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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.
34 lines
1.5 KiB
Plaintext
34 lines
1.5 KiB
Plaintext
The '''_MEMGET''' function returns a value from a specific memory block name at the specified OFFSET using a certain variable type.
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{{PageSyntax}}
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::: value = '''_MEMGET(''memory_block'', ''memory_block.OFFSET''''' [+ ''bytes'']''', ''variable_type'')'''
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* Returns a value of the ''variable type'' designated. The holding variable must match that [[TYPE]]!
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* ''memblock'' is the [[_MEM]] variable type name assigned to the block of memory.
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* ''memory block.OFFSET'' is the dot [[OFFSET]] byte zero memory position where block data begins.
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* ''variable type'' is a variable [[TYPE]] like [[_BYTE]], [[INTEGER]], [[SINGLE]], [[DOUBLE]], etc.
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* All values created by memory functions MUST be freed using [[_MEMFREE]] with a valid [[_MEM]] variable.
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''Example:'' [[DEF SEG]] and [[VARPTR]] are no longer necessary to do things in memory just like [[POKE]] and [[PEEK]] do.
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{{CodeStart}} '' ''
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{{Cl|DIM}} o {{Cl|AS}} {{Cl|_MEM}}
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o = {{Cl|_MEM (function)|_MEM}}(d&) 'OLD... o% = VARPTR(d&)
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{{Cl|_MEMPUT}} o, o.OFFSET + 1, 3 {{Cl|AS}} {{Cl|_UNSIGNED}} {{Cl|_BYTE}} 'a POKE
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v = {{Cl|_MEMGET (function)|_MEMGET}}(o, o.OFFSET + 1, {{Cl|_UNSIGNED}} {{Cl|_BYTE}}) 'a PEEK
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{{Cl|PRINT}} v 'prints 3
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{{Cl|PRINT}} d& 'prints 768 because the 2nd byte of d& has been set to 3 or 3 * 256
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{{CodeEnd}}
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:''Explanation:'' The memory block and OFFSET are given by [[_MEMPUT]] and the _MEMGET function, with the designated type.
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''See also:''
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* [[_MEM]]
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* [[_MEMGET]], [[_MEMPUT]]
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* [[_MEMNEW]], [[_MEMFILL]]
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* [[_MEMCOPY]]
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{{PageNavigation}} |