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