ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change
on this file since 21cf101 was
48b7085e,
checked in by Aaron Moss <a3moss@…>, 6 years ago
|
Start into generic types design in thesis
|
-
Property mode set to
100644
|
File size:
878 bytes
|
Line | |
---|
1 | #include <stdlib.h> |
---|
2 | #include <stdio.h> |
---|
3 | #include <string.h> |
---|
4 | |
---|
5 | // single code implementation |
---|
6 | |
---|
7 | struct list { void* value; struct list* next; }; |
---|
8 | |
---|
9 | // internal memory management requires helper functions |
---|
10 | |
---|
11 | void list_insert( struct list** ls, void* x, void* (*copy)(void*) ) { |
---|
12 | struct list* node = malloc(sizeof(struct list)); |
---|
13 | node->value = copy(x); node->next = *ls; |
---|
14 | *ls = node; |
---|
15 | } |
---|
16 | |
---|
17 | void* list_head( const struct list* ls ) { return ls->value; } |
---|
18 | |
---|
19 | // helpers duplicated per type |
---|
20 | |
---|
21 | void* int_copy(void* x) { |
---|
22 | int* n = malloc(sizeof(int)); |
---|
23 | *n = *(int*)x; |
---|
24 | return n; |
---|
25 | } |
---|
26 | |
---|
27 | void* string_copy(void* x) { return strdup((const char*)x); } |
---|
28 | |
---|
29 | int main() { |
---|
30 | struct list* il = NULL; |
---|
31 | int i = 42; |
---|
32 | list_insert( &il, &i, int_copy ); |
---|
33 | printf("%d\n", *(int*)list_head(il)); // unsafe type cast |
---|
34 | |
---|
35 | struct list* sl = NULL; |
---|
36 | list_insert( &sl, "hello", string_copy ); |
---|
37 | printf("%s\n", (char*)list_head(sl)); |
---|
38 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.