ld/ldlex.l

   1 %{
   2
   3 /* Copyright (C) 1991 Free Software Foundation, Inc.
   4
   5 This file is part of GLD, the Gnu Linker.
   6
   7 GLD is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GLD is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GLD; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /*
  22 This was written by steve chamberlain
  23                     sac@cygnus.com
  24 */
  25
  26
  27 typedef int bfd_vma;
  28 #include <ansidecl.h>
  29 #include "ldgram.h"
  30
  31 int ldgram_in_defsym;
  32 int ldgram_had_equals;
  33 int ldgram_in_script;
  34
  35 int hex_mode;
  36 extern int fgetc();
  37 extern int yyparse();
  38
  39
  40
  41 char *buystring();
  42
  43 unsigned int lineno = 1;
  44 int old;
  45
  46 static comment();
  47
  48 #undef YY_INPUT
  49 #define YY_INPUT(buf,result,max_size) yy_input(buf, &result, max_size)
  50 #undef YY_FATAL_ERROR
  51 #define YY_FATAL_ERROR ;
  52 #define MAX_INCLUDE_DEPTH 10
  53 YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
  54 unsigned int include_stack_ptr = 0;
  55
  56
  57 /* STATES
  58         COMMAND         on command line
  59         COMMENT         in a C comment
  60         EXPRESSION      definiatelyt in an expression
  61         SCRIPT          definately in a script
  62         SOMEWHERE       either EXPRESSION or SCRIPT
  63         MRI             in an MRI script
  64 */
  65 #define RTOKEN(x)  {  yylval.token = x; return x; }
  66 %}
  67
  68 %a 4000
  69 %o 5000
  70
  71 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
  72 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
  73 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
  74 SYMBOLCHARN     [_a-zA-Z\/\.\\0-9]
  75 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
  76 FILENAME        {FILENAMECHAR}+
  77 WHITE           [ \t\n]+
  78
  79 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
  80
  81
  82 %s COMMAND
  83 %s SCRIPT
  84 %s EXPRESSION
  85 %s COMMENT
  86 %s BOTH
  87 %s DEFSYMEXP
  88 %s MRI
  89 %%
  90
  91
  92 <BOTH,SCRIPT,EXPRESSION,COMMAND>"/*"    { comment(); }
  93
  94
  95 <DEFSYMEXP>"-"                  { RTOKEN('-');}
  96 <DEFSYMEXP>"+"                  { RTOKEN('+');}
  97 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = buystring(yytext); return NAME; }
  98 <DEFSYMEXP>[ \t]                { RTOKEN(DEFSYMEND); }
  99 <DEFSYMEXP>"="                  { RTOKEN('='); }
 100 <COMMAND>"-defsym"{WHITE}*      { return OPTION_defsym; }
 101 <COMMAND>"-noinhibit_exec"      { return OPTION_noinhibit_exec; }
 102 <COMMAND>"-noinhibit-exec"      { return OPTION_noinhibit_exec; }
 103 <COMMAND>"-sort_common"         { return OPTION_sort_common;}
 104 <COMMAND>"-sort-common"         { return OPTION_sort_common;}
 105 <COMMAND>"-format"              { return OPTION_format; }
 106 <COMMAND>"-n"                   { return OPTION_n; }
 107 <COMMAND>"-N"                   { return OPTION_N; }
 108 <COMMAND>"-r"                   { return OPTION_r; }
 109 <COMMAND>"-relax"               { return OPTION_relax; }
 110 <COMMAND>"-i"                   { return OPTION_r; }
 111 <COMMAND>"-Ur"                  { return OPTION_Ur; }
 112 <COMMAND>"-o"                   { return OPTION_o; }
 113 <COMMAND>"-g"                   { return OPTION_g; }
 114 <COMMAND>"-e"                   { return OPTION_e; }
 115 <COMMAND>"-b"                   { return OPTION_b; }
 116 <COMMAND>"-dc"                  { return OPTION_dc; }
 117 <COMMAND>"-dp"                  { return OPTION_dp; }
 118 <COMMAND>"-d"                   { return OPTION_d; }
 119 <COMMAND>"-v"                   { return OPTION_v; }
 120 <COMMAND>"-V"                   { return OPTION_V; }
 121 <COMMAND>"-M"                   { return OPTION_M; }
 122 <COMMAND>"-Map"                 { return OPTION_Map;}
 123 <COMMAND>"-t"                   { return OPTION_t; }
 124 <COMMAND>"-X"                   { return OPTION_X; }
 125 <COMMAND>"-x"                   { return OPTION_x; }
 126 <COMMAND>"-c"                   { return OPTION_c; }
 127 <COMMAND>"-R"                   { return OPTION_R; }
 128 <COMMAND>"-u"                   { return OPTION_u; }
 129 <COMMAND>"-s"                   { return OPTION_s; }
 130 <COMMAND>"-S"                   { return OPTION_S; }
 131 <COMMAND>"-Bstat"               { return OPTION_Bstatic; }
 132 <COMMAND>"-B"{FILENAME}         { /* Ignored */ }
 133 <COMMAND>"-l"{FILENAME}         {
 134                                         yylval.name = buystring(yytext+2);
 135                                         return OPTION_l;
 136                                 }
 137
 138 <COMMAND>"-L"{FILENAME}         {
 139                                         yylval.name = buystring(yytext+2);
 140                                         return OPTION_L;
 141                                 }
 142 <COMMAND>"-Ttext"               {
 143                                  yylval.name = ".text";
 144                                  return OPTION_Texp;
 145                                 }
 146 <COMMAND>"-Tdata"               {
 147                                  yylval.name = ".data";
 148                                  return OPTION_Texp;
 149                                }
 150 <COMMAND>"-Tbss"                {
 151                                  yylval.name = ".bss";
 152                                  return OPTION_Texp;
 153                                }
 154 <COMMAND>"-O"{FILENAME}         {
 155                                 yylval.name = buystring(yytext+2);
 156                                 return OPTION_Texp;
 157                                 }
 158
 159 <COMMAND>"-T"{FILENAME}         {
 160                                  yylval.name = buystring(yytext+2);
 161                                  return OPTION_Tfile;
 162                                }
 163 <COMMAND>"-T"                   {
 164                                  return OPTION_T;
 165                                }
 166
 167 <COMMAND>"-F"{FILENAME}         {
 168                                  return OPTION_F;
 169                                }
 170 <COMMAND>"-F"                   {
 171                                  return OPTION_F;
 172                                }
 173
 174 <COMMAND>"-y"{FILENAME}         {
 175                                         yylval.name = buystring(yytext+2);
 176                                         return OPTION_y;
 177                                 }
 178
 179 <COMMAND>"-A"{FILENAME}         {
 180                                         yylval.name = buystring(yytext+2);
 181                                         return OPTION_Aarch;
 182                                 }
 183
 184 <COMMAND>"-retain-symbols-file" { return OPTION_RETAIN_SYMBOLS_FILE; }
 185
 186 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 187                                 yylval.integer = strtoul(yytext+1, 0,16);
 188                                 return INT;
 189                         }
 190
 191 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|X|B|O|D) {
 192                                    int base ;
 193                                    switch (yytext[yyleng-1]) {
 194                                     case 'X':
 195                                     case 'H':
 196                                      base = 16;
 197                                      break;
 198                                     case 'O':
 199                                      base = 8;
 200                                      break;
 201                                     case 'B':
 202                                      base = 2;
 203                                      break;
 204                                     default:
 205                                      base = 10;
 206                                    }
 207                                    yylval.integer = strtoul(yytext+1, 0, base);
 208                                    return INT;
 209                                  }
 210 <DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 211                                   yylval.integer = strtoul(yytext,0,hex_mode);
 212                                   if (yytext[yyleng-1]=='M'
 213                                         || yytext[yyleng-1] == 'm') {
 214                                       yylval.integer *= 1024*1024;
 215                                     }
 216                                   if (yytext[yyleng-1]=='K'
 217                                 || yytext[yyleng-1]=='k') {
 218                                       yylval.integer *= 1024;
 219                                     }
 220                                   return INT;
 221                                 }
 222 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 223 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 224 <BOTH,SCRIPT,EXPRESSION>"<<="   { RTOKEN(LSHIFTEQ);}
 225 <BOTH,SCRIPT,EXPRESSION>">>="   { RTOKEN(RSHIFTEQ);}
 226 <BOTH,SCRIPT,EXPRESSION>"||"    { RTOKEN(OROR);}
 227 <BOTH,SCRIPT,EXPRESSION>"=="    { RTOKEN(EQ);}
 228 <BOTH,SCRIPT,EXPRESSION>"!="    { RTOKEN(NE);}
 229 <BOTH,SCRIPT,EXPRESSION>">="    { RTOKEN(GE);}
 230 <BOTH,SCRIPT,EXPRESSION>"<="    { RTOKEN(LE);}
 231 <BOTH,SCRIPT,EXPRESSION>"<<"    { RTOKEN(LSHIFT);}
 232 <BOTH,SCRIPT,EXPRESSION>">>"    { RTOKEN(RSHIFT);}
 233 <BOTH,SCRIPT,EXPRESSION>"+="    { RTOKEN(PLUSEQ);}
 234 <BOTH,SCRIPT,EXPRESSION>"-="    { RTOKEN(MINUSEQ);}
 235 <BOTH,SCRIPT,EXPRESSION>"*="    { RTOKEN(MULTEQ);}
 236 <BOTH,SCRIPT,EXPRESSION>"/="    { RTOKEN(DIVEQ);}
 237 <BOTH,SCRIPT,EXPRESSION>"&="    { RTOKEN(ANDEQ);}
 238 <BOTH,SCRIPT,EXPRESSION>"|="    { RTOKEN(OREQ);}
 239 <BOTH,SCRIPT,EXPRESSION>"&&"    { RTOKEN(ANDAND);}
 240 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 241 <MRI,BOTH,SCRIPT,EXPRESSION>","         { RTOKEN(',');}
 242 <BOTH,SCRIPT,EXPRESSION>"&"             { RTOKEN('&');}
 243 <BOTH,SCRIPT,EXPRESSION>"|"             { RTOKEN('|');}
 244 <BOTH,SCRIPT,EXPRESSION>"~"             { RTOKEN('~');}
 245 <BOTH,SCRIPT,EXPRESSION>"!"             { RTOKEN('!');}
 246 <BOTH,SCRIPT,EXPRESSION>"?"             { RTOKEN('?');}
 247 <BOTH,SCRIPT,EXPRESSION>"*"             { RTOKEN('*');}
 248 <BOTH,SCRIPT,EXPRESSION>"+"             { RTOKEN('+');}
 249 <BOTH,SCRIPT,EXPRESSION>"-"             { RTOKEN('-');}
 250 <BOTH,SCRIPT,EXPRESSION>"/"             { RTOKEN('/');}
 251 <BOTH,SCRIPT,EXPRESSION>"%"             { RTOKEN('%');}
 252 <BOTH,SCRIPT,EXPRESSION>"<"             { RTOKEN('<');}
 253 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 254 <MRI,BOTH,SCRIPT,EXPRESSION>"="          { RTOKEN('=');}
 255 <BOTH,SCRIPT,EXPRESSION>"}"                     { RTOKEN('}') ; }
 256 <BOTH,SCRIPT,EXPRESSION>"{"                     { RTOKEN('{'); }
 257 <BOTH,SCRIPT,EXPRESSION>")"                     { RTOKEN(')');}
 258 <BOTH,SCRIPT,EXPRESSION>"("                     { RTOKEN('(');}
 259 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 260 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 261 <BOTH,SCRIPT,EXPRESSION>":"             { RTOKEN(':'); }
 262 <BOTH,SCRIPT,EXPRESSION>";"             { RTOKEN(';');}
 263 <BOTH,SCRIPT,EXPRESSION>"-"             { RTOKEN('-');}
 264 <BOTH,SCRIPT,EXPRESSION>"/"             { RTOKEN('/');}
 265 <BOTH,SCRIPT>"MEMORY"           { RTOKEN(MEMORY);}
 266 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 267 <BOTH,SCRIPT>"BLOCK"                    { RTOKEN(BLOCK);}
 268 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 269 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 270 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 271 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 272 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 273 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 274 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 275 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 276 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 277 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 278 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 279 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 280 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 281 <BOTH,SCRIPT>"DEFINED"          { RTOKEN(DEFINED);}
 282 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 283 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 284 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 285 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 286 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 287 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 288 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 289 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 290 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 291 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 292 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 293 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 294 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 295 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 296 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 297 <BOTH,SCRIPT>"NOLOAD"           { RTOKEN(NOLOAD);}
 298 <BOTH,SCRIPT>"DSECT"                    { RTOKEN(DSECT);}
 299 <BOTH,SCRIPT>"COPY"                     { RTOKEN(COPY);}
 300 <BOTH,SCRIPT>"INFO"                     { RTOKEN(INFO);}
 301 <BOTH,SCRIPT>"OVERLAY"          { RTOKEN(OVERLAY);}
 302 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 303 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 304 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 305 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 306 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 307 <MRI>"*".*                      { /* Mri comment line */ }
 308 <MRI>"END"                      { RTOKEN(ENDWORD); }
 309 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 310 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 311
 312 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 313 <MRI>"BASE"                     { RTOKEN(BASE); }
 314 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 315 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 316 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 317 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 318 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 319 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 320 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 321 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 322 <MRI>"SECT"                     { RTOKEN(SECT); }
 323 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 324 <MRI>"end"                      { RTOKEN(ENDWORD); }
 325 <MRI>"chip"                     { RTOKEN(CHIP); }
 326 <MRI>"load"                     { RTOKEN(LOAD); }
 327 <MRI>"order"                    { RTOKEN(ORDER); }
 328 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 329 <MRI>"format"                   { RTOKEN(FORMAT); }
 330 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 331 <MRI>"sect"                     { RTOKEN(SECT); }
 332 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 333
 334 <COMMAND>{CMDFILENAMECHAR1}{CMDFILENAMECHAR}*   {
 335                                  yylval.name = buystring(yytext);
 336                                   return NAME;
 337                                 }
 338
 339
 340 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 341 /* Filename without commas, needed to parse mri stuff */
 342                                  yylval.name = buystring(yytext);
 343                                   return NAME;
 344                                 }
 345
 346
 347 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 348                                  yylval.name = buystring(yytext);
 349                                   return NAME;
 350                                 }
 351 <SCRIPT,COMMAND>{FILENAMECHAR}* { yylval.name = buystring(yytext);
 352                                   return NAME;
 353                                 }
 354
 355 <EXPRESSION,BOTH,COMMAND,SCRIPT>"\""[^\"]*"\"" {
 356                                         /* No matter the state, quotes
 357                                            give what's inside */
 358                                         yylval.name = buystring(yytext+1);
 359                                         yylval.name[yyleng-2] = 0;
 360                                         return NAME;
 361                                 }
 362 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 363 <MRI,COMMAND,BOTH,SCRIPT,EXPRESSION>[ \t]
 364
 365 <<EOF>> {
 366     include_stack_ptr--;
 367
 368     if (include_stack_ptr == 0)
 369     {
 370       yyterminate();
 371     }
 372     else
 373     {
 374       yy_switch_to_buffer(include_stack[include_stack_ptr]);
 375     }
 376         BEGIN(COMMAND);
 377         return END;
 378   }
 379
 380 %%
 381
 382 void
 383 DEFUN(lex_push_file,(file),
 384      FILE *file)
 385 {
 386   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 387   {
 388     einfo("%F:includes nested too deeply");
 389   }
 390   include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
 391   yyin = file;
 392   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 393
 394   BEGIN(SCRIPT);
 395 }
 396
 397 YY_BUFFER_STATE
 398 DEFUN(yy_create_string_buffer,(string,  size),
 399       CONST char *string AND
 400       int size )
 401 {
 402   YY_BUFFER_STATE b;
 403
 404   b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) );
 405   b->yy_input_file = 0;
 406
 407   if ( ! b )
 408    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 409
 410   b->yy_buf_size = size;
 411
 412   /* yy_ch_buf has to be 2 characters longer than the size given because
 413    * we need to put in 2 end-of-buffer characters.
 414    */
 415   b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 3) );
 416
 417   if ( ! b->yy_ch_buf )
 418    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 419
 420
 421   b->yy_ch_buf[0] = '\n';
 422   strcpy(b->yy_ch_buf+1,  string);
 423   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 424   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 425     b->yy_n_chars = size+1;
 426   b->yy_buf_pos = &b->yy_ch_buf[1];
 427
 428   b->yy_eof_status = EOF_NOT_SEEN;
 429
 430   return ( b );
 431 }
 432
 433
 434
 435 void
 436 DEFUN(lex_redirect,( string),
 437     CONST  char *string)
 438 {
 439   YY_BUFFER_STATE tmp;
 440
 441   int len = strlen(string);
 442 yy_init = 0  ;
 443   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 444   {
 445     einfo("%F: macros nested too deeply");
 446   }
 447   include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
 448
 449   tmp =   yy_create_string_buffer(string, len);
 450
 451   yy_switch_to_buffer(tmp);
 452   BEGIN(COMMAND);
 453 yyout = stdout;
 454 }
 455
 456 int state_stack[20];
 457 int *state_stack_p = state_stack;
 458
 459 void
 460 DEFUN_VOID(ldlex_script)
 461 {
 462 *(state_stack_p)++ = yy_start;
 463
 464 BEGIN(SCRIPT);
 465 }
 466
 467
 468 void
 469 DEFUN_VOID(ldlex_mri_script)
 470 {
 471 *(state_stack_p)++ = yy_start;
 472 BEGIN(MRI);
 473 }
 474
 475 void
 476 DEFUN_VOID(ldlex_defsym)
 477 {
 478 *(state_stack_p)++ = yy_start;
 479 BEGIN(DEFSYMEXP);
 480 }
 481
 482 void
 483 DEFUN_VOID(ldlex_expression)
 484 {
 485 *(state_stack_p)++ = yy_start;
 486 BEGIN(EXPRESSION);
 487
 488 }
 489 void
 490 DEFUN_VOID(ldlex_both)
 491 {
 492 *(state_stack_p)++ = yy_start;
 493 BEGIN(BOTH);
 494 }
 495 void
 496 DEFUN_VOID(ldlex_command)
 497 {
 498 *(state_stack_p)++ = yy_start;
 499 BEGIN(COMMAND);
 500 }
 501
 502 void
 503 DEFUN_VOID(ldlex_popstate)
 504 {
 505 yy_start = *(--state_stack_p);
 506 }
 507
 508 yy_input(buf, result, max_size)
 509 char *buf;
 510 int *result;
 511 int max_size;
 512 {
 513   *result = 0;
 514   if (yy_current_buffer->yy_input_file)
 515   {
 516     if (yyin)
 517      if ( (*result = read( fileno(yyin), (char *) buf, max_size )) < 0 )
 518       YY_FATAL_ERROR( "read() in flex scanner failed" );
 519   }
 520 }
 521
 522 static
 523 comment()
 524 {
 525   int c;
 526   while (1)
 527   {
 528     c = input();
 529     while (c !='*' && c != EOF)
 530     {
 531       if (c == '\n') lineno++;
 532       c = input();
 533     }
 534
 535
 536     if (c == '*')
 537     {
 538       c = input();
 539       while ( c == '*')
 540        c = input();
 541       if ( c == '/' )
 542        break;                   /* found the end */
 543     }
 544
 545     if ( c == EOF )
 546     {
 547       einfo( "%F%P :EOF in comment");
 548       break;
 549     }
 550   }
 551 }