readblock
static int readblock(int);
while (readblock(fd_in))
while (readblock(fileno(stdin)) > 0) {
extern int readblock(int);
int readblock(int);
while (readblock(fd_in))
while ( readblock(fd_in) )
block = (char *)readblock(sector + i, 1);
if (!(fp = (uchar_t *)readblock(sectn, 2))) {
dxp = readblock(sector, 1); /* read one sector */
static void *readblock(int, int);
(readblock() != NULL ? *blockp : '\0'))
#define skiprefchar() if (*(++blockp + 1) == '\0') (void) readblock()
} while (*(blockp + 1) == '\0' && readblock() != NULL);
} while (*(cp + 1) == '\0' && (cp = readblock()) != NULL);
} while (*(cp + 1) == '\0' && (cp = readblock()) != NULL);
} while (*(cp + 1) == '\0' && (cp = readblock()) != NULL);
} while (*(cp + 1) == '\0' && (cp = readblock()) != NULL);
(void) readblock();
cp = readblock();
char *readblock(void);
(void) readblock(); /* read the first cross-ref block */
} while (*++cp == '\0' && (cp = readblock()) != NULL);
cp = readblock();
} while (*++cp == '\0' && (cp = readblock()) != NULL);
cp = readblock();