From: Sven Verdoolaege <skimo@kotnet.org>
Date: Tue, 23 Feb 2010 14:28:15 +0000 (+0100)
Subject: isl_stream: add some auxiliary functions
X-Git-Tag: isl-0.02~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=41c8814a66a9c4100621dbc57c4b75bbd13f1cbf;p=platform%2Fupstream%2Fisl.git

isl_stream: add some auxiliary functions
---

diff --git a/isl_stream.c b/isl_stream.c
index 650b115..64f81ee 100644
--- a/isl_stream.c
+++ b/isl_stream.c
@@ -342,6 +342,50 @@ struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s)
 	return next_token(s, 1);
 }
 
+int isl_stream_eat_if_available(struct isl_stream *s, int type)
+{
+	struct isl_token *tok;
+
+	tok = isl_stream_next_token(s);
+	if (!tok)
+		return 0;
+	if (tok->type == type) {
+		isl_token_free(tok);
+		return 1;
+	}
+	isl_stream_push_token(s, tok);
+	return 0;
+}
+
+int isl_stream_next_token_is(struct isl_stream *s, int type)
+{
+	struct isl_token *tok;
+	int r;
+
+	tok = isl_stream_next_token(s);
+	if (!tok)
+		return 0;
+	r = tok->type == type;
+	isl_stream_push_token(s, tok);
+	return r;
+}
+
+char *isl_stream_read_ident_if_available(struct isl_stream *s)
+{
+	struct isl_token *tok;
+
+	tok = isl_stream_next_token(s);
+	if (!tok)
+		return NULL;
+	if (tok->type == ISL_TOKEN_IDENT) {
+		char *ident = strdup(tok->u.s);
+		isl_token_free(tok);
+		return ident;
+	}
+	isl_stream_push_token(s, tok);
+	return NULL;
+}
+
 int isl_stream_eat(struct isl_stream *s, int type)
 {
 	struct isl_token *tok;
@@ -358,6 +402,19 @@ int isl_stream_eat(struct isl_stream *s, int type)
 	return -1;
 }
 
+int isl_stream_is_empty(struct isl_stream *s)
+{
+	struct isl_token *tok;
+
+	tok = isl_stream_next_token(s);
+
+	if (!tok)
+		return 1;
+
+	isl_stream_push_token(s, tok);
+	return 0;
+}
+
 void isl_stream_free(struct isl_stream *s)
 {
 	if (!s)
diff --git a/isl_stream.h b/isl_stream.h
index f0c2fe1..905476b 100644
--- a/isl_stream.h
+++ b/isl_stream.h
@@ -63,8 +63,12 @@ void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg);
 
 struct isl_token *isl_stream_next_token(struct isl_stream *s);
 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s);
+int isl_stream_next_token_is(struct isl_stream *s, int type);
 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok);
+int isl_stream_eat_if_available(struct isl_stream *s, int type);
+char *isl_stream_read_ident_if_available(struct isl_stream *s);
 int isl_stream_eat(struct isl_stream *s, int type);
+int isl_stream_is_empty(struct isl_stream *s);
 
 #if defined(__cplusplus)
 }