1 files changed, 92 insertions, 0 deletions
diff --git a/devtools/clean-c.c b/devtools/clean-c.c
new file mode 100644
index 0000000..2f56087
--- /dev/null
+++ b/devtools/clean-c.c
@@ -0,0 +1,92 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static char quote = 0;
+static char comment = 0;
+
+static size_t
+clean(char *text, size_t len)
+{
+	char *w = text;
+	size_t off;
+
+	for (off = 0; off < len; off++) {
+		if (comment == '/') {
+			if (text[off] == '\n')
+				comment = 0;
+		} else if (comment == '*') {
+			if (text[off] == '*' && off + 1 < len && text[off + 1] == '/') {
+				comment = 0;
+				off += 1;
+			}
+		} else {
+			*w++ = text[off];
+			switch (text[off]) {
+			case '\"':
+			case '\'':
+				quote = quote == text[off] ? 0 : text[off];
+				break;
+
+			case '\\':
+				if (off + 1 < len) {
+					off++;
+					w -= !!quote;
+					*w++ = text[off] == '\n' ? ' ' : text[off];
+				}
+				break;
+
+			case '/':
+				if (off + 1 < len) {
+					if (text[off + 1] == '*' || text[off + 1] == '/') {
+						comment = text[off++ + 1];
+						w[-1] = ' ';
+					}
+				}
+				break;
+
+			default:
+				break;
+			}
+		}
+	}
+
+	return (size_t)(w - text);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char buf[8 << 10];
+	size_t size, off;
+	ssize_t r;
+
+	(void) argc;
+
+	for (;;) {
+		r = read(STDIN_FILENO, buf, sizeof(buf));
+		if (r <= 0) {
+			if (!r)
+				break;
+			if (errno == EINTR)
+				continue;
+			perror(argv[0]);
+			return 1;
+		}
+		size = clean(buf, (size_t)r);
+		for (off = 0; off < size; off += (size_t)r) {
+			r = write(STDOUT_FILENO, &buf[off], size - off);
+			if (r <= 0) {
+				if (errno == EINTR)
+					continue;
+				perror(argv[0]);
+				return 1;
+			}
+		}
+	}
+
+	return 0;
+}