From 678799082b9775e601a09af9aa68e59fc1c64f6f Mon Sep 17 00:00:00 2001
From: Joshua Haberman <joshua@reverberate.org>
Date: Sat, 24 Jul 2010 16:23:52 -0700
Subject: Stream decoding benchmark.

---
 benchmarks/parsestream.upb_table.c | 113 +++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 benchmarks/parsestream.upb_table.c

(limited to 'benchmarks')

diff --git a/benchmarks/parsestream.upb_table.c b/benchmarks/parsestream.upb_table.c
new file mode 100644
index 0000000..c6acad9
--- /dev/null
+++ b/benchmarks/parsestream.upb_table.c
@@ -0,0 +1,113 @@
+
+#include "main.c"
+
+#include "upb_def.h"
+#include "upb_decoder.h"
+#include "upb_strstream.h"
+
+static upb_stringsrc *stringsrc;
+static upb_string *input_str;
+static upb_string *tmp_str;
+static upb_msgdef *def;
+static upb_decoder *decoder;
+
+static bool initialize()
+{
+  // Initialize upb state, decode descriptor.
+  upb_status status = UPB_STATUS_INIT;
+  upb_symtab *s = upb_symtab_new();
+  upb_symtab_add_descriptorproto(s);
+  upb_string *fds_str = upb_strreadfile(MESSAGE_DESCRIPTOR_FILE);
+  if(fds_str == NULL) {
+    fprintf(stderr, "Couldn't read " MESSAGE_DESCRIPTOR_FILE ":"),
+    upb_printerr(&status);
+    return false;
+  }
+
+  upb_stringsrc *ssrc = upb_stringsrc_new();
+  upb_stringsrc_reset(ssrc, fds_str);
+  upb_def *fds_def = upb_symtab_lookup(
+      s, UPB_STRLIT("google.protobuf.FileDescriptorSet"));
+  upb_decoder *d = upb_decoder_new(upb_downcast_msgdef(fds_def));
+  upb_decoder_reset(d, upb_stringsrc_bytesrc(ssrc));
+
+  upb_symtab_addfds(s, upb_decoder_src(d), &status);
+
+  if(!upb_ok(&status)) {
+    fprintf(stderr, "Error importing " MESSAGE_DESCRIPTOR_FILE ":");
+    upb_printerr(&status);
+    return false;
+  }
+
+  upb_string_unref(fds_str);
+  upb_decoder_free(d);
+  upb_stringsrc_free(ssrc);
+  upb_def_unref(fds_def);
+
+  def = upb_downcast_msgdef(upb_symtab_lookup(s, UPB_STRLIT(MESSAGE_NAME)));
+  if(!def) {
+    fprintf(stderr, "Error finding symbol '" UPB_STRFMT "'.\n",
+            UPB_STRARG(UPB_STRLIT(MESSAGE_NAME)));
+    return false;
+  }
+  upb_symtab_unref(s);
+
+  // Read the message data itself.
+  input_str = upb_strreadfile(MESSAGE_FILE);
+  if(input_str == NULL) {
+    fprintf(stderr, "Error reading " MESSAGE_FILE "\n");
+    return false;
+  }
+  tmp_str = NULL;
+  decoder = upb_decoder_new(def);
+  stringsrc = upb_stringsrc_new();
+  return true;
+}
+
+static void cleanup()
+{
+  upb_string_unref(input_str);
+  upb_string_unref(tmp_str);
+  upb_def_unref(UPB_UPCAST(def));
+  upb_decoder_free(decoder);
+  upb_stringsrc_free(stringsrc);
+}
+
+static size_t run(int i)
+{
+  (void)i;
+  upb_status status = UPB_STATUS_INIT;
+  upb_stringsrc_reset(stringsrc, input_str);
+  upb_decoder_reset(decoder, upb_stringsrc_bytesrc(stringsrc));
+  upb_src *src = upb_decoder_src(decoder);
+  upb_fielddef *f;
+  upb_string *str = NULL;
+  int depth = 0;
+  while(1) {
+    while((f = upb_src_getdef(src)) != NULL) {
+      if(upb_issubmsg(f)) {
+        upb_src_startmsg(src);
+        ++depth;
+      } else if(upb_isstring(f)) {
+        tmp_str = upb_string_tryrecycle(str);
+        upb_src_getstr(src, tmp_str);
+      } else {
+        // Primitive type.
+        upb_value val;
+        upb_src_getval(src, upb_value_addrof(&val));
+      }
+    }
+    // If we're not EOF now, the loop terminated due to an error.
+    if (!upb_src_eof(src)) goto err;
+    if (depth == 0) break;
+    --depth;
+    upb_src_endmsg(src);
+  }
+  if(!upb_ok(&status)) goto err;
+  return upb_string_len(input_str);
+
+err:
+  fprintf(stderr, "Decode error");
+  upb_printerr(&status);
+  return 0;
+}
-- 
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