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Move the `Process` type out of the prelude and into its own module which contains top-level exported functions rather than having them live as static methods on a `Process` type (this was always weird).
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,14 +1,15 @@ | ||
| // This file is run with arguments passed to it, and environment variables present | ||
| import "process" as process | ||
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| val args = Process.args() | ||
| val args = process.args() | ||
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| /// Expect: [-f, bar, --baz, qux] | ||
| println(args[1:]) | ||
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| val bogusEnvVar = Process.getEnvVar("BOGUS") | ||
| val bogusEnvVar = process.getEnvVar("BOGUS") | ||
| /// Expect: Option.None | ||
| println(bogusEnvVar) | ||
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| val fooEnvVar = Process.getEnvVar("FOO") | ||
| val fooEnvVar = process.getEnvVar("FOO") | ||
| /// Expect: Option.Some(value: "bar") | ||
| println(fooEnvVar) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| import "./_intrinsics" as intrinsics | ||
| import Pointer, Byte from "./_intrinsics" | ||
| import "libc" as libc | ||
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| export type Uname { | ||
| sysname: String | ||
| nodename: String | ||
| release: String | ||
| version: String | ||
| machine: String | ||
| } | ||
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| var _args: String[]? = None | ||
| export func args(): String[] { | ||
| if _args |args| return args | ||
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| val argc = intrinsics.argc() | ||
| val argv = intrinsics.argv() | ||
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| val args: String[] = Array.withCapacity(argc) | ||
| for i in range(0, argc) { | ||
| val str = argv.offset(i).load() | ||
| val len = libc.strlen(str) | ||
| args.push(String(length: len, _buffer: str)) | ||
| } | ||
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| _args = Some(args) | ||
| args | ||
| } | ||
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| export func getEnvVar(name: String): String? { | ||
| val str = libc.getenv(name._buffer) | ||
| if str.isNullPtr() return None | ||
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| val len = libc.strlen(str) | ||
| Some(String(length: len, _buffer: str)) | ||
| } | ||
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| var _uname: Uname? = None | ||
| export func uname(): Uname { | ||
| if _uname |uname| return uname | ||
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| // On macOS, each field in the utsname struct is a char[256]; on other platforms it's different, so | ||
| // this can be wasteful of memory. | ||
| var utsnameBuf = Pointer.malloc<Byte>(256 * 5) | ||
| val res = libc.uname(utsnameBuf) | ||
| if res != 0 { /* todo: handle error code */ } | ||
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| val sysnameLen = libc.strlen(utsnameBuf) | ||
| val sysname = String.withLength(sysnameLen) | ||
| sysname._buffer.copyFrom(utsnameBuf, sysnameLen) | ||
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| // The utsname struct has 5 fields (6 on some platforms), of constant and equal sizes, but the size of | ||
| // each field differs per platform. After extracting the first string, skip over the \0 bytes until we | ||
| // reach the start of the next string. From that offset, we can determine the size of each field, and | ||
| // extract the remaining fields more efficiently. | ||
| var offset = sysnameLen | ||
| utsnameBuf = utsnameBuf.offset(offset) | ||
| while utsnameBuf.load().asInt() == 0 { | ||
| utsnameBuf = utsnameBuf.offset(1) | ||
| offset += 1 | ||
| } | ||
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| val nodenameLen = libc.strlen(utsnameBuf) | ||
| val nodename = String.withLength(nodenameLen) | ||
| nodename._buffer.copyFrom(utsnameBuf, nodenameLen) | ||
| utsnameBuf = utsnameBuf.offset(offset) | ||
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| val releaseLen = libc.strlen(utsnameBuf) | ||
| val release = String.withLength(releaseLen) | ||
| release._buffer.copyFrom(utsnameBuf, releaseLen) | ||
| utsnameBuf = utsnameBuf.offset(offset) | ||
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| val versionLen = libc.strlen(utsnameBuf) | ||
| val version = String.withLength(versionLen) | ||
| version._buffer.copyFrom(utsnameBuf, versionLen) | ||
| utsnameBuf = utsnameBuf.offset(offset) | ||
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| val machineLen = libc.strlen(utsnameBuf) | ||
| val machine = String.withLength(machineLen) | ||
| machine._buffer.copyFrom(utsnameBuf, machineLen) | ||
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| val uname = Uname(sysname: sysname, nodename: nodename, release: release, version: version, machine: machine) | ||
| _uname = Some(uname) | ||
| uname | ||
| } | ||
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| @noreturn | ||
| export func exit(status = 1) = libc.exit(status) |