compiler: add support for $if x32, x64, big_endian, little_endian

vlib/runtime/runtime.v

@@ -4,8 +4,6 @@
 
 module runtime
 
-import os
-
 //$if linux {
 fn C.sysconf(name int) i64
 //}
@@ -15,18 +13,32 @@ fn C.GetCurrentProcessorNumber() u32
 //}
 
 pub fn nr_cpus() int {
-	$if linux {
-		return int(C.sysconf(C._SC_NPROCESSORS_ONLN))
-	}
-	$if mac {
-		return int(C.sysconf(C._SC_NPROCESSORS_ONLN))
-	}
 	$if windows {
-		mut nr := int(C.GetCurrentProcessorNumber())
-		if nr == 0 {
-			nr = os.getenv('NUMBER_OF_PROCESSORS').int()
-		}
-		return nr
+		return nr_cpus_win()
 	}
-	return 1
+	return nr_cpus_nix()
+}
+
+pub fn is_32bit() bool {
+	mut x := false
+	$if x32 { x = true }
+	return x
+}
+
+pub fn is_64bit() bool {
+	mut x := false
+	$if x64 { x = true }
+	return x
+}
+
+pub fn is_little_endian() bool {
+	mut x := false
+	$if little_endian { x = true }
+	return x
+}
+
+pub fn is_big_endian() bool {
+	mut x := false
+	$if big_endian { x = true }
+	return x
 }

vlib/runtime/runtime_nix.v

@@ -0,0 +1,16 @@
+module runtime
+
+fn nr_cpus_nix() int {
+	$if linux {
+		return int(C.sysconf(C._SC_NPROCESSORS_ONLN))
+	}
+	$if mac {
+		return int(C.sysconf(C._SC_NPROCESSORS_ONLN))
+	}
+	return 1
+}
+
+fn nr_cpus_win() int {
+	eprintln('nr_cpus_win should be callable only for windows')
+	return 1
+}

vlib/runtime/runtime_test.v

@@ -4,3 +4,31 @@ fn test_nr_cpus() {
 	nr_cpus := runtime.nr_cpus()
 	assert nr_cpus > 0
 }
+
+fn test_is_32bit(){
+	x := runtime.is_32bit().str()
+	assert x == 'true' || x == 'false'
+}
+
+fn test_is_64bit(){
+	x := runtime.is_64bit().str()
+	assert x == 'true' || x == 'false'
+}
+
+fn test_is_little_endian(){
+	x := runtime.is_little_endian().str()
+	assert x == 'true' || x == 'false'
+}
+
+fn test_is_big_endian(){
+	x := runtime.is_big_endian().str()
+	assert x == 'true' || x == 'false'
+}
+
+fn test_is_big_endian_different_than_is_little_endian(){
+	assert runtime.is_big_endian() != runtime.is_little_endian()
+}
+
+fn test_is_32bit_different_than_is_64bit(){	
+	assert runtime.is_32bit() != runtime.is_64bit()
+}

vlib/runtime/runtime_win.v

@@ -1 +1,16 @@
 module runtime
+
+import os
+
+fn nr_cpus_win() int {
+	mut nr := int(C.GetCurrentProcessorNumber())
+	if nr == 0 {
+		nr = os.getenv('NUMBER_OF_PROCESSORS').int()
+	}
+	return nr
+}
+
+fn nr_cpus_nix() int {
+	eprintln('nr_cpus_nix should be callable only for nix platforms')
+	return 1
+}