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/*
* Copyright 1993, 1995 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/*
* option.c - command line option processing
*
* {o >o
* \<>) "Process command line options as defined in <option.h>.
* Return the number of argv[] elements used up by options,
* or -1 if an invalid option flag was given or an argument
* was supplied for an option that does not require one."
*
* 11/04/02 (seiwald) - const-ing for string literals
*/
# include "jam.h"
# include "option.h"
int
getoptions(
int argc,
char **argv,
const char *opts,
option *optv )
{
int i;
int optc = N_OPTS;
memset( (char *)optv, '\0', sizeof( *optv ) * N_OPTS );
for( i = 0; i < argc; i++ )
{
char *arg;
if( argv[i][0] != '-' || !isalpha( argv[i][1] ) )
break;
if( !optc-- )
{
printf( "too many options (%d max)\n", N_OPTS );
return -1;
}
for( arg = &argv[i][1]; *arg; arg++ )
{
const char *f;
for( f = opts; *f; f++ )
if( *f == *arg )
break;
if( !*f )
{
printf( "Invalid option: -%c\n", *arg );
return -1;
}
optv->flag = *f;
if( f[1] != ':' )
{
optv++->val = "true";
}
else if( arg[1] )
{
optv++->val = &arg[1];
break;
}
else if( ++i < argc )
{
optv++->val = argv[i];
break;
}
else
{
printf( "option: -%c needs argument\n", *f );
return -1;
}
}
}
return i;
}
/*
* Name: getoptval() - find an option given its character
*/
const char *
getoptval(
option *optv,
char opt,
int subopt )
{
int i;
for( i = 0; i < N_OPTS; i++, optv++ )
if( optv->flag == opt && !subopt-- )
return optv->val;
return 0;
}
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