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diff --git a/private/sdktools/masm/asmdebug.h b/private/sdktools/masm/asmdebug.h
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+++ b/private/sdktools/masm/asmdebug.h
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+/* asmdebug.h -- include file for microsoft 80x86 assembler
+**
+** microsoft (r) macro assembler
+** copyright (c) microsoft corp 1986.  all rights reserved
+**
+** randy nevin
+*/
+
+/***    Output debugging information
+ *      Ross Garmoe
+ *      Copyright Microsoft Corporation, 1983
+ *      September 27, 9 1983
+ *
+ *      This package was developed using concepts originally developed by
+ *      Mark Zibokowski for the C version of the z editor.
+ *
+ *      The following set of macros output debugging information to the
+ *      debugging file 'd_df'.  Output of debugging information is controlled
+ *      by compile time conditionals and flags set by execution time switches.
+ *      If the symbol DEBUG is defined at compile time, the macros are
+ *      compiled to generate debugging information.  If DEBUG is not defined,
+ *      then the macros are not compiled.  At execution time, the value of
+ *      the variable 'd_debug' is compared with the value of the defined symbol
+ *      DEBFLAG and if any bits match, debugging information is written.
+ *      If debugging information is to be written, the information level
+ *      specified in the macro is checked against the level specified at run
+ *      time and information is written only if the compile level is less than
+ *      the level specified at run time.
+ *
+ *      The macros are used as follows:
+ *
+ *      Define the global variables 'd_debug', 'd_dlevel', 'd_indent' and 'd_sindent'
+ *      as integers and 'd_df' as a pointer to FILE.  In the argument processing
+ *      routine set the value of 'd_debug' and 'd_dlevel' and open the trace output
+ *      file and point to it with the variable 'd_df'.  'd_debug' , 'd_dlevel' and
+ *      'd_indent' must be intialized to zero.
+ *
+ *      In any file of the program which is to produce debugging output,
+ *      include this file 'debug.h' and define the selection symbol DEBFLAG.
+ *
+ *              #include debug.h
+ *              #define DEBFLAG value
+ *
+ *      Then for any function which is to produce debug output include the
+ *      following sets of macro calls.
+ *
+ *      At fuction entry:
+ *
+ *                      INDEBUG;
+ *                      DEBOUT (level, ( fprintf argument string ));
+ *
+ *      At all function exits:
+ *
+ *                      DEBOUT (level, ( fprintf argument string ));
+ *                      OUTDEBUG;
+ *
+ *      At other points of interest:
+ *
+ *                      DEBOUT (level, ( fprintf argument string ));
+ *
+ *      Note:   For the entry and exit points, the DEBOUT ((...)); string
+ *              is optional.  The INDEBUG and OUTDEBUG macros control the
+ *              indentation of the debug output to show the nesting levels of
+ *              function calls
+ *      Note:   The fprintf argument string is of the form:
+ *                      d_df, "format", arg1, arg2,..., argn
+ */
+
+#ifdef DEBUG
+# define INDEBUG      if(d_debug&DEBFLAG)d_indent++
+# define DEBOUT(l,z)  if(d_debug&DEBFLAG&&l<=d_dlevel)\
+                     {for(d_sindent=d_indent;d_sindent;d_sindent--)fprintf(d_df," ");\
+                     fprintf z ;}else
+# define OUTDEBUG     if(d_debug&DEBFLAG)d_indent--
+  extern  long    d_debug, d_dlevel, d_indent;          /* debugging flags */
+  extern  long    d_sindent;                /* indentation printing temporary */
+  extern  FILE    *d_df;                    /* pointer to debug output file */
+#else
+# define INDEBUG
+# define DEBOUT(l,z)
+# define OUTDEBUG
+#endif