ld/ldlex.l

   1 %{
   2
   3 /* Copyright (C) 1991, 1993 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 #include <ansidecl.h>
  28 #include <stdio.h>
  29 #include "bfd.h"
  30 #include "sysdep.h"
  31 #include "ld.h"
  32 #include "ldgram.h"
  33 #include "ldmisc.h"
  34 #include "ldexp.h"
  35 #include "ldlang.h"
  36 #include "ldfile.h"
  37 #include "ldlex.h"
  38
  39 int ldgram_in_defsym;
  40
  41 int hex_mode;
  42
  43 unsigned int lineno = 1;
  44 int old;
  45
  46 #undef YY_INPUT
  47 #define YY_INPUT(buf,result,max_size) yy_input(buf, &result, max_size)
  48 #undef YY_FATAL_ERROR
  49 #define YY_FATAL_ERROR(s)
  50 #define MAX_INCLUDE_DEPTH 10
  51 YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
  52 char *file_name_stack[MAX_INCLUDE_DEPTH];
  53 unsigned int include_stack_ptr = 0;
  54
  55 static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
  56                                                         int size));
  57 static void yy_input PARAMS ((char *, int *result, int max_size));
  58 static void comment PARAMS ((void));
  59
  60 /* STATES
  61         COMMAND         on command line
  62         COMMENT         in a C comment
  63         EXPRESSION      definiatelyt in an expression
  64         SCRIPT          definately in a script
  65         SOMEWHERE       either EXPRESSION or SCRIPT
  66         MRI             in an MRI script
  67 */
  68 #define RTOKEN(x)  {  yylval.token = x; return x; }
  69 %}
  70
  71 %a 4000
  72 %o 5000
  73
  74 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
  75 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
  76 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
  77 SYMBOLCHARN     [_a-zA-Z\/\.\\0-9]
  78 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
  79 FILENAME        {FILENAMECHAR}+
  80 WHITE           [ \t\n]+
  81
  82 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
  83
  84
  85 %s COMMAND
  86 %s SCRIPT
  87 %s EXPRESSION
  88 %s COMMENT
  89 %s BOTH
  90 %s DEFSYMEXP
  91 %s MRI
  92 %%
  93
  94
  95 <BOTH,SCRIPT,EXPRESSION,COMMAND>"/*"    { comment(); }
  96
  97
  98 <DEFSYMEXP>"-"                  { RTOKEN('-');}
  99 <DEFSYMEXP>"+"                  { RTOKEN('+');}
 100 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = buystring(yytext); return NAME; }
 101 <DEFSYMEXP>[ \t]                { RTOKEN(DEFSYMEND); }
 102 <DEFSYMEXP>"="                  { RTOKEN('='); }
 103 <COMMAND>"--help"               { return OPTION_help; }
 104 <COMMAND>"--version"            { return OPTION_version; }
 105 <COMMAND>"-defsym"{WHITE}*      { return OPTION_defsym; }
 106 <COMMAND>"-format"              { return OPTION_format; }
 107 <COMMAND>"-noinhibit-exec"      { return OPTION_noinhibit_exec; }
 108 <COMMAND>"-noinhibit_exec"      { return OPTION_noinhibit_exec; }
 109 <COMMAND>"-oformat"             { return OPTION_oformat; }
 110 <COMMAND>"-sort-common"         { return OPTION_sort_common;}
 111 <COMMAND>"-sort_common"         { return OPTION_sort_common;}
 112 <COMMAND>"-warn-common"         { return OPTION_warn_common;}
 113 <COMMAND>"-n"                   { return OPTION_n; }
 114 <COMMAND>"-N"                   { return OPTION_N; }
 115 <COMMAND>"-r"                   { return OPTION_r; }
 116 <COMMAND>"-stats"               { return OPTION_stats; }
 117 <COMMAND>"-no-keep-memory"      { return OPTION_no_keep_memory; }
 118 <COMMAND>"-relax"               { return OPTION_relax; }
 119 <COMMAND>"-i"                   { return OPTION_r; }
 120 <COMMAND>"-Ur"                  { return OPTION_Ur; }
 121 <COMMAND>"-o"                   { return OPTION_o; }
 122 <COMMAND>"-g"                   { return OPTION_g; }
 123 <COMMAND>"-e"                   { return OPTION_e; }
 124 <COMMAND>"-b"                   { return OPTION_b; }
 125 <COMMAND>"-dc"                  { return OPTION_dc; }
 126 <COMMAND>"-dp"                  { return OPTION_dp; }
 127 <COMMAND>"-d"                   { return OPTION_d; }
 128 <COMMAND>"-v"                   { return OPTION_v; }
 129 <COMMAND>"-V"                   { return OPTION_V; }
 130 <COMMAND>"-m"                   { return OPTION_m; }
 131 <COMMAND>"-m"{FILENAME}         { return OPTION_memul; }
 132 <COMMAND>"-M"                   { return OPTION_M; }
 133 <COMMAND>"-Map"                 { return OPTION_Map;}
 134 <COMMAND>"-t"                   { return OPTION_t; }
 135 <COMMAND>"-X"                   { return OPTION_X; }
 136 <COMMAND>"-x"                   { return OPTION_x; }
 137 <COMMAND>"-c"                   { return OPTION_c; }
 138 <COMMAND>"-R"                   { return OPTION_R; }
 139 <COMMAND>"-u"                   { return OPTION_u; }
 140 <COMMAND>"-s"                   { return OPTION_s; }
 141 <COMMAND>"-S"                   { return OPTION_S; }
 142 <COMMAND>"-Bstat"               { return OPTION_Bstatic; }
 143 <COMMAND>"-B"{FILENAME}         { /* Ignored */ }
 144 <COMMAND>"-l"{FILENAME}         {
 145                                         yylval.name = buystring(yytext+2);
 146                                         return OPTION_l;
 147                                 }
 148
 149 <COMMAND>"-L"{FILENAME}         {
 150                                         yylval.name = buystring(yytext+2);
 151                                         return OPTION_Lfile;
 152                                 }
 153 <COMMAND>"-L"                   { return OPTION_L; }
 154 <COMMAND>"-Ttext"               {
 155                                  yylval.name = ".text";
 156                                  return OPTION_Texp;
 157                                 }
 158 <COMMAND>"-Tdata"               {
 159                                  yylval.name = ".data";
 160                                  return OPTION_Texp;
 161                                }
 162 <COMMAND>"-Tbss"                {
 163                                  yylval.name = ".bss";
 164                                  return OPTION_Texp;
 165                                }
 166 <COMMAND>"-O"([0-9])+           {
 167                                         yylval.integer = atoi (yytext + 2);
 168                                         return OPTION_Oval;
 169                                 }
 170 <COMMAND>"-O"{FILENAME}         {
 171                                 yylval.name = buystring(yytext+2);
 172                                 return OPTION_Texp;
 173                                 }
 174
 175 <COMMAND>"-T"{FILENAME}         {
 176                                  yylval.name = buystring(yytext+2);
 177                                  return OPTION_Tfile;
 178                                }
 179 <COMMAND>"-T"                   {
 180                                  return OPTION_T;
 181                                }
 182
 183 <COMMAND>"-F"{FILENAME}         {
 184                                  return OPTION_F;
 185                                }
 186 <COMMAND>"-F"                   {
 187                                  return OPTION_F;
 188                                }
 189
 190 <COMMAND>"-y"{FILENAME}         {
 191                                         yylval.name = buystring(yytext+2);
 192                                         return OPTION_y;
 193                                 }
 194
 195 <COMMAND>"-A"{FILENAME}         {
 196                                         yylval.name = buystring(yytext+2);
 197                                         return OPTION_Aarch;
 198                                 }
 199
 200 <COMMAND>"-retain-symbols-file" { return OPTION_RETAIN_SYMBOLS_FILE; }
 201
 202 <COMMAND>"-EB"                  {
 203                                         return OPTION_EB;
 204                                 }
 205 <COMMAND>"-EL"                  {
 206                                         return OPTION_EL;
 207                                 }
 208 <COMMAND>"-G"                   {
 209                                         return OPTION_G;
 210                                 }
 211 <COMMAND>"-G"([0-9])+           {
 212                                         yylval.integer = atoi (yytext + 2);
 213                                         return OPTION_Gval;
 214                                 }
 215
 216 <COMMAND>"-Qy"                  {       return OPTION_Qy; }
 217 <COMMAND>"-dn"                  {       return OPTION_dn; }
 218 <COMMAND>"-Y"                   {       return OPTION_Y;  }
 219 <COMMAND>"-YP,"{FILENAME}       {
 220                                         yylval.name = buystring (yytext+4);
 221                                         return OPTION_YP;
 222                                 }
 223 <COMMAND>"-non_shared"          {       return OPTION_non_shared; }
 224 <COMMAND>"-call_shared"         {       return OPTION_call_shared; }
 225
 226 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 227                                 yylval.integer = bfd_scan_vma (yytext+1, 0,16);
 228                                 return INT;
 229                         }
 230
 231 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|X|B|O|D) {
 232                                    int ibase ;
 233                                    switch (yytext[yyleng-1]) {
 234                                     case 'X':
 235                                     case 'H':
 236                                      ibase = 16;
 237                                      break;
 238                                     case 'O':
 239                                      ibase = 8;
 240                                      break;
 241                                     case 'B':
 242                                      ibase = 2;
 243                                      break;
 244                                     default:
 245                                      ibase = 10;
 246                                    }
 247                                    yylval.integer = bfd_scan_vma (yytext+1, 0,
 248                                                                   ibase);
 249                                    return INT;
 250                                  }
 251 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 252                                   yylval.integer = bfd_scan_vma (yytext, 0,
 253                                                                  hex_mode);
 254                                   if (yytext[yyleng-1]=='M'
 255                                         || yytext[yyleng-1] == 'm') {
 256                                       yylval.integer *= 1024*1024;
 257                                     }
 258                                   if (yytext[yyleng-1]=='K'
 259                                 || yytext[yyleng-1]=='k') {
 260                                       yylval.integer *= 1024;
 261                                     }
 262                                   return INT;
 263                                 }
 264 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 265 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 266 <BOTH,SCRIPT,EXPRESSION>"<<="   { RTOKEN(LSHIFTEQ);}
 267 <BOTH,SCRIPT,EXPRESSION>">>="   { RTOKEN(RSHIFTEQ);}
 268 <BOTH,SCRIPT,EXPRESSION>"||"    { RTOKEN(OROR);}
 269 <BOTH,SCRIPT,EXPRESSION>"=="    { RTOKEN(EQ);}
 270 <BOTH,SCRIPT,EXPRESSION>"!="    { RTOKEN(NE);}
 271 <BOTH,SCRIPT,EXPRESSION>">="    { RTOKEN(GE);}
 272 <BOTH,SCRIPT,EXPRESSION>"<="    { RTOKEN(LE);}
 273 <BOTH,SCRIPT,EXPRESSION>"<<"    { RTOKEN(LSHIFT);}
 274 <BOTH,SCRIPT,EXPRESSION>">>"    { RTOKEN(RSHIFT);}
 275 <BOTH,SCRIPT,EXPRESSION>"+="    { RTOKEN(PLUSEQ);}
 276 <BOTH,SCRIPT,EXPRESSION>"-="    { RTOKEN(MINUSEQ);}
 277 <BOTH,SCRIPT,EXPRESSION>"*="    { RTOKEN(MULTEQ);}
 278 <BOTH,SCRIPT,EXPRESSION>"/="    { RTOKEN(DIVEQ);}
 279 <BOTH,SCRIPT,EXPRESSION>"&="    { RTOKEN(ANDEQ);}
 280 <BOTH,SCRIPT,EXPRESSION>"|="    { RTOKEN(OREQ);}
 281 <BOTH,SCRIPT,EXPRESSION>"&&"    { RTOKEN(ANDAND);}
 282 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 283 <MRI,BOTH,SCRIPT,EXPRESSION>","         { RTOKEN(',');}
 284 <BOTH,SCRIPT,EXPRESSION>"&"             { RTOKEN('&');}
 285 <BOTH,SCRIPT,EXPRESSION>"|"             { RTOKEN('|');}
 286 <BOTH,SCRIPT,EXPRESSION>"~"             { RTOKEN('~');}
 287 <BOTH,SCRIPT,EXPRESSION>"!"             { RTOKEN('!');}
 288 <BOTH,SCRIPT,EXPRESSION>"?"             { RTOKEN('?');}
 289 <BOTH,SCRIPT,EXPRESSION>"*"             { RTOKEN('*');}
 290 <BOTH,SCRIPT,EXPRESSION>"+"             { RTOKEN('+');}
 291 <BOTH,SCRIPT,EXPRESSION>"-"             { RTOKEN('-');}
 292 <BOTH,SCRIPT,EXPRESSION>"/"             { RTOKEN('/');}
 293 <BOTH,SCRIPT,EXPRESSION>"%"             { RTOKEN('%');}
 294 <BOTH,SCRIPT,EXPRESSION>"<"             { RTOKEN('<');}
 295 <BOTH,SCRIPT,EXPRESSION>">"             { RTOKEN('>');}
 296 <MRI,BOTH,SCRIPT,EXPRESSION>"="          { RTOKEN('=');}
 297 <BOTH,SCRIPT,EXPRESSION>"}"                     { RTOKEN('}') ; }
 298 <BOTH,SCRIPT,EXPRESSION>"{"                     { RTOKEN('{'); }
 299 <BOTH,SCRIPT,EXPRESSION>")"                     { RTOKEN(')');}
 300 <BOTH,SCRIPT,EXPRESSION>"("                     { RTOKEN('(');}
 301 <BOTH,SCRIPT,EXPRESSION>"]"             { RTOKEN(']');}
 302 <BOTH,SCRIPT,EXPRESSION>"["             { RTOKEN('[');}
 303 <BOTH,SCRIPT,EXPRESSION>":"             { RTOKEN(':'); }
 304 <BOTH,SCRIPT,EXPRESSION>";"             { RTOKEN(';');}
 305 <BOTH,SCRIPT,EXPRESSION>"-"             { RTOKEN('-');}
 306 <BOTH,SCRIPT,EXPRESSION>"/"             { RTOKEN('/');}
 307 <BOTH,SCRIPT>"MEMORY"           { RTOKEN(MEMORY);}
 308 <BOTH,SCRIPT>"ORIGIN"           { RTOKEN(ORIGIN);}
 309 <BOTH,SCRIPT>"BLOCK"                    { RTOKEN(BLOCK);}
 310 <BOTH,SCRIPT>"LENGTH"           { RTOKEN(LENGTH);}
 311 <EXPRESSION,BOTH,SCRIPT>"ALIGN"                 { RTOKEN(ALIGN_K);}
 312 <EXPRESSION,BOTH,SCRIPT>"ADDR"                  { RTOKEN(ADDR);}
 313 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 314 <EXPRESSION,BOTH,SCRIPT>"NEXT"                  { RTOKEN(NEXT);}
 315 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 316 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 317 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 318 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"                { RTOKEN(SIZEOF);}
 319 <BOTH,SCRIPT>"TARGET"           { RTOKEN(TARGET_K);}
 320 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 321 <BOTH,SCRIPT>"OUTPUT"           { RTOKEN(OUTPUT);}
 322 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 323 <EXPRESSION,BOTH,SCRIPT>"DEFINED"               { RTOKEN(DEFINED);}
 324 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 325 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 326 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION" { RTOKEN(FORCE_COMMON_ALLOCATION);}
 327 <BOTH,SCRIPT>"SECTIONS"         { RTOKEN(SECTIONS);}
 328 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 329 <BOTH,SCRIPT>"STARTUP"          { RTOKEN(STARTUP);}
 330 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 331 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 332 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 333 <BOTH,SCRIPT>"SYSLIB"           { RTOKEN(SYSLIB);}
 334 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 335 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
 336 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 337 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 338 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 339 <BOTH,SCRIPT>"NOFLOAT"          { RTOKEN(NOFLOAT);}
 340 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"                { RTOKEN(NOLOAD);}
 341 <BOTH,SCRIPT>"DSECT"                    { RTOKEN(DSECT);}
 342 <BOTH,SCRIPT>"COPY"                     { RTOKEN(COPY);}
 343 <BOTH,SCRIPT>"INFO"                     { RTOKEN(INFO);}
 344 <BOTH,SCRIPT>"OVERLAY"          { RTOKEN(OVERLAY);}
 345 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 346 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 347 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 348 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 349 <BOTH,SCRIPT>"INCLUDE"                  { RTOKEN(INCLUDE);}
 350 <EXPRESSION,BOTH,SCRIPT>"AT"                    { RTOKEN(AT);}
 351 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 352 <MRI>"*".*                      { /* Mri comment line */ }
 353 <MRI>"END"                      { RTOKEN(ENDWORD); }
 354 <MRI>"ALIGNMOD"         { RTOKEN(ALIGNMOD);}
 355 <MRI>"ALIGN"            { RTOKEN(ALIGN_K);}
 356
 357 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 358 <MRI>"BASE"                     { RTOKEN(BASE); }
 359 <MRI>"ALIAS"                     { RTOKEN(ALIAS); }
 360 <MRI>"TRUNCATE"                     { RTOKEN(TRUNCATE); }
 361 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 362 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 363 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 364 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 365 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 366 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 367 <MRI>"SECT"                     { RTOKEN(SECT); }
 368 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 369 <MRI>"end"                      { RTOKEN(ENDWORD); }
 370 <MRI>"chip"                     { RTOKEN(CHIP); }
 371 <MRI>"load"                     { RTOKEN(LOAD); }
 372 <MRI>"order"                    { RTOKEN(ORDER); }
 373 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 374 <MRI>"format"                   { RTOKEN(FORMAT); }
 375 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 376 <MRI>"sect"                     { RTOKEN(SECT); }
 377 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 378
 379 <COMMAND>{CMDFILENAMECHAR1}{CMDFILENAMECHAR}*   {
 380                                  yylval.name = buystring(yytext);
 381                                   return NAME;
 382                                 }
 383
 384
 385 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 386 /* Filename without commas, needed to parse mri stuff */
 387                                  yylval.name = buystring(yytext);
 388                                   return NAME;
 389                                 }
 390
 391
 392 <BOTH,EXPRESSION>{FILENAMECHAR1}{FILENAMECHAR}* {
 393                                  yylval.name = buystring(yytext);
 394                                   return NAME;
 395                                 }
 396 <SCRIPT,COMMAND>{FILENAMECHAR}* { yylval.name = buystring(yytext);
 397                                   return NAME;
 398                                 }
 399
 400 <EXPRESSION,BOTH,COMMAND,SCRIPT>"\""[^\"]*"\"" {
 401                                         /* No matter the state, quotes
 402                                            give what's inside */
 403                                         yylval.name = buystring(yytext+1);
 404                                         yylval.name[yyleng-2] = 0;
 405                                         return NAME;
 406                                 }
 407 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 408 <MRI,COMMAND,BOTH,SCRIPT,EXPRESSION>[ \t]
 409
 410 <<EOF>> {
 411   include_stack_ptr--;
 412
 413   if (include_stack_ptr == 0)
 414   {
 415     yyterminate();
 416   }
 417   else
 418   {
 419     yy_switch_to_buffer(include_stack[include_stack_ptr]);
 420
 421   }
 422   if (include_stack_ptr==1)
 423   {
 424     BEGIN(COMMAND);
 425   }
 426   else
 427   {
 428     BEGIN(SCRIPT);
 429     ldfile_input_filename = file_name_stack[include_stack_ptr-1];
 430   }
 431
 432   return END;
 433 }
 434
 435 %%
 436
 437 void
 438 lex_push_file (file, name)
 439      FILE *file;
 440      char *name;
 441 {
 442   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 443   {
 444     einfo("%F:includes nested too deeply\n");
 445   }
 446   file_name_stack[include_stack_ptr] = name;
 447   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 448
 449   include_stack_ptr++;
 450   yyin = file;
 451   yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
 452
 453   BEGIN(SCRIPT);
 454 }
 455
 456 static YY_BUFFER_STATE
 457 yy_create_string_buffer (string,  size)
 458      CONST char *string;
 459      int size;
 460 {
 461   YY_BUFFER_STATE b;
 462
 463   b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) );
 464   b->yy_input_file = 0;
 465
 466   if ( ! b )
 467    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 468
 469   b->yy_buf_size = size;
 470
 471   /* yy_ch_buf has to be 2 characters longer than the size given because
 472    * we need to put in 2 end-of-buffer characters.
 473    */
 474   b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 3) );
 475
 476   if ( ! b->yy_ch_buf )
 477    YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
 478
 479
 480   b->yy_ch_buf[0] = '\n';
 481   strcpy(b->yy_ch_buf+1,  string);
 482   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 483   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 484     b->yy_n_chars = size+1;
 485   b->yy_buf_pos = &b->yy_ch_buf[1];
 486
 487   b->yy_eof_status = EOF_NOT_SEEN;
 488
 489   return ( b );
 490 }
 491
 492
 493
 494 void
 495 lex_redirect (string)
 496      CONST  char *string;
 497 {
 498   YY_BUFFER_STATE tmp;
 499
 500   int len = strlen(string);
 501   yy_init = 0  ;
 502   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 503   {
 504     einfo("%F: macros nested too deeply\n");
 505   }
 506   file_name_stack[include_stack_ptr] = "redirect";
 507   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 508   include_stack_ptr++;
 509   tmp =   yy_create_string_buffer(string, len);
 510
 511   yy_switch_to_buffer(tmp);
 512   BEGIN(COMMAND);
 513   yyout = stdout;
 514 }
 515
 516 int state_stack[20];
 517 int *state_stack_p = state_stack;
 518
 519 void
 520 ldlex_script ()
 521 {
 522   *(state_stack_p)++ = yy_start;
 523
 524   BEGIN(SCRIPT);
 525 }
 526
 527
 528 void
 529 ldlex_mri_script ()
 530 {
 531   *(state_stack_p)++ = yy_start;
 532   BEGIN(MRI);
 533 }
 534
 535 void
 536 ldlex_defsym ()
 537 {
 538   *(state_stack_p)++ = yy_start;
 539   BEGIN(DEFSYMEXP);
 540 }
 541
 542 void
 543 ldlex_expression ()
 544 {
 545   *(state_stack_p)++ = yy_start;
 546   BEGIN(EXPRESSION);
 547
 548 }
 549 void
 550 ldlex_both ()
 551 {
 552   *(state_stack_p)++ = yy_start;
 553   BEGIN(BOTH);
 554 }
 555 void
 556 ldlex_command ()
 557 {
 558   *(state_stack_p)++ = yy_start;
 559   BEGIN(COMMAND);
 560 }
 561
 562 void
 563 ldlex_popstate ()
 564 {
 565   yy_start = *(--state_stack_p);
 566 }
 567
 568 static void
 569 yy_input(buf, result, max_size)
 570 char *buf;
 571 int *result;
 572 int max_size;
 573 {
 574   *result = 0;
 575   if (yy_current_buffer->yy_input_file)
 576   {
 577     if (yyin)
 578      if ( (*result = read( fileno(yyin), (char *) buf, max_size )) < 0 )
 579       YY_FATAL_ERROR( "read() in flex scanner failed" );
 580   }
 581 }
 582
 583 static void
 584 comment ()
 585 {
 586   int c;
 587   while (1)
 588   {
 589     c = input();
 590     while (c !='*' && c != EOF)
 591     {
 592       if (c == '\n') lineno++;
 593       c = input();
 594     }
 595
 596
 597     if (c == '*')
 598     {
 599       c = input();
 600       while ( c == '*')
 601        c = input();
 602       if ( c == '/' )
 603        break;                   /* found the end */
 604     }
 605
 606     if ( c == EOF )
 607     {
 608       einfo( "%F%P :EOF in comment\n");
 609       break;
 610     }
 611   }
 612 }