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