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author | Jim Meyering <meyering@redhat.com> | 2007-09-01 09:54:45 +0200 |
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committer | Jim Meyering <meyering@redhat.com> | 2007-10-07 19:43:35 +0200 |
commit | 58a7ead41d056909784bfab9323c5f44f577d3d0 (patch) | |
tree | ea0f1849f46529be4cac93d09f1b4f6f85f53255 /gl/lib/randint.h | |
parent | 696f4a8042e11f6caf479f729b09dcae2700e541 (diff) | |
download | coreutils-58a7ead41d056909784bfab9323c5f44f577d3d0.tar.xz |
Convert coreutils' rand*.{c,h,m4} into modules.
First step: move these files to gl/lib:
* lib/rand-isaac.c, lib/rand-isaac.h
* lib/randint.c, lib/randint.h
* lib/randperm.c, lib/randperm.h
* lib/randread.c, lib/randread.h
Step 2: add modules/rand* and remove now-unneeded .m4 files.
* gl/modules/randint: New file.
* gl/modules/randperm: New file.
* gl/modules/randread: New file.
* m4/randint.m4: Remove file.
* m4/randperm.m4: Remove file.
* m4/randread.m4: Remove file.
Step 3: use the new modules
* bootstrap.conf (gnulib_modules): Add randint and randperm.
* m4/prereq.m4 (gl_RANDINT, gl_RANDREAD, gl_RANDPERM): Don't require;
These have been removed.
(gl_ROOT_DEV_INO): Don't require; already handled via bootstrap.conf.
Diffstat (limited to 'gl/lib/randint.h')
-rw-r--r-- | gl/lib/randint.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/gl/lib/randint.h b/gl/lib/randint.h new file mode 100644 index 000000000..1e96ccb50 --- /dev/null +++ b/gl/lib/randint.h @@ -0,0 +1,51 @@ +/* Generate random integers. + + Copyright (C) 2006 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Paul Eggert. */ + +#ifndef RANDINT_H + +# define RANDINT_H 1 + +# include <stdint.h> + +# include "randread.h" + +/* An unsigned integer type, used for random integers, and its maximum + value. */ +typedef uintmax_t randint; +# define RANDINT_MAX UINTMAX_MAX + +struct randint_source; + +struct randint_source *randint_new (struct randread_source *); +struct randint_source *randint_all_new (char const *, size_t); +struct randread_source *randint_get_source (struct randint_source const *); +randint randint_genmax (struct randint_source *, randint genmax); + +/* Consume random data from *S to generate a random number in the range + 0 .. CHOICES-1. CHOICES must be nonzero. */ +static inline randint +randint_choose (struct randint_source *s, randint choices) +{ + return randint_genmax (s, choices - 1); +} + +void randint_free (struct randint_source *); +int randint_all_free (struct randint_source *); + +#endif |