diff options
Diffstat (limited to 'include/apr_xlate.h')
| -rw-r--r-- | include/apr_xlate.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/include/apr_xlate.h b/include/apr_xlate.h new file mode 100644 index 0000000..3263668 --- /dev/null +++ b/include/apr_xlate.h @@ -0,0 +1,163 @@ +/* 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 */ |