94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1985-2011 AT&T Intellectual Property *
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* Copyright (c) 2020-2022 Contributors to ksh 93u+m *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* Glenn Fowler <gsf@research.att.com> *
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* David Korn <dgk@research.att.com> *
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* Phong Vo <kpv@research.att.com> *
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* *
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***********************************************************************/
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#include "stdhdr.h"
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ssize_t
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getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
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{
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ssize_t m;
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ssize_t n;
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ssize_t k;
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ssize_t p;
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uchar* s;
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uchar* ps;
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STDIO_INT(f, "getdelim", ssize_t, (char**, size_t*, int, Sfio_t*), (sp, np, delim, f))
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if(delim < 0 || delim > 255 || !sp || !np) /* bad parameters */
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return -1;
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if(!f || (f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0))
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return -1;
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SFLOCK(f,0);
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if(!(s = (uchar*)(*sp)) || (n = *np) < 0)
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{ s = NIL(uchar*); n = 0; }
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for(m = 0;; )
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{ /* read new data */
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if((p = f->endb - (ps = f->next)) <= 0 )
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{ f->getr = delim;
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f->mode |= SF_RC;
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if(SFRPEEK(f,ps,p) <= 0)
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{ m = -1;
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break;
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}
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}
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for(k = 0; k < p; ++k) /* find the delimiter */
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{ if(ps[k] == delim)
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{ k += 1; /* include delim in copying */
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break;
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}
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}
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if((m+k+1) >= n ) /* make sure there is space */
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{ n = ((m+k+15)/8)*8;
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if(!(s = (uchar*)realloc(s, n)) )
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{ *sp = 0; *np = 0;
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m = -1;
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break;
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}
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*sp = (char*)s; *np = n;
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}
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memcpy(s+m, ps, k); m += k;
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f->next = ps+k; /* skip copied data in buffer */
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if(s[m-1] == delim)
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{ s[m] = 0; /* 0-terminated */
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break;
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}
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}
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SFOPEN(f,0);
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return m;
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}
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ssize_t
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__getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
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{
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return getdelim(sp, np, delim, f);
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}
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