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/* $Id: istream.h,v 1.2 2006/06/12 22:06:24 mjt Exp $
* simple read (input) stream (header file)
*/
#ifndef ISTREAM_BUFSIZE
#define ISTREAM_BUFSIZE 65536 /* max line size is ISTREAM_BUFSIZE/2 */
#define ISTREAM_PAD 4 /* extra safety bytes */
struct istream {
unsigned char *endp; /* end-of-data pointer (data read so far) in buf */
unsigned char *readp; /* current read pointer within buf */
unsigned char pad1[ISTREAM_PAD];
unsigned char buf[ISTREAM_BUFSIZE]; /* the data pointer */
unsigned char pad2[ISTREAM_PAD];
void *cookie; /* cookie for readfn routine */
int (*readfn)(struct istream *sp, unsigned char *buf, int size, int szhint);
void (*freefn)(struct istream *sp);
};
#define istream_buf(sp) ((sp)->buf+ISTREAM_EXTRA)
int istream_fillbuf(struct istream *sp);
int istream_ensurebytes(struct istream *sp, int nbytes);
int istream_getline(struct istream *sp, char **linep, char delim);
void istream_init(struct istream *sp,
int (*readfn)(struct istream*,unsigned char*,int,int),
void (*freefn)(struct istream*), void *cookie);
void istream_init_fd(struct istream *sp, int fd);
void istream_destroy(struct istream *sp);
/* checks whenever the given stream is in gzip format */
int istream_compressed(struct istream *sp);
/* setup istream to automatically uncompress input if compressed */
int istream_uncompress_setup(struct istream *sp);
#endif /* include guard */
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