1 files changed, 115 insertions, 0 deletions
diff --git a/vendor/windows-sys-0.42.0/src/core/literals.rs b/vendor/windows-sys-0.42.0/src/core/literals.rs
new file mode 100644
index 000000000..a8b3a2f6f
--- /dev/null
+++ b/vendor/windows-sys-0.42.0/src/core/literals.rs
@@ -0,0 +1,115 @@
+/// A literal UTF-8 string with a trailing null terminator.
+#[macro_export]
+macro_rules! s {
+    ($s:literal) => {
+        ::core::concat!($s, '\0').as_ptr()
+    };
+}
+
+/// A literal UTF-16 wide string with a trailing null terminator.
+#[macro_export]
+macro_rules! w {
+    ($s:literal) => {{
+        const INPUT: &[u8] = $s.as_bytes();
+        const OUTPUT_LEN: usize = $crate::core::utf16_len(INPUT) + 1;
+        const OUTPUT: &[u16; OUTPUT_LEN] = {
+            let mut buffer = [0; OUTPUT_LEN];
+            let mut input_pos = 0;
+            let mut output_pos = 0;
+            while let Some((mut code_point, new_pos)) = $crate::core::decode_utf8_char(INPUT, input_pos) {
+                input_pos = new_pos;
+                if code_point <= 0xffff {
+                    buffer[output_pos] = code_point as u16;
+                    output_pos += 1;
+                } else {
+                    code_point -= 0x10000;
+                    buffer[output_pos] = 0xd800 + (code_point >> 10) as u16;
+                    output_pos += 1;
+                    buffer[output_pos] = 0xdc00 + (code_point & 0x3ff) as u16;
+                    output_pos += 1;
+                }
+            }
+            &{ buffer }
+        };
+        OUTPUT.as_ptr()
+    }};
+}
+
+// Ensures that the macros are exported from the `windows::core` module.
+pub use s;
+pub use w;
+
+#[doc(hidden)]
+pub const fn decode_utf8_char(bytes: &[u8], mut pos: usize) -> Option<(u32, usize)> {
+    if bytes.len() == pos {
+        return None;
+    }
+    let ch = bytes[pos] as u32;
+    pos += 1;
+    if ch <= 0x7f {
+        return Some((ch, pos));
+    }
+    if (ch & 0xe0) == 0xc0 {
+        if bytes.len() - pos < 1 {
+            return None;
+        }
+        let ch2 = bytes[pos] as u32;
+        pos += 1;
+        if (ch2 & 0xc0) != 0x80 {
+            return None;
+        }
+        let result: u32 = ((ch & 0x1f) << 6) | (ch2 & 0x3f);
+        if result <= 0x7f {
+            return None;
+        }
+        return Some((result, pos));
+    }
+    if (ch & 0xf0) == 0xe0 {
+        if bytes.len() - pos < 2 {
+            return None;
+        }
+        let ch2 = bytes[pos] as u32;
+        pos += 1;
+        let ch3 = bytes[pos] as u32;
+        pos += 1;
+        if (ch2 & 0xc0) != 0x80 || (ch3 & 0xc0) != 0x80 {
+            return None;
+        }
+        let result = ((ch & 0x0f) << 12) | ((ch2 & 0x3f) << 6) | (ch3 & 0x3f);
+        if result <= 0x7ff || (0xd800 <= result && result <= 0xdfff) {
+            return None;
+        }
+        return Some((result, pos));
+    }
+    if (ch & 0xf8) == 0xf0 {
+        if bytes.len() - pos < 3 {
+            return None;
+        }
+        let ch2 = bytes[pos] as u32;
+        pos += 1;
+        let ch3 = bytes[pos] as u32;
+        pos += 1;
+        let ch4 = bytes[pos] as u32;
+        pos += 1;
+        if (ch2 & 0xc0) != 0x80 || (ch3 & 0xc0) != 0x80 || (ch4 & 0xc0) != 0x80 {
+            return None;
+        }
+        let result = ((ch & 0x07) << 18) | ((ch2 & 0x3f) << 12) | ((ch3 & 0x3f) << 6) | (ch4 & 0x3f);
+        if result <= 0xffff || 0x10ffff < result {
+            return None;
+        }
+        return Some((result, pos));
+    }
+    None
+}
+
+#[doc(hidden)]
+pub const fn utf16_len(bytes: &[u8]) -> usize {
+    let mut pos = 0;
+    let mut len = 0;
+    while let Some((code_point, new_pos)) = decode_utf8_char(bytes, pos) {
+        pos = new_pos;
+        len += if code_point <= 0xffff { 1 } else { 2 };
+    }
+    len
+}