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-rw-r--r--autoopts/sort.c336
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+
+/*
+ * \file sort.c
+ *
+ * Time-stamp: "2011-05-24 18:07:14 bkorb"
+ *
+ * This module implements argument sorting.
+ *
+ * This file is part of AutoOpts, a companion to AutoGen.
+ * AutoOpts is free software.
+ * AutoOpts is Copyright (c) 1992-2012 by Bruce Korb - all rights reserved
+ *
+ * AutoOpts is available under any one of two licenses. The license
+ * in use must be one of these two and the choice is under the control
+ * of the user of the license.
+ *
+ * The GNU Lesser General Public License, version 3 or later
+ * See the files "COPYING.lgplv3" and "COPYING.gplv3"
+ *
+ * The Modified Berkeley Software Distribution License
+ * See the file "COPYING.mbsd"
+ *
+ * These files have the following md5sums:
+ *
+ * 43b91e8ca915626ed3818ffb1b71248b pkg/libopts/COPYING.gplv3
+ * 06a1a2e4760c90ea5e1dad8dfaac4d39 pkg/libopts/COPYING.lgplv3
+ * 66a5cedaf62c4b2637025f049f9b826f pkg/libopts/COPYING.mbsd
+ */
+
+/* = = = START-STATIC-FORWARD = = = */
+static tSuccess
+mustHandleArg(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx);
+
+static tSuccess
+mayHandleArg(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx);
+
+static tSuccess
+checkShortOpts(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx);
+/* = = = END-STATIC-FORWARD = = = */
+
+/*
+ * "mustHandleArg" and "mayHandleArg" are really similar. The biggest
+ * difference is that "may" will consume the next argument only if it
+ * does not start with a hyphen and "must" will consume it, hyphen or not.
+ */
+static tSuccess
+mustHandleArg(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx)
+{
+ /*
+ * An option argument is required. Long options can either have
+ * a separate command line argument, or an argument attached by
+ * the '=' character. Figure out which.
+ */
+ switch (pOS->optType) {
+ case TOPT_SHORT:
+ /*
+ * See if an arg string follows the flag character. If not,
+ * the next arg must be the option argument.
+ */
+ if (*pzArg != NUL)
+ return SUCCESS;
+ break;
+
+ case TOPT_LONG:
+ /*
+ * See if an arg string has already been assigned (glued on
+ * with an `=' character). If not, the next is the opt arg.
+ */
+ if (pOS->pzOptArg != NULL)
+ return SUCCESS;
+ break;
+
+ default:
+ return FAILURE;
+ }
+ if (pOpts->curOptIdx >= pOpts->origArgCt)
+ return FAILURE;
+
+ ppzOpts[ (*pOptsIdx)++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ return SUCCESS;
+}
+
+static tSuccess
+mayHandleArg(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx)
+{
+ /*
+ * An option argument is optional.
+ */
+ switch (pOS->optType) {
+ case TOPT_SHORT:
+ /*
+ * IF nothing is glued on after the current flag character,
+ * THEN see if there is another argument. If so and if it
+ * does *NOT* start with a hyphen, then it is the option arg.
+ */
+ if (*pzArg != NUL)
+ return SUCCESS;
+ break;
+
+ case TOPT_LONG:
+ /*
+ * Look for an argument if we don't already have one (glued on
+ * with a `=' character)
+ */
+ if (pOS->pzOptArg != NULL)
+ return SUCCESS;
+ break;
+
+ default:
+ return FAILURE;
+ }
+ if (pOpts->curOptIdx >= pOpts->origArgCt)
+ return PROBLEM;
+
+ pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
+ if (*pzArg != '-')
+ ppzOpts[ (*pOptsIdx)++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ return SUCCESS;
+}
+
+/*
+ * Process a string of short options glued together. If the last one
+ * does or may take an argument, the do the argument processing and leave.
+ */
+static tSuccess
+checkShortOpts(tOptions* pOpts, char* pzArg, tOptState* pOS,
+ char** ppzOpts, int* pOptsIdx)
+{
+ while (*pzArg != NUL) {
+ if (FAILED(opt_find_short(pOpts, (tAoUC)*pzArg, pOS)))
+ return FAILURE;
+
+ /*
+ * See if we can have an arg.
+ */
+ if (OPTST_GET_ARGTYPE(pOS->pOD->fOptState) == OPARG_TYPE_NONE) {
+ pzArg++;
+
+ } else if (pOS->pOD->fOptState & OPTST_ARG_OPTIONAL) {
+ /*
+ * Take an argument if it is not attached and it does not
+ * start with a hyphen.
+ */
+ if (pzArg[1] != NUL)
+ return SUCCESS;
+
+ pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
+ if (*pzArg != '-')
+ ppzOpts[ (*pOptsIdx)++ ] =
+ pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ return SUCCESS;
+
+ } else {
+ /*
+ * IF we need another argument, be sure it is there and
+ * take it.
+ */
+ if (pzArg[1] == NUL) {
+ if (pOpts->curOptIdx >= pOpts->origArgCt)
+ return FAILURE;
+ ppzOpts[ (*pOptsIdx)++ ] =
+ pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ }
+ return SUCCESS;
+ }
+ }
+ return SUCCESS;
+}
+
+/*
+ * If the program wants sorted options (separated operands and options),
+ * then this routine will to the trick.
+ */
+LOCAL void
+optionSort(tOptions* pOpts)
+{
+ char** ppzOpts;
+ char** ppzOpds;
+ int optsIdx = 0;
+ int opdsIdx = 0;
+
+ tOptState os = OPTSTATE_INITIALIZER(DEFINED);
+
+ /*
+ * Disable for POSIX conformance, or if there are no operands.
+ */
+ if ( (getenv("POSIXLY_CORRECT") != NULL)
+ || NAMED_OPTS(pOpts))
+ return;
+
+ /*
+ * Make sure we can allocate two full-sized arg vectors.
+ */
+ ppzOpts = malloc(pOpts->origArgCt * sizeof(char*));
+ if (ppzOpts == NULL)
+ goto exit_no_mem;
+
+ ppzOpds = malloc(pOpts->origArgCt * sizeof(char*));
+ if (ppzOpds == NULL) {
+ free(ppzOpts);
+ goto exit_no_mem;
+ }
+
+ pOpts->curOptIdx = 1;
+ pOpts->pzCurOpt = NULL;
+
+ /*
+ * Now, process all the options from our current position onward.
+ * (This allows interspersed options and arguments for the few
+ * non-standard programs that require it.)
+ */
+ for (;;) {
+ char* pzArg;
+ tSuccess res;
+
+ /*
+ * If we're out of arguments, we're done. Join the option and
+ * operand lists into the original argument vector.
+ */
+ if (pOpts->curOptIdx >= pOpts->origArgCt) {
+ errno = 0;
+ goto joinLists;
+ }
+
+ pzArg = pOpts->origArgVect[ pOpts->curOptIdx ];
+ if (*pzArg != '-') {
+ ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ continue;
+ }
+
+ switch (pzArg[1]) {
+ case NUL:
+ /*
+ * A single hyphen is an operand.
+ */
+ ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ continue;
+
+ case '-':
+ /*
+ * Two consecutive hypens. Put them on the options list and then
+ * _always_ force the remainder of the arguments to be operands.
+ */
+ if (pzArg[2] == NUL) {
+ ppzOpts[ optsIdx++ ] =
+ pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+ goto restOperands;
+ }
+ res = opt_find_long(pOpts, pzArg+2, &os);
+ break;
+
+ default:
+ /*
+ * If short options are not allowed, then do long
+ * option processing. Otherwise the character must be a
+ * short (i.e. single character) option.
+ */
+ if ((pOpts->fOptSet & OPTPROC_SHORTOPT) == 0) {
+ res = opt_find_long(pOpts, pzArg+1, &os);
+ } else {
+ res = opt_find_short(pOpts, (tAoUC)pzArg[1], &os);
+ }
+ break;
+ }
+ if (FAILED(res)) {
+ errno = EINVAL;
+ goto freeTemps;
+ }
+
+ /*
+ * We've found an option. Add the argument to the option list.
+ * Next, we have to see if we need to pull another argument to be
+ * used as the option argument.
+ */
+ ppzOpts[ optsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+
+ if (OPTST_GET_ARGTYPE(os.pOD->fOptState) == OPARG_TYPE_NONE) {
+ /*
+ * No option argument. If we have a short option here,
+ * then scan for short options until we get to the end
+ * of the argument string.
+ */
+ if ( (os.optType == TOPT_SHORT)
+ && FAILED(checkShortOpts(pOpts, pzArg+2, &os, ppzOpts,
+ &optsIdx)) ) {
+ errno = EINVAL;
+ goto freeTemps;
+ }
+
+ } else if (os.pOD->fOptState & OPTST_ARG_OPTIONAL) {
+ switch (mayHandleArg(pOpts, pzArg+2, &os, ppzOpts, &optsIdx)) {
+ case FAILURE: errno = EIO; goto freeTemps;
+ case PROBLEM: errno = 0; goto joinLists;
+ }
+
+ } else {
+ switch (mustHandleArg(pOpts, pzArg+2, &os, ppzOpts, &optsIdx)) {
+ case PROBLEM:
+ case FAILURE: errno = EIO; goto freeTemps;
+ }
+ }
+ } /* for (;;) */
+
+ restOperands:
+ while (pOpts->curOptIdx < pOpts->origArgCt)
+ ppzOpds[ opdsIdx++ ] = pOpts->origArgVect[ (pOpts->curOptIdx)++ ];
+
+ joinLists:
+ if (optsIdx > 0)
+ memcpy(pOpts->origArgVect + 1, ppzOpts, optsIdx * sizeof(char*));
+ if (opdsIdx > 0)
+ memcpy(pOpts->origArgVect + 1 + optsIdx, ppzOpds,
+ opdsIdx * sizeof(char*));
+
+ freeTemps:
+ free(ppzOpts);
+ free(ppzOpds);
+ return;
+
+ exit_no_mem:
+ errno = ENOMEM;
+ return;
+}
+
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of autoopts/sort.c */
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