72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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FUNCTION
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<<strxfrm_l>>---transform string
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INDEX
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strxfrm_l
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SYNOPSIS
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#include <string.h>
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size_t strxfrm_l(char *restrict <[s1]>, const char *restrict <[s2]>,
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size_t <[n]>, locale_t <[locale]>);
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DESCRIPTION
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This function transforms the string pointed to by <[s2]> and
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places the resulting string into the array pointed to by
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<[s1]>. The transformation is such that if the <<strcmp>>
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function is applied to the two transformed strings, it returns
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a value greater than, equal to, or less than zero,
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correspoinding to the result of a <<strcoll>> function applied
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to the same two original strings.
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No more than <[n]> characters are placed into the resulting
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array pointed to by <[s1]>, including the terminating null
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character. If <[n]> is zero, <[s1]> may be a null pointer. If
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copying takes place between objects that overlap, the behavior
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is undefined.
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(NOT Cygwin:) The current implementation of <<strxfrm_l>> simply copies
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the input and does not support any language-specific transformations.
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If <[locale]> is LC_GLOBAL_LOCALE or not a valid locale object, the
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behaviour is undefined.
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RETURNS
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The <<strxfrm_l>> function returns the length of the transformed string
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(not including the terminating null character). If the value returned
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is <[n]> or more, the contents of the array pointed to by
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<[s1]> are indeterminate.
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PORTABILITY
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<<strxfrm_l>> is POSIX-1.2008.
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<<strxfrm_l>> requires no supporting OS subroutines.
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QUICKREF
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strxfrm_l ansi pure
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*/
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#include <string.h>
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size_t
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strxfrm_l (char *__restrict s1, const char *__restrict s2, size_t n,
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struct __locale_t *locale)
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{
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size_t res;
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res = 0;
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while (n-- > 0)
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{
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if ((*s1++ = *s2++) != '\0')
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++res;
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else
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return res;
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}
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while (*s2)
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{
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++s2;
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++res;
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}
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return res;
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}
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