1 /* Operations depending on program specifics. 2 */ 3 4 #include <stdlib.h> 5 #include "types.h" 6 #include "ops.h" 7 #include "progconsts.h" 8 #include "progops.h" 9 #include "progtypes.h" 10 #include <stdio.h> 11 12 /* Generic instantiation operations, defining common members. */ 13 14 __attr __new(const __table * table, __ref cls, int size) 15 { 16 __ref obj = calloc(1, size); 17 __attr self = {obj, obj}; 18 __attr tmp = {0, cls}; 19 obj->table = table; 20 __store_via_object(obj, __pos___class__, tmp); 21 return self; 22 } 23 24 /* Generic invocation operations. */ 25 26 /* Invoke the given callable, supplying keyword argument details in the given 27 codes and arguments arrays, indicating the number of arguments described. 28 The number of positional arguments is specified, and such arguments then 29 follow as conventional function arguments. Typically, at least one argument 30 is specified, starting with any context argument. 31 */ 32 33 __attr __invoke(__attr callable, 34 unsigned int nkwargs, __param kwcodes[], __attr kwargs[], 35 unsigned int nargs, __attr args[]) 36 { 37 /* Obtain the __args__ special member, referencing the parameter table. */ 38 39 __attr minparams = __load_via_object(callable.value, __pos___args__); 40 41 /* Refer to the table and minimum/maximum. */ 42 43 const __ptable *ptable = minparams.ptable; 44 const unsigned int min = minparams.min, max = ptable->size; 45 46 /* Reserve enough space for the arguments. */ 47 48 __attr allargs[max]; 49 50 /* Traverse the arguments. */ 51 52 unsigned int pos, kwpos; 53 54 /* Check the number of arguments. */ 55 56 if ((min > (nargs + nkwargs)) || ((nargs + nkwargs) > max)) 57 return null; 58 59 /* Copy the arguments. */ 60 61 for (pos = 0; pos < nargs; pos++) 62 allargs[pos] = args[pos]; 63 64 /* Erase the remaining arguments. */ 65 66 for (pos = nargs; pos < max; pos++) 67 { 68 allargs[pos].value = 0; 69 } 70 71 /* Fill keyword arguments. */ 72 73 for (kwpos = 0; kwpos < nkwargs; kwpos++) 74 { 75 pos = __HASPARAM(ptable, kwcodes[kwpos].pos, kwcodes[kwpos].code); 76 77 /* Check the table entry against the supplied argument details. 78 Set the argument but only if it does not overwrite positional 79 arguments. */ 80 81 if ((pos == -1) || (pos < nargs)) 82 return null; 83 84 /* Set the argument using the appropriate position. */ 85 86 allargs[pos] = kwargs[kwpos]; 87 } 88 89 /* Fill the defaults. */ 90 91 for (pos = nargs; pos < max; pos++) 92 { 93 if (allargs[pos].value == 0) 94 allargs[pos] = __GETDEFAULT(callable.value, pos - nargs); 95 } 96 97 /* Call with the prepared arguments. */ 98 99 return __load_via_object(callable.value, __pos___fn__).fn(allargs); 100 } 101 102 /* Error routines. */ 103 104 __attr __unbound_method(__attr args[]) 105 { 106 /* NOTE: Should raise an exception. */ 107 108 fprintf(stderr, "Unbound method called!\n"); 109 exit(1); 110 } 111 112 /* Generic operations depending on specific program details. */ 113 114 void __SETDEFAULT(__ref obj, int pos, __attr value) 115 { 116 __store_via_object(obj, __FUNCTION_INSTANCE_SIZE + pos, value); 117 } 118 119 __attr __GETDEFAULT(__ref obj, int pos) 120 { 121 return __load_via_object(obj, __FUNCTION_INSTANCE_SIZE + pos); 122 }