C（嵌入式）：为源文件提供唯一 ID

嵌入式 C：为源文件提供唯一 ID

c
#include 
#include 
#include 
#include 
// CRC32 算法实现
uint32_t crc32(uint8_t *data, size_t len)
{
    uint32_t crc = 0xFFFFFFFF;
    for (size_t i = 0; i < len; i++) {
        crc ^= data[i];
        for (int j = 0; j < 8; j++) {
            crc = (crc >> 1) ^ ((crc & 1) ? 0xEDB88320 : 0);
        }
    }
    return ~crc;
}
// 为源文件生成唯一 ID
void generateUniqueID(const char *filename)
{
    FILE *file = fopen(filename, "rb");
    if (file == NULL) {
        printf("无法打开文件：%s\n", filename);
        return;
    }
    fseek(file, 0, SEEK_END);
    long fileSize = ftell(file);
    fseek(file, 0, SEEK_SET);
    uint8_t *buffer = (uint8_t *)malloc(fileSize);
    if (buffer == NULL) {
        printf("内存分配失败\n");
        fclose(file);
        return;
    }
    size_t bytesRead = fread(buffer, 1, fileSize, file);
    if (bytesRead != fileSize) {
        printf("读取文件失败\n");
        free(buffer);
        fclose(file);
        return;
    }
    uint32_t uniqueID = crc32(buffer, fileSize);
    printf("源文件的唯一 ID 是：%08X\n", uniqueID);
    free(buffer);
    fclose(file);
}
int main()
{
    const char *filename = "example.c";
    generateUniqueID(filename);
    return 0;
}