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v/vlib/szip/szip.v
2022-05-11 16:48:41 +03:00

316 lines
8.3 KiB
V

module szip
import os
#flag -I @VEXEROOT/thirdparty/zip
#include "zip.c"
[params]
pub struct ZipFolderOptions {
omit_empty_folders bool
}
struct C.zip_t {
}
type Zip = C.zip_t
pub type Fn_on_extract_entry = fn (&&char, &&char) int
fn C.zip_open(&char, int, char) &Zip
fn C.zip_close(&Zip)
fn C.zip_entry_open(&Zip, &u8) int
fn C.zip_entry_openbyindex(&Zip, usize) int
fn C.zip_entry_close(&Zip) int
fn C.zip_entry_name(&Zip) &u8
fn C.zip_entry_index(&Zip) int
fn C.zip_entry_isdir(&Zip) int
fn C.zip_entry_size(&Zip) u64
fn C.zip_entry_crc32(&Zip) u32
fn C.zip_entry_write(&Zip, voidptr, usize) int
fn C.zip_entry_fwrite(&Zip, &char) int
fn C.zip_entry_read(&Zip, &voidptr, &usize) int
fn C.zip_entry_noallocread(&Zip, voidptr, usize) int
fn C.zip_entry_fread(&Zip, &char) int
fn C.zip_entries_total(&Zip) int
fn C.zip_extract(&char, &char, Fn_on_extract_entry, voidptr) int
fn cb_zip_extract(filename &&char, arg &&char) int {
return 0
}
// CompressionLevel lists compression levels, see in "thirdparty/zip/miniz.h"
pub enum CompressionLevel {
no_compression = 0
best_speed = 1
best_compression = 9
uber_compression = 10
default_level = 6
default_compression = -1
}
// OpenMode lists the opening modes
// .write: opens a file for reading/extracting (the file must exists).
// .read_only: creates an empty file for writing.
// .append: appends to an existing archive.
pub enum OpenMode {
write
read_only
append
}
[inline]
fn (om OpenMode) to_u8() u8 {
return match om {
.write {
`w`
}
.read_only {
`r`
}
.append {
`a`
}
}
}
// open opens zip archive with compression level using the given mode.
// name: the name of the zip file to open.
// level: can be any value of the CompressionLevel enum.
// mode: can be any value of the OpenMode enum.
pub fn open(name string, level CompressionLevel, mode OpenMode) ?&Zip {
if name.len == 0 {
return error('szip: name of file empty')
}
p_zip := unsafe { &Zip(C.zip_open(&char(name.str), int(level), char(mode.to_u8()))) }
if isnil(p_zip) {
return error('szip: cannot open/create/append new zip archive')
}
return p_zip
}
// close closes the zip archive, releases resources - always finalize.
[inline]
pub fn (mut z Zip) close() {
C.zip_close(z)
}
// open_entry opens an entry by name in the zip archive.
// For zip archive opened in 'w' or 'a' mode the function will append
// a new entry. In readonly mode the function tries to locate the entry
// in global dictionary.
pub fn (mut zentry Zip) open_entry(name string) ? {
res := C.zip_entry_open(zentry, &char(name.str))
if res == -1 {
return error('szip: cannot open archive entry')
}
}
// open_entry_by_index opens an entry by index in the archive.
pub fn (mut z Zip) open_entry_by_index(index int) ? {
res := C.zip_entry_openbyindex(z, index)
if res == -1 {
return error('szip: cannot open archive entry at index $index')
}
}
// close_entry closes a zip entry, flushes buffer and releases resources.
[inline]
pub fn (mut zentry Zip) close_entry() {
C.zip_entry_close(zentry)
}
// name returns a local name of the current zip entry.
// The main difference between user's entry name and local entry name
// is optional relative path.
// Following .ZIP File Format Specification - the path stored MUST not contain
// a drive or device letter, or a leading slash.
// All slashes MUST be forward slashes '/' as opposed to backwards slashes '\'
// for compatibility with Amiga and UNIX file systems etc.
pub fn (mut zentry Zip) name() string {
name := unsafe { &u8(C.zip_entry_name(zentry)) }
if name == 0 {
return ''
}
return unsafe { name.vstring() }
}
// index returns an index of the current zip entry.
pub fn (mut zentry Zip) index() ?int {
index := int(C.zip_entry_index(zentry))
if index == -1 {
return error('szip: cannot get current index of zip entry')
}
return index // must be check for INVALID_VALUE
}
// is_dir determines if the current zip entry is a directory entry.
pub fn (mut zentry Zip) is_dir() ?bool {
isdir := C.zip_entry_isdir(zentry)
if isdir < 0 {
return error('szip: cannot check entry type')
}
return isdir == 1
}
// size returns an uncompressed size of the current zip entry.
[inline]
pub fn (mut zentry Zip) size() u64 {
return C.zip_entry_size(zentry)
}
// crc32 returns CRC-32 checksum of the current zip entry.
[inline]
pub fn (mut zentry Zip) crc32() u32 {
return C.zip_entry_crc32(zentry)
}
// write_entry compresses an input buffer for the current zip entry.
pub fn (mut zentry Zip) write_entry(data []u8) ? {
if int(data[0] & 0xff) == -1 {
return error('szip: cannot write entry')
}
res := C.zip_entry_write(zentry, data.data, data.len)
if res != 0 {
return error('szip: failed to write entry')
}
}
// create_entry compresses a file for the current zip entry.
pub fn (mut zentry Zip) create_entry(name string) ? {
res := C.zip_entry_fwrite(zentry, &char(name.str))
if res != 0 {
return error('szip: failed to create entry')
}
}
// read_entry extracts the current zip entry into output buffer.
// The function allocates sufficient memory for an output buffer.
// NOTE: remember to release the memory allocated for an output buffer.
// for large entries, please take a look at zip_entry_extract function.
pub fn (mut zentry Zip) read_entry() ?voidptr {
mut buf := &u8(0)
mut bsize := usize(0)
res := C.zip_entry_read(zentry, unsafe { &voidptr(&buf) }, &bsize)
if res == -1 {
return error('szip: cannot read properly data from entry')
}
return buf
}
// read_entry_buf extracts the current zip entry into user specified buffer
pub fn (mut zentry Zip) read_entry_buf(buf voidptr, in_bsize int) ?int {
bsize := usize(in_bsize)
res := C.zip_entry_noallocread(zentry, buf, bsize)
if res == -1 {
return error('szip: cannot read properly data from entry')
}
return res
}
// extract_entry extracts the current zip entry into output file.
pub fn (mut zentry Zip) extract_entry(path string) ? {
res := C.zip_entry_fread(zentry, &char(path.str))
if res != 0 {
return error('szip: failed to extract entry')
}
}
// extract zip file to directory
pub fn extract_zip_to_dir(file string, dir string) ?bool {
if C.access(&char(dir.str), 0) == -1 {
return error('szip: cannot open directory for extracting, directory not exists')
}
res := C.zip_extract(&char(file.str), &char(dir.str), cb_zip_extract, 0)
return res == 0
}
// zip files (full path) to zip file
pub fn zip_files(path_to_file []string, path_to_export_zip string) ? {
// open or create new zip
mut zip := open(path_to_export_zip, .no_compression, .write) or { panic(err) }
// add all files from the directory to the archive
for file in path_to_file {
// add file to zip
zip.open_entry(os.base(file)) or { panic(err) }
file_as_byte := os.read_bytes(file) or { panic(err) }
zip.write_entry(file_as_byte) or { panic(err) }
zip.close_entry()
}
// close zip
defer {
zip.close()
}
}
// zip_folder zips all entries in `folder` *recursively* to the zip file at `zip_file`.
// Empty folders will be included, unless specified otherwise in `opt`.
pub fn zip_folder(folder string, zip_file string, opt ZipFolderOptions) ? {
// get list of files from directory
path := folder.trim_right(os.path_separator)
mut files := []string{}
os.walk_with_context(path, &files, fn (mut files []string, file string) {
files << file
})
// open or create new zip
mut zip := open(zip_file, .no_compression, .write) ?
// close zip
defer {
zip.close()
}
// add all files from the directory to the archive
for file in files {
is_dir := os.is_dir(file)
if opt.omit_empty_folders && is_dir {
continue
}
// strip each zip entry for the path prefix - this way
// all files in the archive can be made relative.
mut zip_file_entry := file.trim_string_left(path + os.path_separator)
// Normalize path on Windows \ -> /
$if windows {
zip_file_entry = zip_file_entry.replace(os.path_separator, '/')
}
if is_dir {
zip_file_entry += '/' // Tells the implementation that the entry is a directory
}
// add file or directory (ends with "/") to zip
zip.open_entry(zip_file_entry) ?
if !is_dir {
file_as_byte := os.read_bytes(file) ?
zip.write_entry(file_as_byte) ?
}
zip.close_entry()
}
}
// total returns the number of all entries (files and directories) in the zip archive.
pub fn (mut zentry Zip) total() ?int {
tentry := int(C.zip_entries_total(zentry))
if tentry == -1 {
return error('szip: cannot count total entries')
}
return tentry
}