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111 lines
3.6 KiB
Odin
111 lines
3.6 KiB
Odin
package os
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import "base:runtime"
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@(private="file")
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MAX_ATTEMPTS :: 1<<13 // Should be enough for everyone, right?
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// Creates a new temperatory file in the directory `dir`.
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//
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// Opens the file for reading and writing, with `Permissions_Read_Write_All` permissions, and returns the new `^File`.
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// The filename is generated by taking a pattern, and adding a randomized string to the end.
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// If the pattern includes an "*", the random string replaces the last "*".
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// If `dir` is an empty string, `temp_directory()` will be used.
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//
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// The caller must `close` the file once finished with.
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@(require_results)
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create_temp_file :: proc(dir, pattern: string, additional_flags: File_Flags = {}) -> (f: ^File, err: Error) {
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temp_allocator := TEMP_ALLOCATOR_GUARD({})
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dir := dir if dir != "" else temp_directory(temp_allocator) or_return
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prefix, suffix := _prefix_and_suffix(pattern) or_return
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prefix = temp_join_path(dir, prefix, temp_allocator) or_return
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rand_buf: [10]byte
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name_buf := make([]byte, len(prefix)+len(rand_buf)+len(suffix), temp_allocator)
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attempts := 0
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for {
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name := concatenate_strings_from_buffer(name_buf[:], prefix, random_string(rand_buf[:]), suffix)
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f, err = open(name, {.Read, .Write, .Create, .Excl} + additional_flags, Permissions_Read_Write_All)
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if err == .Exist {
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close(f)
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attempts += 1
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if attempts < MAX_ATTEMPTS {
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continue
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}
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return nil, err
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}
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return f, err
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}
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}
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mkdir_temp :: make_directory_temp
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// Creates a new temporary directory in the directory `dir`, and returns the path of the new directory.
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//
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// The directory name is generated by taking a pattern, and adding a randomized string to the end.
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// If the pattern includes an "*", the random string replaces the last "*".
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// If `dir` is an empty tring, `temp_directory()` will be used.
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@(require_results)
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make_directory_temp :: proc(dir, pattern: string, allocator: runtime.Allocator) -> (temp_path: string, err: Error) {
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temp_allocator := TEMP_ALLOCATOR_GUARD({ allocator })
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dir := dir if dir != "" else temp_directory(temp_allocator) or_return
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prefix, suffix := _prefix_and_suffix(pattern) or_return
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prefix = temp_join_path(dir, prefix, temp_allocator) or_return
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rand_buf: [10]byte
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name_buf := make([]byte, len(prefix)+len(rand_buf)+len(suffix), temp_allocator)
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attempts := 0
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for {
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name := concatenate_strings_from_buffer(name_buf[:], prefix, random_string(rand_buf[:]), suffix)
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err = make_directory(name, 0o700)
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if err == nil {
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return clone_string(name, allocator)
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}
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if err == .Exist {
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attempts += 1
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if attempts < MAX_ATTEMPTS {
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continue
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}
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return "", err
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}
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if err == .Not_Exist {
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if _, serr := stat(dir, temp_allocator); serr == .Not_Exist {
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return "", serr
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}
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}
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return "", err
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}
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}
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temp_dir :: temp_directory
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/*
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Returns the default directory to use for temporary files.
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On Unix systems, it typically returns $TMPDIR if non-empty, otherwlse `/tmp`.
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On Windows, it uses `GetTempPathW`, returning the first non-empty value from one of the following:
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* `%TMP%`
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* `%TEMP%`
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* `%USERPROFILE %`
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* or the Windows directory
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See https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-gettemppathw for more information.
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On wasi, it returns `/tmp`.
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*/
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@(require_results)
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temp_directory :: proc(allocator: runtime.Allocator) -> (string, Error) {
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return _temp_dir(allocator)
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}
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@(private="file")
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temp_join_path :: proc(dir, name: string, allocator: runtime.Allocator) -> (string, runtime.Allocator_Error) {
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if len(dir) > 0 && is_path_separator(dir[len(dir)-1]) {
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return concatenate({dir, name}, allocator)
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}
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return concatenate({dir, Path_Separator_String, name}, allocator)
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}
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