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Redoing peek() implementation (SD file class). 

Now simply seeking backwards by a character in peek() rather than trying to keep track of the extra character read.
This commit is contained in:
David A. Mellis 2010-12-22 16:47:50 -06:00
parent a7a8f3fa10
commit 575bb1dafb
4 changed files with 7 additions and 22 deletions
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6
libraries/ArduinoTestSuite/examples/ATS_SD_Files/ATS_SD_Files.pde
View File

@ -13,7 +13,7 @@ void setup()
if (!b) goto done;
ATS_PrintTestStatus("!SD.exists()", !SD.exists("asdf.txt"));
ATS_PrintTestStatus("SD.open()", f = SD.open("asdf.txt", FILE_TRUNCATE)); f.close();
ATS_PrintTestStatus("SD.open()", f = SD.open("asdf.txt", FILE_WRITE)); f.close();
ATS_PrintTestStatus("SD.exists()", SD.exists("asdf.txt"));
ATS_PrintTestStatus("SD.exists()", SD.exists("/asdf.txt"));
ATS_PrintTestStatus("SD.remove()", SD.remove("asdf.txt"));
@ -48,13 +48,13 @@ void setup()
ATS_PrintTestStatus("!SD.exists()", !SD.exists("x/y"));
ATS_PrintTestStatus("!SD.exists()", !SD.exists("x/y/z"));
ATS_PrintTestStatus("!SD.open()", !(f = SD.open("asdf/asdf.txt", FILE_TRUNCATE))); f.close();
ATS_PrintTestStatus("!SD.open()", !(f = SD.open("asdf/asdf.txt", FILE_WRITE))); f.close();
ATS_PrintTestStatus("!SD.exists()", !SD.exists("asdf"));
ATS_PrintTestStatus("!SD.exists()", !SD.exists("asdf.txt"));
ATS_PrintTestStatus("!SD.exists()", !SD.exists("asdf/asdf.txt"));
ATS_PrintTestStatus("SD.mkdir()", SD.mkdir("asdf"));
ATS_PrintTestStatus("SD.exists()", SD.exists("asdf"));
ATS_PrintTestStatus("SD.open()", f = SD.open("asdf/asdf.txt", FILE_TRUNCATE)); f.close();
ATS_PrintTestStatus("SD.open()", f = SD.open("asdf/asdf.txt", FILE_WRITE)); f.close();
ATS_PrintTestStatus("SD.exists()", SD.exists("asdf/asdf.txt"));
ATS_PrintTestStatus("!SD.rmdir()", !SD.rmdir("asdf"));
ATS_PrintTestStatus("SD.exists()", SD.exists("asdf"));

20
libraries/SD/File.cpp
View File

@ -15,39 +15,29 @@
#include <SD.h>
void File::write(uint8_t val) {
SD.c = -1;
SD.file.write(val);
}
void File::write(const char *str) {
SD.c = -1;
SD.file.write(str);
}
void File::write(const uint8_t *buf, size_t size) {
SD.c = -1;
SD.file.write(buf, size);
}
int File::peek() {
if (SD.c != -1) return SD.c;
SD.c = SD.file.read();
return SD.c;
char c = SD.file.read();
if (c != -1) SD.file.seekCur(-1);
return c;
}
int File::read() {
if (SD.c != -1) {
int tmp = SD.c;
SD.c = -1;
return tmp;
}
return SD.file.read();
}
int File::available() {
if (SD.c != -1) return 1;
SD.c = SD.file.read();
return SD.c != -1;
return size() - position();
}
void File::flush() {
@ -55,12 +45,10 @@ void File::flush() {
}
boolean File::seek(uint32_t pos) {
SD.c = -1;
return SD.file.seekSet(pos);
}
uint32_t File::position() {
if (SD.c != -1) return SD.file.curPosition() - 1;
return SD.file.curPosition();
}

1
libraries/SD/SD.cpp
View File

@ -300,7 +300,6 @@ boolean callback_openPath(SdFile& parentDir, char *filePathComponent,
if (p_SD->fileOpenMode == FILE_WRITE) {
p_SD->file.seekSet(p_SD->file.fileSize());
}
p_SD->c = -1;
// TODO: Return file open result?
return false;
}

2
libraries/SD/SD.h
View File

@ -79,8 +79,6 @@ private:
// It shouldn't be set directly--it is set via the parameters to `open`.
int fileOpenMode;
int c;
friend class File;
friend boolean callback_openPath(SdFile&, char *, boolean, void *);
};