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| -rw-r--r-- | include/apr_getopt.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/include/apr_getopt.h b/include/apr_getopt.h new file mode 100644 index 0000000..75ad566 --- /dev/null +++ b/include/apr_getopt.h @@ -0,0 +1,160 @@ +/* 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 + * @{ + */ + +/** + * An @c apr_getopt_t error callback function. + * + * @a arg is this @c apr_getopt_t's @c errarg member. + */ +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 3 and 4 are most commonly argc and argv from main(argc, argv) + * The (*os)->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 */ |