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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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6
libraries/SD/utility/SdFat.h
View File

@@ -283,9 +283,9 @@ class SdFile : public Print {
}
/** \return SdVolume that contains this file. */
SdVolume* volume(void) const {return vol_;}
void write(uint8_t b);
int16_t write(const void* buf, uint16_t nbyte);
void write(const char* str);
long write(uint8_t b);
long write(const void* buf, uint16_t nbyte);
long write(const char* str);
void write_P(PGM_P str);
void writeln_P(PGM_P str);
//------------------------------------------------------------------------------

10
libraries/SD/utility/SdFile.cpp
View File

@@ -1121,7 +1121,7 @@ uint8_t SdFile::truncate(uint32_t length) {
* for a read-only file, device is full, a corrupt file system or an I/O error.
*
*/
int16_t SdFile::write(const void* buf, uint16_t nbyte) {
long SdFile::write(const void* buf, uint16_t nbyte) {
// convert void* to uint8_t* - must be before goto statements
const uint8_t* src = reinterpret_cast<const uint8_t*>(buf);
@@ -1219,8 +1219,8 @@ int16_t SdFile::write(const void* buf, uint16_t nbyte) {
*
* Use SdFile::writeError to check for errors.
*/
void SdFile::write(uint8_t b) {
write(&b, 1);
long SdFile::write(uint8_t b) {
return write(&b, 1);
}
//------------------------------------------------------------------------------
/**
@@ -1228,8 +1228,8 @@ void SdFile::write(uint8_t b) {
*
* Use SdFile::writeError to check for errors.
*/
void SdFile::write(const char* str) {
write(str, strlen(str));
long SdFile::write(const char* str) {
return write(str, strlen(str));
}
//------------------------------------------------------------------------------
/**