George Koehler
59b3c10563
Use (arith) 1 << ... when getting the sign bit.
...
This prevents an overflow reported by @hexcoder- in
https://github.com/davidgiven/ack/issues/56
lang/cem/cpp.ansi/LLlex.c used a plain 1 << ... and caused an overflow
on machines where sizeof(int) < sizeof(long). Using 1L << ... would
work for now but might fail later if arith became long long.
C doesn't specify whether negative integers use 2's complement or some
other format. Therefore, (arith) 1 << ... has an undefined value. It
should still work because the value is some integer where the sign bit
is set and all other bits are clear.
(unsigned arith) 1 << ... would also get the sign bit, but casting it
from unsigned back to signed would make the same undefined value.
(arith) -1 << ... would assume 2's complement.
2017-10-29 17:45:10 -04:00
George Koehler
038fb6fb55
Get correct sign of a MOD b when (a > 0) and (b < 0).
...
Reported by me in https://github.com/davidgiven/ack/issues/60
This doesn't change DIV. Right now a DIV b does floor division and
a MOD b has the sign of b. This is the same as Lua, Python, Ruby,
Tcl; but is different from other Modula-2 implementations.
2017-10-28 19:55:06 -04:00
George Koehler
649410bb27
Always use unsigned long.
...
Traditional C compilers had long but not unsigned long. I now assume
that everyone can compile unsigned long. Remove macro UNSIGNED_ARITH
and act like it is always defined. The type `unsigned arith` works
because arith is a macro for long.
2017-10-28 17:56:20 -04:00
David Given
fd91851005
Add enough return types to the K&R C that the ACK builds (on Linux) using clang
...
now.
2016-11-10 22:04:18 +01:00
David Given
f6c43b95ef
Modula-2 now works.
...
--HG--
branch : dtrg-buildsystem
rename : lang/pc/build.mk => lang/m2/build.mk
rename : lang/pc/libpc/build.mk => lang/m2/comp/build.mk
rename : lang/pc/libpc/build.mk => lang/m2/libm2/build.mk
2013-05-14 22:24:38 +01:00
ceriel
efacd02ffd
Added LONGCARD as a local extension
1996-08-14 07:42:40 +00:00
ceriel
1db6a3029b
Header --> Id
1994-06-24 14:02:31 +00:00
ceriel
5a53ba3f50
Several minor mods: simplifications and identifier name changes
1991-03-18 16:30:49 +00:00
ceriel
852601d0b5
minor mods
1991-03-14 13:16:32 +00:00
ceriel
86bc055fa1
Corrected error on NOCROSS
1991-03-14 09:31:32 +00:00
ceriel
f7504dbd4b
Cleaned up a bit more
1991-03-13 17:26:07 +00:00
ceriel
52842cd09a
Cleaned up a bit
1991-03-13 13:49:56 +00:00
ceriel
0a517b9256
Changes to make node structure smaller, and cleaned up a bit
1991-03-12 16:52:00 +00:00
ceriel
76d79cf17a
Added macro's for long selections
1991-03-06 10:52:34 +00:00
ceriel
109a357e95
Fix: DIV and MOD on negative args
1990-07-16 09:05:19 +00:00
ceriel
c3b3faf7a4
Added support for constant floating point expressions
1989-12-19 09:40:25 +00:00
ceriel
d277946286
changed name of some identifiers to more accurately represent their
...
meaning, and fixed a problem with sometimes not detecting overflow in
constants
1989-08-08 09:11:32 +00:00
ceriel
f9b6acf1dc
New version with different parameter passing mechanism and some
...
minor fixes
1989-03-20 13:32:06 +00:00
ceriel
ce0ec1c143
delinted somewhat
1988-10-13 15:43:23 +00:00
ceriel
905c5a349f
fix: >= and <= were wrong in constant expressions
1988-08-05 11:22:39 +00:00
ceriel
2bbecf2416
better argument checking of standard functions
1988-04-26 10:14:01 +00:00
ceriel
0976dfa3b9
too many changes: some cosmetic; some for 2/4; some for added options
1988-03-21 17:06:20 +00:00
ceriel
78926a5a84
fix typo and parameters of overflow
1988-03-08 10:35:53 +00:00
ceriel
ad2d61154b
fixed some minor problems
1988-01-15 16:55:01 +00:00
ceriel
a61d36ff49
fixes and squeezing
1987-12-02 10:41:38 +00:00
ceriel
896fec3fc5
version with better overflow checking
1987-11-26 14:15:24 +00:00
ceriel
b668810351
sets now allowed for all subranges
1987-10-28 16:03:56 +00:00
ceriel
688567a532
fix in reference counts for sets
1987-10-20 13:32:18 +00:00
ceriel
503edee161
New version, with an option for strict Modula-2, and
...
warnings for unused or uninitialized variables
1987-10-19 11:28:37 +00:00
ceriel
fd817d4dbc
Minor adaptions in order to reduce the size
1987-09-23 16:39:43 +00:00
ceriel
0e397f09f3
many changes; some cosmetic; coercions now explicit in tree
1987-07-30 13:37:39 +00:00
ceriel
6614384f3c
fixes, changes to make smaller on PDP
1987-07-21 13:54:33 +00:00
ceriel
746f94368d
fixes, added 's' option
1987-06-23 17:12:25 +00:00
ceriel
c839c01680
some fixes, and changed priority of unary minus
1987-06-18 15:46:08 +00:00
ceriel
bb9b16ab50
fixes, added some standard functions to handle LONGREAL, LONGINT
1987-05-27 10:16:03 +00:00
ceriel
ed2d6ab75b
some changes to make smaller
1987-05-21 09:37:28 +00:00
ceriel
6fc7d0f866
bug fix in constant set computations
1987-05-13 13:04:28 +00:00
ceriel
48acbe27bb
fixed a minor bug in cstoper.c: computation of mach_long_sign was wrong
1987-05-12 11:15:55 +00:00
ceriel
fbc0415761
make to work on sun, added copyright, etc
1987-04-29 10:22:07 +00:00
ceriel
a0c21bf820
many bug fixes, and added flexibility in alignments
1986-11-28 11:59:08 +00:00
ceriel
9d0ee46068
Trying to check more of an expression, giving some more sophisticated error messages,and be less wasteful with space for subranges
1986-11-17 11:41:28 +00:00
ceriel
9291d87dab
Several bug fixes
1986-11-05 14:33:00 +00:00
ceriel
3030eb8cae
newer version
1986-10-06 20:36:30 +00:00
ceriel
a0db745586
newer version with bug fixes
1986-08-26 14:33:24 +00:00
ceriel
d5a95fcac0
Some bug fixes
1986-07-14 15:00:08 +00:00
ceriel
965e75761d
newer version
1986-07-08 14:59:02 +00:00
ceriel
bcfca75b56
newer version
1986-06-26 09:39:36 +00:00
ceriel
ec528b797e
newer version
1986-06-10 13:18:52 +00:00
ceriel
caf99ea472
newer version
1986-06-06 02:22:09 +00:00
ceriel
9e0ab0029b
first, almost complete, version
1986-06-04 09:01:48 +00:00
