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userspace/libc: implement strncpy function

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
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EnderIce2 2025-02-12 02:42:51 +02:00
parent 23a17fae00
commit 24fd486764
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GPG Key ID: 2EE20AF089811A5A
2 changed files with 14 additions and 2 deletions
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2
Userspace/libc/include/string.h
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@ -51,7 +51,7 @@ extern "C"
size_t strlen(const char *s); size_t strlen(const char *s);
char *strncat(char *restrict, const char *restrict, size_t); char *strncat(char *restrict, const char *restrict, size_t);
int strncmp(const char *s1, const char *s2, size_t n); int strncmp(const char *s1, const char *s2, size_t n);
char *strncpy(char *restrict, const char *restrict, size_t); char *strncpy(char *restrict s1, const char *restrict s2, size_t n);
char *strndup(const char *, size_t); char *strndup(const char *, size_t);
size_t strnlen(const char *, size_t); size_t strnlen(const char *, size_t);
char *strpbrk(const char *s1, const char *s2); char *strpbrk(const char *s1, const char *s2);

14
Userspace/libc/src/std/string.c
View File

@ -124,7 +124,19 @@ export int strncmp(const char *s1, const char *s2, size_t n)
return 0; return 0;
} }
export char *strncpy(char *restrict, const char *restrict, size_t); export char *strncpy(char *restrict s1, const char *restrict s2, size_t n)
{
char *dest = s1;
while (n && (*dest++ = *s2++))
n--;
if (n)
while (--n)
*dest++ = '\0';
return s1;
}
export char *strndup(const char *, size_t); export char *strndup(const char *, size_t);
export size_t strnlen(const char *, size_t); export size_t strnlen(const char *, size_t);