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50 lines
1.5 KiB
50 lines
1.5 KiB
15 years ago
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/* $Id: qio.h 3653 2000-07-29 02:57:50Z rra $
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**
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** Quick I/O package.
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**
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** The interface to the Quick I/O package, optimized for reading through
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** files line by line. This package uses internal buffering like stdio,
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** but is even more aggressive about its buffering.
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*/
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#ifndef INN_QIO_H
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#define INN_QIO_H 1
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#include <inn/defines.h>
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BEGIN_DECLS
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/*
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** State for a quick open file, equivalent to FILE for stdio. All callers
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** should treat this structure as opaque and instead use the functions and
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** macros defined below.
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*/
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enum QIOflag { QIO_ok, QIO_error, QIO_long };
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typedef struct {
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int _fd;
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size_t _length; /* Length of the current string. */
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size_t _size; /* Size of the internal buffer. */
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char * _buffer;
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char * _start; /* Start of the unread data. */
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char * _end; /* End of the available data. */
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off_t _count; /* Number of bytes read so far. */
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enum QIOflag _flag;
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} QIOSTATE;
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#define QIOerror(qp) ((qp)->_flag != QIO_ok)
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#define QIOtoolong(qp) ((qp)->_flag == QIO_long)
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#define QIOfileno(qp) ((qp)->_fd)
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#define QIOlength(qp) ((qp)->_length)
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#define QIOtell(qp) ((qp)->_count - ((qp)->_end - (qp)->_start))
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extern QIOSTATE * QIOopen(const char *name);
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extern QIOSTATE * QIOfdopen(int fd);
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extern char * QIOread(QIOSTATE *qp);
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extern void QIOclose(QIOSTATE *qp);
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extern int QIOrewind(QIOSTATE *qp);
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END_DECLS
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#endif /* !INN_QIO_H */
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