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b14209b789
Cleanup done while researching the Boost Jam internals. Added better implementation description comments at many places. Cleaned up the 'dependant' and 'dependency' terminology that got mixed up in several places. Renamed several functions to use underscores as word separators. [SVN r48480]
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
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* Copyright 1993, 1995 Christopher Seiwald.
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*
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* This file is part of Jam - see jam.c for Copyright information.
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*/
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# include "jam.h"
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# include "option.h"
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/*
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* option.c - command line option processing
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*
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* {o >o
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* \<>) "Process command line options as defined in <option.h>.
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* Return the number of argv[] elements used up by options,
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* or -1 if an invalid option flag was given or an argument
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* was supplied for an option that does not require one."
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*/
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int getoptions( int argc, char * * argv, char * opts, option * optv )
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{
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int i;
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int optc = N_OPTS;
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memset( (char *)optv, '\0', sizeof( *optv ) * N_OPTS );
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for ( i = 0; i < argc; ++i )
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{
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char *arg;
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if ( ( argv[ i ][ 0 ] != '-' ) ||
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( ( argv[ i ][ 1 ] != '-' ) && !isalpha( argv[ i ][ 1 ] ) ) )
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continue;
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if ( !optc-- )
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{
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printf( "too many options (%d max)\n", N_OPTS );
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return -1;
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}
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for ( arg = &argv[ i ][ 1 ]; *arg; ++arg )
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{
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char * f;
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for ( f = opts; *f; ++f )
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if ( *f == *arg )
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break;
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if ( !*f )
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{
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printf( "Invalid option: -%c\n", *arg );
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return -1;
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}
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optv->flag = *f;
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if ( f[ 1 ] != ':' )
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{
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optv++->val = "true";
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}
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else if ( arg[ 1 ] )
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{
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optv++->val = &arg[1];
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break;
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}
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else if ( ++i < argc )
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{
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optv++->val = argv[ i ];
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break;
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}
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else
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{
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printf( "option: -%c needs argument\n", *f );
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return -1;
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}
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}
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}
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return i;
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}
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/*
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* Name: getoptval() - find an option given its character.
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*/
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char * getoptval( option * optv, char opt, int subopt )
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{
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int i;
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for ( i = 0; i < N_OPTS; ++i, ++optv )
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if ( ( optv->flag == opt ) && !subopt-- )
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return optv->val;
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return 0;
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}
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