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#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
FILE *in_file;
FILE *out_file;
size_t titles;
size_t **linko;
size_t *linkos;
size_t **linki;
size_t *linkis;
size_t link_titles_done = 0;
size_t i;
/*
* Read all outgoing links into memory
*/
in_file = fopen("links-outgoing.bin", "rb");
fread(&titles, sizeof(titles), 1, in_file);
linko = malloc(titles * sizeof(size_t*));
linkos = malloc(titles * sizeof(size_t));
for (i = 0; i < titles; i++) {
size_t j;
fread(&linkos[i], sizeof(linkos[i]), 1, in_file);
linko[i] = malloc(linkos[i] * sizeof(linko[i][0]));
for (j = 0; j < linkos[i]; j++) {
fread(&linko[i][j], sizeof(linko[i][j]), 1, in_file);
}
}
fclose(in_file);
printf("Outgoing links read.\n");
linki = malloc(titles * sizeof(size_t*));
linkis = malloc(titles * sizeof(size_t));
for (i = 0; i < titles; i++) {
size_t j;
for (j = 0; j < linkos[i]; j++) {
size_t x = linko[i][j];
linkis[x]++;
linki[x] = realloc(linki[x], linkis[x] * sizeof(linki[x][0]));
linki[x][linkis[x] - 1] = i;
}
}
printf("Links turned upside down.\n");
out_file = fopen("links-incoming.bin", "wb");
fwrite(&titles, sizeof(titles), 1, out_file);
for (i = 0; i < titles; i++) {
size_t j;
fwrite(&linkis[i], sizeof(linkis[i]), 1, out_file);
for (j = 0; j < linkis[i]; j++) {
fwrite(&linki[i][j], sizeof(linki[i][j]), 1, out_file);
}
}
fclose(out_file);
printf("Incoming links written.\n");
}
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