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/* Copyright (c) 2003, 2007 Reiner Patommel
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Copyright (c) 2007 Dmitry Xmelkov
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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/* $Id: strsep_P.S,v 1.1.2.1 2007/03/31 23:14:26 dmix Exp $ */
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/** \ingroup avr_pgmspace
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\fn char *strsep_P(char **sp, PGM_P delim)
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\brief Parse a string into tokens.
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The strsep_P() function locates, in the string referenced by \p *sp,
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the first occurrence of any character in the string \p delim (or the
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terminating '\\0' character) and replaces it with a '\\0'. The
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location of the next character after the delimiter character (or \c
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NULL, if the end of the string was reached) is stored in \p *sp. An
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``empty'' field, i.e. one caused by two adjacent delimiter
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characters, can be detected by comparing the location referenced by
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the pointer returned in \p *sp to '\\0'. This function is similar to
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strsep() except that \p delim is a pointer to a string in program
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\return The strsep_P() function returns a pointer to the original
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value of \p *sp. If \p *sp is initially \c NULL, strsep_P() returns
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#if !defined(__DOXYGEN__)
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.type _U(strsep_P),@function
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; check a NULL pointer
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ld XL, Z ; str address
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X_movw str_lo, XL ; save for return
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; get a symbol from str
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brne 2b ; if symbol is't match && no delim end
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brne 1b ; if symbol is absent in delim[] && not a zero
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; chr is founded in delim[] (possible, it is a terminating zero of str)
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tst r0 ; the same, as chr
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X_movw XL, r0 ; __zero_reg__ is r1
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; OK, delimeter symbol is founded
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3: st -X, __zero_reg__ ; replace by '\0'
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adiw XL, 1 ; address of next token
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; save result to *sp and return
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5: X_movw ret_lo, str_lo ; return original address
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.size _U(strsep_P), . - _U(strsep_P)
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#endif /* not __DOXYGEN__ */
added
removed
libc/pmstring/strsep_P.S
