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annotate src/ploki/random.c @ 12508:335a2a849232 draft default tip

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<wib_jonas> `` f=/hackenv/bin/dateu; >$f echo $\'#!/bin/bash\\nset -e\\nif (( 1 < $# )); then echo "dateu error: too many command-line arguments. Usage: dateu datetimestring"; exit 2; fi\\nexec date -u ${1:+-d "$1"} "+%Y-%m-%d %H:%M:%S.%3N %z %Z %B %-e %A %G-W%V-%u"\'; chmod a+x "$f"
author HackEso <hackeso@esolangs.org>
date Wed, 03 Jul 2024 18:15:24 +0100
parents ac0403686959
children
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ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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1 #include "config.h"
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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2 #include "random.h"
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3
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <time.h>
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7
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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8 void randseed(void) {
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9 unsigned seed;
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10
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11 seed = time(NULL);
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12 #if HAVE_DEV_URANDOM_P
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13 {
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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14 FILE *fp;
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15
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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16 if ((fp = fopen("/dev/urandom", "rb"))) {
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17 fread(&seed, sizeof seed, 1, fp);
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18 fclose(fp);
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19 }
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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20 }
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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21 #endif
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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22 srand(seed);
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23 }
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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24
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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25 double randval(void) {
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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26 return rand() / (RAND_MAX + 1.0);
ac0403686959 <oerjan> rm -rf src/ploki; mv ploki src
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27 }