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- /* The NexxStr structure is used to maintain the internal strings in REXX.
- * It includes the buffer area for the string and associated attributes.
- * This is actually a variable-length structure; it is allocated for a
- * specific length string, and the length is never modified thereafter
- * (since it's used for recycling).
- */
-
- struct NexxStr {
- LONG ns_Ivalue; /* integer value */
- UWORD ns_Length; /* length in bytes (excl null) */
- UBYTE ns_Flags; /* attribute flags */
- UBYTE ns_Hash; /* hash code */
- BYTE ns_Buff[8]; /* buffer area for strings */
- }; /* size: 16 bytes (minimum) */
-
- #define NXADDLEN 9 /* offset plus null byte */
- #define IVALUE(nsPtr) (nsPtr->ns_Ivalue)
-
- /* String attribute flag bit definitions */
- #define NSB_KEEP 0 /* permanent string? */
- #define NSB_STRING 1 /* string form valid? */
- #define NSB_NOTNUM 2 /* non-numeric? */
- #define NSB_NUMBER 3 /* a valid number? */
- #define NSB_BINARY 4 /* integer value saved? */
- #define NSB_FLOAT 5 /* floating point format? */
- #define NSB_EXT 6 /* an external string? */
- #define NSB_SOURCE 7 /* part of the program source? */
-
- /* The flag form of the string attributes */
- #define NSF_KEEP (1 << NSB_KEEP )
- #define NSF_STRING (1 << NSB_STRING)
- #define NSF_NOTNUM (1 << NSB_NOTNUM)
- #define NSF_NUMBER (1 << NSB_NUMBER)
- #define NSF_BINARY (1 << NSB_BINARY)
- #define NSF_FLOAT (1 << NSB_FLOAT )
- #define NSF_EXT (1 << NSB_EXT )
- #define NSF_SOURCE (1 << NSB_SOURCE)
-
- /* Combinations of flags */
- #define NSF_INTNUM (NSF_NUMBER | NSF_BINARY | NSF_STRING)
- #define NSF_DPNUM (NSF_NUMBER | NSF_FLOAT)
- #define NSF_ALPHA (NSF_NOTNUM | NSF_STRING)
- #define NSF_OWNED (NSF_SOURCE | NSF_EXT | NSF_KEEP)
- #define KEEPSTR (NSF_STRING | NSF_SOURCE | NSF_NOTNUM)
- #define KEEPNUM (NSF_STRING | NSF_SOURCE | NSF_NUMBER | NSF_BINARY)
-
- /* The RexxArg structure is identical to the NexxStr structure, but
- * is allocated from system memory rather than from internal storage.
- * This structure is used for passing arguments to external programs.
- * It is usually passed as an "argstring", a pointer to the string buffer.
- */
-
- struct RexxArg {
- LONG ra_Size; /* total allocated length */
- UWORD ra_Length; /* length of string */
- UBYTE ra_Flags; /* attribute flags */
- UBYTE ra_Hash; /* hash code */
- BYTE ra_Buff[8]; /* buffer area */
- }; /* size: 16 bytes (minimum) */
-
- /* The RexxMsg structure is used for all communications with REXX
- * programs. It is an EXEC message with a parameter block appended.
- */
-
- struct RexxMsg {
- struct Message rm_Node; /* EXEC message structure */
- APTR rm_TaskBlock; /* global structure (private) */
- APTR rm_LibBase; /* library base (private) */
- LONG rm_Action; /* command (action) code */
- LONG rm_Result1; /* primary result (return code) */
- LONG rm_Result2; /* secondary result */
- STRPTR rm_Args[16]; /* argument block (ARG0-ARG15) */
-
- struct MsgPort *rm_PassPort; /* forwarding port */
- STRPTR rm_CommAddr; /* host address (port name) */
- STRPTR rm_FileExt; /* file extension */
- LONG rm_Stdin; /* input stream (filehandle) */
- LONG rm_Stdout; /* output stream (filehandle) */
- LONG rm_avail; /* future expansion */
- }; /* size: 128 bytes */
-
- /* Field definitions */
- #define ARG0(rmp) (rmp->rm_Args[0]) /* start of argblock */
- #define ARG1(rmp) (rmp->rm_Args[1]) /* first argument */
- #define ARG2(rmp) (rmp->rm_Args[2]) /* second argument */
-
- #define MAXRMARG 15 /* maximum arguments */
-
- /* Command (action) codes for message packets */
- #define RXCOMM 0x01000000 /* a command-level invocation */
- #define RXFUNC 0x02000000 /* a function call */
- #define RXCLOSE 0x03000000 /* close the REXX server */
- #define RXQUERY 0x04000000 /* query for information */
- #define RXADDFH 0x07000000 /* add a function host */
- #define RXADDLIB 0x08000000 /* add a function library */
- #define RXREMLIB 0x09000000 /* remove a function library */
- #define RXADDCON 0x0A000000 /* add/update a ClipList string */
- #define RXREMCON 0x0B000000 /* remove a ClipList string */
- #define RXTCOPN 0x0C000000 /* open the trace console */
- #define RXTCCLS 0x0D000000 /* close the trace console */
-
- /* Command modifier flag bits */
- #define RXFB_NOIO 16 /* suppress I/O inheritance? */
- #define RXFB_RESULT 17 /* result string expected? */
- #define RXFB_STRING 18 /* program is a "string file"? */
- #define RXFB_TOKEN 19 /* tokenize the command line? */
- #define RXFB_NONRET 20 /* a "no-return" message? */
-
- /* The flag form of the command modifiers */
- #define RXFF_NOIO (1L << RXFB_NOIO )
- #define RXFF_RESULT (1L << RXFB_RESULT)
- #define RXFF_STRING (1L << RXFB_STRING)
- #define RXFF_TOKEN (1L << RXFB_TOKEN )
- #define RXFF_NONRET (1L << RXFB_NONRET)
-
- #define RXCODEMASK 0xFF000000
- #define RXARGMASK 0x0000000F
-
- /* The RexxRsrc structure is used to manage global resources. Each node
- * has a name string created as a RexxArg structure, and the total size
- * of the node is saved in the "rr_Size" field. The REXX systems library
- * provides functions to allocate and release resource nodes. If special
- * deletion operations are required, an offset and base can be provided in
- * "rr_Func" and "rr_Base", respectively. This "autodelete" function will
- * be called with the base in register A6 and the node in A0.
- */
-
- struct RexxRsrc {
- struct Node rr_Node;
- WORD rr_Func; /* "auto-delete" offset */
- APTR rr_Base; /* "auto-delete" base */
- LONG rr_Size; /* total size of node */
- LONG rr_Arg1; /* available ... */
- LONG rr_Arg2; /* available ... */
- }; /* size: 32 bytes */
-
- /* Resource node types */
- #define RRT_ANY 0 /* any node type ... */
- #define RRT_LIB 1 /* a function library */
- #define RRT_PORT 2 /* a public port */
- #define RRT_FILE 3 /* a file IoBuff */
- #define RRT_HOST 4 /* a function host */
- #define RRT_CLIP 5 /* a Clip List node */
-
- /* The RexxTask structure holds the fields used by REXX to communicate with
- * external processes, including the client task. It includes the global
- * data structure (and the base environment). The structure is passed to
- * the newly-created task in its "wake-up" message.
- */
-
- #define GLOBALSZ 200 /* total size of GlobalData */
-
- struct RexxTask {
- BYTE rt_Global[GLOBALSZ]; /* global data structure */
- struct MsgPort rt_MsgPort; /* global message port */
- UBYTE rt_Flags; /* task flag bits */
- BYTE rt_SigBit; /* signal bit */
-
- APTR rt_ClientID; /* the client's task ID */
- APTR rt_MsgPkt; /* the packet being processed */
- APTR rt_TaskID; /* our task ID */
- APTR rt_RexxPort; /* the REXX public port */
-
- APTR rt_ErrTrap; /* Error trap address */
- APTR rt_StackPtr; /* stack pointer for traps */
-
- struct List rt_Header1; /* Environment list */
- struct List rt_Header2; /* Memory freelist */
- struct List rt_Header3; /* Memory allocation list */
- struct List rt_Header4; /* Files list */
- struct List rt_Header5; /* Message Ports List */
- };
-
- /* Definitions for RexxTask flag bits */
- #define RTFB_TRACE 0 /* external trace flag */
- #define RTFB_HALT 1 /* external halt flag */
- #define RTFB_SUSP 2 /* suspend task? */
- #define RTFB_TCUSE 3 /* trace console in use? */
- #define RTFB_WAIT 6 /* waiting for reply? */
- #define RTFB_CLOSE 7 /* task completed? */
-
- /* Definitions for memory allocation constants */
- #define MEMQUANT 16L /* quantum of memory space */
- #define MEMMASK 0xFFFFFFF0 /* mask for rounding the size */
-
- #define MEMQUICK (1L << 0 ) /* EXEC flags: MEMF_PUBLIC */
- #define MEMCLEAR (1L << 16) /* EXEC flags: MEMF_CLEAR */
-
- /* The SrcNode is a temporary structure used to hold values destined for
- * a segment array. It is also used to maintain the memory freelist.
- */
-
- struct SrcNode {
- struct SrcNode *sn_Succ; /* next node */
- struct SrcNode *sn_Pred; /* previous node */
- APTR sn_Ptr; /* pointer value */
- LONG sn_Size; /* size of object */
- }; /* size: 16 bytes */
-
- /* Some macro definitions */
-
- #define RXSNAME "rexxsyslib.library"
- #define RXSID "rexxsyslib 1.06 (07 MAR 88)\n"
- #define RXSDIR "REXX"
- #define RXSTNAME "ARexx"
-
- /* The REXX systems library structure. This should be considered as */
- /* semi-private and read-only, except for documented exceptions. */
-
- struct RxsLib {
- struct Library rl_Node; /* EXEC library node */
- UBYTE rl_Flags; /* global flags */
- UBYTE rl_pad;
- APTR rl_SysBase; /* EXEC library base */
- APTR rl_DOSBase; /* DOS library base */
- APTR rl_IeeeDPBase; /* IEEE DP math library base */
- LONG rl_SegList; /* library seglist */
- LONG rl_NIL; /* global NIL: filehandle */
- LONG rl_Chunk; /* allocation quantum */
- LONG rl_MaxNest; /* maximum expression nesting */
- struct NexxStr *rl_NULL; /* static string: NULL */
- struct NexxStr *rl_FALSE; /* static string: FALSE */
- struct NexxStr *rl_TRUE; /* static string: TRUE */
- struct NexxStr *rl_REXX; /* static string: REXX */
- struct NexxStr *rl_COMMAND; /* static string: COMMAND */
- struct NexxStr *rl_STDIN; /* static string: STDIN */
- struct NexxStr *rl_STDOUT; /* static string: STDOUT */
- struct NexxStr *rl_STDERR; /* static string: STDERR */
- STRPTR rl_Version; /* version/configuration string */
-
- STRPTR rl_TaskName; /* name string for tasks */
- LONG rl_TaskPri; /* starting priority */
- LONG rl_TaskSeg; /* startup seglist */
- LONG rl_StackSize; /* stack size */
- STRPTR rl_RexxDir; /* REXX directory */
- STRPTR rl_CTABLE; /* character attribute table */
- struct NexxStr *rl_Notice; /* copyright notice */
-
- struct MsgPort rl_RexxPort; /* REXX public port */
- UWORD rl_ReadLock; /* lock count */
- LONG rl_TraceFH; /* global trace console */
- struct List rl_TaskList; /* REXX task list */
- WORD rl_NumTask; /* task count */
- struct List rl_LibList; /* Library List header */
- WORD rl_NumLib; /* library count */
- struct List rl_ClipList; /* ClipList header */
- WORD rl_NumClip; /* clip node count */
- struct List rl_MsgList; /* pending messages */
- WORD rl_NumMsg; /* pending count */
- struct List rl_PgmList; /* cached programs */
- WORD rl_NumPgm; /* program count */
-
- UWORD rl_TraceCnt; /* usage count for trace console */
- WORD rl_avail;
- };
-
- /* Global flag bit definitions for RexxMaster */
- #define RLFB_TRACE RTFB_TRACE /* interactive tracing? */
- #define RLFB_HALT RTFB_HALT /* halt execution? */
- #define RLFB_SUSP RTFB_SUSP /* suspend execution? */
- #define RLFB_STOP 6 /* deny further invocations */
- #define RLFB_CLOSE 7 /* close the master */
-
- #define RLFMASK (1<<RLFB_TRACE) | (1<<RLFB_HALT) | (1<<RLFB_SUSP)
-
- /* Initialization constants */
- #define RXSVERS 34 /* main version */
- #define RXSREV 7 /* revision */
- #define RXSALLOC 0x800000 /* maximum allocation */
- #define RXSCHUNK 1024 /* allocation quantum */
- #define RXSNEST 32 /* expression nesting limit */
- #define RXSTPRI 0 /* task priority */
- #define RXSSTACK 4096 /* stack size */
- #define RXSLISTH 5 /* number of list headers */
-
- /* Character attribute flag bits used in REXX. */
- #define CTB_SPACE 0 /* white space characters */
- #define CTB_DIGIT 1 /* decimal digits 0-9 */
- #define CTB_ALPHA 2 /* alphabetic characters */
- #define CTB_REXXSYM 3 /* REXX symbol characters */
- #define CTB_REXXOPR 4 /* REXX operator characters */
- #define CTB_REXXSPC 5 /* REXX special symbols */
- #define CTB_UPPER 6 /* UPPERCASE alphabetic */
- #define CTB_LOWER 7 /* lowercase alphabetic */
-
- /* Attribute flags */
- #define CTF_SPACE (1 << CTB_SPACE)
- #define CTF_DIGIT (1 << CTB_DIGIT)
- #define CTF_ALPHA (1 << CTB_ALPHA)
- #define CTF_REXXSYM (1 << CTB_REXXSYM)
- #define CTF_REXXOPR (1 << CTB_REXXOPR)
- #define CTF_REXXSPC (1 << CTB_REXXSPC)
- #define CTF_UPPER (1 << CTB_UPPER)
- #define CTF_LOWER (1 << CTB_LOWER)
-
- /*
- * This is the list of functions we can access. (Cheap forward
- * declarations, too.)
- */
-
- /*
- * Maximum messages that can be pending, and the return codes
- * for two bad situations.
- */
- #define MAXRXOUTSTANDING (300)
- #define RXERRORIMGONE (100)
- #define RXERRORNOCMD (30)
- /*
- * This is the association list you build up (statically or
- * dynamically) that should be terminated with an entry with
- * NULL for the name . . .
- */
- struct rexxCommandList {
- char *name ;
- char *(*userdata)() ;
- };
-