44 lines
791 B
C
44 lines
791 B
C
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/*
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* Copyright (C) Artsiom D.
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* Copyright (C) shit-co.de
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "chart.h"
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#include "util.h"
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struct chart
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new_chart(unsigned int length)
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{
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unsigned int i;
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double price;
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struct chart chart;
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chart.prices = emalloc(sizeof(double) * length);
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chart.length = length;
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/* populate with random prices */
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price = 10;
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for (i = 0; i < length; i++) {
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chart.prices[i] = price;
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price += (double)rand() / RAND_MAX * 4 - 2;
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}
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return chart;
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}
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void
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update_chart(struct chart *chart)
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{
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memmove(chart->prices, chart->prices + 1, (chart->length - 1) * sizeof(double));
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chart->prices[chart->length - 1] = chart->prices[chart->length - 2] + (double)rand() / RAND_MAX * 4 - 2;
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}
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