src/strll.c



    1 // GPGEdit edits GPG encrypted files
    2 // Copyright (C) 2018  Aaron Ball <nullspoon@oper.io>
    3 //
    4 // This program is free software: you can redistribute it and/or modify
    5 // it under the terms of the GNU General Public License as published by
    6 // the Free Software Foundation, either version 3 of the License, or
    7 // (at your option) any later version.
    8 //
    9 // This program is distributed in the hope that it will be useful,
   10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
   11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   12 // GNU General Public License for more details.
   13 //
   14 // You should have received a copy of the GNU General Public License
   15 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
   16 
   17 #include "strll.h"
   18 
   19 struct strll* strll_new() {
   20   struct strll* out;
   21   out = malloc(sizeof(struct strll));
   22   out->next = NULL;
   23   out->str  = NULL;
   24 
   25   return out;
   26 }
   27 
   28 
   29 struct strll* strll_add(struct strll* listitem, char* str) {
   30   struct strll* cur = listitem;
   31 
   32   // If str == null, we're inside the first item of a new list
   33   if(cur->str == NULL) {
   34     cur->str  = malloc(sizeof(char) * (strlen(str) + 1));
   35     strcpy(cur->str, str);
   36     cur->next = NULL;
   37     return cur;
   38   }
   39 
   40   // Traverse to the last item in the list
   41   while(cur->next != NULL)
   42     cur = cur->next;
   43 
   44   // Allocate the next item and update the next pointer
   45   cur->next   = malloc(sizeof(struct strll));
   46   // Repoint cur to the newly allocated struct
   47   cur = cur->next;
   48 
   49   // Allocate string, copy in, and set next to null
   50   cur->str  = malloc(sizeof(char) * (strlen(str) + 1));
   51   strcpy(cur->str, str);
   52   cur->next = NULL;
   53 
   54   return cur;
   55 }
   56 
   57 
   58 void strll_release(struct strll* listitem) {
   59   struct strll* item = listitem;
   60   struct strll* next = NULL;
   61 
   62   while(item != NULL) {
   63     next = item->next;
   64     free(item->str);
   65     free(item);
   66     item = next;
   67   }
   68 }
   69 
   70 
   71 void strll_dump(struct strll* listitem) {
   72   struct strll* cur = listitem;
   73   while(cur != NULL) {
   74     printf("%s\n", cur->str);
   75     cur = cur->next;
   76   }
   77 }