64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <time.h>
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#include <assert.h>
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#define GET_CLOCK() ((float)clock() / CLOCKS_PER_SEC)
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typedef uint32_t Node;
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typedef struct {
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uint8_t* edges;
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uint32_t const node_count;
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} Bandmatrix;
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Bandmatrix bm_Create(uint32_t node_count) {
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uint8_t* edges = malloc(sizeof(uint8_t) * node_count * node_count);
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for(uint32_t i = 0; i < node_count*node_count; i++) {
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edges[i] = 0;
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}
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return (Bandmatrix){ edges, node_count };
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}
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void bm_AddEdge(Bandmatrix b, Node nodefrom, Node nodeto) {
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b.edges[nodefrom * b.node_count + nodeto] = 1;
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}
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void bm_RemoveEdge(Bandmatrix b, Node nodefrom, Node nodeto) {
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b.edges[nodefrom * b.node_count + nodeto] = 0;
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}
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int bm_TestEdge(Bandmatrix b, Node nodefrom, Node nodeto) {
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return b.edges[nodefrom * b.node_count + nodeto];
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}
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void bm_Free(Bandmatrix b) {
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free(b.edges);
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}
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int main( int argc, char *argv[] ) {
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Bandmatrix b = bm_Create(1000);
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float start, end;
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start = GET_CLOCK();
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for(Node i = 0; i < 1000; i++) {
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bm_AddEdge(b,i,i);
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for(Node j = i+1; j < i+49 && j < 1000; j++) {
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bm_AddEdge(b,i,j);
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bm_AddEdge(b,j,i);
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}
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}
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end = GET_CLOCK();
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printf("%.3f msecs\n", (end-start) * 1e3);
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bm_Free(b);
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return 0;
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}
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