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/*
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* FUNCTION
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* <<strspn>>---find initial match
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* INDEX
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* strspn
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* ANSI_SYNOPSIS
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* #include <string.h>
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* size_t strspn(const char *<[s1]>, const char *<[s2]>);
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* TRAD_SYNOPSIS
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* #include <string.h>
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* size_t strspn(<[s1]>, <[s2]>)
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* char *<[s1]>;
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* char *<[s2]>;
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* This function computes the length of the initial segment of
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* the string pointed to by <[s1]> which consists entirely of
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* characters from the string pointed to by <[s2]> (excluding the
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* terminating null character).
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* RETURNS
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* <<strspn>> returns the length of the segment found.
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* PORTABILITY
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* <<strspn>> is ANSI C.
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* <<strspn>> requires no supporting OS subroutines.
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* QUICKREF
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* strspn ansi pure
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*
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*
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*/
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#include <string.h>
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/**
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Get length of substring composed of given characters.
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Scans s1 character by character, returning the number of characters read before
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the first character not included in s2 is found.
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The search does not include terminating null-characters.
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@return the length of the initial substring of s1
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that is only composed of characters included in s2.
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@param s1 Null-terminated string to be scanned.
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@param s2 Null-terminated string containing character set.
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*/
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EXPORT_C size_t
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strspn (const char *s1, const char *s2)
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{
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const char *s = s1;
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const char *c;
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while (*s1)
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{
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for (c = s2; *c; c++)
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{
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if (*s1 == *c)
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break;
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}
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if (*c == '\0')
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break;
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s1++;
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}
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return s1 - s;
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}
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