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- *** Listing 1 ***
-
- /*
- * hn.h - interface definition for the HNL
- *
- * Copyright(c) 1988 by Hobart Corporation.
- * Used with permission.
- */
-
- /*
- * port-level declarations
- */
- enum hn_bps {HN_1200_BPS, HN_2400_BPS, HN_4800_BPS, HN_9600_BPS};
- typedef unsigned hn_bps;
-
- enum hn_parity {HN_P_NONE, HN_P_ODD, HN_P_EVEN};
- typedef unsigned hn_parity;
-
- #include <hn_port.h>
- typedef struct hn_port hn_port;
-
- #define hn_perror(p) (p->errno)
-
- hn_port *hn_popen(char *dev, hn_bps bps, hn_parity par,
- unsigned data_bits, unsigned stop_bits);
- int hn_pclose(hn_port *p);
- int hn_pgetc(hn_port *p);
- int hn_pputc(int c, hn_port *p);
- int hn_pflush(hn_port *p);
- int hn_penable(hn_port *p);
- int hn_pdisable(hn_port *p);
-
- /*
- * stream-level declarations
- */
- enum hn_model {HN_1860, HN_1865, HN_1870, ..., HN_SP1500};
- typedef unsigned hn_model;
-
- struct hn_stream
- {
- unsigned si; /* scale id */
- unsigned fc; /* function code */
- hn_port *port; /* attached port */
- char blk_buf[2048]; /* packet buffer */
- int errno; /* error code */
- .
- .
- };
- typedef struct hn_stream hn_stream;
-
- #define hn_serror(s) (s->errno)
-
- hn_stream *hn_sopen
- (hn_port *p, unsigned si, hn_model m, unsigned fc);
- int hn_sclose(hn_stream *s);
- int hn_sgetc(hn_stream *s);
- int hn_sputc(int c, hn_stream *s);
-
-