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Mikael Djurfeldt 1999-07-25 19:26:55 +00:00
parent 9b741bb6da
commit 259529f27d
2 changed files with 33 additions and 6 deletions
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32
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@ -1193,7 +1193,7 @@ These functions use the current RNG through the scm_the_rng interface.
It might be a good idea to use these functions from your C code so
that only one random generator is used by all code in your program.
You can get the default random state using:
The default random state is stored in:
*** Variable: SCM scm_var_random_state
Contains the vcell of the Scheme variable "*random-state*" which is
@ -1202,20 +1202,40 @@ level interface.
Example:
double x = scm_i_uniform01 (SCM_RSTATE (SCM_CDR (scm_var_random_state)));
double x = scm_c_uniform01 (SCM_RSTATE (SCM_CDR (scm_var_random_state)));
*** Function: double scm_i_uniform01 (scm_rstate *STATE)
*** Function: scm_rstate *scm_c_default_rstate (void)
This is a convenience function which returns the value of
scm_var_random_state. An error message is generated if this value
isn't a random state.
*** Function: scm_rstate *scm_c_make_rstate (char *SEED, int LENGTH)
Make a new random state from the string SEED of length LENGTH.
It is generally not a good idea to use multiple random states in a
program. While subsequent random numbers generated from one random
state are guaranteed to be reasonably independent, there is no such
guarantee for numbers generated from different random states.
*** Macro: unsigned long scm_c_uniform32 (scm_rstate *STATE)
Return 32 random bits.
*** Function: double scm_c_uniform01 (scm_rstate *STATE)
Return a sample from the uniform(0,1) distribution.
*** Function: double scm_i_normal01 (scm_rstate *STATE)
*** Function: double scm_c_normal01 (scm_rstate *STATE)
Return a sample from the normal(0,1) distribution.
*** Function: double scm_i_exp1 (scm_rstate *STATE)
*** Function: double scm_c_exp1 (scm_rstate *STATE)
Return a sample from the exp(1) distribution.
*** Function: unsigned long scm_i_random (unsigned long M, scm_rstate *STATE)
*** Function: unsigned long scm_c_random (scm_rstate *STATE, unsigned long M)
Return a sample from the discrete uniform(0,M) distribution.
*** Function: SCM scm_c_random_bignum (scm_rstate *STATE, SCM M)
Return a sample from the discrete uniform(0,M) distribution.
M must be a bignum object. The returned value may be an INUM.
Changes in Guile 1.3 (released Monday, October 19, 1998):

7
libguile/ChangeLog
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@ -1,3 +1,10 @@
1999-07-25 Mikael Djurfeldt <mdj@thalamus.nada.kth.se>
* random.c, random.h (scm_c_default_rstate, scm_c_uniform32):
Added.
Renamed functions in the random function library interface
from scm_i_XXX --> scm_c_XXX.
1999-07-25 Gary Houston <ghouston@easynet.co.uk>
* ports.c (scm_putc): fix line-buffering.