wasi: new struct for wasi

Author: Afirium

src/wasi.zig

@@ -0,0 +1,60 @@
+pub const wasm = @import("./wasm.zig");
+
+pub const WasiConfig = opaque {
+    /// Options to inherit when inherriting configs
+    /// By default all is `true` as you often want to
+    /// inherit everything rather than something specifically.
+    const InheritOptions = struct {
+        argv: bool = true,
+        env: bool = true,
+        std_in: bool = true,
+        std_out: bool = true,
+        std_err: bool = true,
+    };
+
+    pub fn init() !*WasiConfig {
+        return wasi_config_new() orelse error.ConfigInit;
+    }
+
+    pub fn deinit(self: *WasiConfig) void {
+        wasi_config_delete(self);
+    }
+
+    /// Allows to inherit the native environment into the current config.
+    /// Inherits everything by default.
+    pub fn inherit(self: *WasiConfig, options: InheritOptions) void {
+        if (options.argv) self.inheritArgv();
+        if (options.env) self.inheritEnv();
+        if (options.std_in) self.inheritStdIn();
+        if (options.std_out) self.inheritStdOut();
+        if (options.std_err) self.inheritStdErr();
+    }
+
+    pub fn inheritArgv(self: *WasiConfig) void {
+        wasi_config_inherit_argv(self);
+    }
+
+    pub fn inheritEnv(self: *WasiConfig) void {
+        wasi_config_inherit_env(self);
+    }
+
+    pub fn inheritStdIn(self: *WasiConfig) void {
+        wasi_config_inherit_stdin(self);
+    }
+
+    pub fn inheritStdOut(self: *WasiConfig) void {
+        wasi_config_inherit_stdout(self);
+    }
+
+    pub fn inheritStdErr(self: *WasiConfig) void {
+        wasi_config_inherit_stderr(self);
+    }
+
+    extern "c" fn wasi_config_new() ?*WasiConfig;
+    extern "c" fn wasi_config_delete(?*WasiConfig) void;
+    extern "c" fn wasi_config_inherit_argv(?*WasiConfig) void;
+    extern "c" fn wasi_config_inherit_env(?*WasiConfig) void;
+    extern "c" fn wasi_config_inherit_stdin(?*WasiConfig) void;
+    extern "c" fn wasi_config_inherit_stdout(?*WasiConfig) void;
+    extern "c" fn wasi_config_inherit_stderr(?*WasiConfig) void;
+};