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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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6e01fc8dce
Added new _STRCMP and _STRICMP commands for quick string comparisons. Cleaned up QB64 to finish removing the QUI (quick user insert) code and folders. Altered UCASE and LCASE routines to be faster in some situations for us.
24 lines
1.2 KiB
Plaintext
24 lines
1.2 KiB
Plaintext
The '''VARPTR''' function returns an [[INTEGER]] value that is the offset part of the variable or array memory address within it's segment.
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{{PageSyntax}}
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:: offset% = VARPTR(variable_name[(reference_index%)])
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* If variablename is not defined before VARPTR or [[VARSEG]] is called, the variable is created and it's address is returned.
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* Reference index is used to set the offset address of an array index, not necessarily the lowest index.
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* When a string variable, VARPTR returns the offset address location of the first byte of the string.
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* Because many Qbasic statements change the locations of variables in memory, use the values returned by VARPTR and VARSEG immediately after the functions are used!
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* Integer array sizes are limited to 32767 elements when using [[VARPTR]] in QB and '''QB64'''!. Create a larger array using [[_BYTE]]. Example: [[DIM]] [[SHARED]] Memory (65535) AS [[_UNSIGNED]] [[_BYTE]]
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* '''Warning: DEF SEG, VARSEG , VARPTR, PEEK or POKE access QB64's emulated 16 bit conventional memory block!'''
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: '''It is highly recommended that QB64's [[_MEM]] memory system be used to avoid running out of memory.'''
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''See also:''
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* [[BSAVE]], [[BLOAD]]
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* [[SADD]], [[DEF SEG]]
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* [[VARPTR$]], [[VARSEG]],
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* [[POKE]], [[PEEK]]
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{{PageNavigation}} |