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- /* BDSCIO.H VERS:- 01.00 DATE:- 09/26/86 TIME:- 09:36:00 PM */
- /*
- Description:
-
- Standard header file.
-
- From Van Nuys Toolkit and the BDS-C distribution package.
-
- By J.A. Rupley, Tucson, Arizona
- Coded for BDS C compiler, version 1.50a
- */
- /*
- * The BDS C Standard I/O header file -- v1.50 12/29/82
- *
- * This file contains global definitions, for use in all C programs
- * in PLACE of (yechhh) CONSTANTS. Characteristics of your system such
- * buffered I/O allocations, storage allocator state, etc., should all
- * be configured just once within this file. Any program which needs
- * them should contain the preprocessor directive:
- *
- * #include <bdscio.h>
- *
- * near the beginning.
- */
-
-
- /*
- * General purpose Symbolic constants:
- */
-
- #define BASE 0 /* Base of CP/M system RAM (0 or 0x4200) */
- #define NULL 0
- #define EOF -1 /* Physical EOF returned by low level I/O functions */
- #define ERROR -1 /* General "on error" return value */
- #define OK 0 /* General purpose "no error" return value */
- #define JBUFSIZE 6 /* Length of setjump/longjump buffer */
- #define CPMEOF 0x1a /* CP/M End-of-text-file marker (sometimes!) */
- #define SECSIZ 128 /* Sector size for CP/M read/write calls */
- #define MAXLINE 150 /* Longest line of input expected from the console */
- #define TRUE 1 /* logical true constant */
- #define FALSE 0 /* logical false constant */
- #DEFINE THEN {
- #DEFINE LOOP {
- #DEFINE ENDIF }
- #DEFINE ENDLOOP }
- #DEFINE FUNCTION /**/
-
- #DEFINE STDIN 0
- #DEFINE STDOUT 1
- #DEFINE STDERR 4
- #DEFINE STDLST 2
- #DEFINE STDRDR 3
- #DEFINE STDPUN 3
-
- /* FOR USE WITH OPEN */
- #DEFINE READ 0
- #DEFINE WRITE 1
- #DEFINE READWRITE 2
-
- /*
- * The NSECTS symbol controls the compilation of the buffered
- * I/O routines within STDLIB2.C, allowing each user to set the
- * buffer size most convenient for his system, while keeping
- * the numbers totally invisible to the C source programs using
- * buffered I/O (via the BUFSIZ defined symbol.) For larger
- * NSECTS, the disk I/O is faster...but more ram is taken up.
- * To change the buffer size allocation, follow these steps:
- *
- * 1) Change NSECTS below
- * 2) Re-compile STDLIB1.C and STDLIB2.C
- * 3) Use CLIB to combine STDLIB1.CRL and STDLIB2.CRL to make
- * a new DEFF.CRL. This isn't as touch as it sounds.
- *
- * Make sure you declare all your I/O buffers with the a
- * statement such as:
- *
- * char buf_name[BUFSIZ];
- */
-
- #define NSECTS 8 /* Number of sectors to buffer up in ram */
-
- #define BUFSIZ (NSECTS * SECSIZ + 7) /* Don't touch this */
-
- struct _buf { /* Or this... */
- int _fd;
- int _nleft;
- char *_nextp;
- char _buff[NSECTS * SECSIZ];
- char _flags;
- };
-
- #define FILE struct _buf /* Poor man's "typedef" */
-
- #define _READ 1
- #define _WRITE 2
-
- struct _long {char _lc[2];};
- struct _float {char _ft[5];};
- #define LONG struct _long /* LONG typedef */
- #define FLOAT struct _float /* FLOAT typedef */
- #define REAL struct _float /* REAL typedef */
-
- /*
- * Storage allocation data, used by "alloc" and "free"
- */
-
- struct _header {
- struct _header *_ptr;
- unsigned _size;
- };
-
- struct _header _base; /* declare this external data to */
- struct _header *_allocp; /* be used by alloc() and free() */