1 files changed, 34 insertions, 0 deletions
diff --git a/bin/u8 b/bin/u8
new file mode 100755
index 0000000..c022900
--- /dev/null
+++ b/bin/u8
@@ -0,0 +1,34 @@
+#!/bin/sh -euf
+#
+# Convert input to 32bit hex encoded utf8.
+#
+# Copyright (c) 2026 Dylan Araps
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+
+LC_ALL=C
+a=$1 b=${a#?} c=${b#?} d=${c#?}
+a=${a%"$b"} b=${b%"$c"} c=${c%"$d"} d=${d%"${1#????}"}
+export $(printf 'a=%d b=%d c=%d d=%d' "'$a" "'$b" "'$c" "'$d")
+printf '0x%08X\n' "$((a < 128 ? a : a < 224 ?
+(a & 0x1F) <<  6 | (b & 0x3F) : a < 240 ?
+(a & 0x0F) << 12 | (b & 0x3F) <<  6 | (c & 0x3F) :
+(a & 0x07) << 18 | (b & 0x3F) << 12 | (c & 0x3F) << 6 | (d & 0x3f)))"
+