source: trunk/src/objects/RpChainHelper.c @ 1528

Last change on this file since 1528 was 1528, checked in by dkearney, 15 years ago

updating the objects code and adding some more examples describing how i want developers to use the objects. some of the objects don't work yet, like the tree, anything with an example should work
File size: 2.0 KB
Line 
1#include <string.h>
2#include "RpChainHelper.h"
3
4#ifdef __cplusplus
5extern "C" {
6#endif
7
8Rp_Chain *
9Rp_ChainJoin (
10    Rp_Chain *c1,
11    Rp_Chain *c2)
12{
13    Rp_ChainLink *l = NULL;
14
15    if (c1 == NULL) {
16        return c2;
17    }
18
19    if (c2 == NULL) {
20        return c1;
21    }
22
23    l = Rp_ChainLastLink(c2);
24    while (l != NULL) {
25        Rp_ChainUnlinkLink(c2,l);
26        Rp_ChainPrependLink(c1,l);
27        l = Rp_ChainLastLink(c2);
28    }
29
30    if (Rp_ChainGetLength(c2) != 0) {
31    // FIXME: add error message
32    }
33
34    Rp_ChainDestroy(c2);
35
36    return c1;
37}
38
39Rp_Chain *
40Rp_ChainConcat (
41    Rp_Chain *c1,
42    Rp_Chain *c2)
43{
44    Rp_ChainLink *l = NULL;
45
46    if (c1 == NULL) {
47        return c2;
48    }
49
50    if (c2 == NULL) {
51        return c1;
52    }
53
54    l = Rp_ChainFirstLink(c2);
55    while (l != NULL) {
56        Rp_ChainUnlinkLink(c2,l);
57        Rp_ChainAppendLink(c1,l);
58        l = Rp_ChainFirstLink(c2);
59    }
60
61    return c1;
62}
63
64int
65Rp_ChainCopy (
66    Rp_Chain *c1,
67    Rp_Chain *c2,
68    int (*cpyFxn)(void **to,void *from))
69{
70    void *origVal = NULL;
71    void *copyVal = NULL;
72    Rp_ChainLink *lorig = NULL;
73
74    if ( ( (c1 == NULL) && (c2 == NULL) )
75        || (cpyFxn == NULL) ) {
76        // raise error, improper function call
77        return -1;
78    }
79
80    if (c1 == NULL) {
81        // nothing to copy to
82        return 0;
83    }
84
85    if (c2 == NULL) {
86        // nothing to copy from
87        return 0;
88    }
89
90    lorig = Rp_ChainFirstLink(c2);
91    while (lorig != NULL) {
92        origVal = (void*) Rp_ChainGetValue(lorig);
93        if (cpyFxn(&copyVal,origVal) != 0) {
94            // error while copying
95            return -1;
96        }
97        Rp_ChainAppend(c1,copyVal);
98        lorig = Rp_ChainNextLink(lorig);
99    }
100
101    return 0;
102}
103
104int
105Rp_ChainCharCpyFxn (
106    void **to,
107    void *from)
108{
109    size_t len = 0;
110
111    len = strlen((char*)from);
112    *to = (void*) malloc(len*sizeof(char)+1);
113    strncpy((char*)(*to),(char*)from,len+1);
114    return 0;
115}
116
117int
118Rp_ChainCharCmpFxn (
119    void *to,
120    void *from)
121{
122    return strcmp(to,from);
123}
124
125#ifdef __cplusplus
126}
127#endif
128
Note: See TracBrowser for help on using the repository browser.