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/**
 * @copyright
 * ====================================================================
 *    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.
 * ====================================================================
 * @endcopyright
 *
 * @file svn_cmdline.h
 * @brief Support functions for command line programs
 */




#ifndef SVN_CMDLINE_H
#define SVN_CMDLINE_H

#include <apr_pools.h>
#include <apr_getopt.h>

#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define APR_WANT_STDIO
#endif
#include <apr_want.h>

#include "svn_types.h"
#include "svn_auth.h"
#include "svn_config.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */


/** Set up the locale for character conversion, and initialize APR.
 * If @a error_stream is non-NULL, print error messages to the stream,
 * using @a progname as the program name.  Attempt to set @c stdout to
 * line-buffered mode, and @a error_stream to unbuffered mode.  Return
 * @c EXIT_SUCCESS if successful, otherwise @c EXIT_FAILURE.
 *
 * @note This function should be called exactly once at program startup,
 *       before calling any other APR or Subversion functions.
 */
int
svn_cmdline_init(const char *progname,
                 FILE *error_stream);


/** Set @a *dest to an output-encoded C string from UTF-8 C string @a
 * src; allocate @a *dest in @a pool.
 */
svn_error_t *
svn_cmdline_cstring_from_utf8(const char **dest,
                              const char *src,
                              apr_pool_t *pool);

/** Like svn_utf_cstring_from_utf8_fuzzy(), but converts to an
 * output-encoded C string. */
const char *
svn_cmdline_cstring_from_utf8_fuzzy(const char *src,
                                    apr_pool_t *pool);

/** Set @a *dest to a UTF-8-encoded C string from input-encoded C
 * string @a src; allocate @a *dest in @a pool.
 */
svn_error_t *
svn_cmdline_cstring_to_utf8(const char **dest,
                            const char *src,
                            apr_pool_t *pool);

/** Set @a *dest to an output-encoded natively-formatted path string
 * from canonical path @a src; allocate @a *dest in @a pool.
 */
svn_error_t *
svn_cmdline_path_local_style_from_utf8(const char **dest,
                                       const char *src,
                                       apr_pool_t *pool);

/** Write to stdout, using a printf-like format string @a fmt, passed
 * through apr_pvsprintf().  All string arguments are in UTF-8; the output
 * is converted to the output encoding.  Use @a pool for temporary
 * allocation.
 *
 * @since New in 1.1.
 */
svn_error_t *
svn_cmdline_printf(apr_pool_t *pool,
                   const char *fmt,
                   ...)
       __attribute__((format(printf, 2, 3)));

/** Write to the stdio @a stream, using a printf-like format string @a fmt,
 * passed through apr_pvsprintf().  All string arguments are in UTF-8;
 * the output is converted to the output encoding.  Use @a pool for
 * temporary allocation.
 *
 * @since New in 1.1.
 */
svn_error_t *
svn_cmdline_fprintf(FILE *stream,
                    apr_pool_t *pool,
                    const char *fmt,
                    ...)
       __attribute__((format(printf, 3, 4)));

/** Output the @a string to the stdio @a stream, converting from UTF-8
 * to the output encoding.  Use @a pool for temporary allocation.
 *
 * @since New in 1.1.
 */
svn_error_t *
svn_cmdline_fputs(const char *string,
                  FILE *stream,
                  apr_pool_t *pool);

/** Flush output buffers of the stdio @a stream, returning an error if that
 * fails.  This is just a wrapper for the standard fflush() function for
 * consistent error handling.
 *
 * @since New in 1.1.
 */
svn_error_t *
svn_cmdline_fflush(FILE *stream);

/** Return the name of the output encoding allocated in @a pool, or @c
 * APR_LOCALE_CHARSET if the output encoding is the same as the locale
 * encoding.
 *
 * @since New in 1.3.
 */
const char *
svn_cmdline_output_encoding(apr_pool_t *pool);

/** Handle @a error in preparation for immediate exit from a
 * command-line client.  Specifically:
 *
 * Call svn_handle_error2(@a error, stderr, FALSE, @a prefix), clear
 * @a error, destroy @a pool iff it is non-NULL, and return EXIT_FAILURE.
 *
 * @since New in 1.3.
 */
int
svn_cmdline_handle_exit_error(svn_error_t *error,
                              apr_pool_t *pool,
                              const char *prefix);

/** A prompt function/baton pair, and the path to the configuration
 * directory. To be passed as the baton argument to the
 * @c svn_cmdline_*_prompt functions.
 *
 * @since New in 1.6.
 */
typedef struct svn_cmdline_prompt_baton2_t {
  svn_cancel_func_t cancel_func;
  void *cancel_baton;
  const char *config_dir;
} svn_cmdline_prompt_baton2_t;

/** Like svn_cmdline_prompt_baton2_t, but without the path to the
 * configuration directory.
 *
 * @since New in 1.4.
 * @deprecated Provided for backward compatibility with the 1.5 API.
 */
typedef struct svn_cmdline_prompt_baton_t {
  svn_cancel_func_t cancel_func;
  void *cancel_baton;
} svn_cmdline_prompt_baton_t;

/** Prompt the user for input, using @a prompt_str for the prompt and
 * @a baton (which may be @c NULL) for cancellation, and returning the
 * user's response in @a result, allocated in @a pool.
 *
 * @since New in 1.5.
 */
svn_error_t *
svn_cmdline_prompt_user2(const char **result,
                         const char *prompt_str,
                         svn_cmdline_prompt_baton_t *baton,
                         apr_pool_t *pool);

/** Similar to svn_cmdline_prompt_user2, but without cancellation
 * support.
 *
 * @deprecated Provided for backward compatibility with the 1.4 API.
 */