#include <stdio.h>
#include <stdint.h>

#include <morphisms/length-prefix.h>

void length_prefix_uint64_array_clear(
    struct LengthPrefixUInt64Array * data
) {
    data->len = 0;
}

void length_prefix_uint64_array_push(
    struct LengthPrefixUInt64Array * data,
    uint64_t value
) {
    data->items[ data->len ] = value;
    data->len += 1;
}

int length_prefix_uint64_array_reverse(
    struct LengthPrefixUInt64Array const * restrict src,
    struct LengthPrefixUInt64Array * restrict dst
) {
    dst->len = src->len;
    for(uint64_t i = 0; i < src->len; ++i) {
        dst->items[i] = src->items[src->len - i - 1];
    }
    return 0;
}

int length_prefix_array_map_64_to_64(
    int (*f) ( uint64_t const * restrict, uint64_t * restrict ),
    struct LengthPrefixUInt64Array const * restrict src,
    struct LengthPrefixUInt64Array * restrict dst
) {
    dst->len = src->len;
    for( uint64_t i = 0; i < src->len; ++i ) {
        int result = f( &src->items[i], &dst->items[i] );
        if( result ) {
            return result;
        }
    }
    return 0;
}

int length_prefix_array_map_8_to_64(
    int (*f) ( uint8_t const * restrict, uint64_t * restrict ),
    struct LengthPrefixUInt8Array const * restrict src,
    struct LengthPrefixUInt64Array * restrict dst
) {
    dst->len = src->len;
    for( uint64_t i = 0; i < src->len; ++i ) {
        int result = f( &src->items[i], &dst->items[i] );
        if( result ) {
            return result;
        }
    }
    return 0;
}

int length_prefix_array_map_64_to_8(
    int (*f) ( uint64_t const * restrict, uint8_t * restrict ),
    struct LengthPrefixUInt64Array const * restrict src,
    struct LengthPrefixUInt8Array * restrict dst
) {
    dst->len = src->len;
    for( uint64_t i = 0; i < src->len; ++i ) {
        int result = f( &src->items[i], &dst->items[i] );
        if( result ) {
            return result;
        }
    }
    return 0;
}

void length_prefix_uint64_array_dump(
    struct LengthPrefixUInt64Array const * data
) {
    printf("Len = %d, [", data->len);
    for( uint64_t i = 0; i < data->len; ++i ) {
        printf("%d; ", data->items[i]);
    }
    printf("]\n");
}




void length_prefix_uint8_array_clear(
    struct LengthPrefixUInt8Array * data
) {
    data->len = 0;
}

void length_prefix_uint8_array_push(
    struct LengthPrefixUInt8Array * data,
    uint8_t value
) {
    data->items[ data->len ] = value;
    data->len += 1;
}

int length_prefix_uint8_array_reverse(
    struct LengthPrefixUInt8Array const * restrict src,
    struct LengthPrefixUInt8Array * restrict dst
) {
    dst->len = src->len;
    for(uint64_t i = 0; i < src->len; ++i) {
        dst->items[i] = src->items[src->len - i - 1];
    }
    return 0;
}

void length_prefix_uint8_array_dump(
    struct LengthPrefixUInt8Array const * data
) {
    printf("Len = %d, [", data->len);
    for( uint64_t i = 0; i < data->len; ++i ) {
        printf("%d; ", data->items[i]);
    }
    printf("]\n");
}

int morph_string_as_nullterm_to_length_prefix(
    char const * restrict src,
    struct LengthPrefixUInt8Array * restrict dst
) {
    length_prefix_uint8_array_clear(dst);
    while( *src ) {
        length_prefix_uint8_array_push(dst, *src);
        src++;
    }

    return 0;
}

int morph_string_as_length_prefix_to_nullterm(
    struct LengthPrefixUInt8Array const * restrict src,
    char * restrict dst
) {
    for( uint64_t i = 0; i < src->len; ++i ) {
        *dst ++ = src->items[i];
    }
    *dst = '\0';

    return 0;
}