alf: Handle 0-byte input files.

1 files changed, 3 insertions, 7 deletions

diff --git a/src/alf.c b/src/alf.c
index 7559eae..a366a5c 100644
--- a/src/alf.c
+++ b/src/alf.c
@@ -285,13 +285,14 @@ void crunch(void) {
 
 	out_bitpos = 0;
 
-	store_token(TOK_RESET);
+	/* 0-byte input files don't get a TOK_RESET */
+	if(input_len)
+		store_token(TOK_RESET);
 
 	while(in_pos < input_len) {
 		token = match_token(in_pos);
 		store_token(token);
 		new_pos = in_pos + tokentab[token].length;
-		// printf("   in_pos %d, new_pos %d\n", in_pos, new_pos);
 		if(new_pos < input_len)
 			make_token(in_pos, new_pos);
 		in_pos = new_pos;
@@ -332,11 +333,6 @@ void crunch_file(const char *filename) {
 		fprintf(stderr, "%s: %s: this file is too large; only compressing the first 16MB.\n", self, filename);
 	}
 
-	if(!input_len) {
-		fprintf(stderr, "%s: %s: can't compress a 0-byte (empty) file, skipping.\n", self, filename);
-		return;
-	}
-
 	if(opt_txtconv)
 		convert_eols();