tools/widl/parser.l

   1 /*
   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 never-interactive
  23
  24 nl      \r?\n
  25 ws      [ \f\t\r]
  26 cident  [a-zA-Z_][0-9a-zA-Z_]*
  27 int     [0-9]+
  28 hexd    [0-9a-fA-F]
  29 hex     0x{hexd}+
  30 uuid    {hexd}{8}-{hexd}{4}-{hexd}{4}-{hexd}{4}-{hexd}{12}
  31
  32 %x QUOTE
  33 %x pp_line
  34
  35 %{
  36
  37 #include "config.h"
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <ctype.h>
  43 #include <assert.h>
  44 #ifdef HAVE_UNISTD_H
  45 # include <unistd.h>
  46 #endif
  47
  48 #include "widl.h"
  49 #include "utils.h"
  50 #include "parser.h"
  51 #include "wine/wpp.h"
  52
  53 #include "y.tab.h"
  54
  55 #define YY_USE_PROTOS
  56 #define YY_NO_UNPUT
  57 #define YY_NO_TOP_STATE
  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
  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 static 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>^{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                                 yyerror("Malformed '#...' line-directive; invalid linenumber");
 117                             fname = strchr(cptr, '"');
 118                             if(!fname)
 119                                 yyerror("Malformed '#...' line-directive; missing filename");
 120                             fname++;
 121                             cptr = strchr(fname, '"');
 122                             if(!cptr)
 123                                 yyerror("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 \"                      yy_push_state(QUOTE); cbufidx = 0;
 130 <QUOTE>\"               {
 131                                 yy_pop_state();
 132                                 yylval.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 {uuid}                  {
 140                                 yylval.uuid = parse_uuid(yytext);
 141                                 return aUUID;
 142                         }
 143 {hex}                   {
 144                                 yylval.num = strtoul(yytext, NULL, 0);
 145                                 return aHEXNUM;
 146                         }
 147 {int}                   {
 148                                 yylval.num = strtoul(yytext, NULL, 0);
 149                                 return aNUM;
 150                         }
 151 {cident}                return kw_token(yytext);
 152 \n                      line_number++;
 153 {ws}
 154 \<\<                    return SHL;
 155 \>\>                    return SHR;
 156 .                       return yytext[0];
 157 <<EOF>>                 {
 158                                 if (import_stack_ptr) {
 159                                         pop_import();
 160                                         return aEOF;
 161                                 }
 162                                 else yyterminate();
 163                         }
 164 %%
 165
 166 #ifndef yywrap
 167 int yywrap(void)
 168 {
 169         return 1;
 170 }
 171 #endif
 172
 173 static struct keyword {
 174         const char *kw;
 175         int token;
 176         int val;
 177 } keywords[] = {
 178         {"__cdecl",                     tCDECL},
 179         {"__int64",                     tINT64},
 180         {"__stdcall",                   tSTDCALL},
 181         {"_stdcall",                    tSTDCALL},
 182         {"aggregatable",                tAGGREGATABLE},
 183         {"allocate",                    tALLOCATE},
 184         {"appobject",                   tAPPOBJECT},
 185         {"arrays",                      tARRAYS},
 186         {"async",                       tASYNC},
 187         {"async_uuid",                  tASYNCUUID},
 188         {"auto_handle",                 tAUTOHANDLE},
 189         {"bindable",                    tBINDABLE},
 190         {"boolean",                     tBOOLEAN},
 191         {"broadcast",                   tBROADCAST},
 192         {"byte",                        tBYTE},
 193         {"byte_count",                  tBYTECOUNT},
 194         {"call_as",                     tCALLAS},
 195         {"callback",                    tCALLBACK},
 196         {"case",                        tCASE},
 197         {"char",                        tCHAR},
 198         {"coclass",                     tCOCLASS},
 199         {"code",                        tCODE},
 200         {"comm_status",                 tCOMMSTATUS},
 201         {"const",                       tCONST},
 202         {"context_handle",              tCONTEXTHANDLE},
 203         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 204         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 205         {"control",                     tCONTROL},
 206         {"cpp_quote",                   tCPPQUOTE},
 207 /* ... */
 208         {"default",                     tDEFAULT},
 209 /* ... */
 210         {"dispinterface",               tDISPINTERFACE},
 211 /* ... */
 212         {"dllname",                     tDLLNAME},
 213         {"double",                      tDOUBLE},
 214         {"dual",                        tDUAL},
 215 /* ... */
 216         {"entry",                       tENTRY},
 217         {"enum",                        tENUM},
 218         {"error_status_t",              tERRORSTATUST},
 219 /* ... */
 220         {"extern",                      tEXTERN},
 221 /* ... */
 222         {"float",                       tFLOAT},
 223 /* ... */
 224         {"handle_t",                    tHANDLET},
 225 /* ... */
 226         {"helpstring",                  tHELPSTRING},
 227 /* ... */
 228         {"hyper",                       tHYPER},
 229         {"id",                          tID},
 230         {"idempotent",                  tIDEMPOTENT},
 231 /* ... */
 232         {"iid_is",                      tIIDIS},
 233 /* ... */
 234         {"import",                      tIMPORT},
 235         {"importlib",                   tIMPORTLIB},
 236         {"in",                          tIN},
 237         {"include",                     tINCLUDE},
 238         {"in_line",                     tINLINE},
 239         {"int",                         tINT},
 240 /* ... */
 241         {"interface",                   tINTERFACE},
 242 /* ... */
 243         {"length_is",                   tLENGTHIS},
 244         {"library",                     tLIBRARY},
 245 /* ... */
 246         {"local",                       tLOCAL},
 247         {"long",                        tLONG},
 248 /* ... */
 249         {"methods",                     tMETHODS},
 250 /* ... */
 251         {"module",                      tMODULE},
 252 /* ... */
 253         {"object",                      tOBJECT},
 254         {"odl",                         tODL},
 255         {"oleautomation",               tOLEAUTOMATION},
 256 /* ... */
 257         {"out",                         tOUT},
 258 /* ... */
 259         {"pointer_default",             tPOINTERDEFAULT},
 260 /* ... */
 261         {"properties",                  tPROPERTIES},
 262 /* ... */
 263         {"public",                      tPUBLIC},
 264 /* ... */
 265         {"readonly",                    tREADONLY},
 266         {"ref",                         tREF},
 267 /* ... */
 268         {"retval",                      tRETVAL},
 269 /* ... */
 270         {"short",                       tSHORT},
 271         {"signed",                      tSIGNED},
 272         {"size_is",                     tSIZEIS},
 273         {"sizeof",                      tSIZEOF},
 274 /* ... */
 275         {"source",                      tSOURCE},
 276 /* ... */
 277         {"string",                      tSTRING},
 278         {"struct",                      tSTRUCT},
 279         {"switch",                      tSWITCH},
 280         {"switch_is",                   tSWITCHIS},
 281         {"switch_type",                 tSWITCHTYPE},
 282 /* ... */
 283         {"typedef",                     tTYPEDEF},
 284         {"union",                       tUNION},
 285 /* ... */
 286         {"unique",                      tUNIQUE},
 287         {"unsigned",                    tUNSIGNED},
 288 /* ... */
 289         {"uuid",                        tUUID},
 290         {"v1_enum",                     tV1ENUM},
 291 /* ... */
 292         {"version",                     tVERSION},
 293         {"void",                        tVOID},
 294         {"wchar_t",                     tWCHAR},
 295         {"wire_marshal",                tWIREMARSHAL}
 296 };
 297 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 298 #define KWP(p) ((struct keyword *)(p))
 299
 300 static int kw_cmp_func(const void *s1, const void *s2)
 301 {
 302         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 303 }
 304
 305 #define KW_BSEARCH
 306 static int kw_token(const char *kw)
 307 {
 308         struct keyword key, *kwp;
 309         key.kw = kw;
 310 #ifdef KW_BSEARCH
 311         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 312 #else
 313         {
 314                 int i;
 315                 for (kwp=NULL, i=0; i < NKEYWORDS; i++)
 316                         if (!kw_cmp_func(&key, &keywords[i])) {
 317                                 kwp = &keywords[i];
 318                                 break;
 319                         }
 320         }
 321 #endif
 322         if (kwp) {
 323                 yylval.str = (char*)kwp->kw;
 324                 return kwp->token;
 325         }
 326         yylval.str = xstrdup(kw);
 327         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 328 }
 329
 330 static void addcchar(char c)
 331 {
 332         if(cbufidx >= cbufalloc)
 333         {
 334                 cbufalloc += 1024;
 335                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 336                 if(cbufalloc > 65536)
 337                         yywarning("Reallocating string buffer larger than 64kB");
 338         }
 339         cbuffer[cbufidx++] = c;
 340 }
 341
 342 static char *get_buffered_cstring(void)
 343 {
 344         addcchar(0);
 345         return xstrdup(cbuffer);
 346 }
 347
 348 static void pop_import(void)
 349 {
 350         int ptr = import_stack_ptr-1;
 351
 352         fclose(yyin);
 353         yy_delete_buffer( YY_CURRENT_BUFFER );
 354         yy_switch_to_buffer( import_stack[ptr].state );
 355         if (temp_name) {
 356                 unlink(temp_name);
 357                 free(temp_name);
 358         }
 359         temp_name = import_stack[ptr].temp_name;
 360         free( input_name );
 361         input_name = import_stack[ptr].input_name;
 362         line_number = import_stack[ptr].line_number;
 363         import_stack_ptr--;
 364 }
 365
 366 struct imports {
 367         char *name;
 368         struct imports *next;
 369 } *first_import;
 370
 371 int do_import(char *fname)
 372 {
 373         FILE *f;
 374         char *hname, *path, *p;
 375         struct imports *import;
 376         int ptr = import_stack_ptr;
 377         int ret;
 378
 379         if (!parse_only) {
 380                 hname = dup_basename(fname, ".idl");
 381                 p = hname + strlen(hname) - 2;
 382                 if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
 383
 384                 fprintf(header, "#include <%s>\n", hname);
 385                 free(hname);
 386         }
 387
 388         import = first_import;
 389         while (import && strcmp(import->name, fname))
 390                 import = import->next;
 391         if (import) return 0; /* already imported */
 392
 393         import = xmalloc(sizeof(struct imports));
 394         import->name = xstrdup(fname);
 395         import->next = first_import;
 396         first_import = import;
 397
 398         if (!(path = wpp_find_include( fname, 1 )))
 399             yyerror("Unable to open include file %s", fname);
 400
 401         import_stack[ptr].temp_name = temp_name;
 402         import_stack[ptr].input_name = input_name;
 403         import_stack[ptr].line_number = line_number;
 404         import_stack_ptr++;
 405         input_name = path;
 406         line_number = 1;
 407
 408         ret = wpp_parse_temp( path, NULL, &temp_name );
 409         if (ret) exit(1);
 410
 411         if((f = fopen(temp_name, "r")) == NULL)
 412                 yyerror("Unable to open %s", temp_name);
 413
 414         import_stack[ptr].state = YY_CURRENT_BUFFER;
 415         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 416         return 1;
 417 }
 418
 419 void abort_import(void)
 420 {
 421         int ptr;
 422
 423         for (ptr=0; ptr<import_stack_ptr; ptr++)
 424                 unlink(import_stack[ptr].temp_name);
 425 }