diff -r 92e482410453 -r d345541018fa src/ucx/string.h --- a/src/ucx/string.h Mon Dec 30 09:54:10 2019 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1201 +0,0 @@ -/* - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. - * - * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ -/** - * Bounded string implementation. - * - * The UCX strings (sstr_t) provide an alternative to C strings. - * The main difference to C strings is, that sstr_t does not - * need to be NULL-terminated. Instead the length is stored - * within the structure. - * - * When using sstr_t, developers must be full aware of what type - * of string (NULL-terminated) or not) they are using, when - * accessing the char* ptr directly. - * - * The UCX string module provides some common string functions, known from - * standard libc, working with sstr_t. - * - * @file string.h - * @author Mike Becker - * @author Olaf Wintermann - */ - -#ifndef UCX_STRING_H -#define UCX_STRING_H - -#include "ucx.h" -#include "allocator.h" -#include - -/* - * Use this macro to disable the shortcuts if you experience macro collision. - */ -#ifndef UCX_NO_SSTR_SHORTCUTS -/** - * Shortcut for a sstr_t struct - * or scstr_t struct literal. - */ -#define ST(s) { s, sizeof(s)-1 } - -/** Shortcut for the conversion of a C string to a sstr_t. */ -#define S(s) sstrn(s, sizeof(s)-1) - -/** Shortcut for the conversion of a C string to a scstr_t. */ -#define SC(s) scstrn(s, sizeof(s)-1) -#endif /* UCX_NO_SSTR_SHORTCUTS */ - -/* - * Use this macro to disable the format macros. - */ -#ifndef UCX_NO_SSTR_FORMAT_MACROS -/** Expands a sstr_t or scstr_t to printf arguments. */ -#define SFMT(s) (int) (s).length, (s).ptr - -/** Format specifier for a sstr_t or scstr_t. */ -#define PRIsstr ".*s" -#endif /* UCX_NO_SSTR_FORMAT_MACROS */ - -#ifdef __cplusplus -extern "C" { -#endif - -/** - * The UCX string structure. - */ -typedef struct { - /** A pointer to the string - * (not necessarily NULL-terminated) */ - char *ptr; - /** The length of the string */ - size_t length; -} sstr_t; - -/** - * The UCX string structure for immutable (constant) strings. - */ -typedef struct { - /** A constant pointer to the immutable string - * (not necessarily NULL-terminated) */ - const char *ptr; - /** The length of the string */ - size_t length; -} scstr_t; - -#ifdef __cplusplus -} -#endif - - -#ifdef __cplusplus -/** - * One of two type adjustment functions that return an scstr_t. - * - * Used internally to convert a UCX string to an immutable UCX string. - * - * Do not use this function manually. - * - * @param str some sstr_t - * @return an immutable (scstr_t) version of the provided string. - */ -inline scstr_t s2scstr(sstr_t s) { - scstr_t c; - c.ptr = s.ptr; - c.length = s.length; - return c; -} - -/** - * One of two type adjustment functions that return an scstr_t. - * - * Used internally to convert a UCX string to an immutable UCX string. - * This variant is used, when the string is already immutable and no operation - * needs to be performed. - * - * Do not use this function manually. - * - * @param str some scstr_t - * @return the argument itself - */ -inline scstr_t s2scstr(scstr_t str) { - return str; -} - -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * @param str some UCX string - * @return an immutable version of the provided string - */ -#define SCSTR(s) s2scstr(s) -#else - -/** - * One of two type adjustment functions that return an scstr_t. - * - * Used internally to convert a UCX string to an immutable UCX string. - * This variant is used, when the string is already immutable and no operation - * needs to be performed. - * - * Do not use this function manually. - * - * @param str some scstr_t - * @return the argument itself - */ -scstr_t ucx_sc2sc(scstr_t str); - -/** - * One of two type adjustment functions that return an scstr_t. - * - * Used internally to convert a UCX string to an immutable UCX string. - * - * Do not use this function manually. - * - * @param str some sstr_t - * @return an immutable (scstr_t) version of the provided string. - */ -scstr_t ucx_ss2sc(sstr_t str); - -#if __STDC_VERSION__ >= 201112L -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * @param str some UCX string - * @return an immutable version of the provided string - */ -#define SCSTR(str) _Generic(str, sstr_t: ucx_ss2sc, scstr_t: ucx_sc2sc)(str) - -#elif defined(__GNUC__) || defined(__clang__) - -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * @param str some UCX string - * @return an immutable version of the provided string - */ -#define SCSTR(str) __builtin_choose_expr( \ - __builtin_types_compatible_p(typeof(str), sstr_t), \ - ucx_ss2sc, \ - ucx_sc2sc)(str) - -#elif defined(__sun) - -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * @param str some UCX string - * @return the an immutable version of the provided string - */ -#define SCSTR(str) ({typeof(str) ucx_tmp_var_str = str; \ - scstr_t ucx_tmp_var_c; \ - ucx_tmp_var_c.ptr = ucx_tmp_var_str.ptr;\ - ucx_tmp_var_c.length = ucx_tmp_var_str.length;\ - ucx_tmp_var_c; }) -#else /* no generics and no builtins */ - -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * - * This internal function (ab)uses the C standard an expects one single - * argument which is then implicitly converted to scstr_t without a warning. - * - * Do not use this function manually. - * - * @return the an immutable version of the provided string - */ -scstr_t ucx_ss2c_s(); - -/** - * Converts a UCX string to an immutable UCX string (scstr_t). - * @param str some UCX string - * @return the an immutable version of the provided string - */ -#define SCSTR(str) ucx_ss2c_s(str) -#endif /* C11 feature test */ - -#endif /* C++ */ - -#ifdef __cplusplus -extern "C" { -#endif - - -/** - * Creates a new sstr_t based on a C string. - * - * The length is implicitly inferred by using a call to strlen(). - * - * Note: the sstr_t will share the specified pointer to the C string. - * If you do want a copy, use sstrdup() on the return value of this function. - * - * If you need to wrap a constant string, use scstr(). - * - * @param cstring the C string to wrap - * @return a new sstr_t containing the C string - * - * @see sstrn() - */ -sstr_t sstr(char *cstring); - -/** - * Creates a new sstr_t of the specified length based on a C string. - * - * Note: the sstr_t will share the specified pointer to the C string. - * If you do want a copy, use sstrdup() on the return value of this function. - * - * If you need to wrap a constant string, use scstrn(). - * - * @param cstring the C string to wrap - * @param length the length of the string - * @return a new sstr_t containing the C string - * - * @see sstr() - * @see S() - */ -sstr_t sstrn(char *cstring, size_t length); - -/** - * Creates a new scstr_t based on a constant C string. - * - * The length is implicitly inferred by using a call to strlen(). - * - * Note: the scstr_t will share the specified pointer to the C string. - * If you do want a copy, use scstrdup() on the return value of this function. - * - * @param cstring the C string to wrap - * @return a new scstr_t containing the C string - * - * @see scstrn() - */ -scstr_t scstr(const char *cstring); - - -/** - * Creates a new scstr_t of the specified length based on a constant C string. - * - * Note: the scstr_t will share the specified pointer to the C string. - * If you do want a copy, use scstrdup() on the return value of this function. * - * - * @param cstring the C string to wrap - * @param length the length of the string - * @return a new scstr_t containing the C string - * - * @see scstr() - */ -scstr_t scstrn(const char *cstring, size_t length); - -/** - * Returns the accumulated length of all specified strings. - * - * Attention: if the count argument is larger than the count of the - * specified strings, the behavior is undefined. - * - * @param count the total number of specified strings - * @param ... all strings - * @return the accumulated length of all strings - */ -size_t scstrnlen(size_t count, ...); - -/** - * Returns the accumulated length of all specified strings. - * - * Attention: if the count argument is larger than the count of the - * specified strings, the behavior is undefined. - * - * @param count the total number of specified strings - * @param ... all strings - * @return the cumulated length of all strings - */ -#define sstrnlen(count, ...) scstrnlen(count, __VA_ARGS__) - -/** - * Concatenates two or more strings. - * - * The resulting string will be allocated by standard malloc(). - * So developers MUST pass the sstr_t.ptr to free(). - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated. - * - * @param count the total number of strings to concatenate - * @param s1 first string - * @param ... all remaining strings - * @return the concatenated string - */ -sstr_t scstrcat(size_t count, scstr_t s1, ...); - -/** - * Concatenates two or more strings. - * - * The resulting string will be allocated by standard malloc(). - * So developers MUST pass the sstr_t.ptr to free(). - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated. - * - * @param count the total number of strings to concatenate - * @param s1 first string - * @param ... all remaining strings - * @return the concatenated string - */ -#define sstrcat(count, s1, ...) scstrcat(count, SCSTR(s1), __VA_ARGS__) - -/** - * Concatenates two or more strings using a UcxAllocator. - * - * The resulting string must be freed by the allocators free() - * implementation. - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated. - * - * @param alloc the allocator to use - * @param count the total number of strings to concatenate - * @param s1 first string - * @param ... all remaining strings - * @return the concatenated string - * - * @see scstrcat() - */ -sstr_t scstrcat_a(UcxAllocator *alloc, size_t count, scstr_t s1, ...); - -/** - * Concatenates two or more strings using a UcxAllocator. - * - * The resulting string must be freed by the allocators free() - * implementation. - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated. - * - * @param alloc the allocator to use - * @param count the total number of strings to concatenate - * @param s1 first string - * @param ... all remaining strings - * @return the concatenated string - * - * @see sstrcat() - */ -#define sstrcat_a(alloc, count, s1, ...) \ - scstrcat_a(alloc, count, SCSTR(s1), __VA_ARGS__) - -/** - * Returns a substring starting at the specified location. - * - * Attention: the new string references the same memory area as the - * input string and is NOT required to be NULL-terminated. - * Use sstrdup() to get a copy. - * - * @param string input string - * @param start start location of the substring - * @return a substring of string starting at start - * - * @see sstrsubsl() - * @see sstrchr() - */ -sstr_t sstrsubs(sstr_t string, size_t start); - -/** - * Returns a substring with the given length starting at the specified location. - * - * Attention: the new string references the same memory area as the - * input string and is NOT required to be NULL-terminated. - * Use sstrdup() to get a copy. - * - * @param string input string - * @param start start location of the substring - * @param length the maximum length of the substring - * @return a substring of string starting at start - * with a maximum length of length - * - * @see sstrsubs() - * @see sstrchr() - */ -sstr_t sstrsubsl(sstr_t string, size_t start, size_t length); - -/** - * Returns a substring of an immutable string starting at the specified - * location. - * - * Attention: the new string references the same memory area as the -* input string and is NOT required to be NULL-terminated. - * Use scstrdup() to get a copy. - * - * @param string input string - * @param start start location of the substring - * @return a substring of string starting at start - * - * @see scstrsubsl() - * @see scstrchr() - */ -scstr_t scstrsubs(scstr_t string, size_t start); - -/** - * Returns a substring of an immutable string with a maximum length starting - * at the specified location. - * - * Attention: the new string references the same memory area as the - * input string and is NOT required to be NULL-terminated. - * Use scstrdup() to get a copy. - * - * @param string input string - * @param start start location of the substring - * @param length the maximum length of the substring - * @return a substring of string starting at start - * with a maximum length of length - * - * @see scstrsubs() - * @see scstrchr() - */ -scstr_t scstrsubsl(scstr_t string, size_t start, size_t length); - -/** - * Returns a substring starting at the location of the first occurrence of the - * specified character. - * - * If the string does not contain the character, an empty string is returned. - * - * @param string the string where to locate the character - * @param chr the character to locate - * @return a substring starting at the first location of chr - * - * @see sstrsubs() - */ -sstr_t sstrchr(sstr_t string, int chr); - -/** - * Returns a substring starting at the location of the last occurrence of the - * specified character. - * - * If the string does not contain the character, an empty string is returned. - * - * @param string the string where to locate the character - * @param chr the character to locate - * @return a substring starting at the last location of chr - * - * @see sstrsubs() - */ -sstr_t sstrrchr(sstr_t string, int chr); - -/** - * Returns an immutable substring starting at the location of the first - * occurrence of the specified character. - * - * If the string does not contain the character, an empty string is returned. - * - * @param string the string where to locate the character - * @param chr the character to locate - * @return a substring starting at the first location of chr - * - * @see scstrsubs() - */ -scstr_t scstrchr(scstr_t string, int chr); - -/** - * Returns an immutable substring starting at the location of the last - * occurrence of the specified character. - * - * If the string does not contain the character, an empty string is returned. - * - * @param string the string where to locate the character - * @param chr the character to locate - * @return a substring starting at the last location of chr - * - * @see scstrsubs() - */ -scstr_t scstrrchr(scstr_t string, int chr); - -/** - * Returns a substring starting at the location of the first occurrence of the - * specified string. - * - * If the string does not contain the other string, an empty string is returned. - * - * If match is an empty string, the complete string is - * returned. - * - * @param string the string to be scanned - * @param match string containing the sequence of characters to match - * @return a substring starting at the first occurrence of - * match, or an empty string, if the sequence is not - * present in string - */ -sstr_t scstrsstr(sstr_t string, scstr_t match); - -/** - * Returns a substring starting at the location of the first occurrence of the - * specified string. - * - * If the string does not contain the other string, an empty string is returned. - * - * If match is an empty string, the complete string is - * returned. - * - * @param string the string to be scanned - * @param match string containing the sequence of characters to match - * @return a substring starting at the first occurrence of - * match, or an empty string, if the sequence is not - * present in string - */ -#define sstrstr(string, match) scstrsstr(string, SCSTR(match)) - -/** - * Returns an immutable substring starting at the location of the - * first occurrence of the specified immutable string. - * - * If the string does not contain the other string, an empty string is returned. - * - * If match is an empty string, the complete string is - * returned. - * - * @param string the string to be scanned - * @param match string containing the sequence of characters to match - * @return a substring starting at the first occurrence of - * match, or an empty string, if the sequence is not - * present in string - */ -scstr_t scstrscstr(scstr_t string, scstr_t match); - -/** - * Returns an immutable substring starting at the location of the - * first occurrence of the specified immutable string. - * - * If the string does not contain the other string, an empty string is returned. - * - * If match is an empty string, the complete string is - * returned. - * - * @param string the string to be scanned - * @param match string containing the sequence of characters to match - * @return a substring starting at the first occurrence of - * match, or an empty string, if the sequence is not - * present in string - */ -#define sstrscstr(string, match) scstrscstr(string, SCSTR(match)) - -/** - * Splits a string into parts by using a delimiter string. - * - * This function will return NULL, if one of the following happens: - * - * - * The integer referenced by count is used as input and determines - * the maximum size of the resulting array, i.e. the maximum count of splits to - * perform + 1. - * - * The integer referenced by count is also used as output and is - * set to - * - * - * If the string starts with the delimiter, the first item of the resulting - * array will be an empty string. - * - * If the string ends with the delimiter and the maximum list size is not - * exceeded, the last array item will be an empty string. - * In case the list size would be exceeded, the last array item will be the - * remaining string after the last split, including the terminating - * delimiter. - * - * Attention: The array pointer AND all sstr_t.ptr of the array - * items must be manually passed to free(). Use scstrsplit_a() with - * an allocator to managed memory, to avoid this. - * - * @param string the string to split - * @param delim the delimiter string - * @param count IN: the maximum size of the resulting array (0 = no limit), - * OUT: the actual size of the array - * @return a sstr_t array containing the split strings or - * NULL on error - * - * @see scstrsplit_a() - */ -sstr_t* scstrsplit(scstr_t string, scstr_t delim, ssize_t *count); - -/** - * Splits a string into parts by using a delimiter string. - * - * This function will return NULL, if one of the following happens: - * - * - * The integer referenced by count is used as input and determines - * the maximum size of the resulting array, i.e. the maximum count of splits to - * perform + 1. - * - * The integer referenced by count is also used as output and is - * set to - * - * - * If the string starts with the delimiter, the first item of the resulting - * array will be an empty string. - * - * If the string ends with the delimiter and the maximum list size is not - * exceeded, the last array item will be an empty string. - * In case the list size would be exceeded, the last array item will be the - * remaining string after the last split, including the terminating - * delimiter. - * - * Attention: The array pointer AND all sstr_t.ptr of the array - * items must be manually passed to free(). Use sstrsplit_a() with - * an allocator to managed memory, to avoid this. - * - * @param string the string to split - * @param delim the delimiter string - * @param count IN: the maximum size of the resulting array (0 = no limit), - * OUT: the actual size of the array - * @return a sstr_t array containing the split strings or - * NULL on error - * - * @see sstrsplit_a() - */ -#define sstrsplit(string, delim, count) \ - scstrsplit(SCSTR(string), SCSTR(delim), count) - -/** - * Performing scstrsplit() using a UcxAllocator. - * - * Read the description of scstrsplit() for details. - * - * The memory for the sstr_t.ptr pointers of the array items and the memory for - * the sstr_t array itself are allocated by using the UcxAllocator.malloc() - * function. - * - * @param allocator the UcxAllocator used for allocating memory - * @param string the string to split - * @param delim the delimiter string - * @param count IN: the maximum size of the resulting array (0 = no limit), - * OUT: the actual size of the array - * @return a sstr_t array containing the split strings or - * NULL on error - * - * @see scstrsplit() - */ -sstr_t* scstrsplit_a(UcxAllocator *allocator, scstr_t string, scstr_t delim, - ssize_t *count); - -/** - * Performing sstrsplit() using a UcxAllocator. - * - * Read the description of sstrsplit() for details. - * - * The memory for the sstr_t.ptr pointers of the array items and the memory for - * the sstr_t array itself are allocated by using the UcxAllocator.malloc() - * function. - * - * @param allocator the UcxAllocator used for allocating memory - * @param string the string to split - * @param delim the delimiter string - * @param count IN: the maximum size of the resulting array (0 = no limit), - * OUT: the actual size of the array - * @return a sstr_t array containing the split strings or - * NULL on error - * - * @see sstrsplit() - */ -#define sstrsplit_a(allocator, string, delim, count) \ - scstrsplit_a(allocator, SCSTR(string), SCSTR(delim), count) - -/** - * Compares two UCX strings with standard memcmp(). - * - * At first it compares the scstr_t.length attribute of the two strings. The - * memcmp() function is called, if and only if the lengths match. - * - * @param s1 the first string - * @param s2 the second string - * @return -1, if the length of s1 is less than the length of s2 or 1, if the - * length of s1 is greater than the length of s2 or the result of - * memcmp() otherwise (i.e. 0 if the strings match) - */ -int scstrcmp(scstr_t s1, scstr_t s2); - -/** - * Compares two UCX strings with standard memcmp(). - * - * At first it compares the sstr_t.length attribute of the two strings. The - * memcmp() function is called, if and only if the lengths match. - * - * @param s1 the first string - * @param s2 the second string - * @return -1, if the length of s1 is less than the length of s2 or 1, if the - * length of s1 is greater than the length of s2 or the result of - * memcmp() otherwise (i.e. 0 if the strings match) - */ -#define sstrcmp(s1, s2) scstrcmp(SCSTR(s1), SCSTR(s2)) - -/** - * Compares two UCX strings ignoring the case. - * - * At first it compares the scstr_t.length attribute of the two strings. If and - * only if the lengths match, both strings are compared char by char ignoring - * the case. - * - * @param s1 the first string - * @param s2 the second string - * @return -1, if the length of s1 is less than the length of s2 or 1, if the - * length of s1 is greater than the length of s2 or the result of the platform - * specific string comparison function ignoring the case. - */ -int scstrcasecmp(scstr_t s1, scstr_t s2); - -/** - * Compares two UCX strings ignoring the case. - * - * At first it compares the sstr_t.length attribute of the two strings. If and - * only if the lengths match, both strings are compared char by char ignoring - * the case. - * - * @param s1 the first string - * @param s2 the second string - * @return -1, if the length of s1 is less than the length of s2 or 1, if the - * length of s1 is greater than the length of s2 or the result of the platform - * specific string comparison function ignoring the case. - */ -#define sstrcasecmp(s1, s2) scstrcasecmp(SCSTR(s1), SCSTR(s2)) - -/** - * Creates a duplicate of the specified string. - * - * The new sstr_t will contain a copy allocated by standard - * malloc(). So developers MUST pass the sstr_t.ptr to - * free(). - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated and mutable, regardless of the argument. - * - * @param string the string to duplicate - * @return a duplicate of the string - * @see scstrdup_a() - */ -sstr_t scstrdup(scstr_t string); - -/** - * Creates a duplicate of the specified string. - * - * The new sstr_t will contain a copy allocated by standard - * malloc(). So developers MUST pass the sstr_t.ptr to - * free(). - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated, regardless of the argument. - * - * @param string the string to duplicate - * @return a duplicate of the string - * @see sstrdup_a() - */ -#define sstrdup(string) scstrdup(SCSTR(string)) - -/** - * Creates a duplicate of the specified string using a UcxAllocator. - * - * The new sstr_t will contain a copy allocated by the allocators - * UcxAllocator.malloc() function. So it is implementation depended, whether the - * returned sstr_t.ptr pointer must be passed to the allocators - * UcxAllocator.free() function manually. - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated and mutable, regardless of the argument. - * - * @param allocator a valid instance of a UcxAllocator - * @param string the string to duplicate - * @return a duplicate of the string - * @see scstrdup() - */ -sstr_t scstrdup_a(UcxAllocator *allocator, scstr_t string); - -/** - * Creates a duplicate of the specified string using a UcxAllocator. - * - * The new sstr_t will contain a copy allocated by the allocators - * UcxAllocator.malloc() function. So it is implementation depended, whether the - * returned sstr_t.ptr pointer must be passed to the allocators - * UcxAllocator.free() function manually. - * - * The sstr_t.ptr of the return value will always be NULL- - * terminated, regardless of the argument. - * - * @param allocator a valid instance of a UcxAllocator - * @param string the string to duplicate - * @return a duplicate of the string - * @see scstrdup() - */ -#define sstrdup_a(allocator, string) scstrdup_a(allocator, SCSTR(string)) - - -/** - * Omits leading and trailing spaces. - * - * This function returns a new sstr_t containing a trimmed version of the - * specified string. - * - * Note: the new sstr_t references the same memory, thus you - * MUST NOT pass the sstr_t.ptr of the return value to - * free(). It is also highly recommended to avoid assignments like - * mystr = sstrtrim(mystr); as you lose the reference to the - * source string. Assignments of this type are only permitted, if the - * sstr_t.ptr of the source string does not need to be freed or if another - * reference to the source string exists. - * - * @param string the string that shall be trimmed - * @return a new sstr_t containing the trimmed string - */ -sstr_t sstrtrim(sstr_t string); - -/** - * Omits leading and trailing spaces. - * - * This function returns a new scstr_t containing a trimmed version of the - * specified string. - * - * Note: the new scstr_t references the same memory, thus you - * MUST NOT pass the scstr_t.ptr of the return value to - * free(). It is also highly recommended to avoid assignments like - * mystr = scstrtrim(mystr); as you lose the reference to the - * source string. Assignments of this type are only permitted, if the - * scstr_t.ptr of the source string does not need to be freed or if another - * reference to the source string exists. - * - * @param string the string that shall be trimmed - * @return a new scstr_t containing the trimmed string - */ -scstr_t scstrtrim(scstr_t string); - -/** - * Checks, if a string has a specific prefix. - * - * @param string the string to check - * @param prefix the prefix the string should have - * @return 1, if and only if the string has the specified prefix, 0 otherwise - */ -int scstrprefix(scstr_t string, scstr_t prefix); - -/** - * Checks, if a string has a specific prefix. - * - * @param string the string to check - * @param prefix the prefix the string should have - * @return 1, if and only if the string has the specified prefix, 0 otherwise - */ -#define sstrprefix(string, prefix) scstrprefix(SCSTR(string), SCSTR(prefix)) - -/** - * Checks, if a string has a specific suffix. - * - * @param string the string to check - * @param suffix the suffix the string should have - * @return 1, if and only if the string has the specified suffix, 0 otherwise - */ -int scstrsuffix(scstr_t string, scstr_t suffix); - -/** - * Checks, if a string has a specific suffix. - * - * @param string the string to check - * @param suffix the suffix the string should have - * @return 1, if and only if the string has the specified suffix, 0 otherwise - */ -#define sstrsuffix(string, suffix) scstrsuffix(SCSTR(string), SCSTR(suffix)) - -/** - * Checks, if a string has a specific prefix, ignoring the case. - * - * @param string the string to check - * @param prefix the prefix the string should have - * @return 1, if and only if the string has the specified prefix, 0 otherwise - */ -int scstrcaseprefix(scstr_t string, scstr_t prefix); - -/** - * Checks, if a string has a specific prefix, ignoring the case. - * - * @param string the string to check - * @param prefix the prefix the string should have - * @return 1, if and only if the string has the specified prefix, 0 otherwise - */ -#define sstrcaseprefix(string, prefix) \ - scstrcaseprefix(SCSTR(string), SCSTR(prefix)) - -/** - * Checks, if a string has a specific suffix, ignoring the case. - * - * @param string the string to check - * @param suffix the suffix the string should have - * @return 1, if and only if the string has the specified suffix, 0 otherwise - */ -int scstrcasesuffix(scstr_t string, scstr_t suffix); - -/** - * Checks, if a string has a specific suffix, ignoring the case. - * - * @param string the string to check - * @param suffix the suffix the string should have - * @return 1, if and only if the string has the specified suffix, 0 otherwise - */ -#define sstrcasesuffix(string, suffix) \ - scstrcasesuffix(SCSTR(string), SCSTR(suffix)) - -/** - * Returns a lower case version of a string. - * - * This function creates a duplicate of the input string, first - * (see scstrdup()). - * - * @param string the input string - * @return the resulting lower case string - * @see scstrdup() - */ -sstr_t scstrlower(scstr_t string); - -/** - * Returns a lower case version of a string. - * - * This function creates a duplicate of the input string, first - * (see sstrdup()). - * - * @param string the input string - * @return the resulting lower case string - */ -#define sstrlower(string) scstrlower(SCSTR(string)) - -/** - * Returns a lower case version of a string. - * - * This function creates a duplicate of the input string, first - * (see scstrdup_a()). - * - * @param allocator the allocator used for duplicating the string - * @param string the input string - * @return the resulting lower case string - * @see scstrdup_a() - */ -sstr_t scstrlower_a(UcxAllocator *allocator, scstr_t string); - - -/** - * Returns a lower case version of a string. - * - * This function creates a duplicate of the input string, first - * (see sstrdup_a()). - * - * @param allocator the allocator used for duplicating the string - * @param string the input string - * @return the resulting lower case string - */ -#define sstrlower_a(allocator, string) scstrlower_a(allocator, SCSTR(string)) - -/** - * Returns a upper case version of a string. - * - * This function creates a duplicate of the input string, first - * (see scstrdup()). - * - * @param string the input string - * @return the resulting upper case string - * @see scstrdup() - */ -sstr_t scstrupper(scstr_t string); - -/** - * Returns a upper case version of a string. - * - * This function creates a duplicate of the input string, first - * (see sstrdup()). - * - * @param string the input string - * @return the resulting upper case string - */ -#define sstrupper(string) scstrupper(SCSTR(string)) - -/** - * Returns a upper case version of a string. - * - * This function creates a duplicate of the input string, first - * (see scstrdup_a()). - * - * @param allocator the allocator used for duplicating the string - * @param string the input string - * @return the resulting upper case string - * @see scstrdup_a() - */ -sstr_t scstrupper_a(UcxAllocator *allocator, scstr_t string); - -/** - * Returns a upper case version of a string. - * - * This function creates a duplicate of the input string, first - * (see sstrdup_a()). - * - * @param allocator the allocator used for duplicating the string - * @param string the input string - * @return the resulting upper case string - */ -#define sstrupper_a(allocator, string) scstrupper_a(allocator, string) - - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The resulting string is allocated by the specified allocator. I.e. it - * depends on the used allocator, whether the sstr_t.ptr must be freed - * manually. - * - * If allocation fails, the sstr_t.ptr of the return value is NULL. - * - * @param allocator the allocator to use - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @param replmax maximum number of replacements - * @return the resulting string after applying the replacements - */ -sstr_t scstrreplacen_a(UcxAllocator *allocator, scstr_t str, - scstr_t pattern, scstr_t replacement, size_t replmax); - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The sstr_t.ptr of the resulting string must be freed manually. - * - * If allocation fails, the sstr_t.ptr of the return value is NULL. - * - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @param replmax maximum number of replacements - * @return the resulting string after applying the replacements - */ -sstr_t scstrreplacen(scstr_t str, scstr_t pattern, - scstr_t replacement, size_t replmax); - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The resulting string is allocated by the specified allocator. I.e. it - * depends on the used allocator, whether the sstr_t.ptr must be freed - * manually. - * - * @param allocator the allocator to use - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @param replmax maximum number of replacements - * @return the resulting string after applying the replacements - */ -#define sstrreplacen_a(allocator, str, pattern, replacement, replmax) \ - scstrreplacen_a(allocator, SCSTR(str), SCSTR(pattern), \ - SCSTR(replacement), replmax) - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The sstr_t.ptr of the resulting string must be freed manually. - * - * If allocation fails, the sstr_t.ptr of the return value is NULL. - * - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @param replmax maximum number of replacements - * @return the resulting string after applying the replacements - */ -#define sstrreplacen(str, pattern, replacement, replmax) \ - scstrreplacen(SCSTR(str), SCSTR(pattern), SCSTR(replacement), replmax) - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The resulting string is allocated by the specified allocator. I.e. it - * depends on the used allocator, whether the sstr_t.ptr must be freed - * manually. - * - * If allocation fails, the sstr_t.ptr of the return value is NULL. - * - * @param allocator the allocator to use - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @return the resulting string after applying the replacements - */ -#define sstrreplace_a(allocator, str, pattern, replacement) \ - scstrreplacen_a(allocator, SCSTR(str), SCSTR(pattern), \ - SCSTR(replacement), SIZE_MAX) - -/** - * Replaces a pattern in a string with another string. - * - * The pattern is taken literally and is no regular expression. - * Replaces at most replmax occurrences. - * - * The sstr_t.ptr of the resulting string must be freed manually. - * - * If allocation fails, the sstr_t.ptr of the return value is NULL. - * - * @param str the string where replacements should be applied - * @param pattern the pattern to search for - * @param replacement the replacement string - * @return the resulting string after applying the replacements - */ -#define sstrreplace(str, pattern, replacement) \ - scstrreplacen(SCSTR(str), SCSTR(pattern), SCSTR(replacement), SIZE_MAX) - -#ifdef __cplusplus -} -#endif - -#endif /* UCX_STRING_H */