/* Provenance: Firefox libmar mar_insert_item after CVE-2020-15667.
 * repo: mozilla-central
 * commit: b79b6cc78248eea7fda10bfb76aa273c19c9fa65
 * parent: 0c0f777161a9499dd149853ff62d356f75d16c2a
 * commit_url: https://hg.mozilla.org/mozilla-central/rev/b79b6cc78248eea7fda10bfb76aa273c19c9fa65
 * phabricator: https://phabricator.services.mozilla.com/rMOZILLACENTRALb79b6cc78248eea7fda10bfb76aa273c19c9fa65
 * cve: CVE-2020-15667
 * bug: 1653371
 * license: MPL-2.0
 * function: mar_insert_item
 * relpath: modules/libmar/src/mar_read.c
 */
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

typedef struct MarItem_ {
    struct MarItem_ *next;
    uint32_t offset;
    uint32_t length;
    uint32_t flags;
    char name[1];
} MarItem;

typedef struct {
    MarItem *item_table[256];
} MarFile;

static uint32_t mar_hash_name(const char *name) {
    (void)name;
    return 0;
}

static int mar_insert_item(MarFile *mar, const char *name, uint32_t namelen, uint32_t offset, uint32_t length, uint32_t flags) {
    MarItem *item, *root;
    uint32_t hash;

    item = (MarItem *)malloc(sizeof(MarItem) + namelen);
    if (!item) {
        return -1;
    }
    item->next = NULL;
    item->offset = offset;
    item->length = length;
    item->flags = flags;
    memcpy(item->name, name, namelen + 1);

    hash = mar_hash_name(name);

    root = mar->item_table[hash];
    if (!root) {
        mar->item_table[hash] = item;
    } else {
        /* append item */
        while (root->next) root = root->next;
        root->next = item;
    }
    return 0;
}