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 <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <ctype.h>
  40 #include <assert.h>
  41 #include <unistd.h>
  42
  43 #include "widl.h"
  44 #include "utils.h"
  45 #include "parser.h"
  46 #include "../wpp/wpp.h"
  47
  48 #include "y.tab.h"
  49
  50 #define YY_USE_PROTOS
  51 #define YY_NO_UNPUT
  52 #define YY_NO_TOP_STATE
  53
  54 extern char *temp_name;
  55
  56 static void addcchar(char c);
  57 static char *get_buffered_cstring(void);
  58
  59 static char *cbuffer;
  60 static int cbufidx;
  61 static int cbufalloc = 0;
  62
  63 static int kw_token(const char *kw);
  64
  65 #define MAX_IMPORT_DEPTH 10
  66 struct {
  67   YY_BUFFER_STATE state;
  68   char *temp_name;
  69 } import_stack[MAX_IMPORT_DEPTH];
  70 int import_stack_ptr = 0;
  71
  72 static void pop_import(void);
  73
  74 %}
  75
  76 /*
  77  **************************************************************************
  78  * The flexer starts here
  79  **************************************************************************
  80  */
  81 %%
  82 ^#.*
  83 \"                      yy_push_state(QUOTE); cbufidx = 0;
  84 <QUOTE>\"               {
  85                                 yy_pop_state();
  86                                 yylval.str = get_buffered_cstring();
  87                                 return aSTRING;
  88                         }
  89 <QUOTE>\\\\             |
  90 <QUOTE>\\\"             addcchar(yytext[1]);
  91 <QUOTE>\\.              addcchar('\\'); addcchar(yytext[1]);
  92 <QUOTE>.                addcchar(yytext[0]);
  93 {uuid}                  return aUUID;
  94 {hex}                   return aNUM;
  95 {int}                   return aNUM;
  96 {cident}                return kw_token(yytext);
  97 \n
  98 {ws}
  99 \<\<                    return SHL;
 100 \>\>                    return SHR;
 101 .                       return yytext[0];
 102 <<EOF>>                 {
 103                                 if (import_stack_ptr) pop_import();
 104                                 else yyterminate();
 105                         }
 106 %%
 107
 108 #ifndef yywrap
 109 int yywrap(void)
 110 {
 111         return 1;
 112 }
 113 #endif
 114
 115 static struct {
 116         const char *kw;
 117         int token;
 118         int val;
 119 } keywords[] = {
 120         {"__cdecl",                     tCDECL},
 121         {"__int64",                     tINT64},
 122         {"__stdcall",                   tSTDCALL},
 123         {"_stdcall",                    tSTDCALL},
 124         {"aggregatable",                tAGGREGATABLE},
 125         {"allocate",                    tALLOCATE},
 126         {"appobject",                   tAPPOBJECT},
 127         {"arrays",                      tARRAYS},
 128         {"async",                       tASYNC},
 129         {"async_uuid",                  tASYNCUUID},
 130         {"auto_handle",                 tAUTOHANDLE},
 131         {"bindable",                    tBINDABLE},
 132         {"boolean",                     tBOOLEAN},
 133         {"broadcast",                   tBROADCAST},
 134         {"byte",                        tBYTE},
 135         {"byte_count",                  tBYTECOUNT},
 136         {"call_as",                     tCALLAS},
 137         {"callback",                    tCALLBACK},
 138         {"case",                        tCASE},
 139         {"char",                        tCHAR},
 140         {"coclass",                     tCOCLASS},
 141         {"code",                        tCODE},
 142         {"comm_status",                 tCOMMSTATUS},
 143         {"const",                       tCONST},
 144         {"context_handle",              tCONTEXTHANDLE},
 145         {"context_handle_noserialize",  tCONTEXTHANDLENOSERIALIZE},
 146         {"context_handle_serialize",    tCONTEXTHANDLENOSERIALIZE},
 147         {"control",                     tCONTROL},
 148         {"cpp_quote",                   tCPPQUOTE},
 149 /* ... */
 150         {"default",                     tDEFAULT},
 151 /* ... */
 152         {"double",                      tDOUBLE},
 153 /* ... */
 154         {"enum",                        tENUM},
 155 /* ... */
 156         {"extern",                      tEXTERN},
 157 /* ... */
 158         {"float",                       tFLOAT},
 159 /* ... */
 160         {"hyper",                       tHYPER},
 161 /* ... */
 162         {"iid_is",                      tIIDIS},
 163 /* ... */
 164         {"import",                      tIMPORT},
 165         {"importlib",                   tIMPORTLIB},
 166         {"in",                          tIN},
 167         {"include",                     tINCLUDE},
 168         {"in_line",                     tINLINE},
 169         {"int",                         tINT},
 170 /* ... */
 171         {"interface",                   tINTERFACE},
 172 /* ... */
 173         {"length_is",                   tLENGTHIS},
 174 /* ... */
 175         {"local",                       tLOCAL},
 176         {"long",                        tLONG},
 177 /* ... */
 178         {"object",                      tOBJECT},
 179         {"odl",                         tODL},
 180         {"oleautomation",               tOLEAUTOMATION},
 181 /* ... */
 182         {"out",                         tOUT},
 183 /* ... */
 184         {"pointer_default",             tPOINTERDEFAULT},
 185 /* ... */
 186         {"ref",                         tREF},
 187 /* ... */
 188         {"short",                       tSHORT},
 189         {"signed",                      tSIGNED},
 190         {"size_is",                     tSIZEIS},
 191         {"sizeof",                      tSIZEOF},
 192 /* ... */
 193         {"string",                      tSTRING},
 194         {"struct",                      tSTRUCT},
 195         {"switch",                      tSWITCH},
 196         {"switch_is",                   tSWITCHIS},
 197         {"switch_type",                 tSWITCHTYPE},
 198 /* ... */
 199         {"typedef",                     tTYPEDEF},
 200         {"union",                       tUNION},
 201 /* ... */
 202         {"unique",                      tUNIQUE},
 203         {"unsigned",                    tUNSIGNED},
 204 /* ... */
 205         {"uuid",                        tUUID},
 206         {"v1_enum",                     tV1ENUM},
 207 /* ... */
 208         {"version",                     tVERSION},
 209         {"void",                        tVOID},
 210         {"wchar_t",                     tWCHAR},
 211         {"wire_marshal",                tWIREMARSHAL},
 212         {NULL}
 213 };
 214
 215 static int kw_token(const char *kw)
 216 {
 217         int i;
 218         for (i=0; keywords[i].kw; i++)
 219                 if (strcmp(kw, keywords[i].kw) == 0)
 220                         return keywords[i].token;
 221         yylval.str = xstrdup(kw);
 222         return is_type(kw) ? aKNOWNTYPE : aIDENTIFIER;
 223 }
 224
 225 static void addcchar(char c)
 226 {
 227         if(cbufidx >= cbufalloc)
 228         {
 229                 cbufalloc += 1024;
 230                 cbuffer = xrealloc(cbuffer, cbufalloc * sizeof(cbuffer[0]));
 231                 if(cbufalloc > 65536)
 232                         yywarning("Reallocating string buffer larger than 64kB");
 233         }
 234         cbuffer[cbufidx++] = c;
 235 }
 236
 237 static char *get_buffered_cstring(void)
 238 {
 239         addcchar(0);
 240         return xstrdup(cbuffer);
 241 }
 242
 243 static void pop_import(void)
 244 {
 245         int ptr = import_stack_ptr-1;
 246
 247         fclose(yyin);
 248         yy_delete_buffer( YY_CURRENT_BUFFER );
 249         yy_switch_to_buffer( import_stack[ptr].state );
 250         if (temp_name) {
 251                 unlink(temp_name);
 252                 free(temp_name);
 253         }
 254         temp_name = import_stack[ptr].temp_name;
 255         import_stack_ptr--;
 256 }
 257
 258 struct imports {
 259         char *name;
 260         struct imports *next;
 261 } *first_import;
 262
 263 void do_import(char *fname)
 264 {
 265         FILE *f;
 266         char *hname, *path;
 267         struct imports *import;
 268         int ptr = import_stack_ptr;
 269         int ret;
 270
 271         if (!parse_only) {
 272                 hname = dup_basename(fname, ".idl");
 273                 strcat(hname, ".h");
 274
 275                 fprintf(header, "#include \"%s\"\n", hname);
 276                 free(hname);
 277         }
 278
 279         import = first_import;
 280         while (import && strcmp(import->name, fname))
 281                 import = import->next;
 282         if (import) return; /* already imported */
 283
 284         import = xmalloc(sizeof(struct imports));
 285         import->name = xstrdup(fname);
 286         import->next = first_import;
 287         first_import = import;
 288
 289         if (!(path = wpp_find_include( fname, 1 )))
 290             yyerror("Unable to open include file %s", fname);
 291
 292         import_stack[ptr].temp_name = temp_name;
 293         import_stack_ptr++;
 294
 295         ret = wpp_parse_temp( path, &temp_name );
 296         free( path );
 297         if (ret) exit(1);
 298
 299         if((f = fopen(temp_name, "r")) == NULL)
 300                 yyerror("Unable to open %s", temp_name);
 301
 302         import_stack[ptr].state = YY_CURRENT_BUFFER;
 303         yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
 304 }
 305
 306 void abort_import(void)
 307 {
 308         int ptr;
 309
 310         for (ptr=0; ptr<import_stack_ptr; ptr++)
 311                 unlink(import_stack[ptr].temp_name);
 312 }