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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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8
libraries/SD/utility/SdFat.h
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@ -141,7 +141,7 @@ class SdFile : public Print {
* Set writeError to false before calling print() and/or write() and check
* for true after calls to print() and/or write().
*/
bool writeError;
//bool writeError;
/**
* Cancel unbuffered reads for this file.
* See setUnbufferedRead()
@ -283,9 +283,9 @@ class SdFile : public Print {
}
/** \return SdVolume that contains this file. */
SdVolume* volume(void) const {return vol_;}
ssize_t write(uint8_t b);
ssize_t write(const void* buf, uint16_t nbyte);
ssize_t write(const char* str);
size_t write(uint8_t b);
size_t write(const void* buf, uint16_t nbyte);
size_t write(const char* str);
void write_P(PGM_P str);
void writeln_P(PGM_P str);
//------------------------------------------------------------------------------