From 0fcfeab521b01160875e863575dd5b63952b1593 Mon Sep 17 00:00:00 2001
From: Joshua Haberman <joshua@reverberate.org>
Date: Sat, 17 Jul 2010 18:30:53 -0700
Subject: Bugfixes, test_decoder successfully stream-decodes a stream!

---
 core/upb_stream.c        |  5 +++++
 stream/upb_decoder.c     | 39 ++++++++++++++++++---------------------
 stream/upb_textprinter.c |  9 +++++----
 3 files changed, 28 insertions(+), 25 deletions(-)

diff --git a/core/upb_stream.c b/core/upb_stream.c
index e63ba00..0d47392 100644
--- a/core/upb_stream.c
+++ b/core/upb_stream.c
@@ -37,14 +37,19 @@ void upb_streamdata(upb_src *src, upb_sink *sink, upb_status *status) {
     CHECKSRC(upb_src_eof(src));
     if (depth == 0) break;
     --depth;
+    upb_src_endmsg(src);
+    upb_sink_endmsg(sink);
   }
+  upb_string_unref(str);
   return;
 
 src_err:
+  upb_string_unref(str);
   upb_copyerr(status, upb_src_status(src));
   return;
 
 sink_err:
+  upb_string_unref(str);
   upb_copyerr(status, upb_sink_status(sink));
   return;
 }
diff --git a/stream/upb_decoder.c b/stream/upb_decoder.c
index 64057c5..949ce2d 100644
--- a/stream/upb_decoder.c
+++ b/stream/upb_decoder.c
@@ -76,7 +76,7 @@ struct upb_decoder {
 
 static upb_strlen_t upb_decoder_offset(upb_decoder *d)
 {
-  return d->buf_stream_offset - d->buf_offset;
+  return d->buf_stream_offset + d->buf_offset;
 }
 
 static bool upb_decoder_nextbuf(upb_decoder *d)
@@ -101,34 +101,30 @@ static bool upb_decoder_nextbuf(upb_decoder *d)
     d->buf_bytesleft += upb_string_len(d->buf);
     return true;
   } else {
-    // Error or EOF.
-    if(!upb_bytesrc_eof(d->bytesrc)) {
-      // Error from bytesrc.
-      upb_copyerr(&d->src.status, upb_bytesrc_status(d->bytesrc));
-      return false;
-    } else if(d->buf_bytesleft == 0) {
-      // EOF from bytesrc and we don't have any residual bytes left.
-      d->src.eof = true;
-      return false;
-    } else {
-      // No more data left from the bytesrc, but we still have residual bytes.
-      return true;
-    }
+    return false;
   }
 }
 
 static const uint8_t *upb_decoder_getbuf_full(upb_decoder *d, uint32_t *bytes)
 {
+  if(d->buf_bytesleft < UPB_MAX_ENCODED_SIZE && !upb_bytesrc_eof(d->bytesrc))
+    upb_decoder_nextbuf(d);
+
   if(d->buf_bytesleft < UPB_MAX_ENCODED_SIZE) {
-    // GCC is currently complaining about use of an uninitialized value if we
-    // don't set this now.  I think this is incorrect, but leaving this in
-    // to suppress the warning for now.
-    *bytes = 0;
-    if(!upb_decoder_nextbuf(d)) return NULL;
+    if(upb_bytesrc_eof(d->bytesrc) && d->buf_bytesleft > 0) {
+      // We're working through the last few bytes of the buffer.
+    } else if(upb_bytesrc_eof(d->bytesrc)) {
+      // End of stream, no more bytes left.
+      assert(d->buf_bytesleft == 0);
+      d->src.eof = true;
+      return NULL;
+    } else {
+      // We are short of bytes even though the bytesrc isn't EOF; must be error.
+      upb_copyerr(&d->src.status, upb_bytesrc_status(d->bytesrc));
+      return NULL;
+    }
   }
 
-  assert(d->buf_bytesleft >= UPB_MAX_ENCODED_SIZE);
-
   if(d->buf_offset >= 0) {
     // Common case: the main buffer contains at least UPB_MAX_ENCODED_SIZE
     // contiguous bytes, so we can read directly out of it.
@@ -467,6 +463,7 @@ bool upb_decoder_startmsg(upb_decoder *d) {
   } else {
     frame->end_offset = upb_decoder_offset(d) + d->delimited_len;
   }
+  d->field = NULL;
   return true;
 }
 
diff --git a/stream/upb_textprinter.c b/stream/upb_textprinter.c
index 201edba..75668a3 100644
--- a/stream/upb_textprinter.c
+++ b/stream/upb_textprinter.c
@@ -23,9 +23,9 @@ struct _upb_textprinter {
 static void upb_textprinter_endfield(upb_textprinter *p)
 {
   if(p->single_line)
-    upb_bytesink_put(p->bytesink, UPB_STRLIT(' '));
+    upb_bytesink_put(p->bytesink, UPB_STRLIT(" "));
   else
-    upb_bytesink_put(p->bytesink, UPB_STRLIT('\n'));
+    upb_bytesink_put(p->bytesink, UPB_STRLIT("\n"));
 }
 
 static bool upb_textprinter_putval(upb_textprinter *p, upb_value val) {
@@ -86,10 +86,9 @@ static bool upb_textprinter_putdef(upb_textprinter *p, upb_fielddef *f)
 
 static bool upb_textprinter_startmsg(upb_textprinter *p)
 {
-  upb_textprinter_indent(p);
   upb_bytesink_put(p->bytesink, p->f->def->fqname);
   upb_bytesink_put(p->bytesink, UPB_STRLIT(" {"));
-  if(!p->single_line) upb_bytesink_put(p->bytesink, UPB_STRLIT('\n'));
+  if(!p->single_line) upb_bytesink_put(p->bytesink, UPB_STRLIT("\n"));
   p->indent_depth++;
   return upb_ok(upb_bytesink_status(p->bytesink));
 }
@@ -114,10 +113,12 @@ upb_sink_vtable upb_textprinter_vtbl = {
 upb_textprinter *upb_textprinter_new() {
   upb_textprinter *p = malloc(sizeof(*p));
   upb_sink_init(&p->sink, &upb_textprinter_vtbl);
+  p->str = NULL;
   return p;
 }
 
 void upb_textprinter_free(upb_textprinter *p) {
+  upb_string_unref(p->str);
   free(p);
 }
 
-- 
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