mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-26 23:10:38 +00:00
356 lines
8.6 KiB
C
356 lines
8.6 KiB
C
/*
|
|
zip_extra_field_api.c -- public extra fields API functions
|
|
Copyright (C) 2012-2019 Dieter Baron and Thomas Klausner
|
|
|
|
This file is part of libzip, a library to manipulate ZIP archives.
|
|
The authors can be contacted at <libzip@nih.at>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the
|
|
distribution.
|
|
3. The names of the authors may not be used to endorse or promote
|
|
products derived from this software without specific prior
|
|
written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
|
|
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
|
|
#include "zipint.h"
|
|
|
|
|
|
ZIP_EXTERN int
|
|
zip_file_extra_field_delete(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_idx, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (((flags & ZIP_EF_BOTH) == ZIP_EF_BOTH) && (ef_idx != ZIP_EXTRA_FIELD_ALL)) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
|
|
return -1;
|
|
|
|
if (ZIP_IS_RDONLY(za)) {
|
|
zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_file_extra_field_prepare_for_change(za, idx) < 0)
|
|
return -1;
|
|
|
|
de = za->entry[idx].changes;
|
|
|
|
de->extra_fields = _zip_ef_delete_by_id(de->extra_fields, ZIP_EXTRA_FIELD_ALL, ef_idx, flags);
|
|
return 0;
|
|
}
|
|
|
|
|
|
ZIP_EXTERN int
|
|
zip_file_extra_field_delete_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (((flags & ZIP_EF_BOTH) == ZIP_EF_BOTH) && (ef_idx != ZIP_EXTRA_FIELD_ALL)) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
|
|
return -1;
|
|
|
|
if (ZIP_IS_RDONLY(za)) {
|
|
zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_file_extra_field_prepare_for_change(za, idx) < 0)
|
|
return -1;
|
|
|
|
de = za->entry[idx].changes;
|
|
|
|
de->extra_fields = _zip_ef_delete_by_id(de->extra_fields, ef_id, ef_idx, flags);
|
|
return 0;
|
|
}
|
|
|
|
|
|
ZIP_EXTERN const zip_uint8_t *
|
|
zip_file_extra_field_get(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_idx, zip_uint16_t *idp, zip_uint16_t *lenp, zip_flags_t flags) {
|
|
static const zip_uint8_t empty[1] = {'\0'};
|
|
|
|
zip_dirent_t *de;
|
|
zip_extra_field_t *ef;
|
|
int i;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return NULL;
|
|
}
|
|
|
|
if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL)
|
|
return NULL;
|
|
|
|
if (flags & ZIP_FL_LOCAL)
|
|
if (_zip_read_local_ef(za, idx) < 0)
|
|
return NULL;
|
|
|
|
i = 0;
|
|
for (ef = de->extra_fields; ef; ef = ef->next) {
|
|
if (ef->flags & flags & ZIP_EF_BOTH) {
|
|
if (i < ef_idx) {
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
if (idp)
|
|
*idp = ef->id;
|
|
if (lenp)
|
|
*lenp = ef->size;
|
|
if (ef->size > 0)
|
|
return ef->data;
|
|
else
|
|
return empty;
|
|
}
|
|
}
|
|
|
|
zip_error_set(&za->error, ZIP_ER_NOENT, 0);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
ZIP_EXTERN const zip_uint8_t *
|
|
zip_file_extra_field_get_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, zip_uint16_t *lenp, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return NULL;
|
|
}
|
|
|
|
if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL)
|
|
return NULL;
|
|
|
|
if (flags & ZIP_FL_LOCAL)
|
|
if (_zip_read_local_ef(za, idx) < 0)
|
|
return NULL;
|
|
|
|
return _zip_ef_get_by_id(de->extra_fields, lenp, ef_id, ef_idx, flags, &za->error);
|
|
}
|
|
|
|
|
|
ZIP_EXTERN zip_int16_t
|
|
zip_file_extra_fields_count(zip_t *za, zip_uint64_t idx, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
zip_extra_field_t *ef;
|
|
zip_uint16_t n;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL)
|
|
return -1;
|
|
|
|
if (flags & ZIP_FL_LOCAL)
|
|
if (_zip_read_local_ef(za, idx) < 0)
|
|
return -1;
|
|
|
|
n = 0;
|
|
for (ef = de->extra_fields; ef; ef = ef->next)
|
|
if (ef->flags & flags & ZIP_EF_BOTH)
|
|
n++;
|
|
|
|
return (zip_int16_t)n;
|
|
}
|
|
|
|
|
|
ZIP_EXTERN zip_int16_t
|
|
zip_file_extra_fields_count_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
zip_extra_field_t *ef;
|
|
zip_uint16_t n;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL)
|
|
return -1;
|
|
|
|
if (flags & ZIP_FL_LOCAL)
|
|
if (_zip_read_local_ef(za, idx) < 0)
|
|
return -1;
|
|
|
|
n = 0;
|
|
for (ef = de->extra_fields; ef; ef = ef->next)
|
|
if (ef->id == ef_id && (ef->flags & flags & ZIP_EF_BOTH))
|
|
n++;
|
|
|
|
return (zip_int16_t)n;
|
|
}
|
|
|
|
|
|
ZIP_EXTERN int
|
|
zip_file_extra_field_set(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, const zip_uint8_t *data, zip_uint16_t len, zip_flags_t flags) {
|
|
zip_dirent_t *de;
|
|
zip_uint16_t ls, cs;
|
|
zip_extra_field_t *ef, *ef_prev, *ef_new;
|
|
int i, found, new_len;
|
|
|
|
if ((flags & ZIP_EF_BOTH) == 0) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
|
|
return -1;
|
|
|
|
if (ZIP_IS_RDONLY(za)) {
|
|
zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (ZIP_EF_IS_INTERNAL(ef_id)) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (_zip_file_extra_field_prepare_for_change(za, idx) < 0)
|
|
return -1;
|
|
|
|
de = za->entry[idx].changes;
|
|
|
|
ef = de->extra_fields;
|
|
ef_prev = NULL;
|
|
i = 0;
|
|
found = 0;
|
|
|
|
for (; ef; ef = ef->next) {
|
|
if (ef->id == ef_id && (ef->flags & flags & ZIP_EF_BOTH)) {
|
|
if (i == ef_idx) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
ef_prev = ef;
|
|
}
|
|
|
|
if (i < ef_idx && ef_idx != ZIP_EXTRA_FIELD_NEW) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (flags & ZIP_EF_LOCAL)
|
|
ls = _zip_ef_size(de->extra_fields, ZIP_EF_LOCAL);
|
|
else
|
|
ls = 0;
|
|
if (flags & ZIP_EF_CENTRAL)
|
|
cs = _zip_ef_size(de->extra_fields, ZIP_EF_CENTRAL);
|
|
else
|
|
cs = 0;
|
|
|
|
new_len = ls > cs ? ls : cs;
|
|
if (found)
|
|
new_len -= ef->size + 4;
|
|
new_len += len + 4;
|
|
|
|
if (new_len > ZIP_UINT16_MAX) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
if ((ef_new = _zip_ef_new(ef_id, len, data, flags)) == NULL) {
|
|
zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
|
|
return -1;
|
|
}
|
|
|
|
if (found) {
|
|
if ((ef->flags & ZIP_EF_BOTH) == (flags & ZIP_EF_BOTH)) {
|
|
ef_new->next = ef->next;
|
|
ef->next = NULL;
|
|
_zip_ef_free(ef);
|
|
if (ef_prev)
|
|
ef_prev->next = ef_new;
|
|
else
|
|
de->extra_fields = ef_new;
|
|
}
|
|
else {
|
|
ef->flags &= ~(flags & ZIP_EF_BOTH);
|
|
ef_new->next = ef->next;
|
|
ef->next = ef_new;
|
|
}
|
|
}
|
|
else if (ef_prev) {
|
|
ef_new->next = ef_prev->next;
|
|
ef_prev->next = ef_new;
|
|
}
|
|
else
|
|
de->extra_fields = ef_new;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
_zip_file_extra_field_prepare_for_change(zip_t *za, zip_uint64_t idx) {
|
|
zip_entry_t *e;
|
|
|
|
if (idx >= za->nentry) {
|
|
zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
|
return -1;
|
|
}
|
|
|
|
e = za->entry + idx;
|
|
|
|
if (e->changes && (e->changes->changed & ZIP_DIRENT_EXTRA_FIELD))
|
|
return 0;
|
|
|
|
if (e->orig) {
|
|
if (_zip_read_local_ef(za, idx) < 0)
|
|
return -1;
|
|
}
|
|
|
|
if (e->changes == NULL) {
|
|
if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) {
|
|
zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (e->orig && e->orig->extra_fields) {
|
|
if ((e->changes->extra_fields = _zip_ef_clone(e->orig->extra_fields, &za->error)) == NULL)
|
|
return -1;
|
|
}
|
|
e->changes->changed |= ZIP_DIRENT_EXTRA_FIELD;
|
|
|
|
return 0;
|
|
}
|