Category: Language-Implementation
Superclass: Object
I provide access to actual machine addresses of OOPs and objects. I have no instances; you send messages to my class to map between an object and the address of its OOP or object. In addition I provide direct memory access with different C types (ints, chars, OOPs, floats,...).

Method category index

accessing (class)

accessing (class)

at: anAddress
Access the Smalltalk object (OOP) at the given address.

at: anAddress put: aValue

Store a pointer (OOP) to the Smalltalk object identified by `value' at the given address.

bigEndian

Answer whether we're running on a big- or little-endian system.

charAt: anAddress

Access the C char at the given address. The value is returned as a Smalltalk Character.

charAt: anAddress put: aValue

Store as a C char the Smalltalk Character or Integer object identified by `value', at the given address, using sizeof(char) bytes - i.e. 1 byte.

deref: anAddress

Access the C int pointed by the given address

doubleAt: anAddress

Access the C double at the given address.

doubleAt: anAddress put: aValue

Store the Smalltalk Float object identified by `value', at the given address, writing it like a C double.

floatAt: anAddress

Access the C float at the given address.

floatAt: anAddress put: aValue

Store the Smalltalk Float object identified by `value', at the given address, writing it like a C float.

intAt: anAddress

Access the C int at the given address.

intAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(int) bytes.

longAt: anAddress

Access the C long int at the given address.

longAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(long) bytes.

longDoubleAt: anAddress

Access the C long double at the given address.

longDoubleAt: anAddress put: aValue

Store the Smalltalk Float object identified by `value', at the given address, writing it like a C long double.

shortAt: anAddress

Access the C short int at the given address.

shortAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(short) bytes.

stringAt: anAddress

Access the string pointed by the C `char *' at the given given address.

stringAt: anAddress put: aValue

Store the Smalltalk String object identified by `value', at the given address in memory, writing it like a *FRESHLY ALLOCATED* C string. It is the caller's responsibility to free it if necessary.

ucharAt: anAddress put: aValue

Store as a C char the Smalltalk Character or Integer object identified by `value', at the given address, using sizeof(char) bytes - i.e. 1 byte.

uintAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(int) bytes.

ulongAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(long) bytes.

unsignedCharAt: anAddress

Access the C unsigned char at the given address. The value is returned as a Smalltalk Character.

unsignedCharAt: anAddress put: aValue

Store as a C char the Smalltalk Character or Integer object identified by `value', at the given address, using sizeof(char) bytes - i.e. 1 byte.

unsignedIntAt: anAddress

Access the C unsigned int at the given address.

unsignedIntAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(int) bytes.

unsignedLongAt: anAddress

Access the C unsigned long int at the given address.

unsignedLongAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(long) bytes.

unsignedShortAt: anAddress

Access the C unsigned short int at the given address.

unsignedShortAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(short) bytes.

ushortAt: anAddress put: aValue

Store the Smalltalk Integer object identified by `value', at the given address, using sizeof(short) bytes.

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