1
/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
4
* Licensed under the Apache License, Version 2.0 (the "License");
5
* you may not use this file except in compliance with the License.
6
* You may obtain a copy of the License at
8
* http://www.apache.org/licenses/LICENSE-2.0
10
* Unless required by applicable law or agreed to in writing, software
11
* distributed under the License is distributed on an "AS IS" BASIS,
12
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13
* See the License for the specific language governing permissions and
14
* limitations under the License.
22
* @brief APR Command Arguments (getopt)
25
#include "apr_pools.h"
29
#endif /* __cplusplus */
32
* @defgroup apr_getopt Command Argument Parsing
38
* defintion of a error function
40
typedef void (apr_getopt_err_fn_t)(void *arg, const char *err, ...);
42
/** @see apr_getopt_t */
43
typedef struct apr_getopt_t apr_getopt_t;
46
* Structure to store command line argument information.
49
/** context for processing */
51
/** function to print error message (NULL == no messages) */
52
apr_getopt_err_fn_t *errfn;
53
/** user defined first arg to pass to error message */
55
/** index into parent argv vector */
57
/** character checked for validity */
61
/** count of arguments */
63
/** array of pointers to arguments */
65
/** argument associated with option */
67
/** set to nonzero to support interleaving options with regular args */
69
/** start of non-option arguments skipped for interleaving */
71
/** end of non-option arguments skipped for interleaving */
75
/** @see apr_getopt_option_t */
76
typedef struct apr_getopt_option_t apr_getopt_option_t;
79
* Structure used to describe options that getopt should search for.
81
struct apr_getopt_option_t {
82
/** long option name, or NULL if option has no long name */
84
/** option letter, or a value greater than 255 if option has no letter */
86
/** nonzero if option takes an argument */
88
/** a description of the option */
89
const char *description;
93
* Initialize the arguments for parsing by apr_getopt().
94
* @param os The options structure created for apr_getopt()
95
* @param cont The pool to operate on
96
* @param argc The number of arguments to parse
97
* @param argv The array of arguments to parse
98
* @remark Arguments 2 and 3 are most commonly argc and argv from main(argc, argv)
99
* The errfn is initialized to fprintf(stderr... but may be overridden.
101
APR_DECLARE(apr_status_t) apr_getopt_init(apr_getopt_t **os, apr_pool_t *cont,
102
int argc, const char * const *argv);
105
* Parse the options initialized by apr_getopt_init().
106
* @param os The apr_opt_t structure returned by apr_getopt_init()
107
* @param opts A string of characters that are acceptable options to the
108
* program. Characters followed by ":" are required to have an
110
* @param option_ch The next option character parsed
111
* @param option_arg The argument following the option character:
112
* @return There are four potential status values on exit. They are:
114
* APR_EOF -- No more options to parse
115
* APR_BADCH -- Found a bad option character
116
* APR_BADARG -- No argument followed the option flag
117
* APR_SUCCESS -- The next option was found.
120
APR_DECLARE(apr_status_t) apr_getopt(apr_getopt_t *os, const char *opts,
121
char *option_ch, const char **option_arg);
124
* Parse the options initialized by apr_getopt_init(), accepting long
125
* options beginning with "--" in addition to single-character
126
* options beginning with "-".
127
* @param os The apr_getopt_t structure created by apr_getopt_init()
128
* @param opts A pointer to a list of apr_getopt_option_t structures, which
129
* can be initialized with { "name", optch, has_args }. has_args
130
* is nonzero if the option requires an argument. A structure
131
* with an optch value of 0 terminates the list.
132
* @param option_ch Receives the value of "optch" from the apr_getopt_option_t
133
* structure corresponding to the next option matched.
134
* @param option_arg Receives the argument following the option, if any.
135
* @return There are four potential status values on exit. They are:
137
* APR_EOF -- No more options to parse
138
* APR_BADCH -- Found a bad option character
139
* APR_BADARG -- No argument followed the option flag
140
* APR_SUCCESS -- The next option was found.
142
* When APR_SUCCESS is returned, os->ind gives the index of the first
143
* non-option argument. On error, a message will be printed to stdout unless
144
* os->err is set to 0. If os->interleave is set to nonzero, options can come
145
* after arguments, and os->argv will be permuted to leave non-option arguments
146
* at the end (the original argv is unaffected).
148
APR_DECLARE(apr_status_t) apr_getopt_long(apr_getopt_t *os,
149
const apr_getopt_option_t *opts,
151
const char **option_arg);
158
#endif /* ! APR_GETOPT_H */