zip_int64_t
_zip_replace(struct zip *za, zip_uint64_t idx, const char *name,
struct zip_source *source)
{
zip_uint64_t za_nentry_prev;
if (ZIP_IS_RDONLY(za)) {
_zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
return -1;
}
za_nentry_prev = za->nentry;
if (idx == ZIP_UINT64_MAX) {
if (_zip_entry_new(za) == NULL)
return -1;
idx = za->nentry - 1;
za->entry[idx].changes.valid |= ZIP_DIRENT_COMP_METHOD;
za->entry[idx].changes.comp_method = ZIP_CM_DEFLATE; /* XXX: default */
}
if (name && _zip_set_name(za, idx, name) != 0) {
za->nentry = za_nentry_prev;
return -1;
}
/* does not change any name related data, so we can do it here;
* needed for a double add of the same file name */
_zip_unchange_data(za->entry+idx);
za->entry[idx].state = ((za->cdir == NULL || idx >= (zip_uint64_t)za->cdir->nentry)
? ZIP_ST_ADDED : ZIP_ST_REPLACED);
za->entry[idx].source = source;
return idx;
}
struct zip *
_zip_open(const char *fn, FILE *fp, int flags, int aflags, int *zep)
{
struct zip *za;
struct zip_cdir *cdir;
int i;
off_t len;
if (fseeko(fp, 0, SEEK_END) < 0) {
*zep = ZIP_ER_SEEK;
return NULL;
}
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
if ((za=_zip_allocate_new(fn, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->cdir = cdir;
za->zp = fp;
if ((za->entry=(struct zip_entry *)malloc(sizeof(*(za->entry))
* cdir->nentry)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
_zip_free(za);
return NULL;
}
for (i=0; i<cdir->nentry; i++)
_zip_entry_new(za);
_zip_check_torrentzip(za);
za->ch_flags = za->flags;
return za;
}
ZIP_EXTERN struct zip *
zip_open(const char *fn, int flags, int *zep)
{
FILE *fp;
struct zip *za;
struct zip_cdir *cdir;
int i;
off_t len;
switch (_zip_file_exists(fn, flags, zep)) {
case -1:
return NULL;
case 0:
return _zip_allocate_new(fn, zep);
default:
break;
}
if ((fp=fopen(fn, "rb")) == NULL) {
set_error(zep, NULL, ZIP_ER_OPEN);
return NULL;
}
fseeko(fp, 0, SEEK_END);
len = ftello(fp);
/* treat empty files as empty archives */
if (len == 0) {
if ((za=_zip_allocate_new(fn, zep)) == NULL)
fclose(fp);
else
za->zp = fp;
return za;
}
cdir = _zip_find_central_dir(fp, flags, zep, len);
if (cdir == NULL) {
fclose(fp);
return NULL;
}
if ((za=_zip_allocate_new(fn, zep)) == NULL) {
_zip_cdir_free(cdir);
fclose(fp);
return NULL;
}
za->cdir = cdir;
za->zp = fp;
if ((za->entry=(struct zip_entry *)malloc(sizeof(*(za->entry))
* cdir->nentry)) == NULL) {
set_error(zep, NULL, ZIP_ER_MEMORY);
_zip_free(za);
return NULL;
}
for (i=0; i<cdir->nentry; i++)
_zip_entry_new(za);
_zip_check_torrentzip(za);
za->ch_flags = za->flags;
return za;
}
