Moved archive C bindings into separate file

main
Jef Roosens 2022-01-13 12:46:36 +01:00
parent f49992d452
commit 44ddd57f55
Signed by untrusted user: Jef Roosens
GPG Key ID: 955C0660072F691F
3 changed files with 89 additions and 87 deletions

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@ -1,87 +0,0 @@
module archive
import os
#flag -larchive
#include "archive.h"
#include "archive_entry.h"
#include <string.h>
struct C.archive {}
struct C.archive_entry {}
// Create a new archive struct
fn C.archive_read_new() &C.archive
fn C.archive_entry_new() &C.archive_entry
fn C.archive_read_support_filter_all(&C.archive)
fn C.archive_read_support_format_all(&C.archive)
// Open an archive for reading
fn C.archive_read_open_filename(&C.archive, &char, int) int
fn C.archive_read_next_header(&C.archive, &&C.archive_entry) int
fn C.archive_read_next_header2(&C.archive, &C.archive_entry) int
fn C.archive_entry_pathname(&C.archive_entry) &char
fn C.archive_read_data_skip(&C.archive)
fn C.archive_read_free(&C.archive) int
fn C.archive_read_data(&C.archive, voidptr, int)
fn C.archive_entry_size(&C.archive_entry) int
fn C.strcmp(&char, &char) int
// pub fn list_filenames() {
// a := C.archive_read_new()
// entry := &C.archive_entry{}
// mut r := 0
// C.archive_read_support_filter_all(a)
// C.archive_read_support_format_all(a)
// r = C.archive_read_open_filename(a, c'test/homebank-5.5.1-1-x86_64.pkg.tar.zst', 10240)
// for (C.archive_read_next_header(a, &entry) == C.ARCHIVE_OK) {
// println(cstring_to_vstring(C.archive_entry_pathname(entry)))
// C.archive_read_data_skip(a) // Note 2
// }
// r = C.archive_read_free(a) // Note 3
// }
pub fn get_pkg_info(pkg_path string) ?string {
if !os.is_file(pkg_path) {
return error("'$pkg_path' doesn't exist or isn't a file.")
}
a := C.archive_read_new()
entry := C.archive_entry_new()
mut r := 0
C.archive_read_support_filter_all(a)
C.archive_read_support_format_all(a)
// TODO find out where does this 10240 come from
r = C.archive_read_open_filename(a, &char(pkg_path.str), 10240)
defer {
C.archive_read_free(a)
}
if r != C.ARCHIVE_OK {
return error('Failed to open package.')
}
// We iterate over every header in search of the .PKGINFO one
mut buf := voidptr(0)
for C.archive_read_next_header(a, &entry) == C.ARCHIVE_OK {
if C.strcmp(C.archive_entry_pathname(entry), c'.PKGINFO') == 0 {
size := C.archive_entry_size(entry)
// TODO can this unsafe block be avoided?
buf = unsafe { malloc(size) }
C.archive_read_data(a, voidptr(buf), size)
break
}else{
C.archive_read_data_skip(a)
}
}
return unsafe { cstring_to_vstring(&char(buf)) }
}

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@ -0,0 +1,43 @@
module archive
import os
pub fn get_pkg_info(pkg_path string) ?string {
if !os.is_file(pkg_path) {
return error("'$pkg_path' doesn't exist or isn't a file.")
}
a := C.archive_read_new()
entry := C.archive_entry_new()
mut r := 0
C.archive_read_support_filter_all(a)
C.archive_read_support_format_all(a)
// TODO find out where does this 10240 come from
r = C.archive_read_open_filename(a, &char(pkg_path.str), 10240)
defer {
C.archive_read_free(a)
}
if r != C.ARCHIVE_OK {
return error('Failed to open package.')
}
// We iterate over every header in search of the .PKGINFO one
mut buf := voidptr(0)
for C.archive_read_next_header(a, &entry) == C.ARCHIVE_OK {
if C.strcmp(C.archive_entry_pathname(entry), c'.PKGINFO') == 0 {
size := C.archive_entry_size(entry)
// TODO can this unsafe block be avoided?
buf = unsafe { malloc(size) }
C.archive_read_data(a, voidptr(buf), size)
break
} else {
C.archive_read_data_skip(a)
}
}
return unsafe { cstring_to_vstring(&char(buf)) }
}

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module archive
#flag -larchive
#include "archive.h"
struct C.archive {}
// Create a new archive struct
fn C.archive_read_new() &C.archive
fn C.archive_read_support_filter_all(&C.archive)
fn C.archive_read_support_format_all(&C.archive)
// Open an archive for reading
fn C.archive_read_open_filename(&C.archive, &char, int) int
// Go to next entry header in archive
fn C.archive_read_next_header(&C.archive, &&C.archive_entry) int
// Skip reading the current entry
fn C.archive_read_data_skip(&C.archive)
// Free an archive
fn C.archive_read_free(&C.archive) int
// Read an archive entry's contents into a pointer
fn C.archive_read_data(&C.archive, voidptr, int)
#include "archive_entry.h"
struct C.archive_entry {}
// Create a new archive_entry struct
fn C.archive_entry_new() &C.archive_entry
// Get the filename of the given entry
fn C.archive_entry_pathname(&C.archive_entry) &char
// Get an entry's file size
// Note: this function actually returns an i64, but as this can't be used as an arugment to malloc, we'll just roll with it & assume an entry is never bigger than 4 gigs
fn C.archive_entry_size(&C.archive_entry) int
#include <string.h>
// Compare two C strings; 0 means they're equal
fn C.strcmp(&char, &char) int