zip_add_entry.c File Reference

#include <stdlib.h>
#include "zipint.h"

Go to the source code of this file.

Functions
zip_int64_t	_zip_add_entry (zip_t *za)

Function Documentation

_zip_add_entry()

zip_int64_t _zip_add_entry

(

zip_t *

za

)

Definition at line 43 of file zip_add_entry.c.

                          {
    zip_uint64_t idx;
 
    if (za->nentry + 1 >= za->nentry_alloc) {
        zip_entry_t *rentries;
        zip_uint64_t nalloc = za->nentry_alloc;
        zip_uint64_t additional_entries = 2 * nalloc;
        zip_uint64_t realloc_size;
 
        if (additional_entries < 16) {
            additional_entries = 16;
        }
        else if (additional_entries > 1024) {
            additional_entries = 1024;
        }
        /* neither + nor * overflows can happen: nentry_alloc * sizeof(struct zip_entry) < UINT64_MAX */
        nalloc += additional_entries;
        realloc_size = sizeof(struct zip_entry) * (size_t)nalloc;
 
        if (sizeof(struct zip_entry) * (size_t)za->nentry_alloc > realloc_size) {
            zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
            return -1;
        }
        rentries = (zip_entry_t *)realloc(za->entry, sizeof(struct zip_entry) * (size_t)nalloc);
        if (!rentries) {
            zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
            return -1;
        }
        za->entry = rentries;
        za->nentry_alloc = nalloc;
    }
 
    idx = za->nentry++;
 
    _zip_entry_init(za->entry + idx);
 
    return (zip_int64_t)idx;
}

References _zip_entry_init(), zip::entry, zip::error, setup::idx, zip::nentry, zip::nentry_alloc, realloc(), za, ZIP_ER_MEMORY, and zip_error_set().

Referenced by _zip_file_replace().