1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24#include "stdhdr.h"
25
26ssize_t
27getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
28{
29	ssize_t		m;
30	ssize_t		n;
31	ssize_t		k;
32	ssize_t		p;
33	uchar*		s;
34	uchar*		ps;
35	SFMTXDECL(f);
36
37	STDIO_INT(f, "getdelim", ssize_t, (char**, size_t*, int, Sfio_t*), (sp, np, delim, f))
38
39	SFMTXENTER(f, -1);
40
41	if(delim < 0 || delim > 255 || !sp || !np) /* bad parameters */
42		SFMTXRETURN(f, -1);
43
44	if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
45		SFMTXRETURN(f, -1);
46
47	SFLOCK(f,0);
48
49	if(!(s = (uchar*)(*sp)) || (n = *np) < 0)
50		{ s = NIL(uchar*); n = 0; }
51	for(m = 0;; )
52	{	/* read new data */
53		if((p = f->endb - (ps = f->next)) <= 0 )
54		{	f->getr = delim;
55			f->mode |= SF_RC;
56			if(SFRPEEK(f,ps,p) <= 0)
57			{	m = -1;
58				break;
59			}
60		}
61
62		for(k = 0; k < p; ++k) /* find the delimiter */
63		{	if(ps[k] == delim)
64			{	k += 1; /* include delim in copying */
65				break;
66			}
67		}
68
69		if((m+k+1) >= n ) /* make sure there is space */
70		{	n = ((m+k+15)/8)*8;
71			if(!(s = (uchar*)realloc(s, n)) )
72			{	*sp = 0; *np = 0;
73				m = -1;
74				break;
75			}
76			*sp = (char*)s; *np = n;
77		}
78
79		memcpy(s+m, ps, k); m += k;
80		f->next = ps+k; /* skip copied data in buffer */
81
82		if(s[m-1] == delim)
83		{	s[m] = 0; /* 0-terminated */
84			break;
85		}
86	}
87
88	SFOPEN(f,0);
89	SFMTXRETURN(f,m);
90}
91
92ssize_t
93__getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
94{
95	return getdelim(sp, np, delim, f);
96}
97