173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/*
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* (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Licensed under the GPLv2.
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*/
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#include "strlist.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static
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struct rb_node *strlist__node_new(struct rblist *rblist, const void *entry)
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{
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const char *s = entry;
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struct rb_node *rc = NULL;
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struct strlist *strlist = container_of(rblist, struct strlist, rblist);
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struct str_node *snode = malloc(sizeof(*snode));
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if (snode != NULL) {
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if (strlist->dupstr) {
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s = strdup(s);
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if (s == NULL)
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goto out_delete;
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}
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snode->s = s;
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rc = &snode->rb_node;
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}
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return rc;
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out_delete:
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free(snode);
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return NULL;
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}
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static void str_node__delete(struct str_node *snode, bool dupstr)
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{
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if (dupstr)
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free((void *)snode->s);
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free(snode);
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}
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static
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void strlist__node_delete(struct rblist *rblist, struct rb_node *rb_node)
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{
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struct strlist *slist = container_of(rblist, struct strlist, rblist);
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struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
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str_node__delete(snode, slist->dupstr);
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}
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static int strlist__node_cmp(struct rb_node *rb_node, const void *entry)
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{
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const char *str = entry;
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struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
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return strcmp(snode->s, str);
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}
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int strlist__add(struct strlist *slist, const char *new_entry)
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{
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return rblist__add_node(&slist->rblist, new_entry);
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}
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int strlist__load(struct strlist *slist, const char *filename)
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{
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char entry[1024];
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int err;
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FILE *fp = fopen(filename, "r");
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if (fp == NULL)
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return errno;
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while (fgets(entry, sizeof(entry), fp) != NULL) {
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const size_t len = strlen(entry);
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if (len == 0)
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continue;
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entry[len - 1] = '\0';
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err = strlist__add(slist, entry);
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if (err != 0)
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goto out;
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}
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err = 0;
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out:
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fclose(fp);
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return err;
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}
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void strlist__remove(struct strlist *slist, struct str_node *snode)
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{
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rblist__remove_node(&slist->rblist, &snode->rb_node);
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}
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struct str_node *strlist__find(struct strlist *slist, const char *entry)
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{
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struct str_node *snode = NULL;
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struct rb_node *rb_node = rblist__find(&slist->rblist, entry);
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if (rb_node)
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snode = container_of(rb_node, struct str_node, rb_node);
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return snode;
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}
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static int strlist__parse_list_entry(struct strlist *slist, const char *s)
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{
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if (strncmp(s, "file://", 7) == 0)
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return strlist__load(slist, s + 7);
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return strlist__add(slist, s);
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}
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int strlist__parse_list(struct strlist *slist, const char *s)
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{
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char *sep;
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int err;
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while ((sep = strchr(s, ',')) != NULL) {
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*sep = '\0';
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err = strlist__parse_list_entry(slist, s);
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*sep = ',';
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if (err != 0)
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return err;
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s = sep + 1;
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}
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return *s ? strlist__parse_list_entry(slist, s) : 0;
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}
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struct strlist *strlist__new(bool dupstr, const char *list)
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{
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struct strlist *slist = malloc(sizeof(*slist));
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if (slist != NULL) {
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rblist__init(&slist->rblist);
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slist->rblist.node_cmp = strlist__node_cmp;
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slist->rblist.node_new = strlist__node_new;
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slist->rblist.node_delete = strlist__node_delete;
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slist->dupstr = dupstr;
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if (slist && strlist__parse_list(slist, list) != 0)
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goto out_error;
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}
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return slist;
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out_error:
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free(slist);
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return NULL;
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}
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void strlist__delete(struct strlist *slist)
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{
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if (slist != NULL)
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rblist__delete(&slist->rblist);
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}
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struct str_node *strlist__entry(const struct strlist *slist, unsigned int idx)
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{
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struct str_node *snode = NULL;
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struct rb_node *rb_node;
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rb_node = rblist__entry(&slist->rblist, idx);
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if (rb_node)
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snode = container_of(rb_node, struct str_node, rb_node);
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return snode;
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}
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