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
  48 #ifndef HAVE_UNISTD_H
  49 #define YY_NO_UNISTD_H
  50 #endif
  51
  52 #include "widl.h"
  53 #include "utils.h"
  54 #include "parser.h"
  55 #include "wine/wpp.h"
  56
  57 #include "parser.tab.h"
  58
  59 extern char *temp_name;
  60
  61 static void addcchar(char c);
  62 static char *get_buffered_cstring(void);
  63
  64 static char *cbuffer;
  65 static int cbufidx;
  66 static int cbufalloc = 0;
  67
  68 static int kw_token(const char *kw);
  69 static int attr_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 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,ATTR>^{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                                 error_loc("Malformed '#...' line-directive; invalid linenumber\n");
 118                             fname = strchr(cptr, '"');
 119                             if(!fname)
 120                                 error_loc("Malformed '#...' line-directive; missing filename\n");
 121                             fname++;
 122                             cptr = strchr(fname, '"');
 123                             if(!cptr)
 124                                 error_loc("Malformed '#...' line-directive; missing terminating \"\n");
 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 <INITIAL,ATTR>\"        yy_push_state(QUOTE); cbufidx = 0;
 131 <QUOTE>\"               {
 132                                 yy_pop_state();
 133                                 parser_lval.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 <INITIAL,ATTR>\[        yy_push_state(ATTR); return '[';
 141 <ATTR>\]                yy_pop_state(); return ']';
 142 <ATTR>{cident}          return attr_token(yytext);
 143 <ATTR>{uuid}                    {
 144                                 parser_lval.uuid = parse_uuid(yytext);
 145                                 return aUUID;
 146                         }
 147 <INITIAL,ATTR>{hex}     {
 148                                 parser_lval.num = strtoul(yytext, NULL, 0);
 149                                 return aHEXNUM;
 150                         }
 151 <INITIAL,ATTR>{int}     {
 152                                 parser_lval.num = strtoul(yytext, NULL, 0);
 153                                 return aNUM;
 154                         }
 155 <INITIAL>{double}       {
 156                                 parser_lval.dbl = strtod(yytext, NULL);
 157                                 return aDOUBLE;
 158                         }
 159 SAFEARRAY{ws}*/\(       return tSAFEARRAY;
 160 {cident}                return kw_token(yytext);
 161 <INITIAL,ATTR>\n        line_number++;
 162 <INITIAL,ATTR>{ws}
 163 <INITIAL,ATTR>\<\<      return SHL;
 164 <INITIAL,ATTR>\>\>      return SHR;
 165 <INITIAL,ATTR>.         return yytext[0];
 166 <<EOF>>                 {
 167                                 if (import_stack_ptr) {
 168                                         pop_import();
 169                                         return aEOF;
 170                                 }
 171                                 else yyterminate();
 172                         }
 173 %%
 174
 175 #ifndef parser_wrap
 176 int parser_wrap(void)
 177 {
 178         return 1;
 179 }
 180 #endif
 181
 182 struct keyword {
 183         const char *kw;
 184         int token;
 185 };
 186
 187 static const struct keyword keywords[] = {
 188         {"FALSE",                       tFALSE},
 189         {"TRUE",                        tTRUE},
 190         {"__cdecl",                     tCDECL},
 191         {"__int64",                     tINT64},
 192         {"__stdcall",                   tSTDCALL},
 193         {"_stdcall",                    tSTDCALL},
 194         {"boolean",                     tBOOLEAN},
 195         {"byte",                        tBYTE},
 196         {"callback",                    tCALLBACK},
 197         {"case",                        tCASE},
 198         {"char",                        tCHAR},
 199         {"coclass",                     tCOCLASS},
 200         {"code",                        tCODE},
 201         {"comm_status",                 tCOMMSTATUS},
 202         {"const",                       tCONST},
 203         {"cpp_quote",                   tCPPQUOTE},
 204         {"default",                     tDEFAULT},
 205         {"dispinterface",               tDISPINTERFACE},
 206         {"double",                      tDOUBLE},
 207         {"enum",                        tENUM},
 208         {"error_status_t",              tERRORSTATUST},
 209         {"extern",                      tEXTERN},
 210         {"float",                       tFLOAT},
 211         {"handle_t",                    tHANDLET},
 212         {"hyper",                       tHYPER},
 213         {"import",                      tIMPORT},
 214         {"importlib",                   tIMPORTLIB},
 215         {"in_line",                     tINLINE},
 216         {"int",                         tINT},
 217         {"interface",                   tINTERFACE},
 218         {"library",                     tLIBRARY},
 219         {"long",                        tLONG},
 220         {"methods",                     tMETHODS},
 221         {"module",                      tMODULE},
 222         {"properties",                  tPROPERTIES},
 223         {"short",                       tSHORT},
 224         {"signed",                      tSIGNED},
 225         {"sizeof",                      tSIZEOF},
 226         {"small",                       tSMALL},
 227         {"struct",                      tSTRUCT},
 228         {"switch",                      tSWITCH},
 229         {"typedef",                     tTYPEDEF},
 230         {"union",                       tUNION},
 231         {"unsigned",                    tUNSIGNED},
 232         {"void",                        tVOID},
 233         {"wchar_t",                     tWCHAR},
 234 };
 235 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 236
 237 /* keywords only recognized in attribute lists */
 238 static const struct keyword attr_keywords[] =
 239 {
 240         {"aggregatable",                tAGGREGATABLE},
 241         {"allocate",                    tALLOCATE},
 242         {"appobject",                   tAPPOBJECT},
 243         {"async",                       tASYNC},
 244         {"async_uuid",                  tASYNCUUID},
 245         {"auto_handle",                 tAUTOHANDLE},
 246         {"bindable",                    tBINDABLE},
 247         {"broadcast",                   tBROADCAST},
 248         {"byte_count",                  tBYTECOUNT},
 249         {"call_as",                     tCALLAS},
 250         {"context_handle",              tCONTEXTHANDLE},
 251         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 252         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 253         {"control",                     tCONTROL},
 254         {"defaultcollelem",             tDEFAULTCOLLELEM},
 255         {"defaultvalue",                tDEFAULTVALUE},
 256         {"defaultvtable",               tDEFAULTVTABLE},
 257         {"displaybind",                 tDISPLAYBIND},
 258         {"dllname",                     tDLLNAME},
 259         {"dual",                        tDUAL},
 260         {"endpoint",                    tENDPOINT},
 261         {"entry",                       tENTRY},
 262         {"explicit_handle",             tEXPLICITHANDLE},
 263         {"handle",                      tHANDLE},
 264         {"helpcontext",                 tHELPCONTEXT},
 265         {"helpfile",                    tHELPFILE},
 266         {"helpstring",                  tHELPSTRING},
 267         {"helpstringcontext",           tHELPSTRINGCONTEXT},
 268         {"helpstringdll",               tHELPSTRINGDLL},
 269         {"hidden",                      tHIDDEN},
 270         {"id",                          tID},
 271         {"idempotent",                  tIDEMPOTENT},
 272         {"iid_is",                      tIIDIS},
 273         {"immediatebind",               tIMMEDIATEBIND},
 274         {"implicit_handle",             tIMPLICITHANDLE},
 275         {"in",                          tIN},
 276         {"input_sync",                  tINPUTSYNC},
 277         {"lcid",                        tLCID},
 278         {"length_is",                   tLENGTHIS},
 279         {"local",                       tLOCAL},
 280         {"nonbrowsable",                tNONBROWSABLE},
 281         {"noncreatable",                tNONCREATABLE},
 282         {"nonextensible",               tNONEXTENSIBLE},
 283         {"object",                      tOBJECT},
 284         {"odl",                         tODL},
 285         {"oleautomation",               tOLEAUTOMATION},
 286         {"optional",                    tOPTIONAL},
 287         {"out",                         tOUT},
 288         {"pointer_default",             tPOINTERDEFAULT},
 289         {"propget",                     tPROPGET},
 290         {"propput",                     tPROPPUT},
 291         {"propputref",                  tPROPPUTREF},
 292         {"ptr",                         tPTR},
 293         {"public",                      tPUBLIC},
 294         {"range",                       tRANGE},
 295         {"readonly",                    tREADONLY},
 296         {"ref",                         tREF},
 297         {"requestedit",                 tREQUESTEDIT},
 298         {"restricted",                  tRESTRICTED},
 299         {"retval",                      tRETVAL},
 300         {"single",                      tSINGLE},
 301         {"size_is",                     tSIZEIS},
 302         {"source",                      tSOURCE},
 303         {"strict_context_handle",       tSTRICTCONTEXTHANDLE},
 304         {"string",                      tSTRING},
 305         {"switch_is",                   tSWITCHIS},
 306         {"switch_type",                 tSWITCHTYPE},
 307         {"transmit_as",                 tTRANSMITAS},
 308         {"unique",                      tUNIQUE},
 309         {"uuid",                        tUUID},
 310         {"v1_enum",                     tV1ENUM},
 311         {"vararg",                      tVARARG},
 312         {"version",                     tVERSION},
 313         {"wire_marshal",                tWIREMARSHAL},
 314 };
 315
 316
 317 #define KWP(p) ((const struct keyword *)(p))
 318
 319 static int kw_cmp_func(const void *s1, const void *s2)
 320 {
 321         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 322 }
 323
 324 static int kw_token(const char *kw)
 325 {
 326         struct keyword key, *kwp;
 327         key.kw = kw;
 328         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 329         if (kwp) {
 330                 parser_lval.str = xstrdup(kwp->kw);
 331                 return kwp->token;
 332         }
 333         parser_lval.str = xstrdup(kw);
 334         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 335 }
 336
 337 static int attr_token(const char *kw)
 338 {
 339         struct keyword key, *kwp;
 340         key.kw = kw;
 341         kwp = bsearch(&key, attr_keywords, sizeof(attr_keywords)/sizeof(attr_keywords[0]),
 342                       sizeof(attr_keywords[0]), kw_cmp_func);
 343         if (kwp) {
 344             parser_lval.str = xstrdup(kwp->kw);
 345             return kwp->token;
 346         }
 347         return kw_token(kw);
 348 }
 349
 350 static void addcchar(char c)
 351 {
 352         if(cbufidx >= cbufalloc)
 353         {
 354                 cbufalloc += 1024;
 355                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 356                 if(cbufalloc > 65536)
 357                         parser_warning("Reallocating string buffer larger than 64kB\n");
 358         }
 359         cbuffer[cbufidx++] = c;
 360 }
 361
 362 static char *get_buffered_cstring(void)
 363 {
 364         addcchar(0);
 365         return xstrdup(cbuffer);
 366 }
 367
 368 static void pop_import(void)
 369 {
 370         int ptr = import_stack_ptr-1;
 371
 372         fclose(yyin);
 373         yy_delete_buffer( YY_CURRENT_BUFFER );
 374         yy_switch_to_buffer( import_stack[ptr].state );
 375         if (temp_name) {
 376                 unlink(temp_name);
 377                 free(temp_name);
 378         }
 379         temp_name = import_stack[ptr].temp_name;
 380         free( input_name );
 381         input_name = import_stack[ptr].input_name;
 382         line_number = import_stack[ptr].line_number;
 383         import_stack_ptr--;
 384 }
 385
 386 struct imports {
 387         char *name;
 388         struct imports *next;
 389 } *first_import;
 390
 391 int do_import(char *fname)
 392 {
 393         FILE *f;
 394         char *hname, *path, *p;
 395         struct imports *import;
 396         int ptr = import_stack_ptr;
 397         int ret;
 398
 399         if (!parse_only && do_header) {
 400                 hname = dup_basename(fname, ".idl");
 401                 p = hname + strlen(hname) - 2;
 402                 if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
 403
 404                 fprintf(header, "#include <%s>\n", hname);
 405                 free(hname);
 406         }
 407
 408         import = first_import;
 409         while (import && strcmp(import->name, fname))
 410                 import = import->next;
 411         if (import) return 0; /* already imported */
 412
 413         import = xmalloc(sizeof(struct imports));
 414         import->name = xstrdup(fname);
 415         import->next = first_import;
 416         first_import = import;
 417
 418         /* don't search for a file name with a path in the include directories,
 419          * for compatibility with MIDL */
 420         if (strchr( fname, '/' ) || strchr( fname, '\\' ))
 421             path = strdup( fname );
 422         else if (!(path = wpp_find_include( fname, input_name )))
 423             error_loc("Unable to open include file %s\n", 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                 error_loc("Unable to open %s\n", 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 }