/* On Mac OS-X (10.5, at least) errno is not set to ENAMETOOLONG in
* the case where the buffer is smaller than the hostname length.
*
* So, we must establish this for ourselves, as follows:
*/
int pantheios_gethostname_with_errno_fix_(pan_char_t* buffer, size_t cchBuffer)
{
int res = gethostname(&buffer[0], cchBuffer);
if(0 != cchBuffer)
{
size_t n2 = pan_strlen_(buffer);
if(n2 + 1 < cchBuffer)
{
errno = 0;
}
else
{
errno = ENAMETOOLONG;
res = -1;
}
}
return res;
}
static size_t pantheios_getHostName_body_(pan_char_t* buffer, size_t cchBuffer)
{
#if defined(PLATFORMSTL_OS_IS_UNIX)
if(0 == cchBuffer)
{
errno = ENAMETOOLONG;
return 0;
}
else
{
int res;
PANTHEIOS_CONTRACT_ENFORCE_ASSUMPTION(NULL != buffer);
/* First, we mark the last available character in the buffer with
* the nul terminator, to test later
*/
buffer[cchBuffer - 1] = '\0';
errno = 0;
res = gethostname(&buffer[0], cchBuffer);
/* Test for ENAMETOOLONG, to avoid any implementation-dependent
* behaviour wrt whether this it is set on a 0 or a -1 return
*/
if(ENAMETOOLONG == errno)
{
/* To homogenise platform behaviour, we ensure that no fragment is filled out */
buffer[0] = '\0';
return cchBuffer;
}
else
{
if(0 != res)
{
/* Was a failure, so return 0 */
return 0;
}
else if('\0' != buffer[cchBuffer - 1])
{
/* Was insufficient buffer, so we return the given size (which is the
* failure indicator for that condition
*
* Also, to homogenise platform behaviour, we ensure that no fragment
* of the buffer is returned as filled out.
*/
buffer[0] = '\0';
return cchBuffer;
}
else
{
/* Buffer was sufficient, and the value has been written. The only
* way to return the length is to do strlen on it
*/
return pan_strlen_(buffer);
}
}
}
#elif defined(PLATFORMSTL_OS_IS_WINDOWS)
DWORD cchSize = stlsoft_static_cast(DWORD, cchBuffer);
if(!pan_GetComputerName_(&buffer[0], &cchSize))
{
DWORD err = GetLastError();
if(ERROR_BUFFER_OVERFLOW == err)
{
return cchBuffer;
}
else
{
return 0;
}
}
else
{
return cchSize;
}
#else /* ? PLATFORMSTL_OS_IS_???? */
# error Platform not discriminated
#endif /* PLATFORMSTL_OS_IS_???? */
}
size_t pantheios_getHostName(pan_char_t* buffer, size_t cchBuffer)
{
size_t res;
/* Preconditions */
PANTHEIOS_CONTRACT_ENFORCE_PRECONDITION_PARAMS_API((0 == cchBuffer || NULL != buffer), "character buffer pointer may only be null if the indicated size is 0");
/* Body */
res = pantheios_getHostName_body_(buffer, cchBuffer);
/* Postconditions */
PANTHEIOS_CONTRACT_ENFORCE_POSTCONDITION_STATE_API(res <= cchBuffer, "the result must not exceed the buffer length");
PANTHEIOS_CONTRACT_ENFORCE_POSTCONDITION_STATE_API((0 == res || cchBuffer == res || pan_strlen_(buffer) < cchBuffer), "the result must be 0, or the buffer must be zero, or the length of the written string is less than the buffer length");
return res;
}
void interval::construct_()
{
m_result.reserve(20);
interval::units units = m_units;
pan_sint64_t interval = m_interval;
if(0 == interval)
{
static pan_char_t const* const s_zeroes[] =
{
NULL
, PANTHEIOS_LITERAL_STRING("0 us")
, PANTHEIOS_LITERAL_STRING("0 ms")
, PANTHEIOS_LITERAL_STRING("0 s")
, PANTHEIOS_LITERAL_STRING("0 mins")
, PANTHEIOS_LITERAL_STRING("0 hrs")
, PANTHEIOS_LITERAL_STRING("0 days")
};
pan_char_t const* const ptr = s_zeroes[units];
size_t const len = pan_strlen_(ptr);
m_result.assign(ptr, len);
}
else
{
pan_char_t const* u = NULL;
switch(units)
{
case microseconds:
if(0 != (interval % 1000))
{
u = PANTHEIOS_LITERAL_STRING("us");
}
else
{
interval /= 1000;
case milliseconds:
if(0 != (interval % 1000))
{
u = PANTHEIOS_LITERAL_STRING("ms");
}
else
{
interval /= 1000;
case seconds:
if(0 != (interval % 60))
{
u = PANTHEIOS_LITERAL_STRING("s");
}
else
{
interval /= 60;
case minutes:
if(0 != (interval % 60))
{
u = (1 == interval) ? PANTHEIOS_LITERAL_STRING("min") : PANTHEIOS_LITERAL_STRING("mins");
}
else
{
interval /= 60;
case hours:
if(0 != (interval % 24))
{
u = (1 == interval) ? PANTHEIOS_LITERAL_STRING("hr") : PANTHEIOS_LITERAL_STRING("hrs");
}
else
{
interval /= 24;
case days:
u = (1 == interval) ? PANTHEIOS_LITERAL_STRING("day") : PANTHEIOS_LITERAL_STRING("days");
}
}
}
}
break;
}
}
STLSOFT_ASSERT(NULL != u);
pan_char_t buf[21];
size_t cch;
#ifdef PANTHEIOS_STLSOFT_1_12_OR_LATER
pan_char_t const* const num = stlsoft::integer_to_decimal_string(buf, STLSOFT_NUM_ELEMENTS(buf), interval, &cch);
#else /* ? PANTHEIOS_STLSOFT_1_12_OR_LATER */
pan_char_t const* const num = stlsoft::integer_to_string(buf, STLSOFT_NUM_ELEMENTS(buf), interval, cch);
#endif /* PANTHEIOS_STLSOFT_1_12_OR_LATER */
m_result.assign(num, cch);
m_result.append(1, ' ');
m_result.append(u);
}
}
