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56a3dcd431
The intent is to allow compilation with `-Wundef', which in turn should make it easier to catch erroneous uses of nonexistent macros. * libguile/__scm.h: Don't assume `BUILDING_LIBGUILE' is defined. * libguile/conv-uinteger.i.c (SCM_TO_TYPE_PROTO): Remove unneeded CPP conditional on `TYPE_MIN == 0'. * libguile/fports.c: Check for the definition of `HAVE_CHSIZE' and `HAVE_FTRUNCATE', not for their value. * libguile/ports.c: Likewise. * libguile/numbers.c (guile_ieee_init): Likewise with `HAVE_DINFINITY' and `HAVE_DQNAN'. * test-suite/standalone/test-conversion.c (ieee_init): Likewise. * libguile/strings.c: Likewise with `SCM_STRING_LENGTH_HISTOGRAM'. * libguile/strings.h: Likewise. * libguile/tags.h: Likewise with `HAVE_INTTYPES_H' and `HAVE_STDINT_H'. * libguile/threads.c: Likewise with `HAVE_PTHREAD_GET_STACKADDR_NP'. * libguile/vm-engine.c (VM_NAME): Likewise with `VM_CHECK_IP'. * libguile/gen-scmconfig.c (main): Use "#ifdef HAVE_", not "#if HAVE_". * libguile/socket.c (scm_setsockopt): Likewise.
121 lines
3 KiB
C
121 lines
3 KiB
C
/* This code in included by number.s.c to generate integer conversion
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functions like scm_to_int and scm_from_int. It is only for
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unsigned types, see conv-integer.i.c for the signed variant.
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*/
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/* You need to define the following macros before including this
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template. They are undefined at the end of this file to giove a
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clean slate for the next inclusion.
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TYPE - the integral type to be converted
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TYPE_MIN - the smallest representable number of TYPE, typically 0.
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TYPE_MAX - the largest representable number of TYPE
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SIZEOF_TYPE - the size of TYPE, equal to "sizeof (TYPE)" but
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in a form that can be computed by the preprocessor.
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When this number is 0, the preprocessor is not used
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to select which code to compile; the most general
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code is always used.
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SCM_TO_TYPE_PROTO(arg), SCM_FROM_TYPE_PROTO(arg)
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- These two macros should expand into the prototype
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for the two defined functions, without the return
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type.
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*/
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TYPE
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SCM_TO_TYPE_PROTO (SCM val)
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{
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if (SCM_I_INUMP (val))
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{
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scm_t_signed_bits n = SCM_I_INUM (val);
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if (n >= 0
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&& ((scm_t_uintmax)n) >= TYPE_MIN && ((scm_t_uintmax)n) <= TYPE_MAX)
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return n;
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else
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{
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out_of_range:
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scm_i_range_error (val,
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scm_from_unsigned_integer (TYPE_MIN),
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scm_from_unsigned_integer (TYPE_MAX));
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return 0;
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}
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}
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else if (SCM_BIGP (val))
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{
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if (TYPE_MAX <= SCM_MOST_POSITIVE_FIXNUM)
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goto out_of_range;
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else if (TYPE_MAX <= ULONG_MAX)
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{
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if (mpz_fits_ulong_p (SCM_I_BIG_MPZ (val)))
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{
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unsigned long n = mpz_get_ui (SCM_I_BIG_MPZ (val));
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#if SIZEOF_TYPE != 0 && SIZEOF_TYPE > SCM_SIZEOF_LONG
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return n;
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#else
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if (n >= TYPE_MIN && n <= TYPE_MAX)
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return n;
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else
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goto out_of_range;
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#endif
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}
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else
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goto out_of_range;
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}
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else
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{
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scm_t_uintmax n;
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size_t count;
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if (mpz_sgn (SCM_I_BIG_MPZ (val)) < 0)
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goto out_of_range;
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if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2)
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> CHAR_BIT*sizeof (TYPE))
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goto out_of_range;
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mpz_export (&n, &count, 1, sizeof (TYPE), 0, 0, SCM_I_BIG_MPZ (val));
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if (n >= TYPE_MIN && n <= TYPE_MAX)
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return n;
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else
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goto out_of_range;
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}
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}
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else
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{
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scm_wrong_type_arg_msg (NULL, 0, val, "exact integer");
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return 0;
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}
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}
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SCM
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SCM_FROM_TYPE_PROTO (TYPE val)
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{
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#if SIZEOF_TYPE != 0 && SIZEOF_TYPE < SIZEOF_SCM_T_BITS
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return SCM_I_MAKINUM (val);
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#else
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if (SCM_POSFIXABLE (val))
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return SCM_I_MAKINUM (val);
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else if (val <= ULONG_MAX)
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return scm_i_ulong2big (val);
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else
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{
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SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0);
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mpz_init (SCM_I_BIG_MPZ (z));
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mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (TYPE), 0, 0, &val);
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return z;
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}
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#endif
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}
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#undef TYPE
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#undef TYPE_MIN
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#undef TYPE_MAX
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#undef SIZEOF_TYPE
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#undef SCM_TO_TYPE_PROTO
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#undef SCM_FROM_TYPE_PROTO
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