY},
 285         {"ref",                         tREF},
 286 /* ... */
 287         {"restricted",                  tRESTRICTED},
 288         {"retval",                      tRETVAL},
 289 /* ... */
 290         {"short",                       tSHORT},
 291         {"signed",                      tSIGNED},
 292         {"single",                      tSINGLE},
 293         {"size_is",                     tSIZEIS},
 294         {"sizeof",                      tSIZEOF},
 295         {"small",                       tSMALL},
 296 /* ... */
 297         {"source",                      tSOURCE},
 298 /* ... */
 299         {"string",                      tSTRING},
 300         {"struct",                      tSTRUCT},
 301         {"switch",                      tSWITCH},
 302         {"switch_is",                   tSWITCHIS},
 303         {"switch_type",                 tSWITCHTYPE},
 304 /* ... */
 305         {"transmit_as",                 tTRANSMITAS},
 306         {"typedef",                     tTYPEDEF},
 307         {"union",                       tUNION},
 308 /* ... */
 309         {"unique",                      tUNIQUE},
 310         {"unsigned",                    tUNSIGNED},
 311 /* ... */
 312         {"uuid",                        tUUID},
 313         {"v1_enum",                     tV1ENUM},
 314 /* ... */
 315         {"vararg",                      tVARARG},
 316         {"version",                     tVERSION},
 317         {"void",                        tVOID},
 318         {"wchar_t",                     tWCHAR},
 319         {"wire_marshal",                tWIREMARSHAL}
 320 };
 321 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 322 #define KWP(p) ((const struct keyword *)(p))
 323
 324 static int kw_cmp_func(const void *s1, const void *s2)
 325 {
 326         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 327 }
 328
 329 #define KW_BSEARCH
 330 static int kw_token(const char *kw)
 331 {
 332         struct keyword key, *kwp;
 333         key.kw = kw;
 334 #ifdef KW_BSEARCH
 335         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 336 #else
 337         {
 338                 int i;
 339                 for (kwp=NULL, i=0; i < NKEYWORDS; i++)
 340                         if (!kw_cmp_func(&key, &keywords[i])) {
 341                                 kwp = &keywords[i];
 342                                 break;
 343                         }
 344         }
 345 #endif
 346         if (kwp) {
 347                 yylval.str = (char*)kwp->kw;
 348                 return kwp->token;
 349         }
 350         yylval.str = xstrdup(kw);
 351         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 352 }
 353
 354 static void addcchar(char c)
 355 {
 356         if(cbufidx >= cbufalloc)
 357         {
 358                 cbufalloc += 1024;
 359                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 360                 if(cbufalloc > 65536)
 361                         yywarning("Reallocating string buffer larger than 64kB");
 362         }
 363         cbuffer[cbufidx++] = c;
 364 }
 365
 366 static char *get_buffered_cstring(void)
 367 {
 368         addcchar(0);
 369         return xstrdup(cbuffer);
 370 }
 371
 372 static void pop_import(void)
 373 {
 374         int ptr = import_stack_ptr-1;
 375
 376         fclose(yyin);
 377         yy_delete_buffer( YY_CURRENT_BUFFER );
 378         yy_switch_to_buffer( import_stack[ptr].state );
 379         if (temp_name) {
 380                 unlink(temp_name);
 381                 free(temp_name);
 382         }
 383         temp_name = import_stack[ptr].temp_name;
 384         free( input_name );
 385         input_name = import_stack[ptr].input_name;
 386         line_number = import_stack[ptr].line_number;
 387         import_stack_ptr--;
 388 }
 389
 390 struct imports {
 391         char *name;
 392         struct imports *next;
 393 } *first_import;
 394
 395 int do_import(char *fname)
 396 {
 397         FILE *f;
 398         char *hname, *path, *p;
 399         struct imports *import;
 400         int ptr = import_stack_ptr;
 401         int ret;
 402
 403         if (!parse_only && do_header) {
 404                 hname = dup_basename(fname, ".idl");
 405                 p = hname + strlen(hname) - 2;
 406                 if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
 407
 408                 fprintf(header, "#include <%s>\n", hname);
 409                 free(hname);
 410         }
 411
 412         import = first_import;
 413         while (import && strcmp(import->name, fname))
 414                 import = import->next;
 415         if (import) return 0; /* already imported */
 416
 417         import = xmalloc(sizeof(struct imports));
 418         import->name = xstrdup(fname);
 419         import->next = first_import;
 420         first_import = import;
 421
 422         if (!(path = wpp_find_include( fname, input_name )))
 423             yyerror("Unable to open include file %s", fname);
 424
 425         import_stack[ptr].temp_name = temp_name;
 426         import_stack[ptr].input_name = input_name;
 427         import_stack[ptr].line_number = line_number;
 428         import_stack_ptr++;
 429         input_name = path;
 430         line_number = 1;
 431
 432         ret = wpp_parse_temp( path, NULL, &temp_name );
 433         if (ret) exit(1);
 434
 435         if((f = fopen(temp_name, "r")) == NULL)
 436                 yyerror("Unable to open %s", temp_name);
 437
 438         import_stack[ptr].state = YY_CURRENT_BUFFER;
 439         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 440         return 1;
 441 }
 442
 443 void abort_import(void)
 444 {
 445         int ptr;
 446
 447         for (ptr=0; ptr<import_stack_ptr; ptr++)
 448                 unlink(import_stack[ptr].temp_name);
 449 }