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| -rw-r--r-- | include/apr_cstr.h | 292 |
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diff --git a/include/apr_cstr.h b/include/apr_cstr.h new file mode 100644 index 0000000..3f1b1a0 --- /dev/null +++ b/include/apr_cstr.h @@ -0,0 +1,292 @@ +/* ==================================================================== + * 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. + * ==================================================================== + */ + +/** + * @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 */ |