From acf9238af56b7876048ba1178aa1b0f3949e3ffc Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Sat, 4 Mar 2023 22:58:17 -0500
Subject: quick and dirty implementation

---
 plaintext.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 plaintext.c

(limited to 'plaintext.c')

diff --git a/plaintext.c b/plaintext.c
new file mode 100644
index 0000000..a107317
--- /dev/null
+++ b/plaintext.c
@@ -0,0 +1,59 @@
+#define _POSIX_C_SOURCE 2
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static int plaintext(const char *path)
+{
+	FILE *f = stdin;
+	if (path && strcmp(path, "-") != 0) {
+		f = fopen(path, "rb");
+		if (f == NULL) {
+			perror(path);
+			return 1;
+		}
+	}
+
+	int c = 0;
+	while ((c = fgetc(f)) != EOF) {
+		if (c == '\033') {
+			c = fgetc(f);	/* read '[' */
+			c = '\033';
+			while (c != EOF && ! (0x40 <= c && c <= 0x7e)) {
+				c = fgetc(f);
+			}
+			continue;
+		}
+		if (iscntrl(c) && !isspace(c)) {
+			continue;
+		}
+		putchar(c);
+	}
+
+	if (f != stdin) {
+		fclose(f);
+	}
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int c;
+	while ((c = getopt(argc, argv, "")) != -1) {
+		switch (c) {
+		default:
+			return 1;
+		}
+	}
+
+	if (optind >= argc) {
+		return plaintext(NULL);
+	}
+
+	int r = 0;
+	for (int i = optind; i < argc; i++) {
+		r |= plaintext(argv[i]);
+	}
+	return r;
+}
-- 
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