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