1 /* Common operations for native functions. 2 3 Copyright (C) 2016, 2017 Paul Boddie <paul@boddie.org.uk> 4 5 This program is free software; you can redistribute it and/or modify it under 6 the terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3 of the License, or (at your option) any later 8 version. 9 10 This program is distributed in the hope that it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 12 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 13 details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include "types.h" 20 #include "exceptions.h" 21 #include "ops.h" 22 #include "progconsts.h" 23 #include "progops.h" 24 #include "progtypes.h" 25 #include "main.h" 26 27 /* Utility functions. */ 28 29 __attr __new_int(int i) 30 { 31 /* Create a new integer and mutate the __data__ attribute. */ 32 __attr attr = __new(&__InstanceTable___builtins___int_int, &__builtins___int_int, sizeof(__obj___builtins___int_int)); 33 attr.value->attrs[__pos___data__].intvalue = i; 34 return attr; 35 } 36 37 __attr __new_str(char *s) 38 { 39 /* Create a new string and mutate the __data__ and __key__ attributes. */ 40 __attr attr = __new(&__InstanceTable___builtins___str_string, &__builtins___str_string, sizeof(__obj___builtins___str_string)); 41 attr.value->attrs[__pos___data__].strvalue = s; 42 attr.value->attrs[__pos___key__] = __NULL; 43 return attr; 44 } 45 46 __attr __new_list(__fragment *f) 47 { 48 /* Create a new list and mutate the __data__ attribute. */ 49 __attr attr = __new(&__InstanceTable___builtins___list_list, &__builtins___list_list, sizeof(__obj___builtins___list_list)); 50 attr.value->attrs[__pos___data__].seqvalue = f; 51 return attr; 52 } 53 54 __fragment *__fragment_append(__fragment *data, __attr * const value) 55 { 56 __fragment *newdata = data; 57 unsigned int size = data->size, capacity = data->capacity; 58 unsigned int n; 59 60 /* Re-allocate the fragment if the capacity has been reached. */ 61 if (size >= capacity) 62 { 63 /* NOTE: Consider various restrictions on capacity increases. */ 64 n = capacity ? capacity * 2 : 1; 65 newdata = (__fragment *) __REALLOCATE(data, __FRAGMENT_SIZE(n)); 66 newdata->capacity = n; 67 } 68 69 /* Insert the new element and increment the list size. */ 70 newdata->attrs[size] = *value; 71 newdata->size = size + 1; 72 73 return newdata; 74 }