#include "String.h"
#include <string.h>

String * String_new(const char * s)
{
    size_t size = strlen(s);
    return String_new_size(s, size);
}

String * String_new_size(const char * s, size_t size)
{
    String * new_st = (String *)malloc(sizeof(String));
    char * smem = (char *)malloc(size + 1u);
    memcpy(smem, s, size);
    smem[size] = '\0';
    new_st->value = smem;
    new_st->size = size;
    return new_st;
}

String * String_plus(const String * st, const char * s)
{
    String * new_st = (String *)malloc(sizeof(String));
    size_t size1 = st->size;
    size_t size2 = strlen(s);
    size_t size = size1 + size2;
    char * smem = (char *)malloc(size + 1u);
    memcpy(smem, st->value, size1);
    memcpy(&smem[size1], s, size2);
    smem[size] = '\0';
    new_st->value = smem;
    new_st->size = size;
    return new_st;
}

String * String_concat(String * st, const char * s)
{
    size_t size2 = strlen(s);
    size_t size = st->size + size2;
    char * smem = (char *)malloc(size + 1u);
    memcpy(smem, st->value, st->size);
    memcpy(&smem[st->size], s, size2);
    smem[size] = '\0';
    st->value = smem;
    st->size = size;
    return st;
}

void String_free(String * st)
{
    free(st->value);
    free(st);
}