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LibC: Start work on locales

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This patch adds 2 locales, POSIX locale and UTF8 locale.

functions `mbstowcs()` and `strcoll()` use locales to do convertions and
comparison respectively.
This commit is contained in:
Bananymous
2024-08-07 19:00:05 +03:00
parent 7afdfb150f
commit 3b23458ecc
5 changed files with 183 additions and 13 deletions
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38
userspace/libraries/LibC/string.cpp
View File

@@ -1,4 +1,8 @@
#include <BAN/Assert.h>
#include <BAN/UTF8.h>
#include <errno.h>
#include <locale.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@@ -138,8 +142,38 @@ char* strncat(char* __restrict__ dest, const char* __restrict__ src, size_t n)
int strcoll(const char* s1, const char* s2)
{
// FIXME: support locales
return strcmp(s1, s2);
switch (__getlocale(LC_COLLATE))
{
case LOCALE_INVALID:
ASSERT_NOT_REACHED();
case LOCALE_POSIX:
return strcmp(s1, s2);
case LOCALE_UTF8:
{
const unsigned char* u1 = (unsigned char*)s1;
const unsigned char* u2 = (unsigned char*)s2;
if (!*u1 || !*u2)
return *u1 - *u2;
wchar_t wc1, wc2;
while (*u1 && *u2)
{
wc1 = BAN::UTF8::to_codepoint(u1);
wc2 = BAN::UTF8::to_codepoint(u2);
if (wc1 == (wchar_t)BAN::UTF8::invalid || wc2 == (wchar_t)BAN::UTF8::invalid)
{
errno = EINVAL;
return -1;
}
if (wc1 != wc2)
break;
u1 += BAN::UTF8::byte_length(*u1);
u2 += BAN::UTF8::byte_length(*u2);
}
return wc1 - wc2;
}
}
ASSERT_NOT_REACHED();
}
char* strdup(const char* str)