1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include "pathmap.h"

5 #include "rbtree.h"

6

7 static void map_entry_destructor(struct rbnode *node, void *data);

8

9 static struct rbtree *map;

10

11 int pkio_map(const char *from, const char *to)

12 {

13 char *myfrom, *myto;

14

15 if(!map) {

16 if(!(map = rb_create(RB_KEY_STRING))) {

17 fprintf(stderr, "packio: failed to create the path mapping tree\n");

18 return -1;

19 }

20 rb_set_delete_func(map, map_entry_destructor, 0);

21 }

22

23 if(!(myfrom = malloc(strlen(from) + 1))) {

24 fprintf(stderr, "packio: failed to allocate mapping source string\n");

25 return -1;

26 }

27 if(!(myto = malloc(strlen(to) + 1))) {

28 fprintf(stderr, "packio: failed to allocate mapping destination string\n");

29 free(myto);

30 return -1;

31 }

32 strcpy(myfrom, from);

33 strcpy(myto, to);

34

35 if(rb_insert(map, myfrom, myto) == -1) {

36 fprintf(stderr, "packio: failed to add path mapping\n");

37 free(myfrom);

38 free(myto);

39 return -1;

40 }

41 return 0;

42 }

43

44 const char *pkio_pathmap(const char *path)

45 {

46 struct rbnode *node;

47

48 if(!map) {

49 return path;

50 }

51

52 if(!(node = rb_find(map, (void*)path))) {

53 return path;

54 }

55 return node->data;

56 }

57

58 static void map_entry_destructor(struct rbnode *node, void *data)

59 {

60 free(node->key);

61 free(node->data);

62 }