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/*
* Copyright 1993, 1995 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
# include "jam.h"
# include "option.h"
/*
* 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."
*/
int getoptions( int argc, char * * argv, char * opts, bjam_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 ] != '-' ) ||
( ( argv[ i ][ 1 ] != '-' ) && !isalpha( argv[ i ][ 1 ] ) ) )
continue;
if ( !optc-- )
{
printf( "too many options (%d max)\n", N_OPTS );
return -1;
}
for ( arg = &argv[ i ][ 1 ]; *arg; ++arg )
{
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.
*/
char * getoptval( bjam_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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