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first pass of compatability functions

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Jorj Bauer 2020-06-28 08:29:51 -04:00
parent 845a0f6175
commit 7cd20333d6
1 changed files with 35 additions and 0 deletions
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35
filemanager.h
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@ -11,6 +11,13 @@
#define FMMAGIC 'F'
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifndef SEEK_CUR
#define SEEK_CUR 1
#endif
class FileManager {
public:
virtual ~FileManager() {};
@ -121,6 +128,34 @@ class FileManager {
virtual bool setSeekPosition(int8_t fd, uint32_t pos) = 0;
virtual void seekToEnd(int8_t fd) = 0;
int write(int8_t fd, const void *buf, int nbyte) {
uint8_t *p = (uint8_t *)buf;
for (int i=0; i<nbyte; i++) {
if (!writeByte(fd, p[i]))
return -1;
}
return nbyte;
};
int read(int8_t fd, void *buf, int nbyte) {
uint8_t *p = (uint8_t *)buf;
for (int i=0; i<nbyte; i++) {
p[i] = readByte(fd); // FIXME: no error handling
}
return nbyte;
};
int seek(int8_t fd, int offset, int whence) {
if (whence == SEEK_CUR && offset == 0) {
return fileSeekPositions[fd];
}
if (whence == SEEK_SET) {
if (!setSeekPosition(fd, offset))
return -1;
return offset;
}
// Other cases not supported yet
return -1;
};
protected:
unsigned long fileSeekPositions[MAXFILES];
char cachedNames[MAXFILES][MAXPATH];