isoc/newlib/strchr.c

1 // SPDX-License-Identifier: BSD-3-Clause
3  * Copyright (c) 1994-2009  Red Hat, Inc.
35 	<<strchr>>---search for character in string
73 #define UNALIGNED(X) ((long)X & (sizeof (long) - 1))
79 #define DETECTNULL(X) (((X) - 0x01010101L) & ~(X) & 0x80808080UL)
83 #define DETECTNULL(X) (((X) - 0x0101010101010101L) & ~(X) & \
99   _CONST unsigned char *s = (_CONST unsigned char *)s1;  variable
110       while (UNALIGNED (s))
112           if (!*s)
113             return (char *) s;
114           s++;
117       aligned_addr = (unsigned long *) s;
121       s = (const unsigned char *) aligned_addr;
122       while (*s)
123         s++;
124       return (char *) s;
128   while (UNALIGNED (s))
130       if (!*s)
132       if (*s == c)
133         return (char *) s;
134       s++;
141   aligned_addr = (unsigned long *) s;
149   s = (unsigned char *) aligned_addr;
153   while (*s && *s != c)
154     s++;
155   if (*s == c)
156     return (char *)s;