libguile/__scm.h

   1 /* classes: h_files */
   2
   3 #ifndef __SCMH
   4 #define __SCMH
   5 /* Copyright (C) 1995,1996,1998,1999,2000,2001 Free Software Foundation, Inc.
   6  *
   7  * This program 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  * This program 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 this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.  */
  45 \f
  46
  47 /* "What's the difference between _scm.h and __scm.h?"
  48
  49    _scm.h is not installed; it's only visible to the libguile sources
  50    themselves.
  51
  52    __scm.h is installed, and is #included by <libguile.h>.  If both
  53    the client and libguile need some piece of information, and it
  54    doesn't fit well into the header file for any particular module, it
  55    should go in __scm.h.  */
  56
  57
  58 /* {Supported Options}
  59  *
  60  * These may be defined or undefined.
  61  */
  62
  63 /* Old async mechanism */
  64 /* #define GUILE_OLD_ASYNC_CLICK */
  65
  66 /* #define GUILE_DEBUG_FREELIST */
  67
  68 /* If the compile FLAG `SCM_CAUTIOUS' is #defined then the number of
  69  * arguments is always checked for application of closures.  If the
  70  * compile FLAG `SCM_RECKLESS' is #defined then they are not checked.
  71  * Otherwise, number of argument checks for closures are made only when
  72  * the function position (whose value is the closure) of a combination is
  73  * not an ILOC or GLOC.  When the function position of a combination is a
  74  * symbol it will be checked only the first time it is evaluated because
  75  * it will then be replaced with an ILOC or GLOC.
  76  */
  77 #undef SCM_RECKLESS
  78 #define SCM_CAUTIOUS
  79
  80 /* After looking up a local for the first time, rewrite the
  81  * code graph, caching its position.
  82  */
  83 #define MEMOIZE_LOCALS
  84
  85 /* All the number support there is.
  86  */
  87 #define BIGNUMS
  88
  89 /* GC should relinquish empty cons-pair arenas. */
  90 /* cmm:FIXME look at this after done mangling the GC */
  91 /* #define GC_FREE_SEGMENTS */
  92
  93 /* Provide a scheme-accessible count-down timer that
  94  * generates a pseudo-interrupt.
  95  */
  96 #define TICKS
  97
  98
  99 /* Use engineering notation when converting numbers strings?
 100  */
 101 #undef ENGNOT
 102
 103 \f
 104 /* {Unsupported Options}
 105  *
 106  * These must be defined as given here.
 107  */
 108
 109
 110 #define CCLO
 111
 112 /* Guile Scheme supports the #f/() distinction; Guile Lisp won't.  We
 113    have horrible plans for their unification.  */
 114 #undef SICP
 115
 116 \f
 117
 118 /* Random options (not yet supported or in final form). */
 119
 120 #define STACK_CHECKING
 121 #undef NO_CEVAL_STACK_CHECKING
 122
 123 \f
 124
 125 /* What did the configure script discover about the outside world?  */
 126 #include "libguile/scmconfig.h"
 127
 128 \f
 129
 130 /* {Debugging Options}
 131  *
 132  * These compile time options determine whether to include code that is only
 133  * useful for debugging guile itself or C level extensions to guile.  The
 134  * common prefix for all option macros of this kind is "SCM_DEBUG_".  It is
 135  * guaranteed that a macro named SCM_DEBUG_XXX is defined to be either 0 or 1,
 136  * i. e. there is no need to test for the undefined case.  This allows to use
 137  * these definitions comfortably in macro code, as in the following example:
 138  *   #define FOO do { if (SCM_DEBUG_XXX) bar(); else baz(); } while (0)
 139  * Any sane compiler will remove the unused branch without any performance
 140  * penalty for the resulting code.
 141  *
 142  * Note:  Some SCM_DEBUG_XXX options are not settable at configure time.
 143  * To change the value of such options you will have to edit this header
 144  * file or give suitable options to make, like:
 145  *   make all CFLAGS="-DSCM_DEBUG_XXX=1 ..."
 146  */
 147
 148
 149 /* The value of SCM_DEBUG determines the default for most of the not yet
 150  * defined debugging options.  This allows, for example, to enable most of the
 151  * debugging options by simply defining SCM_DEBUG as 1.
 152  */
 153 #ifndef SCM_DEBUG
 154 #define SCM_DEBUG 0
 155 #endif
 156
 157 /* If SCM_DEBUG_CELL_ACCESSES is set to 1, cell accesses will perform
 158  * exhaustive parameter checking:  It will be verified that cell parameters
 159  * actually point to a valid heap cell.  Note:  If this option is enabled,
 160  * guile will run about ten times slower than normally.
 161  */
 162 #ifndef SCM_DEBUG_CELL_ACCESSES
 163 #define SCM_DEBUG_CELL_ACCESSES SCM_DEBUG
 164 #endif
 165
 166 /* If SCM_DEBUG_DEPRECATED is set to 1, deprecated code is not compiled.  This
 167  * can be used by developers to get rid of references to deprecated code.
 168  */
 169 #ifndef SCM_DEBUG_DEPRECATED
 170 #define SCM_DEBUG_DEPRECATED SCM_DEBUG
 171 #endif
 172
 173 /* If SCM_DEBUG_INTERRUPTS is set to 1, with every deferring and allowing of
 174  * interrupts a consistency check will be performed.
 175  */
 176 #ifndef SCM_DEBUG_INTERRUPTS
 177 #define SCM_DEBUG_INTERRUPTS SCM_DEBUG
 178 #endif
 179
 180 /* If SCM_DEBUG_REST_ARGUMENT is set to 1, functions that take rest arguments
 181  * will check whether the rest arguments are actually passed as a proper list.
 182  * Otherwise, if SCM_DEBUG_REST_ARGUMENT is 0, functions that take rest
 183  * arguments will take it for granted that these are passed as a proper list.
 184  */
 185 #ifndef SCM_DEBUG_REST_ARGUMENT
 186 #define SCM_DEBUG_REST_ARGUMENT SCM_DEBUG
 187 #endif
 188
 189 /* Use this for _compile time_ type checking only, since the compiled result
 190  * will be quite inefficient.  The right way to make use of this option is to
 191  * do a 'make clean; make CFLAGS=-DSCM_DEBUG_TYPING_STRICTNESS=1', fix your
 192  * errors, and then do 'make clean; make'.
 193  */
 194 #ifndef SCM_DEBUG_TYPING_STRICTNESS
 195 #define SCM_DEBUG_TYPING_STRICTNESS 0
 196 #endif
 197
 198 \f
 199
 200 #ifdef HAVE_LONG_LONGS
 201
 202 /* Some auto-generated .h files contain unused prototypes
 203  * that need these typedefs.
 204  */
 205 typedef long long long_long;
 206 typedef unsigned long long ulong_long;
 207
 208 #endif /* HAVE_LONG_LONGS */
 209
 210 \f
 211
 212 /* {Architecture and compiler properties}
 213  *
 214  * Guile as of today can only work on systems which fulfill at least the
 215  * following requirements:
 216  * - long ints have at least 32 bits.
 217  *   Guile's type system is based on this assumption.
 218  * - long ints consist of at least four characters.
 219  *   It is assumed that cells, i. e. pairs of long ints, are eight character
 220  *   aligned, because three bits of a cell pointer are used for type data.
 221  * - sizeof (void*) == sizeof (long int)
 222  *   Pointers are stored in SCM objects, and sometimes SCM objects are passed
 223  *   as void*.  Thus, there has to be a one-to-one correspondence.
 224  * - numbers are encoded using two's complement.
 225  *   The implementation of the bitwise scheme level operations is based on
 226  *   this assumption.
 227  * - ... add more
 228  */
 229
 230 #ifdef HAVE_LIMITS_H
 231 # include <limits.h>
 232 #endif
 233
 234 #ifdef CHAR_BIT
 235 # define SCM_CHAR_BIT CHAR_BIT
 236 #else
 237 # define SCM_CHAR_BIT 8
 238 #endif
 239
 240 #ifdef LONG_BIT
 241 # define SCM_LONG_BIT LONG_BIT
 242 #else
 243 # define SCM_LONG_BIT (SCM_CHAR_BIT * sizeof (long) / sizeof (char))
 244 #endif
 245
 246 #ifdef UCHAR_MAX
 247 # define SCM_CHAR_CODE_LIMIT (UCHAR_MAX + 1L)
 248 #else
 249 # define SCM_CHAR_CODE_LIMIT 256L
 250 #endif
 251
 252 \f
 253
 254 #ifdef STDC_HEADERS
 255 # include <stdlib.h>
 256 # ifdef AMIGA
 257 #  include <stddef.h>
 258 # endif /* def AMIGA */
 259 # define scm_sizet size_t
 260 #else
 261 # ifdef _SIZE_T
 262 #  define scm_sizet size_t
 263 # else
 264 #  define scm_sizet unsigned int
 265 # endif /* def _SIZE_T */
 266 #endif /* def STDC_HEADERS */
 267
 268 \f
 269
 270 #include "libguile/tags.h"
 271
 272 \f
 273 #ifdef vms
 274 # ifndef CHEAP_CONTINUATIONS
 275    typedef int jmp_buf[17];
 276    extern int setjump(jmp_buf env);
 277    extern int longjump(jmp_buf env, int ret);
 278 #  define setjmp setjump
 279 #  define longjmp longjump
 280 # else
 281 #  include <setjmp.h>
 282 # endif
 283 #else                           /* ndef vms */
 284 # ifdef _CRAY1
 285     typedef int jmp_buf[112];
 286     extern int setjump(jmp_buf env);
 287     extern int longjump(jmp_buf env, int ret);
 288 #  define setjmp setjump
 289 #  define longjmp longjump
 290 # else                          /* ndef _CRAY1 */
 291 #  include <setjmp.h>
 292 # endif                         /* ndef _CRAY1 */
 293 #endif                          /* ndef vms */
 294
 295 /* James Clark came up with this neat one instruction fix for
 296  * continuations on the SPARC.  It flushes the register windows so
 297  * that all the state of the process is contained in the stack.
 298  */
 299
 300 #ifdef sparc
 301 # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3")
 302 #else
 303 # define SCM_FLUSH_REGISTER_WINDOWS /* empty */
 304 #endif
 305
 306 /* If stack is not longword aligned then
 307  */
 308
 309 /* #define SHORT_ALIGN */
 310 #ifdef THINK_C
 311 # define SHORT_ALIGN
 312 #endif
 313 #ifdef MSDOS
 314 # define SHORT_ALIGN
 315 #endif
 316 #ifdef atarist
 317 # define SHORT_ALIGN
 318 #endif
 319
 320 #ifdef SHORT_ALIGN
 321 typedef short SCM_STACKITEM;
 322 #else
 323 typedef long SCM_STACKITEM;
 324 #endif
 325 \f
 326
 327 #ifndef USE_THREADS
 328 #define SCM_CRITICAL_SECTION_START
 329 #define SCM_CRITICAL_SECTION_END
 330 #define SCM_THREAD_SWITCHING_CODE
 331 #endif
 332
 333 #ifdef GUILE_OLD_ASYNC_CLICK
 334 extern unsigned int scm_async_clock;
 335
 336 #define SCM_ASYNC_TICK \
 337 do { \
 338   if (0 == --scm_async_clock) \
 339     scm_async_click (); \
 340 } while(0)
 341 #else
 342 extern int scm_asyncs_pending_p;
 343
 344 #define SCM_ASYNC_TICK /*fixme* should change names */ \
 345 do { \
 346   if (scm_asyncs_pending_p) \
 347     scm_async_click (); \
 348 } while (0)
 349 #endif
 350
 351 #if (SCM_DEBUG_INTERRUPTS == 1)
 352 #include <stdio.h>
 353 #define SCM_CHECK_NOT_DISABLED \
 354   do { \
 355     if (scm_ints_disabled) \
 356       fprintf(stderr, "ints already disabled (at %s:%d)\n", \
 357               __FILE__, __LINE__); \
 358   } while (0)
 359
 360 #define SCM_CHECK_NOT_ENABLED \
 361   do { \
 362     if (!scm_ints_disabled) \
 363       fprintf(stderr, "ints already enabled (at %s:%d)\n", \
 364               __FILE__, __LINE__); \
 365   } while (0)
 366
 367 #else
 368 #define SCM_CHECK_NOT_DISABLED
 369 #define SCM_CHECK_NOT_ENABLED
 370 #endif
 371
 372
 373 /* Anthony Green writes:
 374    When the compiler sees...
 375            DEFER_INTS;
 376            [critical code here]
 377            ALLOW_INTS;
 378    ...it doesn't actually promise to keep the critical code within the
 379    boundries of the DEFER/ALLOW_INTS instructions. It may very well
 380    schedule it outside of the magic defined in those macros.
 381
 382    However, GCC's volatile asm feature forms a barrier over which code is
 383    never moved. So if you add...
 384            asm ("");
 385    ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical
 386    code will always remain in place.  asm's without inputs or outputs
 387    are implicitly volatile. */
 388 #ifdef __GNUC__
 389 #define SCM_FENCE asm /* volatile */ ("")
 390 #else
 391 #define SCM_FENCE
 392 #endif
 393
 394 #define SCM_DEFER_INTS \
 395 do { \
 396   SCM_FENCE; \
 397   SCM_CHECK_NOT_DISABLED; \
 398   SCM_CRITICAL_SECTION_START; \
 399   SCM_FENCE; \
 400   scm_ints_disabled = 1; \
 401   SCM_FENCE; \
 402 } while (0)
 403
 404
 405 #define SCM_ALLOW_INTS_ONLY \
 406 do { \
 407   SCM_CRITICAL_SECTION_END; \
 408   scm_ints_disabled = 0; \
 409 } while (0)
 410
 411
 412 #define SCM_ALLOW_INTS \
 413 do { \
 414   SCM_FENCE; \
 415   SCM_CHECK_NOT_ENABLED; \
 416   SCM_CRITICAL_SECTION_END; \
 417   SCM_FENCE; \
 418   scm_ints_disabled = 0; \
 419   SCM_FENCE; \
 420   SCM_THREAD_SWITCHING_CODE; \
 421   SCM_FENCE; \
 422 } while (0)
 423
 424
 425 #define SCM_REDEFER_INTS  \
 426 do { \
 427   SCM_FENCE; \
 428   SCM_CRITICAL_SECTION_START; \
 429   ++scm_ints_disabled; \
 430   SCM_FENCE; \
 431 } while (0)
 432
 433
 434 #define SCM_REALLOW_INTS \
 435 do { \
 436   SCM_FENCE; \
 437   SCM_CRITICAL_SECTION_END; \
 438   SCM_FENCE; \
 439   --scm_ints_disabled; \
 440   SCM_FENCE; \
 441 } while (0)
 442
 443
 444 #define SCM_TICK \
 445 do { \
 446   SCM_ASYNC_TICK; \
 447   SCM_THREAD_SWITCHING_CODE; \
 448 } while (0)
 449
 450 \f
 451
 452 /* Classification of critical sections
 453  *
 454  * When Guile moves to POSIX threads, it won't be possible to prevent
 455  * context switching.  In fact, the whole idea of context switching is
 456  * bogus if threads are run by different processors.  Therefore, we
 457  * must ultimately eliminate all critical sections or enforce them by
 458  * use of mutecis.
 459  *
 460  * All instances of SCM_DEFER_INTS and SCM_ALLOW_INTS should therefore
 461  * be classified and replaced by one of the delimiters below.  If you
 462  * understand what this is all about, I'd like to encourage you to
 463  * help with this task.  The set of classes below must of course be
 464  * incrementally augmented.
 465  *
 466  * MDJ 980419 <djurfeldt@nada.kth.se>
 467  */
 468
 469 /* A sections
 470  *
 471  * Allocation of a cell with type tag in the CAR.
 472  *
 473  * With POSIX threads, each thread will have a private pool of free
 474  * cells.  Therefore, this type of section can be removed.  But!  It
 475  * is important that the CDR is initialized first (with the CAR still
 476  * indicating a free cell) so that we can guarantee a consistent heap
 477  * at all times.
 478  */
 479
 480 #define SCM_ENTER_A_SECTION SCM_CRITICAL_SECTION_START
 481 #define SCM_EXIT_A_SECTION SCM_CRITICAL_SECTION_END
 482
 483 \f
 484
 485 /** SCM_ASSERT
 486  **
 487  **/
 488
 489
 490 #ifdef SCM_RECKLESS
 491 #define SCM_ASSERT(_cond, _arg, _pos, _subr)
 492 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg)
 493 #define SCM_ASRTGO(_cond, _label)
 494 #else
 495 #define SCM_ASSERT(_cond, _arg, _pos, _subr) \
 496         if (!(_cond)) \
 497           scm_wrong_type_arg (_subr, _pos, _arg)
 498 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \
 499         if (!(_cond)) \
 500           scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg)
 501 #define SCM_ASRTGO(_cond, _label) \
 502         if (!(_cond)) \
 503           goto _label
 504 #endif
 505
 506 /*
 507  * SCM_WTA_DISPATCH
 508  */
 509
 510 /* Dirk:FIXME:: In all of the SCM_WTA_DISPATCH_* macros it is assumed that
 511  * 'gf' is zero if uninitialized.  It would be cleaner if some valid SCM value
 512  * like SCM_BOOL_F or SCM_UNDEFINED was chosen.
 513  */
 514
 515 extern SCM scm_call_generic_0 (SCM gf);
 516
 517 #define SCM_WTA_DISPATCH_0(gf, subr)                            \
 518   return (SCM_UNPACK (gf)                                       \
 519           ? scm_call_generic_0 ((gf))                           \
 520           : (scm_error_num_args_subr ((subr)), SCM_UNSPECIFIED))
 521 #define SCM_GASSERT0(cond, gf, subr) \
 522   if (!(cond)) SCM_WTA_DISPATCH_0((gf), (subr))
 523
 524 extern SCM scm_call_generic_1 (SCM gf, SCM a1);
 525
 526 #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr)                   \
 527   return (SCM_UNPACK (gf)                                       \
 528           ? scm_call_generic_1 ((gf), (a1))                     \
 529           : (scm_wrong_type_arg ((subr), (pos), (a1)), SCM_UNSPECIFIED))
 530 #define SCM_GASSERT1(cond, gf, a1, pos, subr) \
 531   if (!(cond)) SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr))
 532
 533 extern SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2);
 534
 535 #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr)                       \
 536   return (SCM_UNPACK (gf)                                               \
 537           ? scm_call_generic_2 ((gf), (a1), (a2))                       \
 538           : (scm_wrong_type_arg ((subr), (pos),                         \
 539                                  (pos) == SCM_ARG1 ? (a1) : (a2)),      \
 540              SCM_UNSPECIFIED))
 541 #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \
 542   if (!(cond)) SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr))
 543
 544 extern SCM scm_apply_generic (SCM gf, SCM args);
 545
 546 #define SCM_WTA_DISPATCH_n(gf, args, pos, subr)                           \
 547   return (SCM_UNPACK (gf)                                                 \
 548           ? scm_apply_generic ((gf), (args))                              \
 549           : (scm_wrong_type_arg ((subr), (pos),                           \
 550                                  scm_list_ref ((args),                    \
 551                                                SCM_MAKINUM ((pos) - 1))), \
 552              SCM_UNSPECIFIED))
 553 #define SCM_GASSERTn(cond, gf, args, pos, subr) \
 554   if (!(cond)) SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr))
 555
 556 #ifndef SCM_MAGIC_SNARFER
 557 /* Let these macros pass through if
 558    we are snarfing;  thus we can tell the
 559    difference between the use of an actual
 560    number vs. the use of one of these macros --
 561    actual numbers in SCM_VALIDATE_* and SCM_ASSERT
 562    constructs must match the formal argument name,
 563    but using SCM_ARG* avoids the test */
 564
 565 #define SCM_ARGn                0
 566 #define SCM_ARG1                1
 567 #define SCM_ARG2                2
 568 #define SCM_ARG3                3
 569 #define SCM_ARG4                4
 570 #define SCM_ARG5                5
 571 #define SCM_ARG6                6
 572 #define SCM_ARG7                7
 573
 574 #if (SCM_DEBUG_DEPRECATED == 0)
 575
 576 /* Use SCM_WRONG_NUM_ARGS instead of: */
 577 #define SCM_WNA                 8
 578
 579 /* Use SCM_ASSERT_RANGE or SCM_VALIDATE_XXX_RANGE instead of: */
 580 #define SCM_OUTOFRANGE         10
 581
 582 /* Use scm_memory_error instead of: */
 583 #define SCM_NALLOC             11
 584
 585 #define SCM_HUP_SIGNAL         14
 586 #define SCM_INT_SIGNAL         15
 587 #define SCM_FPE_SIGNAL         16
 588 #define SCM_BUS_SIGNAL         17
 589 #define SCM_SEGV_SIGNAL        18
 590 #define SCM_ALRM_SIGNAL        19
 591 #define SCM_GC_SIGNAL          20
 592 #define SCM_TICK_SIGNAL        21
 593 #define SCM_SIG_ORD(X)         ((X) - SCM_HUP_SIGNAL)
 594 #define SCM_ORD_SIG(X)         ((X) + SCM_HUP_SIGNAL)
 595 #define SCM_NUM_SIGS           (SCM_SIG_ORD (SCM_TICK_SIGNAL) + 1)
 596
 597 #endif  /* SCM_DEBUG_DEPRECATED == 0 */
 598
 599 #endif /* SCM_MAGIC_SNARFER */
 600
 601 \f
 602
 603 /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors
 604  * were encountered.  SCM_EXIT_FAILURE is the default code to return from
 605  * SCM if errors were encountered.  The return code can be explicitly
 606  * specified in a SCM program with (scm_quit <n>).
 607  */
 608
 609 #ifndef SCM_EXIT_SUCCESS
 610 #ifdef vms
 611 #define SCM_EXIT_SUCCESS 1
 612 #else
 613 #define SCM_EXIT_SUCCESS 0
 614 #endif /* def vms */
 615 #endif /* ndef SCM_EXIT_SUCCESS */
 616 #ifndef SCM_EXIT_FAILURE
 617 #ifdef vms
 618 #define SCM_EXIT_FAILURE 2
 619 #else
 620 #define SCM_EXIT_FAILURE 1
 621 #endif /* def vms */
 622 #endif /* ndef SCM_EXIT_FAILURE */
 623
 624 \f
 625
 626 #endif  /* __SCMH */
 627
 628 /*
 629   Local Variables:
 630   c-file-style: "gnu"
 631   End:
 632 */