109 lines
4.0 KiB
C
109 lines
4.0 KiB
C
/**************************************************************************
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GTA PROJECT AT division
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Copyright, 1989, The Regents of the University of California.
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Los Alamos National Laboratory
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$Id$
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DESCRIPTION: Structures for parsing the state notation language.
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ENVIRONMENT: UNIX
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HISTORY:
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18nov91,ajk Replaced lstLib stuff with in-line links.
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***************************************************************************/
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/* Data for these blocks are generated by the parsing routines for each
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** state set. The tables are then used to generate the run-time C code
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** for the sequencer. This decouples the parsing implementation from
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** the run-time code implementation.
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*/
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struct expression /* Expression block */
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{
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struct expression *next; /* link to next expression */
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struct expression *last; /* link to last in list */
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struct expression *left; /* ptr to left expression */
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struct expression *right; /* ptr to right expression */
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int type; /* expression type (E_*) */
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char *value; /* operator or value string */
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int line_num; /* line number */
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char *src_file; /* effective source file */
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};
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typedef struct expression Expr;
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struct var /* Variable or function definition */
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{
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struct var *next; /* link to next item in list */
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char *name; /* variable name */
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char *value; /* initial value or NULL */
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int type; /* var type */
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int length; /* array lth (0 if not an array) */
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int ef_num; /* event flag bit number */
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struct db_chan *chan; /* ptr to db channel struct or NULL */
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};
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typedef struct var Var;
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struct db_chan /* DB channel info */
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{
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struct db_chan *next; /* link to next item in list */
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char *db_name; /* database name */
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int index; /* channel array index */
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Var *var; /* ptr to variable definition */
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Var *ef_var; /* ptr to event flag variable for sync */
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int count; /* count for db access */
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int mon_flag; /* TRUE if channel is "monitored" */
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float delta; /* monitor dead-band */
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float timeout; /* monitor timeout */
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};
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typedef struct db_chan Chan;
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Expr *expression(), *link_expr();
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Var *findVar();
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Chan *findChan();
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/* Linked list allocation definitions */
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#define allocExpr() (Expr *)malloc(sizeof(Expr));
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#define allocVar() (Var *)malloc(sizeof(Var));
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#define allocChan() (Chan *)malloc(sizeof(Chan));
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/* Variable types */
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#define V_NONE 0 /* not defined */
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#define V_CHAR 1 /* char */
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#define V_SHORT 2 /* short */
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#define V_INT 3 /* int (but converted to long) */
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#define V_LONG 4 /* long */
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#define V_FLOAT 5 /* float */
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#define V_DOUBLE 6 /* double */
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#define V_STRING 7 /* strings (array of char) */
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#define V_EVFLAG 8 /* event flag */
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#define V_FUNC 9 /* function (not a variable) */
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#define V_UCHAR 11 /* unsigned char */
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#define V_USHORT 12 /* unsigned short */
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#define V_UINT 13 /* unsigned int (converted to unsigned long) */
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#define V_ULONG 14 /* unsigned long */
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/* Expression types */
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#define E_EMPTY 0 /* empty expression */
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#define E_CONST 1 /* numeric constant */
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#define E_VAR 2 /* variable */
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#define E_FUNC 3 /* function */
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#define E_STRING 4 /* ptr to string consatant */
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#define E_UNOP 5 /* unary operator: OP expr (-, +, or !) */
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#define E_BINOP 6 /* binary operator: expr OP expr */
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#define E_ASGNOP 7 /* assign operatro: (=, +=, *=, etc.) */
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#define E_PAREN 8 /* parenthesis around an expression */
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#define E_SUBSCR 9 /* subscript */
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#define E_TEXT 10 /* C code or other text to be inserted */
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#define E_STMT 11 /* simple statement */
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#define E_CMPND 12 /* begin compound statement: {...} */
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#define E_IF 13 /* if statement */
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#define E_ELSE 14 /* if statement */
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#define E_WHILE 15 /* while statement */
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#define E_SS 16 /* state set statement */
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#define E_STATE 17 /* state statement */
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#define E_WHEN 18 /* when statement */
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#define E_FOR 19 /* for statement */
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#define E_X 20 /* eXpansion (e.g. for(;;) */
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#define E_PRE 21 /* ++expr or --expr */
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#define E_POST 22 /* expr++ or expr-- */
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#define E_BREAK 23 /* break stmt */
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#define E_COMMA 24 /* expr , expr */
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