360 lines
11 KiB
C
360 lines
11 KiB
C
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/*
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* sort.c $Id: sort.c,v 4.10 2007/04/28 22:19:23 bkorb Exp $
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* Time-stamp: "2006-10-18 11:29:04 bkorb"
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*
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* This module implements argument sorting.
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*/
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/*
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* Automated Options copyright 1992-2007 Bruce Korb
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*
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* Automated Options is free software.
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* You may redistribute it and/or modify it under the terms of the
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* GNU General Public License, as published by the Free Software
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* Foundation; either version 2, or (at your option) any later version.
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*
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* Automated Options is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Automated Options. See the file "COPYING". If not,
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* write to: The Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* As a special exception, Bruce Korb gives permission for additional
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* uses of the text contained in his release of AutoOpts.
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*
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* The exception is that, if you link the AutoOpts library with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the AutoOpts library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by Bruce Korb under
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* the name AutoOpts. If you copy code from other sources under the
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* General Public License into a copy of AutoOpts, as the General Public
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* License permits, the exception does not apply to the code that you add
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* in this way. To avoid misleading anyone as to the status of such
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* modified files, you must delete this exception notice from them.
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*
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* If you write modifications of your own for AutoOpts, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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/* = = = START-STATIC-FORWARD = = = */
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/* static forward declarations maintained by :mkfwd */
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static tSuccess
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mustHandleArg( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx );
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static tSuccess
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mayHandleArg( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx );
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static tSuccess
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checkShortOpts( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx );
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/* = = = END-STATIC-FORWARD = = = */
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/*
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* "mustHandleArg" and "mayHandleArg" are really similar. The biggest
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* difference is that "may" will consume the next argument only if it
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* does not start with a hyphen and "must" will consume it, hyphen or not.
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*/
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static tSuccess
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mustHandleArg( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx )
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{
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/*
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* An option argument is required. Long options can either have
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* a separate command line argument, or an argument attached by
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* the '=' character. Figure out which.
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*/
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switch (pOS->optType) {
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case TOPT_SHORT:
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/*
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* See if an arg string follows the flag character. If not,
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* the next arg must be the option argument.
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*/
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if (*pzArg != NUL)
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return SUCCESS;
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break;
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case TOPT_LONG:
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/*
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* See if an arg string has already been assigned (glued on
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* with an `=' character). If not, the next is the opt arg.
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*/
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if (pOS->pzOptArg != NULL)
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return SUCCESS;
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break;
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default:
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return FAILURE;
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}
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if (pOpts->curOptIdx >= pOpts->origArgCt)
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return FAILURE;
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ppzOpts[ (*pOptsIdx)++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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return SUCCESS;
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}
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static tSuccess
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mayHandleArg( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx )
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{
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/*
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* An option argument is optional.
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*/
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switch (pOS->optType) {
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case TOPT_SHORT:
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/*
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* IF nothing is glued on after the current flag character,
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* THEN see if there is another argument. If so and if it
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* does *NOT* start with a hyphen, then it is the option arg.
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*/
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if (*pzArg != NUL)
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return SUCCESS;
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break;
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case TOPT_LONG:
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/*
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* Look for an argument if we don't already have one (glued on
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* with a `=' character)
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*/
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if (pOS->pzOptArg != NULL)
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return SUCCESS;
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break;
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default:
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return FAILURE;
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}
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if (pOpts->curOptIdx >= pOpts->origArgCt)
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return PROBLEM;
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pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
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if (*pzArg != '-')
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ppzOpts[ (*pOptsIdx)++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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return SUCCESS;
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}
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/*
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* Process a string of short options glued together. If the last one
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* does or may take an argument, the do the argument processing and leave.
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*/
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static tSuccess
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checkShortOpts( tOptions* pOpts, char* pzArg, tOptState* pOS,
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char** ppzOpts, int* pOptsIdx )
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{
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while (*pzArg != NUL) {
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if (FAILED( shortOptionFind( pOpts, (tAoUC)*pzArg, pOS )))
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return FAILURE;
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/*
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* See if we can have an arg.
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*/
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if (OPTST_GET_ARGTYPE(pOS->pOD->fOptState) == OPARG_TYPE_NONE) {
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pzArg++;
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} else if (pOS->pOD->fOptState & OPTST_ARG_OPTIONAL) {
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/*
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* Take an argument if it is not attached and it does not
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* start with a hyphen.
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*/
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if (pzArg[1] != NUL)
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return SUCCESS;
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pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
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if (*pzArg != '-')
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ppzOpts[ (*pOptsIdx)++ ] =
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pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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return SUCCESS;
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} else {
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/*
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* IF we need another argument, be sure it is there and
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* take it.
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*/
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if (pzArg[1] == NUL) {
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if (pOpts->curOptIdx >= pOpts->origArgCt)
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return FAILURE;
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ppzOpts[ (*pOptsIdx)++ ] =
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pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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}
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return SUCCESS;
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}
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}
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return SUCCESS;
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}
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/*
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* If the program wants sorted options (separated operands and options),
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* then this routine will to the trick.
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*/
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LOCAL void
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optionSort( tOptions* pOpts )
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{
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char** ppzOpts;
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char** ppzOpds;
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int optsIdx = 0;
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int opdsIdx = 0;
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tOptState os = OPTSTATE_INITIALIZER(DEFINED);
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/*
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* Disable for POSIX conformance, or if there are no operands.
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*/
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if ( (getenv( "POSIXLY_CORRECT" ) != NULL)
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|| NAMED_OPTS(pOpts))
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return;
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/*
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* Make sure we can allocate two full-sized arg vectors.
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*/
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ppzOpts = malloc( pOpts->origArgCt * sizeof( char* ));
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if (ppzOpts == NULL)
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goto exit_no_mem;
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ppzOpds = malloc( pOpts->origArgCt * sizeof( char* ));
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if (ppzOpds == NULL) {
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free( ppzOpts );
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goto exit_no_mem;
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}
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pOpts->curOptIdx = 1;
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pOpts->pzCurOpt = NULL;
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/*
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* Now, process all the options from our current position onward.
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* (This allows interspersed options and arguments for the few
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* non-standard programs that require it.)
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*/
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for (;;) {
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char* pzArg;
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tSuccess res;
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/*
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* If we're out of arguments, we're done. Join the option and
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* operand lists into the original argument vector.
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*/
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if (pOpts->curOptIdx >= pOpts->origArgCt) {
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errno = 0;
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goto joinLists;
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}
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pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
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if (*pzArg != '-') {
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ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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continue;
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}
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switch (pzArg[1]) {
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case NUL:
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/*
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* A single hyphen is an operand.
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*/
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ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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continue;
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case '-':
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/*
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* Two consecutive hypens. Put them on the options list and then
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* _always_ force the remainder of the arguments to be operands.
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*/
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if (pzArg[2] == NUL) {
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ppzOpts[ optsIdx++ ] =
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pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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goto restOperands;
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}
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res = longOptionFind( pOpts, pzArg+2, &os );
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break;
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default:
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/*
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* If short options are not allowed, then do long
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* option processing. Otherwise the character must be a
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* short (i.e. single character) option.
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*/
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if ((pOpts->fOptSet & OPTPROC_SHORTOPT) == 0) {
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res = longOptionFind( pOpts, pzArg+1, &os );
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} else {
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res = shortOptionFind( pOpts, (tAoUC)pzArg[1], &os );
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}
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break;
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}
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if (FAILED( res )) {
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errno = EINVAL;
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goto freeTemps;
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}
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/*
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* We've found an option. Add the argument to the option list.
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* Next, we have to see if we need to pull another argument to be
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* used as the option argument.
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*/
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ppzOpts[ optsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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if (OPTST_GET_ARGTYPE(os.pOD->fOptState) == OPARG_TYPE_NONE) {
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/*
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* No option argument. If we have a short option here,
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* then scan for short options until we get to the end
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* of the argument string.
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*/
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if ( (os.optType == TOPT_SHORT)
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&& FAILED( checkShortOpts( pOpts, pzArg+2, &os,
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ppzOpts, &optsIdx )) ) {
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errno = EINVAL;
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goto freeTemps;
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}
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} else if (os.pOD->fOptState & OPTST_ARG_OPTIONAL) {
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switch (mayHandleArg( pOpts, pzArg+2, &os, ppzOpts, &optsIdx )) {
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case FAILURE: errno = EIO; goto freeTemps;
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case PROBLEM: errno = 0; goto joinLists;
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}
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} else {
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switch (mustHandleArg( pOpts, pzArg+2, &os, ppzOpts, &optsIdx )) {
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case PROBLEM:
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case FAILURE: errno = EIO; goto freeTemps;
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}
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}
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} /* for (;;) */
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restOperands:
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while (pOpts->curOptIdx < pOpts->origArgCt)
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ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
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joinLists:
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if (optsIdx > 0)
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memcpy( pOpts->origArgVect + 1, ppzOpts, optsIdx * sizeof( char* ));
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if (opdsIdx > 0)
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memcpy( pOpts->origArgVect + 1 + optsIdx,
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ppzOpds, opdsIdx * sizeof( char* ));
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freeTemps:
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free( ppzOpts );
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free( ppzOpds );
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return;
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exit_no_mem:
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errno = ENOMEM;
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return;
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}
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/*
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* Local Variables:
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* mode: C
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* c-file-style: "stroustrup"
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* indent-tabs-mode: nil
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* End:
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* end of autoopts/sort.c */
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