mirror of
https://github.com/MariaDB/server.git
synced 2025-01-22 23:04:20 +01:00
42 lines
968 B
C
42 lines
968 B
C
#ifndef RBUF_H
|
|
#define RBUF_H
|
|
|
|
#include <assert.h>
|
|
|
|
struct rbuf {
|
|
unsigned char *buf;
|
|
unsigned int size;
|
|
unsigned int ndone;
|
|
};
|
|
|
|
static unsigned int rbuf_char (struct rbuf *r) {
|
|
assert(r->ndone<r->size);
|
|
return r->buf[r->ndone++];
|
|
}
|
|
|
|
static unsigned int rbuf_int (struct rbuf *r) {
|
|
unsigned char c0 = rbuf_char(r);
|
|
unsigned char c1 = rbuf_char(r);
|
|
unsigned char c2 = rbuf_char(r);
|
|
unsigned char c3 = rbuf_char(r);
|
|
return ((c0<<24)|
|
|
(c1<<16)|
|
|
(c2<<8)|
|
|
(c3<<0));
|
|
}
|
|
|
|
/* Return a pointer into the middle of the buffer. */
|
|
static void rbuf_bytes (struct rbuf *r, bytevec *bytes, unsigned int *n_bytes)
|
|
{
|
|
*n_bytes = rbuf_int(r);
|
|
*bytes = &r->buf[r->ndone];
|
|
r->ndone+=*n_bytes;
|
|
assert(r->ndone<=r->size);
|
|
}
|
|
|
|
static diskoff rbuf_diskoff (struct rbuf *r) {
|
|
unsigned i0 = rbuf_int(r);
|
|
unsigned i1 = rbuf_int(r);
|
|
return ((unsigned long long)(i0)<<32) | ((unsigned long long)(i1));
|
|
}
|
|
#endif
|