47 lines
785 B
C++
47 lines
785 B
C++
// 21 may 2018
|
|
#include <vector>
|
|
|
|
class Error {
|
|
public:
|
|
virtual ~Error(void);
|
|
|
|
virtual const char *String(void) const = 0;
|
|
};
|
|
|
|
extern Error *NewEOF(void);
|
|
extern Error *NewErrShortWrite(void);
|
|
extern bool IsEOF(Error *e);
|
|
|
|
class ReadCloser {
|
|
public:
|
|
virtual ~ReadCloser(void);
|
|
|
|
virtual Error *Read(void *buf, size_t n, size_t *actual) = 0;
|
|
};
|
|
|
|
class WriteCloser {
|
|
public:
|
|
virtual ~WriteCloser(void);
|
|
|
|
virtual Error *Write(void *buf, size_t n) = 0;
|
|
};
|
|
|
|
extern Error *OpenRead(const char *filename, ReadCloser **r);
|
|
|
|
class Scanner {
|
|
ReadCloser *r;
|
|
char *buf;
|
|
const char *p;
|
|
size_t n;
|
|
std::vector<char> *line;
|
|
Error *err;
|
|
public:
|
|
Scanner(ReadCloser *r);
|
|
~Scanner(void);
|
|
|
|
bool Scan(void);
|
|
const char *Bytes(void) const;
|
|
size_t Len(void) const;
|
|
Error *Err(void) const;
|
|
};
|