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/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <wchar.h>
#include <stdint.h>
#include <unistd.h>
#include <alloca.h>
#include <wctype.h>
#define WIDE
# pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
/**
* This function is identical to `wcsstr`.
*/
wchar_t* wcswcs(const wchar_t* haystack, const wchar_t* needle)
{
return wcsstr(haystack, needle);
}
/**
* Finds the first occurrence of a substring.
* This search is case sensitive.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @return Pointer to the first occurrence of the
* substring, `NULL` if not found.
*/
wchar_t* wcsstr(const wchar_t* haystack, const wchar_t* needle)
{
return wmemmem(haystack, wcslen(haystack), needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case insensitive.
*
* This is a slibc extension.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @return Pointer to the first occurrence of the
* substring, `NULL` if not found.
*/
wchar_t* wcscasestr(const wchar_t* haystack, const wchar_t* needle)
{
return wmemcasemem(haystack, wcslen(haystack), needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case sensitive.
*
* This is a slibc extension added for because it was useful
* in implementing slibc itself.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @param maxlen The maximum number of character to search.
* @return Pointer to the first occurrence of the
* substring, `NULL` if not found.
*/
wchar_t* wcsnstr(const wchar_t* haystack, const wchar_t* needle, size_t maxlen)
{
return wmemmem(haystack, wcsnlen(haystack, maxlen), needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case insensitive.
*
* This is a slibc extension added for completeness.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @param maxlen The maximum number of character to search.
* @return Pointer to the first occurrence of the
* substring, `NULL` if not found.
*/
wchar_t* wcsncasestr(const wchar_t* haystack, const wchar_t* needle, size_t maxlen)
{
return wmemcasemem(haystack, wcsnlen(haystack, maxlen), needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case sensitive.
* It must already be known that such a substring exists.
*
* This is a slibc extension.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @return Pointer to the first occurrence of the substring.
*/
wchar_t* rawwcsstr(const wchar_t* haystack, const wchar_t* needle)
{
return wmemmem(haystack, SIZE_MAX, needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case insensitive.
* It must already be known that such a substring exists.
*
* This is a slibc extension.
*
* @param haystack The string to search.
* @param needle The sought after substring.
* @return Pointer to the first occurrence of the substring.
*/
wchar_t* rawwcscasestr(const wchar_t* haystack, const wchar_t* needle)
{
return wmemcasemem(haystack, SIZE_MAX, needle, wcslen(needle));
}
/**
* Finds the first occurrence of a substring.
* This search is case sensitive.
*
* This is a slibc extension added for completeness,
* and because it was it was useful in implementing
* slibc itself.
*
* @param haystack The string to search.
* @param haystack_length The number of character to search.
* @param needle The sought after substring.
* @param needle_length The length of `needle`.
* @return Pointer to the first occurrence of
* the substring, `NULL` if not found.
*/
wchar_t* wmemmem(const wchar_t* haystack, size_t haystack_length,
const wchar_t* needle, size_t needle_length)
{
if (haystack_length < needle_length)
return NULL;
if (haystack_length == needle_length)
return !wmemcmp(haystack, needle, haystack_length) ? haystack : NULL;
#include "../string/substring.h"
}
/**
* Finds the first occurrence of a substring.
* This search is case insensitive.
*
* This is a slibc extension added because it was useful
* in implementing slibc itself.
*
* @param haystack The string to search.
* @param haystack_length The number of character to search.
* @param needle The sought after substring.
* @param needle_length The length of `needle`.
* @return Pointer to the first occurrence of
* the substring, `NULL` if not found.
*/
wchar_t* wmemcasemem(const wchar_t* haystack, size_t haystack_length,
const wchar_t* needle, size_t needle_length)
{
if (haystack_length < needle_length)
return NULL;
if (haystack_length == needle_length)
return !wmemcasecmp(haystack, needle, haystack_length) ? haystack : NULL;
#define CASE
#include "../string/substring.h"
#undef CASE
}
/**
* Check whether a string starts with a specific string.
* This check is case sensitive.
*
* This is a slibc extension.
*
* @param string The string to inspect.
* @param desired The desired beginning of the string.
* @return `string` if `string` begins with
* `desired`, `NULL` otherwise.
*/
wchar_t* wcsstarts(const wchar_t* string, const wchar_t* desired)
{
size_t n = wcslen(string);
size_t m = wcslen(desired);
if (n < m)
return NULL;
return wmemcmp(string, desired, m) ? NULL : string;
}
/**
* Check whether a string ends with a specific string.
* This check is case sensitive.
*
* This is a slibc extension.
*
* @param string The string to inspect.
* @param desired The desired ending of the string.
* @return The `string`, where `desired` beings if
* `string` ends with `desired`, `NULL` otherwise.
*/
wchar_t* wcsends(const wchar_t* string, const wchar_t* desired)
{
size_t n = wcslen(string);
size_t m = wcslen(desired);
if (n < m)
return NULL;
return wmemcmp(string + (n - m), desired, m) ? NULL : (string + n);
}
/**
* Check whether a string starts with a specific string.
* This check is case insensitive.
*
* This is a slibc extension.
*
* @param string The string to inspect.
* @param desired The desired beginning of the string.
* @return `string` if `string` begins with
* `desired`, `NULL` otherwise.
*/
wchar_t* wcscasestarts(const wchar_t* string, const wchar_t* desired)
{
size_t n = wcslen(string);
size_t m = wcslen(desired);
if (n < m)
return NULL;
return wmemcasecmp(string, desired, m) ? NULL : string;
}
/**
* Check whether a string ends with a specific string.
* This check is case insensitive.
*
* This is a slibc extension.
*
* @param string The string to inspect.
* @param desired The desired ending of the string.
* @return The `string`, where `desired` beings if
* `string` ends with `desired`, `NULL` otherwise.
*/
wchar_t* wcscaseends(const wchar_t* string, const wchar_t* desired)
{
size_t n = wcslen(string);
size_t m = wcslen(desired);
if (n < m)
return NULL;
return wmemcasecmp(string + (n - m), desired, m) ? NULL : (string + n);
}
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