debian/modules/nginx-development-kit/src/ndk_parse.h

#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)

#define ndk_str3_cmp(m, c0, c1, c2, c3)                                       \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)

#define ndk_str3Ocmp(m, c0, c1, c2, c3)                                       \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)

#define ndk_str4cmp(m, c0, c1, c2, c3)                                        \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)

#define ndk_str5cmp(m, c0, c1, c2, c3, c4)                                    \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)             \
        && m[4] == c4

#define ndk_str6cmp(m, c0, c1, c2, c3, c4, c5)                                \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)             \
        && (((uint32_t *) m)[1] & 0xffff) == ((c5 << 8) | c4)

#define ndk_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7)                       \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)             \
        && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)

#define ndk_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7)                        \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)             \
        && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)

#define ndk_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8)                    \
    *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)             \
        && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)  \
        && m[8] == c8

#else /* !(NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) */

#define ndk_str3_cmp(m, c0, c1, c2, c3)                                       \
    m[0] == c0 && m[1] == c1 && m[2] == c2

#define ndk_str3Ocmp(m, c0, c1, c2, c3)                                       \
    m[0] == c0 && m[2] == c2 && m[3] == c3

#define ndk_str4cmp(m, c0, c1, c2, c3)                                        \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3

#define ndk_str5cmp(m, c0, c1, c2, c3, c4)                                    \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 && m[4] == c4

#define ndk_str6cmp(m, c0, c1, c2, c3, c4, c5)                                \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3                      \
        && m[4] == c4 && m[5] == c5

#define ndk_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7)                       \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3                      \
        && m[4] == c4 && m[5] == c5 && m[6] == c6

#define ndk_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7)                        \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3                      \
        && m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7

#define ndk_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8)                    \
    m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3                      \
        && m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7 && m[8] == c8

#endif