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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_XLATE_H
#define APR_XLATE_H
#include "apu.h"
#include "apr_pools.h"
#include "apr_errno.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @file apr_xlate.h
* @brief APR I18N translation library
*/
/**
* @defgroup APR_XLATE I18N translation library
* @ingroup APR
* @{
*/
/** Opaque translation buffer */
typedef struct apr_xlate_t apr_xlate_t;
/**
* Set up for converting text from one charset to another.
* @param convset The handle to be filled in by this function
* @param topage The name of the target charset
* @param frompage The name of the source charset
* @param pool The pool to use
* @remark
* Specify APR_DEFAULT_CHARSET for one of the charset
* names to indicate the charset of the source code at
* compile time. This is useful if there are literal
* strings in the source code which must be translated
* according to the charset of the source code.
* APR_DEFAULT_CHARSET is not useful if the source code
* of the caller was not encoded in the same charset as
* APR at compile time.
*
* @remark
* Specify APR_LOCALE_CHARSET for one of the charset
* names to indicate the charset of the current locale.
*
* @remark
* Return APR_EINVAL if unable to procure a convset, or APR_ENOTIMPL
* if charset transcoding is not available in this instance of
* apr-util at all (i.e., APR_HAS_XLATE is undefined).
*/
APU_DECLARE(apr_status_t) apr_xlate_open(apr_xlate_t **convset,
const char *topage,
const char *frompage,
apr_pool_t *pool);
/**
* This is to indicate the charset of the sourcecode at compile time
* names to indicate the charset of the source code at
* compile time. This is useful if there are literal
* strings in the source code which must be translated
* according to the charset of the source code.
*/
#define APR_DEFAULT_CHARSET (const char *)0
/**
* To indicate charset names of the current locale
*/
#define APR_LOCALE_CHARSET (const char *)1
/**
* Find out whether or not the specified conversion is single-byte-only.
* @param convset The handle allocated by apr_xlate_open, specifying the
* parameters of conversion
* @param onoff Output: whether or not the conversion is single-byte-only
* @remark
* Return APR_ENOTIMPL if charset transcoding is not available
* in this instance of apr-util (i.e., APR_HAS_XLATE is undefined).
*/
APU_DECLARE(apr_status_t) apr_xlate_sb_get(apr_xlate_t *convset, int *onoff);
/**
* Convert a buffer of text from one codepage to another.
* @param convset The handle allocated by apr_xlate_open, specifying
* the parameters of conversion
* @param inbuf The address of the source buffer
* @param inbytes_left Input: the amount of input data to be translated
* Output: the amount of input data not yet translated
* @param outbuf The address of the destination buffer
* @param outbytes_left Input: the size of the output buffer
* Output: the amount of the output buffer not yet used
* @remark
* Returns APR_ENOTIMPL if charset transcoding is not available
* in this instance of apr-util (i.e., APR_HAS_XLATE is undefined).
* Returns APR_INCOMPLETE if the input buffer ends in an incomplete
* multi-byte character.
*
* To correctly terminate the output buffer for some multi-byte
* character set encodings, a final call must be made to this function
* after the complete input string has been converted, passing
* the inbuf and inbytes_left parameters as NULL. (Note that this
* mode only works from version 1.1.0 onwards)
*/
APU_DECLARE(apr_status_t) apr_xlate_conv_buffer(apr_xlate_t *convset,
const char *inbuf,
apr_size_t *inbytes_left,
char *outbuf,
apr_size_t *outbytes_left);
/* @see apr_file_io.h the comment in apr_file_io.h about this hack */
#ifdef APR_NOT_DONE_YET
/**
* The purpose of apr_xlate_conv_char is to translate one character
* at a time. This needs to be written carefully so that it works
* with double-byte character sets.
* @param convset The handle allocated by apr_xlate_open, specifying the
* parameters of conversion
* @param inchar The character to convert
* @param outchar The converted character
*/
APU_DECLARE(apr_status_t) apr_xlate_conv_char(apr_xlate_t *convset,
char inchar, char outchar);
#endif
/**
* Convert a single-byte character from one charset to another.
* @param convset The handle allocated by apr_xlate_open, specifying the
* parameters of conversion
* @param inchar The single-byte character to convert.
* @warning This only works when converting between single-byte character sets.
* -1 will be returned if the conversion can't be performed.
*/
APU_DECLARE(apr_int32_t) apr_xlate_conv_byte(apr_xlate_t *convset,
unsigned char inchar);
/**
* Close a codepage translation handle.
* @param convset The codepage translation handle to close
* @remark
* Return APR_ENOTIMPL if charset transcoding is not available
* in this instance of apr-util (i.e., APR_HAS_XLATE is undefined).
*/
APU_DECLARE(apr_status_t) apr_xlate_close(apr_xlate_t *convset);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* ! APR_XLATE_H */
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