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
  34 %{
  35
  36 #include "config.h"
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <ctype.h>
  42 #include <assert.h>
  43 #ifdef HAVE_UNISTD_H
  44 # include <unistd.h>
  45 #endif
  46
  47 #include "widl.h"
  48 #include "utils.h"
  49 #include "parser.h"
  50 #include "../wpp/wpp.h"
  51
  52 #include "y.tab.h"
  53
  54 #define YY_USE_PROTOS
  55 #define YY_NO_UNPUT
  56 #define YY_NO_TOP_STATE
  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
  69 #define MAX_IMPORT_DEPTH 10
  70 struct {
  71   YY_BUFFER_STATE state;
  72   char *temp_name;
  73 } import_stack[MAX_IMPORT_DEPTH];
  74 int import_stack_ptr = 0;
  75
  76 static void pop_import(void);
  77
  78 static UUID* parse_uuid(const char*u)
  79 {
  80   UUID* uuid = xmalloc(sizeof(UUID));
  81   char b[3];
  82   /* it would be nice to use UuidFromStringA */
  83   uuid->Data1 = strtoul(u, NULL, 16);
  84   uuid->Data2 = strtoul(u+9, NULL, 16);
  85   uuid->Data3 = strtoul(u+14, NULL, 16);
  86   b[2] = 0;
  87   memcpy(b, u+19, 2); uuid->Data4[0] = strtoul(b, NULL, 16);
  88   memcpy(b, u+21, 2); uuid->Data4[1] = strtoul(b, NULL, 16);
  89   memcpy(b, u+24, 2); uuid->Data4[2] = strtoul(b, NULL, 16);
  90   memcpy(b, u+26, 2); uuid->Data4[3] = strtoul(b, NULL, 16);
  91   memcpy(b, u+28, 2); uuid->Data4[4] = strtoul(b, NULL, 16);
  92   memcpy(b, u+30, 2); uuid->Data4[5] = strtoul(b, NULL, 16);
  93   memcpy(b, u+32, 2); uuid->Data4[6] = strtoul(b, NULL, 16);
  94   memcpy(b, u+34, 2); uuid->Data4[7] = strtoul(b, NULL, 16);
  95   return uuid;
  96 }
  97
  98 %}
  99
 100 /*
 101  **************************************************************************
 102  * The flexer starts here
 103  **************************************************************************
 104  */
 105 %%
 106 ^#.*
 107 \"                      yy_push_state(QUOTE); cbufidx = 0;
 108 <QUOTE>\"               {
 109                                 yy_pop_state();
 110                                 yylval.str = get_buffered_cstring();
 111                                 return aSTRING;
 112                         }
 113 <QUOTE>\\\\             |
 114 <QUOTE>\\\"             addcchar(yytext[1]);
 115 <QUOTE>\\.              addcchar('\\'); addcchar(yytext[1]);
 116 <QUOTE>.                addcchar(yytext[0]);
 117 {uuid}                  {
 118                                 yylval.uuid = parse_uuid(yytext);
 119                                 return aUUID;
 120                         }
 121 {hex}                   {
 122                                 yylval.num = strtol(yytext, NULL, 0);
 123                                 return aHEXNUM;
 124                         }
 125 {int}                   {
 126                                 yylval.num = strtol(yytext, NULL, 0);
 127                                 return aNUM;
 128                         }
 129 {cident}                return kw_token(yytext);
 130 \n
 131 {ws}
 132 \<\<                    return SHL;
 133 \>\>                    return SHR;
 134 .                       return yytext[0];
 135 <<EOF>>                 {
 136                                 if (import_stack_ptr) {
 137                                         pop_import();
 138                                         return aEOF;
 139                                 }
 140                                 else yyterminate();
 141                         }
 142 %%
 143
 144 #ifndef yywrap
 145 int yywrap(void)
 146 {
 147         return 1;
 148 }
 149 #endif
 150
 151 static struct keyword {
 152         const char *kw;
 153         int token;
 154         int val;
 155 } keywords[] = {
 156         {"__cdecl",                     tCDECL},
 157         {"__int64",                     tINT64},
 158         {"__stdcall",                   tSTDCALL},
 159         {"_stdcall",                    tSTDCALL},
 160         {"aggregatable",                tAGGREGATABLE},
 161         {"allocate",                    tALLOCATE},
 162         {"appobject",                   tAPPOBJECT},
 163         {"arrays",                      tARRAYS},
 164         {"async",                       tASYNC},
 165         {"async_uuid",                  tASYNCUUID},
 166         {"auto_handle",                 tAUTOHANDLE},
 167         {"bindable",                    tBINDABLE},
 168         {"boolean",                     tBOOLEAN},
 169         {"broadcast",                   tBROADCAST},
 170         {"byte",                        tBYTE},
 171         {"byte_count",                  tBYTECOUNT},
 172         {"call_as",                     tCALLAS},
 173         {"callback",                    tCALLBACK},
 174         {"case",                        tCASE},
 175         {"char",                        tCHAR},
 176         {"coclass",                     tCOCLASS},
 177         {"code",                        tCODE},
 178         {"comm_status",                 tCOMMSTATUS},
 179         {"const",                       tCONST},
 180         {"context_handle",              tCONTEXTHANDLE},
 181         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 182         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 183         {"control",                     tCONTROL},
 184         {"cpp_quote",                   tCPPQUOTE},
 185 /* ... */
 186         {"default",                     tDEFAULT},
 187 /* ... */
 188         {"double",                      tDOUBLE},
 189 /* ... */
 190         {"enum",                        tENUM},
 191         {"error_status_t",              tERRORSTATUST},
 192 /* ... */
 193         {"extern",                      tEXTERN},
 194 /* ... */
 195         {"float",                       tFLOAT},
 196 /* ... */
 197         {"handle_t",                    tHANDLET},
 198 /* ... */
 199         {"hyper",                       tHYPER},
 200 /* ... */
 201         {"idempotent",                  tIDEMPOTENT},
 202 /* ... */
 203         {"iid_is",                      tIIDIS},
 204 /* ... */
 205         {"import",                      tIMPORT},
 206         {"importlib",                   tIMPORTLIB},
 207         {"in",                          tIN},
 208         {"include",                     tINCLUDE},
 209         {"in_line",                     tINLINE},
 210         {"int",                         tINT},
 211 /* ... */
 212         {"interface",                   tINTERFACE},
 213 /* ... */
 214         {"length_is",                   tLENGTHIS},
 215 /* ... */
 216         {"local",                       tLOCAL},
 217         {"long",                        tLONG},
 218 /* ... */
 219         {"object",                      tOBJECT},
 220         {"odl",                         tODL},
 221         {"oleautomation",               tOLEAUTOMATION},
 222 /* ... */
 223         {"out",                         tOUT},
 224 /* ... */
 225         {"pointer_default",             tPOINTERDEFAULT},
 226 /* ... */
 227         {"ref",                         tREF},
 228 /* ... */
 229         {"short",                       tSHORT},
 230         {"signed",                      tSIGNED},
 231         {"size_is",                     tSIZEIS},
 232         {"sizeof",                      tSIZEOF},
 233 /* ... */
 234         {"string",                      tSTRING},
 235         {"struct",                      tSTRUCT},
 236         {"switch",                      tSWITCH},
 237         {"switch_is",                   tSWITCHIS},
 238         {"switch_type",                 tSWITCHTYPE},
 239 /* ... */
 240         {"typedef",                     tTYPEDEF},
 241         {"union",                       tUNION},
 242 /* ... */
 243         {"unique",                      tUNIQUE},
 244         {"unsigned",                    tUNSIGNED},
 245 /* ... */
 246         {"uuid",                        tUUID},
 247         {"v1_enum",                     tV1ENUM},
 248 /* ... */
 249         {"version",                     tVERSION},
 250         {"void",                        tVOID},
 251         {"wchar_t",                     tWCHAR},
 252         {"wire_marshal",                tWIREMARSHAL}
 253 };
 254 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 255 #define KWP(p) ((struct keyword *)(p))
 256
 257 static int kw_cmp_func(const void *s1, const void *s2)
 258 {
 259         return strcmp(KWP(s1)->kw, KWP(s2)->kw);
 260 }
 261
 262 #define KW_BSEARCH
 263 static int kw_token(const char *kw)
 264 {
 265         struct keyword key, *kwp;
 266         key.kw = kw;
 267 #ifdef KW_BSEARCH
 268         kwp = bsearch(&key, keywords, NKEYWORDS, sizeof(keywords[0]), kw_cmp_func);
 269 #else
 270         {
 271                 int i;
 272                 for (kwp=NULL, i=0; i < NKEYWORDS; i++)
 273                         if (!kw_cmp_func(&key, &keywords[i])) {
 274                                 kwp = &keywords[i];
 275                                 break;
 276                         }
 277         }
 278 #endif
 279         if (kwp) {
 280                 yylval.str = (char*)kwp->kw;
 281                 return kwp->token;
 282         }
 283         yylval.str = xstrdup(kw);
 284         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 285 }
 286
 287 static void addcchar(char c)
 288 {
 289         if(cbufidx >= cbufalloc)
 290         {
 291                 cbufalloc += 1024;
 292                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 293                 if(cbufalloc > 65536)
 294                         yywarning("Reallocating string buffer larger than 64kB");
 295         }
 296         cbuffer[cbufidx++] = c;
 297 }
 298
 299 static char *get_buffered_cstring(void)
 300 {
 301         addcchar(0);
 302         return xstrdup(cbuffer);
 303 }
 304
 305 static void pop_import(void)
 306 {
 307         int ptr = import_stack_ptr-1;
 308
 309         fclose(yyin);
 310         yy_delete_buffer( YY_CURRENT_BUFFER );
 311         yy_switch_to_buffer( import_stack[ptr].state );
 312         if (temp_name) {
 313                 unlink(temp_name);
 314                 free(temp_name);
 315         }
 316         temp_name = import_stack[ptr].temp_name;
 317         import_stack_ptr--;
 318 }
 319
 320 struct imports {
 321         char *name;
 322         struct imports *next;
 323 } *first_import;
 324
 325 int do_import(char *fname)
 326 {
 327         FILE *f;
 328         char *hname, *path;
 329         struct imports *import;
 330         int ptr = import_stack_ptr;
 331         int ret;
 332
 333         if (!parse_only) {
 334                 hname = dup_basename(fname, ".idl");
 335                 strcat(hname, ".h");
 336
 337                 fprintf(header, "#include \"%s\"\n", hname);
 338                 free(hname);
 339         }
 340
 341         import = first_import;
 342         while (import && strcmp(import->name, fname))
 343                 import = import->next;
 344         if (import) return 0; /* already imported */
 345
 346         import = xmalloc(sizeof(struct imports));
 347         import->name = xstrdup(fname);
 348         import->next = first_import;
 349         first_import = import;
 350
 351         if (!(path = wpp_find_include( fname, 1 )))
 352             yyerror("Unable to open include file %s", fname);
 353
 354         import_stack[ptr].temp_name = temp_name;
 355         import_stack_ptr++;
 356
 357         ret = wpp_parse_temp( path, NULL, &temp_name );
 358         free( path );
 359         if (ret) exit(1);
 360
 361         if((f = fopen(temp_name, "r")) == NULL)
 362                 yyerror("Unable to open %s", temp_name);
 363
 364         import_stack[ptr].state = YY_CURRENT_BUFFER;
 365         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 366         return 1;
 367 }
 368
 369 void abort_import(void)
 370 {
 371         int ptr;
 372
 373         for (ptr=0; ptr<import_stack_ptr; ptr++)
 374                 unlink(import_stack[ptr].temp_name);
 375 }