commit 7f458f4

More listfile functions.

 1@@ -295,7 +295,7 @@ int object_del(const char *id)
 2 }
 3 
 4 
 5-int list_add_md5(const char *fn, const char *md5)
 6+int listfile_add_md5(const char *fn, const char *md5)
 7 /* adds an md5 to a list */
 8 {
 9     int status = 200;
10@@ -314,7 +314,7 @@ int list_add_md5(const char *fn, const char *md5)
11 }
12 
13 
14-int list_del_md5(const char *fn, const char *md5)
15+int listfile_del_md5(const char *fn, const char *md5)
16 /* deletes an md5 from a list */
17 {
18     int status = 404;
19@@ -324,10 +324,9 @@ int list_del_md5(const char *fn, const char *md5)
20         flock(fileno(i), LOCK_EX);
21 
22         xs *nfn = xs_fmt("%s.new", fn);
23+        char line[32 + 1];
24 
25         if ((o = fopen(nfn, "w")) != NULL) {
26-            char line[32 + 1];
27-
28             while (fgets(line, sizeof(line), i) != NULL) {
29                 if (memcmp(line, md5, 32) != 0)
30                     fwrite(line, sizeof(line), 1, o);
31@@ -352,6 +351,65 @@ int list_del_md5(const char *fn, const char *md5)
32 }
33 
34 
35+d_char *listfile_get_n(const char *fn, int max)
36+/* returns a list */
37+{
38+    xs *list = NULL;
39+    FILE *f;
40+    int n = 0;
41+
42+    if ((f = fopen(fn, "r")) != NULL) {
43+        flock(fileno(f), LOCK_SH);
44+
45+        char line[32 + 1];
46+        list = xs_list_new();
47+
48+        while (n < max && fgets(line, sizeof(line), f) != NULL) {
49+            line[32] = '\0';
50+            list = xs_list_append(list, line);
51+            n++;
52+        }
53+
54+        fclose(f);
55+    }
56+
57+    return list;
58+}
59+
60+
61+d_char *listfile_get_inv_n(const char *fn, int max)
62+/* returns a list, inversely */
63+{
64+    xs *list = NULL;
65+    FILE *f;
66+    int n = 0;
67+
68+    if ((f = fopen(fn, "r")) != NULL) {
69+        flock(fileno(f), LOCK_SH);
70+
71+        char line[32 + 1];
72+        list = xs_list_new();
73+
74+        /* move to the end minus one entry */
75+        if (!fseek(f, 0, SEEK_END) && !fseek(f, -sizeof(line), SEEK_SET)) {
76+            while (n < max && fgets(line, sizeof(line), f) != NULL) {
77+                line[32] = '\0';
78+                list = xs_list_append(list, line);
79+                n++;
80+
81+                /* move backwards 2 entries */
82+                if (fseek(f, -sizeof(line) * 2, SEEK_SET) == -1)
83+                    break;
84+            }
85+        }
86+
87+        fclose(f);
88+    }
89+
90+    return list;
91+}
92+
93+
94 d_char *_follower_fn(snac *snac, char *actor)
95 {
96     xs *md5 = xs_md5_hex(actor, strlen(actor));