45 lines
784 B
C
45 lines
784 B
C
/* string.h: Extra string defs
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Copyright 2001 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _CYGWIN_STRING_H
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#define _CYGWIN_STRING_H
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#include_next <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#undef strchr
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#define strchr cygwin_strchr
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static inline __stdcall char *
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strchr (const char *s, int c)
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{
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register char * res;
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__asm__ __volatile__ ("\
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movb %%al,%%ah\n\
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1: movb (%1),%%al\n\
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cmpb %%ah,%%al\n\
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je 2f\n\
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incl %1\n\
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testb %%al,%%al\n\
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jne 1b\n\
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xorl %1,%1\n\
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2: movl %1,%0\n\
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":"=a" (res), "=r" (s)
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:"0" (c), "1" (s));
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return res;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CYGWIN_STRING_H */
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