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 <COMMAND>"-EB"                          {
 188                                  return OPTION_EB;
 189                                }
 190 <COMMAND>"-EL"                  {
 191                                  return OPTION_EL;
 192                                }
 193 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 194                                 yylval.integer = strtoul(yytext+1, 0,16);
 195                                 return INT;
 196                         }
 197
 198 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|X|B|O|D) {
 199                                    int base ;
 200                                    switch (yytext[yyleng-1]) {
 201                                     case 'X':
 202                                     case 'H':
 203                                      base = 16;
 204                                      break;
 205                                     case 'O':
 206                                      base = 8;
 207                                      break;
 208                                     case 'B':
 209                                      base = 2;
 210                                      break;
 211                                     default:
 212                                      base = 10;
 213                                    }
 214                                    yylval.integer = strtoul(yytext+1, 0, base);
 215                                    return INT;
 216                                  }
 217 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 218                                   yylval.integer = strtoul(yytext,0,hex_mode);
 219                                   if (yytext[yyleng-1]=='M'
 220                                         || yytext[yyleng-1] == 'm') {
 221                                       yylval.integer *= 1024*1024;
 222                                     }
 223                                   if (yytext[yyleng-1]=='K'
 224                                 || yytext[yyleng-1]=='k') {
 225                                       yylval.integer *= 1024;
 226                                     }
 227                                   return INT;
 228                                 }
 229 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 230 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 231 <BOTH,SCRIPT,EXPRESSION>"<<="   { RTOKEN(LSHIFTEQ);}
 232 <BOTH,SCRIPT,EXPRESSION>">>="   { RTOKEN(RSHIFTEQ);}
 233 <BOTH,SCRIPT,EXPRESSION>"||"    { RTOKEN(OROR);}
 234 <BOTH,SCRIPT,EXPRESSION>"=="    { RTOKEN(EQ);}
 235 <BOTH,SCRIPT,EXPRESSION>"!="    { RTOKEN(NE);}
 236 <BOTH,SCRIPT,EXPRESSION>">="    { RTOKEN(GE);}
 237 <BOTH,SCRIPT,EXPRESSION>"<="    { RTOKEN(LE);}
 238 <BOTH,SCRIPT,EXPRESSION>"<<"    { RTOKEN(LSHIFT);}
 239 <BOTH,SCRIPT,EXPRESSION>">>"    { RTOKEN(RSHIFT);}
 240 <BOTH,SCRIPT,EXPRESSION>"+="    { RTOKEN(PLUSEQ);}
 241 <BOTH,SCRIPT,EXPRESSION>"-="    { RTOKEN(MINUSEQ);}
 242 <BOTH,SCRIPT,EXPRESSION>"*="    { RTOKEN(MULTEQ);}
 243 <BOTH,SCRIPT,EXPRESSION>"/="    { RTOKEN(DIVEQ);}
 244 <BOTH,SCRIPT,EXPRESSION>"&="    { RTOKEN(ANDEQ);}
 245 <BOTH,SCRIPT,EXPRESSION>"|="    { RTOKEN(OREQ);}
 246 <BOTH,SCRIPT,EXPRESSION>"&&"    { RTOKEN(ANDAND);}
 247 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 248 <MRI,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 <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 <MRI,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,EXPRESSION>"]"             { RTOKEN(']');}
 267 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 268 <BOTH,SCRIPT,EXPRESSION>":"             { RTOKEN(':'); }
 269 <BOTH,SCRIPT,EXPRESSION>";"             { RTOKEN(';');}
 270 <BOTH,SCRIPT,EXPRESSION>"-"             { RTOKEN('-');}
 271 <BOTH,SCRIPT,EXPRESSION>"/"             { RTOKEN('/');}
 272 <BOTH,SCRIPT>"MEMORY"           { RTOKEN(MEMORY);}
 273 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 274 <BOTH,SCRIPT>"BLOCK"                    { RTOKEN(BLOCK);}
 275 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 276 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 277 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 278 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 279 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 280 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 281 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 282 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 283 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 284 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 285 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 286 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 287 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 288 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 289 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 290 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 291 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 292 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 293 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 294 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 295 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 296 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 297 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 298 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 299 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 300 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 301 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 302 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 303 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 304 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"                { RTOKEN(NOLOAD);}
 305 <BOTH,SCRIPT>"DSECT"                    { RTOKEN(DSECT);}
 306 <BOTH,SCRIPT>"COPY"                     { RTOKEN(COPY);}
 307 <BOTH,SCRIPT>"INFO"                     { RTOKEN(INFO);}
 308 <BOTH,SCRIPT>"OVERLAY"          { RTOKEN(OVERLAY);}
 309 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 310 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 311 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 312 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 313 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
 314 <EXPRESSION,BOTH,SCRIPT>"AT"                    { RTOKEN(AT);}
 315 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 316 <MRI>"*".*                      { /* Mri comment line */ }
 317 <MRI>"END"                      { RTOKEN(ENDWORD); }
 318 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 319 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 320
 321 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 322 <MRI>"BASE"                     { RTOKEN(BASE); }
 323 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 324 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 325 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 326 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 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 <MRI>"end"                      { RTOKEN(ENDWORD); }
 334 <MRI>"chip"                     { RTOKEN(CHIP); }
 335 <MRI>"load"                     { RTOKEN(LOAD); }
 336 <MRI>"order"                    { RTOKEN(ORDER); }
 337 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 338 <MRI>"format"                   { RTOKEN(FORMAT); }
 339 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 340 <MRI>"sect"                     { RTOKEN(SECT); }
 341 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 342
 343 <COMMAND>{CMDFILENAMECHAR1}{CMDFILENAMECHAR}*   {
 344                                  yylval.name = buystring(yytext);
 345                                   return NAME;
 346                                 }
 347
 348
 349 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 350 /* Filename without commas, needed to parse mri stuff */
 351                                  yylval.name = buystring(yytext);
 352                                   return NAME;
 353                                 }
 354
 355
 356 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 357                                  yylval.name = buystring(yytext);
 358                                   return NAME;
 359                                 }
 360 <SCRIPT,COMMAND>{FILENAMECHAR}* { yylval.name = buystring(yytext);
 361                                   return NAME;
 362                                 }
 363
 364 <EXPRESSION,BOTH,COMMAND,SCRIPT>"\""[^\"]*"\"" {
 365                                         /* No matter the state, quotes
 366                                            give what's inside */
 367                                         yylval.name = buystring(yytext+1);
 368                                         yylval.name[yyleng-2] = 0;
 369                                         return NAME;
 370                                 }
 371 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 372 <MRI,COMMAND,BOTH,SCRIPT,EXPRESSION>[ \t]
 373
 374 <<EOF>> {
 375   extern char *ldfile_input_filename;
 376   include_stack_ptr--;
 377
 378   if (include_stack_ptr == 0)
 379   {
 380     yyterminate();
 381   }
 382   else
 383   {
 384     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 385
 386   }
 387   if (include_stack_ptr==1)
 388   {
 389     BEGIN(COMMAND);
 390   }
 391   else
 392   {
 393     BEGIN(SCRIPT);
 394     ldfile_input_filename = file_name_stack[include_stack_ptr-1];
 395   }
 396
 397   return END;
 398 }
 399
 400 %%
 401
 402 void
 403 DEFUN(lex_push_file,(file,name),
 404      FILE *file AND
 405      char *name)
 406 {
 407   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 408   {
 409     einfo("%F:includes nested too deeply");
 410   }
 411   file_name_stack[include_stack_ptr] = name;
 412   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 413
 414   include_stack_ptr++;
 415   yyin = file;
 416   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 417
 418   BEGIN(SCRIPT);
 419 }
 420
 421 YY_BUFFER_STATE
 422 DEFUN(yy_create_string_buffer,(string,  size),
 423       CONST char *string AND
 424       int size )
 425 {
 426   YY_BUFFER_STATE b;
 427
 428   b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) );
 429   b->yy_input_file = 0;
 430
 431   if ( ! b )
 432    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 433
 434   b->yy_buf_size = size;
 435
 436   /* yy_ch_buf has to be 2 characters longer than the size given because
 437    * we need to put in 2 end-of-buffer characters.
 438    */
 439   b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 3) );
 440
 441   if ( ! b->yy_ch_buf )
 442    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 443
 444
 445   b->yy_ch_buf[0] = '\n';
 446   strcpy(b->yy_ch_buf+1,  string);
 447   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 448   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 449     b->yy_n_chars = size+1;
 450   b->yy_buf_pos = &b->yy_ch_buf[1];
 451
 452   b->yy_eof_status = EOF_NOT_SEEN;
 453
 454   return ( b );
 455 }
 456
 457
 458
 459 void
 460 DEFUN(lex_redirect,( string),
 461     CONST  char *string)
 462 {
 463   YY_BUFFER_STATE tmp;
 464
 465   int len = strlen(string);
 466   yy_init = 0  ;
 467   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 468   {
 469     einfo("%F: macros nested too deeply");
 470   }
 471   file_name_stack[include_stack_ptr] = "redirect";
 472   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 473   include_stack_ptr++;
 474   tmp =   yy_create_string_buffer(string, len);
 475
 476   yy_switch_to_buffer(tmp);
 477   BEGIN(COMMAND);
 478   yyout = stdout;
 479 }
 480
 481 int state_stack[20];
 482 int *state_stack_p = state_stack;
 483
 484 void
 485 DEFUN_VOID(ldlex_script)
 486 {
 487   *(state_stack_p)++ = yy_start;
 488
 489   BEGIN(SCRIPT);
 490 }
 491
 492
 493 void
 494 DEFUN_VOID(ldlex_mri_script)
 495 {
 496   *(state_stack_p)++ = yy_start;
 497   BEGIN(MRI);
 498 }
 499
 500 void
 501 DEFUN_VOID(ldlex_defsym)
 502 {
 503   *(state_stack_p)++ = yy_start;
 504   BEGIN(DEFSYMEXP);
 505 }
 506
 507 void
 508 DEFUN_VOID(ldlex_expression)
 509 {
 510   *(state_stack_p)++ = yy_start;
 511   BEGIN(EXPRESSION);
 512
 513 }
 514 void
 515 DEFUN_VOID(ldlex_both)
 516 {
 517   *(state_stack_p)++ = yy_start;
 518   BEGIN(BOTH);
 519 }
 520 void
 521 DEFUN_VOID(ldlex_command)
 522 {
 523   *(state_stack_p)++ = yy_start;
 524   BEGIN(COMMAND);
 525 }
 526
 527 void
 528 DEFUN_VOID(ldlex_popstate)
 529 {
 530   yy_start = *(--state_stack_p);
 531 }
 532
 533 yy_input(buf, result, max_size)
 534 char *buf;
 535 int *result;
 536 int max_size;
 537 {
 538   *result = 0;
 539   if (yy_current_buffer->yy_input_file)
 540   {
 541     if (yyin)
 542      if ( (*result = read( fileno(yyin), (char *) buf, max_size )) < 0 )
 543       YY_FATAL_ERROR( "read() in flex scanner failed" );
 544   }
 545 }
 546
 547 static
 548 comment()
 549 {
 550   int c;
 551   while (1)
 552   {
 553     c = input();
 554     while (c !='*' && c != EOF)
 555     {
 556       if (c == '\n') lineno++;
 557       c = input();
 558     }
 559
 560
 561     if (c == '*')
 562     {
 563       c = input();
 564       while ( c == '*')
 565        c = input();
 566       if ( c == '/' )
 567        break;                   /* found the end */
 568     }
 569
 570     if ( c == EOF )
 571     {
 572       einfo( "%F%P :EOF in comment");
 573       break;
 574     }
 575   }
 576 }