gallium: added tgsi_num_tokens() function to return number of tokens in token array.

Maybe move to a different file someday.

2 files changed, 17 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_parse.c b/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
index bf6b89ce56..c3526cb71f 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_parse.c
@@ -317,3 +317,16 @@ tgsi_parse_token(
    }
 }
 
+
+unsigned
+tgsi_num_tokens(const struct tgsi_token *tokens)
+{
+   struct tgsi_parse_context ctx;
+   if (tgsi_parse_init(&ctx, tokens) == TGSI_PARSE_OK) {
+      unsigned len = (ctx.FullHeader.Header.HeaderSize +
+                      ctx.FullHeader.Header.BodySize +
+                      1);
+      return len;
+   }
+   return 0;
+}
diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_parse.h b/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
index 40083728d6..a98e88e343 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_parse.h
@@ -113,6 +113,10 @@ void
 tgsi_parse_token(
    struct tgsi_parse_context *ctx );
 
+unsigned
+tgsi_num_tokens(const struct tgsi_token *tokens);
+
+
 #if defined __cplusplus
 }
 #endif