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/* Searching in a string.
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Copyright (C) 2001-2003, 2006, 2009-2010 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* The functions defined in this file assume a nearly ASCII compatible
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/* Find the first occurrence of NEEDLE in HAYSTACK.
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This function is safe to be called, even in a multibyte locale, if NEEDLE
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1. consists solely of printable ASCII characters excluding '\\' and '~'
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[this restriction is needed because of Shift_JIS and JOHAB]
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or of the control ASCII characters '\a' '\b' '\f' '\n' '\r' '\t' '\v'
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[this restriction is needed because of VISCII], and
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2. has at least length 2
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[this restriction is needed because of BIG5, BIG5-HKSCS, GBK, GB18030,
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Shift_JIS, JOHAB], and
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3. does not consist entirely of decimal digits, or has at least length 4
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[this restricion is needed because of GB18030].
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This function is also safe to be called, even in a multibyte locale, if
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HAYSTACK and NEEDLE are known to both consist solely of printable ASCII
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characters excluding '\\' and '~'. */
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extern char *c_strstr (const char *haystack, const char *needle);