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write(), print(), and println() now return number of bytes written.

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The type is long, and negative values indicate errors.  Needs more testing.
http://code.google.com/p/arduino/issues/detail?id=551
This commit is contained in:
David A. Mellis
2011-08-23 19:12:03 -04:00
parent b788ad593f
commit 8059abe581
24 changed files with 290 additions and 174 deletions
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61
libraries/ArduinoTestSuite/examples/ATS_Write_Print/ATS_Write_Print.ino Normal file
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#include <ArduinoTestSuite.h>
void Test_Equal(long actual, long expected)
{
char buf[100];
boolean b = expected == actual;
ATS_PrintTestStatus("", b);
if (!b) {
Serial.print("expected '");
Serial.print(expected);
Serial.print("', actual '");
Serial.print(actual);
Serial.println("'");
}
}
void setup()
{
byte buf[5] = { 65, 66, 67, 0, 69 };
ATS_begin("Arduino", "Write & Print Return Values Test");
Test_Equal(Serial.write('a'), 1);
Test_Equal(Serial.write(byte(0)), 1);
Test_Equal(Serial.write("abc"), 3);
Test_Equal(Serial.write(""), 0);
Test_Equal(Serial.write(buf, 5), 5);
Test_Equal(Serial.print(0), 1);
Test_Equal(Serial.print(""), 0);
Test_Equal(Serial.print("abc"), 3);
Test_Equal(Serial.print(0), 1);
Test_Equal(Serial.print(1), 1);
Test_Equal(Serial.print(11), 2);
Test_Equal(Serial.print(12345), 5);
Test_Equal(Serial.print(-1), 2);
Test_Equal(Serial.print(-123), 4);
Test_Equal(Serial.println(), 2);
Test_Equal(Serial.println(""), 2);
Test_Equal(Serial.println("abc"), 5);
Test_Equal(Serial.println(0), 3);
Test_Equal(Serial.println(1), 3);
Test_Equal(Serial.println(11), 4);
Test_Equal(Serial.println(12345), 7);
Test_Equal(Serial.println(-1), 4);
Test_Equal(Serial.println(-123), 6);
ATS_end();
}
void loop() {}