gcc/gengtype-lex.l

   1 /* -*- indented-text -*- */
   2 /* Process source files and output type information.
   3    Copyright (C) 2002 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 %{
  23 #define malloc xmalloc
  24 #define realloc xrealloc
  25
  26 #include "hconfig.h"
  27 #include "system.h"
  28 #include "gengtype.h"
  29 #include "gengtype-yacc.h"
  30
  31 static void update_lineno PARAMS ((const char *l, size_t len));
  32
  33 struct fileloc lexer_line;
  34 int lexer_toplevel_done;
  35
  36 static void
  37 update_lineno (l, len)
  38      const char *l;
  39      size_t len;
  40 {
  41   while (len-- > 0)
  42     if (*l++ == '\n')
  43       lexer_line.line++;
  44 }
  45
  46 %}
  47
  48 ID      [[:alpha:]][[:alnum:]_]*
  49 WS      [[:space:]]+
  50 IWORD   short|long|(un)?signed|char|int|HOST_WIDE_INT|bool|size_t
  51 ITYPE   {IWORD}({WS}{IWORD})*
  52
  53 %x in_struct in_struct_comment in_comment in_yacc_escape
  54 %option warn noyywrap nounput nodefault perf-report
  55 %option 8bit never-interactive
  56 %%
  57
  58 [^[:alnum:]_]typedef{WS}(struct|union){WS}{ID}{WS}?[*[:space:]]{WS}?{ID}{WS}?";" {
  59   char *tagstart;
  60   size_t taglen;
  61   char *namestart;
  62   size_t namelen;
  63   int is_pointer = 0;
  64   struct type *t;
  65   int union_p;
  66
  67   tagstart = yytext + strlen (" typedef ");
  68   while (ISSPACE (*tagstart))
  69     tagstart++;
  70   union_p = tagstart[0] == 'u';
  71   tagstart += strlen ("union ");
  72   while (ISSPACE (*tagstart))
  73     tagstart++;
  74   for (taglen = 1; ISIDNUM (tagstart[taglen]); taglen++)
  75     ;
  76   for (namestart = tagstart + taglen;
  77        ! ISIDNUM (*namestart);
  78        namestart++)
  79     if (*namestart == '*')
  80       is_pointer = 1;
  81   for (namelen = 1; ISIDNUM (namestart[namelen]); namelen++)
  82     ;
  83   t = find_structure (xmemdup (tagstart, taglen, taglen+1), union_p);
  84   if (is_pointer)
  85     t = create_pointer (t);
  86   do_typedef (xmemdup (namestart, namelen, namelen+1), t, &lexer_line);
  87   update_lineno (yytext, yyleng);
  88 }
  89
  90 [^[:alnum:]_]typedef{WS}{ITYPE}{WS}{ID}{WS}?";" {
  91
  92   char *namestart;
  93   size_t namelen;
  94   struct type *t;
  95   char *typestart;
  96   size_t typelen;
  97
  98   for (namestart = yytext + yyleng - 2; ISSPACE (*namestart); namestart--)
  99     ;
 100   for (namelen = 1; !ISSPACE (namestart[-namelen]); namelen++)
 101     ;
 102   namestart -= namelen - 1;
 103   for (typestart = yytext + strlen (" typedef ");
 104        ISSPACE(*typestart);
 105        typestart++)
 106     ;
 107   for (typelen = namestart - typestart;
 108        ISSPACE(typestart[typelen-1]);
 109        typelen--)
 110     ;
 111
 112   t = create_scalar_type (typestart, typelen);
 113   do_typedef (xmemdup (namestart, namelen, namelen+1), t, &lexer_line);
 114   update_lineno (yytext, yyleng);
 115 }
 116
 117 [^[:alnum:]_]typedef{WS}{ID}{WS}{ID}{WS}PARAMS {
 118   char *namestart;
 119   size_t namelen;
 120   struct type *t;
 121
 122   for (namestart = yytext + yyleng - 7; ISSPACE (*namestart); namestart--)
 123     ;
 124   for (namelen = 1; !ISSPACE (namestart[-namelen]); namelen++)
 125     ;
 126   namestart -= namelen - 1;
 127
 128   t = create_scalar_type ("function type", sizeof ("function type")-1);
 129   do_typedef (xmemdup (namestart, namelen, namelen+1), t, &lexer_line);
 130   update_lineno (yytext, yyleng);
 131 }
 132 [^[:alnum:]_]typedef{WS}{ID}{WS}?"("{WS}?"*"{WS}?{ID}{WS}?")"{WS}?PARAMS {
 133   char *namestart;
 134   size_t namelen;
 135   struct type *t;
 136
 137   for (namestart = yytext + yyleng - 7; !ISIDNUM (*namestart); namestart--)
 138     ;
 139   for (namelen = 1; ISIDNUM (namestart[-namelen]); namelen++)
 140     ;
 141   namestart -= namelen - 1;
 142
 143   t = create_scalar_type ("function type", sizeof ("function type")-1);
 144   do_typedef (xmemdup (namestart, namelen, namelen+1), t, &lexer_line);
 145   update_lineno (yytext, yyleng);
 146 }
 147
 148 [^[:alnum:]_](typedef{WS})?(struct|union){WS}{ID}{WS}/"GTY" {
 149   char *tagstart;
 150   size_t taglen;
 151   int typedef_p;
 152   int union_p;
 153
 154   typedef_p = yytext[1] == 't';
 155   if (typedef_p)
 156     for (tagstart = yytext + strlen (" typedef ");
 157          ISSPACE(*tagstart);
 158          tagstart++)
 159       ;
 160   else
 161     tagstart = yytext + 1;
 162
 163   union_p = tagstart[0] == 'u';
 164   tagstart += strlen ("union ");
 165   while (ISSPACE (*tagstart))
 166     tagstart++;
 167   for (taglen = 1; ISIDNUM (tagstart[taglen]); taglen++)
 168     ;
 169
 170   yylval.t = find_structure (xmemdup (tagstart, taglen, taglen + 1), union_p);
 171   BEGIN(in_struct);
 172   update_lineno (yytext, yyleng);
 173   return typedef_p ? ENT_TYPEDEF_STRUCT : ENT_STRUCT;
 174 }
 175
 176 [^[:alnum:]_](extern|static){WS}/"GTY" {
 177   BEGIN(in_struct);
 178   update_lineno (yytext, yyleng);
 179   return ENT_EXTERNSTATIC;
 180 }
 181
 182 ^"%union"{WS}"{"{WS}/"GTY" {
 183   BEGIN(in_struct);
 184   update_lineno (yytext, yyleng);
 185   return ENT_YACCUNION;
 186 }
 187
 188 <in_struct>{
 189
 190 "/*"                            { BEGIN(in_struct_comment); }
 191
 192 ^"%{"                           { BEGIN(in_yacc_escape); }
 193
 194 {WS}                            { update_lineno (yytext, yyleng); }
 195
 196 "const"/[^[:alnum:]_]           /* don't care */
 197
 198 "GTY"/[^[:alnum:]_]             { return GTY_TOKEN; }
 199 "union"/[^[:alnum:]_]           { return UNION; }
 200 "struct"/[^[:alnum:]_]          { return STRUCT; }
 201 "enum"/[^[:alnum:]_]            { return ENUM; }
 202 "ptr_alias"/[^[:alnum:]_]       { return ALIAS; }
 203 "param_is"/[^[:alnum:]_]        { return PARAM_IS; }
 204 [0-9]+                          { return NUM; }
 205
 206 {IWORD}({WS}{IWORD})*/[^[:alnum:]_]             |
 207 "ENUM_BITFIELD"{WS}?"("{WS}?{ID}{WS}?")"        {
 208   size_t len;
 209
 210   for (len = yyleng; ISSPACE (yytext[len-1]); len--)
 211     ;
 212
 213   yylval.t = create_scalar_type (yytext, len);
 214   update_lineno (yytext, yyleng);
 215   return SCALAR;
 216 }
 217
 218 {ID}/[^[:alnum:]_]              {
 219   yylval.s = xmemdup (yytext, yyleng, yyleng+1);
 220   return ID;
 221 }
 222
 223 \"([^"\\]|\\.)*\"               {
 224   yylval.s = xmemdup (yytext+1, yyleng-2, yyleng-1);
 225   return STRING;
 226 }
 227 "["[^\[\]]*"]"                  {
 228   yylval.s = xmemdup (yytext+1, yyleng-2, yyleng-1);
 229   return ARRAY;
 230 }
 231 ^"%"{ID}                        {
 232   yylval.s = xmemdup (yytext+1, yyleng-1, yyleng);
 233   return PERCENT_ID;
 234 }
 235 "'"("\\".|[^\\])"'"             {
 236   yylval.s = xmemdup (yytext+1, yyleng-2, yyleng);
 237   return CHAR;
 238 }
 239
 240 [(){},*:<>]                     { return yytext[0]; }
 241
 242 [;=]                            {
 243   if (lexer_toplevel_done)
 244     {
 245       BEGIN(INITIAL);
 246       lexer_toplevel_done = 0;
 247     }
 248   return yytext[0];
 249 }
 250
 251 ^"%%"                           {
 252   BEGIN(INITIAL);
 253   return PERCENTPERCENT;
 254 }
 255
 256 .                               {
 257   error_at_line (&lexer_line, "unexpected character `%s'", yytext);
 258 }
 259 }
 260
 261 "/*"                    { BEGIN(in_comment); }
 262 \n                      { lexer_line.line++; }
 263 {ID}                    |
 264 "'"("\\".|[^\\])"'"     |
 265 [^"/\n]                 /* do nothing */
 266 \"([^"\\]|\\.|\\\n)*\"  { update_lineno (yytext, yyleng); }
 267 "/"/[^*]                /* do nothing */
 268
 269 <in_comment,in_struct_comment>{
 270 \n              { lexer_line.line++; }
 271 [^*\n]{16}      |
 272 [^*\n]          /* do nothing */
 273 "*"/[^/]        /* do nothing */
 274 }
 275 <in_comment>"*/"        { BEGIN(INITIAL); }
 276 <in_struct_comment>"*/" { BEGIN(in_struct); }
 277
 278 <in_yacc_escape>{
 279 \n              { lexer_line.line++; }
 280 [^%]{16}        |
 281 [^%]            /* do nothing */
 282 "%"/[^}]        /* do nothing */
 283 "%}"            { BEGIN(in_struct); }
 284 "%"             {
 285   error_at_line (&lexer_line,
 286                  "unterminated %{; unexpected EOF");
 287 }
 288 }
 289
 290
 291 ["/]                    |
 292 <in_struct_comment,in_comment>"*"       {
 293   error_at_line (&lexer_line,
 294                  "unterminated comment or string; unexpected EOF");
 295 }
 296
 297 %%
 298
 299 void
 300 yyerror (s)
 301      const char *s;
 302 {
 303   error_at_line (&lexer_line, s);
 304 }
 305
 306 void
 307 parse_file (fname)
 308       char *fname;
 309 {
 310   yyin = fopen (fname, "r");
 311   lexer_line.file = fname;
 312   lexer_line.line = 1;
 313   if (yyin == NULL)
 314     {
 315       perror (fname);
 316       exit (1);
 317     }
 318   if (yyparse() != 0)
 319     exit (1);
 320   fclose (yyin);
 321 }