51 lines
916 B
C
51 lines
916 B
C
#include <stddef.h>
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#include <stdint.h>
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#include <ulib.h>
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int32_t rr(int32_t min, int32_t max) {
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if (max <= min)
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return min;
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uint32_t range = (uint32_t)(max - min + 1);
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uint32_t val;
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int32_t rnd;
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for (size_t i = 0; i < 10; i++) {
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rnd = rand();
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if (rnd == -1)
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continue;
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val = (uint32_t)rnd;
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uint32_t limit = (uint32_t)(-range) % range;
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if (val >= limit) {
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return min + (val % range);
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}
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}
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return -1;
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}
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void rc_rr(void) {
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if (argslen() < 3) {
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uprintf("rc: Not enough arguments\n");
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return;
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}
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char *beginstr = *(args()+1);
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char *endstr = *(args()+2);
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char *endb;
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long begin = string_conv_strtol(beginstr, &endb, 10);
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char *ende;
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long end = string_conv_strtol(endstr, &ende, 10);
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int32_t r = rr(begin, end);
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if (rr == -1) {
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uprintf("rc: failed to generate random number in range\n");
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return;
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}
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uprintf("%d\n", r);
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}
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