Initial project import

tools/v/vlib/builtin/wasm_bare/libc_impl.c.v

@@ -0,0 +1,169 @@
+module builtin
+
+//__global global_allocator dlmalloc.Dlmalloc
+
+@[unsafe]
+pub fn __malloc(size usize) voidptr {
+	unsafe {
+		$if windows {
+			// Warning! On windows, we always use _aligned_malloc to allocate memory.
+			// This ensures that we can later free the memory with _aligned_free
+			// without needing to track whether the memory was originally allocated
+			// by malloc or _aligned_malloc.
+			return C._aligned_malloc(size, 1)
+		} $else {
+			return C.malloc(int(size))
+		}
+	}
+	return unsafe { nil }
+}
+
+@[unsafe]
+pub fn memcpy(dest &C.void, const_src &C.void, n usize) &C.void {
+	dest_ := unsafe { &u8(dest) }
+	src_ := unsafe { &u8(const_src) }
+	unsafe {
+		for i in 0 .. int(n) {
+			dest_[i] = src_[i]
+		}
+	}
+	return unsafe { dest }
+}
+
+@[unsafe]
+fn strlen(const_s &char) usize {
+	s := unsafe { &u8(const_s) }
+	mut i := 0
+	for ; unsafe { s[i] } != 0; i++ {}
+	return usize(i)
+}
+
+@[unsafe]
+fn realloc(old_area &C.void, new_size usize) &C.void {
+	if old_area == 0 {
+		return unsafe { malloc(int(new_size)) }
+	}
+	if new_size == usize(0) {
+		unsafe { free(old_area) }
+		return 0
+	}
+	old_size := unsafe { *(&u64(old_area - sizeof(u64))) }
+	if u64(new_size) <= old_size {
+		return unsafe { old_area }
+	} else {
+		new_area := unsafe { malloc(int(new_size)) }
+		unsafe { memmove(new_area, old_area, usize(old_size)) }
+		unsafe { free(old_area) }
+		return new_area
+	}
+}
+
+@[unsafe]
+fn memset(s &C.void, c int, n usize) &C.void {
+	mut s_ := unsafe { &char(s) }
+	for i in 0 .. int(n) {
+		unsafe {
+			s_[i] = char(c)
+		}
+	}
+	return unsafe { s }
+}
+
+@[unsafe]
+fn memmove(dest &C.void, const_src &C.void, n usize) &C.void {
+	dest_ := unsafe { &u8(dest) }
+	src_ := unsafe { &u8(const_src) }
+	mut temp_buf := unsafe { malloc(int(n)) }
+	for i in 0 .. int(n) {
+		unsafe {
+			temp_buf[i] = src_[i]
+		}
+	}
+
+	for i in 0 .. int(n) {
+		unsafe {
+			dest_[i] = temp_buf[i]
+		}
+	}
+	unsafe { free(temp_buf) }
+	return unsafe { dest }
+}
+
+@[export: 'calloc']
+@[unsafe]
+fn __calloc(nmemb usize, size usize) &C.void {
+	new_area := unsafe { malloc(int(nmemb) * int(size)) }
+	unsafe { memset(new_area, 0, nmemb * size) }
+	return new_area
+}
+
+fn getchar() int {
+	return 0
+}
+
+fn memcmp(const_a &C.void, const_b &C.void, n usize) int {
+	a_ := unsafe { &u8(const_a) }
+	b_ := unsafe { &u8(const_b) }
+	for i in 0 .. int(n) {
+		if unsafe { a_[i] != b_[i] } {
+			unsafe {
+				return a_[i] - b_[i]
+			}
+		}
+	}
+	return 0
+}
+
+fn vsprintf(str &char, format &char, ap &u8) int {
+	panic('vsprintf(): string interpolation is not supported in `-freestanding`')
+}
+
+fn vsnprintf(str &char, size usize, format &char, ap &u8) int {
+	panic('vsnprintf(): string interpolation is not supported in `-freestanding`')
+}
+
+enum Errno {
+	enoerror
+	eerror
+}
+
+// not really needed
+fn bare_read(buf &u8, count u64) (i64, Errno) {
+	return 0, Errno.eerror
+}
+
+pub fn bare_print(buf &u8, len u64) {
+}
+
+fn bare_eprint(buf &u8, len u64) {
+}
+
+pub fn write(_fd i64, _buf &u8, _count u64) i64 {
+	return -1
+}
+
+@[noreturn]
+fn bare_panic(msg string) {
+	println('V panic' + msg)
+	exit(1)
+}
+
+fn bare_backtrace() string {
+	return 'backtraces are not available with `-freestanding`'
+}
+
+@[export: 'exit']
+@[noreturn]
+fn __exit(code int) {
+	unsafe {
+		// the only way to abort process execution in WASM
+		mut x := &int(nil)
+		*x = code
+	}
+	for {}
+}
+
+@[export: 'qsort']
+fn __qsort(base voidptr, nmemb usize, size usize, sort_cb FnSortCB) {
+	panic('qsort() is not yet implemented in `-freestanding`')
+}

tools/v/vlib/builtin/wasm_bare/memory_management.v

@@ -0,0 +1,5 @@
+// malloc/free implementation for freestanding webassembly target. We just use walloc at the moment
+module builtin
+
+#flag -I @VEXEROOT/thirdparty/walloc/
+#include "walloc.c"