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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef APR_GETOPT_H
+#define APR_GETOPT_H
+
+/**
+ * @file apr_getopt.h
+ * @brief APR Command Arguments (getopt)
+ */
+
+#include "apr_pools.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup apr_getopt Command Argument Parsing
+ * @ingroup APR
+ * @{
+ */
+
+/**
+ * defintion of a error function
+ */
+typedef void (apr_getopt_err_fn_t)(void *arg, const char *err, ...);
+
+/** @see apr_getopt_t */
+typedef struct apr_getopt_t apr_getopt_t;
+
+/**
+ * Structure to store command line argument information.
+ */
+struct apr_getopt_t {
+ /** context for processing */
+ apr_pool_t *cont;
+ /** function to print error message (NULL == no messages) */
+ apr_getopt_err_fn_t *errfn;
+ /** user defined first arg to pass to error message */
+ void *errarg;
+ /** index into parent argv vector */
+ int ind;
+ /** character checked for validity */
+ int opt;
+ /** reset getopt */
+ int reset;
+ /** count of arguments */
+ int argc;
+ /** array of pointers to arguments */
+ const char **argv;
+ /** argument associated with option */
+ char const* place;
+ /** set to nonzero to support interleaving options with regular args */
+ int interleave;
+ /** start of non-option arguments skipped for interleaving */
+ int skip_start;
+ /** end of non-option arguments skipped for interleaving */
+ int skip_end;
+};
+
+/** @see apr_getopt_option_t */
+typedef struct apr_getopt_option_t apr_getopt_option_t;
+
+/**
+ * Structure used to describe options that getopt should search for.
+ */
+struct apr_getopt_option_t {
+ /** long option name, or NULL if option has no long name */
+ const char *name;
+ /** option letter, or a value greater than 255 if option has no letter */
+ int optch;
+ /** nonzero if option takes an argument */
+ int has_arg;
+ /** a description of the option */
+ const char *description;
+};
+
+/**
+ * Initialize the arguments for parsing by apr_getopt().
+ * @param os The options structure created for apr_getopt()
+ * @param cont The pool to operate on
+ * @param argc The number of arguments to parse
+ * @param argv The array of arguments to parse
+ * @remark Arguments 2 and 3 are most commonly argc and argv from main(argc, argv)
+ * The errfn is initialized to fprintf(stderr... but may be overridden.
+ */
+APR_DECLARE(apr_status_t) apr_getopt_init(apr_getopt_t **os, apr_pool_t *cont,
+ int argc, const char * const *argv);
+
+/**
+ * Parse the options initialized by apr_getopt_init().
+ * @param os The apr_opt_t structure returned by apr_getopt_init()
+ * @param opts A string of characters that are acceptable options to the
+ * program. Characters followed by ":" are required to have an
+ * option associated
+ * @param option_ch The next option character parsed
+ * @param option_arg The argument following the option character:
+ * @return There are four potential status values on exit. They are:
+ * <PRE>
+ * APR_EOF -- No more options to parse
+ * APR_BADCH -- Found a bad option character
+ * APR_BADARG -- No argument followed the option flag
+ * APR_SUCCESS -- The next option was found.
+ * </PRE>
+ */
+APR_DECLARE(apr_status_t) apr_getopt(apr_getopt_t *os, const char *opts,
+ char *option_ch, const char **option_arg);
+
+/**
+ * Parse the options initialized by apr_getopt_init(), accepting long
+ * options beginning with "--" in addition to single-character
+ * options beginning with "-".
+ * @param os The apr_getopt_t structure created by apr_getopt_init()
+ * @param opts A pointer to a list of apr_getopt_option_t structures, which
+ * can be initialized with { "name", optch, has_args }. has_args
+ * is nonzero if the option requires an argument. A structure
+ * with an optch value of 0 terminates the list.
+ * @param option_ch Receives the value of "optch" from the apr_getopt_option_t
+ * structure corresponding to the next option matched.
+ * @param option_arg Receives the argument following the option, if any.
+ * @return There are four potential status values on exit. They are:
+ * <PRE>
+ * APR_EOF -- No more options to parse
+ * APR_BADCH -- Found a bad option character
+ * APR_BADARG -- No argument followed the option flag
+ * APR_SUCCESS -- The next option was found.
+ * </PRE>
+ * When APR_SUCCESS is returned, os->ind gives the index of the first
+ * non-option argument. On error, a message will be printed to stdout unless
+ * os->err is set to 0. If os->interleave is set to nonzero, options can come
+ * after arguments, and os->argv will be permuted to leave non-option arguments
+ * at the end (the original argv is unaffected).
+ */
+APR_DECLARE(apr_status_t) apr_getopt_long(apr_getopt_t *os,
+ const apr_getopt_option_t *opts,
+ int *option_ch,
+ const char **option_arg);
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ! APR_GETOPT_H */