#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup apr_strings String routines
* @ingroup APR
* @{
*/
/**
* Do a natural order comparison of two strings.
* @param a The first string to compare
* @param b The second string to compare
* @return Either <0, 0, or >0. If the first string is less than the second
* this returns <0, if they are equivalent it returns 0, and if the
* first string is greater than second string it retuns >0.
*/
APR_DECLARE(int) apr_strnatcmp(char const *a, char const *b);
/**
* Do a natural order comparison of two strings ignoring the case of the
* strings.
* @param a The first string to compare
* @param b The second string to compare
* @return Either <0, 0, or >0. If the first string is less than the second
* this returns <0, if they are equivalent it returns 0, and if the
* first string is greater than second string it retuns >0.
*/
APR_DECLARE(int) apr_strnatcasecmp(char const *a, char const *b);
/**
* duplicate a string into memory allocated out of a pool
* @param p The pool to allocate out of
* @param s The string to duplicate
* @return The new string
*/
APR_DECLARE(char *) apr_pstrdup(apr_pool_t *p, const char *s);
/**
* Create a null-terminated string by making a copy of a sequence
* of characters and appending a null byte
* @param p The pool to allocate out of
* @param s The block of characters to duplicate
* @param n The number of characters to duplicate
* @return The new string
* @remark This is a faster alternative to apr_pstrndup, for use
* when you know that the string being duplicated really
* has 'n' or more characters. If the string might contain
* fewer characters, use apr_pstrndup.
*/
APR_DECLARE(char *) apr_pstrmemdup(apr_pool_t *p, const char *s, apr_size_t n);
/**
* Duplicate at most n characters of a string into memory allocated
* out of a pool; the new string will be NUL-terminated
* @param p The pool to allocate out of
* @param s The string to duplicate
* @param n The maximum number of characters to duplicate
* @return The new string
* @remark The amount of memory allocated from the pool is the length
* of the returned string including the NUL terminator
*/
APR_DECLARE(char *) apr_pstrndup(apr_pool_t *p, const char *s, apr_size_t n);
/**
* Duplicate a block of memory.
*
* @param p The pool to allocate from
* @param m The memory to duplicate
* @param n The number of bytes to duplicate
* @return The new block of memory
*/
APR_DECLARE(void *) apr_pmemdup(apr_pool_t *p, const void *m, apr_size_t n);
/**
* Concatenate multiple strings, allocating memory out a pool
* @param p The pool to allocate out of
* @param ... The strings to concatenate. The final string must be NULL
* @return The new string
*/
APR_DECLARE_NONSTD(char *) apr_pstrcat(apr_pool_t *p, ...);
/**
* Concatenate multiple strings specified in a writev-style vector
* @param p The pool from which to allocate
* @param vec The strings to concatenate
* @param nvec The number of strings to concatenate
* @param nbytes (output) strlen of new string (pass in NULL to omit)
* @return The new string
*/
APR_DECLARE(char *) apr_pstrcatv(apr_pool_t *p, const struct iovec *vec,
apr_size_t nvec, apr_size_t *nbytes);
/**
* printf-style style printing routine. The data is output to a string
* allocated from a pool
* @param p The pool to allocate out of
* @param fmt The format of the string
* @param ap The arguments to use while printing the data
* @return The new string
*/
APR_DECLARE(char *) apr_pvsprintf(apr_pool_t *p, const char *fmt, va_list ap);
/**
* printf-style style printing routine. The data is output to a string
* allocated from a pool
* @param p The pool to allocate out of
* @param fmt The format of the string
* @param ... The arguments to use while printing the data
* @return The new string
*/
APR_DECLARE_NONSTD(char *) apr_psprintf(apr_pool_t *p, const char *fmt, ...)
__attribute__((format(printf,2,3)));
/**
* Copy up to dst_size characters from src to dst; does not copy
* past a NUL terminator in src, but always terminates dst with a NUL
* regardless.
* @param dst The destination string
* @param src The source string
* @param dst_size The space available in dst; dst always receives
* NUL termination, so if src is longer than
* dst_size, the actual number of characters copied is
* dst_size - 1.
* @return Pointer to the NUL terminator of the destination string, dst
* @remark
*
* Note the differences between this function and strncpy():
* 1) strncpy() doesn't always NUL terminate; apr_cpystrn() does.
* 2) strncpy() pads the destination string with NULs, which is often
* unnecessary; apr_cpystrn() does not.
* 3) strncpy() returns a pointer to the beginning of the dst string;
* apr_cpystrn() returns a pointer to the NUL terminator of dst,
* to allow a check for truncation.
*
*/
APR_DECLARE(char *) apr_cpystrn(char *dst, const char *src,
apr_size_t dst_size);
/**
* Remove all whitespace from a string
* @param dest The destination string. It is okay to modify the string
* in place. Namely dest == src
* @param src The string to rid the spaces from.
* @return A pointer to the destination string's null terminator.
*/
APR_DECLARE(char *) apr_collapse_spaces(char *dest, const char *src);
/**
* Convert the arguments to a program from one string to an array of
* strings terminated by a NULL pointer
* @param arg_str The arguments to convert
* @param argv_out Output location. This is a pointer to an array of strings.
* @param token_context Pool to use.
*/
APR_DECLARE(apr_status_t) apr_tokenize_to_argv(const char *arg_str,
char ***argv_out,
apr_pool_t *token_context);
/**
* Split a string into separate null-terminated tokens. The tokens are
* delimited in the string by one or more characters from the sep
* argument.
* @param str The string to separate; this should be specified on the
* first call to apr_strtok() for a given string, and NULL
* on subsequent calls.
* @param sep The set of delimiters
* @param last Internal state saved by apr_strtok() between calls.
* @return The next token from the string
*/
APR_DECLARE(char *) apr_strtok(char *str, const char *sep, char **last);
/**
* @defgroup APR_Strings_Snprintf snprintf implementations
* @warning
* These are snprintf implementations based on apr_vformatter().
*
* Note that various standards and implementations disagree on the return
* value of snprintf, and side-effects due to %n in the formatting string.
* apr_snprintf (and apr_vsnprintf) behaves as follows:
*
* Process the format string until the entire string is exhausted, or
* the buffer fills. If the buffer fills then stop processing immediately
* (so no further %n arguments are processed), and return the buffer
* length. In all cases the buffer is NUL terminated. It will return the
* number of characters inserted into the buffer, not including the
* terminating NUL. As a special case, if len is 0, apr_snprintf will
* return the number of characters that would have been inserted if
* the buffer had been infinite (in this case, *buffer can be NULL)
*
* In no event does apr_snprintf return a negative number.
* @{
*/
/**
* snprintf routine based on apr_vformatter. This means it understands the
* same extensions.
* @param buf The buffer to write to
* @param len The size of the buffer
* @param format The format string
* @param ... The arguments to use to fill out the format string.
*/
APR_DECLARE_NONSTD(int) apr_snprintf(char *buf, apr_size_t len,
const char *format, ...)
__attribute__((format(printf,3,4)));
/**
* vsnprintf routine based on apr_vformatter. This means it understands the
* same extensions.
* @param buf The buffer to write to
* @param len The size of the buffer
* @param format The format string
* @param ap The arguments to use to fill out the format string.
*/
APR_DECLARE(int) apr_vsnprintf(char *buf, apr_size_t len, const char *format,
va_list ap);
/** @} */
/**
* create a string representation of an int, allocated from a pool
* @param p The pool from which to allocate
* @param n The number to format
* @return The string representation of the number
*/
APR_DECLARE(char *) apr_itoa(apr_pool_t *p, int n);
/**
* create a string representation of a long, allocated from a pool
* @param p The pool from which to allocate
* @param n The number to format
* @return The string representation of the number
*/
APR_DECLARE(char *) apr_ltoa(apr_pool_t *p, long n);
/**
* create a string representation of an apr_off_t, allocated from a pool
* @param p The pool from which to allocate
* @param n The number to format
* @return The string representation of the number
*/
APR_DECLARE(char *) apr_off_t_toa(apr_pool_t *p, apr_off_t n);
/**
* Convert a numeric string into an apr_off_t numeric value.
* @param offset The value of the parsed string.
* @param buf The string to parse. It may contain optional whitespace,
* followed by an optional '+' (positive, default) or '-' (negative)
* character, followed by an optional '0x' prefix if base is 0 or 16,
* followed by numeric digits appropriate for base.
* @param end A pointer to the end of the valid character in buf. If
* not NULL, it is set to the first invalid character in buf.
* @param base A numeric base in the range between 2 and 36 inclusive,
* or 0. If base is zero, buf will be treated as base ten unless its
* digits are prefixed with '0x', in which case it will be treated as
* base 16.
* @bug *end breaks type safety; where *buf is const, *end needs to be
* declared as const in APR 2.0
*/
APR_DECLARE(apr_status_t) apr_strtoff(apr_off_t *offset, const char *buf,
char **end, int base);
/**
* parse a numeric string into a 64-bit numeric value
* @param buf The string to parse. It may contain optional whitespace,
* followed by an optional '+' (positive, default) or '-' (negative)
* character, followed by an optional '0x' prefix if base is 0 or 16,
* followed by numeric digits appropriate for base.
* @param end A pointer to the end of the valid character in buf. If
* not NULL, it is set to the first invalid character in buf.
* @param base A numeric base in the range between 2 and 36 inclusive,
* or 0. If base is zero, buf will be treated as base ten unless its
* digits are prefixed with '0x', in which case it will be treated as
* base 16.
* @return The numeric value of the string. On overflow, errno is set
* to ERANGE.
*/
APR_DECLARE(apr_int64_t) apr_strtoi64(const char *buf, char **end, int base);
/**
* parse a base-10 numeric string into a 64-bit numeric value.
* Equivalent to apr_strtoi64(buf, (char**)NULL, 10).
* @param buf The string to parse
* @return The numeric value of the string
*/
APR_DECLARE(apr_int64_t) apr_atoi64(const char *buf);
/**
* Format a binary size (magnitiudes are 2^10 rather than 10^3) from an apr_off_t,
* as bytes, K, M, T, etc, to a four character compacted human readable string.
* @param size The size to format
* @param buf The 5 byte text buffer (counting the trailing null)
* @return The buf passed to apr_strfsize()
* @remark All negative sizes report ' - ', apr_strfsize only formats positive values.
*/
APR_DECLARE(char *) apr_strfsize(apr_off_t size, char *buf);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* !APR_STRINGS_H */