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Moving write errors out of return value into separate API methods.

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write(), print(), println() now return size_t (and don't use negative values to signal errors).
Print adds writeError() for checking for write errors, clearWriteError() to reset the flag to false, and a protected setWriteError() for signalling errors.

http://code.google.com/p/arduino/issues/detail?id=598
This commit is contained in:
David A. Mellis
2011-08-26 16:08:14 -04:00
parent 929597375b
commit b73cf39d94
23 changed files with 184 additions and 173 deletions
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10
libraries/Ethernet/IPAddress.cpp
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@ -42,15 +42,15 @@ bool IPAddress::operator==(const uint8_t* addr)
return memcmp(addr, _address, sizeof(_address)) == 0;
}
ssize_t IPAddress::printTo(Print& p) const
size_t IPAddress::printTo(Print& p) const
{
ssize_t n = 0, t;
size_t n = 0;
for (int i =0; i < 3; i++)
{
if ((t = p.print(_address[i], DEC)) > 0) n += t;
if ((t = p.print('.')) > 0) n+= t;
n += p.print(_address[i], DEC);
n += p.print('.');
}
if ((t = p.print(_address[3], DEC)) > 0) n += t;
n += p.print(_address[3], DEC);
return n;
}