src/utils/list.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <errno.h>
   5
   6 #include "list.h"
   7
   8
   9 void list_print(struct mail_list *lst)
  10 {
  11         size_t n;
  12         int i;
  13
  14         if (!lst)
  15                 return;
  16
  17         for (n = 0; n < lst->n; n++) {
  18                 for (i = 0; i < 16; i++) {
  19                         fprintf(stderr, "%02x", lst->list[n].addr_md5[i]);
  20                 }
  21                 fprintf(stderr, "[%u] %s -- %s -- %s\n",
  22                                 n,
  23                                 lst->list[n].name,
  24                                 lst->list[n].addr,
  25                                 lst->list[n].subj);
  26         }
  27 }
  28
  29 /**
  30  * Allocate a list via malloc of n_elem elements
  31  *
  32  * @param[in|out] n_elem        number of elements in the list
  33  * @param[in]     limit         max number of elements
  34  *
  35  * @retval Pointer to the new allocated list or NULL on error
  36  */
  37 struct mail_list *list_create(size_t n_elem, size_t limit)
  38 {
  39         struct mail_list *lst;
  40
  41         if (n_elem == 0)
  42                 return NULL;
  43
  44         if (n_elem > limit)
  45                 n_elem = limit;
  46
  47         lst = malloc(sizeof(struct mail_list) + n_elem * sizeof(struct mail_entry));
  48         if (!lst) {
  49                 fprintf(stderr, "%s - MALLOC: %s", __func__, strerror(errno));
  50                 return NULL;
  51         }
  52
  53         fprintf(stderr, "%s - MALLOC: item %lu [%lu]\n", __func__,
  54                         (unsigned long) n_elem,
  55                         (unsigned long) (sizeof(struct mail_list) + n_elem * sizeof(struct mail_entry)));
  56
  57         lst->n = n_elem;
  58         lst->nfree = 0;
  59
  60         return lst;
  61 }
  62
  63 void list_free(struct mail_list *lst)
  64 {
  65         if (lst) {
  66                 free(lst);
  67                 lst = NULL;
  68                 fprintf(stderr, "%s - FREE: list\n", __func__);
  69         }
  70 }
  71
  72 int list_add_entry(struct mail_list *lst, struct mail_entry *entry)
  73 {
  74         size_t n = 0;
  75
  76         if (lst->nfree < MESSAGE_LIMIT) {
  77                 n = lst->nfree;
  78                 /* Update List */
  79                 memcpy(&lst->list[n], entry, sizeof(struct mail_entry));
  80
  81                 /* Update 1st free slot index */
  82                 lst->nfree += 1;
  83                 return 0;
  84         }
  85
  86         /* No free slot */
  87         return -1;
  88 }
  89
  90
  91
  92
  93