These file contains a collection of non-configurable limits: Program properties ================== * maximum program length: 1 MB (1048575 Bytes) This is defined by FUNSTART_MASK in exec.h, which is the maximum offset (address) of a functions code within the program block (relativ to the beginning). Changing it involves changing funflag_t and probably other stuff. * maximum number of programs: 2^32-1 The unique program ID number is a int32. It is incremented for each compiled program. If it reaches zero (after wrapping to negative values) the compiler or swapper calls renumber_programs(), which recycles numbers from old programs. (exec.h, prolang.y, swap.c, ...) * maximum number of functions in a program: 65534 The lookup table for function indexes holding the offsets of the function in the functions tables is unsigned short. The types of function arguments are stored in program_s.argument_types, which is index by the unsigned short programs_s.type_start. 65535 has a special meaning. Some code relies that this is unsigned short. (exec.h, ...) program_s.num_function_names and num_functions are unsigned short as well. * maximum length of switch: 256k (262143 Bytes) Limited by BREAK_ADDRESS_MASK and CONTINUE_ADDRESS_MASK? * maximum offset for branches: 32765 (0x7ffd) (prolang.y) * number of virtual variables: 255 * number of global variables: 65536 (F_IDENTIFIER16) * number of local variables: 256 (F_PUSH_LOCAL_VARIABLE_LVALUE) * number of context variables: 256 (Should be consistent with local variables, MAX_LOCAL applies to both. 16 bit opcodes are not used yet.) * max number of struct members: 255 (exec.h, ...) Hash tables =========== * maximum size of the hash table for identifiers (ITABLE): 32768 The hashes of identifiers are signed short which are in most cases 16 bit wide integers (lex.h, lex.c, ...) * maximum size of the hash table for objects (OTABLE): 65536 * maximum size of the hash table for shared strings (HTABLE): 65536 The hashes are of type unsigned short which are in most cases 16 bit wide integers. Objects ======= * maximum clone ID number: 2^32-1 Not a real limitation, after that the driver starts checking if blueprint name + #cloneid are unique. Memory management ================= * max. size of single large block in slaballo.c and smalloc.c: 0x07ffffff (134217727, defined by M_MASK)
