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 char *file_name_stack[MAX_INCLUDE_DEPTH];
  55 unsigned int include_stack_ptr = 0;
  56
  57
  58 /* STATES
  59         COMMAND         on command line
  60         COMMENT         in a C comment
  61         EXPRESSION      definiatelyt in an expression
  62         SCRIPT          definately in a script
  63         SOMEWHERE       either EXPRESSION or SCRIPT
  64         MRI             in an MRI script
  65 */
  66 #define RTOKEN(x)  {  yylval.token = x; return x; }
  67 %}
  68
  69 %a 4000
  70 %o 5000
  71
  72 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
  73 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
  74 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
  75 SYMBOLCHARN     [_a-zA-Z\/\.\\0-9]
  76 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
  77 FILENAME        {FILENAMECHAR}+
  78 WHITE           [ \t\n]+
  79
  80 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
  81
  82
  83 %s COMMAND
  84 %s SCRIPT
  85 %s EXPRESSION
  86 %s COMMENT
  87 %s BOTH
  88 %s DEFSYMEXP
  89 %s MRI
  90 %%
  91
  92
  93 <BOTH,SCRIPT,EXPRESSION,COMMAND>"/*"    { comment(); }
  94
  95
  96 <DEFSYMEXP>"-"                  { RTOKEN('-');}
  97 <DEFSYMEXP>"+"                  { RTOKEN('+');}
  98 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = buystring(yytext); return NAME; }
  99 <DEFSYMEXP>[ \t]                { RTOKEN(DEFSYMEND); }
 100 <DEFSYMEXP>"="                  { RTOKEN('='); }
 101 <COMMAND>"-defsym"{WHITE}*      { return OPTION_defsym; }
 102 <COMMAND>"-noinhibit_exec"      { return OPTION_noinhibit_exec; }
 103 <COMMAND>"-noinhibit-exec"      { return OPTION_noinhibit_exec; }
 104 <COMMAND>"-sort_common"         { return OPTION_sort_common;}
 105 <COMMAND>"-sort-common"         { return OPTION_sort_common;}
 106 <COMMAND>"-format"              { return OPTION_format; }
 107 <COMMAND>"-n"                   { return OPTION_n; }
 108 <COMMAND>"-N"                   { return OPTION_N; }
 109 <COMMAND>"-r"                   { return OPTION_r; }
 110 <COMMAND>"-relax"               { return OPTION_relax; }
 111 <COMMAND>"-i"                   { return OPTION_r; }
 112 <COMMAND>"-Ur"                  { return OPTION_Ur; }
 113 <COMMAND>"-o"                   { return OPTION_o; }
 114 <COMMAND>"-g"                   { return OPTION_g; }
 115 <COMMAND>"-e"                   { return OPTION_e; }
 116 <COMMAND>"-b"                   { return OPTION_b; }
 117 <COMMAND>"-dc"                  { return OPTION_dc; }
 118 <COMMAND>"-dp"                  { return OPTION_dp; }
 119 <COMMAND>"-d"                   { return OPTION_d; }
 120 <COMMAND>"-v"                   { return OPTION_v; }
 121 <COMMAND>"-V"                   { return OPTION_V; }
 122 <COMMAND>"-M"                   { return OPTION_M; }
 123 <COMMAND>"-Map"                 { return OPTION_Map;}
 124 <COMMAND>"-t"                   { return OPTION_t; }
 125 <COMMAND>"-X"                   { return OPTION_X; }
 126 <COMMAND>"-x"                   { return OPTION_x; }
 127 <COMMAND>"-c"                   { return OPTION_c; }
 128 <COMMAND>"-R"                   { return OPTION_R; }
 129 <COMMAND>"-u"                   { return OPTION_u; }
 130 <COMMAND>"-s"                   { return OPTION_s; }
 131 <COMMAND>"-S"                   { return OPTION_S; }
 132 <COMMAND>"-Bstat"               { return OPTION_Bstatic; }
 133 <COMMAND>"-B"{FILENAME}         { /* Ignored */ }
 134 <COMMAND>"-l"{FILENAME}         {
 135                                         yylval.name = buystring(yytext+2);
 136                                         return OPTION_l;
 137                                 }
 138
 139 <COMMAND>"-L"{FILENAME}         {
 140                                         yylval.name = buystring(yytext+2);
 141                                         return OPTION_L;
 142                                 }
 143 <COMMAND>"-Ttext"               {
 144                                  yylval.name = ".text";
 145                                  return OPTION_Texp;
 146                                 }
 147 <COMMAND>"-Tdata"               {
 148                                  yylval.name = ".data";
 149                                  return OPTION_Texp;
 150                                }
 151 <COMMAND>"-Tbss"                {
 152                                  yylval.name = ".bss";
 153                                  return OPTION_Texp;
 154                                }
 155 <COMMAND>"-O"{FILENAME}         {
 156                                 yylval.name = buystring(yytext+2);
 157                                 return OPTION_Texp;
 158                                 }
 159
 160 <COMMAND>"-T"{FILENAME}         {
 161                                  yylval.name = buystring(yytext+2);
 162                                  return OPTION_Tfile;
 163                                }
 164 <COMMAND>"-T"                   {
 165                                  return OPTION_T;
 166                                }
 167
 168 <COMMAND>"-F"{FILENAME}         {
 169                                  return OPTION_F;
 170                                }
 171 <COMMAND>"-F"                   {
 172                                  return OPTION_F;
 173                                }
 174
 175 <COMMAND>"-y"{FILENAME}         {
 176                                         yylval.name = buystring(yytext+2);
 177                                         return OPTION_y;
 178                                 }
 179
 180 <COMMAND>"-A"{FILENAME}         {
 181                                         yylval.name = buystring(yytext+2);
 182                                         return OPTION_Aarch;
 183                                 }
 184
 185 <COMMAND>"-retain-symbols-file" { return OPTION_RETAIN_SYMBOLS_FILE; }
 186
 187 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 188                                 yylval.integer = strtoul(yytext+1, 0,16);
 189                                 return INT;
 190                         }
 191
 192 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|X|B|O|D) {
 193                                    int base ;
 194                                    switch (yytext[yyleng-1]) {
 195                                     case 'X':
 196                                     case 'H':
 197                                      base = 16;
 198                                      break;
 199                                     case 'O':
 200                                      base = 8;
 201                                      break;
 202                                     case 'B':
 203                                      base = 2;
 204                                      break;
 205                                     default:
 206                                      base = 10;
 207                                    }
 208                                    yylval.integer = strtoul(yytext+1, 0, base);
 209                                    return INT;
 210                                  }
 211 <DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 212                                   yylval.integer = strtoul(yytext,0,hex_mode);
 213                                   if (yytext[yyleng-1]=='M'
 214                                         || yytext[yyleng-1] == 'm') {
 215                                       yylval.integer *= 1024*1024;
 216                                     }
 217                                   if (yytext[yyleng-1]=='K'
 218                                 || yytext[yyleng-1]=='k') {
 219                                       yylval.integer *= 1024;
 220                                     }
 221                                   return INT;
 222                                 }
 223 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 224 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 225 <BOTH,SCRIPT,EXPRESSION>"<<="   { RTOKEN(LSHIFTEQ);}
 226 <BOTH,SCRIPT,EXPRESSION>">>="   { RTOKEN(RSHIFTEQ);}
 227 <BOTH,SCRIPT,EXPRESSION>"||"    { RTOKEN(OROR);}
 228 <BOTH,SCRIPT,EXPRESSION>"=="    { RTOKEN(EQ);}
 229 <BOTH,SCRIPT,EXPRESSION>"!="    { RTOKEN(NE);}
 230 <BOTH,SCRIPT,EXPRESSION>">="    { RTOKEN(GE);}
 231 <BOTH,SCRIPT,EXPRESSION>"<="    { RTOKEN(LE);}
 232 <BOTH,SCRIPT,EXPRESSION>"<<"    { RTOKEN(LSHIFT);}
 233 <BOTH,SCRIPT,EXPRESSION>">>"    { RTOKEN(RSHIFT);}
 234 <BOTH,SCRIPT,EXPRESSION>"+="    { RTOKEN(PLUSEQ);}
 235 <BOTH,SCRIPT,EXPRESSION>"-="    { RTOKEN(MINUSEQ);}
 236 <BOTH,SCRIPT,EXPRESSION>"*="    { RTOKEN(MULTEQ);}
 237 <BOTH,SCRIPT,EXPRESSION>"/="    { RTOKEN(DIVEQ);}
 238 <BOTH,SCRIPT,EXPRESSION>"&="    { RTOKEN(ANDEQ);}
 239 <BOTH,SCRIPT,EXPRESSION>"|="    { RTOKEN(OREQ);}
 240 <BOTH,SCRIPT,EXPRESSION>"&&"    { RTOKEN(ANDAND);}
 241 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 242 <MRI,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 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 255 <MRI,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,EXPRESSION>"/"             { RTOKEN('/');}
 266 <BOTH,SCRIPT>"MEMORY"           { RTOKEN(MEMORY);}
 267 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 268 <BOTH,SCRIPT>"BLOCK"                    { RTOKEN(BLOCK);}
 269 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 270 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 271 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 272 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 273 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 274 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 275 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 276 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 277 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 278 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 279 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 280 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 281 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 282 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 283 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 284 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 285 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 286 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 287 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 288 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 289 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 290 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 291 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 292 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 293 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 294 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 295 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 296 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 297 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 298 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"                { RTOKEN(NOLOAD);}
 299 <BOTH,SCRIPT>"DSECT"                    { RTOKEN(DSECT);}
 300 <BOTH,SCRIPT>"COPY"                     { RTOKEN(COPY);}
 301 <BOTH,SCRIPT>"INFO"                     { RTOKEN(INFO);}
 302 <BOTH,SCRIPT>"OVERLAY"          { RTOKEN(OVERLAY);}
 303 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 304 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 305 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 306 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 307 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
 308 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 309 <MRI>"*".*                      { /* Mri comment line */ }
 310 <MRI>"END"                      { RTOKEN(ENDWORD); }
 311 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 312 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 313
 314 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 315 <MRI>"BASE"                     { RTOKEN(BASE); }
 316 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 317 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 318 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 319 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 320 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 321 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 322 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 323 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 324 <MRI>"SECT"                     { RTOKEN(SECT); }
 325 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 326 <MRI>"end"                      { RTOKEN(ENDWORD); }
 327 <MRI>"chip"                     { RTOKEN(CHIP); }
 328 <MRI>"load"                     { RTOKEN(LOAD); }
 329 <MRI>"order"                    { RTOKEN(ORDER); }
 330 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 331 <MRI>"format"                   { RTOKEN(FORMAT); }
 332 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 333 <MRI>"sect"                     { RTOKEN(SECT); }
 334 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 335
 336 <COMMAND>{CMDFILENAMECHAR1}{CMDFILENAMECHAR}*   {
 337                                  yylval.name = buystring(yytext);
 338                                   return NAME;
 339                                 }
 340
 341
 342 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 343 /* Filename without commas, needed to parse mri stuff */
 344                                  yylval.name = buystring(yytext);
 345                                   return NAME;
 346                                 }
 347
 348
 349 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 350                                  yylval.name = buystring(yytext);
 351                                   return NAME;
 352                                 }
 353 <SCRIPT,COMMAND>{FILENAMECHAR}* { yylval.name = buystring(yytext);
 354                                   return NAME;
 355                                 }
 356
 357 <EXPRESSION,BOTH,COMMAND,SCRIPT>"\""[^\"]*"\"" {
 358                                         /* No matter the state, quotes
 359                                            give what's inside */
 360                                         yylval.name = buystring(yytext+1);
 361                                         yylval.name[yyleng-2] = 0;
 362                                         return NAME;
 363                                 }
 364 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 365 <MRI,COMMAND,BOTH,SCRIPT,EXPRESSION>[ \t]
 366
 367 <<EOF>> {
 368   extern char *ldfile_input_filename;
 369   include_stack_ptr--;
 370
 371   if (include_stack_ptr == 0)
 372   {
 373     yyterminate();
 374   }
 375   else
 376   {
 377     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 378
 379   }
 380   if (include_stack_ptr==1)
 381   {
 382     BEGIN(COMMAND);
 383   }
 384   else
 385   {
 386     ldfile_input_filename = file_name_stack[include_stack_ptr-1];
 387   }
 388
 389   return END;
 390 }
 391
 392 %%
 393
 394 void
 395 DEFUN(lex_push_file,(file,name),
 396      FILE *file AND
 397      char *name)
 398 {
 399   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 400   {
 401     einfo("%F:includes nested too deeply");
 402   }
 403   file_name_stack[include_stack_ptr] = name;
 404   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 405
 406   include_stack_ptr++;
 407   yyin = file;
 408   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 409
 410   BEGIN(SCRIPT);
 411 }
 412
 413 YY_BUFFER_STATE
 414 DEFUN(yy_create_string_buffer,(string,  size),
 415       CONST char *string AND
 416       int size )
 417 {
 418   YY_BUFFER_STATE b;
 419
 420   b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) );
 421   b->yy_input_file = 0;
 422
 423   if ( ! b )
 424    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 425
 426   b->yy_buf_size = size;
 427
 428   /* yy_ch_buf has to be 2 characters longer than the size given because
 429    * we need to put in 2 end-of-buffer characters.
 430    */
 431   b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 3) );
 432
 433   if ( ! b->yy_ch_buf )
 434    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 435
 436
 437   b->yy_ch_buf[0] = '\n';
 438   strcpy(b->yy_ch_buf+1,  string);
 439   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 440   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 441     b->yy_n_chars = size+1;
 442   b->yy_buf_pos = &b->yy_ch_buf[1];
 443
 444   b->yy_eof_status = EOF_NOT_SEEN;
 445
 446   return ( b );
 447 }
 448
 449
 450
 451 void
 452 DEFUN(lex_redirect,( string),
 453     CONST  char *string)
 454 {
 455   YY_BUFFER_STATE tmp;
 456
 457   int len = strlen(string);
 458   yy_init = 0  ;
 459   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 460   {
 461     einfo("%F: macros nested too deeply");
 462   }
 463   file_name_stack[include_stack_ptr] = "redirect";
 464   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 465   include_stack_ptr++;
 466   tmp =   yy_create_string_buffer(string, len);
 467
 468   yy_switch_to_buffer(tmp);
 469   BEGIN(COMMAND);
 470   yyout = stdout;
 471 }
 472
 473 int state_stack[20];
 474 int *state_stack_p = state_stack;
 475
 476 void
 477 DEFUN_VOID(ldlex_script)
 478 {
 479   *(state_stack_p)++ = yy_start;
 480
 481   BEGIN(SCRIPT);
 482 }
 483
 484
 485 void
 486 DEFUN_VOID(ldlex_mri_script)
 487 {
 488   *(state_stack_p)++ = yy_start;
 489   BEGIN(MRI);
 490 }
 491
 492 void
 493 DEFUN_VOID(ldlex_defsym)
 494 {
 495   *(state_stack_p)++ = yy_start;
 496   BEGIN(DEFSYMEXP);
 497 }
 498
 499 void
 500 DEFUN_VOID(ldlex_expression)
 501 {
 502   *(state_stack_p)++ = yy_start;
 503   BEGIN(EXPRESSION);
 504
 505 }
 506 void
 507 DEFUN_VOID(ldlex_both)
 508 {
 509   *(state_stack_p)++ = yy_start;
 510   BEGIN(BOTH);
 511 }
 512 void
 513 DEFUN_VOID(ldlex_command)
 514 {
 515   *(state_stack_p)++ = yy_start;
 516   BEGIN(COMMAND);
 517 }
 518
 519 void
 520 DEFUN_VOID(ldlex_popstate)
 521 {
 522   yy_start = *(--state_stack_p);
 523 }
 524
 525 yy_input(buf, result, max_size)
 526 char *buf;
 527 int *result;
 528 int max_size;
 529 {
 530   *result = 0;
 531   if (yy_current_buffer->yy_input_file)
 532   {
 533     if (yyin)
 534      if ( (*result = read( fileno(yyin), (char *) buf, max_size )) < 0 )
 535       YY_FATAL_ERROR( "read() in flex scanner failed" );
 536   }
 537 }
 538
 539 static
 540 comment()
 541 {
 542   int c;
 543   while (1)
 544   {
 545     c = input();
 546     while (c !='*' && c != EOF)
 547     {
 548       if (c == '\n') lineno++;
 549       c = input();
 550     }
 551
 552
 553     if (c == '*')
 554     {
 555       c = input();
 556       while ( c == '*')
 557        c = input();
 558       if ( c == '/' )
 559        break;                   /* found the end */
 560     }
 561
 562     if ( c == EOF )
 563     {
 564       einfo( "%F%P :EOF in comment");
 565       break;
 566     }
 567   }
 568 }