#!/bin/sh

# make-params

# Input is the file "defaultparams"
# Output are files "params.c" and "params.h"
# Intermediate files are "params.1" thru "params.4"
#		params.1: declaration and initial values for the parameters
#		params.2: declares, entry, file manipulation, params file reading
#		params.3: identify parameters' names and initialize them
#		params.4: code to echo the parameters after all are set.

cat /dev/null > params.3

cat	> params.2 << EOF

#include	<string.h>
#include	<ctype.h>
#include	<stdio.h>

#define	_int_	"%d"
#define	_float_	"%f"
#define	_double_	"%f"
#define	_string_	"%s"

#define fig(N,M,T) if(strcmp(key,N)==0)  \\
	{ sscanf(strtok(NULL," \t\n"),T,M);} else

params( argc, argv ) int argc; char * argv[];
{ FILE * fp; char line[128], * key;
EOF

cat	> params.4 << EOF
	/* Conditionally print the parameter values. after they are set. */
	if( ! print_the_params ) return;
EOF

# Process defaultparams information. --------------------------------
cat defaultparams | awk '
BEGIN	{
		format["int"] = "d"; format["float"] = "f"; 
		format["string"] = "s"; format["double"] = "f"; 
		print "/* This is the file params.c */" > "params.1" ;
		print "/* This is the file params.h */" > "params.h" ;
		}

NF==0	{ next } /^#/	{ next }
/%/	{
		type = substr( $1, 2 ); len = $2; ty = "_" type "_"
		print "printf( \"%" $1 " " $2 "\\n\" );" >> "params.4"
		next 
		}

	{ if( type == "string" )
		{
		print "char	" $1 "[" len "]	= \"" $2 "\";" >> "params.1" ;
		print "		fig(\"" $1 "\"," $1 "," ty ")" >> "params.3" 
	  	print "extern char	" $1 "[" len "];" >> "params.h"
		}
	  else
		{
		print type "	" $1 "	= " $2 ";" >>"params.1" ;
		print "		fig(\"" $1 "\",&" $1 "," ty ")" >> "params.3" 
		print "extern " type "	" $1 ";" >> "params.h" ;
		}
	}
	{
	print "printf( \"   " $1 "   %" format[type] "\\n\", " $1 ");" >> "params.4"
	}
'
#-----------------------------------------------------------------
cat	>> params.2 << EOF

if( argc < 2 ) { fp = fopen("params", "r"); }
else { fp = fopen( argv[1], "r" ); }
if( fp == NULL ) { printf("No params file??\n"); return; }

while( fgets( line, 128, fp ) ) { /* read a line from the file "params" */
	key = strtok( line, " \t" );
	if( '%' == key[0] ) printf( "%s\n", line ); /* comments */
	else if( isalpha( key[0] ) ) { 
		if( strcmp( key, "EXIT" )==0 ) break; /* quit processing params */

EOF
#-----------------------------------------------------------------
cat >> params.3 << EOF

	printf("Unknown key-word: %s\n", line);
} /* end if */ } /* end while */

EOF

cat >> params.4 << EOF
} /* end params */
EOF
#-----------------------------------------------------------------
cat	params.[1234] > params.c; \rm params.[1234]