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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
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* 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.
* ====================================================================
*/
/**
* @file apr_cstr.h
* @brief C string goodies.
*/
#ifndef APR_CSTR_H
#define APR_CSTR_H
#include <apr.h> /* for apr_size_t */
#include <apr_pools.h> /* for apr_pool_t */
#include <apr_tables.h> /* for apr_array_header_t */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup apr_cstr C (POSIX) locale string functions
* @ingroup apr_strings
*
* The apr_cstr_* functions provide traditional C char * string text handling,
* and notabilty they treat all text in the C (a.k.a. POSIX) locale using the
* minimal POSIX character set, represented in either ASCII or a corresponding
* EBCDIC subset.
*
* Character values outside of that set are treated as opaque bytes, and all
* multi-byte character sequences are handled as individual distinct octets.
*
* Multi-byte characters sequences whose octets fall in the ASCII range cause
* unexpected results, such as in the ISO-2022-JP code page where ASCII octets
* occur within both shift-state and multibyte sequences.
*
* In the case of the UTF-8 encoding, all multibyte characters all fall outside
* of the C/POSIX range of characters, so these functions are generally safe
* to use on UTF-8 strings. The programmer must be aware that each octet may
* not represent a distinct printable character in such encodings.
*
* The standard C99/POSIX string functions, rather than apr_cstr, should be
* used in all cases where the current locale and encoding of the text is
* significant.
* @{
*/
/** Divide @a input into substrings, interpreting any char from @a sep
* as a token separator.
*
* Return an array of copies of those substrings (plain const char*),
* allocating both the array and the copies in @a pool.
*
* None of the elements added to the array contain any of the
* characters in @a sep_chars, and none of the new elements are empty
* (thus, it is possible that the returned array will have length
* zero).
*
* If @a chop_whitespace is TRUE, then remove leading and trailing
* whitespace from the returned strings.
*
* @since New in 1.6
*/
APR_DECLARE(apr_array_header_t *) apr_cstr_split(const char *input,
const char *sep_chars,
int chop_whitespace,
apr_pool_t *pool);
/** Like apr_cstr_split(), but append to existing @a array instead of
* creating a new one. Allocate the copied substrings in @a pool
* (i.e., caller decides whether or not to pass @a array->pool as @a pool).
*
* @since New in 1.6
*/
APR_DECLARE(void) apr_cstr_split_append(apr_array_header_t *array,
const char *input,
const char *sep_chars,
int chop_whitespace,
apr_pool_t *pool);
/** Return @c TRUE iff @a str matches any of the elements of @a list, a list
* of zero or more glob patterns.
*
* @since New in 1.6
*/
APR_DECLARE(int) apr_cstr_match_glob_list(const char *str,
const apr_array_header_t *list);
/** Return @c TRUE iff @a str exactly matches any of the elements of @a list.
*
* @since New in 1.6
*/
APR_DECLARE(int) apr_cstr_match_list(const char *str,
const apr_array_header_t *list);
/**
* Get the next token from @a *str interpreting any char from @a sep as a
* token separator. Separators at the beginning of @a str will be skipped.
* Returns a pointer to the beginning of the first token in @a *str or NULL
* if no token is left. Modifies @a str such that the next call will return
* the next token.
*
* @note The content of @a *str may be modified by this function.
*
* @since New in 1.6.
*/
APR_DECLARE(char *) apr_cstr_tokenize(const char *sep, char **str);
/**
* Return the number of line breaks in @a msg, allowing any kind of newline
* termination (CR, LF, CRLF, or LFCR), even inconsistent.
*
* @since New in 1.6.
*/
APR_DECLARE(int) apr_cstr_count_newlines(const char *msg);
#if 0 /* XXX: stringbuf logic is not present in APR */
/**
* Return a cstring which is the concatenation of @a strings (an array
* of char *) each followed by @a separator (that is, @a separator
* will also end the resulting string). Allocate the result in @a pool.
* If @a strings is empty, then return the empty string.
*
* @since New in 1.6.
*/
APR_DECLARE(char *) apr_cstr_join(const apr_array_header_t *strings,
const char *separator,
apr_pool_t *pool);
#endif
/**
* Perform a case-insensitive comparison of two strings @a atr1 and @a atr2,
* treating upper and lower case values of the 26 standard C/POSIX alphabetic
* characters as equivalent. Extended latin characters outside of this set
* are treated as unique octets, irrespective of the current locale.
*
* Returns in integer greater than, equal to, or less than 0,
* according to whether @a str1 is considered greater than, equal to,
* or less than @a str2.
*
* @since New in 1.6.
*/
APR_DECLARE(int) apr_cstr_casecmp(const char *str1, const char *str2);
/**
* Perform a case-insensitive comparison of two strings @a atr1 and @a atr2,
* treating upper and lower case values of the 26 standard C/POSIX alphabetic
* characters as equivalent. Extended latin characters outside of this set
* are treated as unique octets, irrespective of the current locale.
*
* Returns in integer greater than, equal to, or less than 0,
* according to whether @a str1 is considered greater than, equal to,
* or less than @a str2.
*
* @since New in 1.6.
*/
APR_DECLARE(int) apr_cstr_casecmpn(const char *str1,
const char *str2,
apr_size_t n);
/**
* Parse the C string @a str into a 64 bit number, and return it in @a *n.
* Assume that the number is represented in base @a base.
* Raise an error if conversion fails (e.g. due to overflow), or if the
* converted number is smaller than @a minval or larger than @a maxval.
*
* Leading whitespace in @a str is skipped in a locale-dependent way.
* After that, the string may contain an optional '+' (positive, default)
* or '-' (negative) character, followed by an optional '0x' prefix if
* @a base is 0 or 16, followed by numeric digits appropriate for the base.
* If there are any more characters after the numeric digits, an error is
* returned.
*
* If @a base is zero, then a leading '0x' or '0X' prefix means hexadecimal,
* else a leading '0' means octal (implemented, though not documented, in
* apr_strtoi64() in APR 0.9.0 through 1.5.0), else use base ten.
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_strtoi64(apr_int64_t *n, const char *str,
apr_int64_t minval,
apr_int64_t maxval,
int base);
/**
* Parse the C string @a str into a 64 bit number, and return it in @a *n.
* Assume that the number is represented in base 10.
* Raise an error if conversion fails (e.g. due to overflow).
*
* The behaviour otherwise is as described for apr_cstr_strtoi64().
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_atoi64(apr_int64_t *n, const char *str);
/**
* Parse the C string @a str into a 32 bit number, and return it in @a *n.
* Assume that the number is represented in base 10.
* Raise an error if conversion fails (e.g. due to overflow).
*
* The behaviour otherwise is as described for apr_cstr_strtoi64().
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_atoi(int *n, const char *str);
/**
* Parse the C string @a str into an unsigned 64 bit number, and return
* it in @a *n. Assume that the number is represented in base @a base.
* Raise an error if conversion fails (e.g. due to overflow), or if the
* converted number is smaller than @a minval or larger than @a maxval.
*
* Leading whitespace in @a str is skipped in a locale-dependent way.
* After that, the string may contain an optional '+' (positive, default)
* or '-' (negative) character, followed by an optional '0x' prefix if
* @a base is 0 or 16, followed by numeric digits appropriate for the base.
* If there are any more characters after the numeric digits, an error is
* returned.
*
* If @a base is zero, then a leading '0x' or '0X' prefix means hexadecimal,
* else a leading '0' means octal (as implemented, though not documented, in
* apr_strtoi64(), else use base ten.
*
* @warning The implementation returns APR_ERANGE if the parsed number
* is greater than APR_INT64_MAX, even if it is not greater than @a maxval.
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_strtoui64(apr_uint64_t *n, const char *str,
apr_uint64_t minval,
apr_uint64_t maxval,
int base);
/**
* Parse the C string @a str into an unsigned 64 bit number, and return
* it in @a *n. Assume that the number is represented in base 10.
* Raise an error if conversion fails (e.g. due to overflow).
*
* The behaviour otherwise is as described for apr_cstr_strtoui64(),
* including the upper limit of APR_INT64_MAX.
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_atoui64(apr_uint64_t *n, const char *str);
/**
* Parse the C string @a str into an unsigned 32 bit number, and return
* it in @a *n. Assume that the number is represented in base 10.
* Raise an error if conversion fails (e.g. due to overflow).
*
* The behaviour otherwise is as described for apr_cstr_strtoui64(),
* including the upper limit of APR_INT64_MAX.
*
* @since New in 1.6.
*/
APR_DECLARE(apr_status_t) apr_cstr_atoui(unsigned int *n, const char *str);
/**
* Skip the common prefix @a prefix from the C string @a str, and return
* a pointer to the next character after the prefix.
* Return @c NULL if @a str does not start with @a prefix.
*
* @since New in 1.6.
*/
APR_DECLARE(const char *) apr_cstr_skip_prefix(const char *str,
const char *prefix);
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* SVN_STRING_H */