Mercurial > hg > xemacs-beta
annotate lib-src/make-dump-id.c @ 5911:48386fd60fd0
GMP functions that take doubles choke on non-finite values, avoid that.
src/ChangeLog addition:
2015-05-10 Aidan Kehoe <kehoea@parhasard.net>
* floatfns.c (double_to_integer):
Rename this from float_to_int to fit our newer, bignum-compatible
terminology.
GMP can signal SIGFPE when asked to turn NaN or infinity into a
bignum, and we're not prepared to handle that signal if the OS float
library routines don't do that, so check for those values
explicitly.
* floatfns.c (ceiling_two_float):
* floatfns.c (ceiling_one_float):
* floatfns.c (floor_two_float):
* floatfns.c (floor_one_float):
* floatfns.c (round_two_float):
* floatfns.c (round_one_float):
* floatfns.c (truncate_two_float):
* floatfns.c (truncate_one_float):
Call double_to_integer() with its new name.
* number.c:
Don't use the {bignum,ratio,bigfloat}_set_double functions
directly here, with GMP they can choke when handed non-finite C
doubles, call Ftruncate() and the new float_to_bigfloat() from
floatfns.c. Maybe we should extend number-gmp.c with GMP-specific
implementations that check for non-finite values.
tests/ChangeLog addition:
2015-05-10 Aidan Kehoe <kehoea@parhasard.net>
* automated/lisp-tests.el:
Backslash a few parentheses in the first column for the sake of
fontification.
* automated/lisp-tests.el:
Check that the rounding functions signal Lisp errors correctly
when handed positive and negative infinity and NaN.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sun, 10 May 2015 19:07:09 +0100 |
| parents | 308d34e9f07d |
| children |
| rev | line source |
|---|---|
| 442 | 1 /* Generate a unique dump-id for use with the portable dumper. |
| 2 Copyright (C) 2000 Olivier Galibert, Martin Buchholz | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
|
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6 XEmacs is free software: you can redistribute it and/or modify it |
| 442 | 7 under the terms of the GNU General Public License as published by the |
|
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8 Free Software Foundation, either version 3 of the License, or (at your |
|
308d34e9f07d
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Mats Lidell <matsl@xemacs.org>
parents:
2367
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changeset
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9 option) any later version. |
| 442 | 10 |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
|
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17 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 442 | 18 |
| 19 #include <config.h> | |
| 20 #include <stdio.h> | |
| 21 #include <stdlib.h> | |
| 22 #include "../src/systime.h" | |
| 23 | |
| 24 #ifdef WIN32_NATIVE | |
| 25 #include <sys/timeb.h> | |
| 26 | |
| 27 /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ | |
| 28 void | |
| 29 gettimeofday (struct timeval *tv, struct timezone *tz) | |
| 30 { | |
| 31 struct _timeb tb; | |
| 32 _ftime (&tb); | |
| 33 | |
| 34 tv->tv_sec = tb.time; | |
| 35 tv->tv_usec = tb.millitm * 1000L; | |
| 36 if (tz) | |
| 37 { | |
| 38 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ | |
| 39 tz->tz_dsttime = tb.dstflag; /* type of dst correction */ | |
| 40 } | |
| 41 } | |
| 42 #endif | |
| 43 | |
| 44 /* Generates an (extremely) pseudo random number for the dump-id */ | |
| 45 static unsigned int | |
| 46 generate_dump_id (void) | |
| 47 { | |
| 48 EMACS_TIME thyme; | |
| 49 EMACS_GET_TIME (thyme); | |
| 50 | |
| 51 return (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme)); | |
| 52 } | |
| 53 | |
| 54 int | |
| 2367 | 55 main (int argc, char **argv) |
| 442 | 56 { |
| 57 FILE *f; | |
| 58 | |
| 59 if ((f = fopen ("dump-id.c", "w")) == NULL) | |
| 60 { | |
| 61 perror ("open dump-id.c"); | |
| 62 return EXIT_FAILURE; | |
| 63 } | |
| 64 | |
| 1688 | 65 /* dump_id is declared as extern "C" in dumper.h */ |
| 66 fputs ("extern\n", f); | |
| 67 fputs ("#ifdef __cplusplus\n", f); | |
| 68 fputs ("\"C\"\n", f); | |
| 69 fputs ("#endif\n", f); | |
| 70 fputs ("unsigned int dump_id;\n", f); | |
| 460 | 71 fprintf (f, "unsigned int dump_id = %uU;\n", generate_dump_id ()); |
| 442 | 72 |
| 73 if ((fclose (f)) != 0) | |
| 74 { | |
| 75 perror ("close dump-id.c"); | |
| 76 return EXIT_FAILURE; | |
| 77 } | |
| 78 | |
| 79 return EXIT_SUCCESS; | |
| 80 } |