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