tb_char_t const* tb_string_strip(tb_string_ref_t string, tb_size_t n)
{
// check
tb_assert_and_check_return_val(string, tb_null);
// out?
tb_check_return_val(n < tb_string_size(string), tb_string_cstr(string));
// strip
tb_char_t* p = (tb_char_t*)tb_buffer_resize(string, n + 1);
if (p) p[n] = '\0';
// ok?
return p;
}
tb_byte_t* tb_buffer_memncpyp(tb_buffer_t* buffer, tb_size_t p, tb_byte_t const* b, tb_size_t n)
{
// check
tb_assert_and_check_return_val(buffer && b, tb_null);
// check
tb_check_return_val(n, tb_buffer_data(buffer));
// resize
tb_byte_t* d = tb_buffer_resize(buffer, p + n);
tb_assert_and_check_return_val(d, tb_null);
// copy it
tb_memcpy(d + p, b, n);
// ok
return d;
}
tb_byte_t* tb_buffer_memnsetp(tb_buffer_t* buffer, tb_size_t p, tb_byte_t b, tb_size_t n)
{
// check
tb_assert_and_check_return_val(buffer, tb_null);
// check
tb_check_return_val(n, tb_buffer_data(buffer));
// resize
tb_byte_t* d = tb_buffer_resize(buffer, p + n);
tb_assert_and_check_return_val(d, tb_null);
// memset
tb_memset(d + p, b, n);
// ok?
return d;
}
tb_byte_t* tb_buffer_memncat(tb_buffer_t* buffer, tb_byte_t const* b, tb_size_t n)
{
// check
tb_assert_and_check_return_val(buffer && b, tb_null);
// check
tb_check_return_val(n, tb_buffer_data(buffer));
// is null?
tb_size_t p = tb_buffer_size(buffer);
if (!p) return tb_buffer_memncpy(buffer, b, n);
// resize
tb_byte_t* d = tb_buffer_resize(buffer, p + n);
tb_assert_and_check_return_val(d, tb_null);
// memcat
tb_memcpy(d + p, b, n);
// ok?
return d;
}
tb_byte_t* tb_buffer_memnmovp(tb_buffer_t* buffer, tb_size_t p, tb_size_t b, tb_size_t n)
{
// check
tb_assert_and_check_return_val(buffer && (b + n) <= tb_buffer_size(buffer), tb_null);
// clear?
if (b == tb_buffer_size(buffer))
{
tb_buffer_clear(buffer);
return tb_buffer_data(buffer);
}
// check
tb_check_return_val(p != b && n, tb_buffer_data(buffer));
// resize
tb_byte_t* d = tb_buffer_resize(buffer, p + n);
tb_assert_and_check_return_val(d, tb_null);
// memmov
tb_memmov(d + p, d + b, n);
return d;
}