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ac678ff7b8
- Script arrays are semantically identical to map arrays: They have fixed
sizes and can be multidimensional. They can also be initialized, although
this is just syntactic sugar. e.g.
int init_array[2] = { 10, 20 }
produces code identical to:
int init_array[2];
init_array[0] = 10;
init_array[1] = 20;
Script arrays are also implicitly initialized to 0, just like any other
variable in ACS.
- Unlike map arrays, they only exist for the life of the script, and each
script gets its own copy of the array.
- Script arrays exists in a separate space from script variables. I did
not repeat the bullshittery of map arrays here. (I still have no idea what I
was thinking when I designed them that way.)
- Each script and function that uses local arrays is recorded with a new
chunk: SARY for scripts and FARY for functions. The first two bytes are the
script/function number, and the rest of the chunk consists of four-byte
integers describing the size (in ints) of each array used by that
script/function. To determine how many arrays a script/function uses,
take the chunk length, subtract two, and divide by four.
131 lines
2.5 KiB
C
131 lines
2.5 KiB
C
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//**************************************************************************
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//**
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//** symbol.h
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//**
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//**************************************************************************
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#ifndef __SYMBOL_H__
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#define __SYMBOL_H__
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// HEADER FILES ------------------------------------------------------------
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#include "common.h"
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#include "pcode.h"
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// MACROS ------------------------------------------------------------------
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#define MAX_ARRAY_DIMS 8
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// TYPES -------------------------------------------------------------------
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typedef enum
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{
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SY_DUMMY,
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SY_LABEL,
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SY_SCRIPTVAR,
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SY_SCRIPTALIAS,
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SY_MAPVAR,
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SY_WORLDVAR,
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SY_GLOBALVAR,
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SY_SCRIPTARRAY,
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SY_MAPARRAY,
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SY_WORLDARRAY,
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SY_GLOBALARRAY,
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SY_SPECIAL,
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SY_CONSTANT,
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SY_INTERNFUNC,
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SY_SCRIPTFUNC
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} symbolType_t;
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typedef struct
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{
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U_BYTE index;
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} symVar_t;
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typedef struct
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{
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U_BYTE index;
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int dimensions[MAX_ARRAY_DIMS];
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int ndim;
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int size;
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} symArray_t;
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typedef struct
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{
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int address;
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} symLabel_t;
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typedef struct
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{
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int value;
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int argCount;
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} symSpecial_t;
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typedef struct
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{
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int value;
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char *strValue;
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int fileDepth;
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} symConstant_t;
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typedef struct
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{
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pcd_t directCommand;
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pcd_t stackCommand;
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int argCount;
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int optMask;
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int outMask;
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boolean hasReturnValue;
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boolean latent;
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} symInternFunc_t;
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typedef struct
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{
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int address;
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int argCount;
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int varCount;
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int funcNumber;
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boolean hasReturnValue;
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int sourceLine;
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char *sourceName;
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boolean predefined;
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} symScriptFunc_t;
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typedef struct symbolNode_s
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{
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struct symbolNode_s *left;
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struct symbolNode_s *right;
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char *name;
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symbolType_t type;
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boolean unused;
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boolean imported;
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union
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{
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symVar_t var;
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symArray_t array;
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symLabel_t label;
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symSpecial_t special;
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symConstant_t constant;
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symInternFunc_t internFunc;
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symScriptFunc_t scriptFunc;
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} info;
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} symbolNode_t;
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// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
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void SY_Init(void);
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symbolNode_t *SY_Find(char *name);
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symbolNode_t *SY_FindLocal(char *name);
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symbolNode_t *SY_FindGlobal(char *name);
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symbolNode_t *SY_InsertLocal(char *name, symbolType_t type);
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symbolNode_t *SY_InsertGlobal(char *name, symbolType_t type);
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symbolNode_t *SY_InsertGlobalUnique(char *name, symbolType_t type);
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void SY_FreeLocals(void);
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void SY_FreeGlobals(void);
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void SY_FreeConstants(int depth);
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void SY_ClearShared(void);
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// PUBLIC DATA DECLARATIONS ------------------------------------------------
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#endif
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