| 1 | #ifndef SUBEXPR_H |
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| 2 | #define SUBEXPR_H |
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| 3 | /**************************************** |
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| 4 | * Computer Algebra System SINGULAR * |
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| 5 | ****************************************/ |
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| 6 | /* $Id: subexpr.h,v 1.3 1997-04-09 12:20:15 Singular Exp $ */ |
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| 7 | /* |
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| 8 | * ABSTRACT: handling of leftv |
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| 9 | */ |
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| 10 | |
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| 11 | #include <string.h> |
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| 12 | #include "structs.h" |
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| 13 | |
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| 14 | struct _ssubexpr |
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| 15 | { |
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| 16 | struct _ssubexpr * next; |
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| 17 | int start; |
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| 18 | }; |
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| 19 | |
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| 20 | typedef struct _ssubexpr sSubexpr; |
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| 21 | typedef sSubexpr * Subexpr; |
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| 22 | |
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| 23 | extern const char sNoName[]; |
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| 24 | extern BOOLEAN siq; |
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| 25 | |
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| 26 | class sleftv; |
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| 27 | typedef sleftv * leftv; |
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| 28 | class sleftv |
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| 29 | { |
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| 30 | public: |
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| 31 | /* !! do not change the first 6 entries !! (see ipid.h: idrec) */ |
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| 32 | leftv next; |
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| 33 | char * name; |
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| 34 | void * data; |
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| 35 | BITSET flag; |
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| 36 | attr attribute; |
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| 37 | int rtyp; |
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| 38 | /* the type of the expression, describes the data field |
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| 39 | * (E) markes the type field in iparith |
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| 40 | * (S) markes the rtyp in sleftv |
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| 41 | * ANY_TYPE: data is int: real type or 0 (E) |
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| 42 | * DEF_CMD: all types, no change in sleftv (E) |
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| 43 | * IDHDL: existing variable (E) |
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| 44 | * IDHDL: variable, data is idhdl (S) |
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| 45 | * COMMAND: data is command (S) |
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| 46 | * INT_CMD: int constant, data is int (E,S) |
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| 47 | * INTVEC_CMD: intvec constant, data is intvec * (E,S) |
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| 48 | * POLY_CMD: poly constant, data is poly (E,S) |
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| 49 | * .... |
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| 50 | */ |
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| 51 | Subexpr e; /* holds the indices for indexed values */ |
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| 52 | inline void Init() { memset(this,0,sizeof(*this)); } |
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| 53 | void Set(int val); |
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| 54 | void Print(leftv store=NULL,int spaces=0); |
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| 55 | void CleanUp(); |
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| 56 | char * String(void *d=NULL); |
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| 57 | void Copy(leftv e); |
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| 58 | void * CopyD(); |
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| 59 | attr CopyA(); |
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| 60 | void * CopyD(int t); |
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| 61 | inline const char * Name() |
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| 62 | { |
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| 63 | if ((name!=NULL) && (e==NULL)) return name; |
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| 64 | else return sNoName; |
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| 65 | } |
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| 66 | int Typ(); |
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| 67 | int LTyp(); /* returns LIST_CMD for l[i], otherwise returns Typ() */ |
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| 68 | void * Data(); |
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| 69 | leftv LData(); /* returns &(l[i]) for l[i], otherwise returns this */ |
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| 70 | leftv LHdl(); |
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| 71 | attr * Attribute(); |
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| 72 | inline leftv Next() { return next; } |
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| 73 | int listLength(); |
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| 74 | int Eval(); /*replace a COMMAND by its result otherwise by CopyD*/ |
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| 75 | }; |
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| 76 | |
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| 77 | extern sleftv sLastPrinted; |
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| 78 | |
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| 79 | struct _sssym |
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| 80 | { |
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| 81 | idhdl h; |
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| 82 | Subexpr e; |
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| 83 | }; |
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| 84 | typedef struct _sssym ssym; |
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| 85 | typedef ssym * sym; |
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| 86 | |
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| 87 | void syMake(leftv v,char * name); |
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| 88 | BOOLEAN assumeStdFlag(leftv h); |
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| 89 | |
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| 90 | #endif |
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