Ada-Changer

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• How are task priorities handled?

  When a task is created, a run-time routine is called, with the specified task priority as a parameter. If you are using the OS Abstractor, these priorities are passed through to the underlying RTOS. I...

• How are "for" loops and "while" loops handled in Ada C/C++ Changer? Will this implement jump statements?.

  Both for loops and while loops in Ada become while loops in C. We don't use jump statements in the generated C unless the original Ada had a goto. ...

• How are Ada Classes translated/implemented in C++

  They become structs in the generated C++, with separate tables of function pointers used to implement Ada's dispatching operations. ...

• How are Ada rep-spec 'use at or 'size clauses translated? (iow. how does a record (or variable) get mapped to an address with correct size).

  Appropriate padding or packing is specified to ensure the generated C struct matches the specified 'size. For use at (i.e. for X'Address use ...) a pointer is used in the C code, with the pointer init...

• Ada isn't case sensitive and there may be some variables of correct name which have incorrect case. How is this handled with case sensitive C? Does the capitalization of the declaration take precedence?

  Ada C/C++ Changer has several different options. The default is to canonicalize the spelling so the first letter is capitalized and the others are lower case in the generated C source code. Ada C/C++ ...

• Is there a concern while using of computations with 'pred, 'last, 'first and expressions using them giving the correct answer

  A table is used to ensure that 'pred, 'last, etc. produce the right answer, even for enumerations with holes in the representation....

• How are Ada arrays with enumerated indices handled? (i.e. Ada allows array indices to start with non-zero, even non-numeric values) How is this mapped to C which must always start at zero?

  Enumerated indices are not generally a special case, as enumeration values may be used as indices in C. However, if the Ada enumeration type has an enumeration rep clause which leaves holes in the enu...

• How are Ada packed arrays handled? Are they converted to strings? and if so, do you add 1 extra byte for the null?

  Packed arrays are referenced as byte-arrays in C, with appropriate shifting and masking to handle cases where the elements are less than 8-bits/element. We don't generally add an extra byte. Ada strin...

• If we have this mapped to a variable-member in a record/rep-spec can we simply assign to it or do we have to do additional mathematics to get the delta of the LSB's to be correct?

  The generated C has exactly the same semantics as the original Ada source code. You don't have to do any manual fixups....

• How are fixed and scaled integer/floats handled (i.e. Ada delta).

  Ada fixed-point types are translated to C integer types, with run-time routines used for special operations such as fixed-fixed multiply and divide where the built-in C operators don't do the right th...