[Groff] improved trace package

[Werner LEMBERG]

Below an improved version of trace.tmac; it now shows the nesting
level by adding whitespace at the beginning of the tracing message.

I've commited it to the CVS.


    Werner

======================================================================

.\" trace.tmac
.\"
.\" Load this before a macro package that you want to trace.
.
.nr _C \n(.C
.cp 0
.
.do ds !!sp " \"
.
.eo
.
.rn de !!de
.
.
.!!de de
.  do ecs
.  ec
.  do !!de \$1
.    ie "\$1"\\$0" .do tm1 "\\*[!!sp]*** de trace enter: \\$0 \\$@
.    el .do tm1 "\*[!!sp]*** trace enter \$1: \\$0 \\$@
.    do as !!sp " \"
.    do nop \\*[!!\$1]\\
.    do substring !!sp 1
.    ie "\$1"\\$0" .do tm1 "\\*[!!sp]*** trace exit: \\$0 \\$@
.    el .do tm1 "\*[!!sp]*** trace exit \$1: \\$0 \\$@
\..
.
.  do ds !!d1 !!\$1
.  do ds !!d2 \$2
.
.  do ecr
.  do dei !!d1 !!d2
..
.
.rn am !!am
.
.!!am am
.  do ecs
.  ec
.  do !!am \$1
.    ie "\$1"\\$0" .do tm1 "\\*[!!sp]*** am trace enter: \\$0 \\$@
.    el .do tm1 "\*[!!sp]*** am trace enter \$1: \\$0 \\$@
.    as !!sp " \"
.    do nop \\*[!!\$1]\\
.    substring !!sp 1
.    ie "\$1"\\$0" .do tm1 "\\*[!!sp]*** trace exit: \\$0 \\$@
.    el .do tm1 "\*[!!sp]*** trace exit \$1: \\$0 \\$@
\..
.
.  do ds !!a1 !!\$1
.  do ds !!a2 \$2
.
.  do ecr
.  do ami !!a1 !!a2
..
.
.ec
.
.cp \n(_C
.
.\" EOF