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Much extended StudyExpr

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2681 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2003-11-23 21:39:30 +00:00
parent f99049f84c
commit 49f72c6d24
3 changed files with 1173 additions and 340 deletions
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61
src/ca65/studyexpr.h
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@@ -49,20 +49,61 @@
/* Flags */
#define ED_OK 0x00 /* Nothing special */
#define ED_TOO_COMPLEX 0x01 /* Expression is too complex */
/* Symbol reference */
typedef struct ED_SymRef ED_SymRef;
struct ED_SymRef {
long Count; /* Number of references */
struct SymEntry* Ref; /* Actual reference */
};
/* Section reference */
typedef struct ED_SecRef ED_SecRef;
struct ED_SecRef {
long Count; /* Number of references */
unsigned Ref; /* Actual reference */
};
/* Structure for parsing expression trees */
typedef struct ExprDesc ExprDesc;
struct ExprDesc {
unsigned short Flags; /* See ED_xxx */
unsigned char AddrSize; /* Address size of the expression */
long Val; /* The offset value */
long Left; /* Left value for StudyBinaryExpr */
int TooComplex; /* Expression is too complex to evaluate */
long SymCount; /* Symbol reference count */
long SecCount; /* Section reference count */
struct SymEntry* SymRef; /* Symbol reference if any */
unsigned SecRef; /* Section reference if any */
long Right; /* Right value for StudyBinaryExpr */
/* Symbol reference management */
unsigned SymCount; /* Number of symbols referenced */
unsigned SymLimit; /* Memory allocated */
ED_SymRef* SymRef; /* Symbol references */
/* Section reference management */
unsigned SecCount; /* Number of sections referenced */
unsigned SecLimit; /* Memory allocated */
ED_SecRef* SecRef; /* Section references */
};
/*****************************************************************************/
/* struct ExprDesc */
/*****************************************************************************/
ExprDesc* ED_Init (ExprDesc* ED);
/* Initialize an ExprDesc structure for use with StudyExpr */
void ED_Done (ExprDesc* ED);
/* Delete allocated memory for an ExprDesc. */
int ED_IsConst (const ExprDesc* ED);
/* Return true if the expression is constant */
/*****************************************************************************/
/* Code */
@@ -70,13 +111,7 @@ struct ExprDesc {
ExprDesc* InitExprDesc (ExprDesc* ED);
/* Initialize an ExprDesc structure for use with StudyExpr */
int ExprDescIsConst (const ExprDesc* ED);
/* Return true if the expression is constant */
void StudyExpr (ExprNode* Expr, ExprDesc* D, int Sign);
void StudyExpr (ExprNode* Expr, ExprDesc* D);
/* Study an expression tree and place the contents into D */