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* expression library definitions
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#undef RS /* hp.pa <signal.h> grabs this!! */
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#if _BLD_expr && defined(__EXPORT__)
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#define extern __EXPORT__
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#if !_BLD_expr && defined(__IMPORT__)
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#define extern __IMPORT__
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#define EX_VERSION 20000101L
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#define EX_CHARSTRING (1<<0) /* '...' same as "..." */
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#define EX_CONSTANT (1<<1) /* compile to constant expr */
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#define EX_FATAL (1<<2) /* errors are fatal */
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#define EX_INTERACTIVE (1<<3) /* interactive input */
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#define EX_PURE (1<<4) /* no default symbols/keywords */
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#define EX_QUALIFY (1<<5) /* '.' refs qualified in id tab */
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#define EX_RETAIN (1<<6) /* retain expressions on redef */
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#define EX_SIZED (1<<7) /* strings are sized buffers */
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#define EX_STRICT (1<<8) /* don't override null label */
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#define EX_UNDECLARED (1<<9) /* allow undeclared identifiers */
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#define EX_CALL (-2) /* getval() function call elt */
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#define EX_SCALAR (-1) /* getval() scalar elt */
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#define EX_NAMELEN 32 /* default Exid_t.name length */
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#define EXID(n,l,i,t,f) {{0},(l),(i),(t),(f),0,{0},n}
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#define DELETE BREAK /* exexpr() delete `type' */
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#define INTEGRAL(t) ((t)>=CHAR&&(t)<=UNSIGNED)
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/* function type mechanism
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* types are encoded in TBITS
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* Thus, maximum # of parameters, including return type,
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* is sizeof(Exid_t.type)/TBITS. Also see T in exgram.h
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* arg 0 is the return value type
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#define F 01 /* FLOATING */
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#define I 02 /* INTEGER */
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#define S 03 /* STRING */
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#define TMASK ((1<<TBITS)-1)
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#define A(n,t) ((t)<<((n)*TBITS)) /* function arg n is type t */
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#define N(t) ((t)>>=TBITS) /* shift for next arg */
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#define exalloc(p,n) exnewof(p,0,char,n,0)
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#define exnewof(p,o,t,n,x) vmnewof((p)->vm,o,t,n,x)
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#define exfree(p,x) vmfree((p)->vm,x)
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#define exstrdup(p,s) vmstrdup((p)->vm,s)
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#if LONG_MAX > INT_MAX
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typedef int Exshort_t;
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typedef short Exshort_t;
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typedef EXSTYPE Extype_t;
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union Exdata_u; typedef union Exdata_u Exdata_t;
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struct Exdisc_s; typedef struct Exdisc_s Exdisc_t;
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struct Exnode_s; typedef struct Exnode_s Exnode_t;
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struct Expr_s; typedef struct Expr_s Expr_t;
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struct Exref_s; typedef struct Exref_s Exref_t;
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typedef int (*Exerror_f)(Expr_t*, Exdisc_t*, int, const char*, ...);
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typedef struct /* user defined member type */
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typedef struct Exid_s /* id symbol table info */
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Dtlink_t link; /* symbol table link */
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long lex; /* lex class */
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long index; /* user defined index */
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long type; /* symbol and arg types */
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long flags; /* user defined flags */
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Exnode_t* value; /* value */
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Exlocal_t local; /* user defined local stuff */
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char name[EX_NAMELEN];/* symbol name */
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struct Exref_s /* . reference list */
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Exref_t* next; /* next in list */
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Exid_t* symbol; /* reference id symbol */
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Exnode_t* index; /* optional reference index */
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typedef struct /* sized buffer */
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unsigned long size; /* buffer size */
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char* data; /* buffer data */
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Extype_t value; /* constant value */
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Exid_t* reference; /* conversion reference symbol */
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} constant; /* variable reference */
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Exnode_t* left; /* left operand */
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Exnode_t* right; /* right operand */
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} operand; /* operands */
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Exnode_t* statement; /* case label statement(s) */
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Exnode_t* next; /* next case item */
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Extype_t** constant; /* case label constant array */
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} select; /* case item */
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Exid_t* symbol; /* id symbol table entry */
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Exref_t* reference; /* . reference list */
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Exnode_t* index; /* array index expression */
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Exnode_t* dyna; /* dynamic expression */
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} variable; /* variable reference */
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#ifdef _EX_DATA_PRIVATE_
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struct Exnode_s /* expression tree node */
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Exshort_t type; /* value type */
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Exshort_t op; /* operator */
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Exshort_t binary; /* data.operand.{left,right} ok */
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Exshort_t pad_1; /* padding to help cc */
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Exlocal_t local; /* user defined local stuff */
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double (*floating)(char**); /* FLOATING return value */
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Sflong_t(*integer)(char**); /* INTEGER|UNSIGNED return value*/
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char* (*string)(char**); /* STRING return value */
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} compiled; /* compiled function pointer */
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Exdata_t data; /* node data */
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#ifdef _EX_NODE_PRIVATE_
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struct Exdisc_s /* discipline */
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unsigned long version; /* EX_VERSION */
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unsigned long flags; /* EX_* flags */
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Exid_t* symbols; /* static symbols */
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char** data; /* compiled function arg data */
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char* lib; /* pathfind() lib */
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char* type; /* pathfind() type */
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int (*castf)(Expr_t*, Exnode_t*, const char*, int, Exid_t*, int, Exdisc_t*);
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/* unknown cast function */
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int (*convertf)(Expr_t*, Exnode_t*, int, Exid_t*, int, Exdisc_t*);
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/* type conversion function */
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Exerror_f errorf; /* error function */
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Extype_t (*getf)(Expr_t*, Exnode_t*, Exid_t*, Exref_t*, void*, int, Exdisc_t*);
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/* get value function */
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Extype_t (*reff)(Expr_t*, Exnode_t*, Exid_t*, Exref_t*, char*, int, Exdisc_t*);
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/* reference value function */
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int (*setf)(Expr_t*, Exnode_t*, Exid_t*, Exref_t*, void*, int, Extype_t, Exdisc_t*);
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/* set value function */
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int (*matchf)(Expr_t*, Exnode_t*, const char*, Exnode_t*, const char*, void*, Exdisc_t*);
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struct Expr_s /* ex program state */
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const char* id; /* library id */
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Dt_t* symbols; /* symbol table */
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const char* more; /* more after %% (sp or != 0) */
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Sfio_t* file[10]; /* io streams */
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Vmalloc_t* vm; /* program store */
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#ifdef _EX_PROG_PRIVATE_
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struct Excc_s; typedef struct Excc_s Excc_t;
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struct Exccdisc_s; typedef struct Exccdisc_s Exccdisc_t;
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struct Exccdisc_s /* excc() discipline */
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Sfio_t* text; /* text output stream */
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char* id; /* symbol prefix */
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unsigned long flags; /* EXCC_* flags */
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int (*ccf)(Excc_t*, Exnode_t*, Exid_t*, Exref_t*, Exnode_t*, Exccdisc_t*);
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/* program generator function */
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struct Excc_s /* excc() state */
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Expr_t* expr; /* exopen() state */
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Exdisc_t* disc; /* exopen() discipline */
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#ifdef _EX_CC_PRIVATE_
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#if _BLD_expr && defined(__EXPORT__)
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#define extern __EXPORT__
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#if !_BLD_expr && defined(__IMPORT__)
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#define extern __IMPORT__
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extern Exid_t exbuiltin[];
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#if _BLD_expr && defined(__EXPORT__)
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#define extern __EXPORT__
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extern Exnode_t* excast(Expr_t*, Exnode_t*, int, Exnode_t*, int);
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extern int excc(Excc_t*, const char*, Exid_t*, int);
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extern int exccclose(Excc_t*);
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extern Excc_t* exccopen(Expr_t*, Exccdisc_t*);
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extern void exclose(Expr_t*, int);
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extern int excomp(Expr_t*, const char*, int, const char*, Sfio_t*);
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extern char* excontext(Expr_t*, char*, int);
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extern int exdump(Expr_t*, Exnode_t*, Sfio_t*);
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extern void exerror(const char*, ...);
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extern Extype_t exeval(Expr_t*, Exnode_t*, void*);
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extern Exnode_t* exexpr(Expr_t*, const char*, Exid_t*, int);
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extern void exfreenode(Expr_t*, Exnode_t*);
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extern Exnode_t* exnewnode(Expr_t*, int, int, int, Exnode_t*, Exnode_t*);
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extern Expr_t* exopen(Exdisc_t*);
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extern int expop(Expr_t*);
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extern int expush(Expr_t*, const char*, int, const char*, Sfio_t*);
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extern int exrewind(Expr_t*);
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extern void exstatement(Expr_t*);
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extern int extoken(Expr_t*);
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extern char* extype(int);
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extern Extype_t exzero(int);
added
removed
tools/expr/expr.h
