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Mikael Djurfeldt 1999-07-25 19:26:55 +00:00
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commit 259529f27d
2 changed files with 33 additions and 6 deletions
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32
NEWS
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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 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. 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 *** Variable: SCM scm_var_random_state
Contains the vcell of the Scheme variable "*random-state*" which is Contains the vcell of the Scheme variable "*random-state*" which is
@ -1202,20 +1202,40 @@ level interface.
Example: 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. 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. 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. 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. 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): 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> 1999-07-25 Gary Houston <ghouston@easynet.co.uk>
* ports.c (scm_putc): fix line-buffering. * ports.c (scm_putc): fix line-buffering.