os_stream: add printf facility

6 files changed, 83 insertions, 3 deletions

diff --git a/src/gallium/auxiliary/os/os_stream.c b/src/gallium/auxiliary/os/os_stream.c
new file mode 100644
index 00000000000..2d4e1852ba4
--- /dev/null
+++ b/src/gallium/auxiliary/os/os_stream.c
@@ -0,0 +1,40 @@
+#include "pipe/p_config.h"
+
+#include "os_stream.h"
+#include "util/u_memory.h"
+#include "util/u_string.h"
+
+int
+os_default_stream_vprintf (struct os_stream* stream, const char *format, va_list ap)
+{
+   char buf[1024];
+   int retval;
+
+   retval = util_vsnprintf(buf, sizeof(buf), format, ap);
+   if(retval <= 0)
+   {}
+   else if(retval < sizeof(buf))
+      stream->write(stream, buf, retval);
+   else
+   {
+      int alloc = sizeof(buf);
+      char* str = NULL;
+      for(;;)
+      {
+         alloc += alloc;
+         if(str)
+            FREE(str);
+         str = MALLOC(alloc);
+         if(!str)
+            return -1;
+
+         retval = util_vsnprintf(str, alloc, format, ap);
+      } while(retval >= alloc);
+
+      if(retval > 0)
+         stream->write(stream, str, retval);
+      FREE(str);
+   }
+
+   return retval;
+}
diff --git a/src/gallium/auxiliary/os/os_stream.h b/src/gallium/auxiliary/os/os_stream.h
index 693a0621e2d..6c6050bb028 100644
--- a/src/gallium/auxiliary/os/os_stream.h
+++ b/src/gallium/auxiliary/os/os_stream.h
@@ -50,6 +50,9 @@ struct os_stream
 
    void
    (*flush)(struct os_stream *stream);
+
+   int
+   (*vprintf)(struct os_stream *stream, const char* format, va_list ap);
 };
 
 
@@ -90,6 +93,27 @@ os_stream_flush(struct os_stream *stream)
    stream->flush(stream);
 }
 
+int
+os_default_stream_vprintf (struct os_stream* stream, const char *format, va_list ap);
+
+static INLINE int
+os_stream_vprintf (struct os_stream* stream, const char *format, va_list ap)
+{
+   return stream->vprintf(stream, format, ap);
+}
+
+static INLINE int
+os_stream_printf (struct os_stream* stream, const char *format, ...)
+{
+   int retval;
+   va_list args;
+
+   va_start (args, format);
+   retval = stream->vprintf(stream, format, args);
+   va_end (args);
+
+   return retval;
+}
 
 struct os_stream *
 os_file_stream_create(const char *filename);
@@ -118,5 +142,4 @@ os_str_stream_get_and_close(struct os_stream *stream);
 #define os_file_stream_create(_filename) os_null_stream_create()
 #endif
 
-
 #endif /* _OS_STREAM_H_ */
diff --git a/src/gallium/auxiliary/os/os_stream_log.c b/src/gallium/auxiliary/os/os_stream_log.c
index 7cc2028a22c..b01377c3468 100644
--- a/src/gallium/auxiliary/os/os_stream_log.c
+++ b/src/gallium/auxiliary/os/os_stream_log.c
@@ -73,7 +73,8 @@ static struct os_stream
 os_log_stream_struct = {
    &os_log_stream_close,
    &os_log_stream_write,
-   &os_log_stream_flush
+   &os_log_stream_flush,
+   &os_default_stream_vprintf,
 };
 
 
diff --git a/src/gallium/auxiliary/os/os_stream_null.c b/src/gallium/auxiliary/os/os_stream_null.c
index 128c4e8f0e0..a549a789e62 100644
--- a/src/gallium/auxiliary/os/os_stream_null.c
+++ b/src/gallium/auxiliary/os/os_stream_null.c
@@ -56,12 +56,18 @@ os_null_stream_flush(struct os_stream *stream)
    (void)stream;
 }
 
+static int
+os_null_stream_vprintf (struct os_stream* stream, const char *format, va_list ap)
+{
+   return 0;
+}
 
 static struct os_stream
 os_null_stream = {
    &os_null_stream_close,
    &os_null_stream_write,
-   &os_null_stream_flush
+   &os_null_stream_flush,
+   &os_null_stream_vprintf
 };
 
 
diff --git a/src/gallium/auxiliary/os/os_stream_stdc.c b/src/gallium/auxiliary/os/os_stream_stdc.c
index 9e7ed711076..37e7d063e2b 100644
--- a/src/gallium/auxiliary/os/os_stream_stdc.c
+++ b/src/gallium/auxiliary/os/os_stream_stdc.c
@@ -83,6 +83,14 @@ os_stdc_stream_flush(struct os_stream *_stream)
    fflush(stream->file);
 }
 
+static int
+os_stdc_stream_vprintf (struct os_stream* _stream, const char *format, va_list ap)
+{
+   struct os_stdc_stream *stream = os_stdc_stream(_stream);
+
+   return vfprintf(stream->file, format, ap);
+}
+
 
 struct os_stream *
 os_file_stream_create(const char *filename)
@@ -96,6 +104,7 @@ os_file_stream_create(const char *filename)
    stream->base.close = &os_stdc_stream_close;
    stream->base.write = &os_stdc_stream_write;
    stream->base.flush = &os_stdc_stream_flush;
+   stream->base.vprintf = &os_stdc_stream_vprintf;
 
    stream->file = fopen(filename, "w");
    if(!stream->file)
diff --git a/src/gallium/auxiliary/os/os_stream_str.c b/src/gallium/auxiliary/os/os_stream_str.c
index b5c7270d2ae..be9478b2a17 100644
--- a/src/gallium/auxiliary/os/os_stream_str.c
+++ b/src/gallium/auxiliary/os/os_stream_str.c
@@ -118,6 +118,7 @@ os_str_stream_create(size_t size)
    stream->base.close = &os_str_stream_close;
    stream->base.write = &os_str_stream_write;
    stream->base.flush = &os_str_stream_flush;
+   stream->base.vprintf = &os_default_stream_vprintf;
 
    stream->str = os_malloc(size);
    if(!stream->str)