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

---
 .gitignore  |  2 ++
 LICENSE     |  2 +-
 Makefile    | 34 ++++++++++++++++++++++++++++++++++
 README.md   |  4 +++-
 plaintext.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 99 insertions(+), 2 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 plaintext.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..84f5558
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+plaintext
diff --git a/LICENSE b/LICENSE
index 46722ef..6dd526f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Jakob Kaivo
+Copyright (c) 2023 Jakob Kaivo
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b541a2b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,34 @@
+.POSIX:
+
+# This Makefile was generated by maje
+# See https://src.kaivo.net/dev/maje/ for more information
+# Do not edit this Makefile by hand
+
+CC=c99
+LD=$(CC)
+CFLAGS=-Wall -Wextra -Wpedantic -Werror -g
+LDFLAGS=
+LDLIBS=
+SRCDIR=.
+OBJDIR=.
+BINDIR=$(OBJDIR)
+LIBDIR=$(OBJDIR)
+DESTDIR=/usr/local
+
+all: $(BINDIR)/plaintext
+
+clean:
+	rm -f $(BINDIR)/plaintext $(OBJDIR)/*.o
+
+install: $(BINDIR)/plaintext
+	mkdir -p $(DESTDIR)/bin
+	cp $(BINDIR)/plaintext $(DESTDIR)/bin
+
+$(BINDIR)/plaintext: $(OBJDIR)/plaintext.o
+$(OBJDIR)/plaintext.o: $(SRCDIR)/plaintext.c
+	@mkdir -p $(@D)
+	$(CC) $(CFLAGS) -o $@ -c $(SRCDIR)/plaintext.c
+
+$(BINDIR)/plaintext:
+	@mkdir -p $(@D)
+	$(LD) $(LDFLAGS) -o $@ $(OBJDIR)/*.o $(LDLIBS)
diff --git a/README.md b/README.md
index 9b40b88..64a7208 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-Inspired by https://no-color.org/
\ No newline at end of file
+Strips control characters and ECMA-48 escape sequences from text.
+
+Inspired by https://no-color.org/
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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