* libguile/numbers.c (log_of_shifted_double, log_of_exact_integer,
log_of_exact_integer_with_size, log_of_fraction): New internal static
functions used by scm_log and scm_log10.
(scm_log, scm_log10): Robustly handle large integers, large and small
fractions, and fractions close to 1. Previously, computing logarithms
of fractions close to 1 yielded grossly inaccurate results, and the
other cases yielded infinities even though the answer could easily fit
in a double. (log -0.0) now returns -inf.0+<PI>i, where previously it
returned -inf.0. (log 0) now throws a numerical overflow exception,
where previously it returned -inf.0. (log 0.0) still returns -inf.0.
Analogous changes made to `log10'.
* test-suite/tests/numbers.test (log, log10): Add tests.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* libguile/numbers.c (scm_c_truncate): Use ceil (x) instead of
-floor (-x).
(scm_truncate_number): Implement directly instead of by checking the
sign and using scm_floor or scm_ceiling. Use scm_truncate_quotient
for fractions. Make extensible, so that new number types implemented
in GOOPS will be able to do the job more efficiently, since it is
often easier to implement truncate than floor or ceiling.
(scm_round_number): Optimize fractions case by using
scm_round_quotient. Make extensible, so that new number types
implemented in GOOPS will be able to do the job efficiently.
(scm_floor, scm_ceiling): Optimize fractions case by using
scm_floor_quotient and scm_ceiling_quotient, respectively.
* test-suite/tests/numbers.test: Add test cases.
* module/ice-9/boot-9.scm (the-scm-module): Make it its own public
interface.
* test-suite/tests/modules.test ("foundations")["the-root-module",
"the-scm-module"]: New tests.
* libguile/numbers.c (scm_euclidean_quotient, scm_euclidean_divide,
scm_centered_quotient, scm_centered_divide): Fix bug in inum/inum
case, where (quotient most-negative-fixnum -1) would not be converted
to a bignum.
(scm_euclidean_quotient): Be more anal-retentive about calling
scm_remember_upto_here_1 after mpz_sgn, (even though mpz_sgn is
documented as being implemented as a macro and certainly won't
do any allocation). It's better to be safe than sorry here.
(scm_euclidean_quotient, scm_centered_quotient): In the bignum/inum
case, check if the divisor is 1, since this will allow us to avoid
allocating a new bignum.
(scm_euclidean_divide, scm_centered_quotient, scm_centered_divide):
When computing the intermediate truncated quotient (xx / yy) and
remainder, use (xx % yy) instead of (xx - qq * yy), on the theory that
the compiler is more likely to handle this case intelligently and
maybe combine the operations.
(scm_euclidean_divide): In the bignum/inum case, we know that the
remainder will fit in an fixnum, so don't bother allocating a bignum
for it.
(scm_euclidean_quotient, scm_euclidean_remainder,
scm_euclidean_divide, scm_centered_quotient, scm_centered_remainder,
scm_centered_divide): Minor stylistic changes.
* test-suite/tests/numbers.test: Rework testing framework for
number-theoretic division operators to be more efficient and
comprehensive in its testing of code paths and problem cases.
* module/ice-9/getopt-long.scm (fatal-error): New helper. For errors
that come from the user -- i.e., not the grammar -- we will handle our
own error printing and call `exit' rather than relying on the root
catch handler. This is more friendly to the user than a Scheme
backtrace.
(parse-option-spec, process-options, getopt-long): Call `fatal-error'
as appropriate.
* test-suite/tests/getopt-long.test (pass-if-fatal-exception): New
helper, checks that a certain key was thrown to, and that suitable
output has been printed on an error port.
(deferr): Change to expect a 'quit key instead of 'misc-error. Update
exceptions to not match the beginning of the string, as that will be
the program name. Update tests to use pass-if-fatal-exception.
* libguile/foreign.c (unpack): Make sure X is a pointer before using
`SCM_POINTER_VALUE'.
* test-suite/tests/foreign.test ("pointer->procedure"): New test prefix.
* module/ice-9/format.scm (format): When DESTINATION is #f, use a
Unicode-capable output string port.
* test-suite/tests/format.test ("format basic output")["default to
Unicode-capable port"]: New test.
When parsing non-real complex numbers, apply exactness specifiers on
per-component basis, as is done in PLT Scheme. For complex numbers
written in rectangular form, exactness specifiers are applied to the
real and imaginary parts before calling scm_make_rectangular. For
complex numbers written in polar form, exactness specifiers are applied
to the magnitude and angle before calling scm_make_polar.
There are two kinds of exactness specifiers: forced and implicit. A
forced exactness specifier is a "#e" or "#i" prefix at the beginning of
the entire number, and applies to both components of a complex number.
"#e" causes each component to be made exact, and "#i" causes each
component to be made inexact. If no forced exactness specifier is
present, then the exactness of each component is determined
independently by the presence or absence of a decimal point or hash mark
within that component. If a decimal point or hash mark is present, the
component is made inexact, otherwise it is made exact.
After the exactness specifiers have been applied to each component, they
are passed to either scm_make_rectangular or scm_make_polar to produce
the final result. Note that this will result in a real number if the
imaginary part, magnitude, or angle is an exact 0.
Previously, both forced and implicit exactness specifiers applied to
the number as a whole _after_ calling scm_make_rectangular or
scm_make_polar.
For example, (string->number "#i5.0+0i") now does the equivalent of:
(make-rectangular (exact->inexact 5.0) (exact->inexact 0))
which yields 5.0+0.0i. Previously it did the equivalent of:
(exact->inexact (make-rectangular 5.0 0))
which yielded 5.0.
* libguile/numbers.c (mem2ureal): Receive a forced exactness specifier
(forced_x), create and maintain our own implicit exactness specifier
flag local to this component (implicit_x), and apply these exactness
specifiers within this function. Previously, we received a pointer to
an implicit exactness specifier flag from above, and the exactness
specifiers were applied from within scm_i_string_length.
(mem2complex): Receive a forced exactness specifier parameter and pass
it down to mem2ureal. Previously, we passed down a pointer to an
implicit exactness specifier flag instead.
(scm_i_string_to_number): No longer create an implicit exactness
specifier flag here, and do not apply exactness specifiers here. All
we do here now regarding exactness is to parse the "#e" or "#i" prefix
(if any) and pass this information down to mem2ureal via mem2complex
in the form of an explicit exactness specifier (forced_x).
(scm_c_make_polar): If the cosine and sine of the angle are both NaNs
and the magnitude is zero, return 0.0+0.0i instead of +nan.0+nan.0i.
This case happens when the angle is not finite.
* test-suite/tests/numbers.test (string->number): Move the test cases
for non-real complex numbers into a separate table in which the
expected real and imaginary parts are separate entries. Add several
new test cases.
Add the ability to represent non-real complex numbers whose imaginary
part is an _inexact_ zero (0.0 or -0.0), per R6RS. Previously, such
numbers were immediately changed into inexact reals.
* libguile/numbers.c: Remove from the list of `General assumptions' in
numbers.c that objects satisfying SCM_COMPLEXP() have a non-zero
complex component. This is no longer true. Also add a warning
about another unrelated assumption that is not entirely correct
(that floor(r) == r implies that mpz_set_d will DTRT; it won't
if r is infinite).
(icmplx2str): Always print the imaginary part, even if it is zero.
Also handle a negative zero imaginary part more gracefully. It
now prints 0.0-0.0i, where previously it would print 0.0+-0.0i.
(mem2ureal): Replace scm_from_double (0.0) with flo0.
(scm_c_make_rectangular): Always create non-real complex numbers.
Previously it would create inexact reals if the specified imaginary
part was zero.
(scm_make_rectangular): If the imaginary part is an _exact_ 0, return
the real part unchanged (possibly exact), otherwise return a non-real
complex number (possibly with an inexact zero imaginary part).
Previously, it would return an inexact real number whenever the
imaginary part was any kind of zero.
(scm_make_polar): If the magnitude is an exact 0, return an exact 0.
If the angle is an exact 0, return the magnitude unchanged (possibly
exact). Otherwise return a non-real complex number (possibly with an
inexact zero imaginary part). Previously, it would return a real
number whenever the imaginary part was any kind of zero.
(scm_imag_part): Return an exact 0 if applied to a real number.
Previously it would return an inexact zero if applied to an inexact
real number.
(scm_inexact_to_exact): Accept complex numbers with inexact zero
imaginary part. In that case, simply use the real part and ignore the
imaginary part. Essentially we coerce the inexact zero imaginary part
to an exact 0.
* test-suite/tests/numbers.test: Add many test cases, and modify
existing tests as needed to reflect these changes. Also add a new
internal predicate: `almost-real-nan?' which tests for a non-real
complex number with zero imaginary part whose real part is a NaN.
* doc/ref/api-data.texi (Complex Numbers): Update description of complex
numbers to reflect these changes: non-real complex numbers in Guile
need not have non-zero imaginary part. Also, each part of a complex
number may be any inexact real, not just rationals as was previously
stated. Explicitly mention that each part may be an infinity, a NaN,
or a signed zero.
(Complex Number Operations): Change the formal parameter names of
`make-polar' from `x' and `y' to `mag' and `ang'.
* NEWS: Add news entries.
* libguile/numbers.c (scm_abs): (abs -0.0) now returns 0.0. Previously
it returned -0.0. Also move the REALP case above the BIGP case,
and consider it SCM_LIKELY to be REALP if not INUMP.
(scm_difference): (- 0 0.0) now returns -0.0. Previously it returned
0.0. Also make sure that (- 0 0.0+0.0i) will return -0.0-0.0i.
* test-suite/tests/numbers.test (abs, -): Add test cases, and change
some tests to use `eqv?' instead of `=', in order to test exactness
and distinguish signed zeroes.
* libguile/numbers.c (scm_min, scm_max): Properly order the real
infinities and NaNs, per R6RS, and also take care to handle signed
zeroes properly. Note that this ordering is different than that of
`<', `>', `<=', and `>=', which return #f if any argument is a real
NaN, and consider the real zeroes to be equal. The relevant real
infinity (-inf.0 for min, +inf.0 for max) beats everything, including
NaNs, and NaNs beat everything else. Previously these were handled
improperly in some cases, e.g.:
(min 1/2 +nan.0) now returns +nan.0 (previously returned 0.5),
(max 1/2 +nan.0) now returns +nan.0 (previously returned 0.5),
(min -inf.0 +nan.0) now returns -inf.0 (previously returned +nan.0),
(max +inf.0 +nan.0) now returns +inf.0 (previously returned +nan.0),
(min -0.0 0.0) now returns -0.0 (previously returned 0.0),
(max 0.0 -0.0) now returns 0.0 (previously returned -0.0),
(max 0 -0.0) now returns 0.0 (previously returned -0.0),
(max -0.0 0 ) now returns 0.0 (previously returned -0.0).
* test-suite/tests/numbers.test (min, max): Add many more test cases
relating to NaNs, infinities, and signed zeroes. Change most existing
test cases to use `eqv?' instead of `=', in order to check exactness.
* module/rnrs/io/ports.scm (&i/o-encoding): New error condition type.
(with-i/o-encoding-error): New macro.
(put-char, put-datum, put-string): Use it.
* test-suite/tests/r6rs-ports.test ("8.2.6 Input and output
ports")["transcoded-port, output [error handling mode = raise]"]: New
test.
* module/rnrs/io/ports.scm (&i/o-decoding): New error condition type.
(with-i/o-decoding-error): New macro.
(get-char, get-datum, get-line, get-string-all, lookahead-char): Use
it.
* test-suite/tests/r6rs-ports.test ("8.2.6 Input and output
ports")["transcoded-port [error handling mode = raise]"]: Use `guard'
and `i/o-decoding-error?'.
* libguile/ports.c (scm_read_char): Mention `decoding-error' in the
docstring.
(get_codepoint): Change to return an error code; add `codepoint'
output parameter. Don't raise an error from here.
(scm_getc): Raise an error with `scm_decoding_error' if
`get_codepoint' returns an error.
(scm_peek_char): Likewise. Update docstring.
* libguile/strings.c (scm_decoding_error_key): New variable.
(scm_decoding_error): New function.
(scm_from_stringn): Use `scm_decoding_error' instead of
`scm_encoding_error'.
* libguile/strings.h (scm_decoding_error): New declaration.
* test-suite/tests/ports.test ("string ports")["read-char, wrong
encoding, error"]: Change to expect `decoding-error'. Make sure PORT
points past the error.
["read-char, wrong encoding, escape"]: Likewise.
["peek-char, wrong encoding, error"]: New test.
* test-suite/tests/r6rs-ports.test ("7.2.11 Binary
Output")["put-bytevector with wrong-encoding string port"]: Change to
expect `decoding-error'.
("8.2.6 Input and output ports")["transcoded-port [error handling
mode = raise]"]: Likewise.
* test-suite/tests/rdelim.test ("read-line")["decoding error", "decoding
error, substitute"]: New tests.
* doc/ref/api-io.texi (Reading): Update documentation of `read-char' and
`peek-char'.
(Line/Delimited): Update documentation of `read-line'.
* libguile/numbers.c (scm_product): Handle exact 0 differently. A
product containing an exact 0 now returns an exact 0 if and only if
the other arguments are all exact. An inexact zero is returned if and
only if the other arguments are all finite but not all exact. If an
infinite or NaN value is present, a NaN value is returned.
Previously, any product containing an exact 0 yielded an exact 0,
regardless of the other arguments.
A note on the rationale for (* 0 0.0) returning 0.0 and not exact 0:
The exactness propagation rules allow us to return an exact result in
the presence of inexact arguments only if the values of the inexact
arguments do not affect the result. In this case, the value of the
inexact argument _does_ affect the result, because an infinite or NaN
value causes the result to be a NaN.
A note on the rationale for (* 0 +inf.0) being a NaN and not exact 0:
The R6RS requires that (/ 0 0.0) return a NaN value, and that (/ 0.0)
return +inf.0. We would like (/ x y) to be the same as (* x (/ y)),
and in particular, for (/ 0 0.0) to be the same as (* 0 (/ 0.0)),
which reduces to (* 0 +inf.0). Therefore (* 0 +inf.0) should return
a NaN.
* test-suite/tests/numbers.test: Add many multiplication tests.
* NEWS: Add NEWS entry.
* test-suite/tests/numbers.test: (real-nan?, complex-nan?,
imaginary-nan?): Add more discriminating NaN testing predicates
internal to numbers.test, and convert several uses of `nan?'
to use these instead:
* `real-nan?' checks that its argument is real and a NaN.
* `complex-nan?' checks that both the real and imaginary
parts of its argument are NaNs.
* `imaginary-nan?' checks that its argument's real part
is zero and the imaginary part is a NaN.
* libguile/numbers.c (scm_rationalize): Fix bugs. Previously, it
returned exact integers unmodified, although that was incorrect if
the epsilon was at least 1 or inexact, e.g. (rationalize 4 1) should
return 3 per R5RS and R6RS, but previously it returned 4. Also
handle cases involving infinities and NaNs properly, per R6RS.
* test-suite/tests/numbers.test: Add test cases for `rationalize'.
* NEWS: Add NEWS entry
* libguile/numbers.c (scm_integer_expt): No longer require that the
first argument be a number, in order to improve extensibility. This
allows us to efficiently raise arbitrary objects to an integer power
as long as we can multiply those objects. For example, this allows us
to efficiently exponentiate matrices if we define only multiplication
methods for matrices. Note also that scm_expt calls this procedure
whenever the exponent is an integer, regardless of the type of the
first argument. Also rearrange the order in which we test special
cases.
* test-suite/tests/numbers.test (expt, integer-expt): Comment out tests
that required `(expt #t 0)' and `(integer-expt #t 0)' to throw
exceptions. Add tests for (expt #t 2) and `(integer-expt #t 2)
instead.
* NEWS: Add NEWS entry
* test-suite/tests/numbers.test (test-eqv?): Remove special handling of
zeroes. Zeroes are now compared like all other numbers. Exact
numbers are compared with `eqv?' and inexact numbers are compared to
within test-epsilon.
Rework the testing framework for number-theoretic division operators:
`euclidean/', `euclidean-quotient', `euclidean-remainder',
`centered/', `centered-quotient', and `centered-remainder'.
Previously we compared all test results against a simple scheme
implementation of the same operations. However, these operations have
discontinuous jumps where a tiny change in the inputs can lead to a
large change in the outputs, e.g.:
(euclidean/ 130.00000000000 10/7) ==> 91.0 and 0.0
(euclidean/ 129.99999999999 10/7) ==> 90.0 and 1.42857142856141
In the new testing scheme, we compare values against the simple
implementations only if the input arguments contain an infinity or a
NaN. In the common case of two finite arguments, we simply make sure
that the outputs of all three operators (e.g. `euclidean/',
`euclidean-quotient', `euclidean-remainder') equal each other, that
outputs are exact iff both inputs are exact, and that the required
properties of the operator are met: that Q is an integer, that R is
within the specified range, and that N = Q*D + R.
* libguile/numbers.c (scm_quotient, scm_remainder, scm_modulo,
scm_zero_p, scm_positive_p, scm_negative_p, scm_real_part,
scm_imag_part, scm_numerator, scm_denominator, scm_magnitude,
scm_angle, scm_exact_to_inexact): Change from SCM_GPROC to
SCM_PRIMITIVE_GENERIC. As a side effect, all of these procedures now
have documentation strings.
(scm_exact_p, scm_inexact_p, scm_odd_p, scm_even_p, scm_finite_p,
scm_inf_p, scm_nan_p, scm_expt, scm_inexact_to_exact, scm_log,
scm_log10, scm_exp, scm_sqrt): Change from SCM_DEFINE to
SCM_PRIMITIVE_GENERIC, and make sure the code allows these functions
to be extended in practice.
(scm_real_part, scm_imag_part, scm_numerator, scm_denominator,
scm_inexact_to_exact): Simplify type dispatch code.
(scm_sqrt): Rename formal argument from x to z, since complex numbers
are supported.
(scm_abs): Fix empty FUNC_NAME.
* libguile/numbers.h (scm_finite_p): Add missing prototype.
(scm_inf_p, scm_nan_p): Rename formal parameter from n to x, since
the domain is the real numbers.
* test-suite/tests/numbers.test: Test for documentation strings. Change
from `expect-fail' to `pass-if' for several of these, and add tests
for others. Also add other tests for `real-part' and `imag-part',
which previously had none.
* libguile/numbers.c (scm_euclidean_quo_and_rem, scm_euclidean_quotient,
scm_euclidean_remainder, scm_centered_quo_and_rem,
scm_centered_quotient, scm_centered_remainder): New extensible
procedures `euclidean/', `euclidean-quotient', `euclidean-remainder',
`centered/', `centered-quotient', `centered-remainder'.
* libguile/numbers.h: Add function prototypes.
* module/rnrs/base.scm: Remove incorrect stub implementations of `div',
`mod', `div-and-mod', `div0', `mod0', and `div0-and-mod0'. Instead do
renaming imports of `euclidean-quotient', `euclidean-remainder',
`euclidean/', `centered-quotient', `centered-remainder', and
`centered/', which are equivalent to the R6RS operators.
* module/rnrs/arithmetic/fixnums.scm (fxdiv, fxmod, fxdiv-and-mod,
fxdiv0, fxmod0, fxdiv0-and-mod0): Remove redundant checks for division
by zero and unnecessary complexity.
(fx+/carry): Remove unneeded calls to `inexact->exact'.
* module/rnrs/arithmetic/flonums.scm (fldiv, flmod, fldiv-and-mod,
fldiv0, flmod0, fldiv0-and-mod0): Remove redundant checks for division
by zero and unnecessary complexity. Remove unneeded calls to
`inexact->exact' and `exact->inexact'
* test-suite/tests/numbers.test: (test-eqv?): New internal predicate for
comparing numerical outputs with expected values.
Add extensive test code for `euclidean/', `euclidean-quotient',
`euclidean-remainder', `centered/', `centered-quotient',
`centered-remainder'.
* test-suite/tests/r6rs-arithmetic-fixnums.test: Fix some broken test
cases, and remove `unresolved' test markers for `fxdiv', `fxmod',
`fxdiv-and-mod', `fxdiv0', `fxmod0', and `fxdiv0-and-mod0'.
* test-suite/tests/r6rs-arithmetic-flonums.test: Remove `unresolved'
test markers for `fldiv', `flmod', `fldiv-and-mod', `fldiv0',
`flmod0', and `fldiv0-and-mod0'.
* doc/ref/api-data.texi (Arithmetic): Document `euclidean/',
`euclidean-quotient', `euclidean-remainder', `centered/',
`centered-quotient', and `centered-remainder'.
(Operations on Integer Values): Add cross-references to `euclidean/'
et al, from `quotient', `remainder', and `modulo'.
* doc/ref/r6rs.texi (rnrs base): Improve documentation for `div', `mod',
`div-and-mod', `div0', `mod0', and `div0-and-mod0'. Add
cross-references to `euclidean/' et al.
* NEWS: Add NEWS entry.
* module/rnrs/base.scm (real-valued?, rational-valued?,
integer-valued?): Implement in compliance with R6RS.
* test-suite/tests/r6rs-base.test: Add test cases for
`real-valued?', `rational-valued?', and `integer-valued?'.
* NEWS: Add NEWS entries.
* libguile/numbers.c (scm_rational_p): Return #f for infinities and
NaNs, per R6RS. Previously it returned #t for real infinities
and NaNs. They are still considered real by scm_real `real?'
however, per R6RS. Also simplify the code.
(scm_real_p): New implementation to reflect the fact that the
rationals and reals are no longer the same set. Previously it just
called scm_rational_p.
(scm_integer_p): Simplify the code.
* test-suite/tests/numbers.test: Add test cases for `rational?'
and `real?' applied to infinities and NaNs.
* doc/ref/api-data.texi (Real and Rational Numbers): Update docs to
reflect the fact that infinities and NaNs are no longer rational, and
that `real?' no longer implies `rational?'. Improve discussion of
infinities and NaNs.
* NEWS: Add NEWS entries, and combine with an earlier entry about
infinities no longer being integers.
Change `equal?' to work like `eqv?' for numbers.
Previously they worked differently in some cases, e.g.
when comparing signed zeroes or NaNs. For example,
(equal? 0.0 -0.0) returned #t but (eqv? 0.0 -0.0)
returned #f, and (equal? +nan.0 +nan.0) returned #f
but (eqv? +nan.0 +nan.0) returned #t.
* libguile/numbers.c (scm_real_equalp, scm_bigequal,
scm_complex_equalp, scm_i_fraction_equalp): Move to eq.c.
* libguile/eq.c (scm_real_equalp): Compare flonums using
real_eqv instead of ==, so that NaNs are now considered
equal, and to distinguish signed zeroes.
(scm_complex_equalp): Compare real and imaginary
components using real_eqv instead of ==, so that NaNs are
now considered equal, and to distinguish signed zeroes.
(scm_bigequal): Use scm_i_bigcmp instead of duplicating it.
(real_eqv): Test for NaNs using isnan(x) instead of
(x != x), and use SCM_UNLIKELY for optimization.
(scm_eqv_p): Use scm_bigequal, scm_real_equalp,
scm_complex_equalp, and scm_i_fraction_equalp to compare
numbers, instead of inline code. Those predicates now do
what scm_eqv_p formerly did internally. Replace if
statements with switch statements, as is done in
scm_equal_p. Remove useless code to check equality of
fractions with different SCM_CELL_TYPEs; this was for a
tentative "lazy reduction bit" which was never developed.
(scm_eqv_p, scm_equal_p): Remove useless code to check
equality between inexact reals and non-real complex numbers
with zero imaginary part. Such numbers do not exist,
because the current code is careful to never create them.
* test-suite/tests/numbers.test: Add test cases for
`eqv?' and `equal?'. Change existing test case for
`(equal? +nan.0 +nan.0)' to expect #t instead of #f.
* NEWS: Add NEWS entries.
* libguile/socket.c (scm_recv, scm_send, scm_recvfrom, scm_sendto):
Expect the buffer to be a bytevector. Move the string-handling
code under `#if SCM_ENABLE_DEPRECATED == 1' and issue a deprecation
warning.
* test-suite/tests/socket.test ("AF_UNIX/SOCK_DGRAM")["sendto",
"sendto/sockaddr"]: Adjust accordingly.
* doc/ref/posix.texi (Network Sockets and Communication): Update
documentation of `recv!', `send', `recvfrom!', and `sendto'.
* libguile/numbers.c (scm_difference, scm_product):
Fix bugs when negating SCM_MOST_POSITIVE_FIXNUM+1,
aka -SCM_MOST_NEGATIVE_FIXNUM. Previously, these cases
failed to normalize the result to a fixnum, causing
`=', `eqv?' and `equal?' to fail, e.g.:
(= most-negative-fixnum (- 0 (- most-negative-fixnum)))
(= most-negative-fixnum (* -1 (- most-negative-fixnum)))
(= most-negative-fixnum (* (- most-negative-fixnum) -1))
* test-suite/test/numbers.test: Add test cases to detect
bugs when negating SCM_MOST_POSITIVE_FIXNUM+1 and
SCM_MOST_NEGATIVE_FIXNUM by various methods.
* libguile/numbers.c (scm_inf_p, scm_finite_p, scm_nan_p): The domain of
these functions is the real numbers. Error on other input.
* doc/ref/api-data.texi (Reals and Rationals): Update the documentation
accordingly.
* test-suite/tests/numbers.test ("finite?", "inf?"): Update tests.
* libguile/numbers.c (scm_exact_p): Optimize by making use of the
SCM_INEXACTP macro.
(scm_inexact_p): Move it next to scm_exact_p, and add else's.
* test-suite/tests/numbers.test: Add test cases for `exact?'
and `inexact?' applied to infinities and NaNs.
* libguile/numbers.c (scm_finite_p): Add new predicate `finite?' from
R6RS to guile core, which returns #t if and only if its argument is
neither infinite nor a NaN. Note that this is not the same as (not
(inf? x)) or (not (infinite? x)), since NaNs are neither finite nor
infinite.
* test-suite/tests/numbers.test: Add test cases for `finite?'.
* module/rnrs/base.scm: Import `inf?' as `infinite?' instead of
reimplementing it. Previously, the R6RS implementation of
`infinite?' did not detect non-real complex infinities, nor did it
throw exceptions for non-numbers. (Note that NaNs _are_ considered
numbers by scheme, despite their name).
Import `finite?' instead of reimplementing it. Previously, the R6RS
implementation of `finite?' returned #t for both NaNs and non-real
complex infinities, in violation of R6RS.
* NEWS: Add NEWS entries, and reorganize existing numerics-related
entries together under one subheading.
* doc/ref/api-data.texi (Real and Rational Numbers): Add docs for
`finite?' and scm_finite_p.
As a result `read-line' handles decoding and decoding errors the same
way as `scm_getc'. It's also simpler and free of `malloc' calls.
* libguile/rdelim.c (scm_do_read_line): Remove.
(scm_read_line): Rewrite as a loop that calls `scm_getc'.
* test-suite/tests/rdelim.test: New file.
* test-suite/Makefile.am (SCM_TESTS): Add `tests/rdelim.test'.
* libguile/ports.c (get_codepoint): Reset `pt->input_cd' upon failure.
If `pt->ilseq_handler' is `SCM_ICONVEH_QUESTION_MARK', then return a
question mark.
[failure]: Use `scm_encoding_error' when raising an error.
* test-suite/lib.scm (exception:encoding-error): Adjust regexp.
* test-suite/tests/ports.test ("string ports")["read-char, wrong
encoding, error", "read-char, wrong encoding, escape", "read-char,
wrong encoding, substitute"]: New tests.
