Program to extract Arena Ids from MTGJson dataset

json.c

#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

typedef struct Card
{
    int id;
    char name[128];
} Card;

Card cards[10000];

int main()
{
    int fd = open("AllPrintings.json", O_RDONLY);
    if (fd == -1)
    {
        puts("Failed to open file");
        return 1;
    }
    struct stat fileInfo;
    if (fstat(fd, &fileInfo) != 0)
    {
        puts("fstat failed");
        close(fd);
        return 1;
    }
    char *log = malloc(fileInfo.st_size);
    if (log == NULL)
    {
        puts("malloc failed");
        close(fd);
        return 1;
    }
    if (read(fd, log, fileInfo.st_size) != fileInfo.st_size)
    {
        puts("read failed");
        close(fd);
        return 1;
    }
    close(fd);
    const char *arenaId = "mtgArenaId";
    const char *name = "name";
    int numCards = 0;
    for (int i = 0; i < fileInfo.st_size - 9; i++)
    {
        if (memcmp(arenaId, &log[i], 10) == 0)
        {
            i += 14;
            char id[8];
            int j = 0;
            while (log[i] > 47 && log[i] < 58)
            {
                id[j] = log[i];
                i++;
                j++;
            }
            id[j] = 0;
            cards[numCards].id = atoi(id);
            while (memcmp(name, &log[i], 4) != 0)
            {
                i++;
            }
            i += 8;
            j = 0;
            while (log[i] != '"')
            {
                cards[numCards].name[j] = log[i];
                i++;
                j++;
            }
            cards[numCards].name[j] = 0;
            numCards++;
        }
    }
    free(log);
    // Bubble sort by id
    for (int i = 0; i < numCards - 1; i++)
    {
        bool sorted = true;
        for (int j = 0; j < numCards - 1; j++)
        {
            if (cards[j].id > cards[j + 1].id)
            {
                Card temp = cards[j];
                cards[j] = cards[j + 1];
                cards[j + 1] = temp;
                sorted = false;
            }
        }
        if (sorted)
        {
            break;
        }
    }
    // Remove true duplicates
    for (int i = 0; i < numCards - 1; i++)
    {
        if (cards[i].id == cards[i + 1].id && strcmp(cards[i].name, cards[i + 1].name) == 0)
        {
            for (int j = i + 1; j < numCards - 1; j++)
            {
                cards[j] = cards[j + 1];
            }
            numCards--;
        }
        printf("%d %s\n", cards[i].id, cards[i].name);
    }
    printf("%d %s\n", cards[numCards - 1].id, cards[numCards - 1].name);
    // Print duplicate ids with different cards names (not sure why these exist, maybe an error in mtgjson dataset?)
    puts("\nDuplicates with different card names:\n");
    for (int i = 0; i < numCards - 1; i++)
    {
        if (cards[i].id == cards[i + 1].id)
        {
            printf("%d %s\n%d %s\n", cards[i].id, cards[i].name, cards[i + 1].id, cards[i + 1].name);
        }
    }
    return 0;
}