diff options
| -rw-r--r-- | sys/include/lib/string.h | 2 | ||||
| -rw-r--r-- | sys/lib/string/strcmp.c | 42 |
2 files changed, 44 insertions, 0 deletions
diff --git a/sys/include/lib/string.h b/sys/include/lib/string.h index 89c728f..3ae33ea 100644 --- a/sys/include/lib/string.h +++ b/sys/include/lib/string.h @@ -41,6 +41,8 @@ int snprintf(char *s, size_t size, const char *fmt, ...); void *memcpy(void *dest, const void *src, size_t n); int memcmp(const void *s1, const void *s2, size_t n); + void *memset(void *s, int c, size_t n); +int strcmp(const char *s1, const char *s2); #endif /* !_LIB_STRING_H_ */ diff --git a/sys/lib/string/strcmp.c b/sys/lib/string/strcmp.c new file mode 100644 index 0000000..f0a3569 --- /dev/null +++ b/sys/lib/string/strcmp.c @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * 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. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * 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 OWNER 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. + */ + +#include <string.h> + +int +strcmp(const char *s1, const char *s2) +{ + while (*s1 == *s2++) { + if (*s1++ == 0) { + return (0); + } + } + + return (*(unsigned char *)s1 - *(unsigned char *)--s2); +} |