From 1f5d97ec6a8fcc770ee8b80b21b7a852b55567cd Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 6 Nov 2008 12:11:54 +0000
Subject: Read zlib compressed traces.

---
 src/main.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 93 insertions(+), 1 deletion(-)

diff --git a/src/main.c b/src/main.c
index 8ff0ede..25e6dc3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -32,11 +32,14 @@
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
+#include <zlib.h>
 #include <fcntl.h>
 
 #define APPNAME "Sphinx"
 #define GCONF_DIR "/apps/sphinx"
 
+#define _(x) x
+
 static gboolean
 sphinx_trace_command (sphinx_t *sphinx, const char *command, GError **error);
 
@@ -1173,6 +1176,95 @@ sphinx_trace_command (sphinx_t *sphinx, const char *command, GError **error)
     return TRUE;
 }
 
+static gboolean
+gz_file_get_contents (const char *filename,
+		      gchar **buf_out,
+		      gsize *len_out,
+		      GError **error)
+{
+    gzFile *file;
+    gchar *buf = NULL;
+    gsize allocated;
+    gsize len;
+    int ret;
+    gchar *display_filename;
+    const gchar *errmsg;
+    int errnum;
+
+    file = gzopen (filename, "r");
+    if (file == NULL)
+	goto ERRNO;
+
+    len = 0;
+    allocated = 1024 * 1024;
+    buf = g_try_malloc (1024*1024);
+    if (buf == NULL)
+	goto ERRNO;
+
+    do {
+	ret = gzread (file, buf + len, allocated - len);
+	if (ret < 0) {
+	    errmsg = gzerror (file, &errnum);
+	    if (errnum == Z_ERRNO)
+		goto ERRNO;
+	    else
+		goto GZERR;
+	}
+	if (ret == 0)
+	    break;
+
+	len += ret;
+	if (allocated - len < 16384) {
+	    gchar *newbuf;
+
+	    allocated *= 2;
+	    newbuf = g_try_realloc (buf, allocated);
+	    if (newbuf == NULL)
+		goto ERRNO;
+
+	    buf = newbuf;
+	}
+    } while (TRUE);
+
+    *len_out = len;
+    *buf_out = g_try_realloc (buf, len);
+    if (*buf_out == NULL)
+	*buf_out = buf;
+
+    return TRUE;
+
+
+ GZERR:
+    {
+	display_filename = g_filename_display_name (filename);
+	g_set_error (error,
+		     G_FILE_ERROR,
+		     errnum,
+		     _("Failed to read file '%s': %s"),
+		     display_filename,
+		     errmsg);
+	goto FAIL;
+    }
+ ERRNO:
+    {
+	int save_errno = errno;
+
+	display_filename = g_filename_display_name (filename);
+	g_set_error (error,
+		     G_FILE_ERROR,
+		     g_file_error_from_errno (save_errno),
+		     _("Failed to read file '%s': %s"),
+		     display_filename,
+		     g_strerror (save_errno));
+	goto FAIL;
+    }
+ FAIL:
+    g_free (display_filename);
+    g_free (buf);
+    gzclose (file);
+    return FALSE;
+}
+
 static gboolean
 sphinx_open_trace (sphinx_t *sphinx, const char *filename, GError **error)
 {
@@ -1182,7 +1274,7 @@ sphinx_open_trace (sphinx_t *sphinx, const char *filename, GError **error)
     gsize len;
     gchar *str;
 
-    if (! g_file_get_contents (filename, &buf, &len, error))
+    if (! gz_file_get_contents (filename, &buf, &len, error))
 	return FALSE;
 
     str = g_strdup_printf ("%s - " APPNAME, filename);
-- 
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