strwidth: Initial commit

gen/strwidth.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include "fonts.h"
+
+static inline char convert(char c) {
+	if (c < 0x80) {
+		return c;
+	} else if (c >= 0xC0) {
+		return '_';
+	} else {
+		return '\0';
+	}
+}
+
+int main(int argc, char **argv) {
+	char *line;
+	while ((line = readline(NULL)) != NULL) {
+		size_t length = strlen(line);
+		if (length) {
+			add_history(line);
+		}
+
+		size_t width = 0;
+		for (size_t i = 0; i < length; i++) {
+			width += fontCharWidth(convert(line[i])) + 1;
+		}
+
+		printf("%zu\n", width);
+		free(line);
+	}
+}