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JSAPI.h

JSAPI.h 2.9 KB
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  1. #pragma once
    2. 

  2. 

  3. // helper functions for IDispatch
    4. 

  4. #define JSAPI_PARAM_INDEX(paramInfo, paramNumber) (paramInfo->cArgs - paramNumber)
    5. 

  5. #define JSAPI_PARAM_EXISTS(paramInfo, paramNumber) (paramInfo->cArgs >= paramNumber)
    6. 

  6. #define JSAPI_NUM_PARAMS(paramInfo) (paramInfo->cArgs)
    7. 

  7. #define JSAPI_VERIFY_PARAMCOUNT(paramInfo, count) if (paramInfo->cArgs != count) return DISP_E_BADPARAMCOUNT
    8. 

  8. #define JSAPI_VERIFY_PARAMCOUNT_OPTIONAL(paramInfo, minParams, maxParams) if (paramInfo->cArgs < minParams || paramInfo->cArgs > maxParams) return DISP_E_BADPARAMCOUNT
    9. 

  9. #define JSAPI_VERIFY_PARAMTYPE(paramInfo, paramNumber, paramType, argErr) if (paramInfo->rgvarg[paramInfo->cArgs - paramNumber].vt != paramType) { *argErr = paramInfo->cArgs - paramNumber; return DISP_E_TYPEMISMATCH; }
    10. 

  10. #define JSAPI_VERIFY_PARAMTYPE_OPTIONAL(paramInfo, paramNumber, paramType, argErr) if (JSAPI_PARAM_EXISTS(paramInfo, paramNumber) && paramInfo->rgvarg[paramInfo->cArgs - paramNumber].vt != paramType) { *argErr = paramInfo->cArgs - paramNumber; return DISP_E_TYPEMISMATCH; }
    11. 

  11. #define JSAPI_GETSTRING(str, paramInfo, paramNumber, argErr) switch(paramInfo->rgvarg[paramInfo->cArgs - paramNumber].vt) { case VT_BSTR: str = paramInfo->rgvarg[paramInfo->cArgs - paramNumber].bstrVal; break; default: *argErr = paramInfo->cArgs - paramNumber; return DISP_E_TYPEMISMATCH; }
    12. 

  12. #define JSAPI_GETNUMBER_AS_STRING(str, buffer, paramInfo, paramNumber, argErr) \
    13. 

  13. 		if (JSAPI_PARAM(paramInfo, paramNumber).vt == VT_I4) {\
    14. 

  14. 		int val_int = JSAPI_PARAM(paramInfo, paramNumber).lVal;\
    15. 

  15. 		StringCbPrintfW(buffer, sizeof(buffer), L"%d", val_int);\
    16. 

  16. 		str = buffer;\
    17. 

  17. 	}	else if (JSAPI_PARAM(paramInfo, paramNumber).vt == VT_BSTR)\
    18. 

  18. 		str = JSAPI_PARAM(paramInfo, paramNumber).bstrVal;\
    19. 

  19. 	else {\
    20. 

  20. 		if (argErr) *argErr = paramInfo->cArgs - paramNumber;\
    21. 

  21. 		return DISP_E_TYPEMISMATCH;\
    22. 

  22. 	}
    23. 

  23. #define JSAPI_GETUNSIGNED_AS_NUMBER(num, paramInfo, paramNumber, argErr) \
    24. 

  24. 		if (JSAPI_PARAM(paramInfo, paramNumber).vt == VT_I4) num = (UINT)JSAPI_PARAM(paramInfo, paramNumber).lVal;\
    25. 

  25. 	else if (JSAPI_PARAM(paramInfo, paramNumber).vt == VT_BSTR) num = wcstoul(JSAPI_PARAM(paramInfo, paramNumber).bstrVal,0, 10);	\
    26. 

  26. 	else		return DISP_E_TYPEMISMATCH;
    27. 

  27. 

  28. 

  29. #define JSAPI_PARAM(paramInfo, paramNumber) (paramInfo->rgvarg[paramInfo->cArgs - paramNumber])
    30. 

  30. #define JSAPI_PARAM_OPTIONAL(paramInfo, paramNumber, dispID, opt) (JSAPI_PARAM_EXISTS(paramInfo, paramNumber)?paramInfo->rgvarg[paramInfo->cArgs - paramNumber].##dispID:(opt))
    31. 

  31. #define JSAPI_VERIFY_METHOD(flags) if (!(wFlags & DISPATCH_METHOD)) return DISP_E_MEMBERNOTFOUND
    32. 

  32. #define JSAPI_INIT_RESULT(result, type) if (result) { VariantInit(result); V_VT(result) = type; }
    33. 

  33. #define JSAPI_SET_RESULT(result, field, value) if (result) { (result)->field = value; }
    34. 

  34. #define JSAPI_EMPTY_RESULT(result) if (result) { V_VT(result) = VT_EMPTY; }
    35. 

  35. #define JSAPI_SET_VARIANT(result, macro, value) if (result) { macro(result) = value; }
    36. 

  36. #define JSAPI_DISP_ENUMIFY(x) __jsapi__enum__ ## x
    37.