nix_utf8_aesthetic

commit 2cc7e3ddb26f33b35c747c95bc191a08183bd844
Author: David DiPaola <DavidDiPaola@users.noreply.github.com>
Date:   Sun, 16 Dec 2018 19:40:57 -0500

initial commit

Diffstat:
A
.gitignore
 | 
2
++
A
Makefile
 | 
12
++++++++++++
A
main.c
 | 
33
+++++++++++++++++++++++++++++++++

3 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,2 @@
+text_aesthetic
+
diff --git a/Makefile b/Makefile
@@ -0,0 +1,12 @@
+BIN = text_aesthetic
+
+.PHONY: all
+all: $(BIN)
+
+$(BIN): main.c
+	$(CC) $(CFLAGS) $< -o $@
+
+.PHONY: clean
+clean:
+	rm -rf $(BIN)
+
diff --git a/main.c b/main.c
@@ -0,0 +1,33 @@
+#include <unistd.h>
+
+int
+main() {
+	char ch;
+	while (read(STDIN_FILENO, &ch, sizeof(ch)) == sizeof(ch)) {
+		if (ch == 0x20) {
+			/* write codepoint 0x3000 */
+			char utf8[] = {
+				0b11100000 |   0b0011,
+				0b10000000 | 0b000000,
+				0b10000000 | 0b000000,
+			};
+			write(STDOUT_FILENO, utf8, sizeof(utf8));
+		}
+		else if ((ch >= 0x21) && (ch <= 0x7E)) {
+			/* write codepoints 0xFF01-0xFF5E */
+			char offset = ch - 0x20;
+			char utf8[] = {
+				0b11100000 |                        0b1111,
+				0b10000000 | (0b1111 << 2) | (offset >> 6),
+				0b10000000 |           (offset & 0b111111),
+			};
+			write(STDOUT_FILENO, utf8, sizeof(utf8));
+		}
+		else {
+			write(STDOUT_FILENO, &ch, sizeof(ch));
+		}
+	}
+
+	return 0;
+}
+