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-rw-r--r--nsprpub/lib/libc/src/plgetopt.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/nsprpub/lib/libc/src/plgetopt.c b/nsprpub/lib/libc/src/plgetopt.c
new file mode 100644
index 0000000000..4e37e65f51
--- /dev/null
+++ b/nsprpub/lib/libc/src/plgetopt.c
@@ -0,0 +1,251 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+** File: plgetopt.c
+** Description: utilities to parse argc/argv
+*/
+
+#include "prmem.h"
+#include "prlog.h"
+#include "prerror.h"
+#include "plstr.h"
+#include "plgetopt.h"
+
+#include <string.h>
+
+static char static_Nul = 0;
+
+struct PLOptionInternal
+{
+ const char *options; /* client options list specification */
+ PRIntn argc; /* original number of arguments */
+ char **argv; /* vector of pointers to arguments */
+ PRIntn xargc; /* which one we're processing now */
+ const char *xargv; /* where within *argv[xargc] */
+ PRIntn minus; /* do we already have the '-'? */
+ const PLLongOpt *longOpts; /* Caller's array */
+ PRBool endOfOpts; /* have reached a "--" argument */
+ PRIntn optionsLen; /* is strlen(options) */
+};
+
+/*
+** Create the state in which to parse the tokens.
+**
+** argc the sum of the number of options and their values
+** argv the options and their values
+** options vector of single character options w/ | w/o ':
+*/
+PR_IMPLEMENT(PLOptState*) PL_CreateOptState(
+ PRIntn argc, char **argv, const char *options)
+{
+ return PL_CreateLongOptState( argc, argv, options, NULL);
+} /* PL_CreateOptState */
+
+PR_IMPLEMENT(PLOptState*) PL_CreateLongOptState(
+ PRIntn argc, char **argv, const char *options,
+ const PLLongOpt *longOpts)
+{
+ PLOptState *opt = NULL;
+ PLOptionInternal *internal;
+
+ if (NULL == options)
+ {
+ PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+ return opt;
+ }
+
+ opt = PR_NEWZAP(PLOptState);
+ if (NULL == opt)
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return opt;
+ }
+
+ internal = PR_NEW(PLOptionInternal);
+ if (NULL == internal)
+ {
+ PR_DELETE(opt);
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ return NULL;
+ }
+
+ opt->option = 0;
+ opt->value = NULL;
+ opt->internal = internal;
+ opt->longOption = 0;
+ opt->longOptIndex = -1;
+
+ internal->argc = argc;
+ internal->argv = argv;
+ internal->xargc = 0;
+ internal->xargv = &static_Nul;
+ internal->minus = 0;
+ internal->options = options;
+ internal->longOpts = longOpts;
+ internal->endOfOpts = PR_FALSE;
+ internal->optionsLen = PL_strlen(options);
+
+ return opt;
+} /* PL_CreateLongOptState */
+
+/*
+** Destroy object created by CreateOptState()
+*/
+PR_IMPLEMENT(void) PL_DestroyOptState(PLOptState *opt)
+{
+ PR_DELETE(opt->internal);
+ PR_DELETE(opt);
+} /* PL_DestroyOptState */
+
+PR_IMPLEMENT(PLOptStatus) PL_GetNextOpt(PLOptState *opt)
+{
+ PLOptionInternal *internal = opt->internal;
+
+ opt->longOption = 0;
+ opt->longOptIndex = -1;
+ /*
+ ** If the current xarg points to nul, advance to the next
+ ** element of the argv vector. If the vector index is equal
+ ** to argc, we're out of arguments, so return an EOL.
+ ** Note whether the first character of the new argument is
+ ** a '-' and skip by it if it is.
+ */
+ while (0 == *internal->xargv)
+ {
+ internal->xargc += 1;
+ if (internal->xargc >= internal->argc)
+ {
+ opt->option = 0;
+ opt->value = NULL;
+ return PL_OPT_EOL;
+ }
+ internal->xargv = internal->argv[internal->xargc];
+ internal->minus = 0;
+ if (!internal->endOfOpts && ('-' == *internal->xargv))
+ {
+ internal->minus++;
+ internal->xargv++; /* and consume */
+ if ('-' == *internal->xargv && internal->longOpts)
+ {
+ internal->minus++;
+ internal->xargv++;
+ if (0 == *internal->xargv)
+ {
+ internal->endOfOpts = PR_TRUE;
+ }
+ }
+ }
+ }
+
+ /*
+ ** If we already have a '-' or '--' in hand, xargv points to the next
+ ** option. See if we can find a match in the list of possible
+ ** options supplied.
+ */
+ if (internal->minus == 2)
+ {
+ char * foundEqual = strchr(internal->xargv,'=');
+ PRIntn optNameLen = foundEqual ? (foundEqual - internal->xargv) :
+ strlen(internal->xargv);
+ const PLLongOpt *longOpt = internal->longOpts;
+ PLOptStatus result = PL_OPT_BAD;
+
+ opt->option = 0;
+ opt->value = NULL;
+
+ for (; longOpt->longOptName; ++longOpt)
+ {
+ if (strncmp(longOpt->longOptName, internal->xargv, optNameLen)) {
+ continue; /* not a possible match */
+ }
+ if (strlen(longOpt->longOptName) != optNameLen) {
+ continue; /* not a match */
+ }
+ /* option name match */
+ opt->longOptIndex = longOpt - internal->longOpts;
+ opt->longOption = longOpt->longOption;
+ /* value is part of the current argv[] element if = was found */
+ /* note: this sets value even for long options that do not
+ * require option if specified as --long=value */
+ if (foundEqual)
+ {
+ opt->value = foundEqual + 1;
+ }
+ else if (longOpt->valueRequired)
+ {
+ /* value is the next argv[] element, if any */
+ if (internal->xargc + 1 < internal->argc)
+ {
+ opt->value = internal->argv[++(internal->xargc)];
+ }
+ /* missing value */
+ else
+ {
+ break; /* return PL_OPT_BAD */
+ }
+ }
+ result = PL_OPT_OK;
+ break;
+ }
+ internal->xargv = &static_Nul; /* consume this */
+ return result;
+ }
+ if (internal->minus)
+ {
+ PRIntn cop;
+ PRIntn eoo = internal->optionsLen;
+ for (cop = 0; cop < eoo; ++cop)
+ {
+ if (internal->options[cop] == *internal->xargv)
+ {
+ opt->option = *internal->xargv++;
+ opt->longOption = opt->option & 0xff;
+ /*
+ ** if options indicates that there's an associated
+ ** value, it must be provided, either as part of this
+ ** argv[] element or as the next one
+ */
+ if (':' == internal->options[cop + 1])
+ {
+ /* value is part of the current argv[] element */
+ if (0 != *internal->xargv)
+ {
+ opt->value = internal->xargv;
+ }
+ /* value is the next argv[] element, if any */
+ else if (internal->xargc + 1 < internal->argc)
+ {
+ opt->value = internal->argv[++(internal->xargc)];
+ }
+ /* missing value */
+ else
+ {
+ return PL_OPT_BAD;
+ }
+
+ internal->xargv = &static_Nul;
+ internal->minus = 0;
+ }
+ else {
+ opt->value = NULL;
+ }
+ return PL_OPT_OK;
+ }
+ }
+ internal->xargv += 1; /* consume that option */
+ return PL_OPT_BAD;
+ }
+
+ /*
+ ** No '-', so it must be a standalone value. The option is nul.
+ */
+ opt->value = internal->argv[internal->xargc];
+ internal->xargv = &static_Nul;
+ opt->option = 0;
+ return PL_OPT_OK;
+} /* PL_GetNextOpt */
+
+/* plgetopt.c */
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