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905 commits

Author SHA1 Message Date
Justin Ethier
29b4c77922 Cleanup 2024-03-13 19:32:15 -07:00
Yorick Hardy
4bbceeb4d6 round half-integers to even instead of away from zero 
This changes the behaviour to match r7rs (round x) instead of C round(x).

An answer to https://stackoverflow.com/questions/32746523/ieee-754-compliant-round-half-to-even
suggests using remainder(). The following will work if FE_TONEAREST is defined, but C11
requires FE_TONEAREST to be defined if and only if the implemenetation supports it in
fegetround() and fesetround() [Draft N1570]. On the other hand, remainder() must be defined.
C23 will have roundeven(), but this is not yet available on all platforms.
The behaviour of remainder is described in Draft N1570, page 254, footnote 239.

Alternative implementation:

  double round_to_nearest_even(double x)
  {
  #pragma STDC FENV_ACCESS ON
    int mode;
    double nearest;
    mode = fegetround();
    fesetround(FE_TONEAREST);
    nearest = nearbyint(x);
    fesetround(mode);
  #pragma STDC FENV_ACCESS OFF
    return nearest;
  }
 2024-02-01 22:25:47 +02:00
Justin Ethier
3b921e7389 Re-format code 2024-01-17 19:43:47 -08:00
Justin Ethier
88fb4b909f Issue #519 - fix bignum TODO's in Cyc_remainder 2024-01-07 19:40:32 -08:00
Justin Ethier
749d4b6a0c Issue #519 - Properly handle doubles in remainder 2024-01-07 19:29:20 -08:00
Justin Ethier
d048b3d4f0 Issue #519 - numerator/denominator 
Return fixnum or bignum values from this function when they are passed as arg, per R7RS.
 2024-01-07 07:44:04 -08:00
Justin Ethier
1a0f42386b Issue #519 - Return fixnum from div if possible 2024-01-06 14:37:15 -08:00
Justin Ethier
8875c534dc Issue #519 - allow fixnum results from Cyc_div_op 
Need to extend this to fast_div, but this is another good edge case.
 2024-01-06 09:14:01 -08:00
Justin Ethier
8bf60e9239 Free memory 2023-11-27 19:43:38 -08:00
Justin Ethier
132c745330 Cleanup 2023-11-27 19:33:19 -08:00
Justin Ethier
08bd333701 Cleanup 2023-11-27 18:59:42 -08:00
Justin Ethier
4d902f9a77 WIP - support for bignums in rational parsing 2023-11-20 19:44:17 -08:00
Justin Ethier
bb4e176e42 WIP, read rationals as inexact nums 2023-11-16 19:37:36 -08:00
Justin Ethier
c599dbb62a WIP 2023-11-15 19:43:25 -08:00
Justin Ethier
9c197965b3 Cleanup, add TODO 2023-11-14 19:48:02 -08:00
Justin Ethier
abaed9f6f2 Issue #510 - Implement exact using runtime functions 2023-09-12 19:20:38 -07:00
Justin Ethier
29a27098a8 Issue #510 - Stage macos compat fix 
Apparently mp_set_double does not compile on OSX. Need to fix up this portion of the code.
 2023-09-11 19:53:43 -07:00
Justin Ethier
0533d3eab0 Merge branch 'issue-509' 2023-09-04 18:31:58 -07:00
Justin Ethier
20fe02d9d9 Issue #509 - Raise error on invalid complex ops 
Error on more types of complex comparison operations.
 2023-08-23 20:00:44 -07:00
Justin Ethier
cc24c6be6d Issue #511 - Properly recognize +inf.0 / -inf.0 2023-08-21 19:11:59 -07:00
Justin Ethier
ca931300e3 WIP 2023-08-17 19:56:41 -07:00
Justin Ethier
ad1ac3a135 Issue #490 - Proper assv and memv implementations 
Both were previously implemented in terms of `assq` and `memq`, respectively.
 2022-07-24 10:56:41 -04:00
Justin Ethier
6ffd229dcd Add memory-streams to list of features 2022-05-28 08:21:11 -07:00
Justin Ethier
5101de1547 Issue #143 - Track recursion depth of equalp 
This prevents the possibility of segfaulting when traversing arbitrarily complex circular structures.
 2022-05-26 13:02:24 -04:00
Justin Ethier
d3f7262414 Issue #143 - Max recursion depth for printing 
Enforce a maximum C recursion depth when printing data structures. This protects against cases where a circular data structure may produce infinite output, blowing the stack. The recursive limit is sufficiently large such that a non-circular structure should not be impacted.
 2022-05-25 22:28:08 -04:00
Justin Ethier
43267e2939 WIP 2022-05-24 23:02:18 -04:00
Justin Ethier
2e84aaac9c Issue #484 - Improve handling of exporting prims 
To fixes:
- Prevent segfault setting a global variable to itself
- Do not throw an error when exporting a primitive that is not defined in the current module, as built-ins are always available in any context.
 2021-12-13 19:05:18 -08:00
Justin Ethier
d2915abe6a Issue #477 - Clean up 2021-08-12 23:01:04 -04:00
Justin Ethier
4ff0bca100 Issue #477 - Added CYC_PTHREAD_SET_STACK_SIZE 2021-08-12 22:46:13 -04:00
Justin Ethier
14d4c27eac Issue #472 - Avoid races with tracing GC when allocating large vectors 2021-07-28 22:26:33 -04:00
Justin Ethier
2a9d0ea604 Issue #279 - Support end-result and return from thread-join 2021-07-25 23:02:31 -04:00
Justin Ethier
d99d4a9459 Cleanup 2021-07-23 15:45:08 -04:00
Justin Ethier
efece6a413 Handle complex numbers better for numerator/denominator 
Peel off real part if there is no imaginary part
 2021-07-22 21:45:08 -04:00
Justin Ethier
48a7958c33 Initial numerator/denominator complex num support 2021-07-22 17:21:52 -04:00
Justin Ethier
826e7895ae Issue #433 - Special case, denominator of 0 is 1 2021-07-22 17:16:53 -04:00
Justin Ethier
f17102178b Continue building-out new numerator/denominator 2021-07-21 19:47:42 -07:00
Justin Ethier
63b7c12ede TODO: numerator/denominator support 2021-07-21 15:47:06 -04:00
Justin Ethier
d9d1b35a62 Issue #351 - Prevent compiled warnings on clang 
Cleaned up code to prevent compiler warnings with respect to comparing uint8 with EOF (IE, -1).
 2021-07-15 19:20:47 -07:00
Justin Ethier
71cca38b44 Issue #379 - Fix read-line to be compatible with other I/O functions 
The function now uses the same port buffer as our other I/O functions.
 2021-07-14 23:00:42 -04:00
Justin Ethier
215552cfe7 Working version of Cyc_io_read_line_slow 2021-07-14 17:28:59 -04:00
Justin Ethier
5a50814a61 WIP for read_line slow 2021-07-14 13:40:32 -04:00
Justin Ethier
92bc2364fe WIP 2021-07-13 20:00:36 -07:00
Justin Ethier
8aec6c4c83 Stub out approach for fully-integrated read-line 2021-07-13 19:45:10 -07:00
Justin Ethier
358fe01fc2 Issue #211 - production version of (char-ready?) 2021-06-08 13:38:33 -04:00
Justin Ethier
fd5406a195 Explicitly include sys/select.h 2021-06-08 11:03:27 -04:00
Justin Ethier
766b9066f5 Issue #211 - Initial char-ready implementation 2021-06-07 19:57:13 -07:00
Justin Ethier
61d0f3396b Revert "Eliminate unnecessary code" 
This reverts commit 8802ec2a67.
 2021-05-25 21:30:25 -04:00
Justin Ethier
8802ec2a67 Eliminate unnecessary code 2021-05-24 19:07:09 -07:00
Justin Ethier
100c9c50ab Fix primitive_type declarations so module compiles 2021-05-24 18:49:45 -07:00
Justin Ethier
6ac96ea5c2 Simplify num argument checks for apply 
Avoid calling (length) twice, cleanup, and simplify related code.
 2021-05-24 12:41:19 -04:00