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Annotation of prex-old/boot/lib/string.c, Revision 1.1.1.1.2.1

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: /*
                     31:  * string.c - minimum string library
                     32:  */
                     33:
                     34: #include <sys/types.h>
1.1.1.1.2.1! nbrk       35: #include <boot.h>
1.1       nbrk       36:
                     37: char *strncpy(char *dest, const char *src, size_t count)
                     38: {
                     39:        char *tmp = dest;
                     40:
                     41:        while (count-- && (*dest++ = *src++) != '\0');
                     42:        return tmp;
                     43: }
                     44:
                     45: int strncmp(const char *src, const char *tgt, size_t count)
                     46: {
                     47:        signed char res = 0;
                     48:
                     49:        while (count) {
                     50:                if ((res = *src - *tgt++) != 0 || !*src++)
                     51:                        break;
                     52:                count--;
                     53:        }
                     54:        return res;
                     55: }
                     56:
                     57: size_t strnlen(const char *str, size_t count)
                     58: {
                     59:        const char *tmp;
                     60:
                     61:        for (tmp = str; count-- && *tmp != '\0'; ++tmp);
                     62:        return (size_t)(tmp - str);
                     63: }
                     64:
                     65: void *memcpy(void *dest, const void *src, size_t count)
                     66: {
                     67:        char *tmp = (char *)dest, *s = (char *)src;
                     68:
                     69:        while (count--)
                     70:                *tmp++ = *s++;
                     71:        return dest;
                     72: }
                     73:
                     74: void *memset(void *dest, int ch, size_t count)
                     75: {
                     76:        char *p = (char *)dest;
                     77:
                     78:        while (count--)
                     79:                *p++ = (char)ch;
                     80:        return dest;
                     81: }