/**************************************************************************
 *
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/


/**
 * @file
 * Trace dumping functions.
 * 
 * For now we just use standard XML for dumping the trace calls, as this is
 * simple to write, parse, and visually inspect, but the actual representation 
 * is abstracted out of this file, so that we can switch to a binary 
 * representation if/when it becomes justified.
 * 
 * @author Jose Fonseca <jrfonseca@tungstengraphics.com>   
 */

#include "pipe/p_config.h"

#if defined(PIPE_OS_LINUX)
#include <stdlib.h>
#endif

#include "pipe/p_compiler.h"
#include "util/u_string.h"

#include "tr_stream.h"
#include "tr_dump.h"


static struct trace_stream *stream = NULL;


static INLINE void 
trace_dump_write(const char *buf, size_t size)
{
   if(stream)
      trace_stream_write(stream, buf, size);
}


static INLINE void 
trace_dump_writes(const char *s)
{
   trace_dump_write(s, strlen(s));
}


static INLINE void 
trace_dump_writef(const char *format, ...)
{
   static char buf[1024];
   unsigned len;
   va_list ap;
   va_start(ap, format);
   len = util_vsnprintf(buf, sizeof(buf), format, ap);
   va_end(ap);
   trace_dump_write(buf, len);
}


static INLINE void 
trace_dump_escape(const char *str) 
{
   const unsigned char *p = (const unsigned char *)str;
   unsigned char c;
   while((c = *p++) != 0) {
      if(c == '<')
         trace_dump_writes("&lt;");
      else if(c == '>')
         trace_dump_writes("&gt;");
      else if(c == '&')
         trace_dump_writes("&amp;");
      else if(c == '\'')
         trace_dump_writes("&apos;");
      else if(c == '\"')
         trace_dump_writes("&quot;");
      else if(c >= 0x20 && c <= 0x7e)
         trace_dump_writef("%c", c);
      else
         trace_dump_writef("&#%u;", c);
   }
}


static INLINE void 
trace_dump_indent(unsigned level)
{
   unsigned i;
   for(i = 0; i < level; ++i)
      trace_dump_writes("\t");
}


static INLINE void 
trace_dump_newline(void) 
{
   trace_dump_writes("\n");
}


static INLINE void 
trace_dump_tag(const char *name)
{
   trace_dump_writes("<");
   trace_dump_writes(name);
   trace_dump_writes("/>");
}


static INLINE void 
trace_dump_tag_begin(const char *name)
{
   trace_dump_writes("<");
   trace_dump_writes(name);
   trace_dump_writes(">");
}

static INLINE void 
trace_dump_tag_begin1(const char *name, 
                      const char *attr1, const char *value1)
{
   trace_dump_writes("<");
   trace_dump_writes(name);
   trace_dump_writes(" ");
   trace_dump_writes(attr1);
   trace_dump_writes("='");
   trace_dump_escape(value1);
   trace_dump_writes("'>");
}


static INLINE void 
trace_dump_tag_begin2(const char *name, 
                      const char *attr1, const char *value1,
                      const char *attr2, const char *value2)
{
   trace_dump_writes("<");
   trace_dump_writes(name);
   trace_dump_writes(" ");
   trace_dump_writes(attr1);
   trace_dump_writes("=\'");
   trace_dump_escape(value1);
   trace_dump_writes("\' ");
   trace_dump_writes(attr2);
   trace_dump_writes("=\'");
   trace_dump_escape(value2);
   trace_dump_writes("\'>");
}


static INLINE void 
trace_dump_tag_begin3(const char *name, 
                      const char *attr1, const char *value1,
                      const char *attr2, const char *value2,
                      const char *attr3, const char *value3)
{
   trace_dump_writes("<");
   trace_dump_writes(name);
   trace_dump_writes(" ");
   trace_dump_writes(attr1);
   trace_dump_writes("=\'");
   trace_dump_escape(value1);
   trace_dump_writes("\' ");
   trace_dump_writes(attr2);
   trace_dump_writes("=\'");
   trace_dump_escape(value2);
   trace_dump_writes("\' ");
   trace_dump_writes(attr3);
   trace_dump_writes("=\'");
   trace_dump_escape(value3);
   trace_dump_writes("\'>");
}


static INLINE void
trace_dump_tag_end(const char *name)
{
   trace_dump_writes("</");
   trace_dump_writes(name);
   trace_dump_writes(">");
}

boolean trace_dump_trace_begin()
{
   if(!debug_get_bool_option("GALLIUM_TRACE", FALSE))
      return FALSE;
   
   stream = trace_stream_create("gallium", "trace");
   if(!stream)
      return FALSE;
   
   trace_dump_writes("<?xml version='1.0' encoding='UTF-8'?>\n");
   trace_dump_writes("<?xml-stylesheet type='text/xsl' href='trace.xsl'?>\n");
   trace_dump_writes("<trace version='0.1'>\n");
   
#if defined(PIPE_OS_LINUX)
   /* Linux applications rarely cleanup GL / Gallium resources so catch 
    * application exit here */ 
   atexit(trace_dump_trace_end);
#endif
   
   return TRUE;
}

void trace_dump_trace_end(void)
{
   if(stream) {
      trace_dump_writes("</trace>\n");
      trace_stream_close(stream);
      stream = NULL;
   }
}

void trace_dump_call_begin(const char *klass, const char *method)
{
   trace_dump_indent(1);
   trace_dump_tag_begin2("call", "class", klass, "method", method);
   trace_dump_newline();
}

void trace_dump_call_end(void)
{
   trace_dump_indent(1);
   trace_dump_tag_end("call");
   trace_dump_newline();
}

void trace_dump_arg_begin(const char *name)
{
   trace_dump_indent(2);
   trace_dump_tag_begin1("arg", "name", name);
}

void trace_dump_arg_end(void)
{
   trace_dump_tag_end("arg");
   trace_dump_newline();
}

void trace_dump_ret_begin(void)
{
   trace_dump_indent(2);
   trace_dump_tag_begin("ret");
}

void trace_dump_ret_end(void)
{
   trace_dump_tag_end("ret");
   trace_dump_newline();
}

void trace_dump_bool(int value)
{
   trace_dump_writef("<bool>%c</bool>", value ? '1' : '0');
}

void trace_dump_int(long int value)
{
   trace_dump_writef("<int>%li</int>", value);
}

void trace_dump_uint(long unsigned value)
{
   trace_dump_writef("<uint>%lu</uint>", value);
}

void trace_dump_float(double value)
{
   trace_dump_writef("<float>%g</float>", value);
}

void trace_dump_bytes(const void *data,
                      long unsigned size)
{
   static const char hex_table[16] = "0123456789ABCDEF";
   const uint8_t *p = data;
   long unsigned i;
   trace_dump_writes("<bytes>");
   for(i = 0; i < size; ++i) {
      uint8_t byte = *p++;
      char hex[2];
      hex[0] = hex_table[byte >> 4];
      hex[1] = hex_table[byte & 0xf];
      trace_dump_write(hex, 2);
   }
   trace_dump_writes("</bytes>");
}

void trace_dump_string(const char *str)
{
   trace_dump_writes("<string>");
   trace_dump_escape(str);
   trace_dump_writes("</string>");
}

void trace_dump_enum(const char *value)
{
   trace_dump_writes("<enum>");
   trace_dump_escape(value);
   trace_dump_writes("</enum>");
}

void trace_dump_array_begin(void)
{
   trace_dump_writes("<array>");
}

void trace_dump_array_end(void)
{
   trace_dump_writes("</array>");
}

void trace_dump_elem_begin(void)
{
   trace_dump_writes("<elem>");
}

void trace_dump_elem_end(void)
{
   trace_dump_writes("</elem>");
}

void trace_dump_struct_begin(const char *name)
{
   trace_dump_writef("<struct name='%s'>", name);
}

void trace_dump_struct_end(void)
{
   trace_dump_writes("</struct>");
}

void trace_dump_member_begin(const char *name)
{
   trace_dump_writef("<member name='%s'>", name);
}

void trace_dump_member_end(void)
{
   trace_dump_writes("</member>");
}

void trace_dump_null(void)
{
   trace_dump_writes("<null/>");
}

void trace_dump_ptr(const void *value)
{
   if(value)
      trace_dump_writef("<ptr>%p</ptr>", value);
   else
      trace_dump_null();
}