Retropikzel
/
foreign-c-srfis
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Remove SRFI-27

This commit is contained in:
retropikzel 2025-12-06 11:50:46 +02:00
parent bb256c9cdd
commit 9ac04dda71
6 changed files with 0 additions and 782 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

544
srfi/27.scm
View File

@ -1,544 +0,0 @@
; 54-BIT INTEGER IMPLEMENTATION OF THE "MRG32K3A"-GENERATOR
; =========================================================
;
; Sebastian.Egner@philips.com, Mar-2002.
;
; This file is an implementation of Pierre L'Ecuyer's MRG32k3a
; pseudo random number generator. Please refer to 'mrg32k3a.scm'
; for more information.
;
; compliance:
; Scheme R5RS with integers covering at least {-2^53..2^53-1}.
;
; history of this file:
; SE, 18-Mar-2002: initial version
; SE, 22-Mar-2002: comments adjusted, range added
; SE, 25-Mar-2002: pack/unpack just return their argument
; the actual generator
(define (mrg32k3a-random-m1 state)
(let ((x11 (vector-ref state 0))
(x12 (vector-ref state 1))
(x13 (vector-ref state 2))
(x21 (vector-ref state 3))
(x22 (vector-ref state 4))
(x23 (vector-ref state 5)))
(let ((x10 (modulo (- (* 1403580 x12) (* 810728 x13)) 4294967087))
(x20 (modulo (- (* 527612 x21) (* 1370589 x23)) 4294944443)))
(vector-set! state 0 x10)
(vector-set! state 1 x11)
(vector-set! state 2 x12)
(vector-set! state 3 x20)
(vector-set! state 4 x21)
(vector-set! state 5 x22)
(modulo (- x10 x20) 4294967087))))
; interface to the generic parts of the generator
(define (mrg32k3a-pack-state unpacked-state)
unpacked-state)
(define (mrg32k3a-unpack-state state)
state)
(define (mrg32k3a-random-range) ; m1
4294967087)
(define (mrg32k3a-random-integer state range) ; rejection method
(let* ((q (quotient 4294967087 range))
(qn (* q range)))
(do ((x (mrg32k3a-random-m1 state) (mrg32k3a-random-m1 state)))
((< x qn) (quotient x q)))))
(define (mrg32k3a-random-real state) ; normalization is 1/(m1+1)
(* 0.0000000002328306549295728 (+ 1.0 (mrg32k3a-random-m1 state))))
; GENERIC PART OF MRG32k3a-GENERATOR FOR SRFI-27
; ==============================================
;
; Sebastian.Egner@philips.com, 2002.
;
; This is the generic R5RS-part of the implementation of the MRG32k3a
; generator to be used in SRFI-27. It is based on a separate implementation
; of the core generator (presumably in native code) and on code to
; provide essential functionality not available in R5RS (see below).
;
; compliance:
; Scheme R5RS with integer covering at least {-2^53..2^53-1}.
; In addition,
; SRFI-23: error
;
; history of this file:
; SE, 22-Mar-2002: refactored from earlier versions
; SE, 25-Mar-2002: pack/unpack need not allocate
; SE, 27-Mar-2002: changed interface to core generator
; SE, 10-Apr-2002: updated spec of mrg32k3a-random-integer
; Generator
; =========
;
; Pierre L'Ecuyer's MRG32k3a generator is a Combined Multiple Recursive
; Generator. It produces the sequence {(x[1,n] - x[2,n]) mod m1 : n}
; defined by the two recursive generators
;
; x[1,n] = ( a12 x[1,n-2] + a13 x[1,n-3]) mod m1,
; x[2,n] = (a21 x[2,n-1] + a23 x[2,n-3]) mod m2,
;
; where the constants are
; m1 = 4294967087 = 2^32 - 209 modulus of 1st component
; m2 = 4294944443 = 2^32 - 22853 modulus of 2nd component
; a12 = 1403580 recursion coefficients
; a13 = -810728
; a21 = 527612
; a23 = -1370589
;
; The generator passes all tests of G. Marsaglia's Diehard testsuite.
; Its period is (m1^3 - 1)(m2^3 - 1)/2 which is nearly 2^191.
; L'Ecuyer reports: "This generator is well-behaved in all dimensions
; up to at least 45: ..." [with respect to the spectral test, SE].
;
; The period is maximal for all values of the seed as long as the
; state of both recursive generators is not entirely zero.
;
; As the successor state is a linear combination of previous
; states, it is possible to advance the generator by more than one
; iteration by applying a linear transformation. The following
; publication provides detailed information on how to do that:
;
; [1] P. L'Ecuyer, R. Simard, E. J. Chen, W. D. Kelton:
; An Object-Oriented Random-Number Package With Many Long
; Streams and Substreams. 2001.
; To appear in Operations Research.
;
; Arithmetics
; ===========
;
; The MRG32k3a generator produces values in {0..2^32-209-1}. All
; subexpressions of the actual generator fit into {-2^53..2^53-1}.
; The code below assumes that Scheme's "integer" covers this range.
; In addition, it is assumed that floating point literals can be
; read and there is some arithmetics with inexact numbers.
;
; However, for advancing the state of the generator by more than
; one step at a time, the full range {0..2^32-209-1} is needed.
; Required: Backbone Generator
; ============================
;
; At this point in the code, the following procedures are assumed
; to be defined to execute the core generator:
;
; (mrg32k3a-pack-state unpacked-state) -> packed-state
; (mrg32k3a-unpack-state packed-state) -> unpacked-state
; pack/unpack a state of the generator. The core generator works
; on packed states, passed as an explicit argument, only. This
; allows native code implementations to store their state in a
; suitable form. Unpacked states are #(x10 x11 x12 x20 x21 x22)
; with integer x_ij. Pack/unpack need not allocate new objects
; in case packed and unpacked states are identical.
;
; (mrg32k3a-random-range) -> m-max
; (mrg32k3a-random-integer packed-state range) -> x in {0..range-1}
; advance the state of the generator and return the next random
; range-limited integer.
; Note that the state is not necessarily advanced by just one
; step because we use the rejection method to avoid any problems
; with distribution anomalies.
; The range argument must be an exact integer in {1..m-max}.
; It can be assumed that range is a fixnum if the Scheme system
; has such a number representation.
;
; (mrg32k3a-random-real packed-state) -> x in (0,1)
; advance the state of the generator and return the next random
; real number between zero and one (both excluded). The type of
; the result should be a flonum if possible.
; Required: Record Data Type
; ==========================
;
; At this point in the code, the following procedures are assumed
; to be defined to create and access a new record data type:
;
; (:random-source-make a0 a1 a2 a3 a4 a5) -> s
; constructs a new random source object s consisting of the
; objects a0 .. a5 in this order.
;
; (:random-source? obj) -> bool
; tests if a Scheme object is a :random-source.
;
; (:random-source-state-ref s) -> a0
; (:random-source-state-set! s) -> a1
; (:random-source-randomize! s) -> a2
; (:random-source-pseudo-randomize! s) -> a3
; (:random-source-make-integers s) -> a4
; (:random-source-make-reals s) -> a5
; retrieve the values in the fields of the object s.
; Required: Current Time as an Integer
; ====================================
;
; At this point in the code, the following procedure is assumed
; to be defined to obtain a value that is likely to be different
; for each invokation of the Scheme system:
;
; (:random-source-current-time) -> x
; an integer that depends on the system clock. It is desired
; that the integer changes as fast as possible.
; Accessing the State
; ===================
(define (mrg32k3a-state-ref packed-state)
(cons 'lecuyer-mrg32k3a
(vector->list (mrg32k3a-unpack-state packed-state))))
(define (mrg32k3a-state-set external-state)
(define (check-value x m)
(if (and (integer? x)
(exact? x)
(<= 0 x (- m 1)))
#t
(error "illegal value" x)))
(if (and (list? external-state)
(= (length external-state) 7)
(eq? (car external-state) 'lecuyer-mrg32k3a))
(let ((s (cdr external-state)))
(check-value (list-ref s 0) mrg32k3a-m1)
(check-value (list-ref s 1) mrg32k3a-m1)
(check-value (list-ref s 2) mrg32k3a-m1)
(check-value (list-ref s 3) mrg32k3a-m2)
(check-value (list-ref s 4) mrg32k3a-m2)
(check-value (list-ref s 5) mrg32k3a-m2)
(if (or (zero? (+ (list-ref s 0) (list-ref s 1) (list-ref s 2)))
(zero? (+ (list-ref s 3) (list-ref s 4) (list-ref s 5))))
(error "illegal degenerate state" external-state))
(mrg32k3a-pack-state (list->vector s)))
(error "malformed state" external-state)))
; Pseudo-Randomization
; ====================
;
; Reference [1] above shows how to obtain many long streams and
; substream from the backbone generator.
;
; The idea is that the generator is a linear operation on the state.
; Hence, we can express this operation as a 3x3-matrix acting on the
; three most recent states. Raising the matrix to the k-th power, we
; obtain the operation to advance the state by k steps at once. The
; virtual streams and substreams are now simply parts of the entire
; periodic sequence (which has period around 2^191).
;
; For the implementation it is necessary to compute with matrices in
; the ring (Z/(m1*m1)*Z)^(3x3). By the Chinese-Remainder Theorem, this
; is isomorphic to ((Z/m1*Z) x (Z/m2*Z))^(3x3). We represent such a pair
; of matrices
; [ [[x00 x01 x02],
; [x10 x11 x12],
; [x20 x21 x22]], mod m1
; [[y00 y01 y02],
; [y10 y11 y12],
; [y20 y21 y22]] mod m2]
; as a vector of length 18 of the integers as writen above:
; #(x00 x01 x02 x10 x11 x12 x20 x21 x22
; y00 y01 y02 y10 y11 y12 y20 y21 y22)
;
; As the implementation should only use the range {-2^53..2^53-1}, the
; fundamental operation (x*y) mod m, where x, y, m are nearly 2^32,
; is computed by breaking up x and y as x = x1*w + x0 and y = y1*w + y0
; where w = 2^16. In this case, all operations fit the range because
; w^2 mod m is a small number. If proper multiprecision integers are
; available this is not necessary, but pseudo-randomize! is an expected
; to be called only occasionally so we do not provide this implementation.
(define mrg32k3a-m1 4294967087) ; modulus of component 1
(define mrg32k3a-m2 4294944443) ; modulus of component 2
(define mrg32k3a-initial-state ; 0 3 6 9 12 15 of A^16, see below
'#( 1062452522
2961816100
342112271
2854655037
3321940838
3542344109))
(define mrg32k3a-generators #f) ; computed when needed
(define (mrg32k3a-pseudo-randomize-state i j)
(define (product A B) ; A*B in ((Z/m1*Z) x (Z/m2*Z))^(3x3)
(define w 65536) ; wordsize to split {0..2^32-1}
(define w-sqr1 209) ; w^2 mod m1
(define w-sqr2 22853) ; w^2 mod m2
(define (lc i0 i1 i2 j0 j1 j2 m w-sqr) ; linear combination
(let ((a0h (quotient (vector-ref A i0) w))
(a0l (modulo (vector-ref A i0) w))
(a1h (quotient (vector-ref A i1) w))
(a1l (modulo (vector-ref A i1) w))
(a2h (quotient (vector-ref A i2) w))
(a2l (modulo (vector-ref A i2) w))
(b0h (quotient (vector-ref B j0) w))
(b0l (modulo (vector-ref B j0) w))
(b1h (quotient (vector-ref B j1) w))
(b1l (modulo (vector-ref B j1) w))
(b2h (quotient (vector-ref B j2) w))
(b2l (modulo (vector-ref B j2) w)))
(modulo
(+ (* (+ (* a0h b0h)
(* a1h b1h)
(* a2h b2h))
w-sqr)
(* (+ (* a0h b0l)
(* a0l b0h)
(* a1h b1l)
(* a1l b1h)
(* a2h b2l)
(* a2l b2h))
w)
(* a0l b0l)
(* a1l b1l)
(* a2l b2l))
m)))
(vector
(lc 0 1 2 0 3 6 mrg32k3a-m1 w-sqr1) ; (A*B)_00 mod m1
(lc 0 1 2 1 4 7 mrg32k3a-m1 w-sqr1) ; (A*B)_01
(lc 0 1 2 2 5 8 mrg32k3a-m1 w-sqr1)
(lc 3 4 5 0 3 6 mrg32k3a-m1 w-sqr1) ; (A*B)_10
(lc 3 4 5 1 4 7 mrg32k3a-m1 w-sqr1)
(lc 3 4 5 2 5 8 mrg32k3a-m1 w-sqr1)
(lc 6 7 8 0 3 6 mrg32k3a-m1 w-sqr1)
(lc 6 7 8 1 4 7 mrg32k3a-m1 w-sqr1)
(lc 6 7 8 2 5 8 mrg32k3a-m1 w-sqr1)
(lc 9 10 11 9 12 15 mrg32k3a-m2 w-sqr2) ; (A*B)_00 mod m2
(lc 9 10 11 10 13 16 mrg32k3a-m2 w-sqr2)
(lc 9 10 11 11 14 17 mrg32k3a-m2 w-sqr2)
(lc 12 13 14 9 12 15 mrg32k3a-m2 w-sqr2)
(lc 12 13 14 10 13 16 mrg32k3a-m2 w-sqr2)
(lc 12 13 14 11 14 17 mrg32k3a-m2 w-sqr2)
(lc 15 16 17 9 12 15 mrg32k3a-m2 w-sqr2)
(lc 15 16 17 10 13 16 mrg32k3a-m2 w-sqr2)
(lc 15 16 17 11 14 17 mrg32k3a-m2 w-sqr2)))
(define (power A e) ; A^e
(cond
((zero? e)
'#(1 0 0 0 1 0 0 0 1 1 0 0 0 1 0 0 0 1))
((= e 1)
A)
((even? e)
(power (product A A) (quotient e 2)))
(else
(product (power A (- e 1)) A))))
(define (power-power A b) ; A^(2^b)
(if (zero? b)
A
(power-power (product A A) (- b 1))))
(define A ; the MRG32k3a recursion
'#( 0 1403580 4294156359
1 0 0
0 1 0
527612 0 4293573854
1 0 0
0 1 0))
; check arguments
(if (not (and (integer? i)
(exact? i)
(integer? j)
(exact? j)))
(error "i j must be exact integer" i j))
; precompute A^(2^127) and A^(2^76) only once
(if (not mrg32k3a-generators)
(set! mrg32k3a-generators
(list (power-power A 127)
(power-power A 76)
(power A 16))))
; compute M = A^(16 + i*2^127 + j*2^76)
(let ((M (product
(list-ref mrg32k3a-generators 2)
(product
(power (list-ref mrg32k3a-generators 0)
(modulo i (expt 2 28)))
(power (list-ref mrg32k3a-generators 1)
(modulo j (expt 2 28)))))))
(mrg32k3a-pack-state
(vector
(vector-ref M 0)
(vector-ref M 3)
(vector-ref M 6)
(vector-ref M 9)
(vector-ref M 12)
(vector-ref M 15)))))
; True Randomization
; ==================
;
; The value obtained from the system time is feed into a very
; simple pseudo random number generator. This in turn is used
; to obtain numbers to randomize the state of the MRG32k3a
; generator, avoiding period degeneration.
(define (mrg32k3a-randomize-state state)
;; G. Marsaglia's simple 16-bit generator with carry
(let* ((m 65536)
(x (modulo (:random-source-current-time) m)))
(define (random-m)
(let ((y (modulo x m)))
(set! x (+ (* 30903 y) (quotient x m)))
y))
(define (random n) ; m < n < m^2
(modulo (+ (* (random-m) m) (random-m)) n))
; modify the state
(let ((m1 mrg32k3a-m1)
(m2 mrg32k3a-m2)
(s (mrg32k3a-unpack-state state)))
(mrg32k3a-pack-state
(vector
(+ 1 (modulo (+ (vector-ref s 0) (random (- m1 1))) (- m1 1)))
(modulo (+ (vector-ref s 1) (random m1)) m1)
(modulo (+ (vector-ref s 2) (random m1)) m1)
(+ 1 (modulo (+ (vector-ref s 3) (random (- m2 1))) (- m2 1)))
(modulo (+ (vector-ref s 4) (random m2)) m2)
(modulo (+ (vector-ref s 5) (random m2)) m2))))))
; Large Integers
; ==============
;
; To produce large integer random deviates, for n > m-max, we first
; construct large random numbers in the range {0..m-max^k-1} for some
; k such that m-max^k >= n and then use the rejection method to choose
; uniformly from the range {0..n-1}.
(define mrg32k3a-m-max
(mrg32k3a-random-range))
(define (mrg32k3a-random-power state k) ; n = m-max^k, k >= 1
(if (= k 1)
(mrg32k3a-random-integer state mrg32k3a-m-max)
(+ (* (mrg32k3a-random-power state (- k 1)) mrg32k3a-m-max)
(mrg32k3a-random-integer state mrg32k3a-m-max))))
(define (mrg32k3a-random-large state n) ; n > m-max
(do ((k 2 (+ k 1))
(mk (* mrg32k3a-m-max mrg32k3a-m-max) (* mk mrg32k3a-m-max)))
((>= mk n)
(let* ((mk-by-n (quotient mk n))
(a (* mk-by-n n)))
(do ((x (mrg32k3a-random-power state k)
(mrg32k3a-random-power state k)))
((< x a) (quotient x mk-by-n)))))))
; Multiple Precision Reals
; ========================
;
; To produce multiple precision reals we produce a large integer value
; and convert it into a real value. This value is then normalized.
; The precision goal is unit <= 1/(m^k + 1), or 1/unit - 1 <= m^k.
; If you know more about the floating point number types of the
; Scheme system, this can be improved.
(define (mrg32k3a-random-real-mp state unit)
(do ((k 1 (+ k 1))
(u (- (/ 1 unit) 1) (/ u mrg32k3a-m1)))
((<= u 1)
(/ (exact->inexact (+ (mrg32k3a-random-power state k) 1))
(exact->inexact (+ (expt mrg32k3a-m-max k) 1))))))
; Provide the Interface as Specified in the SRFI
; ==============================================
;
; An object of type random-source is a record containing the procedures
; as components. The actual state of the generator is stored in the
; binding-time environment of make-random-source.
(define (make-random-source)
(let ((state (mrg32k3a-pack-state ; make a new copy
(list->vector (vector->list mrg32k3a-initial-state)))))
(:random-source-make
(lambda ()
(mrg32k3a-state-ref state))
(lambda (new-state)
(set! state (mrg32k3a-state-set new-state)))
(lambda ()
(set! state (mrg32k3a-randomize-state state)))
(lambda (i j)
(set! state (mrg32k3a-pseudo-randomize-state i j)))
(lambda ()
(lambda (n)
(cond
((not (and (integer? n) (exact? n) (positive? n)))
(error "range must be exact positive integer" n))
((<= n mrg32k3a-m-max)
(mrg32k3a-random-integer state n))
(else
(mrg32k3a-random-large state n)))))
(lambda args
(cond
((null? args)
(lambda ()
(mrg32k3a-random-real state)))
((null? (cdr args))
(let ((unit (car args)))
(cond
((not (and (real? unit) (< 0 unit 1)))
(error "unit must be real in (0,1)" unit))
((<= (- (/ 1 unit) 1) mrg32k3a-m1)
(lambda ()
(mrg32k3a-random-real state)))
(else
(lambda ()
(mrg32k3a-random-real-mp state unit))))))
(else
(error "illegal arguments" args)))))))
(define random-source?
:random-source?)
(define (random-source-state-ref s)
((:random-source-state-ref s)))
(define (random-source-state-set! s state)
((:random-source-state-set! s) state))
(define (random-source-randomize! s)
((:random-source-randomize! s)))
(define (random-source-pseudo-randomize! s i j)
((:random-source-pseudo-randomize! s) i j))
; ---
(define (random-source-make-integers s)
((:random-source-make-integers s)))
(define (random-source-make-reals s . unit)
(apply (:random-source-make-reals s) unit))
; ---
(define default-random-source
(make-random-source))
(define random-integer
(random-source-make-integers default-random-source))
(define random-real
(random-source-make-reals default-random-source))

67
srfi/27.sld
View File

@ -1,67 +0,0 @@
; MODULE DEFINITION FOR SRFI-27
; =============================
;
; Sebastian.Egner@philips.com, Mar-2002, in Scheme 48 0.57
;
; This file contains the top-level definition for the 54-bit integer-only
; implementation of SRFI-27 for the Scheme 48 0.57 system.
;
; 1. The core generator is implemented in 'mrg32k3a-a.scm'.
; 2. The generic parts of the interface are in 'mrg32k3a.scm'.
; 3. The non-generic parts (record type, time, error) are here.
;
; creating the module:
; ,config ,load srfi-27-a.scm
;
; loading the module, once created:
; ,open srfi-27
;
; history of this file:
; SE, 22-Mar-2002: initial version
; SE, 27-Mar-2002: checked again
(define-library
(srfi 27)
(import (scheme base)
(scheme time))
(export random-integer
random-real
default-random-source
make-random-source
random-source?
random-source-state-ref
random-source-state-set!
random-source-randomize!
random-source-pseudo-randomize!
random-source-make-integers
random-source-make-reals)
#;(open
scheme-level-1
(subset srfi-9 (define-record-type))
(subset srfi-23 (error))
(subset posix-time (current-time))
(subset posix (time-seconds)))
(begin
(define-record-type :random-source
(:random-source-make
state-ref
state-set!
randomize!
pseudo-randomize!
make-integers
make-reals)
:random-source?
(state-ref :random-source-state-ref)
(state-set! :random-source-state-set!)
(randomize! :random-source-randomize!)
(pseudo-randomize! :random-source-pseudo-randomize!)
(make-integers :random-source-make-integers)
(make-reals :random-source-make-reals))
(define (:random-source-current-time)
(exact (floor (current-second)))))
;(include "mrg32k3a-a.scm")
;(include "mrg32k3a.scm")
(include "27.scm"))

165
srfi/27/LICENSE
View File

@ -1,165 +0,0 @@
GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:
a) under this License, provided that you make a good faith effort to
ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or
b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from
a header file that is part of the Library. You may convey such object
code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:
a) Give prominent notice with each copy of the object code that the
Library is used in it and that the Library and its use are
covered by this License.
b) Accompany the object code with a copy of the GNU GPL and this license
document.
4. Combined Works.
You may convey a Combined Work under terms of your choice that,
taken together, effectively do not restrict modification of the
portions of the Library contained in the Combined Work and reverse
engineering for debugging such modifications, if you also do each of
the following:
a) Give prominent notice with each copy of the Combined Work that
the Library is used in it and that the Library and its use are
covered by this License.
b) Accompany the Combined Work with a copy of the GNU GPL and this license
document.
c) For a Combined Work that displays copyright notices during
execution, include the copyright notice for the Library among
these notices, as well as a reference directing the user to the
copies of the GNU GPL and this license document.
d) Do one of the following:
0) Convey the Minimal Corresponding Source under the terms of this
License, and the Corresponding Application Code in a form
suitable for, and under terms that permit, the user to
recombine or relink the Application with a modified version of
the Linked Version to produce a modified Combined Work, in the
manner specified by section 6 of the GNU GPL for conveying
Corresponding Source.
1) Use a suitable shared library mechanism for linking with the
Library. A suitable mechanism is one that (a) uses at run time
a copy of the Library already present on the user's computer
system, and (b) will operate properly with a modified version
of the Library that is interface-compatible with the Linked
Version.
e) Provide Installation Information, but only if you would otherwise
be required to provide such information under section 6 of the
GNU GPL, and only to the extent that such information is
necessary to install and execute a modified version of the
Combined Work produced by recombining or relinking the
Application with a modified version of the Linked Version. (If
you use option 4d0, the Installation Information must accompany
the Minimal Corresponding Source and Corresponding Application
Code. If you use option 4d1, you must provide the Installation
Information in the manner specified by section 6 of the GNU GPL
for conveying Corresponding Source.)
5. Combined Libraries.
You may place library facilities that are a work based on the
Library side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:
a) Accompany the combined library with a copy of the same work based
on the Library, uncombined with any other library facilities,
conveyed under the terms of this License.
b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.
6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the
Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
conditions either of that published version or of any later version
published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser
General Public License, you may choose any version of the GNU Lesser
General Public License ever published by the Free Software Foundation.
If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shall
apply, that proxy's public statement of acceptance of any version is
permanent authorization for you to choose that version for the
Library.

0
srfi/27/README.md
View File

1
srfi/27/VERSION
View File

@ -1 +0,0 @@
0.1.0

5
srfi/27/test.scm
View File

@ -1,5 +0,0 @@
(random-source-randomize! default-random-source)
(display (random-integer 100))
(newline)