inflate / deflate

1 files changed, 41 insertions, 0 deletions

diff --git a/user/inflate.c b/user/inflate.c
new file mode 100644
index 0000000..2f7a3d6
--- /dev/null
+++ b/user/inflate.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+int main(int argc, char **argv)
+{
+	FILE *in, *out;
+	int length, value;
+
+	if (argc != 3) {
+		fprintf(stderr, "usage: inflate in out\n");
+		return 1;
+	}
+
+	in = fopen(argv[1], "rb");
+	if (in == NULL) {
+		fprintf(stderr, "cannot read: %s\n", argv[1]);
+		return 1;
+	}
+
+	out = fopen(argv[2], "wb");
+	if (out == NULL) {
+		fprintf(stderr, "cannot write %s\n", argv[2]);
+		return 1;
+	}
+
+	while (1) {
+		length = getc(in);
+		value = getc(in);
+
+		if (length == EOF)
+			break;
+
+		if (value == EOF)
+			return 1;
+
+		for (int i = 0; i < length; i++)
+			putc(value, out);
+	}
+
+	return 0;
+}